US3182638A - Fired heater - Google Patents
Fired heater Download PDFInfo
- Publication number
- US3182638A US3182638A US259564A US25956463A US3182638A US 3182638 A US3182638 A US 3182638A US 259564 A US259564 A US 259564A US 25956463 A US25956463 A US 25956463A US 3182638 A US3182638 A US 3182638A
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- tubes
- side walls
- cells
- setting
- roof
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G9/00—Thermal non-catalytic cracking, in the absence of hydrogen, of hydrocarbon oils
- C10G9/14—Thermal non-catalytic cracking, in the absence of hydrogen, of hydrocarbon oils in pipes or coils with or without auxiliary means, e.g. digesters, soaking drums, expansion means
- C10G9/18—Apparatus
- C10G9/20—Tube furnaces
Definitions
- This invention relates to the heating of fluids. It is a fired heater suitable for such uses as high temperature cracking of hydrocarbon oils, thermal polymerization of light hydrocarbons or hydrogenation of oils.
- the present invention provides a novel heater design by which the difficulty of non-uniform heat inux is overcome. More particularly, this design contemplates the passage of process lluid through vertical tubes positioned medially between radiant refractory walls. Short flame burners inject llames into elongated troughs adjacent the side Walls to lill the troughs so that hot combustion gases spread to sweep the side walls affording uniform temperature of the radiation sources. Additionally, steep rims shield the tubes from direct impingement of combustion gases.
- this disclosure teaches a combination of features which attains more uniform high tempera-ture. Tests have shown that this combination affords a temperature deviation of less than two percent over the radiant walls. With overlapping of radiation from the Walls -to the tubes there is practically a constant heat availability to each of the tubes over its entire length between a pair of side walls.
- yFIGURE I is an end elevation view in section taken along line II of FIGURE Il and showing a heater embodying the present advance.
- FIGURE II is a side elevation View in section taken along line VII-II of FIGURE I.
- FIGURE III is a fragmented isometric view of a portion of the heater and depicts the relationship of burners, radiant side walls and tubes.
- ⁇ FIGURE IV is an enlarged sectional View of a preferred type of floor burner.
- FIGURE V is a sectional view taken along line V-V of FIGURE IV.
- a rectangular setting generally designated 1 has oor 2 and roof 3.
- Partition means shown as longitudinal partition 4 and transverse partitions 6 project upward from floor 2 to define a plurality of substantially rectangular cells 7.
- Longitudinal partition 4 and longitudinal walls S of the setting are faced with refractory to provide pairs of parallel refractory faced side walls oppositely disposed each relative the other in the setting.
- Floor 2 defines elongated troughs 9 adjacent and parallel to each of these side walls.
- Burners 11 Vare disposed to inject a short llame into each of the troughs 9.
- Burner nozzles 12 are elongated to provide a longitudinal projection parallel to each of the side walls.
- a plurality of iiame openings 13 are provided so that ame substantially fills troughs 9 with a major portion of the fuel combustion completed in troughs 9. Hot combustion gases tend toward following the side walls passing in sweeping relationship over substantially the entire surface of each side wall for heating the refractory to a uniform tempera-ture.
- fuel is conducted via pipes 14 to burners 11.
- Primary air enters at 16 and mixes with fuel in burner chamber 17.
- Secondary air enters through ports 18 and passage 19 to support combustion of the fuel.
- Vertical tubes 21 are mounted in a row between opposed pairs of side walls and are arranged to receive radiation 1from both of the associated side walls over substantially the entire lengths of the tubes therebetween.
- Steep rims 22 on the sides of troughs 9 adjacent tubes 21 divert the hot combustion gases so that they do not directly -impinge onto tubes 21.
- Flue means comprising flue passage 23, communicate with each cell 7 for removing products of combustion therefrom.
- Partitions 4 and 6 project upward from floor 2 and have upper ends 24 and 26 respectively spaced from roof 3 to define common passage 27 communicating among cells 7.
- Flue passage 23 communicates with tine port 28 to exhaust combustion products from all of the cells '7 via common passage 27.
- Process iluid is circula-ted serially through tubes 21 disposed in a row approximately midway between opposed side walls. As best shown in FIGURE II, each tube 21 is arranged in a coplanar serpentine configuration. Loops 29 pass over transverse partitions 6 to conneet tubes 21. Suspension means shown as straps 31 are connected between roof 3 and at least one of the tubes 21 to support the tubes.
- Preheat conduit 32 disposed in ilue passage 23 is connected in flow series upstream of tubes 21 to preheat the process fluid.
- the firing rates of burners 11 in each cell 7 are controlled (by means well known in the heater art) so that heat flux in each cell 7 is maintained at a desired intensity.
- a heater comprising a setting having a door
- aleaeae a partition defining a plurality of substantially rectangular cells in the setting
- trough means immediately adjacent, approximately coextensive, and parallel to each of the side walls along the bottom thereof,
- a plurality of short burst flame burners disposed to inject flame into each of the troughs to fill the troughs so that hot combustion gases pass in sweeping relationship over substantially the entire surface of each of the side walls for heating the refractory to unform temperature
- the tubes spaced apart sufliciently so that each receives radiation evenly around the periphery thereof from both of a pair of the side walls over substantially the entire length of the tube between the side walls,
- each of the troughs having a steep rim on the side adjacent the associated tube to divert the hot cornbustion gases so that they will not impinge thereon,
- a heater comprising a rectangular setting having a Hoor and a roof
- each cell having a pair of side walls faced with refractory and disposed oppositely relative each other and trough means immediately adjacent, approximately coextensive and parallel to each of the side walls longitudinally relative the setting,
- a plurality of short burst flame burners disposed to inject flame into each 0f the troughs to ll the troughs so that hot combustion gases pass in sweeping relationship over substantially the entire surface of each of the side walls for heating the refractory to a uniform temperature
- each of the interior walls having an upper end spaced from the roof to define a common passage cornmunicating among the cells
- a flue housing connected to the roof of the setting and defining a flue passage
- the roof describing a flue port communicating the common passage with the flue passage to exhaust products of combustion from all of the cells therethrough,
- each of the trough means having means on the side adjacent the associated tubes to divert the hot combustion gases so that they will not impinge thereon,
- each of the tubes spaced apart sufficiently so that each receives radiation evenly around the periphery thereof from both of the side walls over substantially the entire length of the tube between the side walls,
- each row of aligned vertical tubes constituting a flow pass the interior walls permitting independent pass control.
- a heater comprising a setting having a floor
- partition means defining a plurality of substantially rectangular separate cells within the setting, each of the cells including a pair of upright refractory faced side walls oppositely disposed,
- elongated trough means immediately adjacent, approximately coextensive and parallel to each of the side walls along the bottom thereof,
- a plurality of short burst llame burners disposed to inject flame into each of the troughs to fill the troughs so that hot combustion gases pass in sweeping relationship over substantially the entire surface of each of the side walls for heating the refractory to a uniform radiating temperature
- each of the trough means having means on the side adjacent the associated tubes to divert the hot combustion gases so that they will not impinge thereon,
Description
May 11, 1965 F. A. LEE ETAL FIRED HEATER Filed Feb. 19. 1963 3 Sheets-Sheet 2 May 11, 1965 F. A. LEE ETAL FIRED HEATER 3 Sheets-Sheetl 3 V Filed Feb.y 19. 1963 United States Patent O 3,132,636 EIRED HEATER Frank A. Lee, Westwood, NJ., Peter von Wiesenthal,
New York, N117., and Kenneth R. Wagner, .Iersey City,
NJ., assignors to Foster Wheeler Corporation, New
`tork, NX., a corporation of New York Filed Feb. 19, 1963, Ser. No. 259,564 3 Claims. (Cl. 122-240) This application is a continuation-in-part of application Serial No. 144,409, tiled October l1, 1961, and now abandoned.
This invention relates to the heating of fluids. It is a fired heater suitable for such uses as high temperature cracking of hydrocarbon oils, thermal polymerization of light hydrocarbons or hydrogenation of oils.
In giving physical realty to prescribed process conditions, it is often necessary to maintain iluids for specific periods of time at elevated temperatures. Space velocity is easily regulated by flow controls. The principal problem is to tix a uniform high temperature about the peripheries and along the lengths of tubes. Attempts to employ tired heaters in providing such reaction conditions have been confounded by local scorching of process streams, coke clogging and local tube deterioration.
The present invention provides a novel heater design by which the difficulty of non-uniform heat inux is overcome. More particularly, this design contemplates the passage of process lluid through vertical tubes positioned medially between radiant refractory walls. Short flame burners inject llames into elongated troughs adjacent the side Walls to lill the troughs so that hot combustion gases spread to sweep the side walls affording uniform temperature of the radiation sources. Additionally, steep rims shield the tubes from direct impingement of combustion gases.
Basically this disclosure teaches a combination of features which attains more uniform high tempera-ture. Tests have shown that this combination affords a temperature deviation of less than two percent over the radiant walls. With overlapping of radiation from the Walls -to the tubes there is practically a constant heat availability to each of the tubes over its entire length between a pair of side walls.
In tired heaters various heat ux requirements often exist along the path of the fluid. By the present design the intensity of heat flux in each cell can be controlled independently of the intensities in other cells so that each cell may be tired to yield a specific intensity for the conversion rate there desired. Additional advantages are derived from the use of floor burners.
Temperature difference between shut-down and fired conditions can give rise to expensive tube design and support diiculties. Accordingly, a further advantage of this design resides in its reverse U-bend coplanar serpentine tube configuration. By this expedient, the tube, itself, serves as a multibend expansion joint. Inlet and outlet connections can be fixed with all of the expansion of the tubes being absorbed by accordion deflection of .the ser.- pentine tubes. Accordion deection relieves stresses which might otherwise be imposed on external piping. This feature eliminates the necessity for expensive tube supports to control and direct ther-mal movements. The tubes may be simply suspended in position. Vertical insertion and removal is accommodated. As a further construction simplification, tubes in successive cells can be serially connected above the partitions.
These and other -advantages will appear more fully from the accompanying drawings wherein:
yFIGURE I is an end elevation view in section taken along line II of FIGURE Il and showing a heater embodying the present advance.
F lce FIGURE II is a side elevation View in section taken along line VII-II of FIGURE I.
FIGURE III is a fragmented isometric view of a portion of the heater and depicts the relationship of burners, radiant side walls and tubes.
`FIGURE IV is an enlarged sectional View of a preferred type of floor burner.
FIGURE V is a sectional view taken along line V-V of FIGURE IV.
As shown in the drawings, a rectangular setting generally designated 1 has oor 2 and roof 3. Partition means shown as longitudinal partition 4 and transverse partitions 6 project upward from floor 2 to define a plurality of substantially rectangular cells 7. Longitudinal partition 4 and longitudinal walls S of the setting are faced with refractory to provide pairs of parallel refractory faced side walls oppositely disposed each relative the other in the setting.
As best seen in FIGURES IV and V, fuel is conducted via pipes 14 to burners 11. Primary air enters at 16 and mixes with fuel in burner chamber 17. Secondary air enters through ports 18 and passage 19 to support combustion of the fuel.
Steep rims 22 on the sides of troughs 9 adjacent tubes 21 divert the hot combustion gases so that they do not directly -impinge onto tubes 21.
Flue means, comprising flue passage 23, communicate with each cell 7 for removing products of combustion therefrom. Partitions 4 and 6 project upward from floor 2 and have upper ends 24 and 26 respectively spaced from roof 3 to define common passage 27 communicating among cells 7. Flue passage 23 communicates with tine port 28 to exhaust combustion products from all of the cells '7 via common passage 27.
Process iluid is circula-ted serially through tubes 21 disposed in a row approximately midway between opposed side walls. As best shown in FIGURE II, each tube 21 is arranged in a coplanar serpentine configuration. Loops 29 pass over transverse partitions 6 to conneet tubes 21. Suspension means shown as straps 31 are connected between roof 3 and at least one of the tubes 21 to support the tubes.
As process fluid courses from cell to cell, the firing rates of burners 11 in each cell 7 are controlled (by means well known in the heater art) so that heat flux in each cell 7 is maintained at a desired intensity.
It will be understood by those skilled in the fired heater art that changes may be made in the details of construction of this heater Without departing from this invention as defined in the claims.
What is claimed is:
l. A heater comprising a setting having a door,
aleaeae a partition defining a plurality of substantially rectangular cells in the setting,
means in each of the cells providing a pair of upright refractory faced side Walls oppositely disposed each relative the other,
trough means immediately adjacent, approximately coextensive, and parallel to each of the side walls along the bottom thereof,
a plurality of short burst flame burners disposed to inject flame into each of the troughs to fill the troughs so that hot combustion gases pass in sweeping relationship over substantially the entire surface of each of the side walls for heating the refractory to unform temperature,
a single row of aligned vertical tubes supported approximately midway between said pairs of refractory faced side walls in each of said cells,
the tubes spaced apart sufliciently so that each receives radiation evenly around the periphery thereof from both of a pair of the side walls over substantially the entire length of the tube between the side walls,
each of the troughs having a steep rim on the side adjacent the associated tube to divert the hot cornbustion gases so that they will not impinge thereon,
means for coursing a process fluid through each of the tubes,
means connecting the tubes of separate cells in series,
a common ue communicating in flow series with each of the cells for exhausting products of combustion therefrom.
2. A heater comprising a rectangular setting having a Hoor and a roof,
at least one interior longitudinal wall projecting upward from the floor,
at least one interior transverse wall projecting upward from the floor,
said walls and the setting defining at least two longitudinal rows of cells in the setting,
each cell having a pair of side walls faced with refractory and disposed oppositely relative each other and trough means immediately adjacent, approximately coextensive and parallel to each of the side walls longitudinally relative the setting,
a plurality of short burst flame burners disposed to inject flame into each 0f the troughs to ll the troughs so that hot combustion gases pass in sweeping relationship over substantially the entire surface of each of the side walls for heating the refractory to a uniform temperature,
each of the interior walls having an upper end spaced from the roof to define a common passage cornmunicating among the cells,
a flue housing connected to the roof of the setting and defining a flue passage,
the roof describing a flue port communicating the common passage with the flue passage to exhaust products of combustion from all of the cells therethrough,
a single row of aligned vertical tubes disposed in each of the cells and spaced approximately midway between a pair of opposite side walls,
each of the trough means having means on the side adjacent the associated tubes to divert the hot combustion gases so that they will not impinge thereon,
each of the tubes spaced apart sufficiently so that each receives radiation evenly around the periphery thereof from both of the side walls over substantially the entire length of the tube between the side walls,
means connecting the tubes in each row of aligned tubes in flow series,
at least one of the tubes of each row of aligned tubes connected serially with a tube in the next adjacent cell whereby a process fluid is passed in series through adjacent cells,
each row of aligned vertical tubes constituting a flow pass, the interior walls permitting independent pass control.
3. A heater comprising a setting having a floor,
a partition means defining a plurality of substantially rectangular separate cells within the setting, each of the cells including a pair of upright refractory faced side walls oppositely disposed,
elongated trough means immediately adjacent, approximately coextensive and parallel to each of the side walls along the bottom thereof,
a plurality of short burst llame burners disposed to inject flame into each of the troughs to fill the troughs so that hot combustion gases pass in sweeping relationship over substantially the entire surface of each of the side walls for heating the refractory to a uniform radiating temperature,
a single row of substantially aligned vertical tubes in each of the cells supported approximately midway between the side walls spaced apart sufficiently so that each receives evenly around the periphery thereof radiation from both of the side walls for substantially the entire length of the tube between the side walls,
each of the trough means having means on the side adjacent the associated tubes to divert the hot combustion gases so that they will not impinge thereon,
means connecting the tubes of one cell in flow series with the tubes of another cell,
means for coursing a process fluid through the tubes,
the tubes in each cell constituting a process fluid pass whereby the separation of cells permits independent pass control.
References Cited by the Examiner UNITED STATES PATENTS 2,456,786 12/48 Kniel et al. 122-356 2,456,787 12/48 Kniel 122-356 2,625,916 l/53 Barnes 122-240 2,625,918 l/53 Lumly 122-356 2,825,313 3/58 Born et al 122-356 3,066,656 12/62 HenSet 122-356 60 ROBERT A. OLEARY, Primary Examiner.
KENNETH W. SPRAGUE, Examiner.
Claims (1)
- 2. A HEATER COMPRISING A RECTANGULAR SETTING HAVING A FLOOR AND A ROOF, AT LEAST ONE INTERIOR LONGITUDINAL WALL PROJECTING UPWARD FROM THE FLOOR, AT LEAST ONE INTERIOR TRANSVERSE WALL PROJECTING UPWEARD FROM THE FLOOR, SAID WALLS AND THE SETTING DEFINING AT LEAST TWO LONGITUDINAL ROWS OF CELLS IN THE SETTING EACH CELL HAVING A PAIR OF SIDE WALLS FACED WITH REFRACTORY AND DISPOSED OPPOSITELY RELATIVE EACH OTHER AND TROUGH MEANS IMMEDIATELY ADJACENT, APPROXIMATELY COEXTENSIVE AND PARALLEL TO EACH OF THE SIDE WALLS LONGITUDINALLY RELATIVE TO SETTING, A PLURALITY OF SHORT BURST FLAME BURNERS DISPOSED TO INJECT FLAME INTO EACH OF THE TROUGHS TO FILL THE TROUGHS SO THAT HOT COMBUSTION GASES PASS IN SWEEPING RELATIONSHIP OVER SUBSTANTIALLY THE ENTIRE SURFACE OF EACH OF THE SIDE WALLS FOR HEATING THE REFRACTORY TO A UNIFORM TEMPERATURE, EACH OF THE INTERIOR WALLS HAVING AN UPPER END SPACED FROM THE ROOF TO DEFINE A COMMON PASSAGE COMMUNICATING AMONG THE CELLS, A FLUE HOUSING CONNECTED TO THE ROOF OF THE SETTING AND DEFINING A FLUE PASSAGE, THE ROOF DESCRIBING A FLUE PORT COMMUNICATING THE COMMON PASSAGE WITH THE FLUE PASSAGE TO EXHAUST PRODUCTS OF COMBINATION FROM ALL OF THE CELLS THERETHROUGH, A SINGLE ROW OF ALIGNED VERTICAL TUBES DISPOSED IN EACH OF THE CELLS AND SPACED APPROXIMATELY MIDWAY BETWEEN A PAIR OF OPPOSITE SIDE WALLS, EACH OF THE TROUGH MEANS HAVING MEANS ON THE SIDE ADJACENT THE ASSOCIATED TUBES TO DIVERT THE HOT COMBUSTION GASES SO THAT THEY WILL NOT IMPINGE THEREON, EACH OF THE TUBES SPACED APART SUFFICIENTLY SO THAT EACH RECEIVES RADIATION EVENLY AROUND THE PERIPHERY THEREOF FROM BOTH OF THE SIDE WALLS OVER SUBSTANTIALLY THE ENTIRE LENGTH OF THE TUBE BETWEEN THE SIDE WALLS, MEANS CONNECTING THE TUBES IN EACH ROW OF ALIGNED TUBES IN FLOW SERIES, AT LEAST ONE OF THE TUBES OF EACH ROW OF ALIGNED TUBES CONNECTED SERIALLY WITH A TUBE IN THE NEXT ADJACENT CELL WHEREBY A PROCESS FLUID IS PASSED IN SERIES THROUGH ADJACENT CELLS, EACH ROW OF ALIGNED VERTICAL TUBES CONSTITUTING A FLOW PASS, THE INTERIOR WALLS PERMITTING INDEPENDENCE PASS CONTROL.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US259564A US3182638A (en) | 1963-02-19 | 1963-02-19 | Fired heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US259564A US3182638A (en) | 1963-02-19 | 1963-02-19 | Fired heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3182638A true US3182638A (en) | 1965-05-11 |
Family
ID=22985448
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US259564A Expired - Lifetime US3182638A (en) | 1963-02-19 | 1963-02-19 | Fired heater |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US3182638A (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3291104A (en) * | 1965-09-30 | 1966-12-13 | Waste Heat Engineering Corp | Tubular heater |
| US3385269A (en) * | 1967-01-26 | 1968-05-28 | Selas Corp Of America | Tube heating furnace |
| US3385271A (en) * | 1967-01-31 | 1968-05-28 | Selas Corp Of America | Tube heater |
| US3405691A (en) * | 1966-08-26 | 1968-10-15 | Pullman Inc | Zoned furnace |
| DE2203420A1 (en) * | 1971-01-25 | 1972-08-17 | Lummus Co | Method and device for heating a flowing medium |
| DE1501962B1 (en) * | 1966-02-04 | 1972-12-14 | Selas Corp Of America | Heater for fluids |
| US4324649A (en) * | 1980-07-08 | 1982-04-13 | Pullman Incorporated | Fired process heater |
| US4412975A (en) * | 1980-07-08 | 1983-11-01 | Pullman Incorporated | Fired process heater |
| US4494485A (en) * | 1983-11-22 | 1985-01-22 | Gas Research Institute | Fired heater |
| US5005530A (en) * | 1990-06-08 | 1991-04-09 | Tsai Frank W | Furnace radiant sections with vertical heat exchanger tubing, and convection section |
| US5394837A (en) * | 1994-02-25 | 1995-03-07 | Tsai; Frank W. | High-efficiency furnace |
| US20020110505A1 (en) * | 2000-12-20 | 2002-08-15 | Shoou-I Wang | Reformer process with variable heat flux side-fired burner system |
| US20180051906A1 (en) * | 2015-06-30 | 2018-02-22 | Uop Llc | Alternative coil for fired process heater |
| WO2020047058A1 (en) | 2018-08-31 | 2020-03-05 | Uop Llc | Segregated fired heater |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2456787A (en) * | 1946-03-09 | 1948-12-21 | Lummus Co | Process and apparatus for heating hydrocarbon fluids |
| US2456786A (en) * | 1945-05-18 | 1948-12-21 | Lummus Co | Heating of hydrocarbon fluids |
| US2625918A (en) * | 1949-01-19 | 1953-01-20 | Thomas M Lumly | Fluid heating apparatus |
| US2625916A (en) * | 1950-11-16 | 1953-01-20 | Universal Oil Prod Co | Modified up-draft type of heaters |
| US2825313A (en) * | 1955-01-10 | 1958-03-04 | Born Engineering Company | Heaters |
| US3066656A (en) * | 1960-05-03 | 1962-12-04 | Universal Oil Prod Co | Fluid heater |
-
1963
- 1963-02-19 US US259564A patent/US3182638A/en not_active Expired - Lifetime
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2456786A (en) * | 1945-05-18 | 1948-12-21 | Lummus Co | Heating of hydrocarbon fluids |
| US2456787A (en) * | 1946-03-09 | 1948-12-21 | Lummus Co | Process and apparatus for heating hydrocarbon fluids |
| US2625918A (en) * | 1949-01-19 | 1953-01-20 | Thomas M Lumly | Fluid heating apparatus |
| US2625916A (en) * | 1950-11-16 | 1953-01-20 | Universal Oil Prod Co | Modified up-draft type of heaters |
| US2825313A (en) * | 1955-01-10 | 1958-03-04 | Born Engineering Company | Heaters |
| US3066656A (en) * | 1960-05-03 | 1962-12-04 | Universal Oil Prod Co | Fluid heater |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3291104A (en) * | 1965-09-30 | 1966-12-13 | Waste Heat Engineering Corp | Tubular heater |
| DE1501962B1 (en) * | 1966-02-04 | 1972-12-14 | Selas Corp Of America | Heater for fluids |
| US3405691A (en) * | 1966-08-26 | 1968-10-15 | Pullman Inc | Zoned furnace |
| US3385269A (en) * | 1967-01-26 | 1968-05-28 | Selas Corp Of America | Tube heating furnace |
| US3385271A (en) * | 1967-01-31 | 1968-05-28 | Selas Corp Of America | Tube heater |
| DE2203420A1 (en) * | 1971-01-25 | 1972-08-17 | Lummus Co | Method and device for heating a flowing medium |
| US4324649A (en) * | 1980-07-08 | 1982-04-13 | Pullman Incorporated | Fired process heater |
| US4412975A (en) * | 1980-07-08 | 1983-11-01 | Pullman Incorporated | Fired process heater |
| US4494485A (en) * | 1983-11-22 | 1985-01-22 | Gas Research Institute | Fired heater |
| US5005530A (en) * | 1990-06-08 | 1991-04-09 | Tsai Frank W | Furnace radiant sections with vertical heat exchanger tubing, and convection section |
| US5394837A (en) * | 1994-02-25 | 1995-03-07 | Tsai; Frank W. | High-efficiency furnace |
| US20020110505A1 (en) * | 2000-12-20 | 2002-08-15 | Shoou-I Wang | Reformer process with variable heat flux side-fired burner system |
| US20050158678A1 (en) * | 2000-12-20 | 2005-07-21 | Shoou-I Wang | Reformer process with variable heat flux side-fired burner system |
| US20180051906A1 (en) * | 2015-06-30 | 2018-02-22 | Uop Llc | Alternative coil for fired process heater |
| US10330340B2 (en) * | 2015-06-30 | 2019-06-25 | Uop Llc | Alternative coil for fired process heater |
| WO2020047058A1 (en) | 2018-08-31 | 2020-03-05 | Uop Llc | Segregated fired heater |
| CN112673210A (en) * | 2018-08-31 | 2021-04-16 | 环球油品有限责任公司 | Split type roasting heater |
| EP3844438A4 (en) * | 2018-08-31 | 2021-12-22 | Uop Llc | Segregated fired heater |
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