US1619567A - Sheet-metal oil-burning air heater - Google Patents
Sheet-metal oil-burning air heater Download PDFInfo
- Publication number
- US1619567A US1619567A US82026A US8202626A US1619567A US 1619567 A US1619567 A US 1619567A US 82026 A US82026 A US 82026A US 8202626 A US8202626 A US 8202626A US 1619567 A US1619567 A US 1619567A
- Authority
- US
- United States
- Prior art keywords
- air
- sheet
- air heater
- combustion chamber
- burning air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 229910052751 metal Inorganic materials 0.000 title description 11
- 239000002184 metal Substances 0.000 title description 11
- 238000002485 combustion reaction Methods 0.000 description 22
- 239000007789 gas Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000005266 casting Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 239000003546 flue gas Substances 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 235000000396 iron Nutrition 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H3/00—Air heaters
- F24H3/02—Air heaters with forced circulation
- F24H3/06—Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators
- F24H3/10—Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators by plates
- F24H3/105—Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators by plates using fluid fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
- F23M20/00—Details of combustion chambers, not otherwise provided for, e.g. means for storing heat from flames
Definitions
- WALTER B CROAN, OF CHICAGO, ILLINOIS, ASSIGNOB T0 DRYING SYSTEMS, INC., OF
- the purpose which it is desired to accomplish by means of this invention is mainly to provide a successful and elicient air heating device using oil as a fuel while not requiring a combustion chamber of yrefractory material or other material which retains such a considerable amount of heat that its life is shortened and it is subject to disintegration, the combustion chamber of the 'present device being a tube of sheet metal around which air is caused to travel at the correct rate for insuring a safe temperature of the tube irrespective of the immense amount of heat which is transmitted thereby and radiated therefrom. Also by means of the present arrangement the tube is kept at the proper temperature to insure constant and combustion without chilling the flame down to the point where carbon will be deposited.
- Another aim of the invention is to provide a combustion chamber permitting maximum radiation of heat from its exterior surface so that the heater maybe provided with the minimum of heating surface in proportion to the work performed.
- Other purposes of the Vinvention are to provide a maximum heating surface within the overall dimensions of the device without interfering with convenient assembly thereof while alsopermitting easy access to the lines for the burned gases.
- Figure 1 is a longitudinal sectional view in elevation of the 'oil burning air heater.
- Fig. 2 is a plan view with the top cover sheet removed.
- Fig. 3 is a front elevation.
- Fig. 4 is a sectional view taken on the line 4 4 of Fig. 1.
- the construction illustrated in the drawings is practically wholly formed from sheet metal except Where angle irons are necessary for strength and that the casing is formed of blocks of magnesia surrounded by sheet metal for receiving a suitable finishing surface.
- the only sheet metal found which is ⁇ capable of withstanding the conditions of operation, of this ⁇ ap paratus is an alloy consisting of iron and chromium.
- One material suitable for the purpose, principally for the combustion tube is known asduralloy, the characteristics of which are very different from ordinary steel as it is only to a very slight degree susceptible to oxidation under normal conditionscooled from high temperature and is softened by sudden chilling.
- the sheet metal combustion tube is made the subject matter of a co-pending ap lication for patent, Serial No. 131,889, fileld August 27, 1926.
- the combustion chamber 1 as shown in the drawings, consists of this material rolled into tubular form, with the meeting edges joined together either by butt-welding or bent over each other to form a seam.
- a suitable casting 2 for closing the same ex-v cept for the inlet air passages and the Venturishaped atomizing chamber 3.
- This chamber is formed by a cylidrical extension 4 of the casting 2 and is lined with a refractory material 5.
- the fuel atomizing nozzle Gis supported on the front of the casting 2.
- the rear end of the combustion chamber is open to a hot gas passageway 7 communicating with a tier of horizontally' extending narrow flue-gas passageways 8.
- the heat of the burning oil in the combustion chamber 1 is suicient to soon destroy the tube and other parts of the structure if it were not for the cooling action of the air traveling through the apparatus and around the combustion tube oppositely to the direction of How of the burned gases. It is therefore essential thatl when the oil burner is set into operation that the required ow of air be at once initiated and into contact with surfaces of continuously lessened temperature. Therefore, the'maximum amount of heat is extracted from the l combustionsgases since, although these gases combustion chambers lined with refractory material and of course lhaving a greatly lessened capacity for heat radiation possible with the sheet metal structure.
- the air to f be heated 1s -irst set in motion or at least simultaneously with the ignition of the fuel, and of course during the normal operation of the oil burner, must at all times be pumped through the apparatus at the reuired rate to keep the sheet metal surfaces t ereof at a safe temperature.
- the air enters through the inlet 13 traveling along the set of passageways 11 and then the set 12, downwardly through the passageway 14 and into the llchamber 15 where it rises due to its temperature and flows around the combustion tube 1 and finally downward at the front end of the apparatus and out through the passageway 16, from which the heated air is conducted to the place of use thereof.
- the products of combustion leave the tube l at its rear end traveling in an opposite direction upwardly through the passage 7 and then' along the passageways 8 and 9 to the cooled gas outlet 10.
- the heated air is successively subjected to higher and higher temperatures while the, oppositely flowing combustion gases successively come may be considerably cooled when nearing the outlet, they-are then in contact with the surfaces subjected to the cooling action ofthe air when at its lowest temperature.
- An oil burning air heater comprising a sheet metal structure forming a combustion chamber anda plurality of narrow -flue gas passageways communicating with the combustion chamber andalternating with narrow passageways for air, means forming an air space surrounding the combustion chamber, and said air space being in communication with 'said air passageways.
- An oil burning air heater comprising a sheet metal structure forming a combustion chamber land a plurality of narrow flue gas passageways communicating with the combustion chamber and alternating with narrow passageways for air, means forming an air space surrounding the combustion chamber, said air space being in communication with said air passageways, air intake means communicating with said narrow passageways for air and air outlet means communicating with the space surrounding the combustion chamber.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
Description
- 1619,56? March 1 1927. W. B. CROAN .I
`SHEET METAL OIL BURNING AIR HEATER Filed Jan.18. 192e s sheets-sheet 1 March 1 1927".`
w, B. cRoAN SHEET METAAL OIL.BURNING AIR HEATR s sheets-sheet 2 Filed Jari. 18, 192e lillllllllll Hlm March 1, 1927. 1,619,567
. w. B. CROAN SHEET METAL OIL BURNING AIR HEATER Filed Jan. 18. 1926 s sheets-sheet im 7 M Patented Mar. 1,-19127. i
UNITED STATES *1,619,561 PATENT OFFICE.
WALTER B. CROAN, OF CHICAGO, ILLINOIS, ASSIGNOB T0 DRYING SYSTEMS, INC., OF
CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.
SHEET-METAL 0ILBURNING AIR HEATER.
'Application led January 18, 1926. Serial No. 82,026.
The purpose which it is desired to accomplish by means of this invention is mainly to provide a successful and elicient air heating device using oil as a fuel while not requiring a combustion chamber of yrefractory material or other material which retains such a considerable amount of heat that its life is shortened and it is subject to disintegration, the combustion chamber of the 'present device being a tube of sheet metal around which air is caused to travel at the correct rate for insuring a safe temperature of the tube irrespective of the immense amount of heat which is transmitted thereby and radiated therefrom. Also by means of the present arrangement the tube is kept at the proper temperature to insure constant and eficient combustion without chilling the flame down to the point where carbon will be deposited. Another aim of the invention is to provide a combustion chamber permitting maximum radiation of heat from its exterior surface so that the heater maybe provided with the minimum of heating surface in proportion to the work performed. Other purposes of the Vinvention are to provide a maximum heating surface within the overall dimensions of the device without interfering with convenient assembly thereof while alsopermitting easy access to the lines for the burned gases.
These objects are successfully accomplished by a construction as shown in the drawings, wherein:
Figure 1 is a longitudinal sectional view in elevation of the 'oil burning air heater.
Fig. 2 ,is a plan view with the top cover sheet removed.
Fig. 3 is a front elevation.
Fig. 4 is a sectional view taken on the line 4 4 of Fig. 1.
The construction illustrated in the drawings, is practically wholly formed from sheet metal except Where angle irons are necessary for strength and that the casing is formed of blocks of magnesia surrounded by sheet metal for receiving a suitable finishing surface. The only sheet metal found which is `capable of withstanding the conditions of operation, of this `ap paratus is an alloy consisting of iron and chromium. One material suitable for the purpose, principally for the combustion tube is known asduralloy, the characteristics of which are very different from ordinary steel as it is only to a very slight degree susceptible to oxidation under normal conditionscooled from high temperature and is softened by sudden chilling. The sheet metal combustion tube is made the subject matter of a co-pending ap lication for patent, Serial No. 131,889, fileld August 27, 1926.
The combustion chamber 1 as shown in the drawings, consists of this material rolled into tubular form, with the meeting edges joined together either by butt-welding or bent over each other to form a seam. At the front end of the combustion chamber is a suitable casting 2 for closing the same ex-v cept for the inlet air passages and the Venturishaped atomizing chamber 3. This chamber is formed by a cylidrical extension 4 of the casting 2 and is lined with a refractory material 5. The fuel atomizing nozzle Gis supported on the front of the casting 2. The rear end of the combustion chamber is open to a hot gas passageway 7 communicating with a tier of horizontally' extending narrow flue-gas passageways 8. At their p then traveling in a reverse direction through the passageways 12 into a vertical air passageway 14 at the rear end of the structure. The air passageway 14 at its lower end communicates with a hot air chamber 15 sur-. rounding the combustion chamber 1. The heated air is finally conducted out of the apparatus through the conduit 16 at the bottom thereof.
The heat of the burning oil in the combustion chamber 1 is suicient to soon destroy the tube and other parts of the structure if it were not for the cooling action of the air traveling through the apparatus and around the combustion tube oppositely to the direction of How of the burned gases. It is therefore essential thatl when the oil burner is set into operation that the required ow of air be at once initiated and into contact with surfaces of continuously lessened temperature. Therefore, the'maximum amount of heat is extracted from the l combustionsgases since, although these gases combustion chambers lined with refractory material and of course lhaving a greatly lessened capacity for heat radiation possible with the sheet metal structure.
In the operation of the device, the air to f be heated 1s -irst set in motion or at least simultaneously with the ignition of the fuel, and of course during the normal operation of the oil burner, must at all times be pumped through the apparatus at the reuired rate to keep the sheet metal surfaces t ereof at a safe temperature. The air enters through the inlet 13 traveling along the set of passageways 11 and then the set 12, downwardly through the passageway 14 and into the llchamber 15 where it rises due to its temperature and flows around the combustion tube 1 and finally downward at the front end of the apparatus and out through the passageway 16, from which the heated air is conducted to the place of use thereof. The products of combustion leave the tube l at its rear end traveling in an opposite direction upwardly through the passage 7 and then' along the passageways 8 and 9 to the cooled gas outlet 10.
By the arrangement shown, the heated air is successively subjected to higher and higher temperatures while the, oppositely flowing combustion gases successively come may be considerably cooled when nearing the outlet, they-are then in contact with the surfaces subjected to the cooling action ofthe air when at its lowest temperature.
Although but one specific embodiment of this invention has been herein shown and described, it will be understood that numerous details of the construction shown may be altered or omitted without departing from the spirit of this invention.
I claim:
1. An oil burning air heater comprising a sheet metal structure forming a combustion chamber anda plurality of narrow -flue gas passageways communicating with the combustion chamber andalternating with narrow passageways for air, means forming an air space surrounding the combustion chamber, and said air space being in communication with 'said air passageways.
2. An oil burning air heater comprising a sheet metal structure forming a combustion chamber land a plurality of narrow flue gas passageways communicating with the combustion chamber and alternating with narrow passageways for air, means forming an air space surrounding the combustion chamber, said air space being in communication with said air passageways, air intake means communicating with said narrow passageways for air and air outlet means communicating with the space surrounding the combustion chamber.
Signed at Chicago this 8th` day of January, 1926.
' WALTER B. cRoAN.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US82026A US1619567A (en) | 1926-01-18 | 1926-01-18 | Sheet-metal oil-burning air heater |
FR621552D FR621552A (en) | 1926-01-18 | 1926-09-15 | Sheet metal air heater, oil heated |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US82026A US1619567A (en) | 1926-01-18 | 1926-01-18 | Sheet-metal oil-burning air heater |
Publications (1)
Publication Number | Publication Date |
---|---|
US1619567A true US1619567A (en) | 1927-03-01 |
Family
ID=22168565
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US82026A Expired - Lifetime US1619567A (en) | 1926-01-18 | 1926-01-18 | Sheet-metal oil-burning air heater |
Country Status (2)
Country | Link |
---|---|
US (1) | US1619567A (en) |
FR (1) | FR621552A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3388697A (en) * | 1966-12-08 | 1968-06-18 | Ernest R Muckelrath | Indirect air heater |
US4182303A (en) * | 1978-02-15 | 1980-01-08 | Tioga Air Heaters Co. | Stacked indirect air heater with single path airflow |
-
1926
- 1926-01-18 US US82026A patent/US1619567A/en not_active Expired - Lifetime
- 1926-09-15 FR FR621552D patent/FR621552A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3388697A (en) * | 1966-12-08 | 1968-06-18 | Ernest R Muckelrath | Indirect air heater |
US4182303A (en) * | 1978-02-15 | 1980-01-08 | Tioga Air Heaters Co. | Stacked indirect air heater with single path airflow |
Also Published As
Publication number | Publication date |
---|---|
FR621552A (en) | 1927-05-30 |
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