Heat Recovery Heat Exchangers for Landfill Gas Collection and Recovery Facilities

Heat Recovery Heat Exchangers for Landfill Gas Collection and Recovery Facilities

Principle of Heat Recovery Heat Exchangers for Landfill Gas Collection and Recycling Facilities

Landfill gas is produced during the landfill process and is mainly composed of methane and carbon dioxide, with small amounts of nitrogen, oxygen, hydrogen sulphide, etc. These gases are produced during the decomposition of the waste and the temperature increases. These gases are produced during the decomposition of the waste and the temperature is increased. Heat recovery heat exchangers can utilise the heat from the landfill gas. As the hot landfill gas passes through the heat exchanger, the heat is transferred to the medium on the other side, usually water or air. For example, in a shell and tube heat exchanger, landfill gas flows in the tube pass and cold water flows in the shell pass. Heat is transferred from the gas to the cold water, raising the temperature of the cold water and lowering the temperature of the landfill gas.

For energy recovery, the recovered heat can be used for a variety of purposes. In the case of heated water, this hot water can be used for cleaning some of the facilities at the landfill, or for heating the surrounding buildings, for example.

Advantages of heat recovery heat exchangers in landfill gas collection and recycling facilities

Energy Recovery: Effective utilisation of heat from landfill gas reduces energy wastage. This goes a long way towards increasing the energy self-sufficiency of the landfill as a whole. For example, if the recovered heat can be used to heat buildings, dependence on conventional energy sources (e.g. natural gas, electricity, etc.) can be reduced.

Environmental benefits: In addition to recovering heat, heat recovery heat exchangers can also pre-treat landfill gas to some extent. By lowering the temperature of the gas, some of the impurities (e.g. water vapour) can be condensed and precipitated out, thus improving the quality of the landfill gas and facilitating subsequent treatment processes such as methane extraction. Methane is an important greenhouse gas. Increasing its recovery rate and utilising it can reduce the harm to the environment caused by the direct emission of methane into the atmosphere.

Economic benefits: The recovered heat can be converted into real economic benefits. For example, heated water can be used for commercial purposes or to reduce the cost of other energy purchases, while pre-treated landfill gas can also increase the economic income of a landfill site if it can be better utilised for other forms of energy recovery such as power generation.