Method for vacuum cooling of concentrated acid zinc sulfate
A technology of vacuum cooling and zinc sulfate, which is applied in the direction of zinc sulfate, heat exchange cooling crystallization, solution crystallization, etc., can solve the problems that cannot meet the large-scale zinc sulfate cooling demand, affect the normal production, crystallization blockage of the cooling tank, etc., and achieve shortening The effect of production cycle, improvement of crystal quality and reduction of production energy consumption
Inactive Publication Date: 2019-01-22
CHANGNING YANJIANG ZINC IND
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Problems solved by technology
However, the currently used cooling tank has low cooling efficiency and high energy consumption during production and use, and the cooling tank is prone to crystallization blockage, which affects the normal production
[0003] CN207498074U discloses a kind of cold liquid heat flushing method to produce the preparation device of zinc sulfate heptahydrate, comprising mother liquor storage tank, transfusion pump, transfusion tube, crystallization tank, cooling pipe, row crystal tube, centrifuge, above described mother liquor storage tank, set There is the infusion pump, the infusion pump is connected to the top of the crystallization tank through the infusion tube, the outer wall of the crystallization tank is provided with the cooling pipe, the cooling efficiency of the preparation device is low, the energy consumption is large, and it cannot meet the Cooling Requirements for Large Scale Zinc Sulphate
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[0032] The method for vacuum cooling concentrated acid zinc sulfate of the present invention includes the following steps:
[0033] The first step: Measure and compare the solution temperature of the first cooling tank and the second cooling tank, according to the temperature measured by the temperature sensor 12 on the first cooling tank 7 and the second cooling tank 8 (as attached Figure II The cooling device shown) or manual temperature measurement as in Example 1 (as attached Figure one The cooling device shown), determine which of the first cooling tank 7 and the second cooling tank 8 has a higher temperature of the zinc sulfate solution in the cooling tank as in Example 2. If the zinc sulfate solution in the first cooling tank 7 and the second cooling tank 8 If the temperature of the solution is higher than 60°C, the second step is implemented; if the temperature of the solution in the second cooling tank 8 is higher than 60°C and the temperature of the solution in the fir...
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The invention discloses a method for vacuum cooling of concentrated acid zinc sulfate. The method comprises the following steps: measuring and comparing the solution temperatures of a first cooling tank and a second cooling tank; carrying out vacuumizing evaporation and concentration on the cooling tank of which the solution temperature is higher than or equal to 60DEG C; controlling acoolant to pass through the coolant material inlet and the coolant material outlet of the cooling tank with a high solution temperature as well as the coolant material inlet and the coolant material outlet of thecooling tank with a low solution temperature in sequence to be cooled; after the solution temperature in one cooling tank achieves a set cooling temperature, emptying the solution in the cooling tank, and injecting a new solution to be cooled again; and repeating the above steps to cool again.
Description
Technical field [0001] The invention relates to a solution cooling method, in particular to a method for vacuum cooling concentrated acid zinc sulfate. Background technique [0002] Cooling and crystallization is a commonly used unit operation in chemical production, and it has an important process in chemical production practice. Cooling and crystallization is an important device in the cooling and crystallization system, which directly affects the quality and benefit of the products produced. However, in the production and use process of the currently used cooling tank, the cooling efficiency is low, the energy consumption is large, and the cooling tank is prone to crystallization blockage, which affects the normal production. [0003] CN207498074U discloses a preparation device for preparing zinc sulfate heptahydrate by a cold liquid hot flushing method, which comprises a mother liquid storage tank, an infusion pump, an infusion tube, a crystallization tank, a cooling tube, a cr...
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IPC IPC(8): B01D9/02C01G9/06
CPCB01D9/0004C01G9/06
Inventor 阳世伟
Owner CHANGNING YANJIANG ZINC IND