GB2149629A - Sealing means for burner/reactor - Google Patents

Sealing means for burner/reactor Download PDF

Info

Publication number
GB2149629A
GB2149629A GB08406905A GB8406905A GB2149629A GB 2149629 A GB2149629 A GB 2149629A GB 08406905 A GB08406905 A GB 08406905A GB 8406905 A GB8406905 A GB 8406905A GB 2149629 A GB2149629 A GB 2149629A
Authority
GB
United Kingdom
Prior art keywords
sealing
reactor
sealing ring
plasma generator
burner
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.)
Withdrawn
Application number
GB08406905A
Other versions
GB8406905D0 (en
Inventor
Gunnar Astner
Sten-Ove Sjostrom
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SKF Steel Engineering AB
Original Assignee
SKF Steel Engineering AB
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by SKF Steel Engineering AB filed Critical SKF Steel Engineering AB
Publication of GB8406905D0 publication Critical patent/GB8406905D0/en
Publication of GB2149629A publication Critical patent/GB2149629A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D99/00—Subject matter not provided for in other groups of this subclass
    • F27D99/0001—Heating elements or systems
    • F27D99/0033—Heating elements or systems using burners
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
    • H05H7/00—Details of devices of the types covered by groups H05H9/00, H05H11/00, H05H13/00
    • 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
    • F23M11/00—Safety arrangements
    • F23M11/02—Preventing emission of flames or hot gases, or admission of air, through working or charging apertures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D99/00—Subject matter not provided for in other groups of this subclass
    • F27D99/0073—Seals

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Plasma & Fusion (AREA)
  • Physics & Mathematics (AREA)
  • Combustion & Propulsion (AREA)
  • Plasma Technology (AREA)
  • Furnace Details (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Glass Compositions (AREA)
  • Discharge Heating (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Gas Burners (AREA)

Abstract

The invention relates to a means for sealing a reactor during connection of a plasma generator. The means comprises a sealing ring (13) arranged in a seat (12), said ring having openings (18) for the introduction of protective gas. <IMAGE>

Description

SPECIFICATION Sealing means The present invention relates to a means for sealing a reactor during connection of a burner to a shaft furnace, preferably during connection of a plasma generator to a tuyere in a shaft furnace, for example for metal oxide reduction.
Swedish Patent Application No. 83 04 722-5 describes a method and means for exchanging plasma generators during continuous operation of a shaft furnace reactor.
This is achieved with the aid of a valve arranged in the reactor wall in conjunction with the reactor tuyère, this valve completely sealing the reactor from the surrounding atmosphere when the plasma generator is removed, it being possible to open the valve only when the plasma generator is removed, it being possible to open the valve only when the plasma generator is in its sealing position, i.e. with its nose partially inserted in the connection part of the reactor tuyère.
The drawback of the method described is that during the interval between opening the valve and movement of the plasma generator from its sealing position to its operating position, leakage occurs in the gap between the wall of the reactor tuyere and the nose of the plasma generator. This leakage can be minimized by making the opening in the connection part of the tuyère fit tightly around the nose of the plasma generator. This reduces leakage somewhat. However, it makes manufacture more expensive and insertion of the plasma generator more complicated.
The object of the present invention is to provide a sealing means which entirely eliminates leakage during insertion of a burner into a reactor during operation, until the plasma generator has been inserted in its operating position where it is sealed against the sealing surface on the reactor. This is particularly important during insertion of a plasma generator from its sealing position when a valve which normally fully seals the reactor from the surrounding atmosphere is opened.
According to the present invention there is provided means for sealing a reactor during connection of a burner to a reactor tuyère, comprising a sealing ring adapted to be arranged in a seat at the connection between the burner and the reactor tuyère, said sealing ring having openings for the introduction of protective gas.
By using a protective gas at substantially the same pressure as, or a pressure greater than, that in the reactor, it is ensured that no gas can leak out from inside the reactor and also that the connection part of the reactor tuyère can be given a loose fit. This considerably facilitates and increases the speed of insertion.
Further characteristics and advantages of the present invention will be revealed in the following detailed description, given with reference to the accompanying drawings in which: the connection part of a reactor tuyère with a the connection part of a reactor tuy1ere with a plasma generator inserted in the operating position, and Figure 2 shows an enlarged view of the sealing arrangement in accordance with the present invention.
Figure 1 shows a plasma generator 1 with its nose 2 inserted in the operating position in the connection part 3 of a reactor tuyère 4, arranged in the wall of a shaft furnace, not shown in detail.
The plasma generator is inserted to a sealing position where the valve disc 6 of the valve 5 opens, after which the generator is inserted into the operating position shown in the drawing. A front surface 7 of the plasma generator then seals against a sealing surface 8 on the portion of the connection part facing outwards. Some form of sealing means is also preferably arranged between the two surfaces 7 and 8.
The sealing arrangement according to the invention, shown on an enlarged scale in Figure 2, comprises a flange 9 with a channel 10 for the supply of some form of protective gas. In the flange 9 is a seat 12 for an inner sealing ring 13. The sealing ring 13 is held in position by a locking ring 14, secured by bolts, indicated by broken lines at 15. Figure 2 also shows an O-ring seal 16 sealing between the plasma generator and the sealing surface 7.
The sealing ring 13 is provided with a radially inwardly facing groove 17 with openings 18 communicating with the annular space 19 outside the sealing ring 13. Protective gas is supplied to the space 19 through the channel 10 mentioned above.
The design according to the present invention permits the fit between the connection part 3 of the tuyère and the plasma generator to be generous, while the actual sealing ring 13 can be given a diameter almost the same as the circumference of the plasma generator nose 2. The sealing ring 13 can be given a diameter almost the same as the circumference of the plasma generator nose 2. The sealing ring 13 may be made of metal (red metal) to prevent it being damaged by spot and waste deposits on the generator nose when the plasma generator is extracted from the tuyère.
The sealing ring 13 may if desired be made of a material which is at least partially resilient and has a low friction coefficient, e.g. polytetrafluoroethylene. Giving the sealing ring an enlarged inlet end 20 further facilitates introduction of the plasma generator in the tuyère. Examples of suitable protective gases in this connection are nitrogen and argon.
The sealing arrangement according to the invention thus completely prevents any leakage of the contents of the reactor during connection of the plasma generator to it. Instead, protective gas will be released, and will, to a certain extent, migrate into the reactor. However, the flow into the reactor can be minimized by careful adjustment of the protective gas pressure so that it is only slightly in excess of the pressure prevailing in the reactor.

Claims (11)

1. Means for sealing a reactor during connection of a burner to a reactor tuyère, comprising a sealing ring adapted to be arranged in a seat at the connection between the burner and the reactor tuyère, said seaing ring having openings for the introduction of protective gas.
2. Sealing means according to claim 1, wherein the sealing ring is provided with a chamfered inlet opening
3. Sealing means according to claim 1 or 2, wherein the openings for the supply of protective gas are provided in a groove on the inwardly facing surface of the sealing ring.
4. Sealing means according to claims 1 to 3, wherein the sealing ring is made of red metal.
5. Sealing means according to claims 1 to 3, wherein the sealing ring is made of polytetrafluoroethylene.
6. A reactor tuyere including sealing means according to any one of claims 1 to 5, wherein the seat for the sealing ring includes an annular flange secured by means of bolts.
7. A burner fitted with sealing means according to any one of claims 1 to 5, wherein the sealing ring is adapted to fit tightly to the part of the plasma generator which is to be inserted.
8. A burner according to claim 7, when in the form of a plasma generator.
9. A shaft furnace for metal oxide reduction, fitted with a burner by means of the sealing means specified in any one of claims 1 to 7.
10. Means for sealing a reactor, substantially as hereinbefore described with reference to, and as illustrated in, the accompanying drawing.
Superseded claim 10 New or amended claims:- 10 and 11
10. Means for sealing a working reactor during the connection of a plasma generator to a reactor tuyère, comprising a sealing ring adapted to be arranged in a seat at the connection between the plasma generator and the reactor tuyère, said sealing ring having openings for the introduction of protective gas, and a valve, arranged to be opened when the plasma generator is inserted into the sealing ring.
11. Means for sealing a reactor, substantially as hereinbefore described with reference to, and as illustrated in, the accompanying drawing.
GB08406905A 1983-11-07 1984-03-16 Sealing means for burner/reactor Withdrawn GB2149629A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8306107A SE8306107D0 (en) 1983-11-07 1983-11-07 TETNINGSANORDNING

Publications (2)

Publication Number Publication Date
GB8406905D0 GB8406905D0 (en) 1984-04-18
GB2149629A true GB2149629A (en) 1985-06-12

Family

ID=20353207

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08406905A Withdrawn GB2149629A (en) 1983-11-07 1984-03-16 Sealing means for burner/reactor

Country Status (19)

Country Link
JP (1) JPS60103290A (en)
KR (1) KR850003829A (en)
AU (1) AU2619284A (en)
BE (1) BE899233A (en)
BR (1) BR8401810A (en)
DD (1) DD217393A5 (en)
DE (1) DE3407997A1 (en)
ES (1) ES286510Y (en)
FI (1) FI840819A (en)
FR (1) FR2554664A1 (en)
GB (1) GB2149629A (en)
IT (1) IT1175452B (en)
NL (1) NL8400681A (en)
NO (1) NO840827L (en)
PL (1) PL246901A1 (en)
PT (1) PT78234A (en)
SE (1) SE8306107D0 (en)
ZA (1) ZA842285B (en)
ZW (1) ZW4884A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2167843A (en) * 1984-12-03 1986-06-04 Skf Steel Eng Ab Sealing means for burners/reactors

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB642125A (en) * 1946-02-01 1950-08-30 Rune Billgren Blast-preheater
GB1068174A (en) * 1963-02-22 1967-05-10 Ass Elect Ind Improvements relating to electric furnaces
GB1253298A (en) * 1968-01-16 1971-11-10 Union Carbide Corp Method and apparatus for shielding a gas effluent
GB1435793A (en) * 1972-10-06 1976-05-12 Commissariat Energie Atomique Rotary furnace of the plasma-arc heating type
GB1478778A (en) * 1974-12-16 1977-07-06 Allis Chalmers Seal for a rotary kiln
GB1488976A (en) * 1974-03-29 1977-10-19 Centre Rech Metallurgique Apparatus for injecting hot reducing gas into a shaft furnace
GB1543967A (en) * 1975-04-17 1979-04-11 Gen Atomic Co Nozzle for a plasma arc welding or cutting torch
GB1574752A (en) * 1976-05-24 1980-09-10 Btu Eng Corp High temperature furnaces
GB2048026A (en) * 1979-04-23 1980-12-03 Westinghouse Electric Corp Arc heater melting system
GB1597559A (en) * 1977-04-27 1981-09-09 Metco Inc Plasma spray coating
GB2114408A (en) * 1981-11-20 1983-08-17 Coated Electrodes Ltd Apparatus for sealing electrodes in electric arc furnaces

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB639071A (en) * 1947-10-30 1950-06-21 Shell Refining & Marketing Co Improvements in or relating to vessels, chambers, or the like apparatus operating under pressure
US2823629A (en) * 1955-06-13 1958-02-18 Combustion Eng Closure means including fluid screen for access passageway into pressurized furnace and the like

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB642125A (en) * 1946-02-01 1950-08-30 Rune Billgren Blast-preheater
GB1068174A (en) * 1963-02-22 1967-05-10 Ass Elect Ind Improvements relating to electric furnaces
GB1253298A (en) * 1968-01-16 1971-11-10 Union Carbide Corp Method and apparatus for shielding a gas effluent
GB1435793A (en) * 1972-10-06 1976-05-12 Commissariat Energie Atomique Rotary furnace of the plasma-arc heating type
GB1488976A (en) * 1974-03-29 1977-10-19 Centre Rech Metallurgique Apparatus for injecting hot reducing gas into a shaft furnace
GB1478778A (en) * 1974-12-16 1977-07-06 Allis Chalmers Seal for a rotary kiln
GB1543967A (en) * 1975-04-17 1979-04-11 Gen Atomic Co Nozzle for a plasma arc welding or cutting torch
GB1574752A (en) * 1976-05-24 1980-09-10 Btu Eng Corp High temperature furnaces
GB1597559A (en) * 1977-04-27 1981-09-09 Metco Inc Plasma spray coating
GB2048026A (en) * 1979-04-23 1980-12-03 Westinghouse Electric Corp Arc heater melting system
GB2114408A (en) * 1981-11-20 1983-08-17 Coated Electrodes Ltd Apparatus for sealing electrodes in electric arc furnaces

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2167843A (en) * 1984-12-03 1986-06-04 Skf Steel Eng Ab Sealing means for burners/reactors

Also Published As

Publication number Publication date
PL246901A1 (en) 1985-06-04
NL8400681A (en) 1985-06-03
ES286510Y (en) 1986-06-01
IT1175452B (en) 1987-07-01
BR8401810A (en) 1985-06-11
NO840827L (en) 1985-05-08
AU2619284A (en) 1985-05-16
ZA842285B (en) 1985-11-27
BE899233A (en) 1984-07-16
FI840819A (en) 1985-05-08
ES286510U (en) 1985-12-16
SE8306107D0 (en) 1983-11-07
IT8419977A0 (en) 1984-03-09
GB8406905D0 (en) 1984-04-18
DD217393A5 (en) 1985-01-09
KR850003829A (en) 1985-06-26
FR2554664A1 (en) 1985-05-10
PT78234A (en) 1984-04-01
ZW4884A1 (en) 1984-08-08
JPS60103290A (en) 1985-06-07
FI840819A0 (en) 1984-03-01
DE3407997A1 (en) 1985-05-23

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Legal Events

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)