CN120398217A - A water-coal separation device and circulation method located behind a TBM - Google Patents

Abstract

The invention discloses a water-coal separation device and a circulating method matched with the water-coal separation device behind a TBM (Tunnel boring machine), and relates to the technical field of TBM coal receiving technology. The invention has the beneficial effects that by adopting the shunt pipe and the stirring component, the characteristics of uneven granularity of TBM coal products and gangue in the water-coal mixture generated by the TBM process are effectively treated, and the high-efficiency separation is realized.

Description

Water-coal separation device matched with TBM (Tunnel boring machine) behind TBM (Tunnel boring machine) and circulating method

Technical Field

The invention relates to the technical field of TBM rock roadway tunneling and coal receiving processes, in particular to a water-coal separation device and a circulating method matched with the TBM.

Background

As the full-face hard rock Tunnel Boring Machine (TBM) has high boring efficiency, the average month boring speed exceeds 500 m/month, which is 3-5 times of that of the traditional drilling and blasting method. The TBM can obviously improve the rock roadway exploitation efficiency, alleviate the problem of mining unbalance and reduce the situation of safety control lag when applied to a coal mine. In the coal mine rock roadway development process, TBM inevitably passes through the coal seam due to fluctuation of multiple coal seams. Current regulations do not allow TBM to be used directly on coal because of the risk of coal and gas outburst. And under the condition of keeping a safe distance, after the coal is drilled to a specified coal bed position through the directional drill, firstly extracting gas to below a specified concentration, then injecting high-pressure water flow to crush the coal bed to form a water-coal mixture, extracting the water-coal mixture to a TBM (Tunnel boring machine) and then carrying out matched area treatment, then injecting filling slurry, and after the slurry is solidified, tunneling the TBM according to a common stratum to finish coal bed crossing. Compared with the traditional coal mining mode, the industrial formed water-coal mixture has obvious difference that the water content is up to 70-85%, the particle size distribution of the coal slime is mainly of fine particle size (less than 0.5 mm), and meanwhile, the industrial formed water-coal mixture also contains medium particle size, blocky coal and gangue materials with different proportions, and the complexity of the particle size distribution makes the traditional single separation technology difficult to treat efficiently. The existing water-coal separation technology is mainly designed aiming at the traditional coal mining technology, such as the conventional cyclone separation, flotation method, heavy medium separation and the like, and the methods have the problem of insufficient adaptability when treating high-water-content and fine-fraction water-coal mixtures. In particular to the aspects of separation efficiency, wastewater treatment and water resource recycling, the prior art is difficult to meet the special requirements of the process. In addition, the traditional separation equipment is complex in structure, large in occupied area and incapable of being flexibly deployed in a narrow space under a mine.

The main problems of the current water-coal separation technology include that firstly, the pertinence of a treatment device is insufficient, the characteristics of a water-coal mixture formed by high-pressure water injection coal cutting and extraction cannot be fully considered, so that the separation efficiency is low, secondly, a wastewater treatment system generated in the separation process is not smoothly connected with a main separation device, the recovery rate of fine particulate matters in wastewater is low, thirdly, the cyclic utilization degree of water resources is not high, closed-loop treatment cannot be realized, fourthly, the system integration is insufficient, the cooperativity among equipment is poor, so that the overall operation efficiency is low, thirdly, the operation parameter adjustment capability of the device is limited, the device is difficult to adapt to the requirements of different working conditions, thirdly, the design of the device is heavy, and the device cannot be matched and fused with TBM and is suitable for a narrow tunneling space of TBM.

Disclosure of Invention

The present invention has been made in view of the above-mentioned or existing problems occurring in the prior art.

It is therefore an object of the present invention to provide a water-coal separation device located after a TBM that addresses the problems mentioned in the background.

In order to solve the technical problems, the invention provides the following technical scheme: the water-coal separation device comprises a separation unit, a separation device and a separation device, wherein the separation unit comprises a guide shell, a stirring assembly and a first transportation assembly, the stirring assembly is fixed at the top of the guide shell, and the first transportation assembly is arranged in the guide shell;

The sedimentation unit comprises a dosing tank arranged at the bottom of the diversion shell, a mixing tank arranged at the bottom of the dosing tank, a first sedimentation tank arranged at one side of the dosing tank and the mixing tank, a second sedimentation tank arranged at one side of the first sedimentation tank, pumping components respectively communicated between the mixing tank and the first sedimentation tank and between the first sedimentation tank and the second sedimentation tank, a collecting pipe communicated between the first sedimentation tank and the second sedimentation tank, and a second conveying component arranged inside the first sedimentation tank.

As a preferable scheme of the water-coal separation device matched with the TBM, the invention also comprises a supporting unit which comprises a bottom plate, a pair of long plates and a pair of short plates which are fixed on the periphery of the bottom plate, a transverse plate which is fixed between the pair of long plates, a plurality of supporting seats which are fixed on the upper surface of the bottom plate, and

The electromagnetic valves are respectively fixed at the bottom of the dosing tank and below the side wall of the first settling tank.

The invention relates to a water-coal separation device matched with a TBM (Tunnel boring machine), which is characterized in that the diversion shell comprises a conveying port, an inclined plate fixed at the bottom of the diversion shell, a blanking port arranged at one side of the inclined plate, a first shunt pipe fixed at the top of the blanking port and a second shunt pipe fixed at the bottom of the blanking port;

The sections of the first shunt pipe and the second shunt pipe are arc-shaped, and dense filter openings are formed in the bottoms of the first shunt pipe and the second shunt pipe;

The stirring assembly comprises a character plate, a first motor, a rocking disc, a connecting rod and a piston plate, wherein the first motor is fixed on the upper surface of the character plate, the rocking disc is fixed on the shaft end of the first motor, the connecting rod is hinged to one side of the rocking arm, and the piston plate is hinged to the other end of the connecting rod;

the character plate comprises a movable groove arranged at the top of the character plate and a limiting cylinder fixed at the bottom of the movable groove;

the rocking disc comprises a rocking arm fixed on one side surface of the rocking disc;

The piston plate comprises a piston column fixed at the bottom of the piston plate;

The first transportation assembly comprises an L-shaped plate, a second motor fixed on the surface of the L-shaped plate, a first screw rod fixed on the shaft end of the second motor, a first belt pulley fixed on the shaft body of the first screw rod, a second screw rod arranged around the first screw rod, a second belt pulley fixed on the shaft body of the second screw rod, and a belt matched with the first belt pulley and the second belt pulley.

As a preferable scheme of the water-coal separation device matched with the TBM, the invention comprises a dosing tank and a water inlet pipe, wherein the water inlet pipe is fixed at the top of the dosing tank, and a first water outlet pipe is fixed at the bottom of the dosing tank;

the mixing box comprises a second water outlet pipe fixed at the bottom of the mixing box.

The invention relates to a water-coal separation device matched with a TBM (Tunnel boring machine) at the back, which is characterized in that the first settling tank comprises a third water outlet pipe fixed at the bottom of the side wall of the first settling tank, a settling tank which is arranged at one side of the bottom of the first settling tank and is adjacent to the third water outlet pipe, a sealing pipe fixed at one side of the settling tank and extends obliquely, a sealing cover fixed at the opening of the sealing pipe, a plurality of spoilers fixed at the side wall of the first settling tank, and a plurality of pairs of mounting grooves arranged at the top of the first settling tank;

The sealing cover comprises a discharge hole formed in the side wall of the sealing cover, a driving pipe fixed to the side wall of the sealing cover, and a straight plate fixed to the side wall of the sealing cover;

the second sedimentation tank comprises a plurality of mounting holes formed in the side wall of the second sedimentation tank, a drain pipe fixed on the side wall of the second sedimentation tank and extending to the outside, and a fourth water outlet pipe fixed at the bottom of the second sedimentation tank;

the drain pipe comprises an overflow groove which is arranged on the side wall of the drain pipe and faces upwards.

As a preferable scheme of the water-coal separation device matched with the TBM, the invention comprises a collecting pipe, a water inlet pipe and a water outlet pipe, wherein the collecting pipe comprises a water collecting tank which is arranged on the pipe wall of the water collecting pipe;

the second conveying assembly comprises a third screw rod, a separation plate and a worm wheel which are fixed at one end of the rod body of the third screw rod, a third motor which is fixed on the surface of the straight plate, and a worm which is fixed at the shaft end of the third motor.

As a preferable scheme of the water-coal separation device matched with the TBM, the pumping assembly comprises a sludge pump, a first connecting pipe fixed at the inlet of the sludge pump, a second connecting pipe fixed at the outlet of the sludge pump and a shunt pipe fixed at the tail end of the second connecting pipe;

the shunt tube comprises a plurality of shunt ports which are arranged on the side wall of the shunt tube and face downwards.

The circulating method for separating water and coal after TBM includes introducing the water-coal mixture produced in TBM process into separating unit, conveying recovered coal and gangue to corresponding distributing pipeline via density difference separating principle, and introducing the mixture comprising fine material and water into depositing unit;

Adding a flocculating agent into the mixed solution, separating out sediment and supernatant fluid through multistage precipitation treatment, discharging the sediment, and collecting the supernatant fluid;

And conveying the supernatant to a TBM process water jet system for recycling.

The separation unit comprises a diversion shell and a stirring component, and the corresponding diversion pipeline comprises a first diversion pipe and a second diversion pipe;

the water-coal mixture formed by high-pressure water injection and coal cutting in the TBM tunneling process is led into a separation unit, specifically, the water-coal mixture is led into the diversion shell through a conveying port;

the reclaimed coal and the gangue are respectively conveyed to the corresponding shunt pipelines through a density differential separation principle, specifically, the stirring assembly is started to generate liquid level fluctuation, so that the reclaimed coal floats to the upper layer and enters the first shunt pipe, and the gangue is settled and enters the second shunt pipe through the blanking port.

The mixed solution composed of the fine-fraction material and water is led into a precipitation unit, specifically, the fine-fraction material and the water flow into the precipitation unit through a filtering port;

the sedimentation unit comprises a dosing box, a mixing box, a first sedimentation box and a second sedimentation box;

Adding a flocculating agent into the mixed liquid, specifically adding the flocculating agent into the dosing tank through a water injection pipe, and enabling the flocculating agent to flow into the mixed tank through a first water outlet pipe to be mixed with the mixed liquid;

the sediment and the supernatant are separated through multistage sedimentation treatment, specifically, the mixed liquid is conveyed to the first sedimentation tank through a pumping assembly to carry out primary sedimentation, and the supernatant flows into the second sedimentation tank through a collecting pipe to carry out secondary sedimentation;

And conveying the supernatant to a TBM process water jet system for recycling, namely collecting clear water overflowed from a drain pipe of the second settling tank, and returning the clear water meeting the water quality requirement to the TBM process water jet system.

The invention has the beneficial effects that the high-efficiency separation is realized by adopting the shunt pipe and the stirring component to effectively cope with the characteristic of uneven granularity of TBM coal products and gangue in a water-coal mixture formed by high-pressure water injection and coal cutting in the TBM tunneling process, the capturing and processing efficiency of fine-particle suspended matters is improved by adopting the two-stage precipitation structure and the special conveying component, the system integration level is high, the units are cooperatively matched to form a complete processing-circulating system, and finally, the system has a compact structure, is simple and convenient to operate, is easy to deploy and maintain in a mine site, and simultaneously realizes the high-efficiency cyclic utilization of water resources and reduces the production cost and the environmental impact.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is an overall three-dimensional view of the present invention.

Fig. 2 is an overall exploded view of the present invention.

Fig. 3 is an exploded view of the separation unit of the present invention.

Fig. 4 is an exploded view of a first transport assembly of the present invention.

FIG. 5 is an exploded view of the precipitation unit of the present invention.

Fig. 6 is a diagram showing a connection relationship of the first settling tank of the present invention.

Fig. 7 is a view showing the construction of the medicine feeding box and the mixing box of the present invention.

Fig. 8 is a structural view of the first settling tank of the present invention.

Fig. 9 is a structural view of a second settling tank of the present invention.

Fig. 10 is an overall top view of the present invention.

Fig. 11 is a full cross-sectional view of A-A of fig. 10 in accordance with the present invention.

Fig. 12 is a full sectional view of B-B of fig. 10 in accordance with the present invention.

Fig. 13 is a full cross-sectional view of fig. 10 in accordance with the present invention.

Detailed Description

In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways other than those described, and persons skilled in the art will readily appreciate that the present invention is not limited to the specific embodiments disclosed below.

Further, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic can be included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

Example 1

Referring to fig. 1 to 13, in a first embodiment of the present invention, the embodiment provides a water-coal separation device matched with a TBM, which includes a separation unit 1, including a diversion shell 11, a stirring assembly 12 fixed on the top of the diversion shell 11, and a first transportation assembly 13 disposed inside the diversion shell 11;

The precipitation unit 2 comprises a dosing tank 21 arranged at the bottom of the diversion shell 11, a mixing tank 22 arranged at the bottom of the dosing tank 21, a first precipitation tank 23 arranged at one side of the dosing tank 21 and the mixing tank 22, a second precipitation tank 24 arranged at one side of the first precipitation tank 23, pumping components 25 respectively communicated between the mixing tank 22 and the first precipitation tank 23 and between the first precipitation tank 23 and the second precipitation tank 24, a collecting pipe 26 communicated between the first precipitation tank 23 and the second precipitation tank 24, and a second conveying component 27 arranged inside the first precipitation tank 23.

Further, the support unit 3 comprises a bottom plate 31, a pair of long plates 32 and a pair of short plates 33 fixed around the bottom plate 31, a transverse plate 34 fixed between the pair of long plates 32, and a plurality of support seats 35 fixed on the upper surface of the bottom plate 31, and

A plurality of electromagnetic valves 4, wherein the electromagnetic valves 4 are respectively fixed at the bottom of the dosing tank 21 and below the side wall of the first settling tank 23.

Further, the diversion shell 11 comprises a conveying port 111, an inclined plate 112 fixed at the bottom of the diversion shell 11, a blanking port 113 arranged at one side of the inclined plate 112, a first shunt pipe 114 fixed at the top of the blanking port 113, and a second shunt pipe 115 fixed at the bottom of the blanking port 113;

The cross sections of the first shunt pipe 114 and the second shunt pipe 115 are arc-shaped, and dense filtering openings M are formed in the bottoms of the first shunt pipe and the second shunt pipe;

the toggle assembly 12 comprises a character plate 121, a first motor 122 fixed on the upper surface of the character plate 121, a rocking disc 123 fixed on the shaft end of the first motor 122, a connecting rod 124 hinged on one side of the rocking disc 123, and a piston plate 125 hinged on the other end of the connecting rod 124;

The word plate 121 comprises a movable groove 1211 arranged at the top of the word plate and a limit cylinder 1212 fixed at the bottom of the movable groove 1211;

The rocker plate 123 includes a rocker arm 1231 fixed to one side surface thereof;

The piston plate 125 includes a piston post 1251 fixed to the bottom thereof;

The first transport assembly 13 includes an L-shaped plate 131, a second motor 132 fixed to a surface of the L-shaped plate 131, a first screw rod 133 fixed to a shaft end of the second motor 132, a first pulley 134 fixed to a shaft of the first screw rod 133, a second screw rod 135 provided around the first screw rod 133, a second pulley 136 fixed to a shaft of the second screw rod 135, and a belt 137 engaged with the first pulley 134 and the second pulley 136.

Further, the dosing tank 21 includes a water injection pipe 211 fixed to the top thereof, and a first water outlet pipe 212 fixed to the bottom of the dosing tank 21;

the mixing tank 22 includes a second outlet pipe 221 fixed to the bottom thereof.

Further, the first settling tank 23 includes a third water outlet pipe 231 fixed at the bottom of the sidewall thereof, a settling tank 232 opened at one side of the bottom of the first settling tank 23 and adjacent to the third water outlet pipe 231, a sealing pipe 233 fixed at one side of the settling tank 232 and extending obliquely, a sealing cover 234 fixed at the opening of the sealing pipe 233, a plurality of spoilers 235 fixed at the sidewall of the first settling tank 23, and a plurality of pairs of mounting grooves 236 opened at the top of the first settling tank 23;

the sealing cover 234 comprises a discharge hole 2341 arranged on the side wall of the sealing cover 234, a driving pipe 2342 fixed on the side wall of the sealing cover 234, and a straight plate 2343 fixed on the side wall of the sealing cover 234;

the second settling tank 24 includes a plurality of mounting holes 241 formed at a sidewall thereof, a drain pipe 242 fixed to the sidewall of the second settling tank 24 and extending to the outside, and a fourth water outlet pipe 243 fixed to the bottom of the second settling tank 24;

the drain pipe 242 includes an overflow groove 2421 formed on a sidewall thereof and facing upward.

Further, the collecting pipe 26 comprises a water collecting groove 261 which is arranged on the pipe wall of the collecting pipe, and the collecting pipe 26 is communicated at one side;

The second conveying unit 27 includes a third screw 271, a partition plate 272 and a worm wheel 273 fixed to one end of a shaft of the third screw 271, a third motor 274 fixed to a surface of the linear plate 2343, and a worm 275 fixed to an end of the third motor 274.

Further, the pumping assembly 25 includes a sludge pump 251, a first connection pipe 252 fixed at an inlet of the sludge pump 251, a second connection pipe 253 fixed at an outlet of the sludge pump 251, and a shunt pipe 254 fixed at an end of the second connection pipe 253;

the shunt 254 includes a plurality of shunt ports 2541 opening into the side wall and facing downward.

After being treated by the sorting device, the TBM water-coal mixture is separated into recyclable TBM coal products, hereinafter referred to as "recycled coal", gangue and wastewater containing coal slime ".

Preferably, the bottom plate 31 in the supporting unit 3 can support the sedimentation unit 2 and is connected with the sedimentation unit 2 through bolts, a pair of long plates 32 and a pair of short plates 33 are respectively fixed on the peripheral edge of the bottom plate 31 through bolts and are box-shaped, wherein a transverse plate 34 is also fixed between the two long plates 32 and used for fixing the dosing tank 21, and two supporting seats 35 are also fixed on the upper surface of the bottom plate 31 through bolts, so that the mixing tank 22 and the second sedimentation tank 24 can be lifted, liquid media collected at the bottom of the tank can be conveniently discharged from water outlets at the bottoms of the mixing tank 22 and the second sedimentation tank 24, and in addition, pipelines can be conveniently paved.

It should be noted that hooks are also fixed on the side wall of the bottom plate 31, and the hooks adopted in this embodiment are symmetrically distributed on two sides of the bottom plate 31, so that the bottom plate 31 can be dragged to the rear of the TBM device in any two directions. In order to ensure continuous and efficient water-coal separation work, the water-coal separation device provided by the application can be continuously dragged to a new working place along with the tunneling progress of the TBM device.

Preferably, the diversion shell 11 is fixed on each long plate 32 and one short plate 33 through bolts at the edge, and the conveying opening 111 at the tail is positioned above the other short plate 33, and is also fixed through bolts for conveying the water-coal mixture, wherein the conveying mode comprises but is not limited to belt conveying and pipeline conveying. The bottom of the diversion shell 11 is fixed with an inclined plate 112, so that the water-coal mixture can flow to a blanking port 113 at the end part of the inclined plate 112, namely, back to the conveying port 111 by gravity, a second shunt pipe 115 is fixed at a position below the blanking port 113, and a first shunt pipe 114 is fixed above the second shunt pipe 115, namely, above the blanking port 113.

The cross sections of the first shunt tube 114 and the second shunt tube 115 are arc-shaped, one ends of the two shunt tubes are fixed on the side wall of the diversion shell 11 and are aligned up and down, dense filtering openings M are formed in the bottoms of the two shunt tubes, and the other ends of the two shunt tubes are open openings extending out of the long plate 32 for discharging materials.

Referring to fig. 11, a dotted line H is a liquid level line of the water-coal mixture, horizontally extends and is located slightly below the end surface of the side wall of the first shunt tube 114, so that the liquid level height can be conveniently maintained, and since the water-coal mixture contains coal particles and gangue particles generated in the high-pressure water injection process, separation can be performed according to different density conditions of the water-coal mixture and the gangue particles by means of a floating and sinking characteristic, and specifically, a significant density difference exists between the coal density and the gangue density in the water-coal mixture generated in the TBM high-pressure water injection process. In a static or micro-vibration state, the recovered coal particles with smaller density tend to float up to the vicinity of the liquid level line, while the gangue particles with larger density settle to the bottom. The present apparatus utilizes this physical property difference to enhance the stratification effect by the pulsating action of the piston plate 125, allowing the floating recovery coal to pass over the side wall of the first shunt tube 114 and into it, while the settled gangue enters the second shunt tube 115 through the blanking port 113. The rest of the wastewater containing coal slime flows out from each filtering opening M from top to bottom.

According to the practical application of the TBM technology, the particle size distribution in the water-coal mixture usually shows uneven characteristics, most of coal particles can be crushed into fine particles in the high-pressure water injection process, a certain proportion of reclaimed coal with medium particle size and a small amount of large blocks still exists, the gangue particles are higher than the coal hardness, the crushing degree is relatively smaller under the action of the high-pressure water injection, obvious blocky gangue is in the coal-slime-containing wastewater, and meanwhile, the gangue particles with medium and fine particle size are also provided, so that the size and the distribution of a filtering port M consider the particle size distribution characteristics of particles in the water-coal mixture generated by high-pressure water injection coal cutting in the TBM tunneling process.

As a preferred embodiment, the size of the filtering opening M can be adjusted within the range of 0.3-2.0mm so as to adapt to the particle separation requirements under different working conditions. The density and the distribution mode of the filtering openings M are distributed in a gradual change mode, so that the water flow distribution is more uniform, and the separation efficiency is improved.

Preferably, the fine fraction of material can be captured and processed by means of a subsequent precipitation unit.

As an alternative embodiment, the extension directions of the first shunt 114 and the second shunt 115 may be horizontal.

As an alternative embodiment, the first shunt 114 and the second shunt 115 may extend obliquely downward, i.e., with the open end below the sealed end, in a manner that facilitates the discharge of material under its own weight.

As a preferred embodiment, the first shunt tubes 114 and the second shunt tubes 115 may extend in an oblique direction, i.e., with the open ends higher than the sealed ends, in a manner that prevents the slime-containing waste water from directly flowing out of the open ends when separating the recovered coal from the gangue.

Preferably, the toggle assembly 12 is located right above the diversion shell 11, specifically, two sides of the table-shaped plate 121 are fixed at the edge of the diversion shell 11 through bolts and adjacent to the first diversion pipe 114, the first motor 122 is also fixed on the upper surface of the table-shaped plate 121, a movable groove 1211 is formed in the position, adjacent to the shaft end of the motor, of the surface of the table-shaped plate 121, and a vertical limit cylinder 1212 is also fixed at the bottom of the movable groove 1211 through a connecting rod.

The rocker 123 is fixed to the shaft end of the first motor 122, and is rotatable with the output shaft of the first motor 122, and a rocker arm 1231 is fixed to a surface of the rocker 123 facing away from the first motor 122 and offset from the shaft center of the output shaft. The rocker arm 1231 is adapted to be hinged to one end of the connecting rod 124, and a piston plate 125 is hinged to the other end of the connecting rod 124. Specifically, a piston post 1251 is further fixed to the upper surface of the piston plate 125, and the other end of the connecting rod 124 is hinged to the piston post 1251. The piston rod 1251 is sleeved inside the limit cylinder 1212, and the piston rod 1251 and the limit cylinder 1212 are mutually attached to each other, so that the piston plate 125 can reciprocate along the axial direction of the limit cylinder 1212 when the output shaft of the first motor 122 rotates.

It should be noted that the piston plate 125 needs to always move below the dashed line H, i.e. the liquid level line. When the water-coal mixture flows into the diversion shell 11 and the liquid level is kept at the liquid level line, the recovered coal is blocked by the first shunt tube 114, along with continuous input of the water-coal mixture, the accumulated recovered coal is pushed to the first shunt tube 114 by the subsequent recovered coal, but the accumulation condition of the recovered coal is aggravated, the separation efficiency is reduced, the control is not facilitated, and the up-and-down reciprocating motion of the piston plate 125 drives the water-coal mixture to fluctuate, so that the floated recovered coal can be smoothly brought into the first shunt tube 114.

Preferably, the first transportation assembly 13 is disposed inside the diversion housing 11, specifically, an L-shaped plate 131 is fixed on the surface of the long plate 32 adjacent to the second diversion pipe 115, and a second motor 132 is fixed on the surface of the L-shaped plate 131 through bolts. The first screw rod 133 and the second screw rod 135 are respectively arranged in the second shunt tube 115 and the first shunt tube 114, the outer walls of the first screw rod 133 and the second screw rod 135 are respectively attached to the inner walls of the second shunt tube 115 and the first shunt tube 114, in addition, the rod ends of the first screw rod 133 and the second screw rod 135 simultaneously penetrate through the sealing ends of the second shunt tube 115 and the first shunt tube 114 and extend out of the long plate 32, so the shaft ends of the second motor 132 can be fixedly connected with the rod ends of the first screw rod 133, in addition, the outer walls of the rod bodies of the extending parts of the first screw rod 133 and the second screw rod 135 are respectively fixed with a first belt pulley 134 and a second belt pulley 136, and the first belt pulley 134 and the second belt pulley 136 are matched to establish transmission, so that when the second motor 132 rotates, the first screw rod 133 and the second screw rod 135 can synchronously rotate, and coal and gangue which respectively fall into the first shunt tube 114 and the second shunt tube 115 can be continuously and effectively transported, and are prevented from being accumulated in each shunt tube.

The mixing box 22 is fixed above the supporting seat 35 under the second shunt tube 115, and can collect the coal slime-containing wastewater separated from the filtering port M by the first shunt tube 114 and the second shunt tube 115, the upper end of the mixing box 22 is open, the inner bottom surface is in an inverted cone shape, and a second water outlet pipe 221 is penetrated and fixed at the center position, namely the lowest point, for discharging the coal slime-containing wastewater.

The dosing tank 21 is bolted between the short plates 33 on both sides and to each other on the side closer to the cross plate 34. The dosing tank 21 is located on one side of the second shunt tube 115, below the inclined plate 112, the upper surface of the dosing tank 21 is penetrated and fixed with a water injection pipe 211, the other end of the water injection pipe 211 penetrates through the long plate 32 for injecting medicament, the inner bottom surface of the dosing tank 21 is also in an inverted cone shape, a first water outlet pipe 212 is penetrated and fixed at the center position, namely the lowest point, for discharging medicament, and in addition, in order to control the opening and closing and flow rate of the first water outlet pipe 212, an electromagnetic valve 4 is fixed at the tail end of the first water outlet pipe 212.

Preferably, the filtering openings M of the first water outlet pipe 212 and the second shunt pipe 115 are both positioned at an upper opening of the mixing box 22, and are used for injecting the medicament while collecting the separated coal slime-containing wastewater, so that the two are fully mixed.

The agent is used for flocculating suspended matters or particles in the wastewater containing coal slime so as to separate the sediment of the next stage, and can be widely applied to polyaluminium chloride with small influence on water, low dosage and high efficiency, polyacrylamide serving as a coagulant aid, biodegradable chitosan and the like.

Preferably, the pumping assemblies 25 have two groups for sucking flocculated coal-slurry-containing waste water, and are used for connecting the mixing tank 22 and the first settling tank 23, specifically, a sludge pump 251 is fixed at the bottom of the bottom plate 31, a first connecting pipe 252 is fixed at an input port of the sludge pump 251, the first connecting pipe 252 is directly connected with a second water outlet pipe 221 at the bottom of the mixing tank 22, a second connecting pipe 253 is connected at an output port of the sludge pump, the second connecting pipe 253 penetrates through the side wall of the first settling tank 23 and extends to the inside, a shunt pipe 254 is fixed at the end of the second connecting pipe 253, and sucked coal-slurry-containing waste water treated by the medicament flows out from a plurality of shunt ports 2541 formed at the end of the shunt pipe 254 and below the side wall thereof.

As an alternative embodiment, the first connection pipe 252 and the second connection pipe 253 may employ hoses. The shunt 254 is fixed to the inner wall of the first settling tank 23.

As an alternative embodiment, the shunt 254 can be positioned horizontally.

In the invention, the first connecting pipe 252 and the second connecting pipe 253 are hard pipelines, bent pipes are adopted at the bent positions and finally extend to the first settling tank 23, the shunt pipes 254 extend downwards in an inclined manner, namely, the pipe end openings are downwards inclined, so that the angle of the bottom surface of the first settling tank 23 can be adapted, the waste water containing coal slime after the medicament is mixed can flow to the bottom surface of the first settling tank 23 uniformly and softly, the disturbance of liquid is reduced, and the quick settling of flocculate is facilitated.

Preferably, the first settling tank 23 is fixed on the upper surface of the bottom plate 31 through bolts and is close to the transverse plate 34, the bottom surface of the first settling tank 23 is obliquely arranged, a settling tank 232 is further arranged at the bottommost end of the bottom surface and used for collecting flocculates, a third water outlet pipe 231 is further communicated and fixed at a position close to the side wall of the settling tank 232, the third water outlet pipe 231 penetrates through the long plate 32, and the tail end of the third water outlet pipe 231 is further fixed with another electromagnetic valve 4 used for controlling the opening and closing of the third water outlet pipe 231, and the third water outlet pipe 231 can be directly used for discharging sewage or discharging sewage after cleaning.

The bottom surface at first sedimentation tank 23 still is fixed with sealed pipe 233, sealed pipe 233 starts in subsider 232, end in first sedimentation tank 23 outsidely, extend with the bottom surface incline direction of first sedimentation tank 23, sealed pipe 233's initiating terminal and subsider 232 intercommunication, the terminating terminal runs through out longwall plate 32, sealed pipe 233's terminating terminal still has sealed lid 234 through the bolt fastening, in addition still fix a plurality of spoilers 235 at the lateral wall of first sedimentation tank 23, the spoilers 235 array is on the lateral wall at third outlet pipe 231 place, and the inside space of shape adaptation first sedimentation tank 23 can further reduce the disturbance that contains the inflow of coal slime waste water after the flocculation, improve precipitation efficiency.

The side wall of the sealing cover 234 is provided with a discharge hole 2341, the discharge hole 2341 faces downwards, a word plate 2343 is fixed on the side of the discharge hole 2341, namely the side wall of the sealing cover 234, and a driving pipe 2342 is arranged above the discharge hole 2341, namely the side wall of the sealing cover 234, and the driving pipe 2342 is a unidirectional opening.

Preferably, the second conveying component 27 is disposed inside the first settling tank 23, specifically, the third screw rod 271 is mounted inside the sealing tube 233, the third screw rod 271 is mutually attached, a rod body at one end of the third screw rod 271 extends out of the sealing tube 233, a separation plate 272 and a worm wheel 273 are sequentially fixed on the outer wall of the rod body at the position from bottom to top, the separation plate 272 and the worm wheel 273 are aligned with the driving tube 2342 inside the sealing cover 234, a third motor 274 is fixed on the surface of the straight plate 2343 through bolts, a worm 275 is fixed at the shaft end of the third motor 274, and the shaft end of the third motor 274 and the worm 275 extend into the driving tube 2342, so that the worm 275 can be matched with the worm wheel 273. When the output shaft of the third motor 274 rotates, the third screw 271 can be dragged to rotate, so that the sediment inside the settling tank 232 is conveyed to the discharge port 2341, and it is noted that the partition plate 272 can prevent the sediment from invading into the worm gear.

As an alternative embodiment, the upper end of the first settling tank 23 may be open.

Preferably, a plurality of paired mounting grooves 236 are further formed at the upper end surface of the first settling tank 23, the shape of the mounting grooves 236 is consistent with that of the collecting pipe 26, so that the collecting pipe 26 can be just mounted in the mounting grooves 236, in addition, in order to further limit the collecting pipe 26, a pair of limiting strips are fixed on the outer wall of the collecting pipe 26, the spacing between the limiting strips is consistent with that of the two side walls of the first settling tank 23, and it is noted that the extending direction of the collecting pipe 26 is perpendicular to the third spiral rod 271.

Preferably, the collecting pipe 26 is a unidirectional opening, the side wall of the first settling tank 23 extends out from the opening side, the pipe wall of the collecting pipe 26 in the first settling tank 23 is provided with an upward water collecting tank 261, so that supernatant liquid in the first settling tank 23 can be conveniently introduced into the collecting pipe 26 and flows out from the opening.

Preferably, the second settling tank 24 is tightly attached to the first settling tank 23 and is fixed on the supporting seat 35, the side wall of the second settling tank 24 adjacent to the first settling tank 23 is provided with mounting holes 241 with the number consistent with that of the collecting pipes 26, the opening sides of the collecting pipes 26 extend into the second settling tank 24, and supernatant after settling separation can be introduced into the second settling tank 24, and the supernatant still mixes a small amount of flocculates. The bottom surface of the second settling tank 24 is also in an inverted cone shape, a fourth water outlet pipe 243 is communicated and fixed at the center, a small amount of flocculate in the flocculate is discharged through the fourth water outlet pipe 243 after further settling, a water outlet pipe 242 is fixed at an upper position of any side wall of the second settling tank 24, the water outlet pipe 242 extends to the outside of the second settling tank 24 from the deep inside, the water outlet pipe 242 is also in a one-way opening, an upward overflow groove 2421 is arranged at the pipe wall part of the water outlet pipe 242 in the second settling tank 24 and is used for collecting the uppermost clear liquid in the second settling tank 24, the flocculated coal slime-containing wastewater at the moment can obtain high-quality clear water through two-stage separation, and the clear water is finally circulated to a high-pressure water injection operation.

As an alternative implementation mode, the device adopts a flow blocking plate 235 and a slow flow structure in the first settling tank 23, namely an inclined bottom surface and a shunt tube 254, so that the settling efficiency is greatly improved. Under the standard working condition, the concentration of suspended matters is 5-15g/L, after the PAC-PAM composite flocculant is added, the dosage is 20-60mg/L, the residence time of the first settling tank is usually controlled to be 15-30 minutes, the residence time of the second settling tank is 30-45 minutes, the suspended matter removal rate can reach more than 95%, the turbidity of the effluent is less than or equal to 10NTU, and the water consumption requirement of a TBM high-pressure water injection system is met.

Preferably, the second settling tank 24 is also connected to the first settling tank 23 through a pumping assembly 25, specifically, the first connecting pipe 252 is fixedly connected to the fourth water outlet pipe 243, the second connecting pipe 253 penetrates from the other side wall of the second settling tank 24, and the flocculate settled in the second settling tank 24 is pumped into the second settling tank 24 through the sludge pump 251 and flows out through the shunt pipe 254, and it should be noted that the two groups of pumping assemblies 25 are symmetrically distributed on two sides of the first settling tank 23.

The operation process of the invention is that the water-coal mixture is sent into the diversion shell 11 from the conveying opening 111, when the extending direction of the first diversion pipe 114 and the second diversion pipe 115 can be inclined upwards, namely the opening end is higher than the sealing end, the water-coal mixture is continuously input along with the sealing end, the water-coal mixture is in a stacked state, when the liquid level reaches the vicinity of the liquid level line, the liquid level begins to disturb the water-coal mixture along with the driving of the first motor 122, the liquid level is in wavy fluctuation, medium-grain and large-block recovered coal and gangue normally begin to separate, the recovered coal and the gangue are in different heights in the water-coal mixture due to different floating characteristics, the recovered coal is brought into the first diversion pipe 114 under the fluctuation and the pushing of the liquid level, the gangue enters the second diversion pipe 115 along with the pushing of the sloping plate 112 and the liquid, the fine-grain material flows out from each filtering opening M along with the liquid, and falls into the inside of the mixing box 22, and under the action of the second motor 132, the second screw rod 135 and the first screw rod drives the two diversion pipes 133 to be sent to the two diversion pipes respectively.

At the same time, the solenoid valve 4 at the bottom of the dosing tank 21 is opened, so that the flocculating agent flows out of the dosing tank 21 to the mixing tank 22, so that the filtered coal-slurry-containing waste water and the agent are thoroughly mixed in the mixing tank 22, while the sludge pump 251 here pumps the coal-slurry-containing waste water with the agent into the first settling tank 23, and then the condensate is deposited from the inclined bottom to the settling tank 232, with the third motor 274 being driven, the third screw 271 discharges the sediment from the discharge port 2341, while the supernatant flows from the collecting pipe 26 to the second settling tank 24, with further deposition over time, the sediment is deposited in the inverted conical surface in the center of the second settling tank 24, at this time the lower sludge pump 251 is started to pump the sediment into the first settling tank 23, the supernatant liquid which is pumped from the second settling tank 24 through the drain pipe 242 can be discharged again in the settling tank 232, and discharged under the drive of the third screw 271, thus forming a cycle of the collecting work.

When cleaning is needed, the sewage generated after cleaning in each tank can be collected into the first settling tank 23 and discharged from the third water outlet pipe 231.

In conclusion, the device has the advantages of realizing high-efficiency separation of the water-coal mixture formed by particles with different granularities and water flows generated by a TBM process through a two-stage separation structure, remarkably improving the treatment efficiency of the water-coal mixture of the TBM process, realizing effective separation of coal, gangue and wastewater, realizing advanced treatment of the wastewater and recycling of water resources through two-stage precipitation treatment, along with compact structure, simple and convenient operation and strong adaptability, and can meet the technical requirements of modern mining engineering.

Example 2

In order to provide a circulation method for separating water from coal, which is matched with the TBM after the TBM, the method comprises the steps of introducing a water-coal mixture generated by the TBM process into a separation unit 1, respectively conveying recovered coal and gangue to corresponding split pipelines by a density differential separation principle, and introducing a mixed solution composed of fine-particle-grade materials and water into a precipitation unit 2;

Adding flocculant into the mixed solution, separating out sediment and supernatant fluid through multistage precipitation treatment, discharging the sediment, and collecting the supernatant fluid;

And conveying the supernatant to a TBM process water jet system for recycling.

Further, the separation unit 1 comprises a diversion shell 11 and a poking assembly 12, and the corresponding diversion pipeline comprises a first diversion pipe 114 and a second diversion pipe 115;

Introducing the water-coal mixture generated by the TBM process into the separation unit 1, specifically, introducing the water-coal mixture into the diversion shell 11 through the conveying port 111;

the recovered coal and the gangue are respectively conveyed to the corresponding shunt pipelines through a density differential separation principle, specifically, the stirring assembly 12 is started to generate liquid level fluctuation, so that the recovered coal floats to the upper layer and enters the first shunt pipe 114, and the gangue is settled and enters the second shunt pipe 115 through the blanking port 113;

introducing a mixed solution composed of fine-fraction materials and water into a precipitation unit 2, specifically, enabling the fine-fraction materials and the water to flow into the precipitation unit 2 through a filtering opening M;

The sedimentation unit 2 comprises a dosing tank 21, a mixing tank 22, a first sedimentation tank 23 and a second sedimentation tank 24;

Adding a flocculating agent into the mixed solution, specifically, adding the flocculating agent into the dosing tank 21 through the water injection pipe 211, and enabling the flocculating agent to flow into the mixing tank 22 through the first water outlet pipe 212 to be mixed with the mixed solution;

Separating sediment and supernatant by multistage sedimentation treatment, specifically, conveying the mixed solution to a first sedimentation tank 23 by a pumping assembly 25 for primary sedimentation, and enabling the supernatant to flow into a second sedimentation tank 24 by a collecting pipe 26 for secondary sedimentation;

The supernatant is conveyed to a TBM process water jet system for recycling, specifically, clear water overflowed from a drain pipe 242 of the second settling tank 24 is collected, and clear water meeting the water quality requirement is returned to the TBM process water jet system.

Further, the liquid level fluctuation generated by the stirring assembly 12 has adjustable parameters, if the content of the fine-fraction materials in the water-coal mixture is higher, the fluctuation frequency is reduced and the fluctuation amplitude is increased;

The aperture of the filtering opening M is adapted to the granularity distribution of fine-fraction materials in the water-coal mixture;

the flocculant is a compound formula of inorganic flocculant and organic polymer flocculant, the addition adopts a sequential addition mode, firstly, the inorganic flocculant is added into a medicine adding box 21 to form micro flocs, after the inorganic flocculant reacts for a certain time, the organic polymer flocculant is added to form large flocs, and the sedimentation process in a first sedimentation box 23 and a second sedimentation box 24 is carried out, so that the sedimentation rate of the flocs is improved The following is followed:

Wherein the method comprises the steps of The acceleration of the gravity is that,In order to obtain the density of the floccule,In order to achieve a liquid density,Is the diameter of the floccule,Is the viscosity of the liquid;

monitoring the water quality index of the supernatant, wherein the water quality index comprises turbidity, suspended matter content, pH value and conductivity, if the turbidity or the suspended matter content exceeds a preset threshold value, the treatment time of the second precipitation tank 24 is prolonged or the dosage of flocculant is increased, if the pH value deviates from a preset range, a pH regulator is added, and if the conductivity exceeds the preset threshold value, an ion exchange method is adopted for treatment;

after the sediment in the first settling tank 23 is discharged through the second conveying assembly 27 and subjected to dehydration treatment, the fine-particle-grade coal slime is used for recycling low-heat-value fuel, liquid generated by dehydration is returned to the mixing tank 22 for reprocessing, and the sediment in the second settling tank 24 is returned to the first settling tank 23 through the fourth water outlet pipe 243 for reprocessing.

It should be noted that, as an alternative embodiment, in particular,

The water-coal mixture generated in the operation process of the TBM tunneling machine is conveyed to the conveying port 111 of the water-coal separation device through a pipeline and flows into the diversion shell 11. The water-coal mixture contains recycled coal with the density of about 1.3-1.5g/cm < 3 >, gangue with the density of about 2.6-2.8g/cm < 3 > and fine-fraction materials with the particle size of less than 0.5mm. The toggle assembly 12 is actuated and the first motor 122 drives the piston plate 125 to reciprocate at a frequency of 20-30 times/minute to produce a liquid level fluctuation having a fluctuation amplitude of 5-8 cm.

The fluctuation of the liquid level promotes the recovered coal to float to the upper layer due to the lower density and enter the first shunt pipe 114 under the fluctuation action, the gangue is settled to the bottom due to the higher density, is guided to the blanking port 113 through the inclined plate 112 and enters the second shunt pipe 115. At the same time, the mixed liquid formed by the fine-fraction material and the water flows out through the filtering openings M at the bottoms of the first shunt pipe 114 and the second shunt pipe 115.

In actual operation, by monitoring the composition characteristics of the water-coal mixture, when the content of the fine-grain-level materials reaches more than 40%, the frequency of the stirring component 12 is adjusted to 15-20 times per minute, the fluctuation range is increased to 8-10cm, and when the content of the fine-grain-level materials is reduced to below 25%, the frequency is increased to 25-35 times per minute, and the fluctuation range is reduced to 4-6cm so as to adapt to the separation requirements of different material compositions.

The recovered coal and gangue entering the first shunt pipe 114 and the second shunt pipe 115 are respectively conveyed out of the system by the screw rods in the first conveying assembly 13, so that the recovery of solid materials is realized, and the mixed solution of fine-fraction materials and water flowing out through the filtering port M enters the mixing box 22 positioned below.

Flocculant is added into the system from a water injection pipe 211 of the dosing tank 21, and a compound formula of inorganic flocculant such as polyaluminum chloride PAC with concentration of 1800-2200mg/L and organic polymer flocculant such as polyacrylamide PAM with concentration of 40-60mg/L is adopted. PAC is added first, flows into the mixing box 22 through the first water outlet pipe 212 and reacts with the mixed solution for 5-8 minutes to form micro-flocs, and PAM is added later to react with the micro-flocs for 2-3 minutes to form large flocs with the diameter of about 0.8-1.5 mm.

The sludge pump 251 in the pumping assembly 25 is activated to pump the mixed liquor to the first settling tank 23 at a flow rate of 2.0-3.0L/s, evenly distributed through the shunt tube 254. In the first settling tank 23, the mixture is left for 30 to 40 minutes for primary settling, and the flocs settle to the bottom slope under the force of gravity and collect in the settling tank 232. The floc settling process follows Stokes' law, settling rateThe calculation is as follows:

Wherein the method comprises the steps of Acceleration of gravity, 9.8m/s2,About 1.1 to 1.3g/cm3 of floc density,Is a liquid density of about 1.0g/cm3,The diameter of the floc is 0.8-1.5mm,Is about 1.0X10 ^-3 Pa.s for liquid viscosity.

The sediment in the first settling tank 23 is continuously conveyed to the discharge port 2341 by the third screw 271 in the second conveying assembly 27 to be discharged. The supernatant flows into the second sedimentation tank 24 through the water collecting tank 261 of the collecting pipe 26 for secondary sedimentation, and the retention time is 45-60 minutes, so that the content of suspended matters is further reduced. A small amount of sediment deposited at the bottom of the second settling tank 24 flows back to the first settling tank 23 through the fourth water outlet pipe 243 for reprocessing.

The supernatant treated by the second settling tank 24 overflows through the overflow tank 2421 of the drain pipe 242. And detecting water quality indexes including turbidity, suspended matter content, pH value and conductivity by using an on-line monitoring device. The water quality standard set by the system is that the turbidity is less than 10NTU, the content of suspended matters is less than 15mg/L, the pH value is 6.5-8.5, and the conductivity is less than 1500 mu S/cm.

In the running process, when the turbidity is monitored to reach 15NTU or the content of suspended matters reaches 20mg/L, the precipitation time of the second precipitation tank 24 is prolonged to 75-90 minutes, or the inorganic flocculant dosage is increased to 2500mg/L, and the organic polymer flocculant dosage is increased to 70mg/L. When the pH value deviates from the preset range, an appropriate amount of an acid-base modifier, such as sodium hydroxide or sulfuric acid solution, is added to the second precipitation tank 24. When the conductivity exceeds 2000. Mu.S/cm, special treatment is performed by the ion exchange apparatus configured.

And the clean water reaching the standard is conveyed back to the TBM process water jet system through the pumping system and is used for cutting coal and rock mass through high-pressure water jet, so that the closed-loop cyclic utilization of water resources is realized.

The sediment discharged from the first settling tank 23 is dehydrated by a plate-and-frame filter press until the water content is below 30%, wherein fine-particle-grade coal slime with the heat value of about 15-20MJ/kg is recycled and used as low-heat-value fuel, and comprehensive utilization of resources is realized. The liquid from the dewatering process is returned to the mixing tank 22 for treatment with the newly entered mixed liquor.

In summary, the method realizes accurate separation based on density difference by generating liquid level fluctuation through the stirring component with adjustable parameters, has high separation efficiency of recovered coal and gangue, realizes the recycling of fine-fraction coal slime, and reduces resource waste. In addition, a two-stage precipitation treatment process is adopted, and the optimized flocculant formula and the optimized addition mode are combined, so that the treated water quality reaches the water standard of the TBM process, the water resource circulation rate of more than 85% is realized, the fresh water resource consumption is obviously reduced, and the water resource pressure of a mining area is reduced. The closed-loop treatment system effectively reduces the discharge amount of the coal-containing wastewater, reduces the environmental pollution, and has the advantages of recycling the sediments and small secondary pollution risk. In addition, the invention automatically adjusts the processing parameters, such as toggle frequency, fluctuation range, flocculant dosage and the like, according to the characteristics of the water-coal mixture, adapts to different working conditions and coal quality conditions, maintains stable processing effect and has high operation reliability.

Finally, compared with the traditional water-coal separation method, the comprehensive treatment cost of the method is obviously reduced, and meanwhile, the method increases extra economic benefit through recycling of coal resources and improves the overall economy of TBM tunneling operation. The device has compact structure and small occupied area, and all functional units are cooperatively matched to form a complete treatment-circulation system, so that the device is convenient to deploy and maintain on the mine site, is simple and convenient to operate and is easy to manage.

It is important that the foregoing detailed description of the present invention is that while the accompanying drawings and claims have been described in such detail as to illustrate the present invention, and not to limit the scope of the invention, it will be understood by those skilled in the art that the present invention can be modified and substituted for the same.

Claims (10)

1. A water-coal separation device matched with the TBM is characterized by comprising,

The separation unit (1) comprises a guide shell (11), a stirring assembly (12) fixed at the top of the guide shell (11) and a first transportation assembly (13) arranged inside the guide shell (11);

The sedimentation unit (2) comprises a dosing tank (21) arranged at the bottom of the diversion shell (11), a mixing tank (22) arranged at the bottom of the dosing tank (21), a first sedimentation tank (23) arranged at one side of the dosing tank (21) and the mixing tank (22), a second sedimentation tank (24) arranged at one side of the first sedimentation tank (23), pumping assemblies (25) respectively communicated between the mixing tank (22) and the first sedimentation tank (23) and between the first sedimentation tank (23) and the second sedimentation tank (24), and a collecting pipe (26) communicated between the first sedimentation tank (23) and the second sedimentation tank (24), and a second conveying assembly (27) arranged inside the first sedimentation tank (23).

2. The water-coal separation device matched with the TBM after the TBM, which is characterized in that:

Also comprises a supporting unit (3) which comprises a bottom plate (31), a pair of long plates (32) and a pair of short plates (33) fixed on the periphery of the bottom plate (31), a transverse plate (34) fixed between the pair of long plates (32), and a plurality of supporting seats (35) fixed on the upper surface of the bottom plate (31), and

The electromagnetic valves (4) are respectively fixed at the bottom of the dosing box (21) and below the side wall of the first sedimentation box (23).

3. The water-coal separation device matched with the TBM after the TBM, which is characterized in that:

The guide shell (11) comprises a conveying port (111), an inclined plate (112) fixed at the bottom of the guide shell (11), a blanking port (113) arranged on one side of the inclined plate (112), a first shunt pipe (114) fixed at the top of the blanking port (113) and a second shunt pipe (115) fixed at the bottom of the blanking port (113);

the sections of the first shunt pipe (114) and the second shunt pipe (115) are arc-shaped, and dense filter openings (M) are formed in the bottoms of the first shunt pipe and the second shunt pipe;

The stirring assembly (12) comprises a character plate (121), a first motor (122) fixed on the upper surface of the character plate (121), a rocking disc (123) fixed on the shaft end of the first motor (122), a connecting rod (124) hinged on one side of the rocking disc (123), and a piston plate (125) hinged on the other end of the connecting rod (124);

the table-shaped plate (121) comprises a movable groove (1211) formed in the top of the table-shaped plate and a limit cylinder (1212) fixed to the bottom of the movable groove (1211);

The rocker plate (123) includes a rocker arm (1231) fixed to one side surface thereof;

The piston plate (125) includes a piston post (1251) secured to a bottom thereof;

The first transportation assembly (13) comprises an L-shaped plate (131), a second motor (132) fixed on the surface of the L-shaped plate (131), a first screw rod (133) fixed on the shaft end of the second motor (132), a first belt pulley (134) fixed on the shaft body of the first screw rod (133), a second screw rod (135) arranged around the first screw rod (133), a second belt pulley (136) fixed on the shaft body of the second screw rod (135), and a belt (137) matched with the first belt pulley (134) and the second belt pulley (136).

4. A water-coal separation device in combination with a TBM as claimed in claim 3 wherein:

The dosing tank (21) comprises a water injection pipe (211) fixed at the top of the dosing tank, and a first water outlet pipe (212) fixed at the bottom of the dosing tank (21);

the mixing box (22) comprises a second outlet pipe (221) fixed at the bottom thereof.

5. The water-coal separation device matched with the TBM after the TBM, which is characterized in that:

The first settling tank (23) comprises a third water outlet pipe (231) fixed at the bottom of the side wall of the first settling tank (23), a settling tank (232) arranged at one side of the bottom of the first settling tank (23) and adjacent to the third water outlet pipe (231), a sealing pipe (233) fixed at one side of the settling tank (232) and extending obliquely, a sealing cover (234) fixed at the opening of the sealing pipe (233), a plurality of spoilers (235) fixed at the side wall of the first settling tank (23), and a plurality of pairs of mounting grooves (236) arranged at the top of the first settling tank (23);

The sealing cover (234) comprises a discharge hole (2341) formed in the side wall of the sealing cover, a driving pipe (2342) fixed to the side wall of the sealing cover (234), and a straight plate (2343) fixed to the side wall of the sealing cover (234);

The second sedimentation tank (24) comprises a plurality of mounting holes (241) formed in the side wall of the second sedimentation tank, a drain pipe (242) fixed on the side wall of the second sedimentation tank (24) and extending to the outside, and a fourth water outlet pipe (243) fixed at the bottom of the second sedimentation tank (24);

The drain pipe (242) comprises an overflow groove (2421) which is arranged on the side wall of the drain pipe and faces upwards.

6. The water-coal separation device matched with the TBM after the TBM, which is characterized in that:

the collecting pipe (26) comprises a water collecting groove (261) which is arranged on the pipe wall of the collecting pipe, and the collecting pipe (26) is communicated at one side;

The second conveying assembly (27) comprises a third screw rod (271), a separation plate (272) and a worm wheel (273) which are fixed on one end of a rod body of the third screw rod (271), a third motor (274) fixed on the surface of the straight plate (2343), and a worm (275) fixed on the shaft end of the third motor (274).

7. The water-coal separation device matched with the TBM after the TBM, which is characterized in that:

The pumping assembly (25) comprises a sludge pump (251), a first connecting pipe (252) fixed at the inlet of the sludge pump (251), a second connecting pipe (253) fixed at the outlet of the sludge pump (251), and a shunt pipe (254) fixed at the tail end of the second connecting pipe (253);

The shunt tube (254) comprises a plurality of shunt ports (2541) which are arranged on the side wall of the shunt tube and face downwards.

8. A method for recycling water-coal separation matched with a TBM (Tunnel boring machine) after the TBM is characterized by comprising the following steps:

introducing a water-coal mixture formed by high-pressure water coal cutting during coal receiving in a TBM tunneling process into a separation unit (1), respectively conveying recovered coal and gangue to corresponding shunt pipelines by a density difference separation principle, and introducing a mixed solution consisting of fine-fraction materials and water into a precipitation unit (2);

Adding a flocculating agent into the mixed solution, separating out sediment and supernatant fluid through multistage precipitation treatment, discharging the sediment, and collecting the supernatant fluid;

and conveying the supernatant to a water jet system in a TBM tunneling system for recycling.

9. The recycling method for separating water from coal, which is matched with the TBM, according to claim 8, wherein the recycling method comprises the following steps:

the separation unit (1) comprises a diversion shell (11) and a stirring assembly (12), and the corresponding diversion pipeline comprises a first diversion pipe (114) and a second diversion pipe (115);

the water-coal mixture generated by high-pressure water injection and coal cutting in the TBM tunneling process is led into a separation unit (1), specifically, the water-coal mixture is led into the diversion shell (11) through a conveying port (111);

the reclaimed coal and the gangue are respectively conveyed to the corresponding shunt pipelines through a density differential separation principle, specifically, the stirring assembly (12) is started to generate liquid level fluctuation, so that the reclaimed coal floats to the upper layer and enters the first shunt pipe (114), and the gangue is settled and enters the second shunt pipe (115) through the blanking port (113).

10. The recycling method for separating water from coal, which is matched with the TBM, according to claim 9, wherein the recycling method comprises the following steps:

The mixed solution composed of the fine-fraction material and water is led into a precipitation unit (2), specifically, the fine-fraction material and the water flow into the precipitation unit (2) through a filtering port (M);

the sedimentation unit (2) comprises a dosing box (21), a mixing box (22), a first sedimentation box (23) and a second sedimentation box (24);

The flocculant is added into the mixed liquid, specifically, the flocculant is added into the dosing tank (21) through a water injection pipe (211), and flows into the mixing tank (22) through a first water outlet pipe (212) to be mixed with the mixed liquid;

The sediment and the supernatant are separated through multistage sedimentation treatment, specifically, the mixed liquid is conveyed to the first sedimentation tank (23) through a pumping assembly (25) for primary sedimentation, and the supernatant flows into the second sedimentation tank (24) through a collecting pipe (26) for secondary sedimentation;

and conveying the supernatant to a TBM process water jet system for recycling, namely collecting clear water overflowed from a drain pipe (242) of the second settling tank (24), and returning the clear water meeting the water quality requirement to the TBM process water jet system.