Water generating method by utilizing separating membrane to enrich air water vapor and device thereof

Abstract

The invention discloses a water generating method by utilizing separating membrane to enrich air water vapor and device thereof. The water generating method includes that membrane dehumidification assembly and compression method are adopted to carry out air dehumidification treatment, then sweep gas is input into the water vapor side of the membrane dehumidification assembly by virtue of pipeline to realize enrichment of water vapor, and finally condensing is carried out on the high humidity sweep gas for enriching water vapor, thus obtaining water in liquid state or solid state. Compared with absorption method, the invention has the advantages of continuous operation process, no corrosion problem, easy maintenance and low energy consumption; the adopted refrigeration working medium is air, no pollution problem is produced, and compressor and expansion machine are all centrifugal machineries, rotating speed is high, thus equipment volume is small and weight is light under unit water production rate; and meanwhile the low temperature water vapor cooling medium at the outlet of the cold side passage of the main water generating device is led into the cold side passage of the secondary water generating device, so as to cool the air from atmosphere environment and obtain extra water yield.

Description

technical field [0001] The invention belongs to the technical field of dehumidification, and relates to a water production method and a device thereof, in particular to a method and a device for producing liquid water from air by using a separation membrane. Background technique [0002] When people work in arid areas, especially in desert areas for a long time, fresh water supply is a prerequisite for all activities in such areas. Generally, the way to obtain water is mainly to rely on a small amount of rainfall accumulation or replenishment from the base, so the amount of water obtained Unstable or expensive. In fact, the air contains a certain amount of water vapor. For example, the annual average relative humidity of the Sahara Desert is about 20-30%, and the humidity in the air at night is even greater. The steam is converted into liquid water, which can be used by people who work in arid areas for a long time, especially suitable for field research stations, border mi...

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Problems solved by technology

[0004]However, the regeneration process of the adsorbent is troublesome, and the regeneration process needs to consume a lot of heat energy, especially when the water vapor content in the air is low, to obtain a certain amount of water, A large amount of air needs to pass through the adsorbent, so the volume of the adsorption equipment is also very large, and in order to ensure the continuity of the water production process, each of the adsorption process and the regeneration process requires a set of equipment, and the two operate alternately, which undoubtedly further increases the equipment capacity. volume weight

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