Forced circulation continuous crystallization system with mechanical vapor recompression function

Abstract

The invention discloses a forced circulation continuous crystallization system with a mechanical vapor recompression function and relates to a continuous crystallization system which comprises a crystallizer, a compressor and a heater. The bottom of the crystallizer is connected with a circulation pipe; the other end of the circulation pipe is connected with a feed inlet of a circulation pump; the feed outlet of the circulation pump is connected with a discharge pipe; the other end of the discharge pipe is connected with the feed inlet of a discharge pump; the feed outlet of the discharge pump is connected with a finished product tank; the top of the crystallizer is connected with the inlet of the compressor through a pipe; a lower seal head is connected with the circulation pipe; one side of the lower seal head is connected with a feeding pipe which is provided with a ball valve and a feeding pump; the other end of the feeding pipe is connected with a raw material tank; an upper seal head is connected with the crystallizer through a pipe; a shell side is arranged outside the heater and is communicated with the outlet of the compressor through a pipe; the heater is connected with a vacuumizing pipe; and the shell side is also connected with a condensed water discharge pipe. The forced circulation continuous crystallization system with the mechanical vapor recompression function can meet the crystallization production requirement on continuous feeding and charging; and the compressor is used to collect secondary vapor, thereby saving energy sources.

Description

technical field [0001] The invention relates to a continuous crystallization system, in particular to an energy-saving continuous crystallizer, that is, a forced circulation continuous crystallization system with mechanical steam recompression. Background technique [0002] The traditional crystallization equipment is to first put the solution to be crystallized into the crystallizer, and then run the equipment for a period of time. When the solution is concentrated and concentrated to a certain crystallization amount, turn on the discharge pump to discharge the crystal slurry, and wait for the crystal slurry to be emptied again. Open the feed valve to load the stock solution, repeat the above process. This makes continuous production impossible for production gaps. In addition, traditional crystallization equipment usually discharges the secondary steam generated by the crystallizer directly or discharges it after being condensed by a condensing device. This not only wast...

AI Technical Summary

Problems solved by technology

This not only wastes the latent heat of the secondary steam and wastes energy, but also has to add a set of condensing equipment for condensing the secondary steam, which not only increases investment but is not environmentally friendly and economical

In addition, traditional crystallization equipment is generally evaporated under normal pressure, which is unfavorable for some heat-sensitive materials that require low-temperature evaporation

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