CN110655215B - Treatment unit for oily sewage - Google Patents

Abstract

The invention relates to the field of sewage treatment, and discloses a treatment device for oily sewage, wherein an oil discharge mechanism (2) is arranged in a sedimentation tank (1) and located above a water inlet pipe (102), and the oil discharge mechanism (2) It includes an oil scraper (201), an oil receiving box (202) and a horizontally arranged conveyor belt (203). 1) An oil discharge pipe (204) is arranged on the side wall, and the oil receiving box (202) is arranged below one end of the conveyor belt (203) and communicates with the oil discharge pipe (204); the oil scraper (201) is arranged on the oil receiving box (202) ) and one end is fixed on the inner wall of the sedimentation tank (1), and the other end is attached to the end of the conveyor belt (203). The invention can effectively remove the oil in the sewage by arranging the oil discharge mechanism on the upper part of the sedimentation tank, so as to achieve an ideal sewage oil removal effect.

Description

Treatment unit for oily sewage

technical field

The invention relates to the field of sewage treatment, in particular to a sewage treatment device.

Background technique

Sewage treatment process is a variety of economical, reasonable, scientific and effective process methods for urban domestic sewage and industrial wastewater. Sewage treatment is widely used in construction, agriculture, transportation, energy, petrochemical, environmental protection, urban landscape, medical, catering and other fields. The urban sewage treatment process should be determined according to the treatment scale, water quality characteristics, environmental functions of the receiving water body, and local actual conditions and requirements, after comprehensive technical and economic comparison.

The general sewage treatment process includes steps such as water intake, aeration, sedimentation, and drainage. The sedimentation step is generally carried out in a sedimentation tank, which mainly realizes the separation of mud and water, and the separated water and mud are both recycled and reused. The current sedimentation tanks generally use the bottom to collect the sludge and discharge it through the sludge discharge pipe arranged at the bottom of the sedimentation tank. During the actual sludge discharge process, it is difficult to separate the mud and water, and the sludge is easy to accumulate in the sludge discharge port, but it is difficult to discharge the sludge discharge port in time. , resulting in unsatisfactory sludge discharge effect, and it is difficult to discharge more comprehensively.

SUMMARY OF THE INVENTION

Aiming at the problems existing in the sewage treatment process in the prior art, the present invention provides a treatment device for oily sewage.

In order to solve the above-mentioned technical problems, the present invention is solved by the following technical solutions:

The treatment device for oily sewage includes a sedimentation tank with a sludge discharge pipe, a water inlet pipe is arranged on the upper part of the sedimentation tank, and an oil discharge mechanism is arranged in the sedimentation tank and above the water inlet pipe. The oil box and the conveyor belt arranged horizontally. The two sides of the conveyor belt in the width direction are matched with the front and rear side walls of the sedimentation tank. The side wall of the sedimentation tank is provided with an oil discharge pipe. The oil receiving box is arranged below one end of the conveyor belt and communicated with the oil discharge pipe. ; The oil scraper is arranged above the oil receiving box and one end is fixed on the inner wall of the sedimentation tank, and the other end is attached to the end of the conveyor belt.

Preferably, the oil receiving box is a rectangular housing including a bottom plate, a rear side plate and left and right side plates. The rear side plate is provided with a groove with an upper end opening for the conveyor belt to be inserted into, and the end of the conveyor belt extends into the oil receiving box through the groove. Inside; the end of the oil receiving box opposite to the rear side plate is fixed on the side wall of the sedimentation tank. The structure of the oil receiving box and the conveyor belt can make the oil from the end of the conveyor belt or both sides of the conveyor belt fall into the oil receiving box, so as to improve the oil removal effect.

Preferably, the thickness of the oil scraper from the middle of the oil scraper to the end of the oil scraper that is attached to the conveyor belt gradually decreases, and the end of the oil scraper that is attached to the conveyor belt is provided with a plurality of uniformly arranged along the width direction of the oil scraper. The channel through which the oil supply passes. The structure of the oil scraper can make it more effective to scrape the oil on the conveyor belt, and the through groove can make the oil scraped by the oil scraper fall into the oil receiving box through it, which is convenient for the collection of oil pollution.

A treatment device and method for oily sewage, including a sedimentation tank provided with a sludge discharge pipe, a water inlet pipe is arranged on the upper part of the sedimentation tank, a sludge discharge mechanism connected with the sludge discharge pipe is arranged in the sedimentation tank, and the sludge discharge mechanism includes a horizontal arrangement. One end of the mud storage pipe is fixed on the inner side wall of the sedimentation tank, and the other end is connected with the mud discharge pipe. The upper side wall of the mud storage pipe is provided with a mud storage pipe along the The mud inlet extends in the length direction and the opening is upward. The lower ends of the two mud guide plates are respectively fixed on both sides of the mud inlet, and the side wall of the mud storage pipe is inserted with a rotatable baffle that is coaxial with the mud storage pipe. The mud pipe, the side wall of the mud guard pipe is provided with a mud passing port which can cooperate with the mud inlet; There is a tie rod that can extend out of the mud discharge pipe.

The sludge is deposited through the sludge storage pipe. The precipitated sludge is first stored in the sludge storage pipe, and then pulled out by the scraper to avoid the blockage caused by the accumulation of sludge at the outlet of the sludge discharge pipe. Fully discharge the sludge to achieve a better sludge discharge effect.

Preferably, the mud scraper includes a sliding plate and a rotating plate, both of which are composed of two fan-shaped plates. The sliding plate and the rotating plate can be jointly constructed as a circular plate with the outer side wall and the inner wall of the mud storage pipe clearance fit, and the rotating plate is fixed at the end of the tie rod. The sliding plate is sleeved on the tie rod and is located between the rotating plate and the end of the tie rod extending out of the mud discharge pipe. The inner wall of the mud storage pipe is provided with a limit chute arranged along the length of the mud storage pipe, and the sliding plate The two arc surfaces of the rotary plate are provided with limit bumps that can slide in the limit chute, an arc surface of the rotating plate is provided with a bayonet that can fully retract into the rotating plate, and the inner wall of the mud storage pipe There are two card slots matched with the card pins.

Preferably, an accommodating groove for completely accommodating the bayonet is provided on the curved surface of the rotating plate, the bayonet is arranged in the accommodating groove and is connected to the bottom surface of the accommodating groove by a spring, and the bayonet can extend under the action of the spring. Out of the accommodating slot, a first inclined guide surface is provided on the outer side wall of the protruding end of the bayonet pin, and a first inclined guide surface is provided on the side wall at the opening of the bayonet slot for the bayonet to be stuck in or out of the bayonet slot. Two inclined guide surfaces.

Preferably, the tie rod is also provided with a connecting rod connected to the mudguard pipe, the inner side wall of the mud storage pipe is provided with an arc-shaped chute for the connecting rod to slide, one end of the connecting rod is fixed on the outer side wall of the tie rod, and the other end passes through the The arc chute is fixed on the outer side wall of the mudguard pipe. The tie rod controls the mudguard pipe and the mud scraper at the same time, which effectively improves the final mud discharge efficiency. It is controlled by a tie rod at the same time, which is simple and convenient.

Preferably, the two clamping grooves are respectively arranged at the lower vertex and the left vertex of the mud storage pipe. When the bayonet is clamped into the clamping groove at the lower vertex of the mud storage pipe, the rotating plate and the sliding plate are vertically formed into a circular plate together with the longitudinal direction. The mud inlet is in the state of being closed by the mudguard pipe; when the bayonet is locked into the slot at the left vertex of the mud storage pipe, the rotating plate and the sliding plate are parallel to the length direction, and the mud inlet and the mud passage are in an open state.

Preferably, a plurality of drainage pipes arranged horizontally and parallel to each other in the same horizontal plane are arranged in the sedimentation tank. The drainage pipes are arranged on the upper part of the mud guide plate. It is fixed on the inner side wall of the sedimentation tank, and the other end extends out of the side wall of the sedimentation tank, and the extended ends are connected by a main water pipe, and the main water pipe is connected with a water outlet pipe. The drainage pipe adopts the method of draining water through the drainage hole and entering the drainage pipe for drainage. The whole drainage process is moderated, and the sludge deposited in the lower part of the sedimentation tank will not be stirred, so as to achieve the true separation of mud and water.

Preferably, the mud guide plate includes a screen plate with screen holes and a filter cloth fixedly laid on the screen plate, and a water storage chamber is formed between the mud guide plate and the lower bottom surface of the sedimentation tank. The mud-water mixture is first separated from the mud-water by the mud-guide plate, so that the mud on the upper part of the mud-guide plate is more quickly settled into the mud storage pipe, which accelerates the sludge precipitation and improves the treatment efficiency of the sedimentation tank.

The present invention has significant technical effects due to the adoption of the above technical solutions:

The invention can effectively remove the oil in the sewage by arranging the oil discharge mechanism on the upper part of the sedimentation tank, so as to achieve an ideal sewage oil removal effect.

Description of drawings

FIG. 1 is a schematic structural diagram of Embodiment 1 of the present invention.

FIG. 2 is a cross-sectional view of FIG. 1 .

FIG. 3 is a schematic structural diagram of the mud storage pipe in FIG. 2 .

FIG. 4 is a schematic structural diagram of the mudguard pipe in FIG. 2 .

FIG. 5 is a schematic view of the structure of the scraper in FIG. 2 .

FIG. 6 is a cross-sectional view of the rotating plate of FIG. 5 .

FIG. 7 is a schematic structural diagram of the oil discharge mechanism in FIG. 2 .

FIG. 8 is a schematic structural diagram of the oil scraper in FIG. 2 .

The names of the parts referred to by the numbers in the accompanying drawings are as follows: 1—sedimentation tank, 2—oil discharge mechanism, 3—mud discharge mechanism, 4—mud cover, 5—handle, 6—drainage pipe, 101—mud discharge Pipe, 102—water inlet pipe, 201—oil scraper, 202—oil receiving box, 203—conveyor belt, 204—oil drain pipe, 205—through groove, 301—mud storage pipe, 302—mud guide plate, 303—mud inlet , 304—Mudguard pipe, 305—Mud port, 306—Fender scraper, 307—Tie rod, 308—Sliding plate, 309—Rotating plate, 310—Limiting chute, 311—Limiting bump, 312—Card Pin, 313—card groove, 314—accommodating groove, 315—first inclined guide surface, 316—second inclined guide surface, 317—connecting rod, 318—arc chute, 319—screen plate, 320—filter Cloth, 321—water storage room, 401—slot, 601—drainage hole, 602—main water pipe, 603—water outlet pipe, 604—backwash water pump.

Detailed ways

The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

Example 1

The treatment device and method for oily sewage, as shown in Figures 1 to 8, includes a sedimentation tank 1 provided with a sludge discharge pipe 101, the upper part of the sedimentation tank 1 is provided with a water inlet pipe 102, and the sedimentation tank 1 is provided with The mud discharge mechanism 3 connected to the mud pipe 101, the mud discharge mechanism 3 includes a horizontally arranged mud storage pipe 301 and two mud guide plates 302 arranged obliquely downward. The front and rear side walls are jointly constructed into a conical mud storage chamber. One end of the mud storage pipe 301 is fixed on the inner side wall of the sedimentation tank 1, and the other end is connected to the mud discharge pipe 101. The upper side wall of the mud storage pipe 301 is provided with a mud storage pipe along the 301 The mud inlet 303 extends in the length direction and the opening is upward. The lower ends of the two mud guide plates 302 are fixed on both sides of the mud inlet 303 respectively. Shaft and rotatable mudguard pipe 304, the side wall of mudguard pipe 304 is provided with mud pass 305 which can cooperate with mud inlet 303; When the mud inlet 303 is open, after the mud-water mixture slowly settles, the sludge sinks and enters the mud storage pipe 301 through the mud guide plate 302 to be deposited.

The mud discharging mechanism 3 further includes a mud scraper 306 disposed in the mud storage pipe 301 and capable of moving along the length direction of the mud storage pipe 301 . The mud scraper 306 includes a sliding plate 308 and a rotating plate 309, both of which are composed of two fan-shaped plates. The sliding plate 308 and the rotating plate 309 can be configured together to form a circular plate with the outer side wall and the inner wall of the mud storage pipe 301 clearance fit. The rotating plate 309 It is fixed at the end of the pull rod 307, and the sliding plate 308 is sleeved on the pull rod 307 and located between the rotating plate 309 and the end of the pull rod 307 extending out of the mud discharge pipe 101. The inner wall of the mud storage pipe 301 is provided with a mud storage pipe along the The limit chute 310 is arranged in the length direction of the 301, the two arc surfaces of the sliding plate 308 are provided with limit bumps 311 that can slide in the limit chute 310, and an arc surface of the rotating plate 309 is provided with The locking pin 312 in the rotating plate 309 can be fully retracted, and two locking grooves 313 are provided on the inner wall of the mud storage pipe 301 , which are matched with the locking pin 312 .

During the precipitation process, the rotating plate 309 and the sliding plate 308 are in a parallel state. At this time, the arc surfaces of the two plates are arranged to the left and right, and the open sides of the two plates are arranged to be up and down. This state can facilitate the entry of sludge into the sludge storage pipe. 301, and in this state, the scraper 306 can be lowered and pushed to the innermost side of the mud storage pipe 301, so as to avoid pushing the sludge back to the mud storage pipe 301 during the pushing process, and improve the final sludge discharge efficiency.

After the muddy water in the sedimentation tank 1 has settled for a period of time, the sludge is deposited in the mud storage pipe 301. At this time, the sludge can be discharged through the mud scraper 306. First, the turning plate is rotated to a vertical position with the sliding plate 308, so that the rotating plate 309 and the sliding plate 308 together form a circular plate that fits with the inner wall of the mud storage pipe 301. At this time, the locking pin 312 is locked into the locking groove 313 located at the lower vertex of the mud storage pipe 301 to limit the rotating plate 309, and then Pull the tie rod 307 so that the circular plate pulls the sludge in the sludge storage pipe 301 to the sludge discharge pipe 101 to be discharged.

In addition, the sludge discharge plate is designed as a structure of two front and rear panels, the rotating plate 309 is fixed on the pull rod 307, and the sliding plate 308 is movably connected to the pull rod 307, so that during the process of pulling out the sludge, under the sludge reaction force The sliding plate 308 has a tendency to move backwards, so that the sliding plate 308 and the rotating plate 309 can be closely attached, reducing the outflow of sludge from the gap between the sliding plate 308 and the rotating plate 309, and pulling the sludge out to a greater extent , to improve the sludge discharge efficiency; in the process of pushing the scraper 306 to the inner side of the sludge storage pipe 301, the sliding plate 308 has a tendency to move forward under the action of the mud-water mixture, and the tie rod 307 is provided with a sliding plate 308 to carry out The axial limit stop block prevents the sliding plate 308 from moving too much on the pull rod 307. After the sliding plate 308 moves, there is a gap between the sliding plate 308 and the rotating plate 309. During the pushing of the mud scraper 306, the mud-water mixture moves toward On the one hand, it can move forward from the gap between the sliding plate 308 and the rotating plate 309, and on the other hand, it can flow from the gap between the sliding plate 308 and the rotating plate 309 to the front of the scraper 306, which is the next time. Pull out the sludge to prepare, and discharge the sludge more efficiently.

The curved surface of the rotating plate 309 is provided with an accommodating groove 314 that completely accommodates the bayonet 312. The bayonet 312 is arranged in the accommodating groove 314 and is connected to the bottom surface of the accommodating groove 314 through a spring. Under the action, the accommodating groove 314 can be extended. The outer side wall of the extended end of the card pin 312 is provided with a first inclined guide surface 315, and the side wall at the opening of the card groove 313 is provided with the first inclined guide surface 315 for clamping. The pin 312 is engaged or disengaged from the second inclined guide surface 316 of the engaging slot 313 . The cooperation of the first inclined guide surface 315 and the second inclined guide surface 316 can facilitate the locking of the pin 312 into and out of the locking slot 313 , and provide a prerequisite for the rotation and position limit of the rotating plate 309 . During the limiting process, the rotating plate 309 rotates to the position of the card slot 313, and the second inclined guide surface 316 on the card slot 313 acts on the first inclined guide surface 315 on the bayonet 312, so that the bayonet 312 overcomes the elastic force of the spring to retract into the capacity. When it is placed in the slot 314, when it reaches the position of the slot 313, it is stuck into the slot 313 under the action of the spring force to realize the limit of the rotating plate 309; The guide surface 316 acts on the first inclined guide surface 315 on the bayonet 312, so that the bayonet 312 overcomes the spring force to retract into the accommodating slot 314, and at the same time causes the bayonet 312 to deviate from the position of the bayonet slot 313, at this time, the rotation plate is released. 309 limit.

The pull rod 307 is also provided with a connecting rod 317 connected to the mudguard pipe 304 , the inner side wall of the mud storage pipe 301 is provided with an arc-shaped chute 318 for the connecting rod 317 to slide, and one end of the connecting rod 317 is fixed on the outer side wall of the pull rod 307 , and the other end is fixed on the outer side wall of the mudguard pipe 304 through the arc chute 318 . The two locking grooves 313 are respectively arranged at the lower vertex and the left vertex of the mud storage pipe 301. When the locking pin 312 is locked into the locking groove 313 at the lower vertex of the mud storage pipe 301, the rotating plate 309 and the sliding plate 308 are vertically formed together in the longitudinal direction. The circular plate and the mud inlet 303 are closed by the mudguard pipe 304; when the locking pin 312 is locked into the groove 313 at the left vertex of the mud storage pipe 301, the rotating plate 309 is parallel to the length direction of the sliding plate 308, and the mud inlet 303 is parallel to the length direction of the sliding plate 308. The mud passage 305 is relatively open.

The mudguard pipe 304 and the mud scraper 306 are simultaneously controlled by the rotation of the pull rod 307, so that the mud storage pipe 301 is in a closed state during the mud discharge process, and the mud storage pipe 301 is in an open state during the mud storage process, which effectively improves the final mud discharge efficiency. A pull rod 307 is controlled at the same time, which is simple and convenient.

In this embodiment, there are three limit chute 310 and clamping slot 313 in total, which are respectively arranged at the left vertex, right vertex and lower vertex of the mud storage pipe 301, wherein the limit chute 310 located at the left vertex is simultaneously The locking slot 313 is used for sliding the limiting projection 311 on the sliding plate 308 on the one hand, and also serves as a locking slot 313 for limiting the position of the locking pin 312 on the other hand.

The end face of the mud discharge pipe 101 is provided with a mudguard cover 4, and the end of the pull rod 307 extending out of the mud discharge pipe 101 passes through the mudguard cover 4 and is fixed with a handle 5. The handle 5 is provided with a rotation indicating arrow, and the mudguard cover 4 is provided with an opening indicating arrow and a closing indicating arrow which cooperate with the indicating arrow on the handle 5 and are used to indicate the opening and closing state of the mud opening 305 .

In addition, in this embodiment, a slot 401 is provided on the end face of the mud discharge pipe 101, and a plug that can be inserted into the slot 401 is provided on the mudguard cover 4, and the mudguard cover 4 is inserted into the slot 401 through the plug Mud pipe 101 is connected. On the one hand, the function of the mudguard cover 4 can play a blocking role in the mud storage process to achieve effective mud storage; on the other hand, it can also play a mud blocking role in the mud discharge process, reducing the mud splashing on the handle during mud discharging. 5 places. On the one hand, the connection between the mudguard cover 4 and the mud discharge pipe 101 can realize the quick closing and opening of the mudguard cover 4, and on the other hand, it can avoid the rotation of the mudguard cover 4, so that the indicating arrows on it can be clearly With the indication function, the operator can fully understand that the mud storage pipe 301 is in the open or closed state according to the indication arrow.

In this embodiment, a plurality of drainage pipes 6 arranged horizontally and parallel to each other in the same horizontal plane are arranged in the sedimentation tank 1. The drainage pipes 6 are arranged on the upper part of the mud guide plate 302. One end of the drain hole 601 and the drain pipe 6 are fixed on the inner side wall of the sedimentation tank 1, and the other end extends out of the side wall of the sedimentation tank 1 and the extended ends are connected by a main water pipe 602, and the main water pipe 602 is connected with a water outlet pipe 603. The water outlet pipe 603 is provided with a water outlet valve, and the end away from the main water pipe 602 is connected with a backwash water pump 604 .

In addition, the mud guide plate 302 includes a screen plate 319 with screen holes and a filter cloth 320 fixedly laid on the screen plate 319. A water storage chamber 321 is formed between the mud guide plate 302 and the bottom surface of the sedimentation tank 1 .

After the sedimentation tank 1 settles for a period of time, the sludge sinks, and the water in the upper part of the mud storage chamber can be discharged through the drainage pipe 6. The drainage process is to make the water in the sedimentation tank 1 reverse into the drainage pipe 6 through the drainage hole 601. , this kind of drainage method is relatively slow and gentle, will not cause the sludge in the sedimentation tank 1 to be stirred, and ensure the degree of sludge-water separation of the discharged water. The mud deflector 302 is designed as a screen plate 319 with a filter cloth 320, so that the mud-water mixture entering the sedimentation tank 1 during the sedimentation process first passes through the mud deflector 302 for a preliminary mud-water separation, and the mud on the upper portion of the mud deflector 302 is more concentrated. Quickly settle into the mud storage pipe 301 to speed up the sludge precipitation. After a period of precipitation, the water in the water storage chamber 321 slowly rises. During the rising process, the sludge has basically settled, and the mud and water will not be mixed again. Then slowly drain through the drain pipe 6 .

During the sedimentation process, the water outlet pipe 603 is provided with a water outlet valve in a closed state, and in an open state during the drainage process. After the sludge is discharged, when the interior of the sedimentation tank 1 needs to be cleaned, the backwash pump 604 can be used to make water enter the drain pipe 6, and the drain pipe 6, the mud guide plate 302 and the mud storage pipe 301 can be washed, and finally the washed sewage It is discharged through the sludge discharge pipe 101 to realize backwashing of the interior of the sedimentation tank 1 .

In this embodiment, an oil discharge mechanism 2 is provided in the sedimentation tank 1 and located above the water inlet pipe 102. The oil discharge mechanism 2 includes an oil scraper 201, an oil receiving box 202, and a horizontally arranged conveyor belt 203. The conveyor belt 203 is arranged in the width direction. Both sides are matched with the front and rear side walls of the sedimentation tank 1, and the side wall of the sedimentation tank 1 is provided with an oil discharge pipe 204. The oil receiving box 202 is arranged below one end of the conveyor belt 203 and communicates with the oil discharge pipe 204; the oil scraper 201 is arranged on the connecting One end of the oil box 202 is fixed on the inner wall of the sedimentation tank 1 , and the other end is attached to the end of the conveyor belt 203 .

The oil receiving box 202 is a rectangular casing including a bottom plate, a rear side plate and left and right side plates. The rear side plate is provided with a groove with an upper end open for the conveyor belt 203 to be inserted into, and the end of the conveyor belt 203 extends through the groove to receive the oil. In the box 202, the side wall of the groove is attached to the side wall of the conveyor belt 203, which can scrape oil without affecting the movement of the conveyor belt 203; the end of the oil receiving box 202 opposite to the rear side plate is fixed on the side wall of the sedimentation tank 1 superior. The thickness of the oil scraper 201 from the middle of the oil scraper 201 to the end of the oil scraper 201 that is attached to the conveyor belt 203 gradually decreases, and the end of the oil scraper 201 that is attached to the conveyor belt 203 is provided with a plurality of widths along the oil scraper 201 . The through grooves 205 through which the oil supply passes are arranged in a uniform direction.

After the sedimentation tank 1 has settled for a period of time, the sludge in it sinks and the oil-water mixture rises. Due to the different density of oil and water, the oil floats on the water surface. At this time, the oil can be drained first and then drained. The conveyor belt 203 rotates, and the material of the conveyor belt 203 is a material that can adhere the oil on the surface but does not absorb the oil into it. During the rotation of the conveyor belt 203, the floating oil is adhered to the surface of the conveyor belt 203 until it is transported to the oil scraper 201. At this point, under the action of the oil scraper 201, the oil on the surface of the conveyor belt 203 is scraped off, and part of the scraped oil falls into the oil receiving box 202 through the through groove 205 on the oil scraper 201, and the other part is pushed to the The two sides of the conveyor belt 203 then fall into the oil receiving box 202 along the side of the conveyor belt 203, and then the oil is collected in the oil receiving box 202, and finally discharged through the oil discharge pipe 204 to achieve the purpose of removing oil in the sewage.

In a word, the above are only preferred embodiments of the present invention, and all equivalent changes and modifications made according to the scope of the patent application of the present invention shall fall within the scope of the patent of the present invention.

Claims (5)

1. A processing apparatus for oily sewage, including sedimentation tank (1) that is equipped with sludge discharge pipe (101), the upper portion of sedimentation tank (1) is equipped with inlet tube (102), its characterized in that: an oil discharge mechanism (2) is arranged in the sedimentation tank (1) and above the water inlet pipe (102), the oil discharge mechanism (2) comprises an oil scraping plate (201), an oil receiving box (202) and a conveying belt (203) which is horizontally arranged, the two sides of the conveying belt (203) in the width direction are in clearance fit with the front side wall and the rear side wall of the sedimentation tank (1), an oil discharge pipe (204) is arranged on the side wall of the sedimentation tank (1), and the oil receiving box (202) is arranged below one end of the conveying belt (203) and is communicated with the oil discharge pipe (204); the oil scraping plate (201) is arranged above the oil receiving box (202), one end of the oil scraping plate is fixed on the inner wall of the sedimentation tank (1), and the other end of the oil scraping plate is attached to the end part of the conveyor belt (203);

the oil receiving box (202) is a rectangular shell comprising a bottom plate, a rear side plate, a left side plate and a right side plate, a groove with an opening at the upper end for the clamping of the conveyor belt (203) is formed in the rear side plate, and the end part of the conveyor belt (203) penetrates through the groove and extends into the oil receiving box (202); the end part of the oil receiving box (202) opposite to the rear side plate is fixed on the side wall of the sedimentation tank (1);

the sludge discharging mechanism (3) connected with the sludge discharging pipe (101) is arranged in the sedimentation tank (1), the sludge discharging mechanism (3) comprises a transversely-arranged sludge storing pipe (301) and two sludge guide plates (302) which are arranged in a downward inclined manner, one end of the sludge storing pipe (301) is fixed on the inner side wall of the sedimentation tank (1), the other end of the sludge storing pipe is connected with the sludge discharging pipe (101), a sludge inlet (303) which extends along the length direction of the sludge storing pipe (301) and has an upward opening is formed in the upper side wall of the sludge storing pipe (301), the lower ends of the two sludge guide plates (302) are respectively fixed on two sides of the sludge inlet (303), a sludge blocking pipe (304) which is coaxial with the sludge storing pipe (301) and can rotate is inserted in the side wall of the sludge storing pipe (301), and a sludge passing port (305) which can be matched with the sludge inlet (303) is formed in the side wall of the sludge blocking pipe (304); the mud discharging mechanism (3) also comprises a mud scraping plate (306) which is arranged in the mud storage pipe (301) and can move along the length direction of the mud storage pipe (301), and a pull rod (307) which can extend out of the mud discharging pipe (101) is arranged on the mud scraping plate (306);

the mud scraping plate (306) comprises a sliding plate (308) and a rotating plate (309) which are both composed of two fan-shaped plates, the sliding plate (308) and the rotating plate (309) can jointly form a circular plate with the outer side wall in clearance fit with the inner wall of the mud storage pipe (301), the rotating plate (309) is fixed at the end part of a pull rod (307), the sliding plate (308) is sleeved on the pull rod (307) and is positioned between the rotating plate (309) and the end part, extending out of the mud discharge pipe (101), of the pull rod (307), a limiting sliding groove (310) arranged along the length direction of the mud storage pipe (301) is arranged on the inner wall of the mud storage pipe (301), limiting convex blocks (311) capable of sliding in the limiting sliding groove (310) are arranged on two arc-shaped surfaces of the sliding plate (308), a clamping pin (312) capable of completely retracting into the rotating plate (309) is arranged on one arc-shaped surface of the rotating plate (309), and two clamping grooves (313) matched with the clamping pin (312) are arranged on the inner wall of the mud storage pipe (301);

an accommodating groove (314) for completely accommodating the clamping pin (312) is formed in the arc-shaped surface of the rotating plate (309), the clamping pin (312) is arranged in the accommodating groove (314) and is connected to the bottom surface of the accommodating groove (314) through a spring, the clamping pin (312) can extend out of the accommodating groove (314) under the action of the spring, a first inclined guide surface (315) is arranged on the outer side wall of the extending end of the clamping pin (312), and a second inclined guide surface (316) which is matched with the first inclined guide surface (315) and is used for clamping or releasing the clamping pin (312) from the clamping groove (313) is arranged on the side wall of the opening of the clamping groove (313);

the two clamping grooves (313) are respectively arranged at the lower top point and the left top point of the mud storage pipe (301), when the clamping pin (312) is clamped in the clamping groove (313) at the lower top point of the mud storage pipe (301), the length directions of the rotating plate (309) and the sliding plate (308) are vertical to form a circular plate together, and the mud inlet (303) is in a state of being closed by the mud blocking pipe (304); when the clamping pin (312) is clamped into the clamping groove (313) at the left top point of the mud storage pipe (301), the rotating plate (309) is parallel to the length direction of the sliding plate (308), and the mud inlet (303) and the mud outlet (305) are relatively in an open state.

2. The apparatus for treating oily sewage according to claim 1, wherein: the thickness of the end part, attached to the conveyor belt (203), of the middle part of the oil scraping plate (201) to the oil scraping plate (201) is gradually reduced, and the end part, attached to the conveyor belt (203), of the oil scraping plate (201) is provided with a plurality of through grooves (205) which are uniformly distributed in the width direction of the oil scraping plate (201) and through which oil is supplied to pass.

3. The apparatus for treating oily sewage according to claim 1, wherein: still be equipped with a connecting rod (317) of being connected with fender mud pipe (304) on pull rod (307), be equipped with on the inside wall of storing up mud pipe (301) and supply gliding arc spout (318) of connecting rod (317), connecting rod (317) one end is fixed on pull rod (307) lateral wall, and the other end passes arc spout (318) and fixes on fender mud pipe (304) lateral wall.

4. The apparatus for treating oily sewage according to claim 1, wherein: be equipped with many levels in sedimentation tank (1) and arrange and set up drain pipe (6) that are parallel to each other in same horizontal plane, drain pipe (6) set up in mud guide plate (302) upper portion, evenly be equipped with a plurality of wash ports (601) on the pipe wall of drain pipe (6), on drain pipe (6) one end all was fixed in sedimentation tank (1) inside wall, the other end all stretched out sedimentation tank (1) lateral wall and stretched out the tip and connect through a water main (602), water main (602) are connected with outlet pipe (603).

5. The apparatus for treating oily sewage according to claim 1, wherein: the mud guide plate (302) comprises a screen plate (319) with screen holes and filter cloth (320) fixedly laid on the screen plate (319), and a water storage chamber (321) is formed between the mud guide plate (302) and the lower bottom surface of the sedimentation tank (1).

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