Hyperbranched reverse osmosis antiscalant with network structure, preparation method and application thereof

Abstract

The invention provides a hyperbranched reverse osmosis scale inhibitor with a network structure, which is characterized in that it is prepared from the following components: acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer, poly The mixture of amino polyether group methylene phosphonic acid and organic phosphine derivatives, the mass ratio of tricarboxylic acid is 2~2.5:1:0.5~1; the quality of water is acrylic acid-2-acrylamide-2-methyl 1 to 1.5 times the mass of propanesulfonic acid copolymer, mixture of polyamino polyether group methylene phosphonic acid and organic phosphine derivatives, and tricarboxylic acid; the mass of the crosslinking agent is 0.5 of the mass of water ~1%; the concentration of inorganic acid catalyst in water is 0.5~1mol / L. The scale inhibitor can effectively prevent the fouling of the reverse osmosis membrane by carbonate, sulfate, metal oxide and silicon dioxide, and the scale inhibitor can effectively kill bacteria.

Description

Technical field [0001] The present invention relates to the field of scale inhibitors, and more particularly to an overbase chain reverse osmotic scale inhibitor of a mesh structure and a preparation method thereof, and an application thereof. Background technique [0002] As people pay more and more attention to water resources, more and more companies use reverse osmosis system or nanofiltration systems to achieve reduced emissions in order to prevent reverse osmosis system or nanofiltration system fouling, need to use resistance Scalers are scale inhibiting the system. However, since the water quality of the water is much worse than the conventional surface water or groundwater, such water quality is in particular for the reuse of some garbage leachate and printing waste, the water body before the film is generally treated. High molecular molecular organic matter content of microbiological content is still from 50 mg / L, and the film inlet is high, high sulfate, high metal ox...

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.