CN216890280U

CN216890280U - Delay membrane surface pollution's sewage advanced treatment unit

Info

Publication number: CN216890280U
Application number: CN202220184599.9U
Authority: CN
Inventors: 涂凌波; 林鑫; 黄芳; 冯昭华; 代焕芳; 黄怡然
Original assignee: Fujian Environmental Protection Design Institute Co ltd
Current assignee: Fujian Environmental Protection Design Institute Co ltd
Priority date: 2022-01-24
Filing date: 2022-01-24
Publication date: 2022-07-05
Anticipated expiration: 2032-01-24

Abstract

The utility model discloses a sewage treatment device for delaying membrane surface pollution, which comprises a tank body formed by surrounding a partition plate, wherein the middle part of the tank body is provided with a water inlet pipe, the bottom of the tank body is communicated with a sludge settling hopper, and the sludge settling hopper is externally connected with a sludge pipe; a plurality of membrane devices are fixed inside the tank body, at least one membrane component is vertically arranged in each membrane device at intervals, and an aeration device is vertically arranged at a position adjacent to the membrane component; each membrane assembly comprises a frame and a membrane body vertically fixed in the frame; the aeration holes on the aeration device are obliquely arranged downwards, and the airflow formed by aeration generates shearing force with the surface of the membrane body; powdered activated carbon filler is also added into the tank body.

Description

Delay membrane surface pollution's sewage advanced treatment unit

Technical Field

The utility model particularly relates to a sewage treatment device for delaying membrane surface pollution, and belongs to the technical field of sewage treatment.

Background

A Membrane Bioreactor (MBR) is a sewage treatment technology combining a membrane filtration technology and biochemical treatment, wherein the membrane filtration technology mainly utilizes the interception function of an ultrafiltration membrane or a microfiltration membrane to replace a secondary sedimentation tank in the traditional activated sludge process to realize sludge-water separation. The membrane bioreactor has the advantages of good effluent quality, high operating efficiency, low sludge yield, convenience for automatic management and the like, and can be used as an advanced treatment process after the traditional sewage treatment. However, in a water treatment apparatus having a membrane filtration part, membrane fouling is a problematic issue that is difficult to solve and is also an important factor that limits the development of MBR. The membrane pollution is that impurity particles, bacteria, colloid, salt, etc. in the water body deposit and attach on the surface of the membrane structure or inside the holes thereof, thereby causing the permeability of the membrane filtering component to be obviously reduced, the filtering effect to be obviously worsened, and the service life of the membrane filtering component to be obviously influenced.

SUMMERY OF THE UTILITY MODEL

In order to overcome the problems in the prior art, the utility model provides a sewage treatment device for delaying the membrane surface pollution, which can be used together with the device A²The O process and other processes are perfectly combined to be used as the advanced treatment process of the conventional sewage biochemical treatment to delay the pollution of the membrane surface.

The technical scheme of the utility model is as follows:

a sewage treatment device for delaying membrane surface pollution comprises a tank body formed by surrounding a baffle plate, wherein a water inlet pipe is arranged in the middle of the tank body, a sludge settling hopper is communicated with the bottom of the tank body, and the sludge settling hopper is externally connected with a sludge pipe; a plurality of membrane devices are fixed inside the tank body, at least one membrane component is vertically arranged in each membrane device at intervals, and an aeration device is vertically arranged at a position adjacent to the membrane component; each membrane assembly comprises a frame and a membrane body vertically fixed in the frame; the aeration holes on the aeration device are obliquely arranged downwards, and airflow formed by aeration generates shearing force with the surface of the membrane body; the tank body is also added with powdered activated carbon filler.

Furthermore, a water production pipe is arranged at the top of the frame of the membrane module, the water production pipe is communicated with a water outlet pipe after being collected, and the water outlet pipe is converged with each membrane module to finally connect the water outlet of the membrane module to a self-priming pump for pumping water.

Further, the aeration device comprises an aeration branch pipe and a perforated aeration pipe; the vertical symmetry of aeration branch pipe sets up, and a plurality of perforation aeration pipe horizontally connect on two aeration branch pipes to arranging in proper order down from last, and the aeration hole is all opened to both sides to the perforation aeration pipe, and the trompil direction is slant 40 ~ 50 down.

Furthermore, the top of the aeration branch pipe is connected with an aeration pipe, and the aeration pipe is externally connected with a blower for air supply and aeration.

Furthermore, the membrane device is fixed on the upper part of the tank body by a rope and is positioned below the liquid level at the top end of the tank body.

Further, the membrane body is of a plate type or curtain type structure.

Further, the lower part of the tank body is set to be a slope, and the gradient of the slope is greater than 55 degrees.

Compared with the prior art, the utility model has the following beneficial effects: the utility model provides a sewage treatment device for delaying membrane surface pollution, which can be used with a²The O process and other processes are perfectly combined to be used as the advanced treatment process of the conventional sewage biochemical treatment; the aeration device adopts the inclined downward airflow with short distance and high strength, can generate larger shearing force on the surface of the membrane component, and effectively delays membrane pollution; meanwhile, the membrane device is fixed in the supernatant liquid area in the tank body, so that the MLSS concentration is low, and membrane pollution can be effectively delayed; the membrane component adopts the prior finished plate type or curtain type structure, and is convenient to manufacture.

Drawings

FIG. 1 is a sectional view of a sewage treatment apparatus for retarding membrane surface contamination according to the present invention;

FIG. 2 is a schematic view of the membrane apparatus structure of the sewage treatment apparatus for delaying membrane surface contamination according to the present invention.

In the drawings, the reference numbers denote:

1. a tank body; 11. a partition plate; 2. a membrane device; 21. a membrane module; 211. a frame; 212. a membrane body; 213. A water production pipe; 22. an aeration device; 221. an aeration branch pipe; 222. perforating an aeration pipe; 3. a rope; 4. a self-priming pump; 5. a water outlet pipe; 6. a blower; 7. an aeration pipe; 8. a water inlet pipe; 9. a sludge pipe; 10. a mud settling hopper.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments.

Referring to fig. 1 to 2, a sewage treatment device for delaying membrane surface pollution comprises a tank body 1 surrounded by a partition plate 11, wherein a water inlet pipe 8 is arranged in the middle of the tank body 1, a sludge settling hopper 10 is communicated with the bottom of the tank body, and the sludge settling hopper 10 is externally connected with a sludge pipe 9; the lower part of the tank body 1 is arranged to be a slope, the gradient is more than 55 degrees, so that sludge flows down along the slope and enters a sludge settling hopper 10, and the sludge is discharged through a sludge pipe 9 or is subjected to sludge backflow; a plurality of membrane devices 2 are fixed inside the tank body 1, at least one membrane module 21 is vertically arranged in each membrane device 2 at intervals, the membrane module 21 is used for filtering and treating pollutants, and an aeration device 22 is vertically arranged at a position adjacent to the membrane module 21; each membrane module 21 comprises a frame 211 and a membrane body 212 vertically fixed in the frame 211, and the membrane body 212 is of a plate-type or curtain-type structure and is convenient to assemble and disassemble; the aeration holes on the aeration device 22 are arranged obliquely downwards, and the airflow formed by aeration generates shearing force with the surface of the membrane body 212; powdery active carbon filler is also added into the tank body 1, so that the sludge property is improved, and membrane pollution is delayed.

Furthermore, a water production pipe 213 is arranged at the top of the frame 212 of the membrane module 21, the water production pipe 213 is communicated with the water outlet pipe 5 after being collected, and the water outlet pipe 5 is converged with the water outlet of each membrane module 21 and is finally connected to the water pumped out by the self-priming pump 4.

Further, the aeration device 22 comprises an aeration branch pipe 221 and a perforated aeration pipe 222; the aeration branch pipes 221 are vertically and symmetrically arranged, a plurality of perforated aeration pipes 222 which are sequentially arranged from top to bottom are horizontally connected to the two aeration branch pipes 221, aeration holes are formed in the two sides of each perforated aeration pipe 222, the diameter of each aeration hole is about 4mm, and the hole opening direction is inclined downwards by 40-50 degrees; the top of the aeration branch pipe 221 is connected with an aeration pipe 7, the aeration pipe 7 is externally connected with an air blower 6 for air supply aeration, and the air blower 6 is used for blowing aeration to form air flow and remove the pollution on the surface of the membrane 212 by utilizing the shearing force generated by the surface of the membrane 212.

Further, the membrane device 2 is fixed on the upper portion of the tank body 1 by a rope 3 and is located below the liquid level at the top end of the tank body 1, and the supernatant formed by the tank body 1 is pumped to delay membrane pollution.

The working principle of the utility model is as follows:

effluent after the traditional biochemical treatment process enters the tank body 1 through the water inlet pipe 8 and is subjected to mud-water separation primarily under the action of gravity, supernatant with low MLSS content is formed on the surface of the tank body 1, and the membrane component 21 is submerged near the supernatant, so that the accumulation of sludge on the surface of the membrane can be reduced; through the pumping action of the self-priming pump 4 and the high-efficiency filtering action of the membrane module 21, sewage is subjected to mud-water separation, sludge stays in the pool body 1, and clear water is separately discharged out of the pool through the self-priming pump 4; meanwhile, under the action of the blower 6, the aeration devices 22 arranged on the two sides of the membrane module 21 form obliquely downward bubbles to wash the surface of the membrane body 212, so that a large shearing force is formed between the bubbles and the surface of the membrane body 212, pollutants on the surface of the membrane body 212 are cleaned, and membrane pollution is delayed; the activated sludge contained in the sewage is deposited in a sludge settling hopper 10 under the action of gravity, and is directly discharged through a sludge pipe 9 or is refluxed with the sludge A²The other processes of the/O process are perfectly combined to be used as the advanced treatment process of the conventional sewage biochemical treatment.

The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.

Claims

1. The utility model provides a delay membrane surface pollution's sewage advanced treatment unit which characterized in that: comprises a tank body (1) formed by surrounding a clapboard (11), wherein the middle part of the tank body (1) is provided with a water inlet pipe, the bottom part of the tank body is communicated with a mud settling hopper (10), and the mud settling hopper (10) is externally connected with a sludge pipe (9); a plurality of membrane devices (2) are fixed inside the tank body (1), at least one membrane module (21) is vertically arranged in each membrane device (2) at intervals, and an aeration device (22) is vertically arranged at a position adjacent to the membrane module (21); each membrane assembly (21) comprises a frame (211) and a membrane body (212) vertically fixed in the frame (211); the aeration holes on the aeration device (22) are obliquely arranged downwards, and airflow formed by aeration generates shearing force with the surface of the membrane body (212); the tank body (1) is also internally added with powdered activated carbon filler.

2. The advanced wastewater treatment plant for retarding membrane surface fouling according to claim 1, wherein: and a water production pipe (213) is arranged at the top of the frame (211) of the membrane module (21), the water production pipe (213) is communicated with the water outlet pipe (5) after being collected, and the water outlet pipe (5) is converged with the water outlet of each membrane module (21) and is finally externally connected to a self-priming pump (4) for pumping water.

3. The advanced wastewater treatment plant for retarding membrane surface fouling according to claim 2, wherein: the aeration device (22) comprises aeration branch pipes (221) and perforated aeration pipes (222); aeration branch pipe (221) vertical symmetry sets up, and a plurality of perforation aeration pipe (222) horizontally connect on two aeration branch pipes (221) of arranging in proper order down from last, and aeration hole is all opened to both sides in perforation aeration pipe (222), and the trompil direction is oblique 40 ~ 50 down.

4. The advanced wastewater treatment plant for retarding membrane surface fouling according to claim 3, wherein: the top of the aeration branch pipe (221) is connected with an aeration pipe (7), and the aeration pipe (7) is externally connected with a blower (6) for air supply aeration.

5. The advanced wastewater treatment plant for retarding membrane surface fouling according to claim 4, wherein: the membrane device (2) is fixed on the upper part of the tank body (1) by a rope (3) and is positioned below the liquid level at the top end of the tank body (1).

6. The advanced wastewater treatment plant for retarding membrane surface fouling according to claim 5, wherein: the membrane body (212) is of a plate or curtain structure.

7. The advanced wastewater treatment plant for retarding membrane surface fouling according to claim 6, wherein: the lower part of the tank body (1) is provided with a slope, and the gradient of the slope is greater than 55 degrees.