FIELD: power engineering.
SUBSTANCE: device to concentrate combustible gas comprises an absorption column filled with an adsorbent for combustible gas adsorption; a supply facility to supply untreated gas, containing air and combustible gas, into the absorption column via the supply line during discharge of flue gas contained in the untreated gas and not adsorbed with the adsorbent, from the adsorption column via a discharge line. A collection facility to reduce pressure in the absorption column below atmospheric pressure and desorption of combustible gas, absorbed by the adsorbent, and to remove combustible gas via the line for collection; and a control facility for serial performance of the combustible gas absorption stage, at which the untreated gas is supplied into the absorption column, and the flue gas is released from the absorption column with a supply facility, and stages of combustible gas desorption, at which combustible gas is extracted, desorbed by the collection facility.
EFFECT: invention provides for concentrating of combustible gases up to high concentration with prevention of explosive concentration.
16 cl, 14 dwg
