MVR crystallization salification grain control system and control method

A control system and crystallization technology, applied in solution crystallization, evaporation separation crystallization, crystallization condition screening, etc., can solve the problems of increased friction of heating tubes, inability to screen grain size range, large supersaturation, etc., and achieve quality assurance Effect

Pending Publication Date: 2019-03-19
JIANGSU RUISHENGHUA ENERGY TECH CO LTD
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

This will lead to excessive supersaturation, exceeding the limit of the metastable zone, resulting in excessive generation of crystal nuclei, resulting in increased friction between crystal grains and circulating pumps, heating pipes and circulating pipe walls, and mor

Method used

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  • MVR crystallization salification grain control system and control method
  • MVR crystallization salification grain control system and control method
  • MVR crystallization salification grain control system and control method

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Embodiment Construction

[0029] Specific embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0030] Such as Figure 1 to Figure 6 As shown, it is a MVR crystallization salt grain control system of this embodiment, a forced circulation pump 21, a crystallizer discharge pump 22, an elutriation circulation pump 23, a control system and a forced circulation heat exchanger 1. Heat inlet 2, heat exchange outlet 3, steam inlet 4, and condensed water outlet 5; Oslo crystallizer 6, including evaporation chamber 7 and crystallization chamber 8 arranged from top to bottom, and the bottom of evaporation chamber 7 is provided with settling tube 9, settling Pipe 9 extends to the bottom of crystallization chamber 8, and the bottom of evaporation chamber 7 is positioned at the top of settling tube 9 and is provided with circulating liquid inlet 10, and the top of evaporation chamber 7 is provided with secondary steam outlet 11, and the side wall of crystalliza...

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Abstract

The invention provides an MVR crystallization salification grain control system and a control method. The system comprises a forced circulation pump, a crystallizer discharging pump, an elutriation circulating pump, a control system, a forced circulation heat exchanger, an Oslo crystallizer and an elutriation separator, wherein a circulating liquid outlet is connected with a heat exchange inlet, aheat exchange outlet is connected with a circulating liquid inlet, a crystallization material liquid outlet is connected with a crystallization material liquid inlet through the crystallizer discharging pump, an elutriation clear liquid outlet is connected with a elutriation clear liquid inlet, a mother solution outlet is further connected to a connecting pipeline of a circulating liquid outlet and the forced circulation pump and is connected with a mother solution inlet through the elutriation circulating pump, and the control system is connected with the forced circulation pump, the crystallizer discharging pump and the elutriation circulating pump, respectively. The crystallizer is of an Oslo structure, the elutriation separator is additionally arranged, and the grains are primarily screened in the crystallizer and are further elutriated and screened by virtue of the elutriation separator, so that the quality of the product is guaranteed.

Description

technical field [0001] The invention relates to the technical field of chemical equipment, in particular to an MVR crystallization salt grain control system and a control method. Background technique [0002] Crystallization refers to the process in which a solute is automatically precipitated from a supersaturated solution to form a crystal. The crystallization process depends on the solubility of the crystalline substance. When a solution contains a solute content that exceeds the solubility, it is called a supersaturated solution, and supersaturation is the main driving force for the crystallization process. [0003] The main process of crystallization is the nucleation and growth of crystal nuclei, which are the core of crystal growth. The source of crystal nuclei is formed from the supersaturated solution. We call this nucleation process primary nucleation. The formation of primary nucleation is the tiny crystal particles newly generated from a higher supersaturated so...

Claims

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Application Information

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IPC IPC(8): B01D9/02
CPCB01D9/0077B01D9/0018
Inventor 李敏马恩禄张小江夏协兵
Owner JIANGSU RUISHENGHUA ENERGY TECH CO LTD
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