Flow-adjustable natural gas pressurization system

The invention discloses a flow-adjustable natural gas pressurization system which comprises a pressurization unit, a pollution discharge unit, a discharge unit and a backflow unit, and the backflow unit comprises a silencer, a front pressure self-operated pressure regulating valve, a rear pressure self-operated pressure regulating valve, a manual stop valve, a pressure sensor and a plurality of pressure gauges. One end of the return pipe is connected to the gas conveying pipe between the one-way valve and the gas inlet buffer tank in a bypass mode, the other end of the return pipe sequentially passes through the silencer, the front-pressure self-operated pressure regulating valve, the rear-pressure self-operated pressure regulating valve and the manual stop valve and then is connected to an output pipeline leading to the natural gas engine in a bypass mode, and the return pipe is further connected with a pressure sensor and a pressure gauge in a bypass mode. The natural gas compressor is prevented from being