CA1324973C - Bottom unheading device and method for vertical vessels - Google Patents
Bottom unheading device and method for vertical vesselsInfo
- Publication number
- CA1324973C CA1324973C CA000582121A CA582121A CA1324973C CA 1324973 C CA1324973 C CA 1324973C CA 000582121 A CA000582121 A CA 000582121A CA 582121 A CA582121 A CA 582121A CA 1324973 C CA1324973 C CA 1324973C
- Authority
- CA
- Canada
- Prior art keywords
- cover unit
- vessel
- lower flange
- lifting frame
- attached
- 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
- 238000000034 method Methods 0.000 title abstract description 10
- 238000004939 coking Methods 0.000 claims abstract description 67
- 239000000571 coke Substances 0.000 claims abstract description 35
- 230000009977 dual effect Effects 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 5
- 230000000717 retained effect Effects 0.000 claims description 2
- 230000003111 delayed effect Effects 0.000 description 7
- 238000005235 decoking Methods 0.000 description 6
- 229930195733 hydrocarbon Natural products 0.000 description 4
- 150000002430 hydrocarbons Chemical class 0.000 description 4
- 230000013011 mating Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000004215 Carbon black (E152) Substances 0.000 description 3
- 239000003208 petroleum Substances 0.000 description 3
- 238000003860 storage Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B25/00—Doors or closures for coke ovens
- C10B25/02—Doors; Door frames
- C10B25/08—Closing and opening the doors
- C10B25/14—Devices for lifting doors
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B25/00—Doors or closures for coke ovens
- C10B25/02—Doors; Door frames
- C10B25/08—Closing and opening the doors
- C10B25/10—Closing and opening the doors for ovens with vertical chambers
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B33/00—Discharging devices; Coke guides
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Coke Industry (AREA)
- Baking, Grill, Roasting (AREA)
- Tents Or Canopies (AREA)
- Cultivation Receptacles Or Flower-Pots, Or Pots For Seedlings (AREA)
Abstract
BOTTOM UNHEADING DEVICE AND METHOD FOR VERTICAL VESSELS
ABSTRACT OF THE DISCLOSURE
An unheading device adapted for unheading vertical vessels such as coking drums and a method for remotely operating the device. The unheading device includes a cover unit for attachment to a lower flange of a coking drum which is fastened by a plurality of swing bolts that are disconnected by remotely operated detensioning equipment, and frame device which can lower the cover unit and a carriage that moves it laterally to one side. A chute attached to the frame can be raised into engagement with the coking drum lower flange for removal of coke from the drum. Following such coke removal, the chute is lowered and the cover unit is moved laterally and remotely reconnected to the coking drum lower flange. Also disclosed is a method for remotely operating the unheading device.
ABSTRACT OF THE DISCLOSURE
An unheading device adapted for unheading vertical vessels such as coking drums and a method for remotely operating the device. The unheading device includes a cover unit for attachment to a lower flange of a coking drum which is fastened by a plurality of swing bolts that are disconnected by remotely operated detensioning equipment, and frame device which can lower the cover unit and a carriage that moves it laterally to one side. A chute attached to the frame can be raised into engagement with the coking drum lower flange for removal of coke from the drum. Following such coke removal, the chute is lowered and the cover unit is moved laterally and remotely reconnected to the coking drum lower flange. Also disclosed is a method for remotely operating the unheading device.
Description
~ 1324973 ~ BOTTOM UNHEADING DEVICE AND MET~OD FO~ VERTICAL VESSELS
,~ BACKGROUND OF THE INVENTION
t This invention relates to a bottom unheading device for vertical vessels, 6uch as coking drum6 which are adapted for remote operation. It particularly relates to such a bottom unheading device for removing and replacing a lower cover unit for coXing drums and to a method for remote operation of the unheading device.
During the operation of delayed coking drums or vessels for coking various heavy hydrocarbon materials in petroleum refinery operations, the resulting coke is deposited progress~vely on the ..^~
inner walls of the dxum. When the drum i6 full, the coke must be ~, ~j removed, usually at 36-48 hour intervals. A typical decoking ~:, apparatus for such coking drums is disclosed by U.S. Patent No.
4,611,613 to Kaplan. Such coke removal from coking drums is accomplished through an opening in the lower end of the vertically-oriented drum, and is usually accomplished by manually removing a Iower flange cover and installing a chute to direct the coke removed to a desired location, such as to a hopper or rail car. Because the coking drum operates at relatively high ` temperatures of 800-900F, such removal of the hot coking drum lower cover by manual ~means is slow and hazardous and iB therefore undesirable.
~`' :
; A~
` i324973 A useful remotely operated unheading device for coking drums i6 disclosed by the related Canadian application 545,681 filed August 28, 1987 to Malsbury et al. However, this prior dev~ce has been found to have some deficiencies, which have been overcome by this invention. Accordingly, the invention advantageously provides an improved bottom unheading device for coking drums for remote safe and reliable removal and replacement of a coking drum lower cover unit, and enables more convenient and rapid removal of coke from the drum during decoking operations.
~ 10 SUMMARY OF THE TNVENTION
; The pre~ent invention provides an improved unheadlng device for the bottom flange of vertically oriented vessels such as coking ~; ~ drums. The device is adapted for remote unfastening and removal of a lower cover unit, moving it transversely to one s$de to permit coke removal from the ves6el or drum, and subsequent replacement of the cover unit onto the coking drum. The unheading device according to the invention incIudes a cover unit adapted for being fastened pressure-tightly to a lower flange of a coking drum, bolt - detensioning and pivotable clamping means adapted for unfastening a plurality of bolts for the cover unit and swinging the bolts radially outward and upward so as to permit downward removal of the ; cover unit, a vertically movable lifting frame means adapted for supporting and lowering the cover unit from the drum lower Elange~
' ~
A
:' 132~973 and a carriage unit partially supported by said lifting frame and adapted for lateral movement of the cover unit relative to the lifting frame and coking drum by dual horlzontal piston actuator means for moving the cover unit laterally to a 6ide position. The unheading device also include6 a chute attached to the lifting frame, so that the chute can be raised to contact the coking drum lower flange for conveying the coke removed from the drum. The unheading device also provides for the cover unit to be returned laterally so as to be in vertical alignment with the coking vessel lower flange, then lifted up into engagement with the lower flange, after which the cover unit fastener6 can be rotated downwardly and refastened to reclamp the cover unit into place on the coking drum lower flange.
The multiple bolt fa6teners of the unheading device are pivotally attached to the coking ve6sel lower flange, 80 that they can be swung radially outward ant upward by vertically-oriented plston actuators attached to the ve6sel, thus permittlng lowerlng of ,~
the cover unit. Preferably, two adjacent pivotable bolt6 are attached to a 6ingle piston actuator. The lifting frame means is rectangular-6haped and is supported and moved vertically by four equally-6paced hydraulic piston actuators, which are attached at ; their lower ends to the lifting frame outer corners and are attached at their upper ends to the coking vessel.
A chute i8 attached to the frame for use in removing the ;'` .
~ - 3 -i324973 depos;ted coke from the vessel. After the cover unit mating flanges are unfa~tened, the frame means can lower the cover unit by operation of the four vertically-oriented piston actuators, after which the cover unit can be moved laterally from beneath the coker drum by carriage means including dual horizontal piston actuators located along opposite sides of the cover unit. The four piston actuators of the lifting frame means then raise the coke chute into contact with the coking drum lower flange into the decoking position, so that the accumulated coke can be removed from the vessel through the chute.
After decoking of the ve~sel is completed, the four piston actuators then lower the lifting frame means and the attached coke ,~:
chute, after which the cover unit is then moved laterally back to a position below the drum lower flange by action of the dual , ~ horizontal piston actuators. The frame means then raises the cover r.'~ ~: unit into mating poRition for rebolting it to the coking drum lower flange. The bolt detensioning and lift mechanisms for the cover unit and coke chute are advantageously operated by hydraulic pi~tons operated by remote control. This unheading device and chute arrangement can be advantageously applied to either new or existing delayed coking drums, for decoking the drums much more rapidly and with increased reliability and safety at intervals of 36-48 hours operation.
~ The present invention also provides a method for removing a `::
~ 4 -, ~
,-:
',~:
. .
.
132'~g73 lower cover unit from vertically oriented vessels such as coking drums for coke removal, and replacing the cover unit on the vessel or coking drum. The method includes the step~ of unfastening a flanged joint provided between a lower flange of the delayed coking vessel and a removable cover unit by detensioning a plurality of bolt fasteners using remotely operated hydraulic devices for detensioning the fastener bolts, and swinging the bolts radially - outwardly and upwardly, then lowering the cover unit and moving it laterally to a side position. Next, a coke chute is raised and connected to the coking vessel lower flange for removing the coke contents from the vessel. Following such coke removal, the chute i8 lowered and the cover unit is moved laterally so as to be in vertical alignment with the coking vessel lower flange, and then raised back into its original position against the coking vessel , ~ .
`;; flange. The fastener bolts are then swung downwardly into position ~! ~ and reten6ioned to reconnect the cover unit onto the coking vessel - ~ lower flange.
It is an advantage to have a vessel or coking drum lower cover unit that can be conveniently and safely removed from the coking drum using a remotely-operated unheading device, which loosenOE the plurality of bolt fasteners and pivots the fasteners outwardly, then lowers the cover unit and moves it laterally aside. Such unheading device and method permits more rapid and reliable removal of coke deposited in a coking drum, so as to increase the available , ~O' , ,;
13~973 operating time for the drum, and also improves personal safety by avoiding undesirable exposure of personnel to hot hydrocarbons, steam and water during such unheading operations. Vertically oriented ves6els on which this unheading device and method can be advantageously used include coking drums, reactors, or any vessel of a similar configuration, where danger to personnel exits during an unheading operation.
According tc an aspect of the invention, there is provided an improved unheading device adapted for removal and replacement of a lower cover unit for a vertical vessel. A cover unit is adapted for being sealably attached by bol~s to a lower flange of a lower flanged opening in a vertical vessel. The cover unit includes a supporting cradle means. At least eight pivotable clamping means are substantially equally spaced around the perimeter of the cover unit. Each includes a detensioning means. They are adapted for ~ detensioning and pivotably removing the bolts located in the cover ;~ unit and the lower flange of the vessel so as to unfasten the cover unit from the vessel. A lifting frame means is located below the cover unit and the cradle means. It is supported from the vessel and is vertically movable by four equally-spaced vertically-oriented piston actuator means. Carriage means are adapted to provide lateral movement of the cover unit relative to the lifting frame means by dual horizontal piston actuator means. The carriage means is at least partly supported by the lifting frame during lateral 1324~73 movement of the cover unit, whereby the cover unit can be lowered from the vessel lower flange and moved aside laterally to permit material removal through the lower opening in the vessel, and then reconnected to the vessel lower flange.
. .
BRIEF DESCRIPTION QF DRAWINGS
This invention will be further described with reference to the following drawings, in which:
Fig. 1 shows a vertically-oriented delayed coking vesrel or drum having a structural 6upport means and a removable lower cover unit provided at the drum lower end Fig. 2 shows an enlarged perspective view of the bottom unheader device removably attached to the coking drum lower flange and supported by a vertically movable frame member according to the present invention, with the cover unit and its fastening bolts connected in place;
Fig. 3 i8 an enlarged elevation view sh w ing the cover unit removably attached to the coking vessel lower flange, and the supporting frame member and a coke removal chute provided below the cover unit;
Fig. 4 is an enlarged cross-sectional plan view taken at line 4-4' of Fig. 3, showing location of detensioning and actuator means for removing the multiple fasteners in the coking drum lower flange;
Fig. 5 shows a detail plan view of a flange clamp taken at line 132~73 5-5' of Fig. 3;
Figs. 6 and 7 show sectional elevation views taken at lines 6-6' and 7-7' of Fig. 5 Fig. 8 shows an enlarged elevation view similar to Fig. 3, but with the flange fastener bolts swung outwardly and the cover unit lowered away from the coking drum lower flange;
Fig. 9 i6 an elevation view showing the frame member lowered onto location pins and the cover and cradle units moved aside;
Fig. 10 is an elevation view similar to Fig. 9, showing cover unit moved aside and the lifting frame member and coke chute moved upwardly to contact the coking drum lower flange for removal of coke from the dru~; and Fi~. 11 shows a plan view of the unheader device taken at line 11' of Fig. 9.
:~ ;
DETAILED DESCRIPTION OF INVENTION
As generally shown by the Fig. 1 drawing, a delayed coking drum or vessel 10 i8 vertically-oriented and supported by an adjacent support ;6tructure 11- and also by a lower platform structure 12 provided below the drum 10. Such a delayed coking drum 10 for use 20~ ~ in petroleum refineries is usually 20-25 ft. diameter and 75-100 ft.
tall, and has a conical lower portion 10a attached to a lower flange 13 which is usually 5-7 ft. diameter. A removable lower cover unit ~ 14 ls pr-esure-tightly att~ched to the lower flange 13 by a s ~
-.~
` 1324~73 plurality of clamp fastener means 20. The coke deposited progressively in coking drum vessel 10 is removed from the drum periodically as needed by removing the lower cover unit 14 and ; hydraulically cutting the coke from within the vessel, so that the coke falls through a chute 15 into a storage pit or a rail car (not shown) for further use.
The cover unit 14 i6 fastened onto the lower flange 13 of ve6sel 10 by multiple pivotable clamp fastener means 20, as shown in greater detail by Figs. 2 and 3. Cover unit 14 includes a cradle support structure 16 having dual horizontal skid members 18 ` extending along two opposite side6 of the cradle 6tructure 16, and which are partially fiupported by a rectangular-shaped frame member or unit 30. It will be noted that cover unit 14 also includes a lateral conduit 19 used for feeding hydrocarbon, ~team and water material~ into the coke drum 10 and to drain water from the drum.
A6 is shown in Figs. 2 and 3 and further shown in Fig. 4, 16-48 swing type clamp fastener6 20 (depending on the flange diameter and pre6sure ratin~) are provided evenly spaced around the periphery of flange 13 for pressure-tightly clamping the cover unit 14 onto the lower flange 13 of vessel 10.
As shown in greater detail by Figs. 5 7, each clamp fastener device 20 is con6tructed and operated similarly, and includes a clamp arm 21 which is pivotably attached at its upper end 21a to flange 13 by a pivot pin 22 pivotably ~ecured to the upper surface :
_ g _ ~', . ,.
`:
i~
:: -132~73 of flange 13 near the outer perimeter of the flange. The other or lower end 21b of clamp arm 21 is pivotally attached to a lower end `:`
of a piston actuator 24. The upper end of actuator 24 is pivotably attached at 25 to the outer wall portion lOa of coker drum 10 (Figs.
,~ BACKGROUND OF THE INVENTION
t This invention relates to a bottom unheading device for vertical vessels, 6uch as coking drum6 which are adapted for remote operation. It particularly relates to such a bottom unheading device for removing and replacing a lower cover unit for coXing drums and to a method for remote operation of the unheading device.
During the operation of delayed coking drums or vessels for coking various heavy hydrocarbon materials in petroleum refinery operations, the resulting coke is deposited progress~vely on the ..^~
inner walls of the dxum. When the drum i6 full, the coke must be ~, ~j removed, usually at 36-48 hour intervals. A typical decoking ~:, apparatus for such coking drums is disclosed by U.S. Patent No.
4,611,613 to Kaplan. Such coke removal from coking drums is accomplished through an opening in the lower end of the vertically-oriented drum, and is usually accomplished by manually removing a Iower flange cover and installing a chute to direct the coke removed to a desired location, such as to a hopper or rail car. Because the coking drum operates at relatively high ` temperatures of 800-900F, such removal of the hot coking drum lower cover by manual ~means is slow and hazardous and iB therefore undesirable.
~`' :
; A~
` i324973 A useful remotely operated unheading device for coking drums i6 disclosed by the related Canadian application 545,681 filed August 28, 1987 to Malsbury et al. However, this prior dev~ce has been found to have some deficiencies, which have been overcome by this invention. Accordingly, the invention advantageously provides an improved bottom unheading device for coking drums for remote safe and reliable removal and replacement of a coking drum lower cover unit, and enables more convenient and rapid removal of coke from the drum during decoking operations.
~ 10 SUMMARY OF THE TNVENTION
; The pre~ent invention provides an improved unheadlng device for the bottom flange of vertically oriented vessels such as coking ~; ~ drums. The device is adapted for remote unfastening and removal of a lower cover unit, moving it transversely to one s$de to permit coke removal from the ves6el or drum, and subsequent replacement of the cover unit onto the coking drum. The unheading device according to the invention incIudes a cover unit adapted for being fastened pressure-tightly to a lower flange of a coking drum, bolt - detensioning and pivotable clamping means adapted for unfastening a plurality of bolts for the cover unit and swinging the bolts radially outward and upward so as to permit downward removal of the ; cover unit, a vertically movable lifting frame means adapted for supporting and lowering the cover unit from the drum lower Elange~
' ~
A
:' 132~973 and a carriage unit partially supported by said lifting frame and adapted for lateral movement of the cover unit relative to the lifting frame and coking drum by dual horlzontal piston actuator means for moving the cover unit laterally to a 6ide position. The unheading device also include6 a chute attached to the lifting frame, so that the chute can be raised to contact the coking drum lower flange for conveying the coke removed from the drum. The unheading device also provides for the cover unit to be returned laterally so as to be in vertical alignment with the coking vessel lower flange, then lifted up into engagement with the lower flange, after which the cover unit fastener6 can be rotated downwardly and refastened to reclamp the cover unit into place on the coking drum lower flange.
The multiple bolt fa6teners of the unheading device are pivotally attached to the coking ve6sel lower flange, 80 that they can be swung radially outward ant upward by vertically-oriented plston actuators attached to the ve6sel, thus permittlng lowerlng of ,~
the cover unit. Preferably, two adjacent pivotable bolt6 are attached to a 6ingle piston actuator. The lifting frame means is rectangular-6haped and is supported and moved vertically by four equally-6paced hydraulic piston actuators, which are attached at ; their lower ends to the lifting frame outer corners and are attached at their upper ends to the coking vessel.
A chute i8 attached to the frame for use in removing the ;'` .
~ - 3 -i324973 depos;ted coke from the vessel. After the cover unit mating flanges are unfa~tened, the frame means can lower the cover unit by operation of the four vertically-oriented piston actuators, after which the cover unit can be moved laterally from beneath the coker drum by carriage means including dual horizontal piston actuators located along opposite sides of the cover unit. The four piston actuators of the lifting frame means then raise the coke chute into contact with the coking drum lower flange into the decoking position, so that the accumulated coke can be removed from the vessel through the chute.
After decoking of the ve~sel is completed, the four piston actuators then lower the lifting frame means and the attached coke ,~:
chute, after which the cover unit is then moved laterally back to a position below the drum lower flange by action of the dual , ~ horizontal piston actuators. The frame means then raises the cover r.'~ ~: unit into mating poRition for rebolting it to the coking drum lower flange. The bolt detensioning and lift mechanisms for the cover unit and coke chute are advantageously operated by hydraulic pi~tons operated by remote control. This unheading device and chute arrangement can be advantageously applied to either new or existing delayed coking drums, for decoking the drums much more rapidly and with increased reliability and safety at intervals of 36-48 hours operation.
~ The present invention also provides a method for removing a `::
~ 4 -, ~
,-:
',~:
. .
.
132'~g73 lower cover unit from vertically oriented vessels such as coking drums for coke removal, and replacing the cover unit on the vessel or coking drum. The method includes the step~ of unfastening a flanged joint provided between a lower flange of the delayed coking vessel and a removable cover unit by detensioning a plurality of bolt fasteners using remotely operated hydraulic devices for detensioning the fastener bolts, and swinging the bolts radially - outwardly and upwardly, then lowering the cover unit and moving it laterally to a side position. Next, a coke chute is raised and connected to the coking vessel lower flange for removing the coke contents from the vessel. Following such coke removal, the chute i8 lowered and the cover unit is moved laterally so as to be in vertical alignment with the coking vessel lower flange, and then raised back into its original position against the coking vessel , ~ .
`;; flange. The fastener bolts are then swung downwardly into position ~! ~ and reten6ioned to reconnect the cover unit onto the coking vessel - ~ lower flange.
It is an advantage to have a vessel or coking drum lower cover unit that can be conveniently and safely removed from the coking drum using a remotely-operated unheading device, which loosenOE the plurality of bolt fasteners and pivots the fasteners outwardly, then lowers the cover unit and moves it laterally aside. Such unheading device and method permits more rapid and reliable removal of coke deposited in a coking drum, so as to increase the available , ~O' , ,;
13~973 operating time for the drum, and also improves personal safety by avoiding undesirable exposure of personnel to hot hydrocarbons, steam and water during such unheading operations. Vertically oriented ves6els on which this unheading device and method can be advantageously used include coking drums, reactors, or any vessel of a similar configuration, where danger to personnel exits during an unheading operation.
According tc an aspect of the invention, there is provided an improved unheading device adapted for removal and replacement of a lower cover unit for a vertical vessel. A cover unit is adapted for being sealably attached by bol~s to a lower flange of a lower flanged opening in a vertical vessel. The cover unit includes a supporting cradle means. At least eight pivotable clamping means are substantially equally spaced around the perimeter of the cover unit. Each includes a detensioning means. They are adapted for ~ detensioning and pivotably removing the bolts located in the cover ;~ unit and the lower flange of the vessel so as to unfasten the cover unit from the vessel. A lifting frame means is located below the cover unit and the cradle means. It is supported from the vessel and is vertically movable by four equally-spaced vertically-oriented piston actuator means. Carriage means are adapted to provide lateral movement of the cover unit relative to the lifting frame means by dual horizontal piston actuator means. The carriage means is at least partly supported by the lifting frame during lateral 1324~73 movement of the cover unit, whereby the cover unit can be lowered from the vessel lower flange and moved aside laterally to permit material removal through the lower opening in the vessel, and then reconnected to the vessel lower flange.
. .
BRIEF DESCRIPTION QF DRAWINGS
This invention will be further described with reference to the following drawings, in which:
Fig. 1 shows a vertically-oriented delayed coking vesrel or drum having a structural 6upport means and a removable lower cover unit provided at the drum lower end Fig. 2 shows an enlarged perspective view of the bottom unheader device removably attached to the coking drum lower flange and supported by a vertically movable frame member according to the present invention, with the cover unit and its fastening bolts connected in place;
Fig. 3 i8 an enlarged elevation view sh w ing the cover unit removably attached to the coking vessel lower flange, and the supporting frame member and a coke removal chute provided below the cover unit;
Fig. 4 is an enlarged cross-sectional plan view taken at line 4-4' of Fig. 3, showing location of detensioning and actuator means for removing the multiple fasteners in the coking drum lower flange;
Fig. 5 shows a detail plan view of a flange clamp taken at line 132~73 5-5' of Fig. 3;
Figs. 6 and 7 show sectional elevation views taken at lines 6-6' and 7-7' of Fig. 5 Fig. 8 shows an enlarged elevation view similar to Fig. 3, but with the flange fastener bolts swung outwardly and the cover unit lowered away from the coking drum lower flange;
Fig. 9 i6 an elevation view showing the frame member lowered onto location pins and the cover and cradle units moved aside;
Fig. 10 is an elevation view similar to Fig. 9, showing cover unit moved aside and the lifting frame member and coke chute moved upwardly to contact the coking drum lower flange for removal of coke from the dru~; and Fi~. 11 shows a plan view of the unheader device taken at line 11' of Fig. 9.
:~ ;
DETAILED DESCRIPTION OF INVENTION
As generally shown by the Fig. 1 drawing, a delayed coking drum or vessel 10 i8 vertically-oriented and supported by an adjacent support ;6tructure 11- and also by a lower platform structure 12 provided below the drum 10. Such a delayed coking drum 10 for use 20~ ~ in petroleum refineries is usually 20-25 ft. diameter and 75-100 ft.
tall, and has a conical lower portion 10a attached to a lower flange 13 which is usually 5-7 ft. diameter. A removable lower cover unit ~ 14 ls pr-esure-tightly att~ched to the lower flange 13 by a s ~
-.~
` 1324~73 plurality of clamp fastener means 20. The coke deposited progressively in coking drum vessel 10 is removed from the drum periodically as needed by removing the lower cover unit 14 and ; hydraulically cutting the coke from within the vessel, so that the coke falls through a chute 15 into a storage pit or a rail car (not shown) for further use.
The cover unit 14 i6 fastened onto the lower flange 13 of ve6sel 10 by multiple pivotable clamp fastener means 20, as shown in greater detail by Figs. 2 and 3. Cover unit 14 includes a cradle support structure 16 having dual horizontal skid members 18 ` extending along two opposite side6 of the cradle 6tructure 16, and which are partially fiupported by a rectangular-shaped frame member or unit 30. It will be noted that cover unit 14 also includes a lateral conduit 19 used for feeding hydrocarbon, ~team and water material~ into the coke drum 10 and to drain water from the drum.
A6 is shown in Figs. 2 and 3 and further shown in Fig. 4, 16-48 swing type clamp fastener6 20 (depending on the flange diameter and pre6sure ratin~) are provided evenly spaced around the periphery of flange 13 for pressure-tightly clamping the cover unit 14 onto the lower flange 13 of vessel 10.
As shown in greater detail by Figs. 5 7, each clamp fastener device 20 is con6tructed and operated similarly, and includes a clamp arm 21 which is pivotably attached at its upper end 21a to flange 13 by a pivot pin 22 pivotably ~ecured to the upper surface :
_ g _ ~', . ,.
`:
i~
:: -132~73 of flange 13 near the outer perimeter of the flange. The other or lower end 21b of clamp arm 21 is pivotally attached to a lower end `:`
of a piston actuator 24. The upper end of actuator 24 is pivotably attached at 25 to the outer wall portion lOa of coker drum 10 (Figs.
2 and 3). The upper end 21a of each clamp 21 i~ al~o rigidly connected via pivot pin 22 to the upper end of a fastener bolt 26, which is provided in a vertical slot 27 provided in both the lower flange 13 of vessel 10 and in the mating cover unit 14. Also, a remotely operated tensioning unit 28 is provided attached to each bolt 26 below the cover unit 14 (Fig. 3~. The bolt tensioning unit 28 may be similar to that described in U.S. Patent 3,015,975 to Biach. Those wishing further detail of Ruch a ten~ioning unit may refer to that patent. The tensioning units 28 are usually operated by a suitable hydraulic pressure source connected to each tensioning unit. Preferably, each two adjacent pivotable bolts 26 are attached to a single piston actuator 24 attached to an elongated pivot pin 23 '~ (Fig. 5).
When it is desired to open the flanged joint between the drum lower flange 13 and cover unit 14, the bolt tensioning units 28 are first remotely actuated to detension the bolts 26, thereby lowering the cover unit 14 and cradie structure 16 by a distance of 0.25-1 inch by the lift frame support unit 30. Then, the swing actuator pistons 24 are actuated, so as to swing the bolts 26 radially outwardly and upwardIy to a di~connected or unfastened position as ~ ~ -10-~4 ?
~32~97~
shown in Fig. 8.
For supporting and lowering the cover unit 14 from the coker : vessel lower flange 13, the lift frame ~upport unit 30 is provided below and in supporting engagement with dual skid members 18 of cradle structure 16, as is ~hown by Figs. 2, 3 and 8. The frame unit 30 i8 adapted for contacting the lower surface of cradle support structure 16 and skid member 18 of the cover unit 14. The frame unit 30 includes four vertically-extending brackets 32 located ~: at its four corners, and each bracket is pivotally attached to a vertically-oriented piston actuator 34 adapted for controllably lifting and lowering the frame unit 30. The upper end of each piston actuator 34 is pivotably attached to the conical portion lOa of coking drum 10. After the fastener bolts 26 have been detensioned and the cover unit 14 initially lowered by 0.25-1 inch and is being supported by frame unit 30, the bolts 2~ are then swung radially outwardly and upwardly from flange 13. Then the cover unit 14 i8 further lowered by frame unit 30 as shown by Fig. 8, and is then moved laterally aside as shown by Figs. 9 and 10. The vertical movements for cover unit 14 are accomplished by it being vertically movable by the four vertically-oriented piston actuators 34. The frame unit 30 is lowered onto at leafit two and usually four alignment pins 31, as shcwn in Fig 3, so that the frame 30 remains ~ in a fixed horizontal position relative to the flange 13 of coking .~ drum 10.
.,~
::
..,~
~i 1324~73 After the cover unit 14 has been lowered by action of frame unit 30 vertical piston actuators 34 as shown by Fig. 8, the cover unit 14 is then moved aside laterally by carriage means including dual horizontal pi6ton actuators 36, which extend substantially horizontally along two sides of cover unit 14. The dual actuators of carriage means 36 are each connected at their forward end ~6a to cover unit 14 by lug 35, and are each connected at their rearward end to anchor means 37. The orientation and relative position of the parts of lifting frame unit 30 i8 additionally shown in a plan ` lO view of the platform support device by Fig. 11.
While the cover unit 14 is being moved aside laterally to an offset position as shown by Figs. 9 and 10, by extension action of the piston actuators 36, the lower skid members 18 are initially retained by dual guide surfaces 33a and 33b which are provided extending along opposite sides of the frame unit 30. The forward `~' end portion of cradle support 16 is preferably partially supported by support means 38, such as dual rollers or slide plates running along parallel trscks 39 provided in deck 40. The rear end of cradle support 16 rests on a chair member 41 attached to deck 40.
Then, after the cover unlt 14 ha0 been moved laternlly to one side and thereby is detached from the lifting frame 30, collapsible chute I ~ ~
15 which is attached to lower portion 30a of the frame device 30, is simultaneously raised by action of the four piston actuators 34 so that chute lS contacts the lower flange 13 of the coker Yessel 10.
`,~
~' .,!
13~973 An elevational view of the chute 15 being in contact with the lower flange 13 of the coker vessel 10 is shown by Fig. 10. The coke i6 removed from with;n the coking drum 10 and falls through chute 15 to a storage pit or rail car (not shown) for further processing or use.
After the decoking operation for the coker drum 10 is completed, the frame unit 30 and attached chute 15 are lowered, and then cover unit 14 is returned to its original position and reconnected onto the drum flange 13, as was shown by Figs. 2 and 3. This return movement for cover unit 14 is accomplished by first lowering frame 30 and coke chute 15 by the four actuator pistons 34, then retracting dual piston actuators 36 to move the cover unit 14 laterally to a position in vertical alignment below flange 13, then raising frame 30 so that cover unit 14 i8 again placed against and in alignment with lower flange 13. Next, the swing actuators 24 are extended so as to pivot the bolts 26 downwardly into the slot~ 27, as shown by Figs. 6 and 7. Then the multiple tensioning units 28 are actuated so as to clamp the mating flange 13 and cover unit 14 tightly together again.
; This invention will be further described by the following example of operation~, which should not be construed as limiting the scope of the invention.
- 13 _ E X A ~ P L E
In a coking drum used for delayed coking of petroleum ; feedstocks, after 36-48 hours of operation sufficient coke is deposited progressively on the inner wall of the drum that removal of the coke is required before continued operation. The coking drum, which is equipped with a lower flange cover unit constructed and operated in accordance with this invention, is shut down, depressurized and the lower head cover unit is removed. Important characteristics of the coker drum lower cover unit and unheading device are as follows:
.
Coker lower flange diameter, in. 72 Cover unit flange diameter, in. 72 , : ~
~ ~ Cover unit length, in. 18 ,, ~
Number of fastener swing bolts 36 ` ; Swing bolt diameter, in. 1.25 Bolt slot width in flange, in. 1.5 Vertical move-ent of llft frame, in. 12 Lateral~movement of cover unit,~in. 105 Lift actuator hydraulic pressure, psig 1500 ~ Following switch out of the heavy hydrocarbon feed, steam, water quench and draining of the coking drum, the lower cover unit i8 l~ ~ removed and replaced using the following procedure:
~, , ;,~
a) Detension the fastener swing bolts clamplng the cover unit to the coking drum lower flange by pressurizing the hydraulically-operated bolt tension units to sufficiently loosen the bolts to lower the cover unlt 0.25 - 1 inch onto a lifting frame unit and to permit the bolts to swing outwardly from the flange periphery.
b) Pressurize the pistQn actuators to retract and swing the fa6tener bolts outwardly and upwardly, thus freeing the cover unit flange from the coking drum lower flange.
c) Pressurize the lift frame astuators and lower the cover unit, then move it aside by pressurizing and extending the dual lateral piston actuators.
d) Reverse pressurize four lift actuators to move coke chute upwardly to mate with the coXing drum lower flange to permit removal of the coke.
e) Following removal of accumulated coke from the coking drum, lower the coke chute, move the cover unit `~ laterally to be back in vert~cal alignment with the coking drum flange, and then lift the cover unit to mate with the coking drum flange.
f) Reverse pressurize swing piston actuators to extend the swing bolts downward into the bolt slots of the cover flange, then actuate the tensioning units to retension the flange bolts to securely reclamp the cover unit onto ;:
,' ~' ~ . , 1324~73 the lower flange of the coking drum.
Although this invention has been disclosed broadly and in terms of a preferred embodiment, it will be understood that modifications and variations can be made within the 6cope of the invention, which i6 defined by the following claims.
';;
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.
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. . ~
When it is desired to open the flanged joint between the drum lower flange 13 and cover unit 14, the bolt tensioning units 28 are first remotely actuated to detension the bolts 26, thereby lowering the cover unit 14 and cradie structure 16 by a distance of 0.25-1 inch by the lift frame support unit 30. Then, the swing actuator pistons 24 are actuated, so as to swing the bolts 26 radially outwardly and upwardIy to a di~connected or unfastened position as ~ ~ -10-~4 ?
~32~97~
shown in Fig. 8.
For supporting and lowering the cover unit 14 from the coker : vessel lower flange 13, the lift frame ~upport unit 30 is provided below and in supporting engagement with dual skid members 18 of cradle structure 16, as is ~hown by Figs. 2, 3 and 8. The frame unit 30 i8 adapted for contacting the lower surface of cradle support structure 16 and skid member 18 of the cover unit 14. The frame unit 30 includes four vertically-extending brackets 32 located ~: at its four corners, and each bracket is pivotally attached to a vertically-oriented piston actuator 34 adapted for controllably lifting and lowering the frame unit 30. The upper end of each piston actuator 34 is pivotably attached to the conical portion lOa of coking drum 10. After the fastener bolts 26 have been detensioned and the cover unit 14 initially lowered by 0.25-1 inch and is being supported by frame unit 30, the bolts 2~ are then swung radially outwardly and upwardly from flange 13. Then the cover unit 14 i8 further lowered by frame unit 30 as shown by Fig. 8, and is then moved laterally aside as shown by Figs. 9 and 10. The vertical movements for cover unit 14 are accomplished by it being vertically movable by the four vertically-oriented piston actuators 34. The frame unit 30 is lowered onto at leafit two and usually four alignment pins 31, as shcwn in Fig 3, so that the frame 30 remains ~ in a fixed horizontal position relative to the flange 13 of coking .~ drum 10.
.,~
::
..,~
~i 1324~73 After the cover unit 14 has been lowered by action of frame unit 30 vertical piston actuators 34 as shown by Fig. 8, the cover unit 14 is then moved aside laterally by carriage means including dual horizontal pi6ton actuators 36, which extend substantially horizontally along two sides of cover unit 14. The dual actuators of carriage means 36 are each connected at their forward end ~6a to cover unit 14 by lug 35, and are each connected at their rearward end to anchor means 37. The orientation and relative position of the parts of lifting frame unit 30 i8 additionally shown in a plan ` lO view of the platform support device by Fig. 11.
While the cover unit 14 is being moved aside laterally to an offset position as shown by Figs. 9 and 10, by extension action of the piston actuators 36, the lower skid members 18 are initially retained by dual guide surfaces 33a and 33b which are provided extending along opposite sides of the frame unit 30. The forward `~' end portion of cradle support 16 is preferably partially supported by support means 38, such as dual rollers or slide plates running along parallel trscks 39 provided in deck 40. The rear end of cradle support 16 rests on a chair member 41 attached to deck 40.
Then, after the cover unlt 14 ha0 been moved laternlly to one side and thereby is detached from the lifting frame 30, collapsible chute I ~ ~
15 which is attached to lower portion 30a of the frame device 30, is simultaneously raised by action of the four piston actuators 34 so that chute lS contacts the lower flange 13 of the coker Yessel 10.
`,~
~' .,!
13~973 An elevational view of the chute 15 being in contact with the lower flange 13 of the coker vessel 10 is shown by Fig. 10. The coke i6 removed from with;n the coking drum 10 and falls through chute 15 to a storage pit or rail car (not shown) for further processing or use.
After the decoking operation for the coker drum 10 is completed, the frame unit 30 and attached chute 15 are lowered, and then cover unit 14 is returned to its original position and reconnected onto the drum flange 13, as was shown by Figs. 2 and 3. This return movement for cover unit 14 is accomplished by first lowering frame 30 and coke chute 15 by the four actuator pistons 34, then retracting dual piston actuators 36 to move the cover unit 14 laterally to a position in vertical alignment below flange 13, then raising frame 30 so that cover unit 14 i8 again placed against and in alignment with lower flange 13. Next, the swing actuators 24 are extended so as to pivot the bolts 26 downwardly into the slot~ 27, as shown by Figs. 6 and 7. Then the multiple tensioning units 28 are actuated so as to clamp the mating flange 13 and cover unit 14 tightly together again.
; This invention will be further described by the following example of operation~, which should not be construed as limiting the scope of the invention.
- 13 _ E X A ~ P L E
In a coking drum used for delayed coking of petroleum ; feedstocks, after 36-48 hours of operation sufficient coke is deposited progressively on the inner wall of the drum that removal of the coke is required before continued operation. The coking drum, which is equipped with a lower flange cover unit constructed and operated in accordance with this invention, is shut down, depressurized and the lower head cover unit is removed. Important characteristics of the coker drum lower cover unit and unheading device are as follows:
.
Coker lower flange diameter, in. 72 Cover unit flange diameter, in. 72 , : ~
~ ~ Cover unit length, in. 18 ,, ~
Number of fastener swing bolts 36 ` ; Swing bolt diameter, in. 1.25 Bolt slot width in flange, in. 1.5 Vertical move-ent of llft frame, in. 12 Lateral~movement of cover unit,~in. 105 Lift actuator hydraulic pressure, psig 1500 ~ Following switch out of the heavy hydrocarbon feed, steam, water quench and draining of the coking drum, the lower cover unit i8 l~ ~ removed and replaced using the following procedure:
~, , ;,~
a) Detension the fastener swing bolts clamplng the cover unit to the coking drum lower flange by pressurizing the hydraulically-operated bolt tension units to sufficiently loosen the bolts to lower the cover unlt 0.25 - 1 inch onto a lifting frame unit and to permit the bolts to swing outwardly from the flange periphery.
b) Pressurize the pistQn actuators to retract and swing the fa6tener bolts outwardly and upwardly, thus freeing the cover unit flange from the coking drum lower flange.
c) Pressurize the lift frame astuators and lower the cover unit, then move it aside by pressurizing and extending the dual lateral piston actuators.
d) Reverse pressurize four lift actuators to move coke chute upwardly to mate with the coXing drum lower flange to permit removal of the coke.
e) Following removal of accumulated coke from the coking drum, lower the coke chute, move the cover unit `~ laterally to be back in vert~cal alignment with the coking drum flange, and then lift the cover unit to mate with the coking drum flange.
f) Reverse pressurize swing piston actuators to extend the swing bolts downward into the bolt slots of the cover flange, then actuate the tensioning units to retension the flange bolts to securely reclamp the cover unit onto ;:
,' ~' ~ . , 1324~73 the lower flange of the coking drum.
Although this invention has been disclosed broadly and in terms of a preferred embodiment, it will be understood that modifications and variations can be made within the 6cope of the invention, which i6 defined by the following claims.
';;
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.
~.:
``' ~
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. . ~
Claims (11)
1. An improved unheading device adapted for removal and replacement of a lower cover unit for a vertical vessel, comprising:
(a) a cover unit adapted for being sealably attached by bolts to a lower flange of a lower flanged opening in a vertical vessel, said cover unit including a supporting cradle means;
(b) at least eight pivotable clamping means each including a detensioning means, said clamping means being substantially equally spaced around the perimeter of said cover unit and adapted for detensioning and pivotably removing the bolts located in said cover unit and the lower flange of the vessel so as to unfasten said cover unit from the vessel;
(c) a lifting frame means located below said cover unit and said cradle means, said lifting frame being supported from said vessel and vertically movable by four equally-spaced vertically-oriented piston actuator means; and (d) carriage means adapted for providing lateral movement of the cover unit relative to the lifting frame means by dual horizontal piston actuator means, said carriage means being at least partly supported by said lifting frame during lateral movement of the cover unit, whereby the cover unit can be lowered from the vessel lower flange and moved aside laterally to permit material removal through the lower opening in the vessel, and then reconnected to the vessel lower flange.
(a) a cover unit adapted for being sealably attached by bolts to a lower flange of a lower flanged opening in a vertical vessel, said cover unit including a supporting cradle means;
(b) at least eight pivotable clamping means each including a detensioning means, said clamping means being substantially equally spaced around the perimeter of said cover unit and adapted for detensioning and pivotably removing the bolts located in said cover unit and the lower flange of the vessel so as to unfasten said cover unit from the vessel;
(c) a lifting frame means located below said cover unit and said cradle means, said lifting frame being supported from said vessel and vertically movable by four equally-spaced vertically-oriented piston actuator means; and (d) carriage means adapted for providing lateral movement of the cover unit relative to the lifting frame means by dual horizontal piston actuator means, said carriage means being at least partly supported by said lifting frame during lateral movement of the cover unit, whereby the cover unit can be lowered from the vessel lower flange and moved aside laterally to permit material removal through the lower opening in the vessel, and then reconnected to the vessel lower flange.
2. The unheading device of claim 1, wherein each clamping means is pivotally attached to said vessel lower flange and multiple sets of two adjacent clamping means which are attached to a single hydraulic piston actuator, whereby the clamping means bolts can be swung radially outwardly and upwardly to unfasten the flanged joint from the vessel.
3. The unheading device of claim 1, wherein said bolt detensioning means are provided at a lower end of each bolt and are each adapted to be operated by hydraulic pressure means.
4. The unheading device of claim 1, wherein said lifting frame when lowered is retained in a horizontal position directly below said lower flange by a plurality of vertically-oriented pegs which interfit with openings in the frame.
5. The unheading device of claim 1, wherein said cradle means is at least partially supported by slide plates located at the cradle means forward end.
6. The unheading device of claim 1, including a chute attached to said lifting frame means and adapted for contact with the vessel lower head flange for removing material from the vessel.
7. The unheading device of claim 1, wherein 16-48 pivotable clamping devices with attached bolt detensioning means are provided equally-spaced around the periphery of said cover unit.
8. The unheading device of claim 5, wherein said cradle means slide plates slide on dual rails located below a deck surface.
9. The unheading device of claim 1, wherein said vessel is a vertically oriented coking drum.
10. The unheading device of claim 1, wherein said vessel is a vertically oriented reactor.
11. An improved unheading device adapted for removal and replacement of a lower cover unit for flanged openings in a vertically oriented coking drum, comprising:
(a) a cover unit adapted for being sealably attached by bolts to a flange of a lower flanged opening in a coking drum, said cover unit being attached to a supporting cradle means;
(b) at least eight pivotable clamping means each pivotably attached to the vessel lower flange and including a detensioning means, said clamping means being substantially equally spaced around the perimeter of said cover unit, each detensioning means being adapted for connecting onto a lower nut for detensioning and removing the fastening bolts pivotably outward and upward so as to unfasten said cover unit from the coking drum lower flange;
(c) a lifting frame means located below said cover unit and said cradle means, said lifting frame being supported from said coking drum and vertically movable by four equally-spaced vertically-oriented piston actuator means; and (d) carriage means supported partially by said lifting frame, said carriage means being adapted for lateral movement relative to the lifting frame by dual horizontally oriented piston actuators which are each attached to the carriage means forward end, said carriage means being supported at its forward end by a guide surface sliding on a support rail, whereby said cover unit can be lowered from the coking drum lower flange and moved laterally aside to permit coke removal through the lower opening in the coking drum, and then reconnected to the coking drum lower flange.
(a) a cover unit adapted for being sealably attached by bolts to a flange of a lower flanged opening in a coking drum, said cover unit being attached to a supporting cradle means;
(b) at least eight pivotable clamping means each pivotably attached to the vessel lower flange and including a detensioning means, said clamping means being substantially equally spaced around the perimeter of said cover unit, each detensioning means being adapted for connecting onto a lower nut for detensioning and removing the fastening bolts pivotably outward and upward so as to unfasten said cover unit from the coking drum lower flange;
(c) a lifting frame means located below said cover unit and said cradle means, said lifting frame being supported from said coking drum and vertically movable by four equally-spaced vertically-oriented piston actuator means; and (d) carriage means supported partially by said lifting frame, said carriage means being adapted for lateral movement relative to the lifting frame by dual horizontally oriented piston actuators which are each attached to the carriage means forward end, said carriage means being supported at its forward end by a guide surface sliding on a support rail, whereby said cover unit can be lowered from the coking drum lower flange and moved laterally aside to permit coke removal through the lower opening in the coking drum, and then reconnected to the coking drum lower flange.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US14858788A | 1988-01-26 | 1988-01-26 | |
| US148,587 | 1988-01-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1324973C true CA1324973C (en) | 1993-12-07 |
Family
ID=22526421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000582121A Expired - Lifetime CA1324973C (en) | 1988-01-26 | 1988-11-03 | Bottom unheading device and method for vertical vessels |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP0330295B1 (en) |
| JP (1) | JPH01190787A (en) |
| KR (1) | KR960013602B1 (en) |
| AR (1) | AR241787A1 (en) |
| CA (1) | CA1324973C (en) |
| DE (1) | DE68905944T2 (en) |
| ES (1) | ES2040991T3 (en) |
| MX (1) | MX169844B (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5228825A (en) * | 1991-11-01 | 1993-07-20 | The M. W. Kellogg Company | Pressure vessel closure device |
| US5500094A (en) * | 1994-06-30 | 1996-03-19 | The M. W. Kellogg Company | Coke drum deheading device |
| US5628603A (en) * | 1994-11-30 | 1997-05-13 | Fluor Corporation | Automated chute system |
| US6367843B1 (en) | 1997-02-03 | 2002-04-09 | Automated Connectors Holdings, L.B. | Remote operable fastener and method of use |
| EA001857B1 (en) * | 1997-02-03 | 2001-08-27 | Отомейтед Коннекторс, Инкорпорейтед | Remotely operable pressure vessel system |
| US6022454A (en) * | 1997-09-17 | 2000-02-08 | Fetzer; Kelly | Remotely operable pressure vessel system |
| US6039844A (en) * | 1998-10-09 | 2000-03-21 | Citgo Petroleum Corporation | Containment system for coke drums |
| DE102004031911C8 (en) * | 2004-07-01 | 2015-09-10 | Hydrokomp Hydraulische Komponenten Gmbh | Coupling system and valve plate assembly for the transmission of liquid and / or gaseous media |
| US7534326B1 (en) * | 2004-09-29 | 2009-05-19 | Conocophillipcs Company | Coke drum bottom unheading system |
| CN110055093B (en) * | 2019-05-08 | 2024-03-26 | 山东益大新材料股份有限公司 | Automatic airtight coke producing system |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2529046A (en) * | 1946-06-18 | 1950-11-07 | Padgett Grady | Discharge means for coke ovens |
| US2595245A (en) * | 1950-04-26 | 1952-05-06 | Kellogg M W Co | Apparatus for removing drum covers |
| US3379623A (en) * | 1964-04-16 | 1968-04-23 | James M. Forsyth | Bottom quick-opening door for coking tower or chamber |
| US4726109A (en) * | 1986-10-09 | 1988-02-23 | Foster Wheeler Usa Corporation | Unheading device and method for coking drums |
-
1988
- 1988-11-03 CA CA000582121A patent/CA1324973C/en not_active Expired - Lifetime
- 1988-11-18 JP JP63290330A patent/JPH01190787A/en active Granted
- 1988-12-07 MX MX014075A patent/MX169844B/en unknown
-
1989
- 1989-01-05 DE DE8989300068T patent/DE68905944T2/en not_active Expired - Lifetime
- 1989-01-05 ES ES198989300068T patent/ES2040991T3/en not_active Expired - Lifetime
- 1989-01-05 EP EP89300068A patent/EP0330295B1/en not_active Expired - Lifetime
- 1989-01-17 KR KR1019890000446A patent/KR960013602B1/en not_active Expired - Lifetime
- 1989-01-20 AR AR89313049A patent/AR241787A1/en active
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0461036B2 (en) | 1992-09-29 |
| AR241787A1 (en) | 1992-12-30 |
| DE68905944T2 (en) | 1993-07-22 |
| DE68905944D1 (en) | 1993-05-19 |
| ES2040991T3 (en) | 1993-11-01 |
| KR890011979A (en) | 1989-08-23 |
| JPH01190787A (en) | 1989-07-31 |
| EP0330295B1 (en) | 1993-04-14 |
| EP0330295A1 (en) | 1989-08-30 |
| KR960013602B1 (en) | 1996-10-09 |
| MX169844B (en) | 1993-07-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |
Effective date: 20101207 |