Recycling method of glutamic acid crystalloblastic mother liquor

Abstract

The invention discloses a recycling method of glutamic acid crystalloblastic mother liquor, belonging to the technical field of manufacturing of glutamic acid. The method comprises the following steps: 1) carrying out glutamic acid extraction technique to generate alpha-glutamic acid and extraction raffinate, carrying out crystalloblastic treatment on the alpha-glutamic acid, regulating the pH value of the crystalloblastic mother liquor, carrying out three-stage gradient cooling treatment, carrying out vacuum filtration on the liquid obtained by the last-stage cooling treatment, and collecting secondarily extracted beta-glutamic acid and secondary mother liquor; 2) carrying out high-temperature jet mixing on the secondary mother liquor and sulfuric acid to obtain a jet mixed solution; and 3) using the extraction raffinate in the step 1) as spray liquor, cooling high temperature generated in the high-temperature jet mixing process, absorbing flue gas with the cooled mixed solution, and using the spray collection solution obtained from the outlet of the spray tower for heating before filtering the protein extracting solution and for preparation of the glutamic acid extracting solution. Compared with the prior art, the invention lowers the system load, acid / alkali consumption and electricity consumption, enhances the production efficiency, and implements reutilization of waste and heat calorie.

Description

technical field [0001] The invention belongs to the technical field of glutamic acid production, and in particular relates to a method for reusing glutamic acid modification crystal mother liquor. Background technique [0002] At present, in the production process of glutamic acid, the α-crystalline glutamic acid product obtained after the glutamic acid fermentation liquid is subjected to isoelectric extraction and centrifugation, the content of macromolecular colloidal impurities, pigments, and sulfates in such glutamic acid products Higher, especially the sulfate content, directly affects the use of the product. Therefore, the industry mostly obtains high-quality β-glutamic acid through the crystal modification process, which makes the glutamic acid crystals in a certain Under certain conditions, the quality of glutamic acid products can be improved through the transformation from α-crystal form to β-crystal form. [0003] In the existing glutamic acid processing and prod...

AI Technical Summary

Problems solved by technology

However, these existing technologies have their own shortcomings, such as high mother liquor content, large volume ratio of mother liquor per ton of product, and reuse in production, resulting in a large circulation of the production system, increasing the load on the production system, reducing production efficiency, and causing acid, alkali, High steam and electricity consumption, high product cost, etc.

The prior art method produces 1 ton of metamorphic glutamic acid to produce 1.25 tons of metamorphic mother liquor, the volume ratio is generally above 1.25, the content is above 14-16%, and the acid consumption is about 1 ton

[0004] In addition, during the acidolysis process of the mother liquor, a large amount of flue gas and waste heat are generated in the acidolysis maintenance tank, and water spray is used to absorb the flue gas and cool down. The collected liquid requires a large number of cooling devices, and the spray collected liquid after multiple cycles is discharged to the sewage plant, which increases the pressure of sewage treatment

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