CN209797720U

CN209797720U - Sewage treatment system

Info

Publication number: CN209797720U
Application number: CN201920520821.6U
Authority: CN
Inventors: 郑英; 叶小斌; 张益凡
Original assignee: Jiangxi Book Source Technology Co Ltd
Current assignee: Hangzhou Qiusuo Digital Technology Co ltd
Priority date: 2019-04-17
Filing date: 2019-04-17
Publication date: 2019-12-17
Anticipated expiration: 2029-04-17

Abstract

the utility model discloses a sewage treatment system, including the catch basin that the pipeline connects gradually, first pH equalizing basin, flocculation reaction pond, first sedimentation tank, fibre ball filter, the anaerobism pond, facultative tank, good oxygen pond, second sedimentation tank, MBR membrane filtration pond, disinfection pond and reuse water tank, be equipped with the water oil separating tank between catch basin and the first pH equalizing basin, the upper portion of water oil separating tank is equipped with the inclined wire net, be equipped with first medicine blender and the second on the pipeline that water oil separating tank and first pH equalizing basin are connected and add the medicine blender, be equipped with second pH equalizing basin between fibre ball filter and the anaerobism pond, be equipped with flowing back valve and third on the pipeline that second pH equalizing basin and fibre ball filter are connected and add the medicine blender. The utility model reduces the load of subsequent pollution treatment; can prevent the COD index from being discharged outside without reaching the standard, saves water source, improves the utilization rate of the water source and reduces the secondary pollution of the water body.

Description

Sewage treatment system

Technical Field

The utility model relates to a sewage treatment technical field specifically is a sewage treatment system.

Background

Sewage, generally refers to effluent water from life and production that is contaminated to some extent. The sewage mainly comprises domestic sewage, industrial sewage and initial rainwater. The main pollutants of the sewage include pathogen pollutants, oxygen-consuming pollutants, plant nutrients, toxic pollutants and the like. Sewage treatment: the sewage is purified to reach the water quality requirement of draining a certain water body or reusing the water body. Sewage treatment is widely applied to various fields such as buildings, agriculture, traffic, energy, petrifaction, environmental protection, urban landscape, medical treatment, catering and the like, and is increasingly used in daily life of common people.

For the current sewage treatment, the following problems exist: 1. the efficiency of the sewage treatment is lower, and the treatment effect is not ideal enough, 2, the sewage that discharges after handling has the condition that COD does not reach standard and just arranges outward, 3, it is unsatisfactory to make microorganism operational environment not in biochemical stage pH value parameter adjustment, influence degradation efficiency, 4, the water utilization ratio after handling is lower, 5, in the processing procedure, the waste water that the pressure filter produced leads to secondary pollution easily, thereby caused great pollution to the environment, also more can't realize the circulation reuse to the industrial water, therefore, in order to improve the treatment effect and further improve to prior art, realize the reuse of the sewage after handling, a sewage treatment system needs to be designed.

SUMMERY OF THE UTILITY MODEL

The technical problem solved by the utility model is to provide a sewage treatment system to solve the shortcomings in the background technology.

The utility model provides a technical problem adopt following technical scheme to realize:

A sewage treatment system comprises a water collecting tank, a first pH adjusting tank, a flocculation reaction tank, a first sedimentation tank, a fiber ball filter, an anaerobic tank, a facultative tank, an aerobic tank, a second sedimentation tank, an MBR membrane filtering tank, a disinfection tank, a reuse water tank and a sludge treatment system, wherein an oil-water separation tank is arranged between the water collecting tank and the first pH adjusting tank, an inclined net is arranged at the upper part of the oil-water separation tank, an oil discharge pipe is arranged at one side of the upper part of the oil-water separation tank, a collecting tank corresponding to the outlet of the inclined net is arranged at the inlet side of the oil-water separation tank, the outlet of the oil-water separation tank is connected with the inlet of the first pH adjusting tank through a pump, a first dosing mixer is arranged on a pipeline connecting the oil-water separation tank and the first pH adjusting tank, the outlet of the first pH adjusting tank is connected with the inlet of the flocculation reaction tank, a second dosing mixer is arranged on a pipeline connecting the first pH adjusting tank and the flocculation reaction tank, the outlet of, the outlet of the first sedimentation tank is connected with the water inlet of the fiber ball filter through a liquid inlet pump and a liquid inlet valve, the water outlet of the fiber ball filter is connected with the inlet of the anaerobic tank through a liquid outlet valve, the outlet of the anaerobic tank is connected with the inlet of the facultative tank, the outlet of the facultative tank is connected with the aerobic tank, the aerobic tank is internally provided with an aeration pipe, an aeration pipeline is connected with an air blower, the outlet of the aerobic tank is connected with the inlet of the second sedimentation tank, the outlet of the second sedimentation tank is connected with the inlet of an MBR membrane filtering tank, a flat plate membrane filter is arranged in the MBR membrane filtering tank, the outlet of the MBR membrane filtering tank is connected with a reuse water tank through a disinfection tank; sludge processing system includes pressure filter, sludge impoundment, sludge pump and mud house steward, the drain of first pH equalizing basin, the drain of flocculation reaction tank, the drain of first sedimentation tank, the drain of second sedimentation tank and MBR membrane filtration tank pass through mud branch pipe and blowoff valve respectively and sludge house steward is connected, sludge house steward's export is through the entry linkage of sludge pump with the sludge impoundment, the export of sludge impoundment is through pump sending to pressure filter, the filtrating export of pressure filter is through the entry linkage of pipeline with the sludge impoundment.

Further, a second pH adjusting tank is arranged between the fiber ball filter and the anaerobic tank, and a drain valve and a third dosing mixer are arranged on a pipeline connected with the second pH adjusting tank and the fiber ball filter.

Further, the fiber ball filter comprises a tank body, one side of the upper part of the tank body is provided with a water inlet, the other side is provided with a back flush drain outlet, the top of the tank body is provided with a back flush water inlet pipe, the bottom of the tank body is provided with a water outlet, one side of the upper part of the tank body is provided with a manhole, the bottom of the tank body is provided with supporting legs, the upper and lower parts of the interior of the tank body are respectively provided with an upper screen plate and a lower screen plate, a fiber ball filter material packing layer is arranged between the upper screen plate and the lower screen plate, a fiber ball filter material is arranged in the fiber ball filter material packing layer, one end of a backwashing water inlet pipe sequentially penetrates through the upper screen plate, the fiber ball filter material packing layer and the lower screen plate from top to bottom and is connected with a water distributor, a reuse water tank is connected with the other end of the backwashing water inlet pipe through a pipeline, a backwashing pump and a backwashing valve, the water distributor is of a circular structure, flushing nozzles are distributed on the upper surface of the water distributor, and a backwashing sewage outlet returns to the upper.

Furthermore, a COD detector is arranged on an outlet pipeline of the aerobic tank, the outlet pipeline of the aerobic tank is divided into two pipelines after passing through the COD detector, one pipeline is connected with the second sedimentation tank, and the other pipeline flows back to the anaerobic tank through a return pipeline, a return valve and a return pump.

further, the supernatant of the sludge tank is connected with a water collecting tank through a pipeline.

The utility model has the advantages that:

1. The inclined net can play a role of primary interception, reduce the bringing of ineffective sludge,

2. The oil-water separation tank can remove oil stains, so that the load of subsequent pollution treatment is reduced;

3. The pH value can be adjusted by arranging the second pH adjusting tank, so that the device is suitable for the working environment of subsequent anaerobic bacteria and aerobic bacteria;

4. the COD detector and the reflux pipeline are arranged on the outlet pipeline of the aerobic tank, so that the COD index can be prevented from being discharged outside without reaching the standard,

5. The second sedimentation tank of the fiber ball filter is connected with a backwashing water inlet pipe through a pipeline, a backwashing pump and a backwashing valve, so that backwashing can be carried out on the fiber ball filter, and sewage after backwashing returns to the upper part of the inclined net through a backwashing sewage discharge outlet and a backwashing sewage discharge pipe, so that water sources are saved, and the utilization rate of the water sources is improved.

6. And after the sludge in the first pH adjusting tank, the flocculation reaction tank, the first sedimentation tank, the second sedimentation tank and the MBR membrane filter tank is subjected to filter pressing by a filter press, filtrate returns to the sludge tank, supernatant in the sludge tank returns to the water collecting tank through a pipeline, and filter cakes are transported outwards, so that the secondary pollution of a water body is reduced.

Drawings

FIG. 1 is a schematic structural diagram of a preferred embodiment of the present invention;

FIG. 2 is a schematic structural view of a fiber ball filter according to a preferred embodiment of the present invention;

In the figure, a water collecting tank 1, an inclined net 2, a collecting tank 3, an oil-water separation tank 4, an oil discharge pipe 41, a first pH adjusting tank 5, a flocculation reaction tank 6, a first sedimentation tank 7, a fiber ball filter 8, a second pH adjusting tank 9, an anaerobic tank 10, a facultative tank 11, an aerobic tank 12, a second sedimentation tank 13, an MBR membrane filtration tank 14, a disinfection tank 15, a reuse water tank 16, a filter press 17, a sludge tank 18, an air blower 19, a COD detector 20, a tank body 81, a water inlet 82, a water outlet 83, a back flushing sewage outlet 84, an upper net plate 85, a lower net plate 86, a back flushing water inlet pipe 87, a water distributor 88, a flushing nozzle 89, a fiber ball filter material 90, a manhole 91, a supporting leg 92, a sewage pump 100, a pump 101, a sludge pump 102, a back flushing liquid inlet pump 103, a return pump 104, a dosing pump 105, a flat plate membrane filter 140, a first dosing mixer 200, a second dosing mixer 201, a third, a drain valve 300, a liquid inlet valve 301, a backflushing valve 302, a liquid outlet valve 303, a liquid outlet valve 304, a backflow valve 305, a backflushing drain valve 306, a backflushing drain pipe 400, a backflushing inlet pipe 401, a backflow pipeline 402 and a sludge main pipe 500.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand and understand, the present invention is further explained by combining with the specific drawings.

Example 1, referring to fig. 1 and 2, a sewage treatment system includes a water collecting tank 1, a first pH adjusting tank 5, a flocculation reaction tank 6, a first sedimentation tank 7, a fiber ball filter 8, an anaerobic tank 10, a facultative tank 11, an aerobic tank 12, a second sedimentation tank 13, an MBR membrane filtration tank 14, a disinfection tank 15, a reuse water tank 16, and a sludge treatment system, wherein an oil-water separation tank 4 is disposed between the water collecting tank 1 and the first pH adjusting tank 5, an inclined net 2 is disposed on the upper portion of the oil-water separation tank 4, an oil discharge pipe 41 is disposed on one side of the upper portion of the oil-water separation tank 4, a collection tank 3 corresponding to the outlet of the inclined net 2 is disposed on the inlet side of the oil-water separation tank 4, the outlet of the oil-water separation tank 4 is connected to the inlet of the first pH adjusting tank 5 through a pump 101, a first chemical feeding mixer 200 is disposed on a pipeline connecting the oil-water separation tank 4 and the first pH adjusting tank 5, the outlet of the first pH adjusting tank 5 is connected, a second dosing mixer 201 is arranged on a pipeline connecting the first pH adjusting tank 5 and the flocculation reaction tank 6, an outlet of the flocculation reaction tank 6 is connected with an inlet of the first sedimentation tank 7, an outlet of the first sedimentation tank 7 is connected with a water inlet of the fiber ball filter 8 through a liquid inlet pump 103 and a liquid inlet valve 301, a water outlet of the fiber ball filter 8 is connected with an inlet of the anaerobic tank 10 through a liquid outlet valve 303, an outlet of the anaerobic tank 10 is connected with an inlet of the facultative tank 11, an outlet of the facultative tank 11 is connected with the aerobic tank 12, an aeration pipe is arranged in the aerobic tank 12, the aeration pipeline is connected with an air blower 19, an outlet of the aerobic tank 12 is connected with an inlet of the second sedimentation tank 13, an outlet of the second sedimentation tank 13 is connected with an inlet of an MBR membrane filtration tank 14, a flat plate membrane filter 140 is arranged in the MBR membrane filtration tank 14, an outlet of the MBR membrane filtration tank 14 is connected with a reuse water tank 16 through a; the sludge treatment system comprises a filter press 17, a sludge tank 18, a sludge pump 102 and a sludge main pipe 500, a sewage outlet of the first pH adjusting tank 5, a sewage outlet of the flocculation reaction tank 6, a sewage outlet of the first sedimentation tank 7, a sewage outlet of the second sedimentation tank 13 and a sewage outlet of the MBR membrane filtering tank 14 are respectively connected with the sludge main pipe 500 through a sludge branch pipe and a sewage valve 300, an outlet of the sludge main pipe 500 is connected with an inlet of the sludge tank 18 through the sludge pump 102, an outlet of the sludge tank 18 is pumped to the filter press 17 through a pump, and a filtrate outlet of the filter press 17 is connected with an inlet of the sludge tank 18 through a pipeline.

further, a second pH adjusting tank 9 is arranged between the fiber ball filter 8 and the anaerobic tank 10, and a drain valve 303 and a third dosing mixer 202 are arranged on a pipeline connecting the second pH adjusting tank 9 and the fiber ball filter 8.

Further, the fiber ball filter comprises a tank 81, one side of the upper part of the tank 81 is provided with a water inlet 82, the other side of the upper part of the tank 81 is provided with a back flushing sewage outlet 84, the top of the tank 81 is provided with a back flushing water inlet pipe 87, the bottom of the tank is provided with a water outlet 83, one side of the upper part of the tank 81 is provided with a manhole 91, the bottom of the tank 81 is provided with supporting legs 92, the upper part and the lower part of the inner part of the tank 81 are respectively provided with an upper screen plate 85 and a lower screen plate 86, a fiber ball filter material packing layer is arranged between the upper screen plate 85 and the lower screen plate 86, a fiber ball filter material 90 is arranged in the fiber ball filter material packing layer, one end of the back flushing water inlet pipe 87 sequentially penetrates through the upper screen plate 85, the fiber ball filter material packing layer and the lower screen plate 86 from top to bottom to be connected with, the backwash sewage outlet 84 is returned to above the inclined wire 2 through the backwash sewage conduit 400 and the backwash sewage valve 306.

Further, a COD detector 20 is arranged on an outlet pipeline of the aerobic tank 12, the outlet pipeline of the aerobic tank 12 is divided into two paths after passing through the COD detector 20, one path is connected to the second sedimentation tank 13, and the other path flows back to the anaerobic tank 10 through a return pipeline 402, a return valve 305 and a return pump 104.

further, the supernatant of the sludge tank 18 is connected to the water collecting tank 1 through a pipe.

The utility model discloses sewage treatment process as follows:

sewage flows into a water collecting tank 1 automatically after passing through a grid, the sewage is lifted to a water tank at the upper end of an inclined net 2 through a sewage pump 100 and flows onto the inclined net from the water tank in a transverse distribution manner, larger objects filtered by the inclined net slide into a collecting tank 3 for collection, so that the function of primary interception is achieved, the sewage falls into an oil-water separation tank 3 through meshes of the inclined net 2, the oil-water separation tank further separates oil from water, the oil stain is discharged to an oil stain collecting barrel through an oil discharge pipe 41 for collection, the sewage enters a first pH adjusting tank 5 through a pump 101, is added into a first medicine adding mixer 200 through a pump 5, is mixed with medicine and then enters a first pH adjusting tank 5 so as to achieve the function of primary pH value adjustment, the sewage enters a flocculation reaction tank 6, and is added with coagulants (PAC and PAM) in a second medicine adding mixer 201 under the action of the coagulants (PAC and PAM) to enable colloids and fine suspended matters in the sewage to, then the sewage enters a first sedimentation tank 7 for sedimentation, and supernatant after sedimentation enters a fiber ball filter 8 to remove suspended matters in the sewage; the sewage filtered by the fiber ball filter 8 enters a second pH adjusting tank 9, the sewage can be added with drugs and mixed in a third drug adding mixer 202 and then enters the second pH adjusting tank 9, because the biological treatment is adopted, the pH value directly influences the activity of microorganisms, whether anaerobic bacteria or aerobic bacteria exist, the optimal living state is that the activity of the microorganisms is reduced in a neutral environment, namely about 7, when the pH value is in the neutral environment, the degradation capability of the microorganisms on organic matters is inhibited, therefore, the pH value is adjusted and controlled to be 6.5-7.5 so as to adapt to the working environment of subsequent anaerobic bacteria and aerobic bacteria, the sewage passes through an anaerobic tank 10 and a facultative tank 11, the aerobic tank 12 can carry out biochemical reaction during the period, the effective denitrification can be carried out, the organic matter structure is damaged, the purpose of reducing COD index is achieved, in order to prevent the COD index from not reaching the standard and discharging, a COD detector 20 is arranged on an outlet pipeline of the aerobic tank 12, and the sewage can be further introduced into a second sedimentation tank 13 after the COD detector 20 is qualified, if the water quality is unqualified, the water can flow back to the anaerobic tank 10 through the return pipe 402, the return valve 305 and the return pump 104, the supernatant of the second sedimentation tank 13 enters the MBR membrane filtering tank 14 for filtering, the flat plate membrane filter 140 can effectively intercept and filter refractory organic matters and impurities, the purpose of further purifying the water quality is achieved, the water passes through the MBR membrane filtering tank 14 and the disinfection tank 15, the bacteria are killed under the action of the ultraviolet sterilizing lamp, and then the water flows into the reuse water tank 16 for standby. It is worth noting that the reuse water tank 16 is connected with the backwashing water inlet pipe 87 through the pipeline, the backwashing pump 105 and the backwashing valve 302 to perform backwashing on the fiber ball filter, when in normal use, the liquid inlet pump 103 and the liquid inlet valve 301 are opened, and the backwashing sewage valve 306, the backwashing pump 105 and the backwashing valve 302 are closed; sewage enters the tank body 81 from the top down from the water inlet 82, is filtered by the fiber ball filter material 90 and then is discharged to the second pH adjusting tank 9 from the water outlet 83; during backwashing, the liquid inlet pump 103, the liquid inlet valve 301 and the liquid outlet valve 303 are closed, the backwashing sewage valve 306, the backwashing pump 105 and the backwashing valve 302 are opened, water in the reuse water tank 16 enters the water distributor 88 through the backwashing inlet pipe 401 and is sprayed out of the washing nozzle 89, backwashing is realized, sewage after backwashing returns to the upper part of the inclined net 2 through the backwashing sewage outlet 84 and the backwashing sewage outlet pipe 400, and water sources are saved; the sludge generated in each stage can be connected with the sludge main pipe 500 through the sludge branch pipe and the blowoff valve 300, the filtrate returns to the sludge tank 18 after being filter-pressed by the filter press, the supernatant of the sludge tank 18 returns to the water collecting tank 1 through the pipeline, and the filter cake is transported outside, so that the secondary pollution of the water body can be effectively reduced.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A sewage treatment system comprises a water collecting tank (1), a first pH adjusting tank (5), a flocculation reaction tank (6), a first sedimentation tank (7), a fiber ball filter (8), an anaerobic tank (10), a facultative tank (11), an aerobic tank (12), a second sedimentation tank (13), an MBR membrane filtration tank (14), a disinfection tank (15), a reuse water tank (16) and a sludge treatment system, and is characterized in that an oil-water separation tank (4) is arranged between the water collecting tank (1) and the first pH adjusting tank (5), an inclined net (2) is arranged at the upper part of the oil-water separation tank (4), an oil discharge pipe (41) is arranged at one side of the upper part of the oil-water separation tank (4), a collecting tank (3) corresponding to the outlet of the inclined net (2) is arranged at the side of the oil-water inlet of the oil-water separation tank (4), the outlet of the oil-water separation tank (4) is connected with the inlet of the first pH adjusting tank (5, a first medicine adding mixer (200) is arranged on a pipeline connecting the oil-water separation tank (4) and the first pH adjusting tank (5), an outlet of the first pH adjusting tank (5) is connected with an inlet of the flocculation reaction tank (6), a second medicine adding mixer (201) is arranged on a pipeline connecting the first pH adjusting tank (5) and the flocculation reaction tank (6), an outlet of the flocculation reaction tank (6) is connected with an inlet of the first sedimentation tank (7), an outlet of the first sedimentation tank (7) is connected with a water inlet of the fiber ball filter (8) through a liquid inlet pump (103) and a liquid inlet valve (301), a water outlet of the fiber ball filter (8) is connected with an inlet of the anaerobic tank (10) through a liquid outlet valve (303), an outlet of the anaerobic tank (10) is connected with an inlet of the facultative tank (11), an outlet of the facultative tank (11) is connected with an aeration tank (12), an aeration pipe is arranged in the aerobic tank (12), and an aerobic pipeline is connected with an air blower (19), an outlet of the aerobic tank (12) is connected with an inlet of a second sedimentation tank (13), an outlet of the second sedimentation tank (13) is connected with an inlet of an MBR membrane filtering tank (14), a flat membrane filter (140) is arranged in the MBR membrane filtering tank (14), an outlet of the MBR membrane filtering tank (14) is connected with a reuse water tank (16) through a disinfection tank (15), and an ultraviolet germicidal lamp is arranged in the disinfection tank (15); the sludge treatment system comprises a filter press (17), a sludge tank (18), a sludge pump (102) and a sludge main pipe (500), a sewage outlet of a first pH adjusting tank (5), a sewage outlet of a flocculation reaction tank (6), a sewage outlet of a first sedimentation tank (7), a sewage outlet of a second sedimentation tank (13) and a sewage outlet of an MBR membrane filtration tank (14) are respectively connected with the sludge main pipe (500) through a sludge branch pipe and a sewage valve (300), an outlet of the sludge main pipe (500) is connected with an inlet of the sludge tank (18) through the sludge pump (102), an outlet of the sludge tank (18) is pumped to the filter press (17) through a pump, and a filtrate outlet of the filter press (17) is connected with an inlet of the sludge tank (18) through a pipeline.

2. The sewage treatment system according to claim 1, wherein a second pH adjusting tank (9) is arranged between the fiber ball filter (8) and the anaerobic tank (10), and a drain valve (303) and a third dosing mixer (202) are arranged on a pipeline connecting the second pH adjusting tank (9) and the fiber ball filter (8).

3. The sewage treatment system according to claim 1, wherein the fiber ball filter comprises a tank body (81), a water inlet (82) is arranged on one side of the upper portion of the tank body (81), a back flush sewage outlet (84) is arranged on the other side of the upper portion of the tank body (81), a back flush water inlet pipe (87) is arranged on the top of the tank body (81), a water outlet (83) is arranged on the bottom of the tank body, a manhole (91) is arranged on one side of the upper portion of the tank body (81), supporting legs (92) are arranged on the bottom of the tank body (81), an upper screen plate (85) and a lower screen plate (86) are respectively arranged above and below the tank body (81), a fiber ball filter material filling layer is arranged between the upper screen plate (85) and the lower screen plate (86), a fiber ball filter material (90) is arranged in the fiber ball filter material filling layer, one end of the back flush water inlet pipe, the reuse water tank (16) is connected with the other end of the backwashing water inlet pipe (87) through a pipeline, a backwashing pump (105) and a backwashing valve (302), the water distributor (88) is of a circular structure, the upper surface of the water distributor (88) is provided with a washing nozzle (89), and the backwashing sewage outlet (84) returns to the upper part of the inclined net (2) through a backwashing sewage pipe (400) and a backwashing sewage valve (306).

4. the sewage treatment system according to claim 1, wherein the outlet pipeline of the aerobic tank (12) is provided with a COD detector (20), the outlet pipeline of the aerobic tank (12) is divided into two paths after passing through the COD detector (20), one path is connected with the second sedimentation tank (13), and the other path flows back to the anaerobic tank (10) through a return pipeline (402), a return valve (305) and a return pump (104).

5. a sewage treatment system according to claim 4, characterized in that the supernatant of the sludge basin (18) is connected to the collecting basin (1) by means of a pipe.