Antiscalant for reverse osmosis

Abstract

The invention discloses a novel reverse-osmosis scale inhibitor which comprises the following raw materials in parts by weight: 2-8 parts of sodium citrate, 33-45 parts of hydrolytic polymaleic anhydride, 28-37 parts of polyepoxysuccinic acid salt, 9-15 parts of urotropine, 13-20 parts of polylactic acid, and 40-50 parts of water. A preparation method comprises the following steps: adding sodium citrate, hydrolytic polymaleic anhydride, polyepoxysuccinic acid salt, urotropine and half of water into a reaction kettle, heating to 40-50 DEG C, and stirring for uniformly dissolving; dissolving polylactic acid with the rest water to obtain a polylactic acid solution; heating the materials in the reaction kettle to 70-75 DEG C, dropwise adding the polylactic acid solution, and keeping the temperature for 3-4h after the dropwise adding is finished; and cooling to room temperature so as to obtain the novel reverse-osmosis scale inhibitor. The novel reverse-osmosis scale inhibitor disclosed by the invention has the scale inhibition rate being up to 95%, is small in adding amount, environmentally friendly, stable in property, and long in storage period, and can be used for solving the problems that existing reverse-osmosis inhibitors mainly are foreign products and are limited in treatment capacity, complex in synthesis, relatively high in production cost, and the like in the prior art.

Description

technical field [0001] The invention relates to a scale inhibitor, in particular to a novel reverse osmosis scale inhibitor. Background technique [0002] With the advancement of membrane science and technology, reverse osmosis water treatment technology has been widely used in electric power, food, electronics, and chemical industries, and has a wide range of applications in the fields of advanced treatment of industrial water supply and sewage reuse. During the long-term operation of reverse osmosis equipment, due to the high concentration of various ions in the concentrated water, it is easy to generate scale and breed bacteria and algae, which will cause membrane blockage and affect the stable operation of the reverse osmosis system. Membrane fouling and the growth of bacteria and algae can reduce the water production rate of equipment and cause energy waste. In severe cases, membrane elements must be replaced. Membrane elements are the main components of reverse osmosis...

AI Technical Summary

Problems solved by technology

At present, the main reverse osmosis antiscalants include the products of Kinglee Company, Argo Company, and FMC Company of the United States, and there are also some domestic products.