Method and device for energy-saving four-effect concentration and crystallization of itaconic acid
A four-effect concentration, energy-saving technology, applied in solution crystallization, evaporative separation crystallization, separation/purification of carboxylic acid compounds, etc., can solve the problems of low equipment efficiency and low energy utilization rate, reduce energy consumption and improve equipment Utilization, productivity improvement and product quality effects
Inactive Publication Date: 2016-09-14
JINAN HUAMING BIOCHEM
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The disadvantage of this method is that the energy utilization rate is low and the equipment efficiency is low.
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[0044] The present invention will be further described below in conjunction with accompanying drawing.
[0045] Such as figure 1 Shown, a kind of itaconic acid energy-saving type four-effect concentrated crystallization method comprises the following continuous steps:
[0046] Feeding step: the itaconic acid filtrate is pumped out from the raw material storage tank 23 with the feed pump 12;
[0047] Preheating step: the itaconic acid filtrate pumped in by the feed pump 12 is preheated with a preheater 2; the preheater 2 is preferably a rising film preheater.
[0048]One-effect concentration and separation step: the preheated itaconic acid filtrate enters the first-effect heating evaporator 3 for heating, and then the itaconic acid solution is sent to the first-effect separator 4 to evaporate and grow crystals, and the first-effect separator 4 The itaconic acid solution that comes out is pumped into the next step by an effect circulation pump 13.
[0049] The heating steam o...
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The invention discloses an energy-saving method and device for four-effect concentration and crystallization of itaconic acid, which can achieve the continuity of concentration and crystallization of an itaconic acid solution, that is, a stock solution enters a pre-heater continuously and is subjected to water evaporation through one-effect / two-effect / three-effect / four-effect heating evaporators and one-effect / two-effect / three-effect / four-effect separators, the secondary vapor separated from the previous-effect separator enters the pre-heater or the next-effect heating evaporator to thermally evaporate materials, and meanwhile, crystals separated from the four-effect separator are pumped out by a crystal slurry pump continuously, so that a process that feeding, concentration via evaporation and crystal discharge can be operated in different periods can be realized, which can allow the materials to form a large amount of crystals in the four-effect separator, thereby improving the productive capacity and product quality, increasing the equipment utilization rate and reducing the vapor consumption by 50%.
Description
technical field [0001] The invention relates to the technical field of evaporation, concentration and crystallization of itaconic acid filtrate, in particular to a method and device for itaconic acid energy-saving four-effect concentration and crystallization. Background technique [0002] At present, the production of itaconic acid at home and abroad generally adopts fermentation method. The method mainly comprises fermented liquid culture, and itaconic acid fermented liquid is obtained after thalline separation, and the obtained itaconic acid fermented liquid is obtained through ion exchange and activated carbon decolorization to obtain itaconic acid filtrate, and the obtained itaconic acid is filtered The liquid is subjected to steps such as evaporation and concentration, coarse crystallization, and fine crystallization to finally obtain itaconic acid crystals. [0003] In the crystallization process of itaconic acid produced by fermentation, the continuous cycle evapora...
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IPC IPC(8): C07C57/13C07C51/43B01D9/02
CPCB01D1/26B01D9/0018C07C51/43C07C57/13Y02P20/10
Inventor 王绍伟韩绍顺王永良陈峰刘玉平
Owner JINAN HUAMING BIOCHEM