Super-branched chain reverse osmosis scale inhibitor with net structure as well as preparation method and application of super-branched chain reverse osmosis scale inhibitor

Abstract

The invention provides a super-branched chain reverse osmosis scale inhibitor with a net structure. The super-branched chain reverse osmosis scale inhibitor is characterized by being prepared from substances containing the following components: the mass ratio of an acrylic acid-2-acrylamido-2-methylpropane sulfonic acid copolymer to a mixture of polyamino polyether methylene phosphonate and organic phosphine derivatives to tricarboxylic acid is (2-2.5):1:(0.5-1); the mass of water is 1-1.5 times as much as the sum of masses of the acrylic acid-2-acrylamido-2-methylpropane sulfonic acid copolymer, the mixture of polyamino polyether methylene phosphonate and organic phosphine derivatives and tricarboxylic acid; the mass of a crosslinking agent is 0.5-1% of the mass of the water; and the concentration of an organic acid catalyst in the water is 0.5-1 mol / L. A scale inhibitor is capable of effectively preventing carbonate, sulfate, metal oxide and silicon dioxide from blocking a reverse osmosis membrane and effectively realizing sterilization.

Description

technical field [0001] The invention relates to the technical field of scale inhibitors, in particular to a network-structured hyperbranched reverse osmosis scale inhibitor and its preparation method and application. Background technique [0002] As people pay more and more attention to water resources, more and more enterprises use reverse osmosis system or nanofiltration system to reuse reclaimed water to reduce emissions. In order to prevent fouling of reverse osmosis system or nanofiltration system, it is necessary Antiscalants are used to inhibit scale in the system. However, because the water quality of reused water is much worse than that of conventional surface water or groundwater, therefore, for the reuse of such water quality, especially for some landfill leachate and printing and dyeing wastewater, the water before pretreatment into the membrane is generally treated with biochemical treatment. , high microbial content, after biochemical treatment, the macromolec...

AI Technical Summary

Problems solved by technology

However, because the water quality of reused water is much worse than that of conventional surface water or groundwater, therefore, for the reuse of such water quality, especially for some landfill leachate and printing and dyeing wastewater, the water before pretreatment into the membrane is generally treated with biochemical treatment. , high microbial content, after biochemical treatment, the macromolecular organic content of the water is still > 50mg / L, and the film feed water has high hardness, high sulfate radicals, and high metal oxide content, etc.

[0003] However, the existing reverse osmosis antiscalants on the market are difficult to meet the osmotic requirements of the above water quality. Once the above pollutants exist, the reverse osmosis membrane will be easily fouled, and it will be difficult to clean after fouling, and it will be difficult to clean after fouling. As a result, some systems need to be cleaned once every 1 to 2 months, while some systems have to be cleaned even half a month, which seriously affects the service life of the membrane.