Gas inlet channel humidifying device for supercharged diesel engine

The invention aims to provide a gas inlet channel humidifying device for a supercharged diesel engine. The gas inlet channel humidifying device comprises a control water tank, a steam generator, a first turbine supercharger and a second turbine supercharger, wherein the steam generator is internally provided with a heating pipeline; waste gas enters a heating pipeline of the steam generator after passing through a first turbine; the heating pipeline is connected with a second turbine and the atmosphere respectively through a three-way solenoid valve; the second turbine is communicated with the atmosphere; the control water tank is connected with the steam generator and injects water into the steam generator; a venturi pipe is mounted on a gas inlet pipe between the first gas compressor and a diesel engine air cylinder; the water in the steam generator is heated by the waste gas in the heating pipeline to generate steam; the steam enters the venturi pipe after passing through a second gas compressor and then is sprayed into the gas inlet pipe. According to the gas inlet channel humidifying device for the supercharged diesel engine, the supercharged inlet gas and the supercharged water steam of the diesel engine are mixed in the gas inlet pipe so as to realize water doping and combustion; the utilization rate of resources is improved and the emission of NOX of the diesel engine can also be greatly reduced.