Integrated gas-type pearlite expansion apparatus based on spiral tube heat exchange

The invention discloses an integrated gas-type pearlite expansion apparatus based on spiral tube heat exchange, comprising an expander body, a spiral heat exchange line, a natural gas delivery line, an air delivery line and a gas burner. The expander body is provided with a hearth; the spiral heat exchange line is arranged in the hearth; the gas burner includes a gas mixing cavity and a gas nozzle; the gas delivery line and the spiral heat exchange line are communicated with the gas mixing cavity respectively through a natural gas inlet and an air inlet; an incoming gas tube of the gas nozzleis communicated with ta mixed gas outlet; the flow discharge end of a blower is connected with a gas inlet of the air delivery line; a gas outlet of the air delivery line is communicated with the spiral heat exchange line. High-temperature hot air can be mixed well quickly in the gas mixing cavity; instant mixing heating of natural gas is achieved to form high-temperature mixed fuel gas, the gas burner can ignite high-tem