Smoke temperature regulation and control structure of gas-fired boiler

The utility model discloses a gas-fired boiler smoke temperature regulation and control structure which comprises a smoke channel, an air preheater is installed in the smoke channel and comprises a tube pass air channel and a shell pass smoke channel, the tube pass air channel is arranged in the shell pass smoke channel, and the shell pass smoke channel is arranged in the shell pass smoke channel. The lower portion of an inlet of the tube pass air channel is communicated with a front cold air channel of the air preheater, an outlet of the tube pass air channel is communicated with an outlet air box of the air preheater, and a temperature adjusting baffle is installed between the upper portion of the inlet of the tube pass air channel and the upper portion of the front cold air channel. On one hand, by means of the temperature adjusting baffle, the amount of air entering the upper portion of the tube pass air channel of the air preheater is reduced, so that the heat exchange amount of the upper tube pass, the