Coking sewage reuse reverse osmosis membrane scale inhibitor and preparation method thereof

Abstract

The invention relates to a coking sewage reuse reverse osmosis membrane scale inhibitor and a preparation method thereof. The scale inhibitor is prepared from, by weight, 10-30 parts of chelating agent, 15-25 parts of dispersant, 5-10 parts of nonionic surfactant; 1-5 parts of synergist and 30-55 parts of water. The preparation method comprises the step of mixing all raw material components evenly. According to the coking sewage reuse reverse osmosis membrane scale inhibitor and the preparation method thereof, the scale inhibitor has better emulsifying and dispersing scale inhibition effects on organic matter in the coking sewage, high turbidity and high salt content; when the scale inhibitor is continuously used, the concentration is only maintained to 5-10 ppm, so as to prohibit the formation of the reverse osmosis membrane surface dirt; the surface of the reverse osmosis membrane is kept clean; permeant flux of reverse osmosis membrane is stable; the normal operation of a reverse osmosis membrane device is ensured.

Description

technical field [0001] The invention relates to the technical field of coking wastewater reverse osmosis membrane treatment, in particular to a coking sewage reuse reverse osmosis membrane scale inhibitor and a preparation method thereof. Background technique [0002] In recent years, the continuous development of the global economy and the Chinese economy has formed a pull on basic industries such as iron and steel. China's coke output in 2008 was 327.57 million tons, accounting for more than 50% of the world's total output. The coking plant mainly produces coke, gas, benzene, tar, ammonia, phenol and other chemical products. In the process of gas washing, cooling, purification and chemical product recovery and refining, a large amount of waste water is generated. Its main sources are: coal carried into water, reaction water and coking products, steam and fresh water added in distillation and washing, waste water condensed or separated after contacting with gas and product...

AI Technical Summary

Problems solved by technology

Since the organic matter in coking wastewater (phenolic compounds and benzene compounds, pyrrole, naphthalene, furan, imidazole, pyridine, carbazole, biphenyl, terphenyl) has no emulsification and dispersion effect, the effect still needs to be strengthened and cannot be adapted High organic matter, salt content, high turbidity, high organic matter, oil content, sulfide, ammonia nitrogen, heterotrophic bacteria, high hardness, high pH value, etc. in the coking wastewater reuse system

Images