As an important pillar of energy in China, coal mines often suffer from the phenomenon of air shaft exhaust during their production process, which not only affects the ventilation efficiency of mines, but also causes a large amount of energy waste. However, it is in this situation that the waste heat recovery and utilization technology of exhaust air has emerged, providing a green and efficient energy recovery approach for coal mines.

Waste heat recovery and utilization technology for exhaust air

Heat accumulator recovery technology: Heat accumulator is a commonly used technology for waste heat recovery from exhaust air, which transfers the heat energy from the exhaust air to the heat storage material and then releases the heat energy when needed to achieve heating or other purposes.

Heat pump recovery technology: Utilizing heat pump technology, heat is extracted from exhaust air and used for heating or other thermal energy needs after heating up, which is efficient and environmentally friendly.

Power generation and utilization technology: Transforming the heat energy from the exhaust wind into electrical energy for use by internal equipment in coal mines or external power grids, achieving sustainable energy utilization.

Benefit evaluation of waste heat recovery and utilization of exhaust air

Energy conservation: The thermal energy contained in exhaust air is often wasted, and through recycling, energy utilization efficiency can be improved and energy waste can be reduced.

Environmental protection: Waste air recycling technology can reduce greenhouse gases and pollutants emitted by coal mines, and has a certain purification effect on the environment.

Economic benefits: The recovery and utilization of waste heat from exhaust air can save energy expenses and improve economic benefits for coal mines. Especially through the utilization of power generation technology, the revenue from electricity sales can also be obtained.

Improvement of working environment: Through the technology of waste heat recovery and utilization of exhaust air, the temperature inside the mine can be improved, and the comfort and work efficiency of operators can be improved.

The waste heat recovery and utilization technology of coal mine ventilation shafts, as an innovative approach to energy recovery, not only solves the problem of energy waste, but also provides strong support for the sustainable development of coal mines. Through technologies such as heat accumulators, heat pumps, and power generation, the waste heat of exhaust air can be converted into energy that can be used for various purposes, while also bringing positive impacts to the economic benefits, environmental protection, and operational environment improvement of coal mines. In the future development, the coal industry will further promote and apply the waste air and heat recovery technology to achieve the goal of green and sustainable energy utilization.