CN111675312A - A pilot-scale experimental device for a column MBR system - Google Patents

Abstract

The invention discloses a pilot-scale experimental device for a column MBR system, which is used for testing the filtration performance of an MBR membrane. The invention sets up a return pipe connecting the production water tank and the original water tank, and the purified water in the water production tank can return to the original water tank, and then enter the membrane tank water tank through the original water tank, so that the raw water in the membrane tank water tank can keep the concentration unchanged, so as to simulate the MBR membrane. the actual filtering situation. In addition to cleaning the MBR membrane, the aeration module can also fully stir the sediment in the raw water, giving the MBR membrane a stable test environment.

Description

A pilot-scale experimental device for a column MBR system

technical field

The invention relates to the field of water treatment, in particular to a pilot-scale experimental device of a column-type MBR system.

Background technique

Membrane Bio-Reactor (MBR for short) is a water treatment technology that combines a membrane separation unit with a biological treatment unit. At present, this water treatment technology is being used more and more widely.

However, some MBR membrane products produced with new formulas have not undergone detailed parameter testing before leaving the factory. In the process of putting into use in the later project, due to insufficient data collection in the early stage, the adaptability of membrane products to different water quality is quite different. , and it is easy to cause the attenuation of the component flux, which will affect the subsequent operation and operation, resulting in the problem of substandard water quality.

The current testing device needs to build a large area of test equipment in the place where the sewage is generated, and conduct tests for specific sewage. The construction and operation costs remain high, which is not conducive to popularization and has many shortcomings.

Therefore, there is currently a need for a pilot-scale experimental device for a column-type MBR system that can overcome the above-mentioned problems.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a pilot-scale experimental device for a column MBR system that can be tested with a small amount of sewage and is convenient.

In order to achieve the above object, the technical scheme adopted in the present invention is: a pilot-scale experimental device of a column MBR system for testing the filtration performance of the MBR membrane, which includes a membrane tank water tank, a raw water tank, a water production tank, a backwash component, a sewage A mud return pump and an aeration assembly, the membrane tank water tank is provided with a filter membrane assembly, and the membrane tank water tank has a raw water inlet connected to the raw water tank, a produced water outlet connected to the water production tank, and a water outlet connected to the aeration tank. The aeration port of the air component and the sludge return port connected to the sludge return pump, a self-priming pump is arranged between the water production outlet and the water production tank, and the water production tank is provided with a return pipe connected to the original water tank, The produced water outlet is provided with a detection component for detecting pressure and flow.

Preferably, the experimental device further includes an alarm device connected to the detection component, and the alarm device sends out a prompt message when the detected pressure and flow of the detection component reach or exceed a set value.

Preferably, the experimental device further includes a bracket, the membrane tank water tank, the water production tank, the backwash component and the aeration component are all arranged on the bracket, and the raw water tank is detachably arranged on the the side of the bracket.

Further preferably, the water production tank is arranged on the upper part of the bracket.

Preferably, the connection modes of the membrane tank water tank, the production water tank, the backwashing component and the aeration component and the pipeline are all detachable connections.

Preferably, the filter membrane assembly includes a pipe frame fixedly connected to the water production tank and an MBR membrane frame detachably connected to the pipe frame, and the MBR membrane is fixed on the MBR membrane frame.

Further preferably, the side wall of the water production tank is provided with a sliding track, and the MBR film frame is slidably arranged on the sliding track.

Preferably, the backwashing assembly includes a backwashing pump and a dosing device, and the inlet and the outlet of the backwashing pump are respectively connected to the produced water tank and the produced water outlet.

Due to the application of the above-mentioned technical solutions, the present invention has the following advantages compared with the prior art:

Since the present invention is provided with a return pipeline connecting the production water tank and the original water tank, the purified water in the produced water tank can return to the original water tank, and then enter the membrane tank water tank through the original water tank, so that the raw water in the membrane tank water tank can keep the concentration unchanged, so as to simulate Actual filtration of MBR membranes. In addition to cleaning the MBR membrane, the aeration component can fully stir the sediment in the raw water, giving the MBR membrane a stable test environment. Therefore, the experimental device of the present invention can perform a long-term test on the performance of the MBR membrane without a large amount of raw water, and only need to transport a small amount of raw water to the test site to complete the long-term MBR membrane test, without the need to go to the raw water site to build the cost. Expensive test setup.

The experimental device of the present invention is supported by a bracket, has a small structure, and can also be transported to a raw water site as required to test the performance of the MBR membrane.

The pipe frame and the MBR film frame of the experimental device of the invention can be detachably connected, which can be used to test different MBR films on the premise of ensuring the sealing performance, and the replacement of the MBR film is simpler and more efficient than the traditional experimental device.

Description of drawings

1 is a schematic diagram of the principle of the present invention.

In the above drawings: 1. Membrane tank water tank; 11. Raw water inlet; 12. Produced water outlet; 13. Aeration port; 14. Sludge return port; 2. Raw water tank; 3. Production water tank; 4. Aeration assembly ;5, sludge return pump; 6, self-priming pump; 7, return pipeline; 81, backwash pump; 82, acid dosing barrel; 83, acid metering pump; 84, alkali dosing barrel; 85, alkali metering pump .

Detailed ways

The present invention will be further described below in conjunction with the embodiments shown in the accompanying drawings:

Referring to Figure 1, a pilot-scale experimental device for a column MBR system is used to test the filtration performance of MBR membranes, which includes a membrane tank water tank 1, a raw water tank 2, a production water tank 3, a backwash component and an aeration component 4 The membrane tank 1 is provided with a membrane filter assembly (not shown in the figure). The air port 13 and the sludge return port 14 connected to the sludge return pump 5, the self-priming pump 6 is arranged between the produced water outlet 12 and the water production tank 3, and the water production tank 3 is provided with a return pipe 7 connected to the original water tank 2, The water outlet 12 is provided with a detection component (not shown in the figure) for detecting pressure and flow.

The backwash assembly includes a backwash pump 81, an acid dosing barrel 82, an acid metering pump 83, an alkali dosing barrel 84 and an alkali metering pump 85. The inlet and outlet of the backwash pump 81 are respectively connected to the water production tank 3 and the water production outlet 12, The backwash module backwashes the membrane module according to the settings to simulate the backwash steps in actual use.

When the present embodiment works, the MBR membrane to be tested is installed in the membrane tank water tank 1, the corresponding raw water is added to the original water tank 2, the raw water flows into the membrane tank water tank 1 from the original water tank 2, and the self-priming pump 6 and the aeration assembly 4 are activated, The self-priming pump 6 provides negative pressure for the outlet 12 of the produced water. The raw water in the membrane tank 1 passes through the filter membrane module and the purified water passes through the self-priming pump 6 and then enters the water production tank 3. The aeration module 4 is placed in the membrane tank 1. Gas is introduced into the bottom, and the vibration generated by the gas floating is used to clean the filter membrane module. The purified water in the water production tank 3 re-enters the raw water tank 2 through the return pipe 7, and then enters the membrane tank water tank 1, so that the concentration of the raw water in the membrane tank water tank is increased. Remaining unchanged, if the concentration of raw water in the membrane tank 1 changes too much, the sludge return pump 5 can be used to extract part of the sludge in the membrane tank 1 to maintain the concentration. When the detection module detects that the operating negative pressure of the permeate outlet 12 is greater than or equal to 0.04Mpa, or the permeate flux decay rate exceeds 20%, it means that the MBR membrane is fouled and the influent water quality is not suitable for the stable operation of the membrane module. The detection value of the embodiment is determined according to the type of the MBR membrane and the quality of the raw water. In other embodiments, it can be adjusted as needed.

Since the present embodiment is provided with a return pipeline 7 connecting the produced water tank 3 and the raw water tank 2, the purified water in the produced water tank 3 can return to the raw water tank 2, and then enter the membrane tank water tank 1 through the raw water tank 2, so that the water in the membrane tank water tank 1 The raw water can keep the concentration constant to simulate the actual filtration of the MBR membrane. In addition to cleaning the MBR membrane, the aeration module 4 can also fully stir the sediment in the raw water to give the MBR membrane a stable test environment. Therefore, the experimental device of this embodiment can test the performance of the MBR membrane for a long time without a large amount of raw water. It only needs to transport a small amount of raw water to the test site to complete the long-term MBR membrane test, and there is no need to construct the raw water site. The expensive test device can greatly reduce the cost of MBR film testing.

In order to facilitate the operation, the experimental device also includes an alarm device connected to the detection component. When the detected pressure and flow of the detection component reach or exceed the set value, the alarm device will issue a prompt message. The alarm device can use appropriate equipment as required, and in this embodiment, a PLC circuit is used as the alarm device.

The experimental device also includes a bracket (not shown in the figure), the membrane tank water tank 1, the production water tank 3, the backwash component and the aeration component 4 are all arranged on the bracket, and the raw water tank 2 is detachably arranged on the side of the bracket. Moreover, the water production tank 3 is arranged on the upper part of the bracket, the water flow in the water production tank 3 can enter the raw water tank 2 by gravity, and the water flow speed into the raw water tank 2 can be adjusted according to the water production speed to ensure that the membrane tank 1 is in the water tank 1. raw water concentration. The experimental device of this embodiment is supported by a bracket, and the overall structure is small to facilitate transportation. When necessary, it can be transported to the original water site to test the performance of the MBR membrane.

In this embodiment, the membrane tank water tank 1, the water production tank 3, the backwash component and the aeration component 4 are all connected in a detachable manner to the pipeline. Since the device in this embodiment is an experimental device, it is prone to failure, and the detachable connection mode can facilitate replacement and maintenance.

In this embodiment, the filter membrane assembly includes a pipe frame fixedly connected to the water production tank 3 and an MBR membrane frame detachably connected to the pipe frame. The MBR membrane frame is fixedly provided with an MBR membrane, because it is only necessary to fix the MBR membrane in advance. On different MBR membrane holders, it is convenient to test different MBR membranes.

The pipe frame and the MBR film frame of the experimental device of the present invention are detachably connected, which can be used to test different MBR films on the premise of ensuring the sealing performance, and the side wall of the water production tank 3 is provided with a sliding track, and the MBR film frame is slidably arranged on the On the sliding track, it is convenient to install the MBR film frame.

The above-mentioned embodiments are only intended to illustrate the technical concept and characteristics of the present invention, and the purpose thereof is to enable those who are familiar with the art to understand the content of the present invention and implement them accordingly, and cannot limit the protection scope of the present invention. All equivalent changes or modifications made according to the spirit of the present invention should be included within the protection scope of the present invention.

Claims (8)

1. The utility model provides a pilot scale experimental apparatus of column type MBR system for the filtering quality of test MBR membrane, it includes membrane cisterna water tank, former water tank, produces the water tank, backwash subassembly, mud backwash pump and aeration subassembly, be provided with the filter membrane subassembly in the membrane cisterna water tank, have on the membrane cisterna water tank and connect the raw water entry of former water tank, connect produce the water outlet of water tank, connect the aeration mouth of aeration subassembly and the mud backward flow mouth of connecting mud backwash pump, produce the water outlet with produce and be provided with self priming pump, its characterized in that between the water tank: the water production tank is provided with a return pipeline connected with the original water tank, and the water production outlet is provided with a detection assembly for detecting pressure and flow.

2. The pilot plant experimental facility of the column MBR system of claim 1, wherein: the experimental device also comprises an alarm device connected with the detection assembly, and the alarm device sends prompt information when the detected pressure and flow of the detection assembly reach or exceed set values.

3. The pilot plant experimental facility of the column MBR system of claim 1, wherein: the experimental device further comprises a support, the membrane pool water tank, the water production tank, the backwashing component and the aeration component are all arranged on the support, and the raw water tank is detachably arranged on the side portion of the support.

4. The pilot plant experimental facility of the column MBR system of claim 3, wherein: the water production tank is arranged at the upper part of the bracket.

5. The pilot plant experimental facility of the column MBR system of claim 1, wherein: the membrane tank, the water production tank, the backwashing component and the aeration component are detachably connected with the pipeline.

6. The pilot plant experimental facility of the column MBR system of claim 1, wherein: the filter membrane component comprises a pipeline frame fixedly connected with the water production tank and an MBR membrane frame detachably connected with the pipeline frame, and the MBR membrane frame is fixedly provided with the MBR membrane.

7. The pilot plant experimental facility of the column MBR system of claim 6, wherein: the side wall of the water production tank is provided with a sliding rail, and the MBR membrane frame is arranged on the sliding rail in a sliding manner.

8. The pilot plant experimental facility of the column MBR system of claim 1, wherein: the backwashing component comprises a backwashing pump and a dosing device, and an inlet and an outlet of the backwashing pump are respectively connected with the water production tank and the water production outlet.

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