CN204602792U - For the drip washing prosthetic device that agriculture heavy-metal contaminated soil is repaired - Google Patents

Abstract

The utility model discloses a rinsing restoration device for restoration of agricultural heavy metal polluted soil, which adopts a reliable process chain to complete continuous and thorough restoration of heavy metal polluted soil. The utility model comprises a first screw conveyor, a primary screening separator, a fine screening separator, an acid adding stirring tank, a centrifuge, a sewage tank, an alkali adding stirring tank, a sedimentation tank and a filter press which are sequentially connected in series; The drying tube of the drying component is connected with a gas pipe, and the far end of the gas pipe goes deep into the adsorption box filled with activated carbon, and an air pump and a constant flow valve are installed on the gas pipe in sequence; the liquid phase outlet of the filter press is connected to the return flow barrel, the return barrel is connected to the final purification column of the recovery liquid through a pipeline; the outlet of the final purification column of the recovery liquid is connected to the liquid storage tank through a pipeline, and a hose is connected to the liquid storage tank, and the liquid delivery tank is installed on the hose Pump, the far end of the hose extends into the hopper of the primary screening separator, and the end of the hose is installed with an atomizing nozzle.

Description

Leaching and remediation device for remediation of agricultural heavy metal-contaminated soil

technical field

The utility model relates to the field of repairing polluted soil, in particular to a repairing device for repairing agricultural heavy metal polluted soil by means of rinsing.

Background technique

Agricultural heavy metal polluted soil has brought disasters to agricultural production and land use. People have been trying their best to repair the soil in various ways. In traditional soil restoration, the recycling after simple chemical spraying is very unreliable. On the one hand, the soil There is no thorough purification. On the other hand, the mixture of treated soil and liquid is not used reliably. Specifically, the treated soil cannot be dried directly, and the treated liquid is discharged indiscriminately, polluting the environment. The entire treatment system was promoted when it was promoted. There are big obstacles.

Utility model content

The technical problem to be solved by the utility model is to provide a rinsing and repairing device for agricultural heavy metal-contaminated soil remediation in view of the deficiencies in the above-mentioned prior art, which uses a reliable process chain to complete the continuous and thorough remediation of heavy metal-contaminated soil; The treated liquid can be reliably purified and then refluxed for reuse, and the overall environmental benefit is high.

The technical solution adopted by the utility model to solve the technical problem is: a leaching repair device for agricultural heavy metal contaminated soil repair, including a first screw conveyor connected in series, a primary screen separator, a fine screen separator, an acid adding Stirring tank, centrifuge, sewage tank, alkali-adding stirring tank, sedimentation tank and filter press; the liquid phase outlet of the centrifuge is connected to the sewage tank, and the solid phase outlet of the centrifuge is set at the inlet of the drying component The discharge port of the drying assembly is provided with a second screw conveyor; the drying cylinder of the drying assembly is connected with an air pipe, and the far end of the air pipe goes deep into the adsorption box filled with activated carbon, and the air pipe is also installed in sequence With air pump and constant flow valve;

The sewage tank is connected to the alkali-adding stirring tank through the mud pump; the sedimentation tank is a four-stage sedimentation tank connected in series, and the last stage sedimentation tank of the four-stage series sedimentation tank is connected to a filter press, and the liquid phase outlet of the filter press is connected to The return barrel, the solid phase outlet of the filter press is provided with the input end of the third screw conveyor, and the output end of the third screw conveyor is connected to the input end of the first screw conveyor;

The return barrel is connected to the final purification column of the recovered liquid through a pipeline, and a constant flow pump is installed on the pipeline; the outlet of the final purification column of the recovered liquid is connected to the liquid storage tank through a pipeline, and a hose is connected to the liquid storage tank. A liquid delivery pump is installed on the hose, the far end of the hose extends into the feeding hopper of the primary screening separator, and an atomizing nozzle is installed at the end of the hose.

Further, the primary screening separator includes a rinsing mechanism installed on the bracket; the rinsing mechanism includes a horizontally fixed drum; one end of the drum is a feeding hopper, and the bottom of the feeding hopper communicates with the inside of the drum to form a feeding warehouse; inside the drum, there is a pusher shaft along the axial center of the drum, on which a feeding propeller is arranged, and on the pusher shaft there are evenly distributed sticks, and the two ends of the pusher shaft rotate Installed on the bracket, one end of the rotating shaft is connected with a pusher motor through a coupling; the whole bracket is set obliquely; the whole drum is trumpet-shaped; the end of the drum far away from the feeding hopper is provided with a discharge port ;

The final purification column of the recovered liquid is sequentially connected with an ion exchange column for absorbing heavy metal ions, an activated carbon column and a sterilization material purification column.

Further, the drying assembly includes a cylindrical structure of a liquid discharge cylinder and a drying cylinder, the liquid discharge cylinder and the drying cylinder are connected and connected through a flange seal, and the docking side of the liquid discharge cylinder and the drying cylinder is open , the other side is the end cover; the side of the liquid discharge cylinder is installed with a deceleration motor, the output shaft of the deceleration motor is connected to the propulsion shaft, and the two ends of the propulsion shaft are respectively rotated and installed on the end caps of the liquid discharge cylinder and the drying cylinder; A screw propeller for sending the soil from the washing cylinder to the drying cylinder and discharged from the outlet of the drying cylinder is made; the top of the end cover side of the above-mentioned liquid discharge cylinder is provided with a feed port; the open of the above-mentioned liquid discharge cylinder The inner wall on one side of the mouth is made with a ramp that makes the diameter of the liquid discharge cylinder gradually smaller; the bottom of the initial end of the ramp is connected to make a liquid recovery tank; the outlet of the liquid recovery tank is connected to the alkali-adding stirring tank through a pipeline; A heater is installed in the drying cylinder.

Compared with the prior art, the utility model has the following advantages:

The utility model comprises a first screw conveyor, a primary screening separator, a fine screening separator, an acid-adding stirring tank, a centrifuge, a sewage tank, an alkali-adding stirring tank, a sedimentation tank and a filter press which are sequentially connected in series; The new type uses primary sieve leaching and fine sieve leaching to separate the heavy metal ions and other pollutants in the soil from the soil into the water. After two-stage acid pool oxidation, the metal ions are combined with the anions in the acid and then melted into the water. The water containing pollutants and the mud from which pollutants have been removed are separated by a centrifuge; the water containing pollutants is separated from the sewage in the form of precipitation after being reduced by an alkali pool, and the sediment is flocculated and then enters After sedimentation in the fourth-stage sedimentation tank, solid-liquid separation is carried out. The separated water can be recycled for primary sieve rinsing and fine sieve rinsing. After the solids containing pollutants are discharged, they are sent to the filter press for recovery. The water containing a small amount of pollutants is sent back to the sewage tank for retreatment and separation. The above-mentioned process realizes the thorough and continuous treatment of heavy metal-contaminated soil, and the solid and liquid are treated separately, and finally can be directly used in the environment in a harmless manner;

The utility model is also equipped with a drying component at the solid phase outlet of the centrifuge. The drying component will dry the treated soil thoroughly and use it directly. At the same time, we will also pass the gas generated in the soil during drying The air pipe connected to the cylinder is used for treatment, and the far end of the air pipe goes deep into the adsorption box filled with activated carbon. The air pipe is also installed with an air pump and a constant flow valve in order to ensure harmless discharge and also to purify the soil again;

The return barrel of the utility model is connected to the final purification column of the recovered liquid through a pipeline, and a constant flow pump is installed on the pipeline; the outlet of the final purification column of the recovered liquid is connected to the liquid storage tank through a pipeline, and a hose is connected to the liquid storage tank , the liquid delivery pump is installed on the hose, the far end of the hose extends into the feeding hopper of the primary screen separator, and the end of the hose is installed with an atomizing nozzle; in this way, the whole liquid purification and washing process is Completely harmless recycling can be thoroughly purified and then sprayed and rinsed again;

The primary screening separator of the utility model adopts a drum structure as a mixing container, and the pusher shaft pushes the contaminated soil sprayed with eluent along the horizontal direction through the propeller, depending on the inclination of the drum itself and the bell mouth structure of the drum. Advance towards the direction of the discharge hopper, the advance process is fully mixed and stirred by the propeller and the breaking roller to carry out a full chemical reaction; the efficiency is very high;

When the liquid in the reflux barrel of the utility model is sent to the recovery liquid final purification column for purification and recovery, it is transported by a constant current pump, and the constant current transmission makes the purification and adsorption effect of the recovery liquid final purification column more stable and enhances the adsorption capacity;

The drying assembly of the utility model can squeeze the final residual liquid through the ramp structure of the liquid discharge cylinder and discharge it into the liquid recovery tank, and then carry out further treatment and finally carry out further purification treatment.

Description of drawings

Fig. 1 is the structural representation of a kind of specific embodiment of the utility model;

Fig. 2 is the structural representation of a kind of embodiment of primary screening separator;

Fig. 3 is a schematic structural view of a specific embodiment of the drying assembly.

Explanation of reference signs:

1-screw conveyor, 2-primary screen separator, 3-liquid storage tank, 4-fine screen separator, 5-acid mixing tank, 6-sewage tank, 7-centrifugal separator, 8-alkali mixing tank , 9-sedimentation tank, 10-reflux bucket, 11-filter press, 12-constant flow pump, 13-final purification column of recovered liquid, 14-liquid delivery pump, 15-atomizing nozzle, 16-drying component, 17 - adsorption box;

101-bracket, 102-feeding hopper, 103-feeding shaft, 104-discharge port, 105-valve plate, 106-roller, 107-feeding bin, 108-pushing motor, 110-feeding propeller, 111-beat Scattered stick;

206-feed inlet, 207-drain tube, 208-flange, 209-drying tube, 210-heater, 211-propeller propeller, 212-propulsion shaft, 213-reduction motor, 214-bracket, 215- Liquid recovery tank, 216-ramp, 217-outlet.

Detailed ways

Describe the specific implementation of the utility model below in conjunction with accompanying drawing and embodiment:

As shown in Figures 1 to 3, it shows a specific embodiment of the present invention. The leaching and repairing device of the present invention is used for the restoration of agricultural heavy metal polluted soil, which includes a first screw conveyor, an initial Sieve separator 2, fine sieve separator 4, acid-adding stirring tank 5, centrifuge 7, sewage tank 6, alkali-adding stirring tank 8, sedimentation tank 9 and filter press 11; the liquid phase outlet of the centrifuge is connected to sewage pool, the solid phase outlet of the centrifuge is set at the feed port of the drying assembly; the second screw conveyor is provided at the discharge port of the drying assembly; the drying cylinder of the drying assembly is connected with a gas pipe, The far end of the trachea goes deep into the adsorption box filled with activated carbon 17, and an air suction pump and a constant flow valve are sequentially installed on the trachea;

As shown in the figure, the sewage tank is connected to the alkali-adding stirring tank through the mud pump; the sedimentation tank is a four-stage sedimentation tank connected in series, and the last stage sedimentation tank of the four-stage sedimentation tank is connected to a filter press, and the filter press The liquid phase outlet of the filter press is connected to the return barrel 10, and the solid phase outlet of the filter press is provided with an input end of a third screw conveyor, and the output end of the third screw conveyor is connected to the input end of the first screw conveyor;

As shown in the figure, the reflux barrel is connected to the recovery liquid final purification column 13 through a pipeline, and a constant flow pump 12 is installed on the pipeline; the outlet of the recovery liquid final purification column is connected to the liquid storage tank 3 through a pipeline A flexible pipe is connected to the liquid reservoir, a liquid delivery pump is installed on the flexible pipe, the far end of the flexible pipe stretches into the feeding hopper of the primary screening separator, and an atomizing nozzle 15 is installed at the end of the flexible pipe.

Preferably, as shown in the figure, the primary screening separator includes a rinsing mechanism installed on a support 101; the rinsing mechanism includes a horizontally fixed drum 106; one end of the drum is a hopper 102, and the bottom end of the hopper is It communicates with the inside of the drum to form a feeding bin 107; inside the drum, a pushing shaft 103 is arranged along the axial center of the drum, and a feeding propeller 110 is arranged on the pushing shaft, and a breaker is evenly distributed on the pushing shaft. Rod 111, the two ends of the pushing shaft are installed on the support by rotation, and one end of the rotating shaft is connected with the pushing motor 108 through a coupling; the whole support is inclined; the whole drum is trumpet-shaped; A discharge port 104 is arranged on the end of one end of the hopper;

As shown in the figure, the final purification column of the recovered liquid is sequentially connected with an ion exchange column for absorbing heavy metal ions, an activated carbon column and a sterilization material purification column.

Preferably, as shown in the figure, the drying assembly includes a cylindrical structure of a liquid discharge cylinder 207 and a drying cylinder 209, the liquid discharge cylinder and the drying cylinder are connected and connected through a flange 208, and the liquid discharge cylinder and the drying cylinder One side of the butt joint is open, and the other side is an end cover; a deceleration motor 213 is installed on the side of the liquid discharge cylinder, the output shaft of the deceleration motor is connected to the propulsion shaft 212, and the two ends of the propulsion shaft are respectively rotated and installed on the liquid discharge cylinder and the drying cylinder. On the end cover of the above-mentioned propulsion shaft, there is a screw propeller 211 for sending the soil from the washing cylinder to the drying cylinder and discharging the discharge port of the drying cylinder; the top of the end cover side of the above-mentioned liquid discharge cylinder is opened Feed inlet 206; the inner wall of the open side of the above-mentioned liquid discharge cylinder is made with a ramp 216 that makes the diameter of the liquid discharge cylinder gradually smaller; the bottom of the initial end of the ramp is connected to make a liquid recovery tank; the liquid recovery The outlet of groove is connected to alkali-adding stirring tank by pipeline; Heater 210 is installed in the above-mentioned drying cylinder.

The preferred embodiment of the utility model has been described in detail above in conjunction with the accompanying drawings, but the utility model is not limited to the above-mentioned embodiment. Make various changes.

Many other changes and modifications can be made without departing from the spirit and scope of the present invention. It should be understood that the invention is not limited to specific embodiments, and the scope of the invention is defined by the appended claims.

Claims (3)

1., for the drip washing prosthetic device that agriculture heavy-metal contaminated soil is repaired, it is characterized in that: comprise be connected in series successively the first conveying worm, primary dcreening operation seperator, dusting cover seperator, acid adding stirring pool, centrifugal separator, cesspool, add alkali stirring pool, sedimentation basin and filter press; The liquid-phase outlet of centrifugal separator connects cesspool, and the solid-phase outlet of centrifugal separator is arranged on the charging aperture place of drying assembly; The discharge outlet of drying assembly is provided with the second conveying worm; The Drying of described oven dry assembly is communicated with tracheae, and the far-end of tracheae, deeply in the adsorption box being filled with active carbon, tracheae is also provided with aspiration pump and permanent flow valve successively;

Described cesspool connects through slush pump and adds alkali stirring pool; Sedimentation basin is the sedimentation basin of level Four series connection, the afterbody sedimentation basin of the sedimentation basin of level Four series connection connects filter press, the liquid-phase outlet of described filter press connects backflow bucket, filter press solid-phase outlet is provided with the input of the 3rd conveying worm, and the output of described 3rd conveying worm is connected to the input of described first conveying worm;

Described backflow bucket is connected on Ethylene recov final purification post by pipeline, and this pipeline is provided with constant flow pump; The outlet of described Ethylene recov final purification post is connected in liquid storage tank by pipeline, and connecting hose on liquid storage tank, liquid-feeding pump installed by this flexible pipe, and the far-end of this flexible pipe stretches in the loading hopper of primary dcreening operation seperator, and atomizer is installed in the termination of flexible pipe.

2. the drip washing prosthetic device repaired for agriculture heavy-metal contaminated soil as claimed in claim 1, is characterized in that: described primary dcreening operation seperator comprises rack-mount drip washing mechanism; Described drip washing mechanism comprises the hard-wired cylinder of level; One end of cylinder is loading hopper, and loading hopper bottom is communicated with drums inside, forms feeding storehouse; In described cylinder, cylinder axial centre is provided with pusher shaft, pusher shaft is furnished with feeding screw slurry, on pusher shaft, also uniform being provided with breaks up rod simultaneously, and described pusher shaft two ends are rotatably installed on support, and one end of turning cylinder is connected with pusher motor by shaft coupling; The integral inclined setting of described support; Described cylinder entirety is horn-like; End away from one end of loading hopper arranges discharge gate to described cylinder;

Ion exchange column, activated-charcoal column and the sterilization material decontaminating column for absorbing heavy metal ion is connected successively in described Ethylene recov final purification post.

3. the drip washing prosthetic device repaired for agriculture heavy-metal contaminated soil as claimed in claim 1 or 2, it is characterized in that: described oven dry assembly comprises discharge opeing cylinder and the Drying of cylindrical structure, discharge opeing cylinder is communicated with docking with Drying by flange seal, the docking side of discharge opeing cylinder and Drying is uncovered, and opposite side is end cap; Reducing motor is installed in the side of discharge opeing cylinder, and the output shaft of reducing motor connects cardan shaft, and cardan shaft two ends are rotatably installed on the end cap of discharge opeing cylinder and Drying respectively; Above-mentioned cardan shaft is manufactured with for earth being delivered to Drying by drip washing cylinder and discharging the screw propeller of the discharging opening of Drying; Charging aperture is offered at the top of the end cap side of above-mentioned discharge opeing cylinder; The inwall of the uncovered side of above-mentioned discharge opeing cylinder is manufactured with the ramp that the diameter of discharge opeing cylinder is diminished gradually; The bottom of the initiating terminal in ramp is communicated with making liquid recovery; The outlet of described liquid recovery is connected to by pipeline and adds alkali stirring pool; In above-mentioned Drying, heater is installed.