The article emphasizes on analyzing the chimney configuration of horizontal fast-assembly boiler and the reason for expansion leakage of chimney and how to treat and prevent it.

This paper has mainly introduced when using arch tube-plate and screw smoke-tube to reform the DZ-type horizontal packaged boiler. Good results of saving on energy has been got.

DZL horizontal automatic chain type coal-fired steam boiler for horizontal packaged water fire tube boiler, refrigerant natural circulation.