CN219002626U

CN219002626U - MBR backwash system

Info

Publication number: CN219002626U
Application number: CN202320098392.4U
Authority: CN
Inventors: 苗雪娜; 刘杨; 连宝良; 张忻; 陈敬; 齐亚玲; 李传举
Original assignee: Beijing Shouchuang Ecological Environmental Protection Group Co ltd
Current assignee: Beijing Shouchuang Ecological Environmental Protection Group Co ltd
Priority date: 2023-02-01
Filing date: 2023-02-01
Publication date: 2023-05-12
Anticipated expiration: 2033-02-01

Abstract

The utility model relates to the technical field of sewage treatment, in particular to an MBR backwashing system. The utility model provides an MBR backwashing system, which comprises an MBR tank, a water producing pump and a high-level water tank, wherein the MBR tank is positioned below the high-level water tank; the water inlet end of the water producing pump is communicated with the MBR membrane assembly, the water outlet end of the water producing pump is communicated with the water inlet end of the high-level water tank, and the water outlet end of the high-level water tank is communicated with the MBR pool membrane assembly. Compared with the prior art, the MBR backwashing system provided by the utility model has the advantages that the backwashing water pump is canceled, and clear water automatically flows into the MBR membrane module under the gravity action of the high-level water tank, so that the MBR membrane yarn soaking and cleaning effects as in the prior art are realized, and the effects of saving investment, saving energy and reducing consumption are achieved.

Description

MBR backwash system

Technical Field

The utility model relates to the technical field of sewage treatment, in particular to an MBR backwashing system.

Background

The existing MBR backwashing device consists of a backwashing water pump, a low-level water tank, a cleaning pipeline and other parts, and is a cleaning system for periodically and reversely injecting and cleaning the polluted MBR membrane group device to recover flux of the membrane group device. As shown in fig. 1: in the existing cleaning system, the backwash pump 3 pumps the clean water after membrane filtration from the low-level water tank 14, and the clean water is reversely injected into the membrane wires of the membrane group device through the water suction pipe of the water producing pump 4, so that the membrane group device is cleaned. The backwashing device needs to use a backwashing pump 3 to pump clean water, consumes electric energy and increases investment.

Therefore, there is a need for an MBR backwash system that eliminates the backwash pump 3 arrangement.

Disclosure of Invention

First, the technical problem to be solved

In view of the above-mentioned drawbacks and shortcomings of the prior art, the present utility model provides an MBR backwash system, which solves the technical problems of high backwash pump energy consumption and high purchase price in the MBR backwash system.

(II) technical scheme

In order to achieve the above purpose, the main technical scheme adopted by the utility model comprises the following steps:

1. an MBR backwashing system comprises an MBR tank, a water producing pump and a high-level water tank, wherein the MBR tank is positioned below the high-level water tank; the MBR tank is internally provided with a membrane component, the water inlet end of the water producing pump is communicated with the membrane component in the MBR tank, the water outlet end of the water producing pump is communicated with the water inlet end of the high-level water tank, and the water outlet end of the high-level water tank is communicated with the membrane component in the MBR tank.

Preferably, the head tank and the MBR tank have a water level difference of 7-8 meters.

Preferably, the MBR pool membrane component comprises a membrane tank, a water collecting pipe, membrane elements, a membrane frame, a first water pipe and a second water pipe, wherein a plurality of membrane elements are arranged in the membrane tank through a plurality of membrane frames; the upper end of each membrane frame is provided with a first water pipe which is communicated with a water collecting pipe, and a second water pipe is arranged on the water collecting pipe.

Preferably, the water inlet end of the water producing pump is communicated with a second water pipe in the membrane assembly in the MBR tank.

Preferably, a first pipeline and a second pipeline are connected between the water inlet end of the water producing pump and the MBR tank, a first pipeline and a third pipeline are connected between the MBR tank and the high-level water tank, and the first pipeline, the second pipeline and the third pipeline are connected through a three-way valve.

Preferably, a pre-pump water producing valve is arranged on the second pipeline.

Preferably, the third pipeline is provided with an automatic cleaning regulating valve.

Preferably, a fourth pipeline is connected between the water producing pump and the high-level water tank, and a post-pump water producing valve is arranged on the fourth pipeline.

(III) beneficial effects

The beneficial effects of the utility model are as follows: compared with the prior art, the MBR backwashing system provided by the utility model has the advantages that the backwashing water pump is canceled, and meanwhile, the clear water automatically flows into the MBR pool membrane assembly by utilizing the gravity action of the high-level water tank, so that the effects of immersing and cleaning the MBR membrane element as in the prior art are realized, and the effects of saving investment, saving energy and reducing consumption are achieved.

Preferably, the automatic cleaning regulating valve controls the backwash water quantity by regulating the opening degree, and the operation is flexible and easy to operate and control.

Preferably, the three-way valve controls the liquid direction, and the three-way valve is matched with the front water producing valve of the pump, so that a guarantee is added for pipeline control.

Drawings

FIG. 1 is a prior art MBR backwash system;

FIG. 2 is a schematic illustration of an MBR backwash system of the present utility model;

FIG. 3 is a schematic view of a membrane module according to the present utility model;

FIG. 4 is a schematic view of a membrane element according to the present utility model.

Description of the reference numerals

1: a membrane element; 2: an MBR pool; 3: a backwash pump; 4: a water producing pump; 5: a high level water tank; 6: automatically cleaning the regulating valve; 7: a water valve is produced after the pump; 8: a water producing valve in front of the pump; 9: a three-way valve; 10: a first pipeline; 11: a second pipeline; 12: a third pipeline; 13: a fourth pipeline; 14: a low-level pool; 15: a membrane box; 16: a water collecting pipe; 17: a membrane frame; 18: a first water pipe; 19: and a second water pipe.

Detailed Description

The utility model will be better explained by the following detailed description of the embodiments with reference to the drawings.

The MBR backwashing system provided by the embodiment of the utility model adopts the high-level water tank 5, and clean water automatically flows into a pipeline under the action of gravity. The backwash pump 3 is canceled, so that the investment and the energy consumption are saved; the MBR tank 2 is built underground, so that the effect of saving occupied space can be achieved.

Taking a water plant of 1 ten thousand tons/d as an example: the backwash pump 3 is started for 30min every day by a single backwash pump 3 of 25 kw. The consumption of 25 (30/60) 365=4562 kw.h in one year, and the electricity charge is saved by 2433, 0.8=3650 yuan/year according to the electric calculation of 0.8 yuan/degree; meanwhile, in the existing backwashing system, two backwashing pumps 3 are adopted and assembled into the system together, and one backwashing pump is used for one backwashing pump. One backwash pump 3 has a selling price of 3.5 and Mo Zuo, and the purchase cost is saved by about 7 ten thousand.

In order that the above-described aspects may be better understood, exemplary embodiments of the present utility model will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present utility model are shown in the drawings, it should be understood that the present utility model may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the utility model to those skilled in the art.

Example 1

Conventional sewage treatment plants are built on the ground, but the sewage construction land is limited by various factors, and the ground sewage treatment has a great influence on the surrounding environment. The underground sewage treatment plant is built, and the overground space is fully utilized, so that the aim of saving land resources can be fulfilled.

The utility model provides an MBR backwashing system, which comprises an MBR tank 2, a water producing pump 4 and a high-level water tank 5, wherein the MBR tank 2 is positioned below the high-level water tank 5; be equipped with the membrane module in the MBR pond 2, produce water pump 4 water inlet end and the membrane module intercommunication in the MBR pond 2, produce water pump 4 water outlet end and high-order water tank 5 water inlet end intercommunication, high-order water tank 5 water outlet end and the membrane module intercommunication in the MBR pond 2. The MBR tank 2 is positioned below the high-level water tank 5, so that a backwash water pump is canceled, and clean water automatically flows into the MBR tank under the gravity action of the high-level water tank. Compared with the prior art, the backwashing water pump is canceled, and the clean water automatically flows into the MBR pool membrane element by utilizing the gravity action of the high-level water tank, so that the MBR membrane wire soaking and cleaning effects which are the same as the prior art are realized, and the effects of saving investment, energy conservation and consumption reduction are achieved.

The MBR tank 2 is arranged in a sewage tank to be treated and is used for purifying sewage. The MBR tank 2 is built in the underground negative two layers, and a water producing pump 4 is arranged near the MBR tank 2 and is used for pumping purified water into a high-level water tank 5. The high-level water tank 5 is arranged on the ground, so that the clean water can be conveniently used. Meanwhile, an operation space is arranged on the underground negative layer, a sewage treatment dosing room, a blower room, a power distribution room and a PLC control system are arranged, and a channel is further arranged to be connected with a road outside the factory.

An MBR membrane module is arranged in the MBR tank 2 and comprises a membrane tank 15, a water collecting pipe 16, membrane elements 1, a membrane frame 17, a first water pipe 18 and a second water pipe 19, wherein a plurality of membrane elements 1 are arranged in the membrane tank 15 through a plurality of membrane frames 17; the membrane frame 17 is vertically installed in the membrane tank 15 and is fixed by positioning grooves on the upper and lower beams of the membrane tank 15. The upper end of each membrane frame 17 is provided with a first water pipe 18, the first water pipe 18 is communicated with a water collecting pipe 16, and the water collecting pipe 16 is provided with a second water pipe 19. The second water pipe 19 is provided with a flange, and is connected with an external pipeline through the flange. The first water pipe 18 is used to connect the membrane element 1 with the water collection pipe 16.

Specifically, the membrane element 1, namely a hollow fiber membrane, also called membrane wire, is used for intercepting and removing pollutants; water collection pipe 16: collecting produced water of each hollow fiber membrane and connecting the produced water with an external pipeline through a flange; film frame 17: for fixing the membrane element 1; still be provided with the aeration case: the main functions are air-water mixing, scouring the surface of the membrane and slowing down or preventing membrane pollution.

The water inlet end of the water producing pump 4 is communicated with a second water pipe 19 in the membrane component in the MBR tank 2. A first pipeline 10 and a second pipeline 11 are connected between the water inlet end of the water producing pump 4 and the MBR tank 2, a first pipeline 10 and a third pipeline 12 are connected between the MBR tank 2 and the head tank 5, and the first pipeline 10, the second pipeline 11 and the third pipeline 12 are connected through a three-way valve.

A fourth pipeline 13 is connected between the water producing pump 4 and the high-level water tank 5, and a post-pump water producing valve 7 is arranged on the fourth pipeline 13 and used for controlling the water flow when entering the water tank.

The second pipeline 11 is provided with a water producing valve 8 before the pump, which is not only used for controlling the water flow when entering the water producing pump 4; meanwhile, when the membrane element 1 is cleaned, the front water producing valve 8 of the pump is kept in a closed state, so that clean water can be prevented from entering the second pipeline 11, and water source waste is avoided. The front water producing valve 8 and the three-way valve 9 are matched in a cooperative manner to provide control and guarantee for a water source in a pipeline.

The water level difference between the high-level water tank 5 and the MBR tank 2 is 7-8 meters. Setting a height difference of 7-8 meters, firstly, according to the setting requirement of the whole sewage plant project, using a natural relief height difference to take the overground high-level water tank 5 as a clean water tank; secondly, the 7-8 m height does not increase the stroke of the water producing pump 4, so that the extra energy consumption is not increased; clean water is released into the MBR pool 2 of the negative two layers through a pipeline by utilizing gravitational potential energy of 7-8 meters, and the membrane element 1 is soaked and cleaned.

The three-way valve 9 controls the direction of the liquid flow. When clear water needs to be stored, the first pipeline 10 and the second pipeline 11 are communicated through the three-way valve 9, the third pipeline 12 is kept closed, and the fourth pipeline 13 is opened. The sewage is filtered by the inner membrane element 1 of the MBR tank 2 and purified into clear water, and the clear water is conveyed to the high-level water tank 5 through the water producing pump 4, and the high-level water tank 5 is used for storing the clear water. When the membrane element 1 needs to be cleaned, the first pipeline 10 is controlled to be connected with the third pipeline 12 through the three-way valve 9, the second pipeline 11 and the fourth pipeline 13 are kept in a closed state, clean water in the high-level water tank 5 positioned at a high position flows into the membrane element 1 in the MBR tank 2 by utilizing the action of gravitational potential energy, the membrane element 1 is reversely injected, soaked and cleaned, the third pipeline 12 is provided with the automatic cleaning regulating valve 6, and the automatic cleaning regulating valve 6 controls the backwash water quantity through regulating the opening.

In the description of the present utility model, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium; may be a communication between two elements or an interaction between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature is "on" or "under" a second feature, which may be in direct contact with the first and second features, or in indirect contact with the first and second features via an intervening medium. Moreover, a first feature "above," "over" and "on" a second feature may be a first feature directly above or obliquely above the second feature, or simply indicate that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is level lower than the second feature.

In the description of the present specification, the terms "one embodiment," "some embodiments," "examples," "particular examples," or "some examples," etc., refer to particular features, structures, materials, or characteristics described in connection with the embodiment or example as being included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that alterations, modifications, substitutions and variations may be made in the above embodiments by those skilled in the art within the scope of the utility model.

Claims

1. An MBR backwashing system is characterized by comprising an MBR tank (2), a water producing pump (4) and a high-level water tank (5), wherein the MBR tank (2) is positioned below the high-level water tank (5); be equipped with the membrane module in MBR pond (2), produce water pump (4) water inlet end and the membrane module intercommunication in MBR pond (2), produce water pump (4) water outlet end and high-order water tank (5) water inlet end intercommunication, high-order water tank (5) water outlet end and the membrane module intercommunication in MBR pond (2).

2. An MBR backwash system according to claim 1, characterized in that the head tank (5) and the MBR tank (2) have a water head of between 7-8 meters.

3. The MBR backwash system according to claim 1, wherein the MBR pool membrane assembly comprises a membrane tank (15), a water collecting pipe (16), a membrane element (1), a membrane frame (17), a first water pipe (18) and a second water pipe (19), wherein a plurality of membrane elements (1) are installed in the membrane tank (15) through a plurality of membrane frames (17); the upper end of each membrane frame (17) is provided with a first water pipe (18), the first water pipe (18) is communicated with a water collecting pipe (16), and a second water pipe (19) is arranged on the water collecting pipe (16).

4. A MBR backwash system according to claim 3, characterized in that the water inlet end of the water producing pump (4) is in communication with a second water pipe (19) in the membrane module in the MBR tank (2).

5. The MBR backwashing system of claim 1, wherein a first pipeline (10) and a second pipeline (11) are connected between the water inlet end of the water producing pump (4) and the MBR tank (2), a first pipeline (10) and a third pipeline (12) are connected between the MBR tank (2) and the high-level water tank (5), and the first pipeline (10), the second pipeline (11) and the third pipeline (12) are connected through a three-way valve (9).

6. An MBR backwash system according to claim 5, wherein a pre-pump water producing valve (8) is provided on the second conduit (11).

7. An MBR backwash system according to claim 5, characterized in that the third pipeline (12) is provided with an automatic cleaning adjustment valve (6).

8. An MBR backwash system according to claim 1, characterized in that a fourth pipeline (13) is connected between the water producing pump (4) and the head tank (5), and a post-pump water producing valve (7) is arranged on the fourth pipeline (13).