Sodium cyanide powder production system and sodium cyanide powder production method

Abstract

The invention discloses a sodium cyanide powder production system and a sodium cyanide powder production method. The production system comprises reactors, a reactor discharge pump, a reactor cooler, an evaporative crystallization system, a centrifugal separator, a flash drier, a cyclone separator and a molding packaging system; the production system is characterized in that the evaporative crystallization system comprises an evaporator, an evaporator condenser, an evaporator circulating pump, a crystallizer and an underflow pump; the reactors are arranged at a hydrocyanic acid inlet and a sodium hydroxide inlet; the reactors are communicated with the reactor cooler, an absorption segment at the upper part of the reactor and the evaporator through the reactor discharge pump separately; the reactor cooler is communicated with a mother liquor circulating inlet in the upper end of the reactor; the evaporator is communicated with the crystallizer; the crystallizer is communicated with the centrifugal separator through the underflow pump; the centrifugal separator is communicated with the flash drier; the flash drier is communicated with the cyclone separator; and the cyclone separator is communicated with the molding packaging system. The production system has the advantages that the structure is simple and reasonable, and safe, continuous and efficient industrial production of the sodium cyanide powder is ensured.

Description

technical field [0001] The invention relates to the field of sodium cyanide preparation, in particular to a sodium cyanide powder production system and production method. Background technique [0002] Sodium cyanide is widely used. Our sodium cyanide products are mainly used in the fields of refining of precious metals and rare metals, chemical synthesis, pesticides, medicine, electroplating industry, etc. There are two types of sodium cyanide products: solid and liquid. At present, the process methods for producing sodium cyanide products mainly include: sodium ammonia method, cyanide melt method, Angle method, methanol ammoxidation method, acrylonitrile by-product method and light oil cracking method, but the sodium ammonia method, cyanide melt method The law has been explicitly eliminated by the state. The process of producing sodium cyanide products using the acrylonitrile by-product method is roughly the same: after the hydrogen cyanide produced by the acrylonitrile pl...

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Problems solved by technology

[0003] However, because sodium cyanide will produce highly toxic and flammable hydrogen cyanide gas under the condition of being heated, exposed to air or in the presence of moisture, so that the sodium cyanide product will deteriorate, so the synthesis, evaporation, crystallization and separation of sodium cyanide products Processes such as drying and molding become difficult

However, the existing research on industrialized sodium cyanide production system is less, and the equipment structure in most production systems is more complicated, and the loss of sodium cyanide product is more

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