LSB series energy-saving boilers adopt section combustion technology and realize coal-gas transformation. In the coal gas generation chamber, the black smoke and other volatile components in coal transform into coal gas that can be clean burned, which eliminates conditions for black smoke generation. At the same time, the coke that has been removed fugitive constituent is pushed into the combustion chamber by mechanical drive devices for high temperature burning. This has not only overcome the drawback of small output of common gas boilers, but also gives play to the products’ pollution-free, environmental protection and ventilation advantages.