... 1.coal-fired hot water boiler 2.Heating capacity:1.4-21t/h 3.Pressure:0.7-1.25MPa SZL packaged water-tube steam ... the double-cylinder,water-tube assembly,chain grate boiler.Two cylinders are laid at the upper and lower level of boiler ... spaxe,single-floor boiler room,cost-effective omfrastructure.Great assembily level,short installation period and cheap installation.Sufficient and reasonable heating ...