Temperature control system for crystal phosphoric acid production

Abstract

The invention discloses a temperature control system for crystal phosphoric acid production, which comprises a crystallizer and two plate heat exchangers. The temperature control system for the crystal phosphoric acid production is characterized in that one plate heat exchanger is a refrigeration heat exchanger, and the other plate heat exchanger is a heating heat exchanger; the inlets of the two plate heat exchangers are both provided with valve control; and the crystallizer and the two plate heat exchangers are connected in series by pipelines. During the cooling and temperature-lowering operation, the refrigeration heat exchanger is switched on, and the heating heat exchanger is switched off to quickly cool technical circulating water; after scales are removed by heating and temperature rising, the heating heat exchanger is switched on, and the refrigeration heat exchanger is switched off to quickly raise the temperature of the technical circulating water; and temperature rising speed is high; and the temperature rising process is easy to control. The temperature control system for the crystal phosphoric acid production has the advantages of simple, practical and effective structure, and convenience and safety in operation, and is suitable for the temperature control of the crystal phosphoric acid production.

Description

technical field [0001] The invention relates to crystal production by a crystallization method, in particular to a temperature control system for crystal phosphoric acid production. Background technique [0002] The crystallization method is used to produce crystalline phosphoric acid. Phosphoric acid crystals have high requirements for production equipment. The crystals are difficult to control and the crystallization conditions are harsh. Phosphoric acid crystallization and crystal growth need to be carried out at a relatively low temperature. During the crystallization and crystal growth process, the Crystal scale is formed on the inner wall of the crystallizer, and the thickness of the crystal scale increases with time. The crystal scale attached to the inner wall of the crystallizer will seriously hinder the heat transfer during cooling, so as to affect the cooling rate, prolong the cooling crystallization time, reduce production efficiency and increase production cost....

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the defects of the prior art, to provide a temperature control system for the production of crystalline phosphoric acid, to solve the problem of cooling and crystallization in the production process of crystalline phosphoric acid and realize short Quickly raise the temperature to remove crystal scale, and do not cause confusion between media, improving production efficiency

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