Pretreatment purification device for helium-containing natural gas

The invention discloses a helium-containing natural gas pretreatment purification device which comprises a support, a tank body bracket is arranged at the lower end of the support, a through hole of the tank body bracket is connected with a vertically-arranged gas storage tank in a sleeved mode, a gas inlet connecting pipe is arranged at the lower end of the gas storage tank, and the gas inlet connecting pipe is connected with the gas outlet end of a gas compressor. The gas storage tank is divided into an inner tank and an outer tank, an electromagnetic valve is arranged on the inner tank, and an annular sleeve is sleeved with the outer tank. Compared with the prior art, the pretreatment and purification device for the helium-containing natural gas has the following advantages that gas does work through heat insulation throttling, internal energy in the gas is converted into mechanical energy, then temperature reduction is achieved, and the purpose of purifying the helium-containing natural gas is achieved; t