US3732993A - Seal for tower furnace - Google Patents
Seal for tower furnace Download PDFInfo
- Publication number
- US3732993A US3732993A US00172490A US3732993DA US3732993A US 3732993 A US3732993 A US 3732993A US 00172490 A US00172490 A US 00172490A US 3732993D A US3732993D A US 3732993DA US 3732993 A US3732993 A US 3732993A
- Authority
- US
- United States
- Prior art keywords
- cover plate
- feed slot
- furnace
- feed
- trough
- 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
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B1/00—Shaft or like vertical or substantially vertical furnaces
- F27B1/005—Shaft or like vertical or substantially vertical furnaces wherein no smelting of the charge occurs, e.g. calcining or sintering furnaces
Definitions
- the present invention relates to tower furnaces, and more particularly to a seal between the upper end of such a furnace and a reciprocating member in which feed orifices are formed.
- raw material in the form of small particles is dropped through the furnace. As the particles are falling they are heated to fusion temperature and bloated.
- the furnace is controlled in such a manner that the chamber through which the particles fall is substantially free from turbulence.
- a reciprocating cover plate having feed orifices therein.
- the cover plate is provided with a depending skirt that extends into and is movable in an annular trough which surrounds the top of the furnace. This trough is filled with a sealing liquid which prevents leakage of furnace gases as the cover plate is reciprocated.
- a tower furnace which may be generally of the type shown in Blaha US. Pat. No. 3,056,184 which forms a vertically extending furnace chamber 2.
- the walls of the furnace are provided with a series of rows of burners 3 by which the furnace is heated.
- the upper end of the furnace is provided with an elongated slot 4 through which the particles to be heated are dropped into the furnace where they fall and are bloated as they fall.
- Material to be heated which is usually a granular, clay-like material, is fed through a cover plate 5 formed of refractory material supported by a metallic frame 6 that is provided with an extension 7 on each end thereof.
- Cover plate 5 is provided with a row of feed orifices 9 immediately above and aligned with feed slot 4.
- the particulate material is fed to orifices 9 through flexible tubes 11 that are supplied from a hopper 12. These tubes are held in position over the respective orifices by means of fixtures 13 fastened to the frame of the cover plate.
- the cover plate with its orifices and the feed tubes are reciprocated along the length of the feed slot by means including a constant speed, reversible motor 14 mounted on a suitable frame 15. This motor drives a threaded shaft 16 journaled in and held from axial movement by bearings 17.
- a sleeve 18 is reciprocated along shaft 16 as it is rotated, with the sleeve being connected by an arm 19 to one of the extensions 7.
- Motor 14 is operated to reciprocate the cover plate by a projection 19 on sleeve 18 that actuates one or the other of a pair of limit switches 22.
- a limit switch When a limit switch is actuated it operates in a conventional manner to reverse the motor thereby to cause sleeve 18 and the parts attached thereto to move in an opposite direction.
- a seal for this purpose includes a skirt 23 extending down wardly from the frame 6 and around the upper end of the furnace. This skirt extends into a rectangular trough 24 that is mounted on the upper end of the furnace structure 1 and around the feed slot 4. It will be noticed from FIG. 2 that the sides of this trough are relatively narrow while FIG. 1 shows that the ends of the trough are wide enough to accommodate movement of skirt 23 throughout the maximum length of reciprocation of the cover plate.
- a suitable sealing liquid which may well be water, is supplied to the trough 24 through a supply pipe 25 that has a regulating valve therein.
- the liquid rises to a level in the trough that is above the lower edge of skirt 23 with the level being controlled by the height of a pair of dams 26 at each end of the trough. Sealing liquid overflowing from the trough as a result of continual feed of the liquid and as a result of any splashing that may occur as the skirt 23 moves slowly back and forth, goes out through drains 27.
- a tower furnace the combination of structure forming a vertically extending furnace chamber having an upper end, said structure being formed with an elongated feed slot opening into the upper end of said chamber, a cover plate located substantially horizontally above said feed slot and covering the entire slot, said plate being provided with a plurality of feed orifices aligned with and over said feed slot in any position of said cover plate, means to reciprocate said cover plate thereby to move said feed orifices back and forth along said feed slot, and means to form a gas tight seal between the upper end of said structure entirely around said feed slot and said reciprocating cover plate.
- said means to form a gas tight seal comprises means forming a trough that extends around said feed slot adjacent to the upper end of said structure, said cover plate being provided with a skirt extending downwardly into said trough around said feed slot, and a sealing liquid in said trough to a level above the bottom of said skirt.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Furnace Details (AREA)
Abstract
Description
Claims (3)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US17249071A | 1971-08-17 | 1971-08-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3732993A true US3732993A (en) | 1973-05-15 |
Family
ID=22627913
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00172490A Expired - Lifetime US3732993A (en) | 1971-08-17 | 1971-08-17 | Seal for tower furnace |
Country Status (1)
Country | Link |
---|---|
US (1) | US3732993A (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3860224A (en) * | 1973-10-19 | 1975-01-14 | Eveleth Taconite Company | Apparatus for use in pelletizing ore |
US4264351A (en) * | 1978-01-12 | 1981-04-28 | Sorg Gmbh & Co. Kg | Glass melting furnace |
US4286912A (en) * | 1978-04-12 | 1981-09-01 | Didier Engineering Gmbh | Process and apparatus for charging and sealing a charging port of a chamber |
US4326556A (en) * | 1979-03-08 | 1982-04-27 | Waagner-Biro Aktiengesellschaft | Apparatus for sealing the periphery of an opening |
US4334859A (en) * | 1978-07-20 | 1982-06-15 | Susumu Minegishi | Method and apparatus for melting matrix materials |
US4545135A (en) * | 1982-04-29 | 1985-10-08 | Barriquand | Installations for spin-drying fibrous or porous materials |
US4986516A (en) * | 1988-12-30 | 1991-01-22 | Paul Wurth S.A. | Sealing shutter for a shaft furnace |
US5009398A (en) * | 1988-12-30 | 1991-04-23 | Paul Wrth S.A. | Device for reducing the stresses on a sealing shutter |
US6032828A (en) * | 1997-10-20 | 2000-03-07 | Arbo Engineering Inc. | Catalyst exchange device |
CN101738095B (en) * | 2008-11-21 | 2012-06-27 | 中冶长天国际工程有限责任公司 | Air inlet system for circular cooler and annular air passage and annular liquid tank |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US552372A (en) * | 1895-12-31 | Smelting-furnace |
-
1971
- 1971-08-17 US US00172490A patent/US3732993A/en not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US552372A (en) * | 1895-12-31 | Smelting-furnace |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3860224A (en) * | 1973-10-19 | 1975-01-14 | Eveleth Taconite Company | Apparatus for use in pelletizing ore |
US4264351A (en) * | 1978-01-12 | 1981-04-28 | Sorg Gmbh & Co. Kg | Glass melting furnace |
US4286912A (en) * | 1978-04-12 | 1981-09-01 | Didier Engineering Gmbh | Process and apparatus for charging and sealing a charging port of a chamber |
US4334859A (en) * | 1978-07-20 | 1982-06-15 | Susumu Minegishi | Method and apparatus for melting matrix materials |
US4326556A (en) * | 1979-03-08 | 1982-04-27 | Waagner-Biro Aktiengesellschaft | Apparatus for sealing the periphery of an opening |
US4545135A (en) * | 1982-04-29 | 1985-10-08 | Barriquand | Installations for spin-drying fibrous or porous materials |
US4986516A (en) * | 1988-12-30 | 1991-01-22 | Paul Wurth S.A. | Sealing shutter for a shaft furnace |
US5009398A (en) * | 1988-12-30 | 1991-04-23 | Paul Wrth S.A. | Device for reducing the stresses on a sealing shutter |
US6032828A (en) * | 1997-10-20 | 2000-03-07 | Arbo Engineering Inc. | Catalyst exchange device |
CN101738095B (en) * | 2008-11-21 | 2012-06-27 | 中冶长天国际工程有限责任公司 | Air inlet system for circular cooler and annular air passage and annular liquid tank |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: FIRST PENNSYLVANIA BANK N A 19TH FL.CENTRE SQ WEST Free format text: SECURITY INTEREST;ASSIGNOR:SELAS CORPORATION OF AMERICA A CORP OF PA;REEL/FRAME:003997/0981 Effective date: 19820217 |
|
AS | Assignment |
Owner name: SELAS CORPORATION OF AMERICA A CORP. OF PA Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:FIRST PENNSYLVANIA BANK N.V., FOR ITSELF AND AS AGENT FOR THE PHILADELPHIA NATIONAL BANK;REEL/FRAME:004096/0520 Effective date: 19821231 |
|
AS | Assignment |
Owner name: BANCBOSTON FINANCIAL COMPANY,MASSACHUSETTS Free format text: SECURITY INTEREST;ASSIGNOR:SELAS CORPORATION OF AMERICA;REEL/FRAME:004557/0143 Effective date: 19860529 Owner name: BANCBOSTON FINANCIAL COMPANY, 100 FEDERAL STREET, Free format text: SECURITY INTEREST;ASSIGNOR:SELAS CORPORATION OF AMERICA;REEL/FRAME:004557/0143 Effective date: 19860529 |
|
AS | Assignment |
Owner name: SELAS CORPORATION OF AMERICA, PENNSYLVANIA Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:BANCBOSTON FINANACIAL COMPANY A MA TRUST;REEL/FRAME:004945/0988 Effective date: 19880805 Owner name: SELAS CORPORATION OF AMERICA, DRESHER, PA 19025 A Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:BANCBOSTON FINANACIAL COMPANY A MA TRUST;REEL/FRAME:004945/0988 Effective date: 19880805 |