Production process of spherical calcium chloride dihydrate

Abstract

The invention provides a spherical calcium chloride dihydrate production process. The production process comprises the following steps: 1) preparing seed crystals; 2) atomizing feed liquid; 3) performing rotary granulation; 4) performing fluidized drying; 5) screening and collecting. The problems that in the prior art, in a production process, crystals are prone to breakage, the yield is low, caking is prone to occurring in the production process, consequently, operation is unstable, and long-time continuous production cannot be achieved are effectively solved. According to the process, a fluidization air distribution plate is arranged in a rotary granulation device, granulation and drying processes are completed in the same equipment, particle fragmentation is effectively reduced, meanwhile, the drying and granulation processes are separately adjusted, caking is avoided, long-time continuous production can be guaranteed, the whole process is high in integration degree, and the production efficiency is greatly improved.

Description

technical field [0001] The invention relates to the technical field of calcium chloride production, in particular to a production process of spherical calcium chloride dihydrate. Background technique [0002] Calcium chloride is a very common industrial chemical, often used as a multi-purpose desiccant, refrigerant, building antifreeze, lubricating oil additive, etc. [0003] In the existing industrialized production, in order to obtain calcium chloride dihydrate with higher purity, the high tower granulation process and the spray air distribution plate granulation process are widely used at present. The high-tower granulation process is to send the calcium chloride feed liquid to the top of the granulation tower, and after atomization, it falls freely and cools down to precipitate calcium chloride dihydrate, and then sends it to the air distribution plate for drying. The heat of this process is not fully utilized, and the crystals are easily broken during the production pr...

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Problems solved by technology

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to solve the problem that the crystals in the production process of the prior art are easily broken, the yield is low and the operation is unstable due to easy agglomeration during the production process, and it cannot be continuously produced for a long time , to provide a production process of spherical calcium chloride dihydrate, through the installation of fluidized air distribution plate in the rotary granulation device, the granulation and drying process are completed in the same equipment, which effectively reduces the particle fragmentation; drying and granulation The process can be adjusted separately to avoid agglomeration, and the rotary granulation device has high operating flexibility, which can ensure continuous production for a long time

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