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A vacuum-aeration membrane distillation device and its application method

A vacuum membrane distillation and aeration membrane technology, applied in the field of membrane distillation, can solve the problems of affecting distillation efficiency, water vapor cannot be effectively used, and affecting membrane flux, etc., so as to increase evaporation area, shorten processing time, increase Effect of Large Membrane Flux

Active Publication Date: 2022-05-17
NORTHEAST DIANLI UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the membrane flux of the existing vacuum membrane distillation device is affected by membrane fouling, thereby affecting the distillation efficiency, and the water vapor separated by the gas-liquid separator cannot be effectively utilized, and provides a Vacuum-aeration membrane distillation device and its application method

Method used

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  • A vacuum-aeration membrane distillation device and its application method
  • A vacuum-aeration membrane distillation device and its application method

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specific Embodiment approach 1

[0016] Embodiment 1: In this embodiment, a vacuum-aeration membrane distillation device includes a vacuum membrane distillation unit and a steam compressor 6. Chamber 3, vacuum pump 4, gas-liquid separator 5 and liquid phase separation and collection device 7; the bottom of the raw material liquid chamber 1 is provided with a heating device, and a flat film 2 is arranged between the raw material liquid chamber 1 and the water vapor permeation chamber 3 , the outlet end of the water vapor transmission chamber 3 communicates with the inlet end of the vacuum pump 4 through the pipeline, the outlet end of the vacuum pump 4 communicates with the gas-liquid separator 5 through the pipeline, and the lower outlet of the gas-liquid separator 5 communicates with the liquid through the pipeline. The phase separation collection device 7 is connected, the upper outlet of the gas-liquid separator 5 is connected with the inlet end of the steam compressor 6 through a pipeline, and the pipeline...

specific Embodiment approach 2

[0018] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the liquid phase separation and collection device 7 is a water production tank.

[0019] Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0020] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that a flow meter is provided on the pipeline connected to the outlet end of the steam compressor 6 .

[0021] Other steps are the same as those in Embodiment 1 or 2.

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Abstract

A vacuum-aeration type membrane distillation device and its use method relate to the technical field of membrane distillation. The purpose of the present invention is to solve the problem that the membrane flux of the existing vacuum membrane distillation device is affected by membrane fouling, thereby affecting the distillation efficiency, and the water vapor separated by the gas-liquid separator cannot be effectively utilized. Method: The hot fluid generated by the evaporation of the liquid to be treated enters the water vapor permeation chamber through the flat film, and enters the gas-liquid separator under the suction of the vacuum pump to undergo a condensed phase change, and the condensed water produced is separated by gas-liquid separation. The lower outlet of the device enters the liquid phase separation and collection device, and the generated hot steam enters the steam compressor through the upper outlet of the gas-liquid separator to be compressed and heated up, and the hot steam after compression and temperature rise passes through the pipeline at the outlet end of the steam compressor Enter the bottom of the liquid to be treated in the raw material liquid chamber. The present invention can obtain a vacuum-aeration type membrane distillation device and its application method.

Description

technical field [0001] The invention relates to the technical field of membrane distillation, in particular to a vacuum-aeration membrane distillation device and a use method thereof. Background technique [0002] Water scarcity is a very serious problem at present. In my country, fresh water resources are about 2.8 trillion cubic meters, ranking sixth in the world. However, my country's per capita water resources are only 2,300 cubic meters, accounting for only a quarter of the world's average level. Therefore, the treatment of wastewater is particularly important. Among them, if the saline wastewater is not properly treated and discharged, the salt content exceeds the standard, which will cause irreparable losses to soil and groundwater. [0003] Membrane separation technology is a technology that appeared at the beginning of the 20th century and rose rapidly after the 1960s. Among them, membrane distillation technology is particularly prominent, and is gradually applie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D61/36B01D63/08B01D65/02C02F1/44
CPCB01D61/364B01D63/08B01D65/02C02F1/447Y02W10/37
Inventor 李正何广泽牛静东谭震南秀娜
Owner NORTHEAST DIANLI UNIVERSITY
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