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Cobaltous sulfate evaporative crystallization equipment and process

A technology of evaporative crystallization and cobalt sulfate, applied in the direction of cobalt sulfate, solution crystallization, crystallization device general layout, etc., can solve the problems of high equipment investment cost, steam consumption, low production efficiency, etc., and reduce energy consumption, energy consumption, etc. The effect of low consumption and simple process steps

Inactive Publication Date: 2018-09-25
SHENZHEN SUNEVAP TECH
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  • Claims
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AI Technical Summary

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

Method used

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  • Cobaltous sulfate evaporative crystallization equipment and process

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Effect test

Embodiment 1

[0027] The present embodiment provides a kind of cobalt sulfate evaporation crystallization equipment, is a kind of equipment that utilizes MVR technology to directly make cobalt sulfate solution heptahydrate cobalt sulfate crystal, described equipment such as figure 1 As shown, it includes the stock solution preheating system, evaporation concentration system, cooling crystallization system and filtration separation system connected in sequence, and also includes the control signal connection with the stock solution preheating system, evaporation concentration system, cooling crystallization system and filtration separation system mechanism, the control mechanism is PLC, and the control mechanism is used to control the automatic processing process of the raw liquid preheating system, evaporation concentration system, cooling crystallization system and filtration separation system, and all input and output signals can be controlled by a computer equipped with PLC control softwar...

Embodiment 2

[0033] This embodiment provides a process for evaporative crystallization using the cobalt sulfate evaporative crystallization equipment described in Example 1, which includes the following steps:

[0034]S1. Stock solution preheating, the cobalt sulfate solution is heated up to the evaporation temperature through the stock solution preheating system, and the cobalt sulfate stock solution stored in the stock solution storage tank 1 is sequentially pumped into the distilled water preheater 2 and the fresh steam preheater 3 by the stock solution pump 4 , heat exchange with the distilled water and fresh steam in each preheater in turn to reach the evaporation temperature of the cobalt sulfate solution of 93 ° C, the distilled water is the secondary steam condensed water obtained by evaporation of the distilled water in the distilled water storage tank 6, the described Fresh steam is saturated steam with a pressure of 0.1MpaG and a temperature of 120°C.

[0035] S2, evaporation an...

experiment example

[0039] The processing capacity situation and the running energy consumption situation of the cobalt acid evaporation crystallization equipment described in Test Example 1, the results are as shown in Table 1:

[0040] Table 1

[0041] serial number

[0042] The above test results show that the evaporation and crystallization equipment described in Example 1 has the advantages of low energy consumption, high output, simple process, small number of equipment, and low construction investment.

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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...

Claims

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Application Information

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IPC IPC(8): B01D9/02C01G51/10
CPCB01D9/0059C01G51/10
Inventor 鲍燕娟张小江周齐
Owner SHENZHEN SUNEVAP TECH
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