Reverse osmosis compound scale inhibitor

Abstract

The invention provides a reverse osmosis compound scale inhibitor and belongs to the field of reverse osmosis water treatment. The scale inhibitor comprises the following components in percentage by weight: 10 to 20 percent of 1-hydroxyethylidene-1,1-diphosphonic acid, 30 to 40 percent of hydrolytic polymaleic anhydride, 30 to 40 percent of polyacrylic acid and 10 to 20 percent of sulfonated styrene-maleic anhydride copolymer, and the scale inhibitor comprises also comprises a bactericide. The reverse osmosis compound scale inhibitor fully utilizes the synergistic effect among organic phosphorous scale inhibitors, polycarboxylic acid scale inhibitors and sulfonic acid scale inhibitors, has good scale inhibition and dispersion performance; and when used in a reverse osmosis water inflow system, the scale inhibitor can effectively lighten pollution of calcium carbonate, calcium sulfate and silicate to reverse osmosis membranes and prolongs the cleaning period and service life of the reverse osmosis system.

Description

[0001] technical field [0002] The invention relates to a reverse osmosis water treatment material, in particular to a reverse osmosis composite scale inhibitor capable of reducing membrane fouling. Background technique [0003] Reverse osmosis is a membrane separation technology that originated in the 1960s and has been widely used in water treatment. In some coastal areas where fresh water resources are scarce, reverse osmosis is used for seawater desalination to provide fresh water for people's production and life. At the same time, as a high-purity water preparation technology, reverse osmosis can meet the water requirements of semiconductor, microelectronics, electric power, chemical industry, medicine and other fields. In today's increasingly scarce water resources, reverse osmosis has also been widely used in wastewater treatment as advanced wastewater treatment technology and water resource reuse technology. [0004] In the reverse osmosis water treatment process,...

AI Technical Summary

Problems solved by technology

[0006] 1. The technical problem to be solved by the invention: In view of the limited use conditions of the existing composite scale inhibitors used in reverse osmosis systems and easy to cause pollution, the present invention aims to provide a composite scale inhibitor for reverse osmosis, which can be used for reverse osmosis Osmosis process, reduce membrane fouling, improve operating efficiency of reverse osmosis system, prolong operating life