Reverse osmosis membrane scale inhibitor and application thereof

Abstract

The invention provides a reverse osmosis membrane scale inhibitor. The reverse osmosis membrane scale inhibitor mainly comprises organic phosphonic acid, organic carboxylic polymers, sulfonic copolymers, a quaternary phosphonium salt, and methane dithiocyanate. The invention further provides an application of the reverse osmosis membrane scale inhibitor in scale inhibition of a reverse osmosis system. When used for reverse osmosis water treatment, the reverse osmosis membrane scale inhibitor provided by the invention can effectively eliminate membrane pollution caused by deposition of CaCO3, CaSO4, SiO2 and silicate; working efficiency of the reverse osmosis system is improved, service lives of the reverse osmosis membrane and reverse osmosis equipment are prolonged, and reverse osmosis cost is reduced; the reverse osmosis membrane scale inhibitor is compatible with various common flocculating agents such as polyaluminum chloride and cationic polyacrylamide; and a pH value is not required to regulate.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a reverse osmosis membrane scale inhibitor and its application. Background technique [0002] The development and application of membrane separation technology has solved high-quality separation problems for many industries, such as pure water production, seawater desalination, brackish water desalination, electronics industry, pharmaceutical and bioengineering, environmental protection, food, chemical, textile and other industries. , Concentration and purification issues, and provide the supporting technology for circular economy and clean production. [0003] Reverse osmosis technology is an important part of membrane separation technology. Membrane separation technology can remove a large number of impurities in water, such as inorganic substances, organic substances, colloids, metal ions, etc., because of its high water quality, low operating cost, no pollution, and easy oper...

AI Technical Summary

Problems solved by technology

At present, most of the scale inhibitors used by various manufacturers are imported from abroad, such as Qingli PTP-0100 from the United States and Bedi MDC220 from the United States. These scale inhibitors are expensive and the treatment costs are relatively high.

Although there are many varieties of antiscalants for reverse osmosis membranes in China, the scale inhibition performance of the products is not high, and the scale inhibition efficiency of the agents cannot reach the scale inhibition level of imported antiscalants for reverse osmosis membranes.

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