CN212151978U

CN212151978U - Sewage treatment system

Info

Publication number: CN212151978U
Application number: CN201922322191.4U
Authority: CN
Inventors: 郑桂来; 李淑军; 夏珊珊; 王龙昌
Original assignee: Yunnan Xietong Environmental Protection Engineering Co ltd
Current assignee: Yunnan Xietong Environmental Protection Engineering Co ltd
Priority date: 2019-12-23
Filing date: 2019-12-23
Publication date: 2020-12-15
Anticipated expiration: 2029-12-23

Abstract

The utility model discloses a sewage treatment system, including equalizing basin, anaerobism pond, good oxygen pond, MBR membrane cisterna, clean water basin, first aeration pipe, sewage pump, mud backwash pump, self priming pump, back flush pump, efflux pump, fan, doser, this novel processing system has that sewage treatment is thorough, the operation and the advantage that the maintenance degree of difficulty is low. The novel treatment system also has the functions of purified water dosing and MBR membrane tank backwashing, and is convenient for maintaining the MBR membrane tank; the reciprocating impeller and the aeration head structure in the MBR membrane tank can be used for prolonging the working time of the MBR membrane component and reducing the backwashing maintenance frequency when the MBR membrane component works, and can also be used for enhancing the sludge washing effect and improving the washing efficiency when the MBR membrane component works; the key components in the novel treatment system can be integrated in the integrated cabinet body, the structure is compact, the layout is reasonable, the space utilization rate is high, the maintenance is convenient, and the novel treatment system is particularly suitable for medium and small sewage treatment environments, such as scenic spots, gas stations and the like.

Description

Sewage treatment system

Technical Field

The utility model belongs to the technical field of the environmental protection, concretely relates to sewage treatment system.

Background

In recent years, with the continuous improvement of the living standard of people, the industrial production scale is gradually enlarged, and the water demand is increased, wherein the recycling of the recovered water after sewage treatment is one of effective ways for solving the shortage of water resources, and the pollution to the environment can be effectively reduced after sewage treatment. The domestic and production sewage is complex in components, the pollutants in the sewage are difficult to treat by a single treatment process in the prior art, and although some sewage treatment equipment combines multiple treatment processes, the sewage treatment equipment has the defects of inconvenient maintenance and high frequency. For this reason, it is necessary to develop a sewage treatment method and a sewage treatment system capable of solving the above problems.

SUMMERY OF THE UTILITY MODEL

The first purpose of the utility model is to provide a sewage treatment method.

The second objective of the utility model is to provide a treatment system for realizing the sewage treatment method.

The first object of the present invention is achieved by the following steps:

s1, feeding the sewage into an anaerobic tank for hydrolytic acidification treatment;

s2, after the treatment in the step S1, taking the sewage at the upper part of the anaerobic tank, sending the sewage into an aerobic tank, and simultaneously aerating the aerobic tank to carry out contact oxidation treatment;

and S3, after the treatment in the step S2, feeding the sewage at the upper part of the aerobic tank into an MBR membrane tank for separation treatment, feeding the sludge obtained after the treatment back into the regulating tank, and feeding the water into a clean water tank.

The second purpose of the utility model is realized by that the device comprises an adjusting tank, an anaerobic tank, an aerobic tank, an MBR membrane tank, a clean water tank, a first aeration pipe, a sewage pump, a sludge reflux pump, a self-priming pump, a back-flushing pump, an external discharge pump, a fan and a medicine adding device, wherein the adjusting tank is internally provided with the sewage pump which is connected with a first water distribution pipe at the bottom in the anaerobic tank through a pipeline, the upper part in the anaerobic tank is provided with a first overflow weir, the first overflow weir is connected with a second water distribution pipe at the bottom in the aerobic tank through a pipeline, the upper part in the aerobic tank is provided with a second overflow weir, the first aeration pipe is arranged at the bottom in the aerobic tank, the first aeration pipe is arranged above the second water distribution pipe, the second overflow weir is connected with a third water distribution pipe at the bottom in the MBR membrane tank through a pipeline, the sludge reflux pump is arranged at the bottom in the MBR membrane tank, and the sludge reflux pump, the feed liquor end of self priming pump passes through the pipeline and is connected with the MBR membrane module drawing liquid end in the MBR membrane cisterna, the play liquid end of self priming pump passes through the pipeline and is connected with the clean water basin, and the pipeline is equipped with the doser, the feed liquor end of back flush pump passes through the pipeline and is connected with the clean water basin, the play liquid end of back flush pump passes through the pipeline and is connected with the drawing liquid end of MBR membrane module, the efflux pump is located in the clean water basin, the fan passes through the pipeline and is connected with first aeration pipe.

The utility model has the advantages that: the treatment method has the advantages of thorough sewage treatment and good effect by carrying out hydrolytic acidification treatment, contact oxidation treatment and MBR membrane separation treatment on the sewage, and is suitable for the wastewater treatment in medical treatment, papermaking, slaughtering and living places; the treatment system of the utility model has the advantages of thorough sewage treatment and low operation and maintenance difficulty; the treatment system of the utility model also has the functions of purified water dosing and MBR membrane tank back flushing, which is convenient for maintaining the MBR membrane tank; the reciprocating impeller and the aeration head structure in the MBR membrane tank can be used for prolonging the working time of the MBR membrane component and reducing the backwashing maintenance frequency when the MBR membrane component works, and can also be used for enhancing the sludge washing effect and improving the washing efficiency when the MBR membrane component works; the utility model discloses key component among the processing system can be integrated in the integration cabinet body, compact structure, rationally distributed, space utilization is high and maintain the convenience, in the specially adapted, small-size sewage treatment environment, like scenic spot, filling station etc..

Drawings

FIG. 1 is a schematic diagram of a treatment system according to the present invention;

FIG. 2 is a schematic view of the structure of water distribution holes;

FIG. 3 is a schematic diagram of the internal structure of an MBR membrane tank;

FIG. 4 is a schematic top view of the integrated cabinet;

in the figure: 1-a regulating tank, 2-an anaerobic tank, 3-an aerobic tank, 4-an MBR membrane tank, 5-a clean water tank, 6-a first aeration pipe, 7-a sewage pump, 8-a sludge reflux pump, 9-a self-priming pump, 10-a back-flushing pump, 11-an external discharge pump, 12-a fan, 13-a doser, 14-a first water distribution pipe, 15-a first overflow weir, 16-a second water distribution pipe, 17-a second overflow weir, 18-a third water distribution pipe, 19-an MBR membrane component, 20-a water distribution hole, 21-a stirring motor, 22-a stirring shaft, 23-an impeller, 24-a first slide block, 25-a first slide bar, 26-a pulley, 27-a first push plate, 28-a second slide block, 29-a second slide bar and 30-a second push plate, 31-an aeration head, 32-an integrated cabinet body, 33-an equipment room, 34-an electric control cabinet and 35-a door.

Detailed Description

The following description of the present invention is provided with reference to the accompanying drawings, which are not intended to limit the present invention in any way, and any alterations or replacements made based on the teachings of the present invention are all within the protection scope of the present invention.

The sewage treatment method of the utility model comprises the following steps:

Preferably, the water obtained after the MBR membrane tank treatment in the S4 step is firstly added with a disinfectant for disinfection, then is sent to a clean water tank and is discharged outside.

Preferably, the water obtained after the treatment in the step S4 by the MBR membrane tank is added with an MBR membrane backwashing agent, and is returned to the MBR membrane tank through the clean water tank for backwashing of the MBR membrane modules.

Preferably, the backwashing of the MBR membrane module is intermittent backwashing, and air is sent to the MBR membrane module when the backwashing is stopped and the MBR membrane module works.

The treatment system of the sewage treatment method shown in the attached drawings 1-4 comprises an adjusting tank 1, an anaerobic tank 2, an aerobic tank 3, an MBR membrane tank 4, a clean water tank 5, a first aeration pipe 6, a sewage pump 7, a sludge reflux pump 8, a self-priming pump 9, a backwash pump 10, an external discharge pump 11, a fan 12 and a medicine adding device 13, wherein the adjusting tank 1 is internally provided with the sewage pump 7, the sewage pump 7 is connected with a first water distribution pipe 14 at the bottom in the anaerobic tank 2 through a pipeline, the upper part in the anaerobic tank 2 is provided with a first overflow weir 15, the first overflow weir 15 is connected with a second water distribution pipe 16 at the bottom in the aerobic tank 3 through a pipeline, the upper part in the aerobic tank 3 is provided with a second overflow weir 17, the first aeration pipe 6 is arranged at the bottom in the aerobic tank 3, the first aeration pipe 6 is positioned above the second water distribution pipe 16, the second overflow weir 17 is connected with a third water distribution pipe 18 at the bottom in the MBR membrane tank 4 through a pipeline, the utility model discloses a sewage treatment device, including MBR membrane module 4, sludge reflux pump 8, pipeline and equalizing basin 1, sludge reflux pump 8 locates the bottom in MBR membrane cisterna 4, and sludge reflux pump 8 passes through the pipeline and is connected with equalizing basin 1, the feed liquor end of self priming pump 9 passes through the pipeline and is connected with the 19 drawing liquid ends of MBR membrane module in MBR membrane cisterna 4, the play liquid end of self priming pump 9 passes through the pipeline and is connected with clean water basin 5, and the pipeline is equipped with doser 13, the feed liquor end of back flush pump 10 passes through the pipeline and is connected with clean water basin 5, the play liquid end of back flush pump 10 passes through the pipeline and is connected with the drawing liquid end of MBR membrane module 19, outer ejector.

Preferably, the first aeration pipe 6 is in an annular structure, and a plurality of microporous aeration discs are arranged on the first aeration pipe 6.

Preferably, water distribution holes 20 are symmetrically arranged on both sides of the bottom of the first water distribution pipe 14, the second water distribution pipe 16 and the third water distribution pipe 18, an included angle α between a connecting line between the water distribution holes 20 and the circle center of the cross section of the water distribution pipes and a vertical central line passing through the circle center of the cross section of the water distribution pipes is 45 °, and the distance between the two water distribution holes 20 is 400 mm.

Preferably, the MBR membrane tank 4 further includes a stirring motor 21, a stirring shaft 22, an impeller 23, a first slider 24, a first slide bar 25, a pulley 26, a first push plate 27, a first cylinder, a second slider 28, a second slide bar 29, a second push plate 30, a second cylinder, and an aeration head 31, the stirring shaft 22 is respectively disposed at two sides of the MBR membrane module 19, the stirring shaft 22 is provided with a plurality of impellers 23 from top to bottom, the MBR membrane tank 4 is provided with a plurality of stirring motors 21 facing downward vertically, one stirring motor 21 is connected with one stirring shaft 22, the bottom of the stirring motor 21 is provided with the pulley 26, the first slide bar 25 is located on the stirring motor 21, the first slider 24 is sleeved on the first slide bar 25, the bottom of the first slider 24 is fixedly connected with the top of the stirring motor 21, the first push plate 27 is connected with the first slider 24, a piston rod of the first cylinder is connected with the first push plate 27, the first cylinder can drive the stirring motor 21 to reciprocate along the direction of the first slide bar 25 through the first push plate 27 and the first slide block 24, the second slide bar 29 is arranged below the stirring shaft 22, the second slide bar 29 is arranged above the third water distribution pipe 18, the second slide bar 29 is parallel to the first slide bar 25, the second slide block 28 is respectively sleeved on the first slide bar 25, the second slide block 28 is provided with an upward vertical aeration head 31, the aeration heads 31 correspond to the stirring shaft 22 one by one, the second push plate 30 is connected with the second slide block 28, a piston rod of the second cylinder penetrates through the MBR membrane tank 4 to be connected with the second push plate 30, the second cylinder can drive the aeration head 31 to reciprocate along the direction of the second slide bar 29 through the second push plate 30 and the second slide block 28, and the aeration head 31 is connected with the fan 12 through a hose.

Preferably, the stirring shaft 22 moves synchronously and in the same direction as the aeration head 31.

Preferably, still include the integration cabinet body 32, the left side in the integration cabinet body 32 is equipped with equipment room 33, and MBR membrane cisterna 4, clean water basin 5 all are located equipment room 33 right side, and anaerobism pond 2 is located the 4 right sides in MBR membrane cisterna, and good oxygen pond 3 is located clean water basin 5 right side, and self priming pump 9, back flush pump 10, fan 12, doser 13 all are located equipment room 33, be equipped with automatically controlled cabinet 34 in the equipment room 33, the equipment room 33 side is equipped with door 35, the integration cabinet body 32 top that anaerobism pond 2, good oxygen pond 3, MBR membrane cisterna 4, clean water basin 5 correspond is equipped with the access door respectively.

The utility model discloses processing system's theory of operation and working process: firstly, feeding sewage to be treated into a regulating tank 1 to collect the sewage; then the sewage in the regulating tank 1 is sent to the bottom of the anaerobic tank 2 through a first water distribution pipe 14 by a sewage pump 7 for hydrolysis acidification treatment; the treated sewage enters the bottom of the aerobic tank 3 through a first overflow weir 15 and a second water distribution pipe 16, and simultaneously, a fan 12 aerates the aerobic tank 3 through a first aeration pipe 6 and a microporous aeration disc to carry out contact oxidation treatment; the treated sewage enters the bottom of the MBR membrane tank 4 through a second overflow weir 17 and a third water distribution pipe 18;

under the suction working state of the self-priming pump 9, the sewage passes through the MBR membrane module 19 to separate sludge in the sewage, and the purified water is sent into the clean water tank 5 through the self-priming pump 9; before the purified water enters the clean water tank 5, the purified water can be added with the chemicals through a chemical adding device 13 and used for further sterilizing the purified water or backwashing an MBR membrane assembly; when the MBR membrane module 19 works, the first cylinder and the second cylinder run synchronously, the stirring motor 21 and the aeration head 31 are started, the stirring motor 21 drives the stirring shaft 22 and the impeller 23 to rotate continuously and stir sewage, the aeration head 31 aerates continuously to generate bubbles, the stirring shaft 22 and the aeration head 31 synchronously and equidirectionally reciprocate in the MBR membrane tank 4, and in the process that the bubbles generated by aeration rise at two sides of the MBR membrane module 19, one part of the bubbles is stirred by the impeller 23 and then is broken, the broken bubbles generate impact force, and the other part of the bubbles is pushed by the impeller 23 and the impact force generated by the broken bubbles and impacts the membrane surface of the MBR membrane module to be broken, so that sludge particles attached to the membrane surface are loosened, and the working time of the MBR membrane;

when the MBR membrane module 19 works for a period of time, the self-priming pump 9 stops, the back-flushing pump 10 pumps out water in the clean water tank 5 and performs back flushing on the MBR membrane module 19, so that sludge on the surface of the membrane is flushed; during back flushing, the first air cylinder, the second air cylinder, the stirring motor 21 and the aeration head 31 can be stopped, at the moment, sludge gradually slides and gathers, and then the sludge is sent to the regulating tank 1 by the sludge reflux pump 8; during back flushing, the first air cylinder, the second air cylinder, the stirring motor 21 and the aeration head 31 can be started for a period of time and then stopped, so that on one hand, sludge is quickly loosened and separated from the surface of the membrane under the action of bubble breakage, and on the other hand, the rising bubbles flush away the sludge, thereby enhancing the sludge flushing effect and improving the flushing efficiency; after the back washing is finished, the MBR membrane module 19 continues to work, and the working and back washing processes are continuously repeated;

as preferred technical scheme, the utility model discloses key component among the processing system can be integrated in the integration cabinet body 32, compact structure, rationally distributed, space utilization is high and maintain the convenience, and the small-size domestic sewage treatment environment of specially adapted, like scenic spot, filling station etc..

The present invention will be further described with reference to examples 1 to 3.

Example 1

Example 2

and S3, after the step S2, feeding the sewage at the upper part of the aerobic tank into an MBR membrane tank for separation treatment, feeding the treated sludge back into an adjusting tank, adding a disinfectant into the water for disinfection, then feeding the water into a clean water tank, and discharging the water outside.

Example 3

and S3, after the step S2, feeding the sewage at the upper part of the aerobic tank into an MBR membrane tank for separation treatment, feeding the treated sludge back to an adjusting tank, adding an MBR membrane backwashing agent into the water, and feeding the water back to the MBR membrane tank through a clean water tank for backwashing the MBR membrane module.

Claims

1. A sewage treatment system is characterized by comprising an adjusting tank (1), an anaerobic tank (2), an aerobic tank (3), an MBR membrane tank (4), a clean water tank (5), a first aeration pipe (6), a sewage pump (7), a sludge reflux pump (8), a self-priming pump (9), a backwashing pump (10), an external discharge pump (11), a fan (12) and a medicine adding device (13), wherein the sewage pump (7) is arranged in the adjusting tank (1), the sewage pump (7) is connected with a first water distribution pipe (14) at the bottom in the anaerobic tank (2) through a pipeline, a first overflow weir (15) is arranged at the upper part in the anaerobic tank (2), the first overflow weir (15) is connected with a second water distribution pipe (16) at the bottom in the aerobic tank (3) through a pipeline, a second overflow weir (17) is arranged at the upper part in the aerobic tank (3), and the first aeration pipe (6) is arranged at the bottom in the aerobic tank (3), and the first aeration pipe (6) is arranged above the second water distribution pipe (16), the second overflow weir (17) is connected with a third water distribution pipe (18) at the bottom in the MBR membrane pool (4) through a pipeline, the sludge reflux pump (8) is arranged at the bottom in the MBR membrane pool (4), the sludge reflux pump (8) is connected with the regulating tank (1) through a pipeline, the liquid inlet end of the self-priming pump (9) is connected with the liquid pumping end of an MBR membrane module (19) in the MBR membrane pool (4) through a pipeline, the liquid outlet end of the self-priming pump (9) is connected with the clean water pool (5) through a pipeline, the pipeline is provided with a medicine adding device (13), the liquid inlet end of the back-priming pump (10) is connected with the clean water pool (5) through a pipeline, the liquid outlet end of the back-priming pump (10) is connected with the liquid pumping end of the membrane module (19) through a pipeline, and the external discharge pump (11) is arranged in the clean, the fan (12) is connected with the first aeration pipe (6) through a pipeline.

2. The treatment system according to claim 1, wherein the first aeration pipe (6) is in a ring-shaped structure, and a plurality of microporous aeration discs are arranged on the first aeration pipe (6).

3. The treatment system according to claim 1, wherein the first water distribution pipe (14), the second water distribution pipe (16) and the third water distribution pipe (18) are symmetrically provided with water distribution holes (20) at two sides of the bottom, the angle of an included angle α between a connecting line between the water distribution holes (20) and the circle center of the cross section of the water distribution pipes and a vertical central line passing through the circle center of the cross section of the water distribution pipes is 45 degrees, and the distance between the two water distribution holes (20) is 400 mm.

4. The treatment system according to claim 1, characterized in that the MBR membrane tank (4) further comprises a stirring motor (21), a stirring shaft (22), an impeller (23), a first slide block (24), a first slide rod (25), a pulley (26), a first push plate (27), a first cylinder, a second slide block (28), a second slide rod (29), a second push plate (30), a second cylinder and an aeration head (31), wherein the stirring shaft (22) is respectively arranged at two sides of the MBR membrane module (19), the stirring shaft (22) is provided with a plurality of impellers (23) from top to bottom, the MBR membrane tank (4) is provided with a plurality of stirring motors (21) which are vertically downward, one stirring motor (21) is connected with one stirring shaft (22), the bottom of the stirring motor (21) is provided with a pulley (26), the first slide rod (25) is positioned on the stirring motor (21), the first sliding block (24) is sleeved on the first sliding rod (25), the bottom of the first sliding block (24) is fixedly connected with the top of the stirring motor (21), the first push plate (27) is connected with the first sliding block (24), a piston rod of the first air cylinder is connected with the first push plate (27), the first air cylinder can drive the stirring motor (21) to reciprocate along the direction of the first sliding rod (25) through the first push plate (27) and the first sliding block (24), the second sliding rod (29) is arranged below the stirring shaft (22), the second sliding rod (29) is arranged above the third water distribution pipe (18), the second sliding rod (29) is parallel to the first sliding rod (25), the second sliding block (28) is respectively sleeved on the first sliding rod (25), the second sliding block (28) is provided with upward vertical aeration heads (31), and the aeration heads (31) correspond to the stirring shaft (22) one by one, the second push plate (30) is connected with the second sliding block (28), a piston rod of the second air cylinder penetrates through the MBR membrane tank (4) to be connected with the second push plate (30), so that the second air cylinder can drive the aeration head (31) to reciprocate along the direction of the second sliding rod (29) through the second push plate (30) and the second sliding block (28), and the aeration head (31) is connected with the fan (12) through pipe hoses.

5. The treatment system according to claim 4, wherein the stirring shaft (22) and the aeration head (31) are moved synchronously and in the same direction.

6. The treatment system according to any one of claims 1 to 5, characterized by further comprising an integrated cabinet body (32), wherein an equipment room (33) is arranged on the left side in the integrated cabinet body (32), the MBR membrane pool (4) and the clean water pool (5) are both located on the right side of the equipment room (33), the anaerobic pool (2) is located on the right side of the MBR membrane pool (4), the aerobic pool (3) is located on the right side of the clean water pool (5), the self-priming pump (9), the back-flushing pump (10), the fan (12) and the chemical adding device (13) are all located in the equipment room (33), an electric control cabinet (34) is arranged in the equipment room (33), a door (35) is arranged on the side surface of the equipment room (33), and access doors are respectively arranged at the tops of the integrated cabinet body (32) corresponding to the anaerobic pool (2), the aerobic pool (3), the.