A system for gas purification and energy utilization in landfills and its application method

Abstract

The invention relates to a system for garbage landfill gas purification and energy utilization and a use method thereof. A device consists of five systems: a gas-liquid separation system, an organic matter adsorption system, a methane enrichment utilization system, an organic matter thermal oxidation system and an automation control system. The gas-liquid separation system is composed of a gas washing chamber and a drying chamber; the organic matter adsorption system is composed of filtration chambers, Roots blowers and electric butterfly valves; the methane enrichment system is composed of infrared calorific value inductors and enrichment chambers; the organic matter thermal oxidation system is composed of the filtration chambers, a combustion chamber, an absorption chamber, a temperature inductor and a pulse igniter; an automation control terminal is connected with the infrared calorific value inductors, the temperature inductor, all the electric butterfly valves and all the Roots blowers. While solving the problem of garbage landfill odor pollution discharging, the system can make full use of energy of methane in discharged gas, so that a garbage landfill achieves energy self-sufficiency, dependence on external energy is reduced, and greenhouse gas discharging is reduced.

Description

technical field [0001] The invention relates to the field of gas purification in landfills, in particular to a system for gas purification and energy utilization in landfills and a method for using the same. Background technique [0002] With the rapid improvement of urbanization level and residents' living consumption level, the amount of urban domestic waste is increasing day by day. In 2011, my country's urban domestic waste was about 164 million tons, with an average annual growth rate of about 2%, while urban domestic waste exceeded 80%. Sanitary landfill, according to the current economic situation and the development trend of urban domestic waste in the future, for a long period of time, sanitary landfill will still be the main method of harmless disposal of domestic waste in our country. Although the landfill plays a good role in disposal as a "sink" of municipal solid waste, it also has an impact on the surrounding environment. On the one hand, landfill gas will acc...

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Problems solved by technology

However, these treatment and utilization methods and devices have disadvantages: 1) they cannot effectively deal with the foul smell and other polluting gases discharged from landfills; 2) combustion treatment, low energy utilization rate, and energy waste; Purchase, installation and operation all require large investment and high cost; 3) The production of landfill gas is unstable and the concentration is lower than the combustion value, which is difficult for power generation and use as fuel [2]

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