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Multi-effect plate type rising film countercurrent evaporation concentration device and method thereof

An evaporation concentration and evaporation device technology, which is applied in the field of multi-effect plate type rising film countercurrent evaporation concentration device, can solve the problems of easy crystallization and precipitation of heat-sensitive substances, and achieve the effect of avoiding the possibility of surface scaling and reducing energy consumption

Active Publication Date: 2012-06-27
SHANGHAI DISEN ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the phenomenon that crystallization is easy to occur when heat-sensitive substances are concentrated in the prior art, and to provide a multi-effect plate type rising film countercurrent evaporation concentration device and method

Method used

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  • Multi-effect plate type rising film countercurrent evaporation concentration device and method thereof
  • Multi-effect plate type rising film countercurrent evaporation concentration device and method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Concentration of sodium gluconate stock solution: when the mother liquor generated by the oxidation method enters the fifth effect of the unit, the temperature is 45 degrees Celsius, the Baume degree is 16, the absolute vacuum pressure of the fifth effect unit is 0.0123MPa, and the evaporation temperature is 50 degrees Celsius; after evaporation and dehydration, it enters the fourth effect The temperature of the mother liquor in the evaporation unit is 50 degrees Celsius, the Baume degree is increased to about 18-19, the vacuum absolute pressure of the fourth effect unit is 0.018 MPa, and the evaporation temperature is 57 degrees Celsius; after evaporation and dehydration, the temperature of the mother liquor is 57 degrees Celsius when entering the third effect evaporation unit , the Baume degree is increased to about 21, the absolute vacuum pressure of the third effect unit is 0.024MPa, and the evaporation temperature is 64 degrees Celsius; after evaporation and dehydrat...

Embodiment 2

[0037]Concentration of gluconolactone stock solution: when the mother liquor produced by the fermentation method enters the unit, the original concentration is about 17%, and the temperature is about 30-35 degrees Celsius. After being heated by a series-connected plate condenser and condensate heat exchanger, the temperature rises to about 40 degrees Celsius. Entering the fifth effect, the absolute vacuum pressure of the fifth effect unit is controlled at 0.01MPa, and the evaporation temperature is 46 degrees Celsius. The temperature is 53 degrees Celsius; after evaporation and dehydration, the mother liquor temperature is 53 degrees Celsius when entering the third effect evaporation unit, the absolute vacuum pressure of the third effect unit is 0.02MPa, and the evaporation temperature is 60 degrees Celsius; after evaporation and dehydration, the mother liquor temperature when entering the second effect evaporation unit is 60 degrees Celsius, the absolute vacuum pressure of the...

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Abstract

The present invention relates to the technical fields of a multi-effect evaporation concentration process and equipment, and specifically to a multi-effect plate type rising film countercurrent evaporation concentration device and a method thereof. The device comprises a plate type heat exchanger structure and a flash evaporation tank structure. The device is characterized in that the device comprises five groups of plate type rising film countercurrent evaporation devices, wherein the five groups of the plate type rising film countercurrent evaporation devices form a series connection; each group of the plate type rising film countercurrent evaporation device comprises a plate type heat exchanger, a flash evaporation tank, and a pump; each group of the plate type rising film countercurrent evaporation device is in the sealed negative pressure system condition; the pressure inside each group of the device is increased along with the increase of the raw material liquid concentration. The raw materials are subjected to heat exchange through the plate type heat exchanger, and then are separated from the solvent through the flash evaporation separator. The heat exchange treatments are sequentially performed until the material enters the fifth group of the flash evaporation tank. The heat-exchanged steam and the steam discharged from the outlet of the fifth group of the flash evaporation tank are introduced into the outlet pipe. With the present invention, the heat energy of the secondary steam after separation is completely utilized; the reverse heat exchange of the heat exchanger and the designed negative pressure and temperature condition limit the generation of the vaporization phenomenon of the material liquid in the heating process so as to reduce the scaling possibility.

Description

[technical field] [0001] The invention relates to the technical field of multi-effect evaporation concentration technology and equipment, in particular to a multi-effect plate type rising film countercurrent evaporation concentration device and method. [Background technique] [0002] At present, shell-and-tube heat exchangers or plate heat exchangers are generally used in the evaporation and concentration process. Due to their large size, the shell-and-tube heat exchangers require two or more operating platforms from a dozen meters to tens of meters in height; in many Restricted aspects: such as material properties, process conditions, etc. Therefore, most shell-and-tube heat exchangers can only achieve three-effect design, and the heat exchange efficiency is too low, so they are gradually replaced by plate heat exchangers. [0003] Domestic patent CN1864783A discloses a multi-effect evaporation, desalination and concentration method and device, which is the closest domesti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D1/26
Inventor 周轶松周鼎
Owner SHANGHAI DISEN ENERGY TECH
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