FIELD: environment protection.
SUBSTANCE: invention relates to environmental protection and can be used to produce biogas during the neutralization and disposal of urban and industrial waste of organic origin due to solar energy and atmospheric precipitation. The method for obtaining biogas from an array of household waste includes drilling wells in the thickness of the array and installing vertical perforated discharge pipes in them, solar heating and humidification of the array placed under pyramidal transparent caps, atmospheric precipitation and feed water from the grooves between the caps, anaerobic fermentation in the thickness of the array to produce biogas (methane), its withdrawal from caps and pores of the array through vertical perforated discharge pipes connected through gas pipelines to the compressor, which creates a vacuum in the cavity of the caps and gas pipelines connected to it at the suction and compresses the biogas at the outlet, which then enters under pressure into the pipe space of an air refrigerator cooled by outside air due to natural draft, where it cools with condensation of a significant part of water vapor and heavy hydrocarbons. Next, the biogas enters the adsorber, where it is cleaned from ballast and harmful impurities, for example, such as carbon dioxide and hydrogen sulfide, after which the gas, consisting mainly of CH4, enters the gas collector, and the condensate, consisting of water and heavy hydrocarbons, is sent to the storage tank. The device contains a section of the array on the base of the landfill, drilled in the array according to a calculated grid of N wells, over which N transparent sealed pyramidal caps are installed with gaps between them horizontally with a width of Δ1 and a depth of immersion in the array of Δ2, forming grooves connected to a distribution tray, and in each cap through discharge vertical perforated pipes are passed into the wells that reach the bottom end of the polygon base, connected to the ordinary gas collector with the upper end, connected to a common gas collector and a suction gas pipeline located outside the landfill: a compressor, an air tubular refrigerator, an adsorber, which consists of a vertical cylindrical housing with upper and lower covers, framed on the outside by annular water collectors, provided with inlet and outlet gas pipes on the side and top, a water fitting on the bottom, and inside the housing in a staggered order from top to bottom perforated baskets filled with granulated blast furnace slag are placed, sprinklers are placed above the baskets, connected by pipes with annular water collectors, while the inlet gas pipe is connected to a tubular refrigerator, the outlet gas pipe is connected to a gas collector, a water fitting with a distribution tray, which is connected, in turn, to a feed pump.
EFFECT: increasing the environmental efficiency of the method and device for obtaining biogas from an array of household waste.
2 cl, 2 dwg
