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Membrane distillation heat exchange device

A heat exchange device and membrane distillation technology, applied in heating water/sewage treatment, seawater treatment, general water supply saving, etc., can solve the problem of large volume of the evaporator, reduce the difficulty of sealing, reduce the cost, and reduce the difficulty of transportation, The effect of vacuum sealing area reduction

Pending Publication Date: 2022-01-11
HAINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies of the prior art, the present invention provides a membrane distillation heat exchange device, which solves the problem that the volume of the evaporator is too large

Method used

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  • Membrane distillation heat exchange device

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Effect test

Embodiment 1

[0040] Such as figure 1 As shown, the present invention provides a membrane distillation heat exchange device, which includes: an evaporation membrane module 10, a vacuum pump 20, a heat exchanger 30 and a fresh water storage tank 40;

[0041] The evaporation membrane module 10 includes: a feed liquid side 11, a hydrophobic gas permeable membrane 12 and a permeable vacuum side 13; the hydrophobic gas permeable membrane 12 is blocked between the feed liquid side 11 and the permeate vacuum side 13;

[0042] Hot seawater flows through the feed liquid side 11, the permeate vacuum side 13 communicates with the vacuum pump 20, the heat exchanger 30 is arranged between the permeate vacuum side 13 and the vacuum pump 20, and the fresh water storage tank 40 is arranged between the vacuum pump 20 and the heat exchanger Between 30.

[0043] The hot seawater flowing through the feed liquid side 11 is under the action of the vapor pressure difference, and the water vapor passes through th...

Embodiment 2

[0049] Such as figure 2 As shown, the hot seawater is surface hot seawater with a temperature of 25-28°C; the cooling medium is deep-layer cold seawater with a temperature of 4-6°C.

Embodiment 3

[0051] Such as image 3 As shown, the membrane distillation heat exchange device also includes: a constant temperature water tank 50, the hot seawater is surface seawater heated by geothermal water in the constant temperature water tank 50, and the temperature is 40-70°C; the cooling medium is surface seawater , the temperature is 25-28°C.

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Abstract

The invention provides a membrane distillation heat exchange device, and relates to the technical field of seawater desalination. The membrane distillation heat exchange device comprises an evaporation membrane assembly, a vacuum pump, a heat exchanger and a fresh water storage tank; the evaporation membrane assembly comprises a feed liquid side, a hydrophobic breathable membrane and a permeation vacuum side; the hydrophobic breathable film is blocked between the feed liquid side and the permeation vacuum side; and hot seawater flows through the feed liquid side, the permeation vacuum side communicates with the vacuum pump, the heat exchanger is arranged between the permeation vacuum side and the vacuum pump, and the fresh water storage tank is arranged between the vacuum pump and the heat exchanger. Compared with a traditional evaporator, the evaporator has the advantages that the volume reduction rate of the evaporator exceeds 90% in the same steam occurrence rate, so that the vacuum sealing area is effectively reduced, the sealing difficulty is reduced, and the cost and the transportation difficulty are greatly reduced.

Description

technical field [0001] The invention relates to the technical field of seawater desalination, in particular to a membrane distillation heat exchange device. Background technique [0002] It is particularly important to use the rich ocean advantages to develop marine energy utilization technologies suitable for the tropical environment of the South China Sea, and to provide power and water support for the development of the South China Sea. Common ocean energy includes tidal energy, tidal current energy, wave energy and thermal energy. Among these types of ocean energy, ocean temperature difference energy has the advantages of stable energy output and high energy density. The available temperature difference of ocean thermal energy is only about 20°C, and the conditions for thermal energy utilization are harsh. If it is only converted into electrical energy, the utilization efficiency is too low, so comprehensive utilization is the only way. [0003] The thermal cycle is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/08C02F103/08
CPCC02F1/08C02F2103/08Y02A20/124
Inventor 马庆芬刘学进卢辉
Owner HAINAN UNIVERSITY
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