CN215288412U - Sewage treatment system based on MABR membrane aeration bioreactor - Google Patents

Abstract

The utility model discloses a sewage treatment system based on an MABR membrane aeration bioreactor, which comprises a regulating tank, a facultative tank, an MABR tank, a mud-water separation tank, a coagulating sedimentation tank, a secondary sedimentation tank, a disinfection tank and a sludge storage tank; the sludge-water separation tank is internally provided with a separation device, and the separation device comprises a water inlet pipe, a water outlet pipe arranged on the sludge-water separation tank, a sludge discharge pipe arranged on the sludge-water separation tank, a baffle arranged on the sludge-water separation tank, a material conveying mechanism arranged on the baffle, a partition plate arranged on the sludge-water separation tank, a filter screen arranged on the sludge-water separation tank and a cleaning mechanism arranged on the sludge-water separation tank; the material conveying mechanism comprises a material conveying pipe, a shunt pipe arranged on the material conveying pipe, a shunt hole arranged on the shunt pipe, an anti-blocking component arranged on the shunt pipe and a scraping component arranged on the shunt pipe.

Description

Sewage treatment system based on MABR membrane aeration bioreactor

Technical Field

The utility model belongs to the technical field of sewage treatment, especially, relate to a sewage treatment system based on MABR membrane aeration bioreactor.

Background

The membrane aeration bioreactor is characterized in that an MABR membrane coupling component (carrier) is placed in a membrane pool, and the MABR membrane technology is a bubble-free aeration membrane technology, so that the aeration efficiency is high, and the utilization rate of microbial oxygen is close to 100%, the stable operation of the system can be realized only by low energy consumption in actual operation, and the diversity of microbial flora (nitrobacteria and denitrifying bacteria coexist) can be formed on the surface of the MABR membrane, so that the system can play a role in symbiotically coordinating and degrading pollutants (COD, BOD, ammonia nitrogen, TN and the like) in the MABR pool, and has the outstanding characteristics of better effluent quality and lower energy consumption in the same reaction time and temperature.

However, in the sludge-water separation part of the sewage treatment system of the membrane aeration bioreactor, sludge is separated from water in the prior art by a sedimentation mode, and the mode needs the sludge to slowly sink to the bottom of the separation tank, so that the working efficiency is slow.

SUMMERY OF THE UTILITY MODEL

The utility model provides an overcome the not enough of prior art, provide a sewage treatment system based on MABR membrane aeration bioreactor of high-efficient separation.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a sewage treatment system based on an MABR membrane aeration bioreactor comprises a regulating tank, a facultative tank, an MABR tank, a mud-water separation tank, a coagulating sedimentation tank, a secondary sedimentation tank, a disinfection tank and a sludge storage tank; the sludge-water separation tank is internally provided with a separation device, and the separation device comprises a water inlet pipe, a water outlet pipe arranged on the sludge-water separation tank, a sludge discharge pipe arranged on the sludge-water separation tank, a baffle arranged on the sludge-water separation tank, a material conveying mechanism arranged on the baffle, a partition plate arranged on the sludge-water separation tank, a filter screen arranged on the sludge-water separation tank and a cleaning mechanism arranged on the sludge-water separation tank; the material conveying mechanism comprises a material conveying pipe, a flow dividing pipe arranged on the material conveying pipe, a flow dividing hole arranged on the flow dividing pipe, an anti-blocking component arranged on the flow dividing pipe and a scraping component arranged on the flow dividing pipe; the anti-blocking assembly comprises an anti-blocking plate, an anti-blocking block arranged on the anti-blocking plate, an anti-blocking sliding groove arranged on the flow dividing pipe, an anti-blocking spring arranged on the anti-blocking block, a sliding rod arranged on the mud-water separation tank, a sliding groove arranged on the mud-water separation tank, an extrusion block arranged on the sliding rod and a positioning component arranged on the mud-water separation tank; collecting the sewage treated by the grating in an adjusting tank, and when the water level is higher than a liquid level switch of a lifting pump, starting the lifting pump to lift the sewage to a facultative tank; in the facultative tank, aerobic microorganisms and anoxic microorganisms carry out primary degradation on pollutants, the COD of the inlet water is higher at the stage, and a better denitrification process can be realized under the condition of not adding an additional carbon source; after sewage enters the MABR tank, the sewage is subjected to full contact reaction with an MABR membrane coupling carrier biological membrane, and the running condition of a fan is controlled by a dissolved oxygen monitor, so that the dissolved oxygen in the membrane tank fluctuates within the range of 0.5-2.0mg/L, the membrane tank is in an anoxic and aerobic alternative running state, deep degradation of COD and BOD is realized in the membrane tank, and a nitrification-denitrification synchronous biochemical reaction is performed; the mud-containing mixed liquid enters the mud-water separation tank through the water inlet pipe, mud and water need to pass through the bottom of the baffle plate through the baffle plate, and the precipitator is diffused into water conveyed by the water inlet pipe through the shunting holes on the shunting pipes on the conveying pipes, so that the mud and water passing through the mud-water separation tank are precipitated in an all-around manner; clean water in the mud-water separation tank is accumulated upwards after mud and water are precipitated, and the clean water finally flows into a reservoir of the mud-water separation tank after being filtered by a filter screen arranged at the upper end of a partition plate and finally is discharged out of the mud-water separation tank through a water outlet pipe; the supernatant with most indexes reaching the standard enters the next working procedure; after the supernatant enters a dosing coagulation reaction tank, adding PAM and a phosphorus removing agent through a dosing device, fully stirring and mixing in the tank, and then entering a secondary sedimentation tank; precipitating in a secondary sedimentation tank, and removing suspended matters and total phosphorus through precipitation and sludge discharge to ensure that all main indexes in the system reach the discharge standard; finally, the effluent is disinfected; sludge in the sludge storage tank is periodically transported outwards or dewatered; when the shunt pipe is used for a long time, a large amount of soil is adhered to the shunt pipe; at the moment, the positioning component can slide the slide rod to slide in the sliding groove, the anti-blocking plate is extruded through the inclined plane of the extrusion block on the slide rod, the anti-blocking plate slides in the anti-blocking sliding groove, and after the anti-blocking block is plugged in the shunt hole, the mud on the outer surface of the shunt pipe is scraped through the scraping assembly.

Further, the positioning component comprises a rotating block, a torsion spring arranged on the rotating block, a rotating groove arranged on the mud-water separation tank and a groove arranged on the sliding rod; the rotating block rotates to a groove clamped on the end part of the sliding rod, and the anti-blocking block is positioned at the position extruded by the anti-blocking plate through the fixed column extrusion block, so that the anti-blocking block is always blocked on the shunting hole.

Further, the scraping component comprises a scraper, a scraper arranged on the scraper, a scraper groove arranged on the mud-water separation tank, a water baffle arranged on the scraper, a water baffle groove arranged on the mud-water separation tank, a limiting sliding groove arranged on the mud-water separation tank and a limiting part arranged on the mud-water separation tank; the scraper slides in the scraper groove and can drive the scraper to scrape off the mud on the shunt tube.

Furthermore, the limiting part comprises a limiting block, a limiting spring arranged on the limiting block and a handle arranged on the limiting block; the position of the scraper can be blocked by the limiting block, and the scraper is prevented from blocking the shunting hole in the process of inputting the precipitator.

Further, the cleaning mechanism comprises a motor, a gear arranged on the motor, a rack arranged on the mud-water separation tank, a cleaning rod arranged on the rack, a shifting sheet arranged on the cleaning rod, a cleaning chute arranged on the mud-water separation tank, a sealing plate arranged on the cleaning rod, a sealing plate chute arranged on the mud-water separation tank, an inner rack arranged on the mud-water separation tank and an inner gear arranged on the cleaning rod; the motor drives the gear to rotate, and the gear can drive the rack to move upwards; the rack drives the cleaning rod which can rotate on the rack to move upwards, the cleaning rod is rotated by the meshing of the inner rack on the inner wall of the mud-water separation tank and the inner gear on the cleaning rod, and the mud adhered on the filter screen is vibrated down by the plectrum on the rotating cleaning rod; when the rack moves to the uppermost end, the gear is not meshed with the rack, and the inner rack is meshed with the inner gear to drive the gear to fall at a constant speed so as to perform reciprocating cleaning; not only saves time, but also improves the cleaning efficiency.

In summary, the utility model can rapidly deposit the soil in the muddy water through the arrangement of the material conveying mechanism, thereby improving the working efficiency of the muddy water separation tank; through the arrangement of the anti-blocking component and the scraping component, soil on the material conveying mechanism can be cleaned, and the soil is prevented from blocking the diffusion of the precipitator; through the setting of clearance mechanism, can prevent that the filter screen from blockking up, improve the filter effect and the efficiency of filter screen.

Drawings

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

FIG. 2 is a schematic structural diagram of a mud-water separation tank.

FIG. 3 is a side view of the mud-water separation tank.

Fig. 4 is a cross-sectional view taken at a-a of fig. 3.

Fig. 5 is a sectional view taken at B-B of fig. 3.

Fig. 6 is an enlarged view of fig. 5 at D.

FIG. 7 is a rear view of the mud-water separation tank.

Fig. 8 is an enlarged view of fig. 7 at E.

Fig. 9 is a sectional view at C-C of fig. 7.

Fig. 10 is an enlarged view of fig. 9 at F.

Detailed Description

As shown in fig. 1-10, a sewage treatment system based on an MABR membrane aeration bioreactor comprises a regulating tank 1, a facultative tank 10, an MABR tank 11, a mud-water separation tank 12, a coagulating sedimentation tank 13, a secondary sedimentation tank 14, a disinfection tank 15 and a sludge storage tank 16; a lift pump 17 is arranged in the adjusting tank 1; a sludge return pipe 18 is connected in the facultative tank 10 in a butt joint mode, and the sludge return pipe 18 is connected with a sludge return pump 19 in the mud-water separation tank 12 in a butt joint mode; at least 1 MABR membrane module 7, an aeration disc 71 and a DO monitor 72 are arranged in the MABR membrane tank 11; the MABR membrane component 7 is connected with an MABR membrane oxygen supply fan 73, a tail gas discharge port is arranged on the MABR membrane component 7, and the front end of the discharge port is provided with a regulating valve through which the pressure in the MABR membrane cavity can be controlled; the aeration disc 71 is connected with an aeration stirring fan; the aeration stirring fan is generally set to aerate and stir for a plurality of times in one hour and is linked with the DO monitor 72 to control the DO value in the MABR tank 11 to be 0.5-2.5mg/L, preferably 0.5-1.5 mg/L; a stirrer 8 is arranged in the coagulating sedimentation tank 13, and the liquid medicine added from the medicine adding device 91 is stirred and is subjected to full coagulation reaction with raw water; the added liquid medicine is at least one of a phosphorus removing agent, PAM, PAC and an inorganic salt coagulant aid; the secondary sedimentation tank 14 is provided with a sludge discharge pump; 2 pumps are arranged in the sludge storage tank 16, one excess sludge pump 9 conveys excess sludge to outside or to subsequent sludge dewatering equipment, and the other excess sludge pump is a supernatant liquid reflux pump 90 which refluxes supernatant liquid to the coagulating sedimentation tank 13.

Specifically, a separation device is arranged in the mud-water separation tank, and the separation device comprises a water inlet pipe 2, a water outlet pipe 20, a mud discharge pipe 21, a baffle 22, a material conveying mechanism, a partition plate 23, a filter screen 24 and a cleaning mechanism; the upper end of the side wall at one side of the mud-water separation tank 12 is fixedly communicated with a water inlet pipe 2; a sludge discharge pipe 21 is fixedly communicated with the lower end of the side wall at one side of the sludge-water separation tank 12; the lower end of the side wall at the other side of the mud-water separation tank 12 is fixedly communicated with a water outlet pipe 20; the upper ends of two opposite side walls of the mud-water separation tank 12 are fixedly connected with the same baffle plate 22; the center of two opposite side walls of the mud-water separation tank 12 is fixedly connected with the same partition plate 23; the filter screen 24 is a conventional filter screen and is located at the upper end of the partition plate 23.

Specifically, the material conveying mechanism comprises a material conveying pipe 3, a shunt pipe 30, a shunt hole 31, an anti-blocking assembly and a scraping assembly; the feed delivery pipe 3 is embedded in the baffle 22; a liquid booster pump is arranged on the surface of the material conveying pipe 3; the lower end of the material conveying pipe 3 is fixedly communicated with a shunt pipe 30, and the surface of the shunt pipe 30 is provided with a plurality of shunt holes 31.

Specifically, the anti-blocking assembly comprises an anti-blocking plate 32, an anti-blocking block 33, an anti-blocking chute 34, an anti-blocking spring 35, a sliding rod 36, a chute 37, an extrusion block 38 and a positioning component; the anti-blocking blocks 33 are uniformly arranged on the anti-blocking blocks 32 corresponding to the diversion holes 31; one end of the anti-blocking plate 32 can slide in the anti-blocking chute 34; one end of the anti-blocking spring 35 is fixedly connected to the top surface of the anti-blocking plate 32, and the other end is fixedly connected to the inner wall of the shunt tube 30; the slide bar 36 can slide in a chute 37 on the mud-water separation tank 12; the extrusion block 38 is uniformly fixed on the sliding rod 36 corresponding to the shunt tubes 30, and the bottom of the boundary of the anti-blocking plate 32 is abutted against the inclined surface of the extrusion block 38; the positioning component comprises a rotating block 4, a torsion spring 40, a rotating groove 41 and a groove 42; the rotating block 4 can rotate on the mud-water separation tank 12; one end of the torsion spring 40 is fixedly connected to the bottom of the rotating groove 41, and the other end is fixedly connected to the inner wall of the rotating block 4; the groove 42 may catch the rotation block 4.

Specifically, the scraping component comprises a scraper 5, a scraper 50, a scraper groove 51, a water baffle 52, a water baffle groove 53, a limiting sliding groove and a limiting part; the scraper 5 can slide in a scraper groove 51 on the mud-water separation tank 12; the water baffle plate 52 can slide in a water baffle plate groove 53 on the mud-water separation tank 12; the scraper 50 is sleeved on the shunt tube 30 and connected together through the scraper 5; the limiting sliding chute is positioned in the middle of the transverse plate at the upper end of the scraper groove 51; the limiting part comprises a limiting block 55, a limiting spring 56 and a handle 57; the limiting block 55 can slide in the limiting sliding groove; one end of the limiting spring 46 is fixedly connected to the annular top surface of the limiting block 55, and the other end of the limiting spring is fixedly connected to the bottom of the transverse plate; the handle 57 is fixedly connected to the upper end of the stopper 55.

Specifically, the cleaning mechanism comprises a motor 6, a gear 60, a rack 61, a cleaning rod 62, a shifting sheet 63, a cleaning chute, a sealing plate 65, a sealing plate chute 66, an internal rack 67 and an internal gear 68; the motor 6 is fixedly connected to the rear wall of the mud-water separation tank 12; the gear 60 is a gear having only general teeth; can rotate on the mud-water separation tank 12 and is fixedly connected with the rotating end of the motor 6; the rack 61 can slide up and down on the mud-water separation tank 12; the shifting sheet 63 is uniformly arranged on the cleaning rod 62; the cleaning rod 62 can slide up and down in the cleaning chute; the sealing plate 65 is slidable in the sealing slide groove 66; the inner rack 67 is fixedly connected to the inner wall of the mud-water separation tank 12; an internal gear 68 on the purge rod 62 may be engaged with the internal rack 67.

The working principle is as follows: the sewage treated by the grating is collected in the adjusting tank 1, and when the water level is higher than a liquid level switch of a lifting pump, the lifting pump is started to lift the sewage to the facultative tank 10; in the facultative tank 10, aerobic microorganisms and anoxic microorganisms carry out primary degradation on pollutants, the COD of the inlet water is higher at the stage, and a better denitrification process can be realized under the condition of not adding an additional carbon source; after entering the MABR tank 11, sewage is subjected to full contact reaction with an MABR membrane coupling carrier biological membrane, and the running condition of a fan is controlled by a dissolved oxygen monitor, so that the dissolved oxygen in the membrane tank fluctuates within the range of 0.5-2.0mg/L, the membrane tank is in an anoxic and aerobic alternative running state, deep degradation of COD and BOD is realized in the membrane tank, and a nitrification-denitrification synchronous biochemical reaction is performed; the mud-containing mixed liquid enters the mud-water separation tank 12 through the water inlet pipe 2, mud and water need to pass through the bottom of the baffle 22 through the baffle 22, and the precipitator is diffused into the water conveyed by the water inlet pipe 2 through the diversion holes 31 on the diversion pipes 30 on the material conveying pipe 3, so that the mud and water passing through the mud-water separation tank 12 are precipitated in all directions; the relatively clean water after the mud and water sedimentation in the mud and water separation tank 12 is accumulated upwards, and the relatively clean water finally flows into a reservoir of the mud and water separation tank 12 after being filtered by a filter screen 24 arranged at the upper end of a partition plate 23 and is finally discharged out of the mud and water separation tank 12 through a water outlet pipe; the supernatant with most indexes reaching the standard enters the next working procedure; after the supernatant enters a dosing coagulation reaction tank 13, PAM and a phosphorus removing agent are dosed through a dosing device, fully stirred in the tank, mixed and reacted, and then enters a secondary sedimentation tank 14; precipitating in a secondary sedimentation tank 14, and removing suspended matters and total phosphorus through precipitation and sludge discharge so that all main indexes in the system reach the discharge standard; finally, the effluent is disinfected; the sludge in the sludge storage tank 16 is periodically transported outwards or dewatered.

After long-term use, a large amount of soil is adhered to the shunt pipe 30, and at the moment, the shunt pipe can be rotated to the groove 42 clamped on the end part of the sliding rod 36 through the rotating block 4, so that the position of the extrusion block 38 for extruding the anti-blocking plate 32 can be fixed, and the anti-blocking block 33 is always blocked on the shunt hole 31; the scraper 5 slides in the scraper groove 51, and the scraper 50 can be driven to scrape off the soil on the shunt tube 30.

The motor 6 drives the gear 60 to rotate, and the gear 60 can drive the rack 61 to move upwards; the rack 61 drives the cleaning rod 62 which can rotate on the rack to move upwards, the cleaning rod 62 rotates through the meshing of the internal rack 67 on the inner wall of the mud-water separation tank 12 and the internal gear 68 on the cleaning rod 62, and the mud adhered on the filter screen 24 is shaken off through the plectrum 63 on the rotating cleaning rod 62; when the rack 61 moves to the uppermost end, the gear 60 is not meshed with the rack 61, and the filter screen 24 can be cleaned in a reciprocating manner by driving the inner rack 67 to fall at a constant speed by meshing with the inner gear 68.

Claims (5)

1. A sewage treatment system based on an MABR membrane aeration bioreactor comprises a regulating tank (1), a facultative tank (10), an MABR tank (11), a mud-water separation tank (12), a coagulating sedimentation tank (13), a secondary sedimentation tank (14), a disinfection tank (15) and a mud storage tank (16); the method is characterized in that: the mud-water separation tank is internally provided with a separation device, and the separation device comprises a water inlet pipe (2), a water outlet pipe (20) arranged on the mud-water separation tank, a sludge discharge pipe (21) arranged on the mud-water separation tank, a baffle (22) arranged on the mud-water separation tank, a material conveying mechanism arranged on the baffle, a partition plate (23) arranged on the mud-water separation tank, a filter screen (24) arranged on the mud-water separation tank and a cleaning mechanism arranged on the mud-water separation tank; the material conveying mechanism comprises a material conveying pipe (3), a shunt pipe (30) arranged on the material conveying pipe, a shunt hole (31) arranged on the shunt pipe, an anti-blocking component arranged on the shunt pipe and a scraping component arranged on the shunt pipe; prevent blockking up the subassembly including preventing jam plate (32), locating prevent on the jam plate blockking up piece (33), locate prevent stifled spout (34) on the shunt tubes, locate prevent stifled spring (35) on the blockking up piece, locate slide bar (36) on the mud-water separation pond, locate spout (37) on the mud-water separation pond, locate extrusion piece (38) on the slide bar and locate locating positioning element on the mud-water separation pond.

2. The sewage treatment system based on the MABR membrane aeration bioreactor as claimed in claim 1, wherein: the positioning component comprises a rotating block (4), a torsion spring (40) arranged on the rotating block, a rotating groove (41) arranged on the mud-water separation tank and a groove (42) arranged on the sliding rod.

3. The sewage treatment system based on the MABR membrane aeration bioreactor as claimed in claim 1, wherein: the scraping component comprises a scraper (5), a scraper (50) arranged on the scraper, a scraper groove (51) arranged on the mud-water separation tank, a water baffle (52) arranged on the scraper, a water baffle groove (53) arranged on the mud-water separation tank, a limiting sliding groove arranged on the mud-water separation tank and a limiting part arranged on the mud-water separation tank.

4. The sewage treatment system based on the MABR membrane aeration bioreactor as claimed in claim 3, wherein: the limiting part comprises a limiting block (55), a limiting spring (56) arranged on the limiting block and a handle (57) arranged on the limiting block.

5. The sewage treatment system based on the MABR membrane aeration bioreactor as claimed in claim 1, wherein: the cleaning mechanism comprises a motor (6), a gear (60) arranged on the motor, a rack (61) arranged on the mud-water separation tank, a cleaning rod (62) arranged on the rack, a shifting sheet (63) arranged on the cleaning rod, a cleaning sliding groove arranged on the mud-water separation tank, a sealing plate (65) arranged on the cleaning rod, a sealing plate sliding groove (66) arranged on the mud-water separation tank, an inner rack (67) arranged on the mud-water separation tank and an inner gear (68) arranged on the cleaning rod.

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