Crystallization system for crystalline salt

Abstract

The invention relates to a crystallization system for crystalline salt. On the basis of a traditional two-effect crystallizer, the feeding sequence of the first effect and the second effect is periodically changed, the concentration of strong brine in a first-effect crystallizer and a second-effect crystallizer is periodically changed from a supersaturated solution to an unsaturated solution, a first-effect scaling substance and a second-effect scaling substance can be dissolved, and the operation period of the crystallizer can be prolonged. The crystallization system comprises a feeding first-effect heat exchanger, a second-effect heat exchanger, a first-effect crystallizer, a first-effect upper circulating pipe, a first-effect lower circulating pipe, a second-effect crystallizer, a second-effect upper circulating pipe, a second-effect lower circulating pipe and a second-effect transfer pump, an inlet of the first-effect heat exchanger is connected with the first-effect crystallizer through the first-effect upper circulating pipe, an outlet of the first-effect heat exchanger is connected with the first-effect crystallizer through the first-effect lower circulating pipe, an inlet of the second-effect heat exchanger is connected with the second-effect crystallizer through the second-effect upper circulating pipe, and an outlet of the second-effect heat exchanger is connected with the second-effect crystallizer through the second-effect lower circulating pipe.

Description

technical field [0001] The invention relates to the technical field of high salt water concentration and crystallization, in particular to a crystallization system for crystallization salt. Background technique [0002] At present, in the crystallization system used for the production of crystallized salt, the concentrated brine will foul the crystallizer and heat exchanger during the concentration process, and the fouling will reduce the evaporation, resulting in a reduction in the amount of treated water and salt production. [0003] Nowadays, after the operation period of the crystallization system is about 1 month, the heat exchanger needs to be cleaned once by high pressure, and the cleaning time is usually about 48 hours each time. It is not only time-consuming and laborious, but also seriously reduces production efficiency. Contents of the invention [0004] In order to overcome the deficiencies of the above-mentioned techniques, the object of the present invention...

AI Technical Summary

Problems solved by technology

[0002] At present, in the crystallization system used for the production of crystalline salt, the concentrated brine will foul the crystallizer and heat exchanger during the concentration process, and the fouling will reduce the evaporation, resulting in a reduction in the amount of treated water and salt production

[0003] Nowadays, after the operation period of the crystallization system is about 1 month, the heat exchanger needs to be cleaned once by high pressure, and the cleaning time is usually about 48 hours each time.

Not only time-consuming and labor-intensive, but also seriously reduce production efficiency

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