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GRATE AND FIREBARS
BQILER HOUSE INSTRUMENTS
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air grids air leakage air supply allowed amount of draught anthracite ash content ashpit banking bituminous coal black smoke boiler flue boiler house boiler plant brickwork British Thermal Unit burning coal burnt carbon monoxide cause central heating boilers chimney draught Clean the fires clinker closed COa content COKING STOKERS combustion draught gauge economiser efficiency excess air F1gure Figure firebed firebox firedoors fireman firing floor flow flue gas flue gases forced draught free-burning fresh coal furnace grit hand firing inch water gauge induced draught fan inleakage inlet instrument Lancashire boilers load Loss of carbon maintained measure Mechanical stokers natural draught necessary operation orifice plate output oxygen pass percentage pipe plate possible pressure primary air rake reduce removed resistance Rotary secondary air damper shovel side flue slice bar soot Sprinkler stokers Steam meters Table tube unburnt valve volatile matter waste water level Welsh smokeless coals