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This low-concentration methane treatment technology developed by Shanxi Lu'an Mining (Group) Co., Ltd. and Beijing University of Chemical Technology has enabled the recovery and utilization of low-concentration methane from gas mines. The technology integrates the three components of preheating, reaction and heat recovery with high efficiency. Compared with traditional fixed-bed catalytic combustion technology, the new technology has the characteristics of simplified process and equipment, low investment and operating costs, mild reaction conditions, and low catalyst bed pressure drop.
The low-concentration methane flow shift catalytic oxidation and heating technology is mainly applied to the ventilation system of gas-type coal mines, low-cost removal of low-concentration methane in the ventilation gas and recovery of its energy as much as possible, so as to greatly reduce the methane emission. Coal mine ventilation gas is characterized by large amount of air, low methane concentration and frequent fluctuations, which cannot be operated by the traditional catalytic combustion technology. If the pressure is applied to the enrichment of methane by means of pressure swing adsorption or temperature swing adsorption, the energy consumed is far away. More than recover the chemical energy of methane, not worth the candle. Low-concentration methane flow shift catalytic oxidation and heating technology adopts a new honeycomb ceramic catalyst and heat storage material, and uses centrifuges to pump mine ventilation gas into the system. Under the condition of micro-negative pressure, low concentrations of methane in the ventilation gas economy Deal with. In a pilot study with a gas throughput of 1000 Nm3/h, the conversion of methane can reach more than 90%, and the recovered methane chemical energy can be used for heating or power generation.
An appraisal committee composed of renowned experts such as Academician Li Jinghai of the Chinese Academy of Sciences and Academician Fei Weiyang of Tsinghua University believes that this technology is an advanced technology applicable to ventilation gas treatment and low-grade energy recovery of gas mine coal mines. The design is safe and feasible, the control system is advanced, and it has obvious characteristics of integrated innovation. This technology has reached the international advanced level in general and has broad application prospects and promotion values. It is of great significance for energy conservation and emission reduction in China, developing a low-carbon economy, and responding to climate change.
The ability of the Chinese government to achieve the goal of controlling greenhouse gas emissions on the eve of the Copenhagen Climate Change Conference depends to a large extent on breakthroughs in emission reduction technologies. Just last week, a technology aimed at solving the problem of low concentration of methane emissions from mines with gas-type coal mines, low-concentration methane flow shifting catalytic oxidation and heating technology was identified in Beijing through the scientific and technological achievements organized by the China Petroleum and Chemical Industry Association.