Acid adding device, as well as method and equipment for producing calcium chloride with acid adding device

Abstract

The invention relates to a method and equipment for producing calcium chloride, in particular to an acid adding device, as well as a method and equipment for producing calcium chloride with the acid adding device. The equipment for producing calcium chloride comprises an acid tank, wherein the acid tank is connected with a calcium liquid pipeline by an acid adding pump; the calcium liquid pipeline is connected with a clear liquid barrel; and the clear liquid barrel is communicated with a triple effect evaporation system by a clear liquid pump. The method for producing calcium chloride with the acid adding device comprises the steps that in a process of conveying a raw calcium liquid to the clear liquid barrel, hydrochloric acid is added to the calcium liquid pipeline by the acid adding device, the calcium liquid and hydrochloric acid enter the clear liquid barrel together to allow impurities in the calcium liquid to fully mix and react with hydrochloric acid, and finally the qualified raw calcium liquid is sent to the triple effect evaporation system by the clear liquid pump for concentration. Compared with the prior art, hydrochloric acid is added to the calcium liquid pipeline by the acid adding device, so that the content of the impurities in the raw calcium liquid is reduced effectively, evaporation and scarring of an evaporative heater are relieved greatly, an operation cycle of the equipment is prolonged, a yield of calcium chloride is increased, and the quality of calcium chloride is improved.

Description

technical field [0001] The invention relates to a method and equipment for producing calcium chloride, in particular to an acid adding device and a method and equipment for producing calcium chloride by using the acid adding device. Background technique [0002] At present, many ammonia-soda soda ash plants generally use the discharged ammonia distillation waste liquid to produce calcium chloride. In order to increase the concentration of calcium chloride contained in waste liquid so as to reduce consumption, some ammonia-soda plants have adopted new distillation transformation technology. After the transformation, the concentration of the waste liquid was effectively increased, but a new problem also emerged, that is, the new waste liquid contained more impurities such as gray milk, which caused the heater to scar quickly and more in the subsequent evaporation production process. , affect the heat exchange effect, seriously restrict the output, and increase the consumption...

AI Technical Summary

Problems solved by technology

After the transformation, the concentration of the waste liquid was effectively increased, but a new problem also emerged, that is, the new waste liquid contained more impurities such as ash milk, which caused the heater to scar quickly and more in the subsequent evaporation production process. , affect the heat exchange effect, seriously restrict the output, and increase the consumption of products, and the product alkalinity is high, exceeding the range specified by the national standard

[0003]Calcium chloride manufacturers in the same industry generally directly evaporate and concentrate the raw material liquid for production without pretreatment by acid adding equipment, resulting in a large amount of impurities entering final product, affecting product quality

And cause serious scabbing of the evaporation heater, frequent cleaning, restricting production

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