Disposal system for landfill gas or biogas

Abstract

The invention relates to a disposal system for landfill gas or biogas, which comprises a compressor, a desulfurizing tower, a freeze dryer and a transformation absorption device which are sequentially connected. A bottom outlet of the transformation absorption device is connected with an inlet of a methane synthesis device by a vacuum tank and a vacuum pump; a hydrogen outlet of a hydrogen production unit is connected with the inlet of the methane synthesis device; an outlet of the methane synthesis device is connected with a methane storage tank; a top outlet of the transformation absorption device is connected with the methane storage tank; an oxygen outlet of the hydrogen production unit is connected with an oxygen storage tank; a water storage tank is connected with an inlet of the hydrogen production unit; the outlet at the bottom of the methane synthesis device is connected with the inlet of the hydrogen production unit. The disposal system further comprises a solar collection device which is respectively connected with the methane synthesis device and the hydrogen production unit. The system is simple to operate, energy-saving and environmentally friendly, does not require H2 and O2 separation equipment, has methane selectivity of 100%, does not generate byproducts, and has a high solar conversation rate of 50%; methane and oxygen can be produced only by putting a small volume of water and a small quantity of electricity.

Description

technical field [0001] The invention relates to a landfill gas or biogas disposal system. Background technique [0002] The main component of landfill gas and biogas is CH 4 and CO 2 , CH 4 The contents are 35%~65% and 53%~70%, CO 2 The contents are respectively 15%-50% and 30%-47%. Due to CO 2 It will greatly reduce the calorific value of landfill gas and biogas. Generally, before using landfill gas and biogas as an energy source, CH should be separated 4 and CO 2 , the separated CO 2 Direct emissions not only cause the greenhouse effect, but are also a great waste. [0003] Using solar energy to convert CO 2 Converting to fuel has become a huge energy challenge. It could close the man-made carbon cycle on a global scale and make energy renewable. Compared with the reactions of other alcohols or hydrocarbons, CO 2 The reaction speed of methanation is very fast, which has obvious advantages in reaction thermodynamics. [0004] CO 2 The hydrogen required for the...

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Problems solved by technology

Therefore, the gas obtained from the reaction is mixed with CO and unreacted CO 2 , need to invest a lot of money in the follow-up for separation and purification

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