Multifunctional multiple-effect automatic continuous evaporative crystallization technique and crystallization device

A technology of evaporation crystallization and multi-effect evaporator, which is applied in the field of multi-functional multi-effect automatic continuous evaporation crystallization process and crystallization equipment, can solve the problems of difficult control of crystallization temperature, increase of production cost, no utilization, etc., and reduce the labor cost of enterprises , reduce emissions, and reduce production costs

Inactive Publication Date: 2008-11-19
项公浩
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Problems solved by technology

Most of the equipment manufacturers use reactors to concentrate the materials, heat or cool the materials after reaching the required concentration, and crystallize when the materials meet the corresponding crystallization temperature, a

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  • Multifunctional multiple-effect automatic continuous evaporative crystallization technique and crystallization device
  • Multifunctional multiple-effect automatic continuous evaporative crystallization technique and crystallization device
  • Multifunctional multiple-effect automatic continuous evaporative crystallization technique and crystallization device

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Embodiment Construction

[0018] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0019] The total process of the present invention is as follows: unsaturated aqueous solution or organic solution (concentration is 5-20%) enters preheater under the action of vacuum pump and after preheating, enters first-effect evaporator and enters second-effect evaporator after reaching certain concentration, in After continuous evaporation in the second-effect evaporator to reach a certain concentration, it enters the three-effect evaporator, and then enters the four-effect and five-effect evaporators in turn. The temperature of each effect evaporator gradually decreases, and the vacuum degree gradually increases; when the material concentration reaches saturation Enter the crystallizer for flash crystallization. After crystallization, the thick slurry is pumped to the centrifuge for solid-liquid separation. The evaporated water o...

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Abstract

The invention relates to an evaporative crystallization process, in particular to the multifunctional multi-effect automatic continuous evaporative crystallization process and a crystallization device. The process preheats unsaturated water solution or organic solution of materials and carries out the continuous evaporation to the material liquid by a multi-effect evaporator, the temperature of the multi-effect evaporator is gradually reduced and the vacuum degree is gradually increased; when the concentration of the material liquid achieves the saturation, the material liquid enters a crystallizer for the flash evaporation crystallization, and products after the crystallization are subjected to the solid-liquid separation in a centrifuge; the unsaturated solution after the centrifugalization is sent back to the device for the further evaporation crystallization, and the evaporated water or the organic solvent is recycled for use after cooling, thereby realizing the continuous production. The evaporative crystallization process can greatly reduce the labor use and improve the productivity, thereby directly bringing economic benefits to enterprises which use the device and simultaneously reducing the national energy consumption.

Description

technical field [0001] The invention relates to an evaporation crystallization process, in particular to a multifunctional and multi-effect automatic continuous evaporation crystallization process and crystallization equipment, which can be widely used in the treatment and recovery of waste in various chemical materials sewage, continuous evaporation crystallization of chemical materials, and solvent extraction. Recycling, environmental sewage treatment, industrial wastewater treatment, seawater desalination treatment, etc. Background technique [0002] In the existing evaporative crystallization process, the evaporator and the crystallizer are operated separately in production, which consumes a lot of energy for equipment operation and increases labor force for equipment operation. Most of the equipment manufacturers use reactors to concentrate the materials, then heat or cool the materials after reaching the required concentration, and crystallize at the corresponding crys...

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Application Information

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IPC IPC(8): B01D9/02B01D1/26
Inventor 姜新明项公浩项公文
Owner 项公浩
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