Production technology for co-producing potassium sulfate and tripolycyanamide and production equipment thereof

Abstract

The invention discloses a production technology for co-producing potassium sulfate and tripolycyanamide. The production technology comprises the following steps: sending a byproduct hydrochloric acidproduced during production of potassium sulfate to a tripolycyanamide tail gas absorbing tower, washing and absorbing synthetic ammonia in tail gas discharged during production of the tripolycyanamide, enabling produced ammonium chloride liquid to enter a heating concentrating tank, heating for concentrating by using steam, then entering a crystallizing separator, then cooling for crystallizing, and then entering a centrifugal dryer to obtain a finished ammonium chloride product. In such a synthesis process, ammonia and carbon dioxide tail gas produced during the production of the tripolycyanamide are well treated, and the byproduct hydrochloric acid produced during the production of the potassium sulfate is not required to be stored and transported to other regions for achieving application thereof, so that the situation that a potassium sulfate producing device is forced to reduce the load due to overstock of the hydrochloric acid is avoided, the economic loss is reduced, the production process is environmentally friendly and does not cause harm to production personnel and the environment, and the economic benefit is remarkable.

Description

technical field [0001] The invention relates to the technical field of chemical production technology, in particular to a production technology and production equipment for potassium sulfate co-production of melamine. Background technique [0002] Potassium sulfate is a salt composed of sulfate ions and potassium ions, usually in the form of colorless or white crystals, granules or powder, odorless, bitter, hard, chemically inactive, stable in the air, and the aqueous solution is neutral Potassium sulfate, insoluble in ethanol, is a high-efficiency chlorine-free potassium fertilizer, which has obvious yield-increasing effects on various crops, and is mainly used for the planting and compounding of chlorine-avoiding crops, such as tobacco, citrus, watermelon, tea and other economic crops Fertilizer raw materials can not only increase the yield of crops, but also improve the quality of crops. [0003] Melamine is a triazine nitrogen-containing heterocyclic organic compound us...

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Problems solved by technology

[0005] In view of this, the application provides a production process for potassium sulfate co-production of melamine, which solves the problem of high energy consumption and high cost of ammonia and carbon dioxide produced in the production process of melamine in the existing production process through water washing, while potassium sulfate production During the process, the by-produced hydrochloric acid expands the library and the potassium sulfate unit is forced to reduce the load

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