Compressed natural gas feeder utilizing vortex tube to reduce pressure and heat up

A compressed natural gas feeder utilizing a vortex tube to reduce pressure and heat up comprises a compressed natural gas inlet, a high-pressure spherical valve, an automatic isolating valve, a pressure reducing and heating device, a spherical valve and a compressed natural gas outlet which are connected in series through a pipeline; the device is also provided with a pressure sensor, a safety valve and a pressure gauge; and the pressure reducing and heating device consists of a heat exchanger and a vortex tube which are connected in series. The pressure of the compressed natural gas is reduced through the vortex tube, and part of hot gas passes through the pipeline, flows back to the heat exchanger through an adjusting valve, indirectly preheats the pre-depressurization compressed natural gas, is mixed with another part of the depressurized airflow of the vortex tube, and is led to the compressed natural gas outlet. The utility model has the following advantages: the adoption of the skid mounted structure and the integration of the heating, pressure reducing and pressure regulating of the compressed natural gas ensure a compact structure and a small volume; and particularly, external heat source is not needed, the vortex tube can be utilized to output cold and hot gas, and a hot port is adopted, so that stronger adaptability and convenient and flexile use are ensured for users.