According to the user's requirements, a single or multiple sets of single-stage gas generators and associated purification equipment forms a hot gas station. General hot gas stations include single-stage gas generators, furnace ash buckets, cyclone dust collectors, water seal tanks, bell valves, water seal shut-off valves, gas blowers (inverter), air check valves, etc. (see Flow chart). Anthracite or bituminous coal can be. The gas is suitable for conventional burners and regenerative burners are not suitable.