Ammonium chloride solution treatment system and ammonium chloride solution treatment method

Abstract

The invention relates to an ammonium chloride solution treatment system and an ammonium chloride solution treatment method. The ammonium chloride solution treatment system comprises a preheater, a falling film evaporator, a first separator, a forced circulation evaporator, a second separator, a cooling crystallizer, a centrifugal machine and a steam compressor. Falling film and forced circulationMVR evaporation is utilized; raw materials firstly enter the falling film evaporator to be concentrated to saturated primary decrement and then enter the forced circulation evaporator to be concentrated and crystallized, so that the amount of materials entering the forced circulation evaporator is reduced, and the circulation amount of the materials in equipment is reduced; thus, energy consumption is reduced, not only are the purposes of evaporation, concentration and crystallization achieved, but also high-efficiency and energy-saving effects are achieved.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to an ammonium chloride solution treatment system and an ammonium chloride solution treatment method. Background technique [0002] Ammonium chloride, referred to as ammonium chloride. It refers to the ammonium salt of hydrochloric acid, which is mostly a by-product of the alkali industry. Containing 24% to 26% nitrogen, it is a small white or slightly yellow square or octahedral crystal, available in powder and granular forms. Granular ammonium chloride is not easy to absorb moisture and is easy to store, while powdered ammonium chloride is mostly used as Basic fertilizer for compound fertilizer production. It is a physiologically acidic fertilizer. It is not suitable for application on acidic soil and saline-alkali soil because it contains more chlorine. ) on application. Ammonium chloride has high and stable fertilizer efficiency in rice fields, because C1 can not on...

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Problems solved by technology

[0004] Based on this, the purpose of the present invention is to provide a system for treating ammonium chloride solution, which solves the problem of long crystallization time and slow heat transfer in ammonium chloride solution in the prior art, resulting in poor crystal quality and high energy consumption. The problem is that by adopting falling film and forced circulation MVR evaporation, the material first enters the falling film evaporator to be concentrated to saturation primary reduction, and then enters the forced circulation evaporation to concentrate and crystallize, so that the amount of material entering the forced circulation evaporator is reduced, and the material in the equipment is reduced. in the cycle volume, thereby reducing energy consumption

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