Shell type membrane pollution maintenance cleaning system

Abstract

The utility model discloses a shell type membrane pollution maintenance cleaning system which comprises a backwashing pump, the backwashing pump is connected with a backwashing pneumatic valve, a dosing pump is connected in front of the backwashing pneumatic valve, the backwashing pneumatic valve is connected with an upper drainage pneumatic valve and a lower drainage pneumatic valve, and the upper drainage pneumatic valve is connected with a water pump. The upper drainage pneumatic valve and the lower drainage pneumatic valve are respectively connected with a water inlet end and a concentrated water end on one side of the membrane component, the water inlet end on one side of the membrane component is connected with an air inlet stirring electromagnetic valve, one side of the air inlet stirring electromagnetic valve is connected with an air source, the upper drainage pneumatic valve is connected with an upper water outlet end, and the lower drainage pneumatic valve is connected with a lower water outlet end. And the lower drainage pneumatic valve is connected with a lower water outlet end. According to the shell type membrane pollution maintainability cleaning system, under the condition that maintainability cleaning is carried out through liquid medicine, physical gas scrubbing can be carried out on the surfaces of membrane filaments through pulse type gas stirring, the liquid medicine concentration on the surfaces of the membrane filaments is better mixed, the better maintainability cleaning effect is improved, and the soaking time is shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of membrane pollution cleaning, in particular to a shell-type membrane pollution maintenance cleaning system. Background Art

[0002] There are four ways to clean the shell-type membrane system during operation: the first is chemical cleaning, which is generally carried out once every one to three months. It is a high-concentration and high-intensity chemical cleaning, usually lasting 2-6 hours or longer, accompanied by circulation and soaking; the second is hydraulic cleaning, which is a physical cleaning with a shorter time, generally performed every 30-60 minutes according to actual conditions; the third is air washing, which is also a physical cleaning. Usually, the pollutants on the surface of the membrane wire are washed away by air brushing before hydraulic cleaning, and then washed with water. The fourth is maintenance dosing cleaning, which is generally 1-7 days by adding chemical agents to the backwash water and then entering the membrane component, and then soaking for a period of time before discharging. Membrane pollution is divided into physical pollution and biological and chemical pollution. Physical pollution can generally be removed by hydraulic backwashing or air washing, while biological and chemical pollution can only be removed by chemical agents.

[0003] However, membrane pollution is generally caused by the coexistence of physical pollution and biochemical pollution. The existing shell-type membrane pollution maintenance cleaning system often only uses liquid medicine for chemical cleaning. If the soaking time is too long, the effect is not obvious if it is too short. If the time is too long, it will occupy the effective filtration time and reduce the absolute water production of the system. Utility Model Content

[0004] The purpose of the utility model is to provide a shell-type membrane pollution maintenance cleaning system, which can also perform physical air scrubbing on the membrane fiber surface through pulsed air stirring when performing maintenance cleaning with liquid medicine, and make the concentration of liquid medicine on the membrane fiber surface better mixed, thereby improving the maintenance cleaning effect, shortening the immersion time, and solving the problems raised by the above-mentioned technical background.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a shell-type membrane pollution maintenance cleaning system, comprising: a backwash pump, the backwash pump is connected to a backwash pneumatic valve, and a dosing pump is connected in front of the backwash pneumatic valve, the backwash pneumatic valve is connected to an upper drainage pneumatic valve and a lower drainage pneumatic valve, the upper drainage pneumatic valve and the lower drainage pneumatic valve are respectively connected to the water inlet end and the concentrated water end of one side of the membrane assembly, the water inlet end of one side of the membrane assembly is connected to an air inlet stirring solenoid valve, and one side of the air inlet stirring solenoid valve is connected to an air source;

[0006] The backwash pump is used to transport the drug solution through the backwash pneumatic valve into the pipeline. The backwash pneumatic valve is used to connect the backwash pump, the dosing pump and the pipeline. The dosing pump is used to add acid, alkali and sodium hypochlorite into the drug solution. The upper drainage pneumatic valve and the lower drainage pneumatic valve are used to discharge the water flow and control the connection of the membrane assembly. The air intake agitation solenoid valve is used to cooperate with the air source to complete the air stirring function and physically scrub the surface of the membrane wire. The air source is used to supply compressed gas.

[0007] Preferably, the upper water discharge pneumatic valve is connected to an upper concentrated water end, and the lower water discharge pneumatic valve is connected to a lower water inlet end; the upper concentrated water end and the lower water inlet end are used to discharge the cleaning water flow.

[0008] Preferably, the water inlet end on one side of the membrane assembly is connected to a water inlet pneumatic valve, and the water inlet pneumatic valve is connected to a water inlet pump; the water inlet pneumatic valve is used to control the connection between the water inlet pump and the membrane assembly, and the water inlet pump is used to transport the water flow to be filtered.

[0009] Preferably, the water production end of the membrane assembly is connected to a water production pneumatic valve, and the water production pneumatic valve is connected to an external water storage component; the water production pneumatic valve is used to discharge water into the external water storage component.

[0010] Preferably, a water production flow meter is installed at the water production end, and another concentrate flow indicator is installed on one side of the concentrate pneumatic valve; the concentrate flow indicator is used to indicate the size of the flow passing through.

[0011] Preferably, a pressure indicator is installed between the backwash pneumatic valve and the membrane assembly, and another two pressure indicators are installed between the water inlet end and the concentrated water end of the membrane assembly; the pressure indicator is used to indicate the pressure condition in the pipeline.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0013] 1. Pulse gas stirring is used to achieve physical cleaning of the membrane surface by air scrubbing while immersing, so that the contamination on the membrane surface can be restored through short-term enhanced air scrubbing.

[0014] 2. While the surface pollutants are washed away by air scrubbing, the concentration of the drug solution near the membrane fiber surface may be reduced due to the consumption of the contact with the pollutants on the membrane fiber surface. The pulsed air stirring mixes the drug solution at the same time, so that the concentration of the drug solution on the membrane fiber surface can be increased, thereby enhancing the effect of biological and chemical pollution recovery.

[0015] 3. At the same time, in this way, the soaking time can be shortened to a certain extent, so that the performance of the membrane system can be improved;

[0016] The shell-type membrane fouling maintenance cleaning system can, in the case of maintenance cleaning with liquid medicine, also physically scrub the membrane filament surface with pulsed gas stirring, and better mix the concentration of liquid medicine on the membrane filament surface, thereby improving the maintenance cleaning effect and shortening the immersion time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a system structure diagram of the utility model.

[0018] The reference numerals and names in the figures are as follows:

[0019] 1. Backwash pump; 2. Backwash pneumatic valve; 3. Dosing pump; 4. Upper drainage pneumatic valve; 5. Lower drainage pneumatic valve; 6. Membrane assembly; 7. Air inlet agitation solenoid valve; 8. Air source; 9. Water inlet pneumatic valve; 10. Water inlet pump; 11. Water production pneumatic valve; 12. Concentrated water flow indicator; 13. Pressure indicator; 14. Water production flow meter. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Embodiment 1

[0022] See also Figure 1 The utility model provides an embodiment: a shell-type membrane pollution maintenance cleaning system, comprising: a backwash pump 1, the backwash pump 1 is connected to a backwash pneumatic valve 2 through a pipeline, and a dosing pump 3 is connected to the backwash pneumatic valve 2 through a pipeline, the backwash pneumatic valve 2 is connected to an upper drainage pneumatic valve 4 and a lower drainage pneumatic valve 5 through a pipeline, the upper drainage pneumatic valve 4 and the lower drainage pneumatic valve 5 are respectively connected to the water inlet end and the concentrated water end of one side of the membrane assembly 6 through pipelines, the water inlet end of one side of the membrane assembly 6 is connected to an air inlet stirring solenoid valve 7 through a pipeline, and one side of the air inlet stirring solenoid valve 7 is connected to an air source 8 through a pipeline;

[0023] In specific use, when it is necessary to add medicine for backwashing, the backwashing pneumatic valve 2 and the upper drainage pneumatic valve 4 are opened, and then the backwashing pump 1 and the dosing pump 3 are turned on to pump the liquid into the membrane assembly 6;

[0024] After the liquid medicine is pumped into the membrane assembly 6, the backwash pump 1 and the dosing pump 3 are stopped, and the backwash pneumatic valve 2 is closed.

[0025] During the soaking stage, the air inlet stirring solenoid valve 7 is opened every 30-60 seconds, and the air stirring is performed for 30-60 seconds, then stopped for 30-60 seconds, and then opened again for air stirring. After repeating this 3-5 times, the pulse air stirring can be stopped;

[0026] When it is necessary to discharge the liquid medicine, open the backwash pneumatic valve 2 and the upper water discharge pneumatic valve 4, and start the backwash pump 1 to discharge the liquid medicine.

[0027] Embodiment 2

[0028] See also Figure 1 The utility model proposes a shell-type membrane pollution maintenance cleaning system. Compared with the first embodiment, this embodiment also includes:

[0029] The upper drainage pneumatic valve 4 is connected to the upper concentrated water end through a pipeline, and the lower drainage pneumatic valve 5 is connected to the lower water inlet end through a pipeline; when the water flow is cleaned, the upper drainage pneumatic valve 4 is opened to discharge the cleaning water flow from the upper concentrated water end.

[0030] The water inlet end on one side of the membrane assembly 6 is connected to a water inlet pneumatic valve 9 through a pipeline, and the water inlet pneumatic valve 9 is connected to a water inlet pump 10 through a pipeline; when water cleaning is required, the water inlet pneumatic valve 9 is opened, and the water inlet pump 10 transports water through the water inlet pneumatic valve 9 into the membrane assembly 6 to provide a cleaning function.

[0031] The water production end of the membrane assembly 6 is connected to a water production pneumatic valve 11 through a pipeline, and the water production pneumatic valve 11 is connected to an external water storage component through a pipeline; water is discharged through the water production pneumatic valve 11 to the external water storage component.

[0032] A water production flow meter 14 is embedded and connected at the water production end, and another concentrated water flow indicator 12 is embedded and connected to one side of the concentrated water pneumatic valve 4; the water production flow meter 14 indicates the flow rate passing through to monitor the flow of water production, and the concentrated water flow indicator 14 indicates the flow rate passing through to monitor the working condition of the system.

[0033] A pressure indicator 13 is embedded and connected between the backwash pneumatic valve 2 and the membrane assembly 6, and another two pressure indicators 13 are embedded and connected between the water inlet end and the concentrated water end of the membrane assembly 6; the pressure indicator 13 indicates the pressure in the pipeline to monitor the working status of the system.

[0034] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A shell-type membrane fouling maintenance cleaning system, characterized in that: include: A backwash pump (1), wherein the backwash pump (1) is connected to a backwash pneumatic valve (2), and a dosing pump (3) is connected in front of the backwash pneumatic valve (2), wherein the backwash pneumatic valve (2) is connected to an upper drainage pneumatic valve (4) and a lower drainage pneumatic valve (5), wherein the upper drainage pneumatic valve (4) and the lower drainage pneumatic valve (5) are respectively connected to a water inlet end and a concentrated water end on one side of a membrane assembly (6), wherein the water inlet end on one side of the membrane assembly (6) is connected to an air inlet agitation solenoid valve (7), and one side of the air inlet agitation solenoid valve (7) is connected to an air source (8).

2. A shell-type membrane fouling maintenance cleaning system according to claim 1, characterized in that: The upper water discharge pneumatic valve (4) is connected to an upper concentrated water end, and the lower water discharge pneumatic valve (5) is connected to a lower water inlet end.

3. A shell-type membrane fouling maintenance cleaning system according to claim 1, characterized in that: The water inlet end on one side of the membrane assembly (6) is connected to a water inlet pneumatic valve (9), and the water inlet pneumatic valve (9) is connected to a water inlet pump (10).

4. A shell-type membrane fouling maintenance cleaning system according to claim 1, characterized in that: The water production end of the membrane assembly (6) is connected to a water production pneumatic valve (11), and the water production pneumatic valve (11) is connected to an external water storage component.

5. A shell-type membrane fouling maintenance cleaning system according to claim 4, characterized in that: A water production flow meter (14) is installed at the water production end, and another concentrated water flow indicator (12) is installed on one side of the concentrated water pneumatic valve (4).

6. A shell-type membrane fouling maintenance cleaning system according to claim 1, characterized in that: A pressure indicator (13) is installed between the backwash pneumatic valve (2) and the membrane assembly (6), and another two pressure indicators (13) are installed between the water inlet end and the concentrated water end of the membrane assembly (6).

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