Positive osmosis membrane module for slowing down external concentration polarization and membrane pollution

Abstract

The invention discloses a positive osmosis membrane component for slowing down external concentration polarization and membrane pollution. A positive osmosis membrane divides a permeation device bodyinto a raw material liquid side corridor and a suction liquid side corridor, the connecting part of the positive osmosis membrane and the permeation device body is sealed by a sealing ring; and impellers are arranged in the raw material liquid side corridor and the suction liquid side corridor. The raw material liquid side corridor is provided with a raw material liquid side water inlet and a rawmaterial liquid side water outlet. The suction liquid side corridor is provided with a suction liquid side water outlet and a suction liquid side water inlet. A raw material liquid enters the raw material liquid side corridor through the raw material liquid side water inlet, flows out from the raw material liquid side water outlet, drives the impeller to rotate in the flow process, a suction liquid flows out from the suction liquid side water outlet, and drives the impeller to rotate in the flow process, the liquid flow state is changed, and the liquid mixing speed is accelerated. The positiveosmosis membrane component has the beneficial effects that the rotation of the impellers changes the fluid flow state, thereby slowing down the polarization phenomenon of the external concentration difference, improving the membrane flux and reducing the membrane pollution.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering and relates to a forward osmosis membrane component. Background technique [0002] Water is the source of all things and an indispensable resource for the development of human society. Since the 21st century, the problem of water shortage has become increasingly prominent. At the Sustainable Development Summit held by the United Nations in Johannesburg in August 2002, the water crisis was listed as one of the serious challenges facing mankind in the next 10 years. As the current water environment pollution has further aggravated the problem of water resource shortage, sewage reuse and seawater desalination have become the fundamental ways to solve the water resource shortage. Forward osmosis is a new concentration-driven membrane separation technology. Compared with other traditional membrane processes, forward osmosis has the characteristics of high recovery rate, low energy co...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a forward osmosis membrane module that slows down external concentration polarization and membrane fouling, which solves the serious problem of concentration polarization in the forward osmosis process

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