[go: up one dir, main page]

US3724887A - Kiln seal - Google Patents

Kiln seal Download PDF

Info

Publication number
US3724887A
US3724887A US00144461A US3724887DA US3724887A US 3724887 A US3724887 A US 3724887A US 00144461 A US00144461 A US 00144461A US 3724887D A US3724887D A US 3724887DA US 3724887 A US3724887 A US 3724887A
Authority
US
United States
Prior art keywords
seal
stationary
kiln
mounting means
rotating
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
Application number
US00144461A
Inventor
E Roberts
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.)
Treadwell Corp
Original Assignee
Treadwell Corp
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 Treadwell Corp filed Critical Treadwell Corp
Application granted granted Critical
Publication of US3724887A publication Critical patent/US3724887A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories or equipment specially adapted for rotary-drum furnaces
    • F27B7/22—Rotary drums; Supports therefor
    • F27B7/24—Seals between rotary and stationary parts

Definitions

  • Rotary kilns of this type may be extremely large, and may reach diameters of 15 feet or more and lengths of over 20 feet. Since the kiln end plate may be subject to considerable thermal expansion and contraction with consequent movement of the axis of rotation, sealing between the relatively moving parts becomes a difiicult problem.
  • Various solutions have been proposed such as that of US. Pat. No. 1,460,764 involving the use of a stuffing box having resiliently biased packing rings or the use of a movable sealing ring proposed in US. Pat. No. 1,794,454.
  • none of these seals solves in an entirely satisfactory manner, the complex problem of sealing large rotating kilns about an axis which is variable in position due to thermal expansion and contraction of the kiln.
  • an end seal for a rotary kiln comprises a first seal assembly or portion which is fixedly secured to and rotatable with the kiln inlet and a second seal assembly which is stationary with respect to the kiln and the rotary seal assembly.
  • the stationary seal assembly has connected to it a plurality of rollers which support and center this seal assembly relative to the axis of the rotation of the kiln.
  • an annular seal element secured to the rotary portion of the seal and maintained in close sealing contact with the stationary portion of the seal by spring mounted shoe means.
  • FIG. 1 is a side elevation of a rotary kiln incorporating the seal of the present invention.
  • FIG. 2 is a cross-section of essential parts of the seal of the present invention.
  • the kiln 10 is of the conventional cylindrical drum type having a refractory lining and internal gas-fired heating means (not shown).
  • the kiln is supported at each end upon rollers 11 joumalled in trunnions 12, the rollers engaging circumferential ring supports 13. Rotation of the kiln 10 is accomplished by a motor 15 which drives the pinion l6 engaging a bull gear 17 secured to the kiln.
  • Inlet and outlet housings 18 and 18 enclose respective feed and outlet transport mechanisms (not shown) for supplying the kiln with raw material and for withdrawing processed material therefrom.
  • Seals 19 constructed according to the present invention are located about both the inlet and outlet of the kiln, the construction and function of which will now be described.
  • FIG. 2 a portion of an end plate 20 of the kiln 10 has been illustrated.
  • the plate 20 is connected by suitable welding 20a to a generally cylindrical member 21 which defines the feed inlet opening to the kiln.
  • the member 21 has its axis coincident with the axis of rotation of the kiln 10.
  • Reinforcement 22 is secured to member 21 for strength and stiffening.
  • a cylindrical member 27 extends outside and parallel to inlet member 21 and is welded at 27a to plate 23. Cylindrical member 27 is further secured to the end of inlet member 21 through intermediate support 28 by the welds shown at 28a.
  • a seal mount 29 is welded to the cylinder 27. Secured to said seal mount by means of threaded studs 30, nuts 31 and washer 32 is a flat annular seal element 33.
  • the seal element 33 is advantageously of a suitable longwearing, tough sheet material comprising fabric impregnated with teflon.
  • roller 26 are rigidly secured to the inlet member 21 and rotate with the kiln.
  • the stationary portions of the seal will now be described. These include plate 36 which is connected by means of a flexible corrugated connection 36a or other flexible means in sealed relation to housing 18 for a feed mechanism (not shown).
  • the plate 36 is fastened to an annular ring 38 by studs or bolts 39.
  • Washer seal 40 prevents leakage between the plate 36 and ring 38.
  • Another and opposing ring 41 extends radially outwardly and is slotted at 41a to receive the shaft 42a of roller 26, which is attached to slidable block mount 42b.
  • Three such centering rollers 26 advantageously are provided equally spaced about the periphery of plate 23.
  • the roller 26 can be adjusted radially by means of a screw 44 which is threaded through a nut 41b secured to the periphery of the ring 41 and which bears upon block 42b. Lock nut 47 prevents rotation of screw 44 once the positioning of the roller 26 has been made.
  • the ring 41 is held against rotation (see FIG. 1) by an arm 48 engaging a stationary stop to prevent rotation of the ring 41 and of the elements connected thereto.
  • annular member 50 (U-shaped in cross-section) secured by studs or bolts 51 to ring 41 and by like studs or bolts (not shown) to ring 38, and maintained in sealing relation to members 38 and 41 by seals 53 and 54.
  • the ring members 38 and 41 are provided with facing axially extruding flanges 38a and 41a which are grooved for receiving O-rings 55 and 56. These provide a seal between the members 38 and 41 and between two opposing shoes 57 and 58 which are urged toward each other and against the opposite faces of the seal 33 by springs 59 and 60. Oil under pressure may if desired be introduced into the annular space about the shoes 57, 58 through an inlet 61 to lubricate the seal and by its pressure on the shoes to aid in holding them against the seal element 33.
  • the invention further provides a wiper sealing element 62 secured to the ring 38 by studs and washer combination 62.
  • the purpose of wiper element 62 is to prevent the dust from the housing 18 or kiln from penetrating into the interior of the seal.
  • a positive gas pressure may be maintained within the seal by conducting a gas at above atmospheric pressure through the conduit 64 which opens to the interionof the seal at 64a.
  • each of the rollers 26 is first adjusted radially by setting screws 44 to bring rollers 26 into close contact with section 24 of plate 23.
  • the stationary parts of the seal connected to ring41 are centered with respect to the kiln axis of rotation as determined by the circumference of section 24 which is a coincident reference extension of such axis.
  • the end wall 20 of the kiln may expand or contract due to thermal forces, thereby raising or lowering the axis of rotation of the kiln.
  • the stationary portions of the seal 19 due to the interconnection through rollers 26 to the rotating portions, will continue to be centered with respect to the rotational axis of kiln 19.
  • Effects of thermal expansion or contraction of the seal elements themselves are minimized, since both the stationary and rotating portions of the seal are connected directly or indirectly to the inlet member 21 which in turn is quite close to the rotational axis of the kiln.
  • the seal elements are therefore divorced substantially from the large thermal expansion and contraction to which the kiln proper is subject.
  • a sea] for a rotary kiln having nozzle means defining an opening therein comprising a movable seal portion fixedly attached to said nozzle for rotation therewith, seal mounting means in said movable seal portion, a stationary seal portion, seal mounting means in said stationary portion, a seal element in sealing engagement with each mounting means, one of said seal mounting means permitting relative movement of said seal element between said rotating and stationary seal portions, and centering means comprising a circular plate connected to said rotation portion of the seal and extending perpendicular to the kiln axis, said stationary seal portion including a plurality of rollers contacting the periphery of said plate to transmit to said stationary seal portion radial movements of said rotating seal portion.
  • one seal element is an annular member of flexible wear-resistant sheet material secured to one of the seal mounting means and the other seal element comprises a pair of opposed annular shoes secured to the other seal mounting means and pressing against opposite faces of said flexible sheet material,
  • a seal for a rotary kiln having nozzle means defining an opening therein comprising a movable seal portion fixedly attached to said nozzle for rotation therewith, seal mounting means in said movable seal portion, a stationary seal portion, seal mounting means in said stationary portion, a seal element in sealing engagement with each mounting means, one of said seal mounting means permitting relative movement of said seal element between said rotating and stationary seal portions, means for maintaining said stationary seal portion in central relation to the axis of rotation of said kiln despite displacement of said axis with contraction and expansion of said kiln, a stationary housing for a kiln feed mechanism, and the like, and an inlet nozzle to said kiln, a part of the stationary portion of said seal being flexibly mounted to said housing for sealing the area between said housing and said inlet nozzle, the remainder of said stationary seal portion being connected to rollers which roll on the peripheral edge of a circular member which is fixed to, and substantially concentric with, said kiln, each of said stationary seal parts mounting one of

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Furnace Details (AREA)

Abstract

An end seal for a rotary kiln having axial-reference centering means.

Description

United States Patent 1191 Roberts 1451 Apr. 3, 1973 KILN SEAL [56] References Cited [75] Inventor: Edward S. Roberts, New York, NY. FOREIGN PATENTS OR APPLICATIONS [7 3] Assignee: Trea well Corpo tion, ew York, 1,201,999 1/1960 France ..263/32 NY. Filedl y 1971 Primary Examiner-John J. Camby [21] APPL No; 144,461 Attorney-Fannie, Edmonds, Morton, Taylor 8c Adams [52] US. Cl. ..287/l89.36, 34/242, 432/115 [57] ABSTRACT [51] Int. Cl ..F27b 7/24 An end seal for a rotary kiln having axial-reference [58] Field of Search ..263/32 R, 33 R; 34/242 nterin means,
6 Claims, 2 Drawing Figures PATENTEUAPM r915 3.724 887 INVENTOR.
EDWARD S. ROBERTS g mg/jwam ATTORNEYS KILN SEAL BACKGROUND OF THE INVENTION Rotary kilns frequently require that an effective seal be maintained between stationary apparatus through which the kiln is fed or discharged and the rotating kiln itself. Such is necessary, for example, when an ap- I propriate atmosphere must be maintained within the kiln while the material therein is heated and processed.
Rotary kilns of this type may be extremely large, and may reach diameters of 15 feet or more and lengths of over 20 feet. Since the kiln end plate may be subject to considerable thermal expansion and contraction with consequent movement of the axis of rotation, sealing between the relatively moving parts becomes a difiicult problem. Various solutions have been proposed such as that of US. Pat. No. 1,460,764 involving the use of a stuffing box having resiliently biased packing rings or the use of a movable sealing ring proposed in US. Pat. No. 1,794,454. However, none of these seals solves in an entirely satisfactory manner, the complex problem of sealing large rotating kilns about an axis which is variable in position due to thermal expansion and contraction of the kiln.
It is the purpose of the present invention to provide a solution to this problem.
SUMMARY OF THE INVENTION In accordance with the present invention, an end seal for a rotary kiln comprises a first seal assembly or portion which is fixedly secured to and rotatable with the kiln inlet and a second seal assembly which is stationary with respect to the kiln and the rotary seal assembly. The stationary seal assembly has connected to it a plurality of rollers which support and center this seal assembly relative to the axis of the rotation of the kiln. Between the stationary and rotary portions of the seal is an annular seal element secured to the rotary portion of the seal and maintained in close sealing contact with the stationary portion of the seal by spring mounted shoe means.
BRIEF DESCRIPTION OF THE DRAWING FIG. 1 is a side elevation of a rotary kiln incorporating the seal of the present invention; and
FIG. 2 is a cross-section of essential parts of the seal of the present invention.
DESCRIPTION OF A PREFERRED EMBODIMENT With reference to the drawing and initially to FIG. 1 thereof, a rotary kiln incorporating the kiln seal of the invention has been illustrated. The kiln 10 is of the conventional cylindrical drum type having a refractory lining and internal gas-fired heating means (not shown). The kiln is supported at each end upon rollers 11 joumalled in trunnions 12, the rollers engaging circumferential ring supports 13. Rotation of the kiln 10 is accomplished by a motor 15 which drives the pinion l6 engaging a bull gear 17 secured to the kiln. Inlet and outlet housings 18 and 18 enclose respective feed and outlet transport mechanisms (not shown) for supplying the kiln with raw material and for withdrawing processed material therefrom. Seals 19 constructed according to the present invention are located about both the inlet and outlet of the kiln, the construction and function of which will now be described.
With reference to FIG. 2, a portion of an end plate 20 of the kiln 10 has been illustrated. The plate 20 is connected by suitable welding 20a to a generally cylindrical member 21 which defines the feed inlet opening to the kiln. The member 21 has its axis coincident with the axis of rotation of the kiln 10. Reinforcement 22 is secured to member 21 for strength and stiffening. Extending generally perpendicularly from the member 21 and welded thereto, is a large circular pate 23 (apertured for weight reduction) having an outer section 24 which has beveled machined edges 24a. This permits a plurality of centering rollers 26 having similarly inclined machined surfaces 26a to ride thereuponfor reasons which will be described.
A cylindrical member 27 extends outside and parallel to inlet member 21 and is welded at 27a to plate 23. Cylindrical member 27 is further secured to the end of inlet member 21 through intermediate support 28 by the welds shown at 28a. A seal mount 29 is welded to the cylinder 27. Secured to said seal mount by means of threaded studs 30, nuts 31 and washer 32 is a flat annular seal element 33. The seal element 33 is advantageously of a suitable longwearing, tough sheet material comprising fabric impregnated with teflon.
Thus far the elements described with exception of the roller 26 are rigidly secured to the inlet member 21 and rotate with the kiln.
The stationary portions of the seal will now be described. These include plate 36 which is connected by means of a flexible corrugated connection 36a or other flexible means in sealed relation to housing 18 for a feed mechanism (not shown). The plate 36 is fastened to an annular ring 38 by studs or bolts 39. Washer seal 40 prevents leakage between the plate 36 and ring 38. Another and opposing ring 41 extends radially outwardly and is slotted at 41a to receive the shaft 42a of roller 26, which is attached to slidable block mount 42b. Three such centering rollers 26 advantageously are provided equally spaced about the periphery of plate 23. The roller 26 can be adjusted radially by means of a screw 44 which is threaded through a nut 41b secured to the periphery of the ring 41 and which bears upon block 42b. Lock nut 47 prevents rotation of screw 44 once the positioning of the roller 26 has been made. The ring 41 is held against rotation (see FIG. 1) by an arm 48 engaging a stationary stop to prevent rotation of the ring 41 and of the elements connected thereto.
Intermediate the ring members 41 and 38 is an annular member 50 (U-shaped in cross-section) secured by studs or bolts 51 to ring 41 and by like studs or bolts (not shown) to ring 38, and maintained in sealing relation to members 38 and 41 by seals 53 and 54. Near their inner peripheries, the ring members 38 and 41 are provided with facing axially extruding flanges 38a and 41a which are grooved for receiving O- rings 55 and 56. These provide a seal between the members 38 and 41 and between two opposing shoes 57 and 58 which are urged toward each other and against the opposite faces of the seal 33 by springs 59 and 60. Oil under pressure may if desired be introduced into the annular space about the shoes 57, 58 through an inlet 61 to lubricate the seal and by its pressure on the shoes to aid in holding them against the seal element 33.
The invention further provides a wiper sealing element 62 secured to the ring 38 by studs and washer combination 62. The purpose of wiper element 62 is to prevent the dust from the housing 18 or kiln from penetrating into the interior of the seal. To further preclude such possibility, a positive gas pressure may be maintained within the seal by conducting a gas at above atmospheric pressure through the conduit 64 which opens to the interionof the seal at 64a.
The operation of the kiln seal is as follows: Each of the rollers 26 is first adjusted radially by setting screws 44 to bring rollers 26 into close contact with section 24 of plate 23. Thus, the stationary parts of the seal connected to ring41 are centered with respect to the kiln axis of rotation as determined by the circumference of section 24 which is a coincident reference extension of such axis.
The end wall 20 of the kiln may expand or contract due to thermal forces, thereby raising or lowering the axis of rotation of the kiln. However throughout such expansion and contraction the stationary portions of the seal 19, due to the interconnection through rollers 26 to the rotating portions, will continue to be centered with respect to the rotational axis of kiln 19. Effects of thermal expansion or contraction of the seal elements themselves are minimized, since both the stationary and rotating portions of the seal are connected directly or indirectly to the inlet member 21 which in turn is quite close to the rotational axis of the kiln. The seal elements are therefore divorced substantially from the large thermal expansion and contraction to which the kiln proper is subject.
It will be understood that the foregoing description has related to a particular embodiment of the invention and is therefore only representative. In order to appreciate fully the scope of the invention reference should be made to the appended claims.
What is claimed is:
l. A sea] for a rotary kiln having nozzle means defining an opening therein comprising a movable seal portion fixedly attached to said nozzle for rotation therewith, seal mounting means in said movable seal portion, a stationary seal portion, seal mounting means in said stationary portion, a seal element in sealing engagement with each mounting means, one of said seal mounting means permitting relative movement of said seal element between said rotating and stationary seal portions, and centering means comprising a circular plate connected to said rotation portion of the seal and extending perpendicular to the kiln axis, said stationary seal portion including a plurality of rollers contacting the periphery of said plate to transmit to said stationary seal portion radial movements of said rotating seal portion. 7
2. The seal according to claim 1 wherein said inlet nozzle is rigidly and perpendicularly secured to said rotating plate, said stationary seal portion includes a member extending parallel to said rotating plate mounting said rollers and means for adjusting said rollers radially with respect to said rotating plate.
3. The seal according to claim 1 wherein one seal element is an annular member of flexible wear-resistant sheet material secured to one of the seal mounting means and the other seal element comprises a pair of opposed annular shoes secured to the other seal mounting means and pressing against opposite faces of said flexible sheet material,
4. The seal according to claim 3 wherein said stationary seal portion supports the opposing shoe elements in fluid-tight engagement therewith, spring means maintain said shoes in contact with said flexible seal element, and means secure said flexible seal element in fluid-tight engagement with said rotating seal portion.
5. A seal for a rotary kiln having nozzle means defining an opening therein comprising a movable seal portion fixedly attached to said nozzle for rotation therewith, seal mounting means in said movable seal portion, a stationary seal portion, seal mounting means in said stationary portion, a seal element in sealing engagement with each mounting means, one of said seal mounting means permitting relative movement of said seal element between said rotating and stationary seal portions, means for maintaining said stationary seal portion in central relation to the axis of rotation of said kiln despite displacement of said axis with contraction and expansion of said kiln, a stationary housing for a kiln feed mechanism, and the like, and an inlet nozzle to said kiln, a part of the stationary portion of said seal being flexibly mounted to said housing for sealing the area between said housing and said inlet nozzle, the remainder of said stationary seal portion being connected to rollers which roll on the peripheral edge of a circular member which is fixed to, and substantially concentric with, said kiln, each of said stationary seal parts mounting one of said opposing shoe elements.
6. The seal according to claim 5 wherein a wiper seal is provided between the rotating seal portion and said stationary portion, and means are provided for introducing between said stationary and rotating seal portions and said seal element and said wiper seal a gaseous atmosphere at a positive pressure within said seal.

Claims (6)

1. A seal for a rotary kiln having nozzle means defining an opening therein comprising a movable seal portion fixedly attached to said nozzle for rotation therewith, seal mounting means in said movable seal portion, a stationary seal portion, seal mounting means in said stationary portion, a seal element in sealing engagement with each mounting means, one of said seal mounting means permitting relative movement of said seal element between said rotating and stationary seal portions, and centering means comprising a circular plate connected to said rotation portion of the seal and extending perpendicular to the kiln axis, said stationary seal portion including a plurality of rollers contacting the periphery of said plate to transmit to said stationary seal portion radial movements of said rotating seal portion.
2. The seal according to claim 1 wherein said inlet nozzle is rigidly and perpendicularly secured to said rotating plate, said stationary seal portion includes a member extending parallel to said rotating plate mounting said rollers and means for adjusting said rollers radially with respect to said rotating plate.
3. The seal according to claim 1 wherein one seal element is an annular member of flexible wear-resistant sheet material secured to one of the seal mounting means and the other seal element comprises a pair of opposed annular shoes secured to the other seal mounting means and pressing against opposite faces of said flexible sheet material.
4. The seal according to claim 3 wherein said stationary seal portion supports the opposing shoe elements in fluid-tight engagement therewith, spring means maintain said shoes in contact with said flexible seal element, and means secure said flexible seal element in fluid-tight engagement with said rotating seal portion.
5. A seal for a rotary kiln having nozzle means defining an opening therein comprising a movable seal portion fixedly attached to said nozzle for rotation therewith, seal mounting means in said movable seal portion, a stationary seal portion, seal mounting means in said stationary portion, a seal element in sealing engagement with each mounting means, one of said seal mounting means permitting relative movement of said seal element between said rotating and stationary seal portions, means for maintaining said stationary seal portion in central relation to the axis of rotation of said kiln despite displacement of said axis with contraction and expansion of said kiln, a stationary housing for a kiln feed mechanism, and the like, and an inlet nozzle to said kiln, a part of the stationary portion of said seal being flexibly mounted to said housing for sealing the area between said housing and said inlet nozzle, the remainder of said stationary seal portion being connected to rollers which roll on the peripheral edge of a circular member which is fixed to, and substantially concentric with, said kiln, each of said stationary seal parts mounting one of said opposing shoe elements.
6. The seal according to claim 5 whereiN a wiper seal is provided between the rotating seal portion and said stationary portion, and means are provided for introducing between said stationary and rotating seal portions and said seal element and said wiper seal a gaseous atmosphere at a positive pressure within said seal.
US00144461A 1971-05-18 1971-05-18 Kiln seal Expired - Lifetime US3724887A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US14446171A 1971-05-18 1971-05-18

Publications (1)

Publication Number Publication Date
US3724887A true US3724887A (en) 1973-04-03

Family

ID=22508695

Family Applications (1)

Application Number Title Priority Date Filing Date
US00144461A Expired - Lifetime US3724887A (en) 1971-05-18 1971-05-18 Kiln seal

Country Status (1)

Country Link
US (1) US3724887A (en)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3940239A (en) * 1974-12-16 1976-02-24 Allis-Chalmers Corporation Rotary reducing kiln seal
US4087334A (en) * 1976-10-04 1978-05-02 Dravo Corporation Seal arrangement for a rotary drum assembly
US4193756A (en) * 1978-03-08 1980-03-18 Tosco Corporation Seal assembly and method for providing a seal in a rotary kiln
US4199154A (en) * 1976-07-28 1980-04-22 Stauffer Chemical Company Labyrinth sealing system
FR2501844A1 (en) * 1981-03-13 1982-09-17 Tosco Corp MECHANISM FORMING JOINT ROTATING SEAL FOR CORNUE
US4406464A (en) * 1982-07-17 1983-09-27 Metallgesellschaft Aktiengesellschaft Face seal arrangement for sealing a rotatable tubular member
EP0113552A1 (en) * 1982-12-14 1984-07-18 British Nuclear Fuels PLC Method of and apparatus for monitoring a rotary kiln
US4507876A (en) * 1983-05-23 1985-04-02 R. J. Reynolds Tobacco Company End seal for rotary treating drum
EP0357939A3 (en) * 1988-09-09 1991-01-09 VEBA OEL Technologie und Automatisierung GmbH Rotating drum
US5106105A (en) * 1990-10-17 1992-04-21 United States Department Of Energy Rotary kiln seal
US5265447A (en) * 1991-12-17 1993-11-30 Kamyr, Inc. Drum washer sealing
US5383672A (en) * 1992-08-28 1995-01-24 Pe Flo-Tech, Inc. Seal structure for rotary kiln
US5491553A (en) * 1994-06-01 1996-02-13 Phillips Kiln Service Company Of Canada, Ltd. Triple laser rotary kiln alignment system
US5906435A (en) * 1993-09-13 1999-05-25 Continental Products Corporation Particulate drum mixer with scoop section and seal assembly with bladder
WO2022186858A1 (en) * 2021-03-05 2022-09-09 Debenedictis Jeremy J Thermal cracking of organic polymeric materials with gas-liquid and liquid-solid separation systems

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1201999A (en) * 1957-09-06 1960-01-07 Finanziaria Siderurgica Finsid Gas-tight seal, especially for rotary kilns

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1201999A (en) * 1957-09-06 1960-01-07 Finanziaria Siderurgica Finsid Gas-tight seal, especially for rotary kilns

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3940239A (en) * 1974-12-16 1976-02-24 Allis-Chalmers Corporation Rotary reducing kiln seal
US4199154A (en) * 1976-07-28 1980-04-22 Stauffer Chemical Company Labyrinth sealing system
US4087334A (en) * 1976-10-04 1978-05-02 Dravo Corporation Seal arrangement for a rotary drum assembly
US4193756A (en) * 1978-03-08 1980-03-18 Tosco Corporation Seal assembly and method for providing a seal in a rotary kiln
FR2501844A1 (en) * 1981-03-13 1982-09-17 Tosco Corp MECHANISM FORMING JOINT ROTATING SEAL FOR CORNUE
US4406464A (en) * 1982-07-17 1983-09-27 Metallgesellschaft Aktiengesellschaft Face seal arrangement for sealing a rotatable tubular member
EP0113552A1 (en) * 1982-12-14 1984-07-18 British Nuclear Fuels PLC Method of and apparatus for monitoring a rotary kiln
US4533319A (en) * 1982-12-14 1985-08-06 British Nuclear Fuels Limited Method of and apparatus for monitoring a rotary kiln assembly
US4507876A (en) * 1983-05-23 1985-04-02 R. J. Reynolds Tobacco Company End seal for rotary treating drum
EP0357939A3 (en) * 1988-09-09 1991-01-09 VEBA OEL Technologie und Automatisierung GmbH Rotating drum
US5106105A (en) * 1990-10-17 1992-04-21 United States Department Of Energy Rotary kiln seal
US5265447A (en) * 1991-12-17 1993-11-30 Kamyr, Inc. Drum washer sealing
US5383672A (en) * 1992-08-28 1995-01-24 Pe Flo-Tech, Inc. Seal structure for rotary kiln
US5906435A (en) * 1993-09-13 1999-05-25 Continental Products Corporation Particulate drum mixer with scoop section and seal assembly with bladder
US5491553A (en) * 1994-06-01 1996-02-13 Phillips Kiln Service Company Of Canada, Ltd. Triple laser rotary kiln alignment system
WO2022186858A1 (en) * 2021-03-05 2022-09-09 Debenedictis Jeremy J Thermal cracking of organic polymeric materials with gas-liquid and liquid-solid separation systems
US20230085993A1 (en) * 2021-03-05 2023-03-23 Alterra Energy, Llc Separation systems and methods for processing organic polymeric materials
US12031092B2 (en) * 2021-03-05 2024-07-09 Alterra Energy, Llc Separation systems and methods for processing organic polymeric materials
US12146107B2 (en) 2021-03-05 2024-11-19 Alterra Energy, Llc Liquid-solid separation systems for processing organic polymeric materials
EP4491696A1 (en) * 2021-03-05 2025-01-15 Neste Oyj Thermal cracking of organic polymeric materials with gas-liquid and liquid-solid separation systems
US12269994B2 (en) 2021-03-05 2025-04-08 Alterra Energy, Llc Separation systems and methods for processing organic polymeric materials

Similar Documents

Publication Publication Date Title
US3724887A (en) Kiln seal
US4199154A (en) Labyrinth sealing system
CN111351345B (en) Rotary furnace
US3285614A (en) Intermediate shaft pneumatic seal
CA1140356A (en) Stainless steel rotary joint
US3383115A (en) Gas seal for furnaces
US2364133A (en) Seal joint
US4457520A (en) Device for sealing the gap between a rotary kiln and an inlet housing
US4811961A (en) Seal for rotating cylinders such as kilns and the like
US3273899A (en) Rotary seal with continuous gas flowexclusion of ingress
US3874707A (en) Self-adjusting seal load compensator
US3575060A (en) Power-operated and manually operated swivel joint
US4875691A (en) Radial seal
US3410566A (en) Sealing member for mechanical seals
US4406464A (en) Face seal arrangement for sealing a rotatable tubular member
GB2158536A (en) Rotary connection for supplying a heat transfer medium to a roller
US3186255A (en) Gear drive enclosure
US2455539A (en) Joint construction
US3408083A (en) Inflatable seal
US3967674A (en) Sealing structure for a machine for centrifugally casting pipes and machine including said structure
US4213754A (en) System for sealing the rotary tube of a rotary tubular kiln
US3152807A (en) Mechanical seals with inspection means
US2371166A (en) Sealing means
US4343478A (en) Face seal assembly for rotating drum
CA2027912C (en) Rotating joint