Method for preparing ammonium chloride from waste in amino acid production

Abstract

The invention relates to a method for preparing ammonium chloride from wastes in amino acid production, which belongs to the technical field of fertilizer production, and is used for solving the utilization problem of the wastes in the amino acid production. The invention adopts the technical proposal that the method comprises the following steps: a, burning and subliming, namely, placing a sugar-containing ammonium chloride raw material into a burning furnace to burn so as to sublime the ammonium chloride; b, collecting gas, namely, collecting NH4Cl gas generated by burning into a water-soluble crystallizing pond through a flue; c, crystallizing and depositing, namely, dissolving the NH4Cl entering the water-soluble crystallizing pond into water until the NH4Cl after saturation is crystallized and deposited; and d, air-curing and drying, namely, extracting NH4Cl solid deposited in the water-soluble crystallizing pond, and air-curing and drying the solid to obtain a finished product. The nitrogen content of the obtained ammonium chloride can reach more than 25 percent, and the method has simple process, less equipment investment, easy operation, low price and easily-obtained raw material and obvious value-added effect, can reduce the environment pollution caused by the wastes, and creates value for enterprises at the same time.

Description

technical field [0001] The invention relates to a method for preparing ammonium chloride, in particular to a method for preparing ammonium chloride from amino acid production waste, and belongs to the technical field of chemical fertilizer production. Background technique [0002] In recent years, with the rapid development of science and technology, amino acids have been widely used in food, medicine, feed, pesticides and other fields, and the market demand for amino acids is also increasing day by day. However, in the production process of amino acids, especially a large number of small and medium-sized production enterprises, a large amount of waste will be generated. This waste contains ammonium chloride, but it also contains high sugar, water and other impurities. After testing, this slag contains 60-80% NH 4 CL, the equivalent N content is 16-22%, sugar content is about 2-8%, water content and various impurities are 15-28%. At present, there is no suitable treatment ...

AI Technical Summary

Problems solved by technology

If it is directly used as a chemical fertilizer, it will not meet the product standard requirements. If it is used as the basic raw material for the production of compound fertilizers, it cannot be used in large quantities due to its high sugar content and high viscosity, so it can only be added to the base in a small amount. Used in raw materials, limited digestibility

Therefore, a large part of the waste generated with amino acid production is discarded as waste, which not only causes waste, but also pollutes the environment.

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