Steam production system

The invention provides a steam production system which recycles heat of high-temperature and high-humidity process gas so as to overcome the defects in the prior art. The steam production system comprises a water supply pipe, a two-phase-change heat exchanger, a main steam pipe, an injection gas pipe, a high-temperature and high-humidity gas pipe, a low-temperature and low-humidity gas pipe, a condensate pipe, an injection gas pipe, an injector, a steam pipe, a temperature lowering water pipe, a temperature lowering device, a steam outlet pipe and a blow off pipe. A steam collection box of the two-phase-change heat exchanger is connected with the suction opening of the injector. Vaporization pressure on the water side in the two-phase-change heat exchanger is controlled through low pressure generated by the injector. The two-phase-change heat exchanger comprises a water separation box, a lower pipe plate, a water vaporization pipe, a diversion plate and an upper pipe plate. The water separation box at the bot