Cobaltous sulfate evaporative crystallization equipment and process

Abstract

The invention discloses cobaltous sulfate evaporative crystallization equipment. The cobaltous sulfate evaporative crystallization equipment comprises a stock solution preheating system, an evaporative concentration system, a cooling and crystallizing system and a filtering-separating system which are sequentially connected, and further comprises a control mechanism. The equipment automatically processes the cobaltous sulfate stock solution at each workshop stage of the stock solution preheating system, the evaporative concentration system, the cooling and crystallizing system and the filtering-separating system, is used for directly evaporating and crystallizing the cobaltous sulfate solution to prepare cobalt monosulfate heptahydrate, is production equipment with high degree of automation, is high in production efficiency, is simple in equipment structure, is small in floor space, is low in investment cost, is free of damage to environment, and is low-energy-consumption environment-friendly type production equipment. The invention further discloses an evaporative crystallization process, wherein the cobaltous sulfate solution is evaporated and concentrated after being pre-heated,is then cooled and crystallized to obtain a product, and the product is finally filtered and separated. The process is simple in step, is low in energy consumption, is low in production cost, and isan MVR evaporation technology in comparison with a conventional process, so that consumption of energy is further reduced.

Description

technical field [0001] The invention belongs to the technical field of cobalt sulfate production, and relates to a cobalt sulfate evaporative crystallization equipment and process, in particular to a cobalt sulfate evaporative crystallization equipment and process capable of directly obtaining cobalt sulfate heptahydrate products. Background technique [0002] Industrial cobalt sulfate (CoSO 4 ·7H 2 O) is a rose red crystal, red powder after dehydration, soluble in water and methanol, slightly soluble in ethanol, it is an important inorganic chemical product, widely used as stone powder, usually used in ceramic glazes and paint catalysts Dry agent can also be used in electroplating, alkaline batteries, production of cobalt-containing pigments and other cobalt products, catalysts, analytical reagents, feed additives and military high-tech drop tests, etc., and can also be used in petroleum ethylene cracking projects, hard Alloys and magnetic materials, etc. [0003] At pre...

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Problems solved by technology

[0003] At present, cobalt sulfate is usually prepared by the process of evaporation concentration-cooling crystallization. In the traditional evaporation crystallization process, the evaporation process is mostly carried out by single-effect or multi-effect evaporation. Among them, the secondary steam of single-effect evaporation or the last stage of multi-effect evaporation The steam can be directly transferred to the cooling water outside the system by the vacuum pump, which requires the construction of a cooling water circulation cooling system, and consumes steam to maintain the evaporation temperature. 0.8MPa steam needs to consume 0.8-1.2 tons of water, which has energy consumption and equipment. Problems of high input cost and low production efficiency

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