Because it shall be another new product of research and development, absorbing the advantages of SZL series coal-fired boiler and belonging to a type of heating equipment of mechanical coal supply, mechanical desiagging with the application of chain grate combustion, the JRL series hot blast boiler shall reduce the labor intensity of stokers. At the same time, the application of most refractory products masonry to the boiler resulted in long boiler life, steady combustion, as well as 80% thermal efficiency. The series product shall be used widely on chemical, food, and construction industry.