Ultrafiltration device for preventing filter membrane surface from scaling

Abstract

The invention relates to an ultrafiltration device for preventing a filter membrane surface from scaling. The device comprises at least two filter element seats and connecting pipelines thereof, wherein an ultrafiltration filter element and a multi-stage filter element are arranged in the filter element seats, the multi-stage filter element is arranged in front of the ultrafiltration filter element and comprises a scale inhibition filter element; the scale inhibition filter element consists of compound phosphate and non-woven fabric, and the non-woven fabric covers the compound phosphate. According to the ultrafiltration device, the front end of the ultrafiltration filter element is connected with the scale inhibition filter element, so that metal ions are dispersed in water after water passes through the scale inhibition filter element, the metal ions are prevented from forming crystal with dissolved oxygen in the water, and filter holes of the ultrafiltration filter element are prevented from being blocked by growth and agglomeration of the crystal. The device is reasonable in design, accords with market requirement, and is suitable for popularization.

Description

technical field [0001] The invention relates to the field of filtration devices, in particular to an ultrafiltration device for preventing fouling on the surface of a filter membrane. Background technique [0002] With the improvement of people's living standards, people's requirements for water are getting higher and higher. The water quality in many parts of our country contains a large amount of calcium chloride and magnesium carbonate and other substances. The water quality in different regions forms water with different hardness, whether it is drinking water It is still industrial water. Hard water containing a large amount of calcium chloride and magnesium carbonate will cause certain damage to equipment or human body. Hard water will corrode some metal equipment to form red water, black water, or form scaling on the inner surface of equipment to cause equipment damage. There are many antiscalants on the market, which make the calcium, magnesium, iron and other metal i...

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Problems solved by technology

[0002] With the improvement of people's living standards, people's requirements for water are getting higher and higher. The water quality in many parts of our country contains a large amount of calcium chloride and magnesium carbonate and other substances. The water quality in different regions forms water with different hardness, whether it is drinking water It is still industrial water. Hard water containing a large amount of calcium chloride and magnesium carbonate will cause certain damage to equipment or human body. Hard water will corrode some metal equipment to form red water, black water, or form scaling on the inner surface of equipment to cause equipment damage. There are many antiscalants on the market, which make the calcium, magnesium, iron and other metal ions contained in the water react with the antiscalants to form soluble complexes, inhibit the formation of calcium carbonate and magnesium carbonate, and disperse into the water to interact with iron ions After the reaction, a dynamic protective film is formed on the inner wall of the pipe to achieve anti-corrosion and anti-scaling. The application of water purification and filtration equipment in the field of drinking water or industrial fields is more and more extensive. During the use of the filtration equipment, the surface of the filter membrane will condense a lot. A polymer blocks the pore size of the filter membrane, reduces its working efficiency and shortens its working life

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