Special scale inhibitor for integrated membrane system

Abstract

The invention discloses a special scale inhibitor for an integrated membrane system in a waste water deep treatment process. The special scale inhibitor for the integrated membrane system comprises the components in parts by weight: 15-35 parts of tannic acid, 20-40 parts of polyaspartic acid, 5-20 parts of vinyl methyl ether / maleic anhydride copolymer, 2-10 parts of dodecyl dimethyl benzyl ammonium chloride and 20-31 parts of distilled water. The tannic acid and the polyaspartic acid are used as main agents; the formation of insoluble salts can be inhibited under the coordinated effect of the tannic acid and the polyaspartic acid; meanwhile, the tannic acid and the polyaspartic acid can chelate heavy metal ions in waste water and can be dispersed in the waste water to stop the depositions of the heavy metal ions on the surface of a membrane; the tannic acid and the polyaspartic acid are also compounded with the vinyl methyl ether / maleic anhydride copolymer and the dodecyl dimethyl benzyl ammonium chloride to further enhance the complexing property and chelating property of the scale inhibitor on the basis of inhibiting slime deposition and peeling off slime. As the used raw materials are all non-toxic and hazard free and are easily biodegraded, the special scale inhibitor for the integrated membrane system is an environment friendly water treatment agent.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a scale inhibitor specially used for integrated membrane systems in the advanced treatment of wastewater. Background technique [0002] In today's increasingly scarce water resources, especially the increasingly stringent environmental protection standards, the word zero discharge of wastewater has been constantly mentioned by people, and membrane technology, as a key technology for advanced wastewater treatment and reuse, has gained a lot of attention in the water treatment industry. more and more widely used. Under normal circumstances, for example: microfiltration, ultrafiltration, nanofiltration, reverse osmosis, etc. are not used alone, they generally achieve the purpose of wastewater purification and reuse through a combination of two or three. [0003] During the operation of the integrated membrane system, on the one hand, due to physical and chemical effects, so...

AI Technical Summary

Problems solved by technology

Membrane system scale inhibitors currently on the market: one is scale inhibitors produced by foreign manufacturers, which are effective but expensive; the other is domestic membrane scale inhibitors, which are cheap, but most of them are organic The compounded product of phosphine and polycarboxylic acid is not only less effective in inhibiting bacteria and scale than foreign ones, but also contains many phosphorus-related compounds or organic substances in the formula. If it is discharged, it will cause great harm to water quality.

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