CN217077308U

CN217077308U - Novel A3O-MBBR sewage treatment device

Info

Publication number: CN217077308U
Application number: CN202220756493.1U
Authority: CN
Inventors: 程荣; 程田钰; 李小雁
Original assignee: XI'AN RONGDA ENVIRONMENTAL PROTECTION CO Ltd
Current assignee: XI'AN RONGDA ENVIRONMENTAL PROTECTION CO Ltd
Priority date: 2022-04-01
Filing date: 2022-04-01
Publication date: 2022-07-29
Anticipated expiration: 2032-04-01

Abstract

The utility model discloses a novel A3O-MBBR sewage treatment device, which belongs to the technical field of sewage treatment devices. The device comprises a sewage treatment tank with a water inlet pipe and a water outlet pipe, wherein the inside of the sewage treatment tank is divided into a pre-denitrification tank, an anaerobic tank, an anoxic tank, an aerobic tank, a sedimentation tank, a first pump tank, a mixing tank, a flocculation sedimentation tank, a second pump tank, a cloth filter tank, a device room and a clean water tank by a plurality of partition plates with holes, and the water level of the pre-denitrification tank, the anaerobic tank, the anoxic tank, the aerobic tank, the sedimentation tank, the first pump tank, the mixing tank, the flocculation sedimentation tank, the second pump tank, the cloth filter tank, the device room and the clean water tank are sequentially reduced; the aerobic tank is divided into an aeration zone and a reflux zone which are distributed in parallel by a perforated clapboard, MBBR filler is filled in the aeration zone, a microporous aeration pipe is arranged at the bottom of the aeration zone, and the microporous aeration pipe is connected with an external air source through a first branch pipe of an air delivery pipe; the second branch pipe of the gas transmission pipe is positioned at the joint of the perforated clapboard and the upper liquid level; the bottom of the reflux zone is provided with a mixed liquid reflux pump, and the tail end of the aerobic tank is also provided with a PAC dosing pipe. The utility model has the advantages of effectively prevent that MBBR from packing gathering in the aerobic tank and blockking up mixed liquid backwash pump.

Description

Novel A3O-MBBR sewage treatment device

Technical Field

The utility model belongs to the technical field of sewage treatment device, a novel A3O-MBBR sewage treatment device is related to.

Background

As for the domestic sewage treatment project, the nitrogen and phosphorus removal process is mentioned, and AAO is firstly pushed, but with the improvement of the discharge standard of sewage treatment and the improvement of the water quality index of sewage caused by the improvement of the living standard of people, the simple AAO process can not meet the requirement of the water quality of inlet and outlet water of a sewage treatment station. In particular to ammonia nitrogen, TN and TP indexes, which are the key points and difficulties of each sewage treatment project. Compared with the traditional AAO process, the A3O (two-stage anoxic) process strengthens endogenous denitrification, improves the condition of insufficient carbon source of domestic sewage and deeply performs nitrogen and phosphorus removal. In recent years, the A3O process has become more widely used in combination with a Moving Bed Biofilm Reactor (MBBR). A3O-MBBR still has a lot of problems in the use process, for example, the MBBR filling material can not ensure the uniform flow state due to uneven aeration of an aerobic pool; the MBBR filler is easy to run off, block and aggregate; the reflux pump is blocked by MBBR packing; TP can not reach the standard only by biochemistry and the like.

Disclosure of Invention

In order to solve the problem that the MBBR filler easily takes place the gathering and blocks up the mixed liquid backwash pump easily in the good oxygen pond among the sewage treatment device, the utility model provides a novel A3O-MBBR sewage treatment device has the advantage that effectively prevents the MBBR filler gathering and block up the mixed liquid backwash pump in good oxygen pond.

The utility model discloses a realize through following technical scheme:

a novel A3O-MBBR sewage treatment device comprises a sewage treatment box with a water inlet pipe and a water outlet pipe, wherein the inside of the sewage treatment box is divided into a pre-denitrification tank, an anaerobic tank, an anoxic tank, an aerobic tank, a sedimentation tank, a first pump tank, a mixing tank, a flocculation sedimentation tank, a second pump tank, a cloth filter tank, a device room and a clean water tank by a plurality of partition plates with holes from a water inlet to a water outlet, wherein the water level of the pre-denitrification tank, the anaerobic tank, the anoxic tank, the aerobic tank, the sedimentation tank, the first pump tank, the mixing tank, the flocculation sedimentation tank, the second pump tank, the cloth filter tank, the device room and the clean water tank are sequentially reduced;

the aerobic tank is divided into an aeration zone and a reflux zone which are distributed in parallel by a perforated partition plate, MBBR filler is filled in the aeration zone, a microporous aeration pipe is arranged at the bottom of the aeration zone, and the microporous aeration pipe is connected with an external air source through a first branch pipe of an air conveying pipe; the second branch pipe of the gas transmission pipe is positioned at the joint of the perforated clapboard and the upper liquid level; a mixed liquid reflux pump is arranged at the bottom of the reflux area, and the mixed liquid flows back to the anoxic tank through a mixed liquid reflux pipe under the action of the mixed liquid reflux pump; the tail end of the aerobic tank is also provided with a PAC dosing pipe.

The diameter of the MBBR filler is 20-30mm, and the filling rate of the MBBR filler in the aeration zone is 20-40%.

The perforated partition plate is provided with a plurality of blocking holes, the aperture of each blocking hole is 8-18mm, and the distance between every two adjacent blocking holes is 25-60 mm.

A fiber rotary disc is arranged in the cloth filter; an ultraviolet disinfection instrument is arranged in the equipment room and is connected with the equipment room through a disinfection water inlet pipe and a disinfection water outlet pipe, and water in the filter cloth filter tank flows into the ultraviolet disinfection instrument through the disinfection water inlet pipe and then flows into the clean water tank through the disinfection water outlet pipe.

A first stirrer is arranged at the bottom of the anaerobic tank; a second stirrer and biological filler are arranged in the anoxic tank, and the second stirrer is positioned at the bottom of the anoxic tank;

the biological filler is braid biological filler.

Sedimentation tank bottom and first pump bottom of the pool portion intercommunication, first pump bottom of the pool portion is equipped with mud backwash pump and first sludge discharge pump under the effect of mud backwash pump, sedimentation tank mud flows back to the denitrification pond in advance through the mud reflux pipe, and under the effect of first sludge discharge pump, sedimentation tank mud is discharged by first pump through first sludge discharge pipe.

A PAM dosing pipe is arranged in the mixing tank, and a third stirrer is arranged in the mixing tank;

the flocculation basin is equipped with the fourth mixer, and flocculation and precipitation bottom and second pump bottom of the pool portion intercommunication are equipped with the second sludge pump in the second pump pond, and the mud that sinks after will flocculating settling is discharged by flocculation and precipitation pond through the second sludge discharge pipe.

Compared with the prior art, the utility model discloses following profitable technological effect has:

1. the utility model discloses in divide into aeration zone and backward flow district in with the aerobic tank through the perforation baffle, place mixed liquid backwash pump in the backward flow district, the separation hole aperture on the perforation baffle is less than the diameter of MBBR filler, MBBR filler can't pass the perforation baffle along with liquid flow, therefore can prevent that the MBBR filler from causing the jam to mixed liquid backwash pump, guarantee mixed liquid backwash pump's normal work; the second branch pipe is arranged at the joint of the perforated partition plate and the liquid level, and an external air source blows air through the air delivery pipe and the second branch pipe, so that MBBR fillers cannot gather near the perforated partition plate, further mixed liquid can pass through the perforated partition plate, and the MBBR fillers are prevented from blocking the perforated partition plate to reduce the sewage treatment efficiency; an external air source provides an air source for the microporous aeration pipe through the air delivery pipe and the first branch pipe, and the air outlet of the microporous aeration pipe is used for generating bubbles in mixed liquid in the aeration zone, so that the MBBR filler is stirred through the bubbles, and the MBBR filler can be uniformly mixed in the aerobic tank.

2. The utility model provides a in advance denitrification pond, anaerobism pond, oxygen deficiency pond, good oxygen pond, sedimentation tank, first pump pond, mix pond, flocculation basin, flocculation and precipitation pond, second pump pond, filter cloth filtering pond, equipment room and clean water basin arrange from high to low in proper order, conveniently rely on the water head to lead into the liquid that the previous step was handled and step one after, compare and use the suction pump to assist in the prior art and filter, reduced sewage treatment's cost, practiced thrift the energy; the utility model discloses in still adopt filter cloth filtering pond, ultraviolet ray disinfection appearance to the further edulcoration disinfection of sewage, need not to throw at the sterile in-process of edulcoration and throw the dosing agent, saved the cost of transportation and throwing the dosing agent.

Drawings

FIG. 1 is a schematic view of the structure of the device of the present invention;

wherein: 1 is a pre-denitrification tank, 2 is an anaerobic tank, 21 is a first stirrer, 3 is an anoxic tank, 31 is a second stirrer, 32 is biological filler, 4 is an aerobic tank, 41 is a perforated partition plate, 42 is an aeration zone, 421 is a microporous aeration pipe, 43 is a reflux zone, 431 is a mixed liquid reflux pump, 432 is a mixed liquid reflux pipe, 433 is a PAC dosing pipe, 44 is a gas pipe, 441 is a first branch pipe, 442 is a second branch pipe, 45 is an MBBR filler, 5 is a sedimentation tank, 6 is a first pump tank, 61 is a sludge reflux pump, 62 is a first sludge discharge pump, 63 is a first sludge discharge pipe, 64 is a sludge reflux pipe, 7 is a mixing tank, 71 is a third stirrer, 72 is a PAM dosing pipe, 8 is a flocculation tank, 81 is a fourth stirrer, 9 is a flocculation sedimentation tank, 10 is a second pump tank, 101 is a second sludge discharge pump, 102 is a second sludge discharge pipe, 11 is a filter cloth, 111 is a fiber rotary disc, and 12 is a plant room, 121 is a disinfection water inlet pipe, 122 is a disinfection water outlet pipe, 123 is an ultraviolet disinfection instrument, 13 is a clean water tank, 14 is a water inlet pipe, 15 is a water outlet pipe, and 16 is a clapboard with holes.

Detailed Description

The present invention will now be described in further detail with reference to the attached drawings, which are provided for purposes of illustration and not limitation.

As shown in fig. 1, the utility model discloses a novel A3O-MBBR sewage treatment device, which comprises a sewage treatment box with a water inlet pipe 14 and a water outlet pipe 15, the inside of the sewage treatment box is divided into a pre-denitrification tank 1, an anaerobic tank 2, an anoxic tank 3, an aerobic tank 4, a sedimentation tank 5, a first pump tank 6, a mixing tank 7, a flocculation tank 8, a flocculation sedimentation tank 9, a second pump tank 10, a cloth filter tank 11, a device room 12 and a clear water tank 13 by a plurality of perforated partition plates 16 from a water inlet to a water outlet, the water level is reduced in sequence, and each treatment tank is arranged from high to low, thereby being beneficial to realizing the liquid flow between the treatment tanks by means of liquid level difference and saving the cost;

the aerobic tank 4 is divided into an aeration zone 42 and a reflux zone 43 which are distributed in parallel by a perforated clapboard 41, a plurality of separation holes are arranged on the perforated clapboard 41, the aperture of each separation hole is 8-18mm, and the distance between every two adjacent separation holes is 25-60 mm; the aeration zone 42 is filled with MBBR filler 45, the diameter of the MBBR filler 45 is 20-30mm, the filling rate of the MBBR filler 45 in the aeration zone 42 is 20-40%, and the MBBR filler 45 can save sludge backflow, efficiently decarbonize and remove ammonia nitrogen, and improve the quality of outlet water; the bottom of the aeration zone 42 is provided with a microporous aeration pipe 421, the microporous aeration pipe 421 is connected with an external air source through a first branch pipe 441 of the air pipe 44, and the air outlet of the microporous aeration pipe 421 discharges air to generate bubbles in the mixed liquid in the aeration zone 42, so that the MBBR filler 45 is stirred by the bubbles to uniformly mix the MBBR filler 45 in the aerobic tank 4; the second branch pipe 442 of the gas pipe 44 is positioned at the joint of the perforated partition plate 41 and the upper liquid level, and an external gas source blows gas through the gas pipe 44 and the second branch pipe 442, so that the MBBR filler 45 cannot gather near the perforated partition plate 41, further the mixed liquid can pass through the perforated partition plate 41, and the MBBR filler 45 is ensured not to cause reduction of sewage treatment efficiency due to blockage of the perforated partition plate 41; a mixed liquid reflux pump 431 is arranged at the bottom of the reflux zone 43, the mixed liquid is refluxed to the anoxic tank 3 through a mixed liquid reflux pipe 432 under the action of the mixed liquid reflux pump 431, and the refluxed mixed liquid is denitrified in the anoxic tank 3 again; the end of the aerobic tank 4 is also provided with a PAC dosing pipe 433, PAC medicament can be added into the reflux zone 43 of the aerobic tank 4 through the PAC dosing pipe 433, so that the mixed liquid can quickly form a precipitate.

As shown in fig. 1, a fiber rotary disc 111 is arranged in the cloth filter 11; an ultraviolet disinfection instrument 123 is arranged in the equipment room 12, the ultraviolet disinfection instrument 123 is connected with the equipment room 12 through a disinfection water inlet pipe 121 and a disinfection water outlet pipe 122, and water in the cloth filter 11 flows into the ultraviolet disinfection instrument 123 through the disinfection water inlet pipe 121 and then flows into the clean water tank 13 through the disinfection water outlet pipe 122.

As shown in fig. 1, a first stirrer 21 is arranged at the bottom of the anaerobic tank 2, and the first stirrer 21 stirs the sewage in the anaerobic tank 2 for preventing sludge in the sewage from depositing, agglomerating and biologically inactivating; a second stirrer 31 and a biological filler 32 are arranged in the anoxic pond 3, and the second stirrer 31 is positioned at the bottom of the anoxic pond 3; the biological filler 32 is a braid biological filler 32, the braid biological filler 32 is used for hydrolyzing organic substances in sewage and performing denitrification treatment on the sewage in the anoxic pond 3, and the second stirrer 31 fully makes the sewage contact with the biological filler 32 on one hand and can prevent sludge in the sewage from sinking to the water bottom on the other hand; the first and second agitators 21, 31 are submersible agitators.

As shown in fig. 1, the bottom of the sedimentation tank 5 is communicated with the bottom of the first pump tank 6, sewage enters the sedimentation tank 5 and then is subjected to solid-liquid separation to form sludge and clear liquid, the sludge enters the bottom of the first pump tank 6 from the bottom of the sedimentation tank 5, a sludge return pump 61 and a first sludge discharge pump 62 are arranged at the bottom of the first pump tank 6, under the action of the sludge return pump 61, the sludge in the sedimentation tank 5 returns to the pre-denitrification tank 1 through a sludge return pipe 64, and the sludge is pre-denitrified in the pre-denitrification tank 1; the sludge in the sedimentation tank 5 can be discharged from the first pump tank 6 through the first sludge discharge pipe 63 under the action of the first sludge discharge pump 62.

As shown in fig. 1, a PAM dosing pipe 72 is arranged in the mixing tank 7, a third stirrer 71 is arranged in the mixing tank 7, a flocculant is added into the mixing tank 7 through the PAM dosing pipe 72, and the flocculant is mixed with sewage through the third stirrer 71; the flocculation tank 8 is provided with a fourth stirrer 81, the liquid mixed by the mixing tank 7 is provided with a flocculating agent, the fourth stirrer 81 stirs the liquid in the flocculation tank 8 to accelerate the contact of suspended sludge particles in the flocculation tank 8 and form a large floc, and meanwhile, the fourth stirrer 81 can prevent the formed floc from sinking to the bottom of the flocculation tank 8; the bottom of the flocculation sedimentation tank 9 is communicated with the bottom of the second pump tank 10, after entering the flocculation sedimentation tank 9, flocs in the flocculation tank 8 are settled without stirring to form sludge, and enter the bottom of the second pump tank 10 from the bottom of the flocculation tank 8, a second sludge discharge pump 101 is arranged in the second pump tank 10, and the sludge after flocculation sedimentation is discharged from the flocculation sedimentation tank 9 through a second sludge discharge pipe 102; the third stirrer 71 and the fourth stirrer 81 are both paddle type stirrers.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "provided", "mounted", "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The embodiments given above are preferred examples for implementing the present invention, and the present invention is not limited to the above-described embodiments. Any non-essential addition and replacement made by the technical features of the technical solution of the present invention by those skilled in the art all belong to the protection scope of the present invention.

Claims

1. A novel A3O-MBBR sewage treatment device is characterized by comprising a sewage treatment box with a water inlet pipe (14) and a water outlet pipe (15), wherein the inside of the sewage treatment box is divided into a pre-denitrification tank (1), an anaerobic tank (2), an anoxic tank (3), an aerobic tank (4), a sedimentation tank (5), a first pump tank (6), a mixing tank (7), a flocculation tank (8), a flocculation sedimentation tank (9), a second pump tank (10), filter cloth (11), a device room (12) and a clean water tank (13) by a plurality of perforated partition plates (16) from a water inlet to a water outlet, wherein the water level is reduced in sequence;

the aerobic tank (4) is divided into an aeration zone (42) and a reflux zone (43) which are distributed in parallel by a perforated partition plate (41), MBBR fillers (45) are filled in the aeration zone (42), a microporous aeration pipe (421) is arranged at the bottom of the aeration zone (42), and the microporous aeration pipe (421) is connected with an external air source through a first branch pipe (441) of an air pipe (44); the second branch pipe (442) of the gas conveying pipe (44) is positioned at the joint of the perforated clapboard (41) and the upper liquid level; a mixed liquid reflux pump (431) is arranged at the bottom of the reflux zone (43), and the mixed liquid is refluxed to the anoxic tank (3) through a mixed liquid reflux pipe (432) under the action of the mixed liquid reflux pump (431); the tail end of the aerobic tank (4) is also provided with a PAC dosing pipe (433).

2. The new type A3O-MBBR sewage treatment plant according to claim 1, wherein the diameter of said MBBR filler (45) is 20-30mm, and the filling rate of said MBBR filler (45) in the aeration zone (42) is 20-40%.

3. The novel A3O-MBBR sewage treatment equipment according to claim 1, wherein a plurality of blocking holes are arranged on the perforated partition plate (41), the aperture of each blocking hole is 8-18mm, and the distance between every two adjacent blocking holes is 25-60 mm.

4. The novel A3O-MBBR sewage treatment plant according to claim 1, wherein a fiber rotating disc (111) is arranged in said cloth filter (11); an ultraviolet disinfection instrument (123) is arranged in the equipment room (12), the ultraviolet disinfection instrument (123) is connected with the equipment room (12) through a disinfection water inlet pipe (121) and a disinfection water outlet pipe (122), and water in the cloth filter (11) flows into the ultraviolet disinfection instrument (123) through the disinfection water inlet pipe (121) and then flows into the clean water tank (13) through the disinfection water outlet pipe (122).

5. The novel A3O-MBBR sewage treatment plant according to claim 1, wherein the bottom of said anaerobic tank (2) is provided with a first stirrer (21); a second stirrer (31) and a biological filler (32) are arranged in the anoxic pond (3), and the second stirrer (31) is positioned at the bottom of the anoxic pond (3);

the biological filler (32) is a braid-type biological filler (32).

6. The novel A3O-MBBR sewage treatment device of claim 1, wherein the bottom of the sedimentation tank (5) is communicated with the bottom of the first pump tank (6), a sludge return pump (61) and a first sludge discharge pump (62) are arranged at the bottom of the first pump tank (6), under the action of the sludge return pump (61), sludge in the sedimentation tank (5) returns to the pre-denitrification tank (1) through a sludge return pipe (64), and under the action of the first sludge discharge pump (62), sludge in the sedimentation tank (5) is discharged from the first pump tank (6) through a first sludge discharge pipe (63).

7. The novel A3O-MBBR sewage treatment equipment according to claim 1, wherein a PAM dosing pipe (72) is arranged in the mixing tank (7), and a third stirrer (71) is arranged in the mixing tank (7);

flocculation basin (8) are equipped with fourth mixer (81), and flocculation and precipitation pond (9) bottom and second pump pond (10) bottom intercommunication are equipped with second sludge discharge pump (101) in second pump pond (10), and the mud that sinks after will flocculating settling is discharged by flocculation and precipitation pond (9) through second sludge discharge pipe (102).