Membrane cleaning device and method in membrane separating technology and its application

A membrane cleaning and membrane separation technology, applied in the field of membrane separation, can solve the problems of unfavorable use of membranes, limited backwash frequency, poor backwash cleaning effect, etc., to optimize the backwash effect, strengthen the aeration effect, and the backwash effect. good effect

Active Publication Date: 2007-03-21
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

The two-position three-way valve does not have the function of quick opening and closing. After the air enters the cylinder, the air is pressed out by the movement of the piston. A pulse process takes at least a few seconds, and no obvious pulse effect can be formed.
[0010] (2) It is also difficult to achieve sufficient and uniform mixing in the frontal contact between compressed gas and water, especially the gas canno

Method used

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  • Membrane cleaning device and method in membrane separating technology and its application
  • Membrane cleaning device and method in membrane separating technology and its application

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Embodiment Construction

[0045] Figure 1 is a schematic diagram of the membrane cleaning device of the present invention, 1: membrane filter 2: backwash water inlet pipeline 3: pulse air pipeline 4: pulse valve 5: air compressor 6: air purifier.

[0046] A membrane cleaning device in membrane separation technology is realized in this way, including a membrane filter 1, a backwash water inlet pipeline 2 and a pulse air pipeline 3; the membrane filter 1 is connected to the backwash water inlet pipeline 2, and the pulse The air pipeline 3 is connected with the backwash water inlet pipeline 2, and periodically adds compressed air to the water flow in the backwash water inlet pipeline.

[0047] The membrane cleaning device also includes a pulse valve 4 and an air compressor 5 that can generate a pulsed oscillating air flow; the pulse valve 4 is directly connected to the pulse air pipeline 3 and then stretched into the backwash water inlet pipeline 2 Middle; The air compressor 5 is connected with the pulse ...

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Abstract

The membrane cleaning device includes one back washing water intake pipeline connected to the membrane filter, and one pulse air pipeline connected to the back washing water intake pipeline to adding compressed air into the water flow of the back washing water intake pipeline. The pulse air pipeline includes one pulse valve connected directly to the back washing water intake pipeline, one air compressor with air storing packet and connected to the pulse valve and one PLC control system to control the pulse valve. The device of the present invention can generate high strength pulse air-mixing water flow to clean membrane, especially hollow fiber membrane effectively. The present invention may be used widely in the water flooding treatment of hyposmosis oil field, pure water preparation, product purification, waste water treatment, etc.

Description

technical field [0001] The invention relates to a membrane separation technology, in particular to a membrane cleaning method and device in the membrane separation technology and its application in low-permeability oil field injection water quality treatment, pure water preparation, product purification and wastewater as reuse water treatment. Background technique [0002] Membrane material is a kind of porous medium. The membrane separation process is the process in which the solvent in the treated liquid passes through the membrane under pressure and the solute is trapped. [0003] One of the keys to the application of membrane separation technology is membrane cleaning and regeneration technology. Although microfiltration mainly has the function of sieving and intercepting, generally speaking, there is less adsorption in the pores. But concentration polarization and membrane fouling are almost inevitable. To maintain high membrane flux, proper cleaning techniques are cr...

Claims

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Application Information

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IPC IPC(8): B01D65/02
Inventor 李宏伟李怀印
Owner CHINA PETROLEUM & CHEM CORP
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