US924409A

US924409A - Apparatus for heating air or other gases.

Info

Publication number: US924409A
Application number: US46290308A
Authority: US
Inventors: Wilfred Rothery Wood
Original assignee: UNDERFEED STOKER CO Ltd
Current assignee: UNDERFEED STOKER CO Ltd
Priority date: 1908-11-16
Filing date: 1908-11-16
Publication date: 1909-06-08
Anticipated expiration: 1926-06-08

Description

W. R. WOOD. APPARATUS POE HEATING AIR 0R OTHER GASES.

APPLICATION FILED N.0V.1, 1908.

Patented June 8,1909.

4 SHEETS-SHEET 1.

/NvE/vToR.

w/TNEss/'s.

W. R. WOOD. APPARATUS FOR HEATING AIR 0R OTHER GASES.

APPLIOATION FILED NOV.16, 1908.

Patented June 1 09.

4 SHEETS- /NVE/VTOR @JKM FM W I yW'. R. WOOD. APPARATUS EOE HEATING AIE 0E OTEEE GASES. APPLICATION FILED NOV. 16, 1908.

924,409. Patented June 8, 1909.

y4 sEEETs-SEEET a.

w/ TN ESSA-s.- NVE/WOR dsc, M

W. B.. WOOD. APPARATUS EOE HEATING AIE 0E oTHEE GASES. APPLICATION FILED NOV. 16l 1908. 924,409, Patented June 8, 1909.

4 SHEETS-SHEET 4.

w/TNEssEs.

JSC 03m/V M@ QA-af' ZEW /NVEN To UNITED STATES PATENT oFF-rca.

WILFRED ROTHERY WOOD, OF LONDON, ENGLAND,

ASSIGNOR TO UNDERFEED STOKER COMPANY LIMITED, OF LONDON, ENGLAND, A CORPORATION OF GREAT BRITAIN.

APPARATUS FOR HEATING AIR OR OTHER GASES.

Specification oi.' Letters Patent.

Patented .nine s, 1909.

Application led November 16, 1908. Serial No. 462,903.

Improvement in Apparatus for Heating Air or other Gra-ses, of which the following is a specliicatlon.

Thls mventlon relates more particularly 10 to that class of apparatus employed for heating air or gases by the waste heat from furneces but is also capable of being used for heating by other methods.

The invention consists of an arrangement of plate heater, that is the air or the gases are carried between plates as distinguished from pipes. Heretofore in this class of heater it has been proposed that the air and heating ases should travel practically at right ang es to each other, and it has also been proposed to employ plate heaters in which the gas and air pass through a rectangular box provided with plate divisions the gas and air flowing in contrary directions in alternate layers. In this latter construction the flow of either the gas or air or both is seriously restricted by the sharp changes in the direction of flow in addition towhich much of the h eating surface is inefficient owing to more or less dead corners in such boxes. A

According to the present invention it is proposed that one of the gases shall pass through the heater in practically straight lines while the other shall pass in a curved or semi-circular line and preferably in a generally contrary direction.

For the purpose of illustration assume there is a straight rectangular lflue through which furnace gases arel escaping to a chimney and it is desired to heat air for the purpose of supporting combustion in the furnace cham er. Then according to this invention a series of semi-circular plate boxes suitably separated so as to allow the furnace gases to pass between would be placed in the flue and would be connected at either side of the center of the radius with the air pipes While'the inlet side would preferably be that nearest the chimney. Or if the flue happened to bend at the point where it was desired to insert the heater the same result could be obtained by placing the inlet air pipe on one side of the bend and the outlet on the other. In either case it is desirable to mount cleaning radial blades between the boxes formed by the plates and to arrange that such blades can be` oscillated at will so as to remove any adhering material, such as soot. An alternative method for cleaning is to useI perforated hollow arms secured to a pipe capable of being oscillated and admitting steam thereto so as to cause jets of steam to play over practically the entire surface of the boxes.

It is obvious that boxes formed of the plates as described may be used either as the air heater or for the discharge of furnace gases and in the latter case the air would pass between the boxes while the cleaning lades would be placed therein. The latter construction will however have certain disadvantages over the former particularly in case of dicaning, so that in the accompanying drawings the preferable construction is shown, in which the air passes throughthe boxes, and in saurez- Figure l is a side elevation partly in section of a construction in wluch the air is forced through the boxes, Fig. 2 a sectional elevation on line AB of Fig. 1, Fig. 3 a side elevation in which the air is drawn through the boxes, Fig. 4 asectional elevation on a larger scalcon line X Y of same, Fig. 5 a side elevation on a larger scale of a portion of a box section, and Fig. `6 a sectional elevation on line Z Z of same.

As shown in Figs. 1 and 2 the air from the fan or blower 1 passes down through a series of semi-circular plate boxes 2 located in the flue 3 said boxes being held in position by channel irons 4 the central one of which is here shown as dividing the box into two sections through which the air passes in a direction contrary to the flow of the gases in the flue that is the exit side from the plate boxes or sections are the iirst to absorb the heat from thel flue gases. Between the plate boxes are mounted a series of radial pi es 5 mounted on a steam pipe 6 capable of 'eing rotated so as to cause pipes 5 to travel over practically the entire surface of the boxes and by the discharge of steam through openings 7 to cleanse the outer faces of the boxes from any adhering soot or other matter, or

in lieu of steam, s crapcrs or brushes may be mounted on pipes or rods for attaining the same end.

In Fig. 3 the air is induced through the box sectlons 2 (here shown as three in number but a lesser or greater number may be employed) and this construction has the advantage that should it be necessary to re- 'move any of the box sections this can be done after removing pipe section 8 without stopping, the supply of air from fan or blower 1 to air duct 9 but in other respects the construction and operation is as described With reference to Figs. 1 and 2 except that as shown in Figs. 4 to 6 the box sections are formed of stamped sheet metal bolted or riveted at 10.

It will be obvious that the air in the upper box section would normally be subjected to the heat for a shorter time than that passing through the lower sections but this can be prevented by somewhat checking the flow as by placing Wire gauze or other retarding means at points 1l and when a longer subjection of the air to the heat is desired the heater may be doubled that is i' rom the outlet of a single heater the plates or sections may be again carried into and out of the iiue. If it is desired to further utilize the heat radiated from the inner sides of the plate boxes this end may be attained by inserting separate sheets of metal 12 into said oxes as shown by dotted lines in Fig. 6.

VWhat I claim is 1. In apparatus for heating air or gases of the late heating class, a heater constructed of plates forming a series of separated substantially semi-circular chambers through which one of the gases can pass, a flue or chamber adapted to receive the heater and to conduct the other gas between the chambers of the heater in a direction substantially normal to the inlet andoutlet flow of the gas in the chambers.

2. In apparatus for heating air or gases of the late heating class, a heater constructed of p ates forming a series of separated substantially semi-circular chambers through which one of the gases can pass, a flue or chamber adapted to receive the heater and= to conduct the other gas between the chambers of the heater in a direction substantially normal to the inlet and outlet low of the gas in the chambers, such inlet and outlet from he chambers being on the same side of the lue.

3.' Ina paratus forA heating air or gases of the late heating class, a heater constructed of p ates forming a series of separated substantially semi-circular chambers through which one of the gases can pass, a ilue or chamber adapted to receive the heater and to conduct the other gas between the chambers of the heater in a direction substantially normal tothe inlet and outlet How of the gas in the chambers the separate chambers of Whilch are connected to a common inlet and out et.

4. In apparatus for heating air or gases of the late heating class, a heater constructed of p ates forming a series of separated substantially semi-circular chambers through which one of the gases can pass, a flue or chamber adapted to receive the heater and to conduct the other` gas between the chambers of the heater in a direction substantially normal to the inlet and outlet How ci' the gas in the chambers, the chambers of the heater carrying internal lates adapted to absorb the heat radiated y the outer plates of the chambers.

5. In apparatus for heating air or gases o1' the plate heating class, a heater constructed of plates forming a series of separated substantially semi-circular chambers through which one of the gases can pass, a lue or chamber adapted to receive the heater and to conduct the other gas between the chambers of the heater in a direction substantially normal to the inlet and outlet flow of the gas in the chambers, and means for cleaning the heater and freeing it from adhering material.

6. In apparatus for heating air or gases of the late heating class, a heater constructed of plates forming a series of separated substantially semi-circular chambers through which one of the gases can pass, a flue or chamber adapted to receive the heater and to conduct the other gas between the charnbers of the heater in a direction substantially normal to the inlet and outlet flow of the gas in the chambers, such inlet and outlet from the chambers being on the same side of the flue, the separate chambers being connected to a common inlet and outlet.

7. In apparatus for heating air or gases of the late heating class, a heater constructed of p ates forming a series of separated substantially semi-circular chambers through which one of the gases can pass, a flue or chamber adapted to receive the heater and to conduct the other gas between the chambers of the heater in a direction substantially normal to the inlet and outlet ilow of the gas in the chambers, such inlet and outlet from the heater being on the same side of the lue, the chambers of the heater carrying internal lates adapted to absorb the heat radiated y the outer plates of the chambers.

8. In apparatus for heating air or gases of the late heating class, a heater constructed of p ates forming a series of separated substantially semi-circular chambers through which onel of the gases can pass, a flue or chamber adapted to receive the heater and to conduct the other gas between the chambers of the heater in a direction substantially normal to the inlet and outlet ilow of the gas in the chamber, such inlet and outlet from the heater being on the same side of the flue, and means for cleaning the heater and freeing it from adhering material.

9. In apparatus for heating air or gases of the plate heating class, a heater constructed of p ates forming a series of separated substantially semi-circular chambers through.

bers of the heater in a direction substantially,

normal to the inlet and outlet flow of the gas in the chambers, the separate chambers of Which are connected to a common inlet and outlet, the chambers of the heater carr ing internal plates adapted to absorb the eat radiated y the outer plates of the chambers. 10. IIn apparatus for heating air or gases f tlfie plate heating class, a heater constructed o staiitially semi-circular chambers through which one ofl the gases can pass, a iiue or chamber adapted to receive the heater and to conduct the other gas between the chambers of the heater in a direction substantially normal to the inlet and outlet flow ofthe gas in the chambers, the separate chambers of which are connected toa common inlet and ates forming a series of separated sub-` outlet, and means for cleaning the heater and freeing it from adhering material.

11. In apparatus for heating air or gases of the plate heating class, a heater constructed of p ates forming a series of separated substantially semi-circular chambers through which one of the gases can pass, a i'lue or chamber adapted to receive the heater and to conduct the other gas between the chambers of the heater in a direction substantially normal to the inlet and outlet flow of the gas in the chambers, the chambers of the heater carrying internal lates adapted to absorb the heat radiated bf the outer plates of the chambers, and means for cleaning the heater and freeing it from adhering material.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

WILFRED ROTHERY `WOOD.

Witnesses B. HENDERSON, I-I. C. WooDcRAFT.