Single-chamber vacuum cooling crystallization system

Abstract

The invention belongs to the technical field of cooling crystallization equipment, and particularly relates to a single-chamber vacuum cooling crystallization system. The system comprises a single-chamber crystallizer, a crystallization feed liquid circulating system, a condensate circulating system and a vacuum pump, a crystallization cavity is formed in the single-chamber crystallizer, a horizontal partition plate is arranged in the crystallization cavity, the liquid level surface of the crystallization cavity is arranged below the horizontal partition plate, the crystallization feed liquidcirculating system comprises a main discharge pipe and a slurry circulating pipeline, and the condensate circulating system comprises a condenser, a heater, a condensation liquid storage tank and a pipeline for connecting the condenser, the heater and the condensation liquid storage tank. The single-chamber vacuum cooling crystallization system can be widely applied to crystallization and purification production of various inorganic and organic chemical products with large solubility curve changes, and has the characteristics of short process flow, small occupied area, low investment and flexible operation.

Description

technical field [0001] The application belongs to the technical field of cooling and crystallization equipment, and in particular relates to a single-chamber vacuum cooling and crystallization system. Background technique [0002] The continuous cooling crystallization device is a device often used in the crystallization process of chemical products. The device adopts a horizontal crystallizer as a whole, and the interior is divided into several chambers, and each chamber is connected to each other through an overflow pipe; each chamber is equipped with a pusher mixer. After the crystallization feed liquid enters the continuous cooling device, as the temperature of the solution drops to the boiling point, the evaporation of the liquid is balanced with the sensible heat, and then enters the next chamber step by step, and the solution temperature decreases with the pressure of each chamber. After the second chamber, the crystallization feed liquid begins to crystallize, and g...

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Problems solved by technology

[0004] In order to solve the above-mentioned technical problems, the purpose of this application is to propose a single-chamber vacuum cooling crystallization system. The system uses a single-chamber crystallizer, and the evaporation area is increased by setting a horizontal partition in the crystallization chamber to achieve the same level as the multi-stage crystallizer. At the same time, the system is equipped with a condensate circulation system, and the crystallizer and the discharge pump are regularly cleaned by evaporating condensate, thus solving the problems of low crystallization discharge rate and difficult cleaning of the existing crystallization device

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