CN211770842U

CN211770842U - Small-town sewage treatment system capable of achieving four types of ground surface levels

Info

Publication number: CN211770842U
Application number: CN202020057457.7U
Authority: CN
Inventors: 许光远; 童君; 许誌; 黄亮; 高文乔; 王矛矛
Original assignee: Hefei Municipal Design And Research Institute Co ltd
Current assignee: Hefei Municipal Design And Research Institute Co ltd
Priority date: 2020-01-13
Filing date: 2020-01-13
Publication date: 2020-10-27
Anticipated expiration: 2030-01-13

Abstract

The utility model discloses a reach four kinds of little town sewage treatment system of earth's surface level, including the elevator pump room, synthesize equalizing basin, make up biochemical pond, high-efficient sedimentation tank, active sand filtering pond, contact disinfection pond, above-mentioned each unit respectively and through the pipe connection, the elevator pump room includes thick grid and a elevator pump, synthesize the equalizing basin and include thin grid, grit chamber, equalizing basin and secondary elevator pump district. The adjusting tank of the utility model is arranged behind a primary lifting pump room, so that the buried depth of the adjusting tank is reduced, the land excavation is reduced, and the investment cost is saved; the fine grating, the advection grit chamber and the adjusting tank are jointly built, the anaerobic tank, the anoxic tank, the aerobic tank, the advection type sedimentation tank and the sludge tank are jointly built, and the common walls of the tank bodies reduce the investment cost, save the land and reduce the land acquisition; the system can meet the standard of 'surface water environment quality standard' in the quasi-four types through reasonable parameter design.

Description

Small-town sewage treatment system capable of achieving four types of ground surface levels

Technical Field

The utility model relates to a sewage treatment technical field especially relates to a reach four kinds of small town sewage treatment system of earth's surface level.

Background

In 2015, the action plan for water pollution control ("ten items of water") is proposed to provide a higher target for sewage treatment, the sewage treatment of small towns in key drainage basins is also proposed formally, the effluent standard of sewage treatment is improved day by day, the first class A of the pollutant discharge standard of urban sewage treatment plants is improved to the standard of the quality standard of surface water environment, the land in the small towns is mostly farmlands or basic farmlands, the land resources are precious day by day, the contradiction between the high standard of effluent treatment of small towns and the land occupation is also highlighted, so that a sewage treatment system with less land occupation and meeting the high standard is required to solve the problems.

The person skilled in the art is dedicated to solving the above technical drawbacks.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned defects of the prior art, the technical purpose of the utility model is to solve the contradiction problem between the high standard of sewage treatment effluent and the occupation of land in small towns.

For realizing above-mentioned technical purpose, the utility model provides a reach four kinds of little town sewage treatment system of earth's surface level, including elevator pump room, comprehensive equalizing basin, combination biochemical pond, high-efficient sedimentation tank, active sand filtering pond, contact disinfection pond, above-mentioned each unit is respectively through the pipe connection, the elevator pump room includes thick grid and a elevator pump, comprehensive equalizing basin includes thin grid, grit chamber, equalizing basin and secondary elevator pump, the combination biochemical pond includes anaerobism pond, oxygen deficiency pond, good oxygen pond, advection formula sedimentation tank, sludge pump room and sludge impoundment, high-efficient sedimentation tank includes coagulating basin, flocculation area and settling zone.

Preferably, the fine grid, the grit chamber and the regulating reservoir are combined to form a structure, a secondary lifting pump is arranged in the regulating reservoir, the fine grid and the grit chamber are both positioned on the upper part of the regulating reservoir, the grit chamber is a advection grit chamber, and a sand discharge pump is arranged in the grit chamber.

Preferably, the anaerobism pond oxygen deficiency pond, good oxygen pond, advection sedimentation tank and the sludge impoundment combination sets up to a structure, be provided with first dive agitator in the anaerobism pond, be provided with second dive agitator in the oxygen deficiency pond, throw first sodium acetate in the oxygen deficiency pond, good oxygen pond sets up the aeration dish and is connected with the air-blower through the pipeline, be provided with the liquid reflux pump of nitrifying in the good oxygen pond, the advection sedimentation tank pass through the pipeline with the sludge pump room is connected, be provided with the sludge reflux pump in the sludge pump room, be provided with the excess sludge pump in the sludge pump room, the sludge pond passes through the pipeline and is connected with sludge dewaterer, throw in the sludge dewaterer and add first PAM.

Preferably, the efficient sedimentation tank is added with second PAM and PAC, the active sand filter is added with second sodium diacetate, and the contact disinfection tank is added with sodium hypochlorite.

The utility model has the advantages that:

due to the structural design, the adjusting tank is arranged behind the primary lifting pump house, so that the buried depth of the adjusting tank is reduced, the earthwork excavation is reduced, and the investment cost is saved;

the fine grating, the advection grit chamber and the adjusting tank are jointly built, the anaerobic tank, the anoxic tank, the aerobic tank, the advection type sedimentation tank and the sludge tank are jointly built, and the common walls of the tank bodies reduce the investment cost, save the land and reduce the land acquisition;

the system can meet the standard of 'surface water environment quality standard' in the quasi-four types through reasonable parameter design.

Drawings

Fig. 1 is a structural layout diagram of the present invention.

In the figure: 1 lift pump room, 11 thick grids, 12 primary lift pumps, 2 comprehensive adjusting pools, 21 thin grids, 22 grit chambers, 221 sand discharge pumps, 23 adjusting pools, 24 secondary lift pumps, 3 combined biochemical pools, 31 anaerobic pools, 311 first submersible mixers, 32 anoxic pools, 321 second submersible mixers, 33 aerobic pools, 331 nitrified liquid reflux pumps, 332 aeration trays, 333 air blowers,

air ducts

334, 34 horizontal sedimentation pools, 35 sludge pump rooms, 351 sludge reflux pumps, 352 excess sludge pumps, 36 sludge pools, 37 sludge dewaterers, 4 high-efficiency sedimentation pools, 41 coagulation areas, 42 flocculation areas, 43 sedimentation areas, 5 activated sand filter pools, 6 contact disinfection pools, 71 water inlet pipes, 72 pipelines, 73 pipelines, 74 pipelines, 75 pipelines, 76 pipelines, 77 water outlet pipes, 81 sludge pipes, 82 sludge pipes, 83 sludge pipes, 84 sludge pipes, 85 sludge pipes, 91 adding sodium acetate, 92 PAM, Adding PAM93, PAC94, sodium acetate 95 and sodium hypochlorite 96.

Detailed Description

The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings, so as to fully understand the objects, the features and the effects of the present invention.

Example (b):

as shown in figure 1, the small town sewage treatment system capable of achieving four types of ground surface levels comprises a lifting pump room 1, a comprehensive adjusting tank 2, a combined biochemical tank 3, a high-efficiency sedimentation tank 4, an active sand filter tank 5 and a contact disinfection tank 6, wherein the units are respectively connected through pipelines, the lifting pump room 1 comprises a coarse grating 11 and a primary lifting pump 12, the comprehensive adjusting tank 2 comprises a fine grating 21, a grit chamber 22, an adjusting tank 23 and a secondary lifting pump 24, the combined biochemical tank 3 comprises an anaerobic tank 31, an anoxic tank 32, an aerobic tank 33, a horizontal flow sedimentation tank 34, a sludge pump room 35 and a sludge tank 36, and the high-efficiency sedimentation tank 4 comprises a coagulation zone 41, a flocculation zone 42 and a sedimentation zone 43.

Specifically, sewage passes through a water inlet pipe 71, sequentially passes through a lift pump room 1, a first pipeline 72, a comprehensive adjusting tank 2, a second pipeline 73, a combined biochemical tank 3, a third pipeline 74, a high-efficiency sedimentation tank 4, a fourth pipeline 75, an active sand filter tank 5, a fifth pipeline 76 and a contact disinfection tank 6, and is finally discharged into a natural water body through a water outlet pipe 77, and effluent can reach the standard four types (the four types of surface levels) of the 'surface water environment quality standard'.

Specifically, the fine grid 21, the grit chamber 22 and the adjusting tank 23 are combined to form a structure, a secondary lift pump 24 is arranged in the adjusting tank 23, the fine grid 21 and the grit chamber 22 are both positioned at the upper part of the adjusting tank 23, the grit chamber 22 is a horizontal flow grit chamber, and a sand discharge pump is arranged in the grit chamber 22.

Specifically, an anaerobic tank 31, an anoxic tank 32, an aerobic tank 33, a horizontal sedimentation tank 34 and a sludge tank 36 are combined to form a structure, the anaerobic tank 31 is provided with a first submersible stirrer 311, the anoxic tank 32 is internally provided with a second submersible stirrer 321, first sodium acetate 91 is added into the anoxic tank 32, the aerobic tank 33 is provided with an aeration disc 332 and is connected with an air blower 333 through an air duct 334, and the aerobic tank 33 is provided with a nitrifying liquid reflux pump 331 for refluxing nitrifying liquid into the anoxic tank 32; the horizontal sedimentation tank 34 discharges sludge into the sludge pump room 35 through the first sludge pipe 81 by static pressure; the sludge pump room 35 is provided with a sludge return pump 351 which returns sludge to the anaerobic tank 31 through a second sludge pipe 82, and the sludge pump room 35 is provided with an excess sludge pump 352 which lifts sludge to the sludge tank 36 through a third sludge pipe 83; sludge in the sludge tank 36 enters the sludge dewatering machine 37 through the fourth sludge pipe 84 to be dried and then is transported to the outside for disposal. The sludge in the high-efficiency sedimentation tank enters the sludge tank 36 through a fifth sludge pipe 85.

Specifically, a second PAM93 and a PAC94 are added into the high-efficiency sedimentation tank 4, a second sodium diacetate 95 is added into the active sand filter 5, and a contact disinfection tank 6 is added with a sodium hypochlorite 96.

Specifically, the sewage passes through the coarse grating 11 through the water inlet pipe 71, the coarse grating 11 filters larger floaters and solids, the sewage is lifted to the fine grating 21 through the primary lifting pump 12, and the fine grating 21 filters smaller floaters and solids; the sewage automatically flows into a grit chamber 22, and sand grains with relative density larger than 2.65 and grain size larger than 0.2mm are removed through gravity sand setting; sewage automatically flows into the regulating tank 23, and the water quality and the water quantity are homogenized in the regulating tank 23, so that the stability of the quality and the water quantity of inlet water of a subsequent biochemical treatment process is ensured; the sewage is lifted by the secondary lift pump 24 and enters the anaerobic tank 31, the anoxic tank 32, the aerobic tank 33 and the horizontal sedimentation tank 34 in sequence; the nitrification reaction is carried out in the aerobic tank 33 to convert ammonia nitrogen into nitrate nitrogen, the nitrified liquid is refluxed to the anoxic tank 32 through the nitrified liquid reflux pump 331, and the denitrification reaction is carried out in the anoxic tank 32 to remove the total nitrogen; phosphorus release reaction occurs in the anaerobic tank 31, and phosphorus absorption reaction occurs in the aerobic tank 33; the horizontal sedimentation tank 34 is used for sludge-water separation, sludge is discharged into the sludge pump room 35 through static pressure, and phosphorus and microorganism residues in the sludge pump room 35 enter the sludge tank in the form of excess sludge through the excess sludge pump 352. A coagulation area 41, a flocculation area 42 and a sedimentation area 43 are arranged in the high-efficiency sedimentation tank 4, so that SS and total phosphorus in the effluent are further reduced, and meanwhile, the blockage of the activated sand filter 5 is avoided; the activated sand filter 5 generates denitrification reaction, further reduces the total nitrogen in the sewage, and ensures that the effluent total nitrogen meets the high-standard effluent requirement; and finally, adding sodium hypochlorite 96 into the contact disinfection tank 6 to ensure that the discharged escherichia coli reaches the standard and is discharged, and discharging the sewage meeting the water outlet standard into a natural water body through a water outlet pipe 77.

Specifically, the system is suitable for sewage treatment scale of 500-3000m in small towns³/d。

The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the teachings of the present invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.

Claims

1. The utility model provides a reach four kinds of small town sewage treatment system of earth's surface level which characterized in that: the device comprises a lift pump room (1), a comprehensive adjusting tank (2), a combined biochemical tank (3), a high-efficiency sedimentation tank (4), an active sand filter (5) and a contact disinfection tank (6), wherein all the units are respectively connected through pipelines;

the lift pump room (1) includes coarse grid (11) and primary lift pump (12), synthesize equalizing basin (2) including thin grid (21), grit chamber (22), equalizing basin (23) and secondary lift pump (24), combination biochemical pond (3) are including anaerobism pond (31), oxygen deficiency pond (32), good oxygen pond (33), advection sedimentation tank (34), mud pump house (35) and sludge impoundment (36), high-efficient sedimentation tank (4) are including coagulating basin (41), flocculation area (42) and settling zone (43).

2. A surface level four class small town sewage treatment system as claimed in claim 1 wherein: the fine grid (21), grit chamber (22) with equalizing basin (23) combination sets up to a structure, be provided with secondary elevator pump (24) in equalizing basin (23), fine grid (21) with grit chamber (22) all are located equalizing basin (23) upper portion, grit chamber (22) are the advection grit chamber, be provided with the sand pump in grit chamber (22).

3. A surface level four class small town sewage treatment system as claimed in claim 2 wherein: the anaerobic tank (31), the anoxic tank (32), the aerobic tank (33), the horizontal sedimentation tank (34) and the sludge tank (36) are combined to form a structure, the anaerobic tank (31) is provided with a first submersible stirrer (311), a second submersible stirrer (321) is arranged in the anoxic tank (32), first sodium acetate (91) is added in the anoxic tank (32), the aerobic tank (33) is provided with an aeration disc (332) and is connected with an air blower (333) through a pipeline, a nitrified liquid reflux pump (331) is arranged in the aerobic tank (33), the horizontal sedimentation tank (34) is connected with the sludge pump room (35) through a pipeline, a sludge reflux pump (351) is arranged in the sludge pump room (35), a residual sludge pump (352) is arranged in the sludge pump room (35), and the sludge tank (36) is connected with a sludge dewatering machine (37) through a pipeline, and a first PAM (92) is added into the sludge dewatering machine (37).

4. A surface level four class small town sewage treatment system as claimed in claim 1 wherein: and a second PAM (93) and a PAC (94) are added into the high-efficiency sedimentation tank (4), a second sodium diacetate (95) is added into the active sand filter tank (5), and a sodium hypochlorite (96) is added into the contact disinfection tank (6).