Salt-manufacturing anti-deposition agent and method for preventing salt-manufacturing equipment from scale deposition

Abstract

The invention discloses a method for preventing salt-manufacturing equipment from scale deposition. The method comprises the following steps: during a production process of salt-manufacturing equipment, inputting an anti-deposition agent and brine in the salt-manufacturing equipment; and when the pH value of a salt-manufacturing equipment liquid is greater than 11, adding an anti-deposition agent containing a carboxylate-sulfonate-nonion terpolymer, HPMA and PAA. A salt-manufacturing anti-deposition agent is composed of polymaleic acid, the carboxylate-sulfonate-nonion terpolymer and PAA or composed of PASP, polymaleic acid, the carboxylate-sulfonate-nonion terpolymer and PAA. The method and the salt-manufacturing anti-deposition agent disclosed by the invention have the following advantages: the proper anti-deposition agent for preventing the salt-manufacturing equipment from scale deposition is separated by selecting scale inhibitors for circulation cooling water, and the continuous production of the salt-manufacturing equipment can be guaranteed, the prolonging the scale reduction period of the equipment.

Description

technical field [0001] The invention relates to a method and reagent for preventing scale deposition of salt-making equipment, in particular to a method and reagent for eliminating scale deposition in evaporation tanks and heating chambers in salt production. Background technique [0002] In salt production, fouling of evaporation tanks and heating chambers is a common problem that plagues the salt industry. Once fouling occurs in salt making equipment, it will reduce heat transfer efficiency, reduce production capacity, and increase energy consumption. It is usually solved by regularly stopping production for cleaning and descaling, which will inevitably lead to a reduction in effective production time, thereby affecting production. At present, most of the thenardite-type brine salt production enterprises use the two-alkali method to purify the brine to remove Ca2+ and Mg2+ in the original brine, and at the same time use the technology of extracting nitric acid to remove SO...

AI Technical Summary

Problems solved by technology

Since the Ca2+ and Mg2+ ions in the brine cannot be completely removed, about 5 mg / Kg of Ca2+ and Mg2+ remain, and the brine after purification is alkaline, so when the brine is evaporated and concentrated, it will still be compacted in the heating chamber and the evaporation tank wall And the solid dirt layer, it is difficult to brush off the dirt layer when brushing the tank

When the fouling is serious, the pickling heater and evaporation tank must be stopped, but pickling will corrode the heater and evaporation tank

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