Hongtai Boiler is a horizontal quick-installed internal combustion three-pass fire tube steam boiler. It adopts a three-return structure with a wet furnace in the center. The high-temperature flue gas emitted by the burner sequentially flushes the second and third return smoke pipes, and is then discharged from the rear smoke chamber into the atmosphere through the chimney. The boiler is equipped with movable front and rear smoke box covers, making the boiler convenient for maintenance. The boiler is equipped with a technically good burner, which adopts advanced technologies such as automatic combustion adjustment, feed water automatic adjustment, program start and stop, and fully automatic operation. . This type of boiler has the characteristics of compact structure, safety, easy operation, rapid installation, less pollution, low noise and high efficiency.