US398684A

US398684A - Smoke-consuming furnace and air-heater

Info

Publication number: US398684A
Authority: US
Publication date: 1889-02-26
Anticipated expiration: 1906-02-26

Description

(No Model.) 2 Sheets-Sheet l.,

P. W. WIESEBROOK. SMOKE GONSUMING FURNACE AND AIR EEATER.

No. 398,684. Patented Feb. 26, 1

jw/yezzio'r w miwzzmwam A! 7 W l/W P. W. WIESEBROGK. SMOKE UONSUMING FURNACE AND AIR HEATER.

I (No Model.) 2 SheetsSheet 2. k No. 398,684. Y Patented Feb. 26, 1889;

TTnn @TATES PATENT OFFICE.

FREDERICK ll. \VIESEHROCK, OF LONG ISLAND CITY, NFAY YORK.

SMOKE GONSUMlNG FURNACE AND AIR-HEATER.

SPECIFICATION forming part of Letters Patent No. 398,684, dated February 26, 1889.

Application filecllnly 1.9, 1887. Serial No. 244,742. Numodel-l T0 aZZ whom, it may concern.-

Be it known that I, FREDERICK W. \VIESE- BROOK, a citizen of thclfnited States, residing at Long Island City, in the county of Queens and State of New York, have invented new and useful Improvements in Smoke-Consuming Furnaces and Air-Heaters, of which the following is a specification.

In heating air for desiecating, metallurgical, and other purposes it has been the general p notice to pass the air over hot surfaces of metal or other material, which method is objectionable in that it demands costly apparatus and seldom utilizes fifty per cent. of the heat generated by the fuel consumed, and is only desirable for warn'iing buildings where the air must be in a condition suitable for respiration, or for drying materials which would be injuriously aliected by air mixed with the products of imperfect combustioncarbonic acid and hydrogen. It has also been proposed in this art to heat air by blowing or otherwise forcing it directly through the tire; but thismethod'involves a largeconsumption of fuel, in that an excessive quantity of air is forced through the tire and imperfect combustion is the result. This not only means a waste of fuel, but the air thus heated is impregnated with sulphurous and carbonic oxides to such an extent as to render it unsuitable for contact with articles of food.

The objects of my invention are to avoid the foregoing objections, to provide a novel air-heating furnace wherein more perfect combustion is obtained, and to purity and place large volumes of hot air in suitable condition to act upon articles of food fordesiceating the same or for metallurgical and other purposes. These objects I accmnplish by the features of construction and combiimtions of devices hereinafter described and claimed, reference being made to the accompanyin drawings, in which- Figure l is a longitudinal vertical section of a furnace and air-heater constructed according to my invention. Fig. 2 is a transverse vertical section t'alcen through the line Jr J' of Fig. l. Fig. 3 is a front elevation of the furnace. Fig. 'l' is a longitudinal section of one of the side walls of the furnace. Fig. 5 is a view, partly in section, of the furnace connected with a drying house or compartment.

l l l l The reference-nulneral l designatts a structure of masonry, brick, or iron work, comprising side and end walls, a floor, roof, tlues, the.

This structure constituting the body of my furnace and air-heater may be of any desired form and size.

v wall.

At the front of the furnace is arranged the fire-box 2, which has a grate, 3, and the usual charging-door, -;t. A door, 5, in the front f urnace-wall communicates with the ash-pit, and is provided with a register, (5, for regulating the admission of air to the space beneath the grate and fuel-bed. In rear of the [ire-box 2 isarraugedthereignitiou-chanr her 7, which is separated from the firebox by the bridge wall 8. Above the bridge-wall is arranged an arch-wall, 9, which forms the roof of the fire-box and the reignition-chamber. The britilge-wall 8 does not extend quite up to said arcl1wall, leaving a passage, 10, for conveying the products of combustion from the fire-box to the reignition-chamber. The rear wall of the latter has a series of descending or diving openings, 11, formed at" its bottom, which lead into a vertical flue, l2, communicating at its top with a chimney, 13, beneath said chimney with an upper longitudinal airtlue, 14., and at its bottom with another airflue, 15.

The air-fines ii and 15 extend the entire length of the furnace and open out through the front wall thereof, the upper flue terminating at said front wall and the lower one being carried to any desired pointas, for ex ample, that shown at 31 in Fig. 5where heated air is required in carrying out desiceating, metallurgical, or other operations.

I have in Fig. 1 shown the'lower flue broken off at the point where it may connect with a chamber, which, for the sake of distinction,

may be termed the laboratm'y. At the other side of the laboratory is arranged another fluc, which contains an exhaust-fan, 16, or other device for drawing the air from the furnace and air-heater through the laboratory. At the front of the upper flue, it, is arranged a slotted register, 30, which serves to regulate the volume of atmospheric air to be heated. The side walls of the furnace are provided with air-ducts 18,which follow a zigzag course and serve to conduct the air heated by the passage through said ducts into a transverse duct or passage, 19, formed in the bridge- A series of slots, 20, are providedat the top of the passage 19 for discharging the heated air into the reignition-chamber 7. The air-heating ducts in the side walls of the furnace open out through the front wall thereof, and are provided thereat with suitable dam pers or registers, 21. The chimney is provided with a suitable damper, 22, and another damper, 23, is arranged in the lower hot-air flue, 15.

The operation of a furnace or air-heating apparatus constructed in theabox'e-described manner is follows, viz: In starting the apparatus, the damper in the hot-air flue 15 is closed, and the damper 22 in the chimney is opened and the tire started in the fire-box. \Vhen the furnace becomes well heated,which can be ascertained through the peep-hole 28 in the wall, and when, after admitting air through the ducts in the side walls, a body of white flames is visible in the reigniti-onchamber 7, the damper in the chimney is closed and the damper in the hot-air fine 15 opened. At the same time the cold-air register 30 in the upper flue, 14, is also opened and the exhaust-fan set in motion. By the use of a pyrometer in the flue 15 the temperature of the air can be ascertained, and the desired degree of heat maintained by admitting more or less air through the register 80. \Vhat takes place in the heateritself may be described as follows, viz: The fire being started, the chimney is kept open and the lower flue, 15, closed, and air is admitted to the fire direct through the register in the ashpit door, while air heated by its passage through the zigzag channels in the side walls of the furnace issues through the slots in the bridge-wall and meets the products of combustion passing over said bridge-wall into the reignitionchamber. This air, passing through the channels in the side and bridge walls, becomes heated by taking up the heat from the walls, and the gases passin from the fire over the bridge-wall mingle with said heated air issuing through the slots in the bridgeqvall, and when the temperature of the air reaches from 600 to 7 00 Fahrenheit said gases are ignited again, thereby consuming the carbonic oxide. This will cause an increase of temperature and a final passing out through the slots in the rear wall of the reignitionchamber into the descending or diving flue in rear of said chamber of carbonic acid, hydrogen, and whatever oxygen may be left unconsumed, the bulk of the air being at the same time drawn in through the register 30 and passed over the arch-wall 9, thereby absorbing the heat from said wall, which meets at the discharge-slots in the rear wall of the reignition-chamber the hot products of combustion and becomes well .mixed with the same, and is then carried off through the flue 15 to the place of destination for drying, boiling, or heating purposes.

The temperature to which air maybe heated in the manner proposed by me varies according to the bulk of the air admitted, and temperatures can be maintained above 1,000 Fahrenheit, and for this reason my invention is especially adapted for metallurgical processes or for drying processes where large bodies of heated air are required.

Having thus described my invention, what I claim is 1. An air-heating furnace for desiccating and similar purposes, provided with a chimney, a fire-chamber, a rei gniting-ch amber having outlets in its rear wall, a bridge-wall located between the fire-chamber and the reignitin g-ch amber an d containing a channel open at its top to the latter, tortuous passages in the side walls open at the front to the external atmosphere and communicating at the rear with the channel in the bridge-wall, a descending or diving flue located in rear of the reigniting-chamber, and communicating with the rear outlet thereof and with the chimney, a horizontal fresh-air flue extending over the reigniting-chamber and communicating at the rear with the upper part of the diving-flue, and a horizontal flue at the base extending under 'the reigniting-chamber, and communicating at the rear with the lower part of the diving-flue for conveying the purified hot air therefrom, substantially as described.

2. An air-heating furnace for desiccating and similar purposes, provided with a chimney containing a damper, a fire-chamber, a reignition-chamber having outlets in its rear wall, a bridge-wall located between the tire chamber and reigniting-chamber and containing a channel open at its top to the lat ter, tortuous passages in the side walls open at the front to the external atmosphere, controlled by valves, and communicatiliig at the rear with the channel in the bridge-wall, an arch over the fire and reigniting chambers arranged to provide a passage above the bridge-wall, a descending or diving flue located at the rear of the reigniting-chamber, and communicating with the rear outlets thereof and with the chimney, a horizontal fresh-air flue extending above the arch, controlled at the front by a valve, and communicating at the rear with the upper part of the diving-flue at a point below the damper in the chimney, and a horizontal flue at the base containing a damper extending under the reigniting and fire chambers,'ar d communicating at the rear with the lower part of the diving-flue for conveying the purified hot air therefrom, substantially as described.

In testimony whereof I have affixed mysignature in presence of two witnesses.

FREDERICK IV. IES EBROCK.

Witnesses:

LEOPOLD ARNSTEIN, JOHN PETERS.