CN212024893U

CN212024893U - MBR membrane sewage treatment plant with automatic back flush function

Info

Publication number: CN212024893U
Application number: CN201922331020.8U
Authority: CN
Inventors: 杨泓; 杨朝虹; 庞一化; 李屹涵
Original assignee: Zhongji Hi Tech Chongqing Environmental Protection Engineering Co ltd
Current assignee: Zhongji Hi Tech Chongqing Environmental Protection Engineering Co ltd
Priority date: 2019-12-23
Filing date: 2019-12-23
Publication date: 2020-11-27
Anticipated expiration: 2029-12-23

Abstract

The utility model relates to a MBR membrane sewage treatment plant with automatic back flush function, including MBR membrane case, sump pit and high flush tank, high flush tank's level is higher than the level of sump pit, the level at the inner chamber top of sump pit is higher than the level of MBR membrane case, be equipped with the MBR membrane module in the MBR membrane case, MBR membrane case passes through outlet conduit and sump pit intercommunication, the last outlet valve that is equipped with of outlet conduit, the lower part of sump pit passes through the input intercommunication of intercommunication pipeline and suction pump, the output of suction pump passes through inlet conduit and high flush tank intercommunication, be equipped with inlet valve on the inlet conduit, be equipped with the drain pipe on the high flush tank. The utility model discloses a be located the gravity of the water of high flush tank, through the dead weight of water, carry the sump pit with water, then enter into the MBR membrane incasement and carry out the back flush to the MBR membrane module, avoided the use of back flush pump, practiced thrift the cost to occupation area has been reduced.

Description

MBR membrane sewage treatment plant with automatic back flush function

Technical Field

The utility model relates to a sewage treatment device technical field especially relates to a MBR membrane sewage treatment plant with automatic back flush function.

Background

The Membrane Bioreactor (MBR) is a high-efficiency water treatment process which organically combines a Membrane water treatment technology and a biological water treatment technology and is developed in recent years, and the Membrane Bioreactor replaces a secondary sedimentation tank sedimentation process of the traditional activated sludge process with a Membrane filtration process, and has the advantages of good effluent quality, high sludge concentration and the like. With the improvement of environmental protection requirements, MBR membrane bioreactors are widely applied to sewage treatment.

The membrane bioreactor can cause membrane pollution to membranes in the membrane bioreactor in the use process, namely, the deposition and accumulation of particles, colloidal particles, emulsion, macromolecules, salts and the like in feed liquid on the membranes on the membrane surface, and the crystallization and deposition of solutes passing through the membranes on the membrane surface and in membrane pores influence the filtration effect of the membranes. The technical scheme for solving the problems in the prior art is that a membrane is cleaned in a backwashing mode, a backwashing pump or a cam pump is adopted for backwashing in the same city, the backwashing pump or the cam pump is high in cost, the backwashing pump also has the problem of large occupied area, and although the cam pump is smaller in occupied area than the backwashing pump, the cam pump is high in failure rate in practical application.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that an MBR membrane sewage treatment device with simple structure, small floor area and low cost and an automatic back washing function is provided.

The utility model provides an above-mentioned technical problem's technical scheme as follows: the utility model provides a MBR membrane sewage treatment plant with automatic back flush function, includes MBR membrane case, sump pit and high flush tank, high flush tank's level is higher than the level of sump pit, the level at the inner chamber top of sump pit is higher than the level of MBR membrane case, MBR membrane incasement is equipped with the MBR membrane module, MBR membrane case pass through outlet conduit with the sump pit intercommunication, the last outlet valve that is equipped with of outlet conduit, the lower part of sump pit is passed through the intercommunication pipeline and is communicate with the input of suction pump, the output of suction pump pass through the inlet channel with high flush tank intercommunication, be equipped with inlet valve on the inlet channel, be equipped with the drain pipe on the high flush tank.

The utility model has the advantages that: the utility model discloses a be located the gravity of the water of high flush tank, through the dead weight of water, carry the sump pit with water, then enter into the MBR membrane incasement and carry out the back flush to the MBR membrane module, avoided the use of back flush pump, practiced thrift the cost to occupation area has been reduced.

On the basis of the technical scheme, the utility model discloses can also do following improvement.

Further, the one end that the suction pump was kept away from to the intercommunication pipeline is followed the top of sump pit stretches into in the sump pit and extend to bottom in the sump pit.

The beneficial effect of adopting the further scheme is that: the communicating pipe is communicated to the bottom of the water collecting well, so that water in the water collecting well can be extracted, and damage to the water collecting well when entering the water collecting well from the side wall of the water collecting well is avoided.

Further, still include the controller, the outlet valve with the inlet valve is the solenoid valve, the controller with the suction pump the outlet valve the inlet valve electricity is connected and is used for controlling respectively the opening and closing of suction pump the outlet valve the inlet valve.

The beneficial effect of adopting the further scheme is that: the controller controls the opening and closing of the water suction pump, the water outlet valve and the water inlet valve, and the operation is convenient and simple.

Further, be equipped with in the sump pit and be used for detecting the level gauge of the interior water yield of sump pit, be equipped with in the MBR membrane water tank and be used for detecting the level gauge of the interior water yield of MBR membrane water tank, two the level gauge all with the controller electricity is connected.

The beneficial effect of adopting the further scheme is that: the setting of level gauge can the real-time supervision water yield in the sump pit, and the opening and closing of inlet valve is controlled as required, avoids sump pit and MBR membrane water tank internal water too much to spill over.

Furthermore, the water outlet valve and the water inlet valve are both manual valves.

The beneficial effect of adopting the further scheme is that: the water outlet valve and the water inlet valve are in a normally open state and are only closed according to the requirement during maintenance. And the manual valve is low in cost and not easy to damage. When the water suction pump stops pumping water, accumulated water in the high-level water tank can automatically flow into the water collecting well, the water level in the water collecting well is raised to the height of the water level of the MBR membrane tank, and the membrane backwashing effect is achieved.

Further, the bottom of MBR membrane case inner chamber is for leaking hopper-shaped cavity, the bottom that leaks hopper-shaped cavity is equipped with the blow off pipe, be equipped with the blowoff valve on the blow off pipe.

The beneficial effect of adopting the further scheme is that: the arrangement of the funnel-shaped cavity and the sewage discharge pipe can facilitate the discharge of impurities in sewage.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention, in this embodiment, the water pump is a self-priming pump;

fig. 2 is a schematic structural diagram of another embodiment of the present invention, in this embodiment, the suction pump is a submersible pump.

In the drawings, the components represented by the respective reference numerals are listed below:

1. MBR membrane case, 2, sump pit, 3, head tank, 4, MBR membrane module, 5, outlet conduit, 6, outlet valve, 7, intercommunication pipeline, 8, suction pump, 9, inlet channel, 10, inlet valve, 11, drain pipe, 12, leak hopper-shaped cavity, 13, blow off pipe, 14, blowoff valve.

Detailed Description

The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.

As shown in fig. 1, the embodiment of the present invention includes an MBR membrane tank 1, a water collecting well 2 and a head tank 3, the level of the high-level water tank 3 is higher than that of the water collecting well 2, the level of the top of the inner cavity of the water collecting well 2 is higher than that of the MBR membrane tank 1, an MBR membrane module 4 is arranged in the MBR membrane tank 1, the MBR membrane tank 1 is communicated with the water collecting well 2 through a water outlet pipeline 5, the water outlet pipeline 5 is provided with a water outlet valve 6, the lower part of the water collecting well 2 is communicated with the input end of a water pump 8 through a communicating pipeline 7, in this embodiment, the water pump 8 is a self-priming pump, the output end of the water pump 8 is communicated with the high-level water tank 3 through a water inlet pipe 9, a water inlet valve 10 is arranged on the water inlet pipeline 9, a drain pipe 11 is arranged on the high-level water tank 3, in this embodiment, the level of the bottom of the high level water tank 3 and the level of the water collecting well 2 are embodied as follows: the horizontal height of the joint of the water inlet pipeline 9 and the high-level water tank 3 is higher than the top of the water collecting well 2, so that on one hand, the water in the high-level water tank 3 can conveniently enter the water collecting well 2 under the action of the dead weight of the water in the backwashing process, and on the other hand, the water suction pump 8 can be conveniently installed. The level that the horizontal height of sump pit 2 is higher than MBR membrane case 1 embodies: the level of the top of the MBR membrane tank 1 is lower than the level of the middle part of the water collecting well 2. Water is conveyed into the MBR membrane box 1 by the dead weight of the water to carry out back flushing on the MBR membrane module 4, so that a back flushing pump is avoided, and the cost and the occupied area are reduced.

In this embodiment, one end of the communication pipe 7, which is far away from the water pump 8, extends into the water collection well 2 from the top of the water collection well 2 and extends to the bottom of the water collection well 2. The communicating pipe 7 communicates to the bottom of the water collecting well 2, can extract water in the water collecting well 2, and avoids damaging the water collecting well 2 when entering the water collecting well 2 from the side wall of the water collecting well 2.

The utility model discloses an in an embodiment, it is preferred, still include the controller, outlet valve 6 with inlet valve 10 is the solenoid valve, the controller with the suction pump 8 outlet valve 6 inlet valve 10 electricity is connected and is used for controlling respectively the suction pump 8 outlet valve 6 inlet valve 10 opening and closing. The controller controls the water suction pump 8, the water outlet valve 6 and the water inlet valve 10 to be opened and closed, and the operation is convenient and simple. Preferably, be equipped with in the sump pit 2 and be used for detecting the level gauge of the interior water yield of sump pit 2, be equipped with in the MBR membrane water tank 1 and be used for detecting the level gauge of the interior water yield of MBR membrane water tank 1, two the level gauge with the controller electricity is connected. The setting of level gauge can real-time supervision sump pit 2 and the interior water yield of MBR membrane water tank 1, controls opening and closing of suction pump 8 as required, avoids sump pit 2 and the interior water of MBR membrane water tank 1 too much to spill over. During operation, at first the controller control outlet valve 6 opens, and the filterable water of MBR membrane case 1 enters into the sump 2, and when the water accumulation reaches certain degree in the sump 2 (at least water is for being higher than the height of the tip of intercommunication pipeline 7), the controller control suction pump 8 and inlet valve 10 open, carry the water in the sump 2 to high-order water tank 3 in. When backwashing is needed, the controller controls the water suction pump 8 to be closed and controls the water outlet valve 6 to be temporarily closed, water enters the water collecting well 2 under the action of self weight, when the water in the water collecting well 2 is higher than the MBR membrane box 1, the controller controls the water outlet valve 6 to be opened, and the water in the water collecting well 2 enters the MBR membrane box 1 to backwash the MBR membrane module 4.

In another embodiment of the present invention, the outlet valve 6 and the inlet valve 10 are both manual valves, and the outlet valve 6 and the inlet valve 10 are in a normally open state and are only closed as required during maintenance. Adopt manual valve with low costs, be difficult for appearing damaging, when the suction pump stopped drawing water, ponding in the high-order water 3 will flow into in the sump pit 2 automatically, promote the height of the water level in the sump pit 2 to MBR membrane case 1 water level, realize back flush membrane effect.

The preferred embodiment is: the bottom of the MBR membrane tank 1 inner chamber is funnel-shaped cavity 12, the bottom of funnel-shaped cavity 12 is equipped with blow off pipe 13, be equipped with blowoff valve 14 on the blow off pipe 13. The funnel-shaped chamber 12 and the sewage draining pipe 13 are arranged to facilitate the drainage of impurities in the sewage.

As shown in fig. 2, in the embodiment of the present invention, the suction pump 8 can replace the self-priming pump through the submersible pump, and the submersible pump is disposed at the bottom of the water collecting well 2, and the output end of the submersible pump is communicated with one end of the water inlet pipe 9, and the communication pipe 7 in the above-mentioned embodiment is cancelled.

The utility model has the advantages that: the utility model discloses a be located the gravity of the water of high flush tank 3, through the dead weight of water, carry water in the sump pit 2, then enter into MBR membrane case 1 and carry out the back flush to MBR membrane module 4, avoided the use of back flush pump, practiced thrift the cost to area occupied has been reduced.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. An MBR membrane sewage treatment device with an automatic back flushing function is characterized by comprising an MBR membrane tank (1), a water collecting well (2) and a high-level water tank (3), wherein the level of the high-level water tank (3) is higher than that of the water collecting well (2), the level of the top of an inner cavity of the water collecting well (2) is higher than that of the MBR membrane tank (1), an MBR membrane module (4) is arranged in the MBR membrane tank (1), the MBR membrane tank (1) is communicated with the water collecting well (2) through a water outlet pipeline (5), a water outlet valve (6) is arranged on the water outlet pipeline (5), the lower part of the water collecting well (2) is communicated with the input end of a water suction pump (8) through a communicating pipeline (7), the output end of the water suction pump (8) is communicated with the high-level water tank (3) through a water inlet pipeline (9), and a water inlet valve (10) is arranged on the water inlet pipeline (9), and a drain pipe (11) is arranged on the high-level water tank (3).

2. The MBR membrane sewage treatment unit with automatic back flushing function according to claim 1, wherein one end of the communication pipe (7) far away from the water suction pump (8) extends from the top of the water collection well (2) into the water collection well (2) and extends to the bottom of the water collection well (2).

3. The MBR membrane sewage treatment device with the automatic back flushing function according to claim 1 or 2, further comprising a controller, wherein the water outlet valve (6) and the water inlet valve (10) are both solenoid valves, and the controller is electrically connected with the water pump (8), the water outlet valve (6) and the water inlet valve (10) and is used for respectively controlling the opening and closing of the water pump (8), the water outlet valve (6) and the water inlet valve (10).

4. The MBR membrane sewage treatment device with automatic back flushing function according to claim 3, wherein a liquid level meter for detecting the amount of water in the water collecting well (2) is arranged in the water collecting well (2), and the liquid level meter is electrically connected with the controller.

5. The MBR membrane sewage treatment device with automatic back flushing function according to claim 1 or 2, wherein the water outlet valve (6) and the water inlet valve (10) are both manual valves.

6. The MBR membrane sewage treatment device with the automatic back flushing function according to claim 1 or 2, wherein the bottom of the inner cavity of the MBR membrane tank (1) is a funnel-shaped chamber (12), the bottom of the funnel-shaped chamber (12) is provided with a drain pipe (13), and the drain pipe (13) is provided with a drain valve (14).