Calcium gluconate continuous crystallization system and process

Abstract

The invention relates to a calcium gluconate continuous crystallization system and process. The system comprises an MVR evaporator, a three-stage vacuum flash crystallizer, a steam jet vacuum pump, amixing condenser, a heat exchanger, a pulp tank, a centrifuge, a granulator and a drying machine. The process includes steps: feeding calcium gluconate supernatant into the MVR evaporator, concentrating until the material concentration reaches 50-52%, feeding into the multi-stage vacuum flash crystallizer for flash continuous cooling crystallization, allowing crystal paste to enter the slurry tankafter crystallization, centrifuging in the centrifuge to obtain a crystal material, cleaning impurities with pure water, granulating in the granulator, and drying through a boiling bed to obtain a finished product of calcium gluconate. The defect of intermittent crystallization is completely overcome, continuity in production and crystallization of calcium gluconate is realized, compact equipmentstructure and small floor area are realized, energy consumption and production cost are sharply reduced, operating efficiency is improved, and energy is saved by 40-50%. In addition, crystal particleforce uniformity, surface smoothness and product quality stability are realized.

Description

technical field [0001] The invention relates to the field of calcium gluconate crystallization, in particular to a vacuum flash cooling continuous crystallization system and process for calcium gluconate. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Calcium gluconate has important uses in medicine, food, chemical industry, etc., especially in medicine, calcium gluconate helps bone formation, and maintains the normal and excitability of nerves and muscles, and has become the first choice for people to supplement calcium product. The production process of calcium gluconate is mainly composed of three parts: glucose oxidation to gluconic acid, gluconic acid and calcium n...

AI Technical Summary

Problems solved by technology

[0004] The evaporation, concentration and crystallization link in the refining process is directly related to the production cost and product quality of the product. At present, the static crystallization process after rapid cooling in calcium gluconate crystallization accounts for more than 95% of the domestic calcium gluconate industry, which has high energy consumption and accounts for Large area, low degree of automation, low labor productivity and other problems, more importantly, uneven crystal size and difficult dehydration, which seriously affect the quality of the product

[0005] In the patent CN201810245150.7, a continuous cooling and rapid crystallization method of calcium gluconate is disclosed, which mainly includes the steps of dissolution, oxidation, concentration, filtration, decolorization, kinematic crystallization, and drying. This invention improves the preparation method of calcium gluconate Detailed description, but the description of the continuous cooling crystallization system and process is not clear

[0006] In the patent 201410543277.9, a vacuum flash cooling continuous crystallization device is disclosed. The main equipment used in this invention is a self-evaporator and a three-stage vacuum flash crystallizer for cooling and continuous crystallization. The self-evaporator needs to be connected to a cooling system and a surface cooler It occupies a large area and has low cooling efficiency. The system has disadvantages such as complex system and huge equipment.

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