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Crystallization system and crystallization process for producing nickel sulfate by continuous method

A crystallization system, nickel sulfate technology, applied in nickel sulfate, crystallization separation, solution crystallization, etc., can solve the problems of high energy consumption, low production efficiency, and many control process parameters.

Pending Publication Date: 2021-05-18
취저우화여우코발트뉴머터리얼컴퍼니리미티드 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has the following disadvantages in the process of producing nickel sulfate crystals: 1. Single-pot crystallization is adopted, and the control process parameters are many, and the uniformity of product batches is low; 2. The batch operation is completed, and the production efficiency is low; 3. The investment cost is high and occupies an area Large area; 4. Large energy consumption in the process of evaporation and concentration

Method used

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  • Crystallization system and crystallization process for producing nickel sulfate by continuous method
  • Crystallization system and crystallization process for producing nickel sulfate by continuous method
  • Crystallization system and crystallization process for producing nickel sulfate by continuous method

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Embodiment 1

[0024] like figure 1 , figure 2 Shown, the crystallization system of a kind of continuous method production nickel sulfate that present embodiment describes, it comprises crystallizer 1, fine crystal eliminator 2, feed pump 3, heat exchanger 4, discharge pump 5, thickener 6 and a centrifuge 7; the crystallizer includes an upper cylinder 15, a middle cylinder 9 and a lower cylinder 11, the upper cylinder is provided with a steam outlet 8, and the steam outlet is connected to a heat exchanger; The liquid external circulation outlet 10, a straight cylinder baffle 17 is arranged in the middle cylinder, and a variable diameter guide cylinder 16 is arranged inside the straight cylinder baffle. The variable diameter guide cylinder is composed of a straight cylinder and a variable diameter cylinder, and the height of the straight cylinder is 0.25 to 0.5 times the height of the cylinder, and the maximum diameter of the variable diameter cylinder is 1 to 2 times the minimum diameter o...

Embodiment 2

[0027] A kind of crystallization technique of continuous method production nickel sulfate, specifically comprises the steps:

[0028]The dilute nickel sulfate solution is concentrated to near saturation by means of multi-effect evaporation, and the specific gravity of the nearly saturated nickel sulfate solution is maintained at 1.495-1.525kg / m3, and then enters the crystallizer draft tube at a flow rate of 32-40m3 / h; Under the action of the nickel sulfate solution, the nickel sulfate solution moves upward in the guide tube, and moves downward outside the guide tube, and the nearly saturated nickel sulfate solution directly contacts with the nickel sulfate solution at a temperature of 40-50°C in the crystallizer for heat and mass transfer. In the crystallization process, the nickel sulfate clear liquid in the crystallizer enters the fine crystal eliminator through the outlet of the clear liquid outer circulation, and heat exchange is performed in the fine grain eliminator to he...

Embodiment 3

[0030] A kind of crystallization technique of continuous method production nickel sulfate, specifically comprises the steps:

[0031] The dilute nickel sulfate solution is concentrated to near saturation by means of multi-effect evaporation, and the specific gravity of the nearly saturated nickel sulfate solution is maintained at 1.455-1.485kg / m3, and then enters the crystallizer draft tube at a flow rate of 32-40m3 / h; Under the action of the nickel sulfate solution, the nickel sulfate solution moves upward in the guide tube, and moves downward outside the guide tube, and the nearly saturated nickel sulfate solution directly contacts with the nickel sulfate solution at a temperature of 55-65°C in the crystallizer for heat and mass transfer. In the crystallization process, the nickel sulfate clear liquid in the crystallizer enters the fine crystal eliminator through the outlet of the clear liquid outer circulation, and heat exchange is performed in the fine grain eliminator to h...

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Abstract

The invention belongs to the technical field of industrial production of sulfate, and particularly relates to a crystallization system and a crystallization process for producing nickel sulfate by a continuous method. The invention relates to a crystallization system for producing nickel sulfate through a continuous method. The crystallization system comprises a crystallizer, a fine grain eliminator, a feeding pump, a heat exchanger, a discharging pump, a thickener and a centrifugal machine. According to the crystallization system and the crystallization process for producing the nickel sulfate by the continuous method, uniform supersaturation degree of the nickel sulfate solution in each part of the crystallizer is ensured, so that a nickel sulfate product with uniform particle size distribution and the particle size of more than 800 microns is prepared. Compared with a traditional intermittent crystallization mode, the crystallization system adopts a continuous crystallization mode, and the production capacity is enhanced.

Description

technical field [0001] The invention belongs to the technical field of sulfate industrial production, in particular to a crystallization system and a crystallization process for continuous production of nickel sulfate. Background technique [0002] Nickel sulfate, as an important chemical raw material, has a wide range of uses in civil, construction, aerospace equipment, defense industry and other fields. It is specifically used in electroplating, electroless plating, aluminum coloring, battery materials and catalysts. [0003] The preparation of nickel sulfate is generally concentrated from a dilute solution to a certain specific gravity through single-effect evaporation or multi-effect evaporation, and then the nickel sulfate product is obtained by batch crystallization. In the batch crystallization operation, the nickel sulfate solution is usually added to the crystallization tank at one time, and then crystallization is carried out in a single tank by adjusting the cooli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D9/02B01D36/04C01G53/10
CPCB01D9/0022B01D9/0031B01D9/0063B01D36/045B01D2009/0086C01G53/10
Inventor 惠升李艳黄凯李小林鄢建忠江慧兵张佳伟
Owner 취저우화여우코발트뉴머터리얼컴퍼니리미티드
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