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Vacuum-aeration type membrane distillation device and using method thereof

A vacuum membrane distillation and aerated membrane technology, applied in the field of membrane distillation, can solve the problems of affecting the distillation efficiency, affecting the membrane flux, and water vapor cannot be effectively utilized, so as to increase the evaporation area and increase the membrane flux. , the effect of shortening the processing time

Active Publication Date: 2020-09-11
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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  • Vacuum-aeration type membrane distillation device and using method thereof
  • Vacuum-aeration type membrane distillation device and using method thereof

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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

The invention discloses a vacuum-aeration type membrane distillation device and a using method thereof, and relates to the technical field of membrane distillation. The invention aims to solve the problems that the membrane flux of the existing vacuum membrane distillation device is influenced by membrane pollution, the distillation efficiency is further influenced, and water vapor separated by agas-liquid separator cannot be effectively utilized. The method comprises the following steps: hot fluid generated by evaporation of to-be-treated liquid enters the water vapor permeation chamber through the flat sheet membrane, then under the suction action of the vacuum pump, the gas enters the gas-liquid separator to be subjected to condensation phase change; the generated condensed water enters the liquid-phase separation and collection device through a lower outlet of the gas-liquid separator; generated hot steam enters the steam compressor through an upper outlet of the gas-liquid separator to be compressed and heated, and the compressed and heated hot steam enters the bottom of to-be-treated liquid in the raw material liquid chamber through a pipeline at the outlet end of the steamcompressor. The invention aims to provide the vacuum-aeration type membrane distillation device and the using method thereof.

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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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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