Reverse osmosis membrane special-purpose scale inhibitor and its manufacturing method

Abstract

The invention relates to a reverse osmosis membrane special-purpose scale inhibitor and its manufacturing method. The scale inhibitor contains the following components of: by weight, 5-10 parts of hydroxyethylidene diphosphonic acid and sodium salt, 15-30 parts of amino trimethylene phosphonic acid (ATMP), 10-20 parts of ethylenediamine tetra methylenephosphonic acid and sodium salt, 5-10 parts of ethylene diamine tetraacetic acid disodium salt, 15-30 parts of 2-phosphonic acid-1,2,4-tricarboxyl butane, 15-30 parts of polyacrylic acid and sodium salt, 20-35 parts of an acrylic acid multipolymer, 15-30 parts of an acrylic acid sulfonic acid copolymer, 5-20 parts of hydrolyzed polymaleic anhydride and 30-40 parts of desalted water. The scale inhibitor provided by the invention can be used to effectively control sediments such as CaCO3, Ca3(PO4)2, CaSO4, BaSO4, SrSO4, SiO2 and the like, effectively stabilize Ca<2+> and Mg<2+> ions in process water, prevent the formation of insoluble fouling substances which precipitate to obstruct membrane pores, prevent coalescence of various scale and insoluble salt solids on the surface of the high-molecular reverse osmosis membrane, maintain good water molecule permeability of the reverse osmosis membrane, maintain normal water production capability and stabilize the quality of pure water.

Description

technical field [0001] The invention relates to the technical field of water treatment chemicals, in particular to a special antiscalant for reverse osmosis membranes and a manufacturing method, which is specially used for reverse osmosis (RO) systems, nanofiltration (NF) and ultrafiltration (UF) systems. Antiscalants for permeable membranes. Background technique [0002] The reverse osmosis system passes the raw water through a fine filter, granular activated carbon filter, compressed activated carbon filter, etc., and then pressurizes it through a pump. / 300) reverse osmosis membrane (RO membrane), at the same time isolate industrial pollutants, heavy metals, bacteria, viruses and other impurities mixed into the water, so as to meet the physical and chemical indicators and hygienic standards stipulated for drinking, and the output is clear to pure. Water is the best choice for the human body to replenish high-quality water in a timely manner. The purity of water produced ...

AI Technical Summary

Problems solved by technology

The reverse osmosis membrane is the key equipment of the reverse osmosis system. When the system runs continuously for a long time, calcium and magnesium ions in the water will continue to precipitate and adhere to the surface of the reverse osmosis membrane, forming scaling to block the membrane pores, which will affect the water output efficiency of the reverse osmosis system. damage to reverse osmosis membrane