METHOD AND DEVICE FOR NEUTRALISATION AND RECOVERY OF DOMESTIC WASTE LANDFILL BODY

摘要

FIELD: oil and gas industry.;SUBSTANCE: method for neutralisation and recovery of domestic waste landfill body includes drilling wells in the thickness of the landfill body and installing vertical perforated discharge pipes in them, solar heating and moistening of the landfill body, located under pyramidal transparent caps, atmospheric precipitations and feedwater from the grooves between the caps, anaerobic fermentation in the thickness of the landfill body with the production of bio-gas (methane), its withdrawal from the caps and pores of the landfill body via vertical perforated discharge pipes connected via gas pipelines to the compressor, which creates a vacuum in the cavity of the caps and gas pipelines connected to it on the suction durm and compresses the biogas at the outlet, which enters the tube space of the air cooler under pressure, cooled by external air due to natural draft, where it is cooled and significant portion of water vapouts and heavy hydrocarbons is condensed. Purified and cooled biogas, consisting mainly of CH₄, enters the gas collector, and the condensate, consisting of water and heavy hydrocarbons, is supplied to a storage tank. The device for neutralisation and recovery of domestic waste landfill body contains a section of the landfill body at the bottom of the waste dumping ground, drilled in the landfill body along the calculated N-well array, into which the vertical disposal perforated pipes are inserted, connected to the gas pipelines, N transparent sealed pyramidal caps with gaps between them are mounted above the wells along the horizon with width of Δ ₁ and immersion depth in thelandfill body of ∆₂, which form grooves. Each of the above mentioned caps is made of a framework formed by a lower square frame and an upper ring, interconnected by inclined ribs coated with a transparent sheath. In each cap, the disposal vertical perforated pipes are passed through the upper ring, the pipes reach the bottom of the ground by the lower end, their upper end is inserted into the inlet nozzle of an ordinary gas collector connected to a common gas collector, connected to the compressor located outside the ground boundary, the air tubular cooler and the gas collector via a suction gas pipeline. The grooves of the boundary caps are connected to the feed pump via a distributing gutter.;EFFECT: reduced costs, increased efficiency.;2 cl, 5 dwg