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A kind of air energy decompression membrane distillation device and distillation method

A technology of vacuum membrane distillation and membrane still, which is applied in the direction of chemical instruments and methods, total evaporation, membrane technology, etc., can solve the problems of membrane fouling, hydrophobicity, degradation, etc., achieve high mass transfer efficiency, reduce consumption, and occupy small area effect

Active Publication Date: 2021-09-28
JIANGNAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide an air energy decompression membrane distillation device, which can improve the problems of membrane fouling and hydrophobicity decline in the membrane distillation system

Method used

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  • A kind of air energy decompression membrane distillation device and distillation method
  • A kind of air energy decompression membrane distillation device and distillation method
  • A kind of air energy decompression membrane distillation device and distillation method

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Embodiment 1

[0022] An air energy decompression membrane distillation device includes an air source heat pump system and heat transfer equipment. In this embodiment, the heat transfer equipment is a membrane distillation device.

[0023] The air source heat pump system is used to realize energy acquisition and conversion, and convert the low-grade heat energy in the air into heat energy for heating wastewater after multi-layer conversion. The air source heat pump system includes an air heat exchanger 1. The air heat exchanger is placed near equipment that can generate hot air, such as an aeration pump, so that the heat in the air is transferred to the working medium in the air heat exchanger. After the working medium absorbs heat, it Gasification: In this embodiment, the working fluid is any one of the heat pump working fluids such as Freon 142b, R227ea, and R407C. The output end of the air heat exchanger 1 is connected to a gas-liquid separator 2, and the gas-liquid separator 2 is used to...

Embodiment 2

[0028] An air energy decompression membrane distillation method, comprising the steps of: the air heat exchanger 1 absorbs heat, the working medium in the air heat exchanger 1 is vaporized, and is input into the gas-liquid separator 2; the gas-liquid separator 2 converts the working medium gas Liquid separation, the low-temperature and low-pressure gas is input into the compressor 3, and the compressor 3 compresses the low-temperature and low-pressure gas into a high-temperature and high-pressure liquid; the liquid is input into the heat transfer tube bundle 4 of the membrane distiller, and the heat transfer tube bundle 4 receives the high temperature and high pressure output from the compressor 3 The liquid is heat-exchanged with the high-salt wastewater. At this time, the temperature of the working medium in the heat transfer tube bundle 4 is reduced to a low-temperature condensed liquid. The low-temperature condensed liquid is input into the drying filter 5 and dried, and the...

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Abstract

The purpose of the present invention is to provide an air energy decompression membrane distillation device and distillation method, which can improve the situation of membrane fouling and hydrophobicity decrease in the membrane distillation system. The technical solution includes: an air heat exchanger; a gas-liquid separator; a compressor; a heat transfer tube bundle; The permeate side of the flat hydrophobic membrane is equipped with a vacuum pump for reducing the air pressure; the working fluid is recycled in the system. In the present invention, the vaporization occurs at the interface between the downwardly flowing waste water and steam, the waste water does not directly contact the membrane, and the hydrophobic membrane does not need to be soaked in the filtrate for a long time, which reduces the speed of membrane fouling and hydrophobicity decline to the greatest extent.

Description

technical field [0001] The invention relates to an air energy decompression membrane distillation device and a distillation method, belonging to the technical field of water treatment equipment. Background technique [0002] Evaporation technology is the most widely used technology in the zero discharge treatment technology of high-salt organic wastewater. According to the process, it is divided into evaporation pond technology, membrane distillation crystallization technology, spray evaporation technology, and thermal evaporation technology. Among them, membrane distillation is an evaporation technology developed in the early 1980s. It is a new type of desalination technology combined with membrane technology and traditional evaporation technology. It is a membrane technology that uses hydrophobic microporous membranes to separate aqueous solutions containing non-volatile solutes. . Due to the surface tension of water, liquid water cannot pass through the micropores of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D61/36C02F1/44C02F1/04F24H4/02C02F103/06
CPCB01D61/364C02F1/04C02F1/447C02F2103/06F24H4/02
Inventor 邓芸孔小蝶陈逸凌李智慧施万胜吴文钰
Owner JIANGNAN UNIV
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