초록 ▼

A low energy consumption apparatus and method for treating a gas in which a main gas stream is cooled and heat is transferred by convection to a liquid and a secondary gas stream across a heat transfer surface. Liquid bearing the heat evaporates into the secondary stream. A total gas stream is subje

A low energy consumption apparatus and method for treating a gas in which a main gas stream is cooled and heat is transferred by convection to a liquid and a secondary gas stream across a heat transfer surface. Liquid bearing the heat evaporates into the secondary stream. A total gas stream is subjected to initial cooling along a moisture impervious surface of a heat exchange element to cause dry or sensible cooling. A secondary gas stream is diverted from the total discharge from the dry cooling stage and is directed counterflow to the total stream at the opposite surface of the heat exchange element which is an absorbent surface to cause heating and humidification of the secondary stream. The remaining cooled stream which is the primary stream is subjected to sorbent treatment to heat and dehumidify the same by flowing it through an absorbent media. The primary gas flow is then subjected to a final heat exchange treatment stage similar to the initial heat exchange treatment. Condensate may be removed from the saturated or near-saturated secondary flow. The primary flow may also be subjected to intermediate cooling treatment. A portion of the initial and final dry cooling stages preferably include an adiabatic cooling zone. The secondary flow from the initial heat exchanger may be subdivided into two streams. One secondary sub-stream is dehumidified in the sorbtion device by an auxiliary heater and is used for regeneration of the absorbent media.

대표청구항 ▼

A process for treating a total stream of gas to condition the same comprising: (a) treating the total gas stream in initial heat exchange zone by flowing the total gas along a first moisture-impervious surface to extract heat at substantially constant moisture conditions to produce a dry cooled gas

A process for treating a total stream of gas to condition the same comprising: (a) treating the total gas stream in initial heat exchange zone by flowing the total gas along a first moisture-impervious surface to extract heat at substantially constant moisture conditions to produce a dry cooled gas in a first stage; (b) diverting a portion of the total stream of dry cooled gas to establish a secondary gas flow and a primary gas flow; (c) directing the secondary gas flow in a secondary heat exchange zone counter-currently to the total gas stream along an absorbent surface adjacent said first moisture-impervious surface in heat exchange relationship with said total flow to heat and humidify said secondary gas flow; (d) directing the primary stream of dry cooled gas through a sorbent zone to heat and dehumidify same in a second stage treatment; (e) directing the heated dehumidified primary gas flow from said sorbent zone to a dry cooling chamber in a final heat exchange zone along a moisture impervious surface to extract heat therefrom to cause dry cooling at substantially constant moisture conditions to produce a dry cooled gas; and (f) diverting a portion of the gas exiting the final heat exchanger and directing it countercurrently to the flow in the cooling chamber of the final heat exchange stage in a secondary final stage wherein said flow is along an absorbent surface opposite said final exchanger impervious surface.