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1947-48 Theatre Catalog, 6th Edition, Page 429 (415)

1947-48 Theatre Catalog, 6th Edition
1947-48 Theatre Catalog
1947-48 Theatre Catalog, 6th Edition, Page 429
Page 429


1947-48 Theatre Catalog, 6th Edition, Page 429

home, and apartment building heating market.

Whatever large scale success pulverized coal has been for fueling big electric generating stations, its record in residential and small commercial heating has provoked many skeptics. At least several concerted attempts to commercialize powdered coal for home heating have failed, essentially for three reasons: (1) The cost of pulverized coal in small quantities; (2) dirt from leaks in the system, and (3) the annoyance of fly-ash discharged on to surrounding areas. The new system claims to solve

. these.

The company will manufacture the heating equipment and prepare the powdered coal for retail distribution and use in this equipment. Initially the company will concentrate on installing and servicing commercial customers (as bakeries, theatres, dry cleaning, laundering, hotels, and so forth), that use steam boilers of 75 to 200 HP. This commercial business is expected to provide the new company with a profit-sustaining volume of several thousand tons of coal a year.

That done, the new business venture will seek the multi-family and individual home heating business, serving as a merchant of automatic home heating on an annual heating contract basis.

Tl-ll-I HEATMASTER UNIT is a sheet metal cylinder lined with refractory. Top mounting provides for vertical down-tiring atter ignition by a gas jet or sparkplug. A screw conveyor at the bottom of the air-tight hopper brings the powdered coal to the blower tor carburetion into the air stream

Under such contracts, the company will install and service the heating units.

The tank truck which delivers and fills the air-tight storage hopper by hose (as with fuel oil) will also take away the powdery ash. Heating temperature is regulated by the same thermostatic controls as for oil or gas burners. There is no shoveling nor janitor-type work. Waste gases will be vented off by exhaust pipe or up the chimney, making the operation virtually smokeless. The customer will pay for the installation and for his annual heating service, but not for maintenance and repairs.

As explained, instead of mechanical pulverization of the bituminous coal the new system will employ the central station air-operated ticoal atomizer" technique of such promise in the coal-fired gas turbine. The iiy ash will be eliminated by a number of Aerotec tubes, or small cyclone-type separators. The fiuify ash is deposited into an air-tight trap from which the delivery man sucks it out by vacuum cleaner. There is an air pre-heater for recovering waste heat to get higher eiiiciency.

Of house-size capacity, the unit (although the system is said to be adaptable to existing furnaces) is a vertical sheet metal cylinder lined with refractory. Top-mounting provides for vertical

entering the burner.

down-firing, after ignition by a gas pilot and sparkplug. A screw conveyor at the bottom of the air-tight hopper brings the powdered coal to the blower for carburetion into the air stream entering the burner. There is a small take-off line from the blower which gusts secondary air into the iiaming chamber to assist a more complete combustion.

As to competitive fuel economics, bituminous coal is not only abundantly available but it supplies heating energy at a lower cost than do fuel oils and gas, especially in the East. iiAtomizingt at a central station on a quantity scale should permit the company to sell the powdered coal in household lots on a low-cost basis. While the investment and installation cost of the heating system may look high, the customer does no manual shoveling, and the like, and pays nothing directly for maintenance and depreciation. The operating savings should pay for the heating system installation in three years or so, it is contended, while the householder gets clean, simple, smokeless and automatic heating.

As soon as practicable, it is the intention of the company to expand into areas other than Baltimore by establishing subsidiaries or by licensing others to manufacture and distribute equipment, fuel, or both.

There is a small take of! line from the blower which gusts secondary air into the naming chamber to assist a more complete combustion. As to economics. bituminous coal is not only more abundantly available, but it supplies heat energy at a; lower cost than oil and gas.







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1947-48 Theatre Catalog, 6th Edition, Page 429