Concentrating crystallization process for tryptophan or glyphosate by using mechanical vapor recompression technology

Abstract

The invention relates to a concentrating crystallization process for tryptophan or glyphosate by using a mechanical vapor recompression technology. According to the process, secondary vapor separated by a crystallizer is compressed by a vapor compressor, is introduced into a heater to heat and concentrate tryptophan or glyphosate, and then is sequentially subjected to heat emission, condensation and discharging; the tryptophan or the glyphosate is mixed with a mother liquor, and the resulting mixed material is output through a pump and then is mixed with a circulating liquid; the resulting mixture is output to the heater through an circulation pump; after heat absorption is performed, the resulting material enters the crystallizer to carry out boiling evaporation, secondary vapor is separated, and the material liquid is continuously circulated; when the material liquid reaches a preset concentration, one part of the material liquid is output to a magma tank through a material discharge pump, and the other part of the material liquid is adopted as the circulating liquid to continuously participate in the circulation; the concentrated solution entering the magma tank enters a centrifuge, centrifugation is performed to obtain a crystal and the mother liquor, wherein the mother liquor enters a tank. According to the present invention, continuous feeding and continuous discharging are achieved in the whole process; advantages of energy saving, investment saving, and operation cost reducing are provided; tryptophan or glyphosate and other heat-sensitive materials can be subjected to concentrating crystallization at a low temperature so as to ensure product quality and save energy.

Description

technical field [0001] The invention relates to a tryptophan or glyphosate concentration and crystallization process of mechanical vapor recompression technology, which is applied to the low-temperature concentration and crystallization of tryptophan or glyphosate solution, realizes system heat recovery, greatly reduces energy consumption, and belongs to energy saving emission reduction area. Background technique [0002] At present, the known concentration and crystallization of tryptophan or glyphosate solutions all adopt the multiple-effect evaporation method. This method needs to continuously provide heating steam, and add condensing equipment at the end of the system to condense the secondary steam discharged from the final effect heater. This not only increases the equipment investment but also wastes the latent heat contained in the secondary steam. Nowadays, with the increasingly tense energy and environmental situation, energy conservation and emission reduction h...

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Problems solved by technology

This not only increases the equipment investment but also wastes the latent heat contained in the secondary steam

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