High-hardness water-quality scale inhibition agent

Abstract

The invention relates to a high-hardness water-quality scale inhibition agent comprising organophosphate and a polymeric chemical substance, wherein the organophosphate is prepared by mixing the following components in percentage by weight: 10 percent of hydroxyethylidene diphosphonic acid, 10 percent of polyacrylic acid, 40 percent of citric acid and 40 percent of pure water. On the basis that the traditional scale inhibition and dispersion agent has chelating performance and complexation performance and by the configuration of new materials, the high-hardness water-quality scale inhibition agent increases a function of a PH-regulating scale inhibition method, has lower cost, scale inhibition and good cleaning effect at the same time, especially has better scale inhibition effect for high-hardness water and can not cause secondary pollution to a film system.

Description

technical field [0001] The invention relates to a dispersant for preventing fouling of a membrane system for membrane water treatment, in particular to a high-hardness water scale inhibitor. 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. The back-end fine treatment of the wastewater reuse process generally adopts membrane treatment, such as ultrafiltra...

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that it needs to invest in large exchange equipment, and regularly replace the aging resin, the cost is high, and a lot of water resources are wasted during regeneration; the method of adding acid to adjust the pH only scales the calcium and magnesium combined with carbonate It has a very good effect, but it has little effect on calcium and magnesium scaling and colloidal scale combined with sulfate and fluoride radicals; the method of adding scale inhibitor and dispersant uses its good chelating and complexing properties Blockage, metal pollution, and organic pollution have good control effects; currently, the main raw materials of scale inhibitors and dispersants are organic phosphates, phosphates, polymers, etc., and scale inhibitors and dispersants are generally used in high hardness water for wastewater reuse The amount is relatively large, and the organic components of the scale inhibitor and dispersant itself will cause secondary pollution to the membrane system