SZL water tube quickly installed (assembled) boiler has 2 vertical steam drums, and the innovative horizontal cyclone-fired combustion chamber, which could effectively enhance the thermal efficiency and reduce the flue gas emission concentration. The flue gas emission concentration is lower than 100 mm/nm3, the flue gas blackness is lower than Ringelmann level 1, which enables the boiler to be used in the first-class environment protected area. The boiler installs one cast iron economizer at its afterbody, the fire-gate applies the chamber-segregated ventilation structure, which is easy to adjust. The separate-layer coal supply device could be chosen according to the customer requirement. Advantages of such boiler are: strong power , high thermal efficiency , 110% override capability , compactly designed , small floor area . Customers appreciate its safely operated, investment conserved , and broadly fuel adapted capability most.