Device system for efficient cobalt sulfate concentration and continuous crystallization

Abstract

The invention relates to a device system for efficient cobalt sulfate concentration and continuous crystallization. The device system provided by the invention comprises an evaporation heater (06), an evaporation separator (07), an OSLO vacuum crystallizer (17), a fine grain eliminating heater (16), a steam compressor (10), a condensate water preheater (03), a steam preheater (04), a centrifugal machine (20) and a pump. A stock solution enters the evaporation heater through the preheater, and the heater is connected with the separator and the circulating pump; the separator is connected with the OSLO vacuum crystallizer; a material liquid drop device is arranged in the middle of the OSLO vacuum crystallizer, a flash chamber is arranged at the top of a pipe, a circulating liquid outlet is formed in the side part, a secondary steam outlet is formed in the top of the flash chamber and is connected with a condenser and a fine grain eliminator, the crystallizer is connected with the centrifugal machine, and the centrifugal machine is connected with a mother liquid tank and a stock solution buffer tank to realize overall material liquid circulation. The system has the characteristics of energy conservation, continuity, automation and high efficiency, and obtained products are large in grain size and high in quality.

Description

technical field [0001] The invention relates to a device system for high-efficiency concentration and continuous crystallization of cobalt sulfate, specifically an energy-saving continuous concentrator and continuous crystallizer, that is, a combined system with mechanical vapor recompression concentration and vacuum cooling crystallization process. Background technique [0002] Evaporation, concentration and crystallization production of cobalt sulfate and materials similar to cobalt sulfate is a production process with high energy consumption. How to save energy and produce efficiently for the above production process is the key to the development of the metallurgical industry. The traditional cobalt sulfate production process basically adopts single-effect or multi-effect evaporation in the first stage, and a jacketed reactor is used in the second stage to cool down and crystallize. Generally, the latter stage is intermittent production. This makes it impossible to carry ...

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Problems solved by technology

This makes it impossible to carry out continuous production in the production interval, making the evaporation and crystallization process inefficient, the crystallization process production capacity small, and the labor intensity high, which cannot meet the needs of modern production.

In addition, in the traditional single-effect or multi-effect evaporation evaporation process, the material temperature difference is large, the evaporator structure and scarring are serious, and frequent parking and cleaning are required, which seriously affects production efficiency.

Moreover, the traditional concentration equipment usually discharges the secondary steam and condensed water generated by the evaporator directly or after being condensed by the condensing equipment, which not only wastes the latent heat of the secondary steam and the waste heat of the condensed water, but also wastes energy. Condensing equipment is also added to condense secondary steam and condensed water, which wastes energy, increases investment and is not environmentally friendly and economical

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