Temperature control system and method for crystallization kettle

Abstract

The invention discloses a temperature control system and method for a crystallization kettle, and the system comprises a medium pipe, wherein the interior of the medium pipe is provided with a fluid medium; medium control equipment which is connected with the medium pipe and the crystallization kettle, and controls the temperature of the fluid through controlling the input quantity of the fluid medium and / or the type of fluid medium input, wherein the medium control equipment controls the temperature of the crystallization kettle through temperature control fluid; gas control equipment which is used for outputting instrument air to the medium control equipment; and electrical control equipment which is connected with the medium control equipment and the crystallization kettle, and is usedfor sensing the temperature of the fluid medium, temperature control fluid, the medium control equipment and a material in the crystallization kettle and controlling the input quantity of the fluid medium of the medium control equipment and the type of the fluid medium input. The advantages and beneficial effects of the invention lie in that the system improves the control precision, achieves theprecise control of the material in the crystallization kettle, guarantees the stability of the temperature control of the crystallization kettle, and controls the crystallization technology in a better way.

Description

technical field [0001] The invention relates to the field of temperature control, in particular to a crystallization tank temperature control system and control method. Background technique [0002] In the existing temperature control of the crystallization tank, the temperature inside the crystallization tank is mostly controlled by controlling the amount of cold source and heat source entering the interlayer, so as to achieve the purpose of controlling the crystallization process. Although intelligent control schemes such as PLC or DCS are currently used, this method has the following shortcomings: [0003] 1. Due to the relatively large heat exchange area of ​​the crystallization kettle, there is a temperature difference on the heat exchange surface, which may easily cause uneven heating or cooling of the material. In actual production, the method of increasing stirring is used to avoid, which in turn causes the phenomenon of destroying the formation of crystals, which b...

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Problems solved by technology

[0004] 2. Due to the need for heat exchange between the material in the crystallization kettle and the jacket, there is a large time difference between the temperature of the material in the crystallization kettle and the cold and heat source in the jacket. It takes time for the temperature of the material to change

The temperature control of materials is easy to produce overshoot phenomenon, which is easy to cause quality decline for the one-way control process of crystallization kettle

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