Membrane device with fluid self-controlled oscillating jet flushing function

Abstract

The invention relates to a filter membrane device. A filter membrane device with fluid self-controlled oscillating jet flushing function of the present invention comprises two water inlet pipelines, which are respectively connected to pumps, wherein it also includes a jet oscillator and a membrane filter device, the two There is a pressure difference in the water inlet pipeline, wherein the high-pressure pipe is connected to the jet oscillator, the low-pressure pipe is connected to the membrane filter device installed with the filter membrane assembly, and the jet oscillator is connected to the membrane filter device. The invention adopts a jet oscillator to control the oscillating jet flushing in fluid filtration, the frequency is fixed and controllable, no solid movable elements are used to participate in the filter membrane flushing, no wear and tear, and not easy to be damaged.

Description

technical field [0001] The invention relates to a filter membrane device, in particular to a filter membrane device with the function of fluid self-controlled oscillating jet flushing. Background technique [0002] With the development of science and technology, the new term "membrane" has appeared more and more in scientific research, production and scientific literature. There are many types of membranes and a wide range of applications, which can be widely used in reverse osmosis, nanofiltration, ultrafiltration Filtration, microfiltration, gas separation, dialysis, pervaporation, electrodialysis, membrane electrolysis, batteries, catalysts, immobilized enzymes and other fields, especially for sewage treatment, drinking water purification, hemodialysis, seawater desalination, etc. The research on membrane separation mechanism and membrane process development has aroused great attention of people engaged in membrane science and technology research at home and abroad. At p...

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Problems solved by technology

[0003] Existing methods for removing membrane fouling mainly include: 1. Manual removal, that is, using hydrochloric acid, nitric acid to decompose sludge, or traditional physical and chemical methods such as manual removal of sludge. This method has low efficiency and removes sludge. Sometimes, it is often necessary to stop the operation of sewage purification equipment, resulting in waste of resources; 2. The method of adding cleaning agent to the high-pressure pump to remove sludge and dirt, this method also needs to stop the operation of sewage purification equipment, consumes energy and increases costs; 3. Cross flow, that is, the flow direction of the cleaning agent is in the shape of a cross (right angle) with the direction of the filtrate, which is different from the traditional cleaning agent and the filtrate flowing in the same direction. In this method, the sediment is continuously the lateral flow of the cleaning agent. Running and swimming around, so it is not easy to cover the membrane surface, so it will not affect the passage of filtrate, but when the sludge scale accumulates to a relatively large sludge mass, the efficiency of this method will be greatly reduced , This method needs to stop the operation of the purification equipment by adding cleaning agent; 4. Pulse method, connect the filter membrane device to a piston pulse device, and remove the dirt on the membrane surface through the mechanical movement of the piston. This method consumes more Electric energy, low efficiency, and the complex valve air-closing system is easily damaged; 5. The patent application WO2008 / 153818A1 proposes a new filter membrane fouling treatment method, which removes the dirt on the filter membrane surface by adding random air flotation in the filter membrane filtration , the air pressure of this method is unstable, and the gas density is small, the momentum flux is low, the scouring force on the deposited dirt is too small, and the sludge on the surface of the filter membrane cannot be removed

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