Novel preparing method for scale inhibitor special for iron-pollution-resistant film

Abstract

The invention discloses a novel preparing method for a scale inhibitor special for an iron-pollution-resistant film, and relates to a preparing method for a film-special scale inhibiting-dispersing agent. The scale inhibitor is prepared from 10%-30% of polyepoxysuccinic acid (PESA), 10%-30% of 2-phosphonobutane-1,2,4-tricarboxylic acid (PBTCA), 5%-15% of an allyl sulfonic acid salt copolymer (AA/AMPS), 1%-5% of styrene sulfonic acid (SS), 2%-8% of hydrolytic polymaleic anhydride (HPMA) and the balance distilled water. According to the scale inhibitor, under the condition of high-alkali, high-hardness and high-pH-value water quality and existence of iron ions, calcium carbonate scale inhibition and calcium sulfate scale inhibition reach 100%, and the scale inhibition performance for silicon dioxide scale, barium sulfate scale, strontium sulfate scale and the like is improved.

Description

technical field [0001] The invention relates to a scale-inhibiting dispersant for water treatment, in particular to a preparation method of a special-purpose scale-inhibiting dispersant for membranes. Background technique [0002] Since the advent of reverse osmosis technology in the 1960s, membrane water treatment technology has been rapidly promoted because of its small footprint, easy operation, low operating costs, high degree of automation, and stable effluent quality. Especially in the process of pure water treatment, pharmaceutical industry water, seawater desalination, cooling tower replenishment, boiler replenishment water and so on. [0003] In the process of membrane treatment, with the deterioration of water quality or the increase of water production rate, insoluble inorganic salts will be deposited on the surface of the membrane. At the same time, organic particles, dust or microorganisms and their metabolites brought in by the water , These will cause membran...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the scale inhibition rate of the existing scale inhibitors is not high under the water quality conditions of high alkali, high hardness, and high pH value, and the presence of iron ions is reduced, and even the scale inhibition performance of organic phosphine scale inhibitors is reduced or even lost. , the new all-organic formula developed by the present invention improves the scale inhibition performance in the presence of iron ions, and at the same time realizes the scale inhibition performance against calcium carbonate, calcium sulfate, silicon dioxide, barium sulfate, etc.