High-hardness water scale inhibitor

Abstract

The invention relates to a high-hardness water scale inhibitor, and the preparation comprises the following steps of mixing hexamethylene diamine tetramethylene phosphoric acid, 2-hydroxy phosphorus acetic acid, polyamino polyether methylene phosphonic acid and pure water for preparing an organic phosphate and a polymer chemical substance, wherein the weight percent of the hexamethylene diamine tetramethylene phosphoric acid is 10%, the weight percent of the 2-hydroxy phosphorus acetic acid is 20%, the weight percent of the polyamino polyether methylene phosphonic acid is 20%, and the components are mixed with 50% by weight of pure water. The high-hardness water scale inhibitor has the beneficial effects that the configuration of novel materials leads the high-hardness water scale inhibitor to increase the functions of specially complexing dispersed iron and silicon salt and retarding corrosion on the basis of having the chelating and the complexing performances of the traditional signal scale inhibitor and dispersant; furthermore, the high-hardness water scale inhibitor has low cost and can not cause the secondary pollution to a membrane 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 iron-containing substances in the water will cause irreversible pollution to the conventionally used membrane el...

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that it needs to invest in large exchange equipment and replace the aging resin regularly, the cost is high, and a lot of water resources are wasted during regeneration. In addition, iron also has irreversible damage to the resin; Using iron ions has a good effect, but if there are operational problems, it is easy to cause the flocculant to enter the membrane system; the method of adding scale inhibitors and dispersants takes advantage of its good chelation and complexation performance, and is effective against colloidal fouling, calcium and magnesium pollution, Organic pollution has achieved a good control effect; currently the main raw materials of scale inhibitors and dispersants are organic phosphates, phosphates, polymers, etc., in water containing a large amount of iron ions, the amount of scale inhibitors The organic components of the dispersant itself cause secondary pollution to the membrane system