Column type ceramic membrane gas washing system

Abstract

A column type ceramic membrane gas washing system is characterized in that a screw air compressor, a gas storage tank, a buffer tank, a column type ceramic membrane, a multi-stage centrifugal pump and a PLC are fixedly arranged at the upper end of a system support, the gas supply end of the screw air compressor is communicated with the gas inlet end of the gas storage tank through a gas supply pipeline, and the gas outlet end of the gas storage tank is communicated with the gas inlet end of the upper portion of the buffer tank through a gas inlet pipeline; the multi-stage centrifugal pump is communicated with a water inlet end at the lower part of the buffer tank through a water inlet pipeline, the water inlet pipeline is provided with a water inlet valve, the buffer tank is communicated with the lower end of the column type ceramic membrane through a backwashing pipeline, and an exhaust end at the upper part of the buffer tank is communicated with a water inlet at the lower end of the column type ceramic membrane through an exhaust pipeline; the air inlet valve, the water inlet valve, the backwashing pneumatic valve and the exhaust valve are driven by a PLC (Programmable Logic Controller); according to the system disclosed by the utility model, simple, convenient and efficient gas-water washing is carried out on the column-type ceramic membrane, and dirt in the column-type membrane structure is effectively cleaned and emptied; the system is integrally arranged on the support and is driven by the screw air compressor and the PLC to operate, and energy and space are saved.

Description

Technical Field

[0001] The utility model relates to the technical field of ceramic membranes, in particular to a columnar ceramic membrane air-water washing system. Background Art

[0002] In the prior art, membrane fouling is likely to occur during the cleaning of columnar ceramic membranes. Particles, colloidal particles or solute macromolecules in the material adsorb and deposit on the membrane surface or in the membrane pores, resulting in a decrease in the membrane pore size or blockage, causing irreversible changes in the permeation flux and separation characteristics of the membrane.

[0003] During the production process, due to the influence of membrane fouling, the separation performance and permeation flux of the ceramic membrane decrease, and the concentration polarization increases, which will significantly increase the pressure difference on both sides of the ceramic membrane; in the current cleaning methods, it is difficult to simply and conveniently clean the membrane module in a short time and recycle it. Summary of the Invention

[0004] The purpose of the utility model is to provide a columnar ceramic membrane air-water washing system for efficiently air-water washing the columnar ceramic membrane.

[0005] In order to achieve the above purpose, the technical solution of the utility model is as follows:

[0006] A columnar ceramic membrane air-water washing system, characterized in that it includes a system support. A screw air compressor, an air storage tank, a buffer tank, a columnar ceramic membrane, a multistage centrifugal pump and a PLC controller are fixedly arranged at the upper end of the system support. The air supply end of the screw air compressor is communicated with the air inlet end of the air storage tank through an air supply pipeline. The air outlet end of the air storage tank is communicated with the air inlet end of the upper part of the buffer tank through an air inlet pipeline. An air inlet valve is arranged on the air inlet pipeline. The multistage centrifugal pump is communicated with the water inlet end of the lower part of the buffer tank through a water inlet pipeline. A water inlet valve is arranged on the water inlet pipeline. The buffer tank is communicated with the upper part of the columnar ceramic membrane through a backwashing pipeline. A backwashing pneumatic valve is arranged on the backwashing pipeline. The exhaust end of the upper part of the buffer tank is communicated with the water inlet of the lower end of the columnar ceramic membrane through an exhaust pipeline. An exhaust valve is arranged on the exhaust pipeline. The air inlet valve, the water inlet valve, the backwashing pneumatic valve and the exhaust valve are driven by the PLC controller. The buffer tank is provided with a liquid level gauge and a pressure gauge, and the liquid level gauge and the pressure gauge are communicatively connected with the PLC controller.

[0007] Furthermore, a vent hole is arranged on the side wall of the buffer tank, and a vent valve is arranged on the vent hole. The vent valve is driven by the PLC controller.

[0008] Furthermore, the ceramic membrane air-water washing system includes a medicine box, which is fixedly arranged at the upper end of the system support. The medicine box is communicated with the buffer tank and the columnar ceramic membrane through a medicine adding pipeline.

[0009] The system of the utility model conducts simple, convenient and efficient air-water washing on the columnar ceramic membrane, effectively cleaning and emptying the dirt in the columnar membrane structure; the system is integrally arranged on the bracket and driven by a screw air compressor and a PLC, which is energy-saving and space-saving. Description of the Drawings

[0010] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0011] Figure 2 It is another three-dimensional structural schematic diagram of the utility model;

[0012] Figure 3 It is a top view structural schematic diagram of the utility model.

[0013] Reference Signs:

[0014] 1 System Bracket, 2 Screw Air Compressor, 3 PLC Controller, 4 Buffer Tank, 5 Medicine Tank,

[0015] 6 Centrifugal Pump, 7 Water Inlet Pipeline, 8 Air Inlet Pipeline, 9 Backwashing Pipeline, 10 Exhaust Pipeline, 11 Chemical Feeding Pipeline,

[0016] 12 Water Inlet Valve, 13 Air Inlet Valve, 14 Backwashing Pneumatic Valve, 15 Exhaust Valve, 16 Columnar Ceramic Membrane,

[0017] 17 Pipeline System, 18 Bypass Valve. Detailed Embodiment

[0018] Next, the technical solutions of the utility model will be clearly and completely described in conjunction with the drawings. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the utility model.

[0019] The utility model discloses a columnar ceramic membrane air-water washing system, as Figure 1 shown, which includes a system bracket 1. The upper end of the system bracket 1 is fixedly provided with a screw air compressor 2, an air storage tank, a buffer tank 4, a columnar ceramic membrane 16, a multistage centrifugal pump 6 and a PLC controller 3. The air supply end of the screw air compressor 2 is communicated with the air inlet end of the air storage tank through an air supply pipeline. The air supply pressure of the screw air compressor 2 is 0.8 MPa. The air outlet end of the air storage tank is communicated with the air inlet end of the upper part of the buffer tank 4 through an air inlet pipeline 8, and the air inlet pipeline 8 is provided with an air inlet valve 13.

[0020] As Figure 3As shown, the multistage centrifugal pump 6 is connected to the water inlet end at the lower part of the buffer tank 4 through the water inlet pipeline 7. The water inlet pipeline 7 is provided with a water inlet valve 12. The buffer tank 4 is connected to the upper part of the columnar ceramic membrane 16 through the backwashing pipeline 9. The backwashing pipeline 9 is provided with a backwashing pneumatic valve 14. The exhaust end at the upper part of the buffer tank 4 is connected to the water inlet at the lower end of the columnar ceramic membrane 16 through the exhaust pipeline 10. The exhaust pipeline 10 is provided with an exhaust valve 15. The intake valve 13, the water inlet valve 12, the backwashing pneumatic valve 14 and the exhaust valve 15 are driven by the PLC controller 3.

[0021] Among them, as Figure 2 shown, the water inlet pipeline 7 and the backwashing pipeline 9 share a section of pipeline at the lower end of the buffer tank 4. The functions of the pipeline are controlled by driving the water inlet valve 12 and the backwashing pneumatic valve 14 by the PLC controller 3.

[0022] The buffer tank 4 is provided with a liquid level gauge and a pressure gauge. The liquid level gauge and the pressure gauge are communicatively connected to the PLC controller 3. Through the signals collected by the process liquid level gauge and the pressure gauge, the air pressure and the height of the liquid level gauge are obtained by the feedback of the PLC controller 3 program. Through the coordinated control of the PLC controller 3, the functions of timed backwashing, constant-pressure differential backwashing and constant-flow backwashing are completed.

[0023] The side wall of the buffer tank 4 is provided with an air vent hole. The air vent hole is provided with a vent valve. The vent valve is driven by the PLC controller 3. The air vent hole is used for exhausting air after a single working process of the buffer tank 4 is completed.

[0024] The ceramic membrane air-water washing system includes a medicine box 5. The medicine box 5 is fixed at the upper end of the system support 1. The medicine box 5 is connected to the buffer tank 4 and the columnar ceramic membrane 16 through a medicine adding pipeline 11.

[0025] The air-water washing method using the air-water washing system of a columnar ceramic membrane of the present utility model includes the following steps:

[0026] Step S1: The vent valve is closed, the water inlet valve 12 is opened, the multistage centrifugal pump 6 sends water into the buffer tank 4. When the liquid level of the buffer tank 4 reaches a height of one meter, the water inlet valve 12 is closed, and the bypass valve 18 of the pipeline system 17 is opened, and the system produces water normally;

[0027] Step S2: The backwashing pneumatic valve 14 is opened, the internal air pressure of the buffer tank 4 is 0.5 MPa, forming a large pressure difference with the outside. The buffer tank 4 releases gas to push water into the columnar ceramic membrane 16 for water backwashing, and the backwashing lasts for ten seconds;

[0028] Step S3: After the buffer tank 4 releases a certain amount of gas, the internal air pressure of the buffer tank 4 drops to 0.3 MPa. The remaining gas leads from the exhaust pipeline 10 at the upper end of the buffer tank 4 to the water inlet at the lower end of the columnar ceramic membrane 16 for aeration air washing to push out and drain the dirt in the columnar ceramic membrane 16;

[0029] Step S4: After the residual gas washing is completed, the air release valve is opened, and it returns to Step S1, repeating the above operations.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A columnar ceramic membrane gas-water washing system, characterized in that: The invention comprises a system support (1), wherein a screw air compressor (2), an air storage tank, a buffer tank (4), a columnar ceramic membrane (16), a multistage centrifugal pump (6) and a PLC controller (3) are fixedly arranged at the upper end of the system support (1), wherein the air supply end of the screw air compressor (2) is connected to the air inlet end of the air storage tank via an air supply pipeline, the air outlet end of the air storage tank is connected to the air inlet end of the upper part of the buffer tank (4) via an air inlet pipeline (8), the air inlet pipeline (8) is provided with an air inlet valve (13), and the multistage centrifugal pump (6) is connected to the water inlet end of the lower part of the buffer tank (4) via a water inlet pipeline (7), the water inlet pipeline (7) is provided with a water inlet valve (13). 2), the buffer tank (4) is connected to the upper part of the columnar ceramic membrane (16) through a backwash pipeline (9), the backwash pipeline (9) is provided with a backwash pneumatic valve (14), the exhaust end of the upper part of the buffer tank (4) is connected to the water inlet at the lower end of the columnar ceramic membrane (16) through an exhaust pipeline (10), the exhaust pipeline (10) is provided with an exhaust valve (15), the air inlet valve (13), the water inlet valve (12), the backwash pneumatic valve (14) and the exhaust valve (15) are driven by a PLC controller (3), the buffer tank (4) is provided with a liquid level meter and a pressure gauge, and the liquid level meter and the pressure gauge are communicatively connected to the PLC controller (3).

2. The columnar ceramic membrane gas-water washing system according to claim 1 is characterized in that: The side wall of the buffer tank (4) is provided with an air leakage hole, and the air leakage hole is provided with an air leakage valve, and the air leakage valve is driven by a PLC controller (3).

3. The columnar ceramic membrane gas-water washing system according to claim 1, characterized in that: The ceramic membrane gas-water washing system comprises a medicine box (5), wherein the medicine box (5) is fixed to the upper end of the system bracket (1), and the medicine box (5) is connected to the buffer tank (4) and the columnar ceramic membrane (16) via a medicine adding pipeline (11).

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