Special antiscaling agent for nitrate section of salt nitrate cogeneration system and preparation method thereof

Abstract

The invention provides a dedicated anti-scale agent for a sulfate section of a salt and sulfate co-production system. The dedicated anti-scale agent is prepared by mixing sucrose phosphate, sodium gluconate, a tartaric acid-malic acid-sodium hypophosphite telomer and purified water according to a certain proportion. Being added into a sulfate section mother liquid of the salt and sulfate co-production system, the anti-scale agent can effectively prevent Ca<2+> and Mg<2+> from generating non-soluble salt crystals, so as to avoid scaling, causing reduction of heat-transfer property and evaporation efficiency, of Ca<2+> and Mg<2+> in sulfate producing equipment, reduce cleaning frequency, remarkably prolong the operation cycle of the sulfate producing equipment, improve sulfate producing efficiency, and improve the quality level of a sulfate product. Moreover, the anti-scale agent can form a corrosion-resistant protecting film on the metal surface of the equipment, so as to reduce corrosion of the mother liquid to the sulfate producing equipment. Adoption in sulfate producing equipment in five salt and sulfate co-production enterprises in China shows that the effects of energy conservation, scaling prevention, stable yield and quality improvement are excellent.

Description

technical field [0001] The invention relates to an anti-scaling agent, in particular to a special anti-scaling agent for the nitrate section of a salt-nitrate co-production system, which belongs to the technical field of industrial salt production. technical background [0002] In the production of industrial salt and nitrate co-production, the Ca contained in the mother liquor 2+ , Mg 2+ It is very easy to form process fouling in the salt and nitrate co-production nitrate production equipment, resulting in an increase in the heat transfer resistance of the equipment, a substantial decrease in the heat exchange efficiency of the heating chamber and preheater, an increase in the steam pressure of the heat source, and an increase in energy consumption, affecting normal production. Need to stop production frequently for cleaning and descaling. [0003] In the combined production process of salt and nitrate, due to the difference in the production process conditions of salt ma...

AI Technical Summary

Problems solved by technology

[0002] In the production of industrial salt and nitrate co-production, the Ca contained in the mother liquor 2+ , Mg 2+ It is very easy to form process fouling in the salt and nitrate co-production nitrate production equipment, resulting in an increase in the heat transfer resistance of the equipment, a substantial decrease in the heat exchange efficiency of the heating chamber and preheater, an increase in the steam pressure of the heat source, and an increase in energy consumption, affecting normal production. Need to stop production frequently for cleaning and descaling

[0003] In the combined production process of salt and nitrate, due to the difference in the production process conditions of salt making and nitrate making, the scale inhibitor added in the salt making brine cannot effectively prevent the scaling of the nitrate making equipment in the nitrate section; The nitrate equipment still scales quickly, and frequent shutdowns are required for cleaning and descaling

Therefore, currently used salt-making antiscalants cannot solve the problem of fouling of nitrate production equipment

So far, there is no special scale inhibitor for nitric acid production suitable for solving the scaling problem in the nitric acid section of salt nitric co-production, and there is no invention patent information for this type of scale inhibitor