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Super-hydrophobic nano-porous/micro-porous composite membranes for membrane distillation operating at low inlet feed temperatures with low energy consumption

A nanoporous, feeding temperature technology, applied in membrane distillation membrane, superhydrophobic nanoporous/microporous composite membrane field, can solve the problems of reducing the durability of MD membrane, insufficient design of MD membrane, etc.

Inactive Publication Date: 2020-08-04
沙特膜蒸馏脱盐有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] 2) Membrane wetting reduces the durability of MD membranes
In other words, these are the result of inadequate MD membrane design

Method used

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  • Super-hydrophobic nano-porous/micro-porous composite membranes for membrane distillation operating at low inlet feed temperatures with low energy consumption
  • Super-hydrophobic nano-porous/micro-porous composite membranes for membrane distillation operating at low inlet feed temperatures with low energy consumption
  • Super-hydrophobic nano-porous/micro-porous composite membranes for membrane distillation operating at low inlet feed temperatures with low energy consumption

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0114] Example 1: Parametric study of the proposed design

[0115] In the following examples, a detailed parametric study of the proposed nanoporous / microporous composite membrane design is explored in order to discuss the effect of different membrane parameters on its performance during the MD process. The modules used in this example were of the flat sheet type with dimensions 0.1 m x 0.05 m x 0.003 m (length x width x height).

[0116] The active layer of the membrane has a pore diameter of 1 nm, a porosity of 0.8, a tortuosity of 1.2, and a thickness of 1 μm. The pore size, porosity, tortuosity and thickness of the membrane support layer were 1 μm, 0.8, 1.2 and 50 μm, respectively. The thermal conductivity of film and air are 0.25W / m respectively 2 K and 0.026W / m 2 K.

[0117] Results and Discussion of Mathematical Model Output

[0118] The effect of modifying various physical parameters of the two film layers on the performance of composite films developed in acc...

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Abstract

A mathematical model was developed to lead to the design of a novel membrane, which can operate in membrane distillation at a small trans-membrane temperature gradient, including at low feed water temperature range. The novel membrane design can be described as a super-hydrophobic nano- porous / micro-porous composite membrane. This membrane will significantly decrease the energy requirements of theMD process since it can operate at very low inlet feed temperatures.

Description

[0001] field of invention [0002] The present invention relates to the field of membranes for membrane distillation. More specifically, the present invention relates to the field of superhydrophobic nanoporous / microporous composite membranes for different application scenarios. [0003] Background of the invention [0004] Membrane distillation (MD) is an emerging physical separation technique that has attracted attention in recent decades. MD is a thermally driven method in which a microporous membrane is used as the physical support to separate a warm solution from a cooled chamber containing a liquid or gas. Since the process is non-isothermal, vapor molecules migrate from the high vapor pressure membrane side (ie warm membrane side) to the low vapor pressure membrane side through the membrane pores. This can be determined according to different configurations, namely direct contact membrane distillation (DCMD); air gap membrane distillation (AGMD); swept gas membrane dis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D61/36B01D53/22B01D69/12
CPCB01D69/02B01D71/32B01D2325/38B01D61/3641B01D69/1216B01D2325/0283B01D69/10C02F1/447B01D69/1213B01D3/10B01D3/145B01D3/346B01D2325/04B01D2325/02831B01D2325/02832B01D2311/10
Inventor 穆罕默德·拉苏尔·齐泰沙特武石·松浦阿瑞里·阿尔萨贺瑞诺瑞迪娜·加弗俊吉尔·李
Owner 沙特膜蒸馏脱盐有限公司