Scale inhibitor for reverse osmosis membrane as well as preparation method and application of scale inhibitor

Abstract

The invention belongs to the field of scale inhibitors, and particularly relates to a scale inhibitor for a reverse osmosis membrane as well as a preparation method and application of the scale inhibitor. The scale inhibitor for the reverse osmosis membrane scale inhibitor provided by the invention comprises the following components: 5-10 wt% of etidronic acid, 5-10 wt% of polyamino polyether methylene phosphonate, 5-10 wt% of 3-phosphonobutane-1,2,4 tricarboxylic acid, 5-8 wt% of hydrolytic polymaleic anhydride, 5-8 wt% of a carboxylic acid-sulfonic acid-acrylate terpolymer, 5-8 wt% of a phosphono carboxylic acid copolymer, 2 -3 wt% of sodium gluconate and 43-68 wt% of water. The scale inhibitor for the reverse osmosis membrane provided by the invention has good calcium-silicon tolerance, and can effectively solve the problem that the reverse osmosis membrane is easy to scale when treating drainage of a circulating cooling water system.

Description

technical field [0001] The invention belongs to the field of scale inhibitors, in particular to a reverse osmosis membrane scale inhibitor and its preparation method and application. Background technique [0002] The contradiction between the shortage of water resources and the aggravation of water environmental pollution in my country is becoming increasingly prominent. Improving the comprehensive utilization rate of water resources, especially the reuse rate of urban sewage and industrial wastewater, is an effective way to solve the shortage of water resources in our country. Circulating water cooling water system is the main part of industrial water, and improving the reuse rate has great social and economic benefits. [0003] At present, the main ways to increase the recycling rate of circulating cooling water are: (1) increasing the concentration multiple of circulating cooling water system; (2) using membrane technology to reuse the drainage of circulating cooling wate...

AI Technical Summary

Problems solved by technology

The fouling of the reverse osmosis membrane will seriously affect the efficiency of the equipment, and reduce the water production rate and water quality to varying degrees.

At present, reverse osmosis scaling can only be restored by pickling, while the drainage of the circulating water system has been concentrated several times, and various insoluble salts (such as calcium sulfate, calcium carbonate, silicate, etc.) have become saturated , easy to precipitate, and most inorganic salts are difficult to clean, which seriously restricts the application of reverse osmosis technology in the drainage reuse of circulating cooling water systems

Images