Device and method for evaporation and crystallization of sodium gluconate solution

Abstract

The invention belongs to the technical field of thermal crystallization for evaporation of a sodium gluconate solution, and particularly relates to a device and a method for evaporation and crystallization of the sodium gluconate solution. A system for recompressing and utilizing secondary steam produced through evaporation is adopted, the secondary steam produced by an evaporation system is compressed and heated by an energy-efficient steam compressor, the enthalpy value of the secondary steam is increased, the secondary steam with the enthalpy value increased enters the evaporation system to be used as a heat source to be recycled, most live steam is replaced, and the live steam is only used for replenishing the heat loss and replenishing the enthalpy required by the incoming and outgoing material temperature difference, so that the live steam consumption of evaporators is substantially reduced, and energy is saved.

Description

technical field [0001] The invention belongs to the technical field of thermal crystallization of sodium gluconate solution evaporation, and relates to a vapor recompression utilization system and method of a sodium gluconate solution evaporation crystallization process, in particular to a sodium gluconate solution evaporation crystallization device and method. Background technique [0002] In 2009, the total output of my country's fermentation industry was about 16 million tons, with an annual growth rate of 10%. It is estimated that in 2015, the annual output of fermentation industry products will be about 25 million tons, and the steam consumption will be about 200 million tons. 40% of the energy consumption, the steam used in the enrichment section is about 80 million tons. Using mechanical steam recompression technology, the concentrated steam consumption per unit product can be saved by more than 90%. If it is promoted in the whole industry by 20%, it can save about 14....

AI Technical Summary

Problems solved by technology

For the sodium gluconate solution crystallization process, a large amount of cooling water is required to cool the heat of the secondary steam (to condense it) in conventional evaporation, and then the heat of the cooling water is released to the atmosphere through cooling tower cooling, which not only consumes fresh steam, At the same time, the cooling tower consumes a large amount of circulating water and electric energy (pump) operation, resulting in triple waste

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