Double-Drum Bulk Steam Boiler

Technical parameters: 1) Specification: SHL35-1.6-AII bulk water pipe steam boiler 2) Rated evaporation: 35MT/h3) Rated working pressure: 1.6MPa 4) Steam temperature: saturation 204oC5) Feeding water temperature: 150oC 6) Feeding water pressure: 1. 73MPa7) Boiler efficiency: 81.14% 8) Exhaust smoke temperature: 165oC9) Original soot concentration: 1,838.46mg/m3 10) Designed fuel: grade II bituminous coal 11) Fuel consumption: 5.3MT/h12) Grate area: 32.4m213) Hearth capacity: 136.6m314) Boiler cooling-wall heat exchange area: 130.7m2 15) Convection tube bundle heat exchange area: 388m2 16) Air pre-heater heat exchange area: 640m2 17) Coal economizer heat exchange area: 255m218) Hot air temperature: 145oC 19) Boiler burned gas: 75,220m3/h20) Boiler air: 45,375 m3/h 21) Air resistance: 1,956Pa22) Burned gas resistance: 723Pa 23) Boiler-wall surface temperature: oC 24) Dimensions: 12.48 x 9.4 x 12.53m 25) Boiler net weight: 182MT (wall not included)26) Noise: 79dBSHL35-1.6-AII steam boiler is the double-drum horizontal laid natural cycle boiler, which is supported by steel-frame. The burning equipment is coal feeder and squama chain-grate. This boiler can be used as large centralized steam boiler of heat supplying station and heat-load peak adjusting set of heat and power station.Features: 1) This model is with double-drum horizontal laid structure. When thefeeding water enters the coal economizer, it enters in the steamdrum. The layout of the heating area is of enough margins. The front,back, and side walls form enough circulation height, thus the watercirculation is safe and reliable 2) The boiler drum with large steam space consists of underwaterorifice plate, even gas orifice plate and corrugated plate separator inaddition to water feeding and cleaning devices. Then the salt meltedin the steam can be transferred to the fed water through qualityexchange, thus the steam quality can be greatly enhanced3) The front water-cooling wall and the back water-cooling wall formthe front and back arch respectively. The front and back arch ismade of fire-proof materials to reduce the surface heat absorptioncapacity to form high temperature area for strong radiation. Withignition, there are strong high-temperature vortex cavities underthe front arch. The burning is strong under the back arch, so thatthe coal adaptability can be greatly enhanced4) Non-coal-leakage squama chain grate is adopted. The mainadvantages include little coal leakage and even draught, easy toclear up the coal ash. The chain withstanding the pull of the grateis under the chain-grate late and does not touch the fire bed directly,thus, the operation becomes even more reliable. As the boiler chainand the chain grate are in soft structure, making the manufacturingprecision and the installation requirements of the axle shaft chainwheel relatively low. The boiler chain can be adjusted automaticallyto reduce Paya accidents. The chain grate can be installed andunloaded conveniently, making the examination and reparationeasier. The chain grate can be replaced on the condition ofnon-stop boiler. It is with good dust cleaning performance. Thecontainer installed on two sides of the chain-grate is playing therole of water-cooling iron with very reliable anti-retarding functionfor the hearth