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Process and system for recovering water from the atmosphere

  • US 4,146,372 A
  • Filed: 03/28/1977
  • Issued: 03/27/1979
  • Est. Priority Date: 03/29/1976
  • Status: Expired due to Term
First Claim
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1. A process for recovering water from air, comprising the steps of passing night air at a relatively low first temperature of up to about 20°

  • C. first through a layer of a substantially non-adsorbing heat sink material of relatively high heat capacity so as to cool said non-adsorbing material to substantially said first temperature;

    thereafter passing the night air through a layer of coarsely granulated, shaped, moisture adsorbent material so as to adsorb the moisture content of the night air;

    passing ambient day-time air at a second temperature of from about 25°

    C. to about 70°

    C., which is sufficiently high to displace moisture from the adsorbing material, and at ambient pressure in reverse direction through the layer of adsorbent material having adsorbed thereon the moisture content of the night air, whereby the water adsorbed in the adsorbent layer is at least substantially removed therefrom by said ambient day-time air at ambient pressure;

    thereafter passing the moisture-containing day-time air through the layer of cooled, non-adsorbing material and condensing the water removed from the adsorbent layer on the cooled, non-adsorbent material; and

    recovering the condensed water from the non-adsorbent material.

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