Abstract: The main body of the invention part “A” is surrounded with a duct agitating device which Is secured to part “A”. The part “A” has one end sized to fit the ordinary household Vacuum sweeper. The other end is secured with a permanent or removable cap. The cap Is to limit the vacuum action to be focused to the plurality of openings along the length of part “A”. Part “B” is fitted on to part “A” and secured.

Abstract: A process is provided for the catalytic enrichment of a gas having a low BTU level and which has been derived from the gasification of coal and which has been scrubbed for removal of impurities and for the partial removal of carbon dioxide. The process involves the catalytic methanation of hydrogen and carbon oxides over a highly active catalyst in multiple stages to produce methane and steam. The cold scrubbed feed gas is brought up to reaction temperature by heat exchange with recycled product gas from the first stage of methanation, which in admixture with said feed gas acts additionally to modify the composition of said feed gas to bring it outside of the carbon forming range at the outlet of the reactor and to supply steam to said feed gas to prevent carbon deposition on to the catalyst and to absorb the heat of reaction. The enriched product gas after removal of water is interchangeable with natural gas and is of pipeline quality.