Production method and device for sodium gluconate energy-saving triple effect concentration and crystallization

Abstract

The invention discloses a production method and a device for sodium gluconate energy-saving triple effect concentration and crystallization. The continuity of sodium gluconate concentration and crystallization can be realized, that is, a raw material liquid enters a preheater continuously; the moisture can be evaporated after passing through 1st, 2nd and 3rd effect heating evaporators and 1st, 2nd and 3rd effect separators; the 2nd steam is separated continuously to heat and evaporate materials in the 1st, the 2nd and the 3rd effect heating evaporators; the crystal of sodium gluconate is separated out in the 3rd effect heating evaporator and pumped out continuously; therefore, the process of feeding, concentration and crystallization, and crystal separation at the same time is formed continuously, the 2nd steam is fully utilized, the steam consumption for evaporating moisture is 0.28 Tsteam / Twater, the crystallization rate achieves 65%, and materials can form a large amount of crystal in the 3rd effect heating evaporator. The invention can improve the productivity, reduce the steam consumption and improve the quality of products.

Description

technical field [0001] The present invention relates to a kind of production method that the present invention relates to sodium gluconate extraction, also relate to the device that implements this method. Background technique [0002] At present, the concentration and crystallization process of sodium gluconate in China adopts a batch method, the concentration equipment used adopts single-effect or double-effect, and the crystallization adopts a separator with a cooling device; In the efficient heating evaporator, under the vacuum of -0.085Mpa, heat and evaporate to a certain concentration, discharge the vacuum, put it into a crystallizer with a cooling device, and crystallize sodium gluconate crystals after more than ten hours of cooling; The disadvantages are large steam consumption, low output, dark product color and low crystallization rate. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a production metho...

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Problems solved by technology

[0002] At present, the concentration and crystallization process of sodium gluconate in China adopts a batch method, the concentration equipment used adopts single-effect or double-effect, and the crystallization adopts a separator with a cooling device; In the efficient heating evaporator, under the vacuum of -0.085Mpa, heat and evaporate to a certain concentration, discharge the vacuum, put it into a crystallizer with a cooling device, and crystallize sodium gluconate crystals after more than ten hours of cooling; Disadvantages are large steam consumption, low output, dark product color and low crystallization rate

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