| 摘要 |
The invention relates to methods and devices for drying gases and can be used in the petrochemical, chemical, metallurgical and other branches of industry for drying process gases and air. Proposed is a device for drying gases, comprising a gas separator, adsorbers, a heating unit, a device for circulating purge gas and feeding regeneration gas into the gas to be dried, pipelines for the gas to be dried, dried gas, purge gas, and regeneration gas, and also a shut-off and control valve, wherein the gas to be dried is introduced radially into the adsorbers and the adsorbent is positioned between inner heat-exchanging surfaces, said surfaces being of the radial spiral variety, a catalytic air heater is used as the heater, and a vortex-type ejector is used as the device for circulating purge gas and feeding regeneration gas into the gas to be dried. Also proposed is a method of operation for a device for drying gases, comprising separating condensed moisture and mechanical impurities from the gas to be dried, adsorbing water vapors, regenerating the adsorbent at an increased temperature using purging with dried gas, separating off condensate and feeding regeneration gas into the flow of gas to be dried, and also cooling the regenerated adsorbent to the adsorbtion temperature, in which method a composite-type adsorbent is used, the adsorbtion of the water vapors is done while the adsorbent is simultaneously indirectly cooled with a cooling agent, regeneration is achieved by means of indirectly heating the adsorbent to the regeneration temperature using a heat transfer medium and subsequently using the dried gas to expel the water vapors from the free space of the adsorber, said dried gas being introduced in a direct flow in a quantity ranging from 5 to 10 times the volume of an adsorber, moreover, the regeneration gas is introduced into the flow of gas to be dried with the help of the vortex-type ejector using the gas to be dried as a working medium, condensate is separated from a mix of regeneration gas and gas to be dried, and the regenerated adsorbent is cooled to the adsorbtion temperature by means of indirect cooling using a cooling agent. Additionally, the cooling agent used is atmospheric air, and the heat transfer medium used is atmospheric air, heated with the help of the catalytic air heater by means of directly mixing hydrocarbon fuel oxidation products with said atmospheric air. The technical result, achieved in implementing the invention, consists in simplifying the device, decreasing the amount of materials used therein, increasing the fire explosion safety thereof, decreasing the energy consumption of the gas drying process and decreasing the amount of harmful substances and greenhouse gases emitted into the atmosphere. |
