US1558493A - Air-heating apparatus - Google Patents

Description

Oct. 27, 9 x r I 1,558,493

. C. D. MOSHER AIR HEATING APPAR TUS Filed 1925 3 Sheets-Shet 1.

ENTOR ATTORNEY Oct. 27, 1925.

. C. D. MOSHER A R HEATING APPARATUS Filed Aug. 14, 192:: a Sheets-Sheet 5 ATTORNEY V i atcnted (lot. 2?, 1925. I

urn STATES. PATENT OFFICE.

CHARLES D. KOSHER, OF NEW YORK, N. Y.

AIR-HEATING Arimna'rus.

Application filed August 14, 1923. Serial No. 657,303.

To aZZ whom it may concern."

of the transfer of heat, from the outgoing hot gases and products of combustion from the fuel of a furnace to the incoming air for the combustion of said fuel.

To obtain the required results, an air heater is made up of removable air chambers with corrugated surfaces, that provide sinuous passages for air and gases that flow through the heater in opposite directions.

It is well known that a. gasfor air will flow along a straight or plane surface and closely adhere thereto, by virtue of which only a thin stratum ofthe air or gas is heated from any heat emanatin from the plane surface, the said stratum ormin an insulator of heat and permitting but llttle heat to be transmitted to the other strata of the mass of air. By means of corrugated plates, as employed in this apparatus,a zi zag flow of hot gases is obtainedon one si e of the plates and a zigza counter flow of air on the opposite sides 0% the plates.

The corrugated plates are contained in an air heater, in which hot gases flow in one direction on one side of the plates, and the air to be heated flows in the opposite direction on the opposite side of the plates.

The corrugated surfaces of the plates provide zigzag or sinuous passages which cause the air and hot gases to constantly change their direction of flow at each impingement on the surfaces of the plates. Both the air and hot gases as they leave the surface of one corrugation impinge against the surface of the nest corrugation in a direction making an. angle from its previous direction of )dow. u

By this means stratification isbroken up and ,the amount of heat transferred from The invention is founded on the principle the hot gases to the air is per unit of surface.

The organization of the invention comprises essentially an air heater with a casing enclosing kltac able air chambers or units adjacent to each other in a row and havin pfirrulgated side walls. Air flows through greatly increased bustion from the uel flow through the heater between the outer faces of the chambers in an opposite direction. Heat is thereby trans itted from the hot gases to the air through the walls of the air chambers.

In the accompanying drawings Fig. 1 represents a side elevation of the air heating a paratus connectedto a steam generating p antshown partly in section; Fig. 2 shows an enlarged front elevation of an air heater; Fig. 3 indicates a partial section of Fig. 2 on the line 3, 3; Fig. 4 represents a partial section of Fig. 2 on the line 4, 4; Fig. 5 shows a right hand side view and section on the line 5, f Fig. 2; Fig. 6 represents a fragmentary enlarged side elevation of a detac able chamber or unit; Fig. 7 shows a left hand side View of Fig. 6; Fig. 8 is a top plan view of Fig. 6 and Fig. 9 indicates an enlarged fragmentary portion of Fig; 4. "Referring to Fig. 1 a. partial longitudinal section of a steam generator is indicated in its entirety by the letter A, with thefilrnace 20, combustion chamber 21, tubes 22, ash pit 23 and the rear wall 25. A smoke stack 30 is connected to an opening in the Wall 25, by means of the gasconduit 31.

The air heater is indicated in its entirety by the letter B, and its upper end is con- Iiected to the conduit 31.

An air duct C having a. damper 32 connects the upper portion of the air heater B and the ash pit 23. A gas conduit D with the damper 33 connects the gas outlet of the air heater B and the lower end of the smoke stack 30.

embers on its way to the fuel of a furnace, and hotpases and products of oom- A blower- E is connected to the lower portion of the air heater B.

A fan F for induced draft is interposed 4:3 b is inn" webs b v r be un em'mi gnnied name 351, of

:5 ml ii shambz, 228G553 11 and 3 st? ire 2306mm irsns 11 bet Qufin REES laces of the corrugated plates 106 of the air chambers G. I

The air chambers (i are tightly clamped in a- I'OW in the air heater B, by means of the 2 bars 85 and 88, the flanges 91 of the Z bars bearing against the channel irons 112 and 113 of the air chambers at thcends'oi' the row thereof. The Z bars are clamped in place by means of the bolts 93. Any of the air chambers (i can easily be removed from the casing of the air heater B, by releasing the nuts from the studs 66, the nuts of the front menlbers of the frames 40 and and removing the plate '80, after disengaging the bolts "i6 and 78 respectively from the frames 40 and 45.

Various modilications'may be made in the invention within the spirit of'the. claims and the, present exemplitication is to be taken as illustrative and not limit-ative thereof.

Having described my invention What I desire to secure by Letters Patent and claim is:

l. -In an air heater thecombination of a casing, a pair of adjustable bars at each of the sales of the casing, a plurality of air chambers arranged in a row in the casing with the ends of said row bearing against the pairs of bars, corrugated walls for each of the chambers, each of said chambers havmg an opening at its upper end and an opening at its lower end and means to clamp the adjustable bars to the casing and to bear against said chambers at the-ends of-the row to clamp-the chambers in place in spaced position, I

2, an air heater the combination of a 1 casing, a pair of adjustable bars at each of the sides of the casing, a plurality of air chambers arranged in a row in the casing, corrugated Walls for each chamber, :an element encasing the 'front and'rear portion of each chamber, each front element havinga pair of openings, movable bars at the sides of the casing, and means to clamp the bars to the casing and to bear against said chambers at the ends of the row to clamp them in place with said elements bearing against each other.

In an, air heaterthe combination of a,

casing, 21 pair of adjustable bars at each of the sides of the casing, a plurality of air chambers arranged in a row in 'l'herasing, corrugated side walls spaced apart for each chamber, channel irons cncasing the front and rear portion of each chamber, one of said channel irons having a pair of openings leading into its chamber, movable bars at thesides ot' the casing and means to clamp the bars to the casing and to bear against said channel irons at the ends of said row to clamp'the chambers in place with passages between them.

. 4:. In an air heater the combination ofa casing, a plurality of air chambers dctachably located in a rowin the casing, corrugated side Walls spaced apart tor each chamber, channel irons encasing the trout and rear portion of each chamber, one of the channel irons of each chamber having a pair of openings leading'to its interior, the adjoining faces of said channel irons of adjacent chambers normally bearing a ainst each other, adjustable Z bars atthe si es of the casing with one of the flanges of each normally bearing against the channel irons of the air chambers of the ends of the row, angle irons'at the sides and corners of the casing with one of the flanges of each adjacent to the other flanges of the 2 bars and clamping bolts connectin' the latter flanges of the Z-bars and to adjacent flanges of the angle irons at the corners of the casing.

Signed at the borough of Manhattan cit of New York, in the county of New or and State of New York, this 8th August,'A. D. 1923; i

' CHARLES D. MOSHER- day of

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