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Recover method for acid mist generated by acid hydrolysis reaction in citric acid production

A recovery method, citric acid technology, applied in chemical instruments and methods, carboxylate preparation, carboxylate preparation, etc., can solve the problems of product yield reduction, citric acid mist loss, atmospheric environment pollution, etc., to improve The effect on product yield

Inactive Publication Date: 2016-06-15
程洪光
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the violent acidolysis reaction, a large number of tiny droplets (acid mist) of citric acid will be produced at the same time and discharged directly into the air, polluting the atmospheric environment
The loss of semi-finished citric acid mist also reduces the product yield

Method used

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  • Recover method for acid mist generated by acid hydrolysis reaction in citric acid production

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Embodiment Construction

[0016] see figure 1 As shown, the present invention provides a method for recovering acid mist produced by acidolysis reaction in the production of citric acid, including the acidolysis reaction still in the existing production process and the acidolysis reaction in the still, and also includes the following steps:

[0017] (1) Collect the clarified supernatant of milk of lime as the circulating fluid of the spray tower;

[0018] (2) Pump the above circulating liquid into the spray tower, and form the circulating liquid to circulate and spray in the tower;

[0019] (3) The acid mist outlet of the acidolysis reaction kettle is connected with the air inlet of the spray tower through the pipeline, and the citric acid mist generated in the acidolysis reaction kettle is introduced into the spray tower through the pipeline, and is sprayed and absorbed by the circulating liquid , to generate calcium citrate and water, and the tail gas is discharged through the outlet of the spray to...

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Abstract

The invention discloses a recovery method for acid mist generated by an acid hydrolysis reaction in citric acid production. The recovery method comprises an acid hydrolysis reactor in the existing production process and acid hydrolysis reaction in the reactor, and further comprises the steps of (1) collecting liquid supernatant after lime milk is clarified as circulating fluid of a spray tower; (2) pumping the circulating fluid into the spray tower, and circularly spraying in the spray tower; (3) introducing the acid mist of the citric acid generated in the acid hydrolysis reaction into the spray tower, and receiving the spray and absorption of the circulating fluid; (4) spraying the circulating fluid to the end, then entering into a filter tank for washing and filtering, and obtaining calcium citrate; (5), putting the obtained calcium citrate back to the acid hydrolysis reactor, and performing acid hydrolysis reaction again. According to the recovery method disclosed by the invention, the pollution of the acid mist of the citric acid to atmospheric environment can be removed or reduced; meanwhile, 90 percent or over 90 percent of lapsed citric acid of semi-finished product in the acid mist can be recovered and reused, and the product yield is improved by about 1 percent.

Description

technical field [0001] The invention relates to the field of citric acid production, in particular to a method for recovering acid mist generated by acidolysis reaction in citric acid production. Background technique [0002] Citric acid products are cultivated by microbial strains inserted into the culture medium, then put into seed tanks for cultivation, and then put into fermentation tanks for fermentation. After successful fermentation, the fermentation liquid is heated and then filtered to remove the mycelium. The obtained filtrate is is a crude citric acid solution. The press-filtered filtrate enters the neutralization reactor, and undergoes neutralization reaction with the added calcium carbonate milk to generate calcium citrate (or generate calcium hydrogen citrate after secondary neutralization) and wash with hot water and suction filter to remove the residual sugar Obtain clean calcium (hydrogen) citrate, enter the acidolysis reaction kettle and prepare calcium ci...

Claims

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Application Information

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IPC IPC(8): C07C51/41C07C51/02C07C59/265
CPCC07C51/412C07C51/02C07C59/265
Inventor 王欣翟亮程洪光
Owner 程洪光
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