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A system and method for increasing the degree of concentration in a mechanical vapor recompression system

A mechanical vapor, recompression technology

Active Publication Date: 2021-06-22
成都民航六维航化有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The additional heat added to the system ensures the stable operation of the system, but the additional heat added by the traditional solution cannot improve the concentration of the material in the system in a stable state, and the heat is not fully and efficiently used

Method used

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  • A system and method for increasing the degree of concentration in a mechanical vapor recompression system

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Effect test

Embodiment 1

[0037] A system capable of improving the concentration degree of a mechanical vapor recompression system includes an evaporator 1, a compressor 2, a supplementary heater 4 and a discharge pump 7, and the outlet of the concentrated material at the bottom of the evaporator 1 is connected to the supplementary heater 4 are connected through pipelines; the vapor phase outlet at the upper part of the supplementary heater 4 is connected with the vapor phase inlet at the bottom of the evaporator 1 through pipelines; the evaporator 1 is connected with the inlet of the compressor 2 through pipelines, and the outlet of the compressor 2 is connected with the evaporator 1. The shell-side steam inlet is connected through a pipeline; the re-concentrated material outlet at the bottom of the supplementary heater 4 is connected with the discharge pump 7 through a pipeline. Heater 4 is connected, and all the way is connected with product storage tank 8 through pipeline as discharge.

[0038]Furt...

Embodiment 2

[0046] A method for improving the concentration degree of a mechanical vapor recompression system, the technical solution flow is as follows:

[0047] When the mechanical vapor recompression system needs supplementary heat from the outside because the heat dissipation loss is greater than the work done by the compressor 2, the concentrated material outlet at the bottom of the evaporator 1 is connected to the heat supplement 4, and the concentrated material in the evaporator 1 enters the heat supplement 4 After heating, it becomes a vapor-liquid two-phase; after the vapor-liquid two-phase separation, the vapor phase enters the evaporation system as the supplementary heat of the mechanical vapor recompression evaporation system, and enters the compressor 2 together with the secondary steam generated by the evaporator 1, After being compressed and heated up, it is used as the heat source of the evaporator 1; after being further heated and concentrated by the supplementary heater 4...

Embodiment 3

[0059] Attached below figure 1 , compare and illustrate the existing mechanical vapor recompression evaporation system heat supplement scheme and the new method proposed by the present invention:

[0060] The heat supplement method of the existing traditional mechanical vapor recompression system: when the heat dissipation loss of the mechanical vapor recompression system is greater than the work done by the vapor compressor 2, and the supplementary heat needs to be provided by the outside world, the steam inlet of the shell side of the compressor 2 and the evaporator 1 A steam branch pipe is set on the connected pipeline, which is used to input the supplementary steam from the outside into the 1 shell side of the evaporator to supplement the heat loss of the system and ensure the normal operation of the system.

[0061] figure 1 It is a schematic flowchart of a system and method proposed by the present invention that can increase the concentration degree of the mechanical va...

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Abstract

The invention relates to the fields of chemical industry and environmental protection, in particular to a system and method for improving the concentration degree of a mechanical vapor recompression system, including an evaporator, a compressor, a heat supplementary device and a discharge pump, and the concentrated material at the bottom of the evaporator is discharged The feed port is connected to the supplementary heater through pipelines; the vapor phase outlet on the upper part of the supplementary heater is connected to the vapor phase inlet at the bottom of the evaporator through pipelines; the evaporator is connected to the compressor inlet through pipelines, and the compressor outlet is connected to the evaporator shell steam inlet through pipelines Connection; the re-concentrated material outlet at the bottom of the supplementary heater is connected to the discharge pump through a pipeline, and the outlet of the discharge pump is divided into two routes: one is connected to the supplementary heater through a pipeline, and the other is connected to the product storage tank through a pipeline. In the system and method for improving the concentration degree of the mechanical vapor recompression system proposed by the present invention, the concentrated material after being concentrated by the mechanical vapor recompression system is also heat-exchanged with the supplementary heater before being discharged from the system. Compared with the traditional heat supplement scheme, it is 5~20% higher.

Description

technical field [0001] The invention relates to the fields of chemical industry and environmental protection, in particular to a system and method for improving the concentration degree of a mechanical vapor recompression system. Background technique [0002] Mechanical vapor recompression technology is an energy-saving technology widely used in chemical evaporation and concentration processes, such as salt concentration, organic matter recovery and concentration, seawater desalination and other fields. Its core is to convert the low-temperature and low-pressure steam generated during the evaporation process into high-temperature and high-pressure steam after mechanical compression, and then reuse it as a heat source. Mechanical vapor recompression technology not only recovers a large amount of latent heat in low-grade steam and saves energy, but also greatly reduces the cooling capacity required for condensation of low-temperature steam, reducing the operating cost of the e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D1/00B01D1/30
CPCB01D1/00B01D1/30
Inventor 张圆刘雪奇梅拥军周洪谢麟张同林吴斌
Owner 成都民航六维航化有限责任公司
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