Steam generator

The utility model discloses a steam generator which comprises an outer wall face and an inner wall face, a cavity is formed between the outer wall face and the inner wall face, and a water inlet pipe and a gas inlet pipe are arranged at the bottom of the cavity. The water inlet pipe is communicated with the water storage cavity, the fuel gas inlet pipe is communicated with the gas premixing chamber, and a first heating area, a first mixing chamber, a second heating area and a second mixing chamber are sequentially arranged at one end of the water storage cavity and one end of the gas premixing chamber; and one end of the second mixing chamber is communicated with the mixed gas outlet pipe. According to the utility model, the problems of high pressure drop loss and gas decomposition carbon deposition in the heating process of water/water vapor and gas can be solved, the heat exchange efficiency is ensured, and the controllability of the heat capacity of a heating area is improved. 本实用新型公开了一种蒸汽发生器，包括外壁面和内壁面，所述外