CN220110476U

CN220110476U - Rectangular combined tank with functions of sedimentation, water distribution and sludge backflow discharge

Info

Publication number: CN220110476U
Application number: CN202321229239.7U
Authority: CN
Inventors: 石凤; 张国运; 刘常敬; 黄宇; 刘胜军
Original assignee: CSCEC Aecom Consultant Co Ltd
Current assignee: CSCEC Aecom Consultant Co Ltd
Priority date: 2023-05-22
Filing date: 2023-05-22
Publication date: 2023-12-01
Anticipated expiration: 2033-05-22

Abstract

The utility model relates to the technical field of mud-water separation sedimentation treatment of municipal sewage and industrial wastewater, in particular to a rectangular combined tank with sedimentation, water distribution and sludge backflow discharge functions, which comprises an octagonal sedimentation tank, wherein an octagonal water channel is arranged on the inner wall of the top of the octagonal sedimentation tank, a partition wall is arranged in the octagonal water channel, the partition wall partitions the octagonal water channel into a water distribution channel and a water receiving channel, the water distribution channel is close to the inner wall of the octagonal sedimentation tank, the cross section of the inner wall of the octagonal sedimentation tank is regular octagon, the bottom of the octagonal sedimentation tank is circular, the octagon sedimentation tank and the octagon water channel are longer than a circular water outlet weir, and meanwhile, the load on the weir is reduced; the device realizes the cycle in and cycle out, uses less equipment, and reduces maintenance workload; the operation management is basically the same as that of a conventional radial flow sedimentation tank, the operation is simple and convenient, and the workload of operators is small; the occupied area and the pipelines are saved, the investment is saved, the construction cost is reduced, and the operation is lower in carbon and environment-friendly; is suitable for primary precipitation or secondary precipitation.

Description

Rectangular combined tank with functions of sedimentation, water distribution and sludge backflow discharge

Technical Field

The utility model relates to the technical field of sludge-water separation sedimentation treatment of municipal sewage and industrial wastewater, in particular to a rectangular combined tank with sedimentation, water distribution and sludge reflux discharge functions.

Background

In the prior art, radial flow sedimentation, horizontal flow sedimentation, inclined tube sedimentation and high-efficiency sedimentation are generally adopted for primary sedimentation and secondary sedimentation in the field of sewage treatment. In the secondary sedimentation, the radial sedimentation is adopted in most cases, because the radial sedimentation technology has less equipment, simple operation and management, low cost and good water outlet effect. However, radial sedimentation has the defects that the round tank body and the upstream and downstream treatment monomers cannot be built together, so that the occupied area is large, the connecting pipes are increased, the investment is increased and the like.

Disclosure of Invention

The utility model aims to provide a rectangular combined pool with functions of sedimentation, water distribution and sludge backflow discharge, which saves occupied area and pipelines, saves investment and reduces construction cost.

The utility model discloses a rectangular combined tank with functions of sedimentation, water distribution and sludge backflow discharge, which comprises an octagonal sedimentation tank, wherein a water distribution tank is arranged on the outer side of the octagonal sedimentation tank, a water inlet hole is formed in the side wall of the water distribution tank, which is far away from the octagonal sedimentation tank, a water distribution weir is arranged on one side, close to the octagonal sedimentation tank, of the top of the water distribution tank, an octagonal water channel is arranged on the inner wall of the top of the octagonal sedimentation tank, a separation wall is arranged in the octagonal water channel, the separation wall separates the octagonal water channel into a water distribution channel and a water receiving channel, the water distribution channel is close to the inner wall of the octagonal sedimentation tank, the water distribution weir is communicated with the water distribution channel, a water inlet gate is connected between the water distribution weir and the water distribution channel, the cross section of the inner wall of the octagonal sedimentation tank is regular octagon, the bottom wall of the octagon sedimentation tank is circular, a backfill area is arranged between the circular bottom of the octagon sedimentation tank and the lower part of the inner wall of the octagon sedimentation tank, a plurality of water distribution pipes are uniformly distributed on the inner wall of the octagon sedimentation tank, the water distribution channel is arranged on the outer side of the water distribution channel, and the lower end of the water distribution board stretches out of the bottom wall of the water distribution channel; the inner wall of the octagonal sedimentation tank below the water distribution pipe is also connected with a water retaining skirt board, the octagonal sedimentation tank is connected with a mud scraping and sucking machine, and a scraping arm of the mud scraping and sucking machine is rotationally connected to the lower part of the octagonal sedimentation tank.

Raw water enters the distribution tank through the water inlet hole, and is introduced into the octagonal ditch through the water distribution weir and the water inlet gate, the water inlet gate is fully opened or the water inlet amount is adjusted and controlled, and the water inlet gate can be closed when the octagonal sedimentation tank is overhauled. The water distribution weir can be used for uniformly distributing raw water into the plurality of octagonal sedimentation tanks. Raw water in the distribution tank enters the distribution channel 801 after being distributed by the water distribution weir, and then uniformly enters the octagonal sedimentation tank through the water distribution pipe and the water retaining skirt plate, wherein the water retaining skirt plate has the functions of energy dissipation, drainage and deceleration, and the water retaining skirt plate prevents disturbance of sludge and accelerates sedimentation of the sludge.

Further, the height of the side wall of the water receiving channel close to the center of the octagonal sedimentation tank is smaller than that of the partition wall, the side wall of the water receiving channel close to the center of the octagonal sedimentation tank is connected with a water outlet weir and a scum baffle, and the scum baffle is arranged on the side of the water outlet weir close to the center of the octagonal sedimentation tank; the height of the scum baffle is larger than that of the water outlet weir, a water collecting tank is arranged on the outer side of the octagonal sedimentation tank and communicated with the water collecting channel, and a drain pipe is connected to the lower portion of the water collecting tank.

The supernatant after precipitation enters a water receiving channel through a water outlet weir, then is collected into a water receiving tank, and is discharged to the next unit through a water discharge pipe after being buffered. The scum baffle is convenient for the scum scraping plate to use, and the scum baffle is of a circular structure, and scum on the water surface is scraped by the scum scraping plate of the mud scraping and sucking machine.

Further, the octagon sedimentation tank lower part be the mud subsidence concentration zone, scrape the arm rotation of inhaling the mud machine and connect in the mud subsidence concentration zone, the octagon sedimentation tank outside is equipped with the mud pump house, is connected with the mud pipe between mud pump house and the mud subsidence concentration zone, is connected with the sleeve valve on the mud pipe, the sleeve valve is established inside the mud pump house, mud pump house internally connected has the backwash pump, mud pump house internally connected has the residual pump, the residual pump is connected with the mud pipe.

The precipitated sludge is settled and concentrated by the sludge, and then is discharged to a sludge pump room by a sludge scraping and sucking machine, a sludge discharge pipe is connected with a sleeve valve at the tail end of the side of the pump room and used for controlling the sludge discharge amount of a sedimentation tank, the sleeve valve can be manually or electrically controlled, the sludge is discharged to the sludge pump room by the sleeve valve, the sludge is pressurized by a reflux pump and enters a front-end biochemical system, and the residual sludge is pressurized by a residual pump and is discharged to a sludge treatment unit by the sludge pipe.

Further, the side wall of the scum baffle close to the center of the octagonal sedimentation tank is connected with a scum bucket, a scum collecting tank is arranged on the outer side of the octagonal sedimentation tank, the scum bucket is communicated with the scum collecting tank, a solid-liquid separation device is arranged at the bottom of the scum collecting tank, and the solid-liquid separation device is connected with a scum collecting trolley and a liquid pipeline.

The scum on the scum baffle is scraped into a scum bucket by a scum scraping plate of the mud scraping and sucking machine, the scum falls into a scum collecting tank through the scum bucket, a solid-liquid separation device is arranged in the scum collecting tank, separated liquid is discharged to a front tank through a pipeline, and the separated scum is discharged to a scum collecting trolley to be treated together with other grid slags.

Further, the distribution canal on be connected with the floating mud baffle, the floating mud baffle outside side is equipped with the flushing pipe, the flushing pipe is towards the floating mud baffle, the octagon sedimentation tank outside be equipped with the floating mud and get rid of the pond, the floating mud baffle is got rid of the pond intercommunication with the floating mud, is connected with the floating mud between getting rid of the pond and gets rid of the gate.

The floating mud baffle intercepts the floating mud in the water distribution channel, and the floating mud cannot flow automatically, so that the floating mud is washed by using a washing pipeline, is discharged to a floating mud discharging pool through a floating mud discharging gate after washing, and is discharged to a sewage pipe of a factory through the pipeline.

Further, the outside of octagon sedimentation tank be equipped with the blowdown valve chamber, octagon sedimentation tank bottom outside is connected with the blowdown pipe, blowdown pipe one end is connected with the valve, the valve is established in the blowdown valve chamber, the one end that the blowdown pipe did not connect the valve is connected with octagon sedimentation tank bottom.

When the sewage is required to be emptied and overhauled, the mud-water mixture in the pond is discharged to the emptying valve chamber through the emptying pipe, is discharged through the valve in the emptying valve chamber and is finally discharged to the sewage pipe in the factory.

Further, the top of the octagonal sedimentation tank is connected with an overhaul channel, and the overhaul channel is communicated with the side wall of the top of the octagonal sedimentation tank and the top of the mud scraping and sucking machine.

Further, the bottom of the overhaul channel is connected with a sludge interface instrument, and a probe of the sludge interface instrument faces to the octagonal sedimentation tank; the top of the sludge pump room is connected with a liquid level meter, and a probe of the liquid level meter faces the sludge pump room.

The sludge interface instrument is used for controlling the sludge height of the system, discharging sludge, and sending an alarm signal to the master control room when the sludge level is insufficient or exceeds a set normal value; the sludge pump room is internally provided with a liquid level meter for controlling the sludge height, the sludge discharge amount and the reflux amount of the system, the liquid level meter is linked with a residual pump and a reflux pump, and an alarm signal is generated when the sludge level is insufficient or exceeds a set normal value and is sent to a main control room.

Furthermore, the lower part of the distribution tank is provided with an anti-sinking disturbance device, and the anti-sinking disturbance device comprises a main pipe and a plurality of branch pipes, and the branch pipes are communicated with the main pipe.

The lower part of the distribution tank is provided with an anti-sinking disturbance device, water or gas can be selected as medium in the anti-sinking disturbance device, the specific selection of which medium can be determined according to the field condition and the use environment, and the anti-sinking disturbance device can continuously run or intermittently run through time control.

Furthermore, an inclination angle of more than or equal to 55 degrees is arranged between the inner wall of the backfill area and the bottom wall of the octagonal sedimentation tank, and an inclination angle of 1 degree is arranged at the outer lateral center of the bottom wall of the octagonal sedimentation tank.

The inclination angle of 55 degrees meets the requirement of free falling of sludge.

The beneficial effects of the utility model are as follows:

1. according to the utility model, the octagonal sedimentation tank and the octagonal water channel are longer than the circular water outlet weir, meanwhile, the load on the weir is reduced, the concentration of effluent SS is reduced by the octagonal sedimentation tank, and the sedimentation effect is improved;

2. the utility model realizes the circumference in and circumference out through the arrangement of the octagonal canal, so that the equipment is less, and the maintenance workload is effectively reduced;

3. the operation management of the utility model is basically the same as that of a conventional radial flow sedimentation tank, the operation is simple and convenient, and the workload of operators is less;

4. the utility model saves occupied area and pipelines, saves investment, reduces construction cost, and has lower carbon and environmental protection in operation; can be applied to primary precipitation or secondary precipitation.

Drawings

FIG. 1 is a schematic plan view of the top of the present utility model;

FIG. 2 is a schematic plan view of the bottom part of the present utility model;

FIG. 3 is a cross-sectional view A-A of FIG. 1 in accordance with the present utility model;

FIG. 4 is a cross-sectional view B-B of FIG. 1 in accordance with the present utility model.

In the figure: 1. an octagonal sedimentation tank; 2. a distribution tank; 3. a water collecting tank; 4. a sludge pump house; 5. a scum collecting tank; 6. removing floating mud from the pool; 7. venting the valve chamber; 8. octagonal canal; 801. a distribution canal; 802. a water collecting channel; 9. a water distribution pipe; 10. a dividing wall; 11. a water retaining skirt board; 12. a water outlet weir; 13. a scum baffle; 14. a mud scraping and sucking machine; 15. a sludge sedimentation concentration zone; 16. backfilling the area; 17. a sludge interface instrument; 18. a service passage; 19. a mud pipe; 20. blow-down pipe; 22. a reflux pump; 23. a residual pump; 24. a sleeve valve; 25. a water inlet gate; 26. a water distribution weir; 27. an anti-sinking disturbance device; 28. a scum bucket; 29. a solid-liquid separation device; 30. slag collecting trolley, 31. Floating mud baffle; 32. a floating mud removing gate; 33. a valve; 34. a water inlet hole; 35. a drain pipe; 36. a sludge pipe; 37. flushing the pipeline; 38. a level gauge.

Detailed Description

As shown in figures 1-4, the rectangular combined pond with functions of sedimentation, water distribution and sludge reflux discharge comprises an octagonal sedimentation pond 1, wherein a distribution pond 2 is arranged on the outer side of the octagonal sedimentation pond 1, a water inlet opening 34 is formed in the side wall, far away from the octagonal sedimentation pond 1, of the distribution pond 2, an anti-sedimentation disturbance device 27 is arranged at the lower part of the distribution pond 2, the anti-sedimentation disturbance device 27 comprises a main pipe and a plurality of branch pipes, the branch pipes are communicated with the main pipe, a water distribution weir 26 is arranged on one side, close to the octagonal sedimentation pond 1, of the top of the distribution pond 2, an octagonal water channel 8 is arranged on the inner wall of the top of the octagonal sedimentation pond 1, a separation wall 10 is arranged in the octagonal water channel 8, the separation wall 10 separates the octagonal water channel 8 into a water distribution channel 801 and a water receiving channel 802, the water distribution channel 801 is close to the inner wall of the octagonal sedimentation pond 1, the water distribution weir 26 is communicated with the water distribution channel 801, a water inlet gate 25 is connected between the water distribution weir 26 and the water distribution channel 801, the cross section of the inner wall of the octagonal sedimentation tank 1 is regular octagon, the bottom wall of the octagonal sedimentation tank 1 is circular, an inclined angle of 1 degree is arranged from the outer side of the bottom wall of the octagonal sedimentation tank 1 to the center, a backfill area 16 is arranged between the circular bottom of the octagonal sedimentation tank 1 and the lower part of the inner wall of the octagonal sedimentation tank 1, an inclined angle of more than or equal to 55 degrees is arranged between the inner wall of the backfill area 16 and the bottom wall of the octagonal sedimentation tank 1, water distribution pipes 9 are arranged at the bottom of the water distribution channel 801, a plurality of water distribution pipes 9 are uniformly distributed by taking the center of the octagonal sedimentation tank 1 as the axis circumference, water retaining skirting plates 11 are connected to the outer side of the lower part of the water distribution channel 801, and the lower ends of the water retaining skirting plates 11 extend out of the bottom wall of the water distribution channel 801; the inner wall of the octagonal sedimentation tank 1 below the water distribution pipe 9 is also connected with a water retaining skirt plate 11, the inside of the octagonal sedimentation tank 1 is connected with a mud scraping and sucking machine 14, and a scraping arm of the mud scraping and sucking machine 14 is rotatably connected to the lower part of the octagonal sedimentation tank 1; the height of the side wall of the water receiving channel 802, which is close to the center of the octagonal sedimentation tank 1, is smaller than the height of the partition wall 10, the side wall of the water receiving channel 802, which is close to the center of the octagonal sedimentation tank 1, is connected with an effluent weir 12 and a scum baffle 13, and the scum baffle 13 is arranged at the side of the effluent weir 12, which is close to the center of the octagonal sedimentation tank 1; the height of the scum baffle 13 is larger than that of the water outlet weir 12, a water receiving tank 3 is arranged outside the octagonal sedimentation tank 1, the water receiving tank 3 is communicated with a water receiving channel 802, and a drain pipe 35 is connected to the lower part of the water receiving tank 3.

The lower part of the octagonal sedimentation tank 1 is provided with a sludge sedimentation concentration zone 15, a scraping arm of a scraping and sucking machine 14 is rotatably connected in the sludge sedimentation concentration zone 15, a sludge pump room 4 is arranged on the outer side of the octagonal sedimentation tank 1, a sludge discharge pipe 19 is connected between the sludge pump room 4 and the sludge sedimentation concentration zone 15, a sleeve valve 24 is connected on the sludge discharge pipe 19, the sleeve valve 24 is arranged in the sludge pump room 4, a reflux pump 22 is connected in the sludge pump room 4, a residual pump 23 is connected in the sludge pump room 4, and a sludge pipe 36 is connected at the outlet of the residual pump 23; the top of the sludge pump room 4 is connected with a liquid level meter 38, and a probe of the liquid level meter 38 faces the sludge pump room 4.

The side wall of the scum baffle 13, which is close to the center of the octagonal sedimentation tank 1, is connected with a scum bucket 28, the outer side of the octagonal sedimentation tank 1 is provided with a scum collecting tank 5, the scum bucket 28 is communicated with the scum collecting tank 5, the bottom of the scum collecting tank 5 is provided with a solid-liquid separation device 29, and the solid-liquid separation device 29 is connected with a scum collecting trolley 30 and a liquid pipeline.

The water distribution channel 801 is connected with a floating mud baffle 31, a flushing pipeline 37 is arranged on the outer side of the floating mud baffle 31, the flushing pipeline 37 faces the floating mud baffle 31, a floating mud discharging tank 6 is arranged on the outer side of the octagonal sedimentation tank 1, the floating mud baffle 31 is communicated with the floating mud discharging tank 6, and a floating mud discharging gate 32 is connected between the floating mud discharging tanks 6.

The outside of the octagonal sedimentation tank 1 is provided with a vent valve chamber 7, the outside of the bottom of the octagonal sedimentation tank 1 is connected with a vent pipe 20, one end of the vent pipe 20 is connected with a valve 33, the valve 33 is arranged in the vent valve chamber 7, and one end of the vent pipe 20, which is not connected with the valve 33, is connected with the bottom of the octagonal sedimentation tank 1.

The top of the octagonal sedimentation tank 1 is connected with a maintenance channel 18, the maintenance channel 18 is communicated with the side wall of the top of the octagonal sedimentation tank 1 and the top of the sludge scraping and sucking machine 14, the bottom of the maintenance channel 18 is connected with a sludge interface instrument 17, and a probe of the sludge interface instrument 17 faces the octagonal sedimentation tank 1.

As shown in fig. 1 to 4, in this embodiment, an octagonal sedimentation tank 1 and four triangular areas are used to form a rectangular combined tank, the four triangular areas are respectively set such that a distribution tank 2 occupies a triangular area, a water receiving tank 3 occupies a triangular area, a sludge pump room 4 occupies a triangular area, and a scum collecting tank 5, a floating mud removing tank 6 and an emptying valve chamber 7 occupy a triangular area together.

When the utility model is used, raw water enters the distribution tank 2 through the water inlet 34, then enters the distribution channel 801 of the octagonal water channel 8 through the water distribution weir 26 and the water inlet gate 25, the medium in the anti-sinking disturbance device 27 arranged in the distribution tank 2 can be water or gas, and the specific selection of the medium can be determined according to the field condition and the use environment, and the operation mode is that: the device can continuously run or intermittently run through time control; the octagonal canal 8 realizes a form of circumference in and circumference out, raw water in the distribution tank 2 enters the distribution canal 801 and then uniformly enters the octagonal sedimentation tank 1 through the water distribution pipe 10 and the water retaining skirt plate 11, the water retaining skirt plate 11 has the functions of energy dissipation, drainage and deceleration, the water retaining skirt plate 11 prevents disturbance of sludge, and the sedimentation of the sludge is accelerated; the supernatant after precipitation falls into a water receiving channel 802 through an water outlet weir 12, then is collected into a water receiving tank 3, and is discharged to the next unit through a water discharge pipe 35 after being buffered; the precipitated sludge is discharged to the sludge pump room 5 through the sludge scraping and sucking machine 14 after being settled and concentrated. The sludge interface instrument 17 is used for controlling the sludge height of the system, discharging sludge, and sending an alarm signal to the master control room when the sludge level is insufficient or exceeds a set normal value; the slag baffle 13 is convenient for the use of a slag scraping plate, and the slag baffle is of a circular structure, and the slag on the water surface is scraped to a slag hopper 28 by the slag scraping plate of the mud scraping and sucking machine; the scum falls into a scum collecting tank 5 through a scum bucket 28, a solid-liquid separation device 29 is arranged in the scum collecting tank 5, separated liquid is discharged to a front tank through a pipeline, and separated scum is discharged to a scum collecting trolley 30 to be treated together with other grid slags; the floating mud baffle 31 intercepts the floating mud in the distribution channel 801, and the floating mud cannot flow automatically, so the floating mud is washed by using the washing pipeline 37, is discharged to the floating mud discharging pool 6 through the floating mud discharging gate 32 after washing, and is discharged to a sewage pipe in a factory through the pipeline. When the emptying maintenance is needed, the mud-water mixture in the pool is discharged to the emptying valve chamber 7 through the emptying pipe 20, is discharged in the emptying valve chamber 7 through the valve 33, and is finally discharged to a sewage pipe in the factory; the service aisle 18 is for service personnel to walk.

The utility model comprises seven functional areas of a sedimentation area, a water distribution area, a water receiving area, a sludge pump room, a scum collecting area, a floating sludge removing area and an emptying valve room. The utility model inherits the advantages of the traditional radial-flow sedimentation tank and optimizes and improves the traditional radial-flow sedimentation tank, and the rectangular combined tank can be combined with a biological tank, a water distribution well, a sludge pump house and the like, so that the occupied area and the land-consuming cost are saved, meanwhile, the tank wall is public, the investment is saved, the octagonal structure reduces the surface load, improves the solid-liquid separation effect, and reduces suspended matters in water.

Claims

1. A rectangular combined pond with functions of sedimentation, water distribution and sludge backflow discharge is characterized in that: including octagon sedimentation tank (1), octagon sedimentation tank (1) outside is equipped with distribution tank (2), be equipped with inlet opening (34) on the lateral wall that octagon sedimentation tank (1) was kept away from to distribution tank (2), one side that octagon sedimentation tank (1) was close to at distribution tank (2) top is equipped with water distribution weir (26), be equipped with octagon ditch (8) on octagon sedimentation tank (1) top inner wall, be equipped with in octagon ditch (8) separate wall (10), be divided into distribution ditch (801) and receipts ditch (802) with octagon ditch (8) separate wall (10), distribution ditch (801) are close to octagon sedimentation tank (1) inner wall, be connected with inlet gate (25) between distribution weir (26) and distribution ditch (801), octagon sedimentation tank (1) inner wall cross-section shape is regular octagon, octagon sedimentation tank (1) diapire is circular, be equipped with between octagon sedimentation tank (1) inner wall lower part and backfill district (16), distribution ditch (801) are equipped with water distribution ditch (801) and water distribution ditch (801) are connected with water distribution ditch (801) in the water distribution ditch (9) of water distribution ditch (801) circumference, the lower end of the water retaining skirt plate (11) extends out of the bottom wall of the water distribution channel (801); the inner wall of the octagonal sedimentation tank (1) below the water distribution pipe (9) is also connected with a water retaining apron board (11), the inside of the octagonal sedimentation tank (1) is connected with a mud scraping and sucking machine (14), and a scraping arm of the mud scraping and sucking machine (14) is rotationally connected to the lower part of the octagonal sedimentation tank (1).

2. The rectangular combined pond with functions of sedimentation, water distribution and sludge backflow and discharge according to claim 1, which is characterized in that: the side wall of the water receiving channel (802) close to the center of the octagonal sedimentation tank (1) is smaller than the partition wall (10), the side wall of the water receiving channel (802) close to the center of the octagonal sedimentation tank (1) is connected with a water outlet weir (12) and a scum baffle (13), and the scum baffle (13) is arranged on the side of the water outlet weir (12) close to the center of the octagonal sedimentation tank (1); the height of the scum baffle (13) is larger than that of the water outlet weir (12), a water receiving tank (3) is arranged on the outer side of the octagonal sedimentation tank (1), the water receiving tank (3) is communicated with the water receiving channel (802), and a drain pipe (35) is connected to the lower portion of the water receiving tank (3).

3. The rectangular combined pond with functions of sedimentation, water distribution and sludge backflow and discharge according to claim 2, which is characterized in that: the utility model provides a sludge sedimentation concentration area (15) is in octagon sedimentation tank (1) lower part, scrapes the arm rotation of inhaling mud machine (14) and connects in sludge sedimentation concentration area (15), octagon sedimentation tank (1) outside is equipped with mud pump house (4), is connected with between mud pump house (4) and the sludge sedimentation concentration area (15) and arranges mud pipe (19), is connected with sleeve valve (24) on arranging mud pipe (19), sleeve valve (24) are established inside mud pump house (4), mud pump house (4) internally connected with backwash pump (22), mud pump house (4) internally connected with residual pump (23), residual pump (23) exit linkage has mud pipe (36).

4. A rectangular combined pond with functions of sedimentation, water distribution and sludge reflux discharge according to claim 3, which is characterized in that: the slag collecting device is characterized in that a slag hopper (28) is connected to the side wall, close to the center of the octagonal sedimentation tank (1), of the dross baffle (13), a dross collecting tank (5) is arranged on the outer side of the octagonal sedimentation tank (1), the slag hopper (28) is communicated with the dross collecting tank (5), a solid-liquid separation device (29) is arranged at the bottom of the dross collecting tank (5), and the solid-liquid separation device (29) is connected with a slag collecting trolley (30) and a liquid pipeline.

5. The rectangular combined pond with functions of sedimentation, water distribution and sludge backflow and discharge according to claim 4, wherein the rectangular combined pond is characterized in that: the water distribution canal (801) on be connected with the float mud baffle (31), the float mud baffle (31) outside side is equipped with flushing pipe (37), flushing pipe (37) are towards float mud baffle (31), octagon sedimentation tank (1) outside be equipped with float mud and get rid of pond (6), float mud baffle (31) and float mud get rid of pond (6) intercommunication, be connected with between float mud and get rid of pond (6) float mud and get rid of gate (32).

6. The rectangular combined pond with functions of sedimentation, water distribution and sludge backflow and discharge according to claim 5, wherein the rectangular combined pond is characterized in that: the device is characterized in that an emptying valve chamber (7) is arranged on the outer side of the octagonal sedimentation tank (1), an emptying pipe (20) is connected on the outer side of the bottom of the octagonal sedimentation tank (1), one end of the emptying pipe (20) is connected with a valve (33), the valve (33) is arranged in the emptying valve chamber (7), and one end of the emptying pipe (20) which is not connected with the valve (33) is connected with the bottom of the octagonal sedimentation tank (1).

7. The rectangular combined pond with functions of sedimentation, water distribution and sludge backflow and discharge according to claim 6, wherein the rectangular combined pond is characterized in that: the top of the octagonal sedimentation tank (1) is connected with an overhaul channel (18), and the overhaul channel (18) is communicated with the side wall of the top of the octagonal sedimentation tank (1) and the top of the mud scraping and sucking machine (14).

8. The rectangular combined pond with functions of sedimentation, water distribution and sludge backflow and discharge according to claim 7, wherein the rectangular combined pond is characterized in that: the bottom of the overhaul channel (18) is connected with a sludge interface instrument (17), and a probe of the sludge interface instrument (17) faces to the octagonal sedimentation tank (1); the top of the sludge pump room (4) is connected with a liquid level meter (38), and a probe of the liquid level meter (38) faces the sludge pump room (4).

9. The rectangular combined pond with functions of sedimentation, water distribution and sludge backflow and discharge according to claim 8, wherein the rectangular combined pond is characterized in that: the anti-sinking disturbance device (27) is arranged at the lower part of the distribution tank (2), and the anti-sinking disturbance device (27) comprises a main pipe and a plurality of branch pipes, and the branch pipes are communicated with the main pipe.

10. A rectangular combined pond with functions of sedimentation, water distribution and sludge reflux discharge according to any one of claims 1 to 9, characterized in that: an inclination angle of more than or equal to 55 degrees is arranged between the inner wall of the backfill area (16) and the bottom wall of the octagonal sedimentation tank (1), and an inclination angle of 1 degree is arranged in the center of the outer side of the bottom wall of the octagonal sedimentation tank (1).