Multistage segmental tower type simulation continuous crystallizer

Abstract

The invention discloses a multistage segmental tower type simulation continuous crystallizer. The multistage segmental tower type simulation continuous crystallizer comprises a plurality of crystallizer units which are serially connected stage by stage, wherein each crystallizer unit comprises a cylinder and a stirrer which is positioned in an inner cavity of the cylinder and is provided with stirring blades; a column tray which is connected with the edge of the inner side of each cylinder in a sealing manner is arranged in the cylinder; the stirrer in the crystallizer at each stage verticallypenetrates through the middle part of the corresponding column tray; the upper end and the lower end of each stirrer are respectively detachably and fixedly connected with the stirrer in the adjacentcrystallizer unit; a base is arranged at the lower end of the lowermost-stage crystallizer unit; an end enclosure is arranged at the uppermost-stage crystallizer unit; two ends of the serial crystallizers are respectively and fixedly connected with the end enclosure and the base by bearings; a feeding hole and a discharging hole which are communicated with the inner cavity of each cylinder are formed in the outer wall of the cylinder; the feeding holes and the discharging holes of all the crystallizer units are serially connected by a pipeline. The crystallizer unit of each stage in the multistage segmental tower type simulation continuous crystallizer disclosed by the invention can maintain lower crystallizing supersaturation, and excessive fine crystals are prevented from being generated; meanwhile, the phenomenon of backmixing of a mother solution is avoided and the crystallizing efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of solution crystallization, in particular to a multi-stage segmented tower-type simulated continuous crystallizer. Background technique [0002] In actual industrial production, the commonly used crystallization processes include cooling crystallization and evaporation crystallization. Both cooling crystallization and evaporative crystallization use the characteristic that the solubility of the solute in the solvent is limited by temperature. The cooling crystallization uses the characteristic that the saturated solubility of the solute in the solvent decreases with the decrease of temperature, and separates the solute from the solvent; The evaporative crystallization is a process in which the solvent in the solution system is continuously reduced through evaporation so that the concentration of the solute is relatively increased to reach a supersaturated state, thereby crystallizing and separating from the...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the technical problems of low efficiency, long cycle and difficulty in making high-purity products in the batch crys

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