Energy-saving pollutionless gas boiler

The utility model belongs to the field of energy saving and environment protection, and is a boiler which changes coal into coal gas to be burned by a coal gas generating chamber. The utility model aims for solving the problems of the environmental protection and the energy-saving of the boiler. The utility model is characterized in that the utility model is composed of a coal gas generating chamber, a burning chamber, an explosion-proof door, a circumambient flue which is composed of a bend water pipe and a boiler shell, etc. A fire separating wall and a fire blocking wall are arranged in the circumambient flue. An igniting head and a boiler fire monitoring pipe are arranged on the lower part of the burning chamber, which accomplishes automatic igniting and fire extinction alarming. The environmental protection index of the utility model conforms to a class of areas prescribed by the state. Compared with an oil-burning boiler and taking a 1t/h boiler for example, and the utility model can save more than RMB 0.35 million fuel cost every year. Compared with a common coal-burning boiler, the utility model can save more than 20% coal.