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Production and apparatus for producing methane from refuse embedded gas

A technology for producing methane from landfill gas is applied in the field of resource utilization of biogas, which can solve the problems of wasting energy, discharging landfill gas into the atmosphere, polluting the environment, etc., and achieves the effects of simple equipment, simple operation and less land occupation.

Active Publication Date: 2005-10-12
TSINGHUA UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that landfill gas is discharged into the atmosphere and pollute the environment while wasting a lot of energy. A new method for producing methane from LFG is proposed, and methane is produced by separating and purifying LFG to make LFG Become a renewable clean energy, and has the characteristics of simplicity and high efficiency

Method used

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  • Production and apparatus for producing methane from refuse embedded gas

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Embodiment Construction

[0023] The specific process of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0024] Embodiments of the method and equipment of the present invention are figure 1 As shown, wherein the solid line represents the feed gas, the dotted line represents the product gas, and the dotted line represents the tail gas. The equipment of the system used in this embodiment comprises:

[0025] 200m 3 The inlet of the / h suction pump is connected to the gas collection system of the landfill site, and the outlet is connected to the effective volume of 25m through a valve 3 The gas storage tank 2 is connected, and the outlet of the gas storage tank 2 is connected with the compressor 3 through a valve. The power of the compressor 3 is 500kW, which can compress the raw gas to 1MPa. It is directly connected with the filter 5, the filter is filled with natural quartz sand, the outlet of the filter is connected with the drying...

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Abstract

Production of methane from land-filled garbage gas and its apparatus are disclosed. It is carried out by pressing the abstracted land-filled garbage gas, freezing drying, multi-stage filtering, pretreatment process of adsorption drying, high-pressure adsorbing, co-current pressure equalizing, constant-pressure recovering, and pressure varied adsorption circulating. The apparatus consists of compressors connected orderly, freezing direr, filter, drying tower and pressure varied adsorption circulating system with 2-6 parallel adsorbing columns. Its advantages include simple apparatus and operation, low cost and good flexibility.

Description

technical field [0001] The invention belongs to the field of garbage treatment and renewable energy, and is characterized in that it relates to a resource utilization method of landfill gas and other biogas with similar components. technical background [0002] Landfill gas (Landfill Gas, LFG) contains 40-70% CH 4 With 30-50% CO 2 , its calorific value is about 4500~5500kcal / Nm 3 , That is, the energy produced by burning LFG per cubic meter is about equivalent to 0.45 liters of diesel or 0.6 liters of gasoline, so it is a clean fuel with high utilization value. There are about 22-36 million tons of CH from landfills in the world every year. 4 Exhausted into the atmosphere, polluting the environment while wasting a lot of renewable energy. Take China as an example. In 2000, the volume of urban waste removal in China reached 130 million tons. The statistical data of the past 20 years show that the amount of urban waste in China is increasing at a rate of 8-10% per year, an...

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Application Information

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IPC IPC(8): B09B3/00C07C7/12C07C9/04
Inventor 王伟韩飞毕志清万晓王治军罗钰翔
Owner TSINGHUA UNIV
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