Preparation method of high-hardness and high-silicon content reverse osmosis membrane antiscalant

Abstract

The invention relates to a preparation method of a high-hardness and high-silicon content reverse osmosis membrane antiscalant. The preparation method comprises the following steps: (1) firstly, adding 500kg of polyamino polyether methylene phosphonate into a 1T of reaction kettle, and stirring for 10min; (2) adding 500kg of polyacrylic acid into a solution, and stirring for 2 hours; and (3) standing for 4 hours to obtain the antiscalant. The preparation method has the beneficial effects that the novel reverse osmosis membrane antiscalant is generated by compounding polyamino polyether methylene phosphonate and polyacrylic acid; the antiscalant can effectively chelate calcium and magnesium ions in water, and simultaneously has a strong anti-scaling capability on calcium carbonate and calcium sulfate; meanwhile, the antiscalant is quite effective to both silicon and silicate; the antiscalant is relatively low in cost, and free from secondary pollution to a membrane system.

Description

technical field [0001] The invention relates to a preparation method of a water quality scale inhibitor, in particular to a preparation method of a reverse osmosis membrane scale inhibitor with high hardness and high silicon content. Background technique [0002] In the current situation of rapid economic development and increasingly serious environmental pollution, the problem of water shortage and water quality deterioration is becoming more and more prominent, so the task of water treatment is becoming more and more important. With the continuous advancement of water treatment technology, reverse osmosis membranes, nanofiltration membranes, and ultrafiltration membranes have gradually become popular in the fields of water purification and sewage reuse. Among them, scale inhibitors and dispersants to prevent scaling of membrane systems are the most popular among them. One of the important medicines. [0003] Reverse osmosis systems are developing rapidly in the field of p...

AI Technical Summary

Problems solved by technology

[0004] Due to the long-term operation of the reverse osmosis system, when the raw water with high hardness and silicon content is treated, calcium carbonate, magnesium carbonate, silicate and other substances in the water will be deposited on the surface of the membrane, resulting in a decrease in the water production of the membrane and a decrease in water production. reduced water quality