. Electric railway journal . es drier and a Quigley air-transport system. Raw coal is elevated to a 100-ton bin and is fe\l witha screw feeder to the drier, from whichit is elevated tothe dry-coal bins above each mill, into which the feedis by gravity. The pulverized fuel is dischargedthrough cyclone collectors above the roof of the buildinginto a pulverized-fuel bin over the transport tank. Thistank rests on a platform dial scale and can be chargedwith such amounts of fuel as desired, up to 10,000 pressure is then applied and any portion of fuel inthe tank can be transported to any one
. Electric railway journal . es drier and a Quigley air-transport system. Raw coal is elevated to a 100-ton bin and is fe\l witha screw feeder to the drier, from whichit is elevated tothe dry-coal bins above each mill, into which the feedis by gravity. The pulverized fuel is dischargedthrough cyclone collectors above the roof of the buildinginto a pulverized-fuel bin over the transport tank. Thistank rests on a platform dial scale and can be chargedwith such amounts of fuel as desired, up to 10,000 pressure is then applied and any portion of fuel inthe tank can be transported to any one of the coalbunkers in front of each boiler. By means of a signalsystem the boiler-room attendant can notify the millingplant when coal for any bin is required, and by adjust-ing the switch valve for the particular bin the amountof fuel required is automatically delivered. This equipment installation was completed by theQuigley Furnace Specialties Company in the latter partof 1920. As soon as the combustion chamber under one. View op Pulverized-Coal Milling Plant boiler was ready, this boiler was put into service andoperated for a short period, during which time somemodifications were made in the combustion chamber andthe burners were equipped with mixing vanes. On , 1920, the formal test was made, indicating full per-formance of the guarantees with the exception of theamount of combustible in the ash. However, as theeffect on the efficiency was negligible, the plant wasaccepted. These test data were limited to the conditions of theguarantee, which did not take into consideration theboiler efficiency, but were based on the specific per-formance of the furnace and were specified as follows: (a) Capacity of pulverized fuel plant. (b) Fineness of pulverized coal. (c) Capacity of feeders. (d) Percentage of unconsumed combustible in ash. (e) Percentage of CO* in products of combustion. (f) Abrasion or effect on refractories in combustionchamber. Further experimental operations
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