US3836434A - Process for decoking a delayed coker - Google Patents
Process for decoking a delayed coker Download PDFInfo
- Publication number
- US3836434A US3836434A US00238304A US23830472A US3836434A US 3836434 A US3836434 A US 3836434A US 00238304 A US00238304 A US 00238304A US 23830472 A US23830472 A US 23830472A US 3836434 A US3836434 A US 3836434A
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- United States
- Prior art keywords
- coke
- container
- nozzles
- cutting
- drill stem
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- 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
- C10B33/006—Decoking tools, e.g. hydraulic coke removing tools with boring or cutting nozzles
Definitions
- a substantial portion or all of the remainder of the coke in the container is removed by hydraulically cutting the coke in a substantially vertical direction by directing the water jet streams from the nozzles in a substantially vertical and downward direction against the horizontal surface of the coke in a series of radial incremental distances (which may be variable) substantially circumferentially across the surface of the coke.
- the drill stem is raised in the container, the nozzles are extended radially and the nozzles are then moved vertically from the top of the coke to the bottom thereof by lowering the drill stem as the coke is removed by the action of the water, thereby forming a varying, increasing-diameter, cylindrical void in the container through which passes the remainder of the coke that is removed in this manner.
- the production of coke by the delayed coking process involves the heating of a petroleum residual oil or pitch (or coal tar pitch) to a high temperature, and per mitting the residual heat of the coker feed to convert it to coke in a generally cylindrically shaped drum or container from which the coke is removed by mechanical and hydraulic decoking tools.
- the coke is initially cooled with steam, followed by a mixture of steam and water until the coke temperature is below 212F, after which the coke and drum are flooded with water to complete the cooling.
- a central pilot hole is then bored in the coke by lowering a drill stem which is provided with a conventional cutting head designed for boring the pilot hole with high pressure water.
- the initial cutting head is replaced by another cutting head and the drill stem is then inserted into and along the axis of the pilot hole.
- High pressure water jetting from the second cutting head breaks up and cuts the coke from the drum by being directed at it in a series of horizontal cutting intervals going progressively from the top to the bottom of the coke in the drum, during which the coke is removed from the bottom of the drum.
- the solid coke product removed from the drum is typically referred to as raw coke because it still contains a substantial percentage of organic volatile matter.
- the raw coke is then typically calcined to enhance its usefulness during which it is heated to a substantially higher temperature (e.g. about l,300C) than it was subjected to in the delayed coking drum and in which step its volatile matter content is substantially reduced.
- coke to be calcined have a minimum of fines and the lowest possible volatile matter.
- the fines create dusting problems in handling, storage and calcination of the coke and are of lower value than lump coke, and the volatile matter content is usually largely responsible for and inversely proportional to the calcined particle density of the coke.
- a high particle density is generally desired by the ultimate user of the coke.
- the coke producer is mainly interested in decoking the drum as rapidly as possible. Since a soft (high volatile) coke is easiest to cut, the coke producer is reluctant to reduce the volatile content to the levels desired by the calciners and ultimate users of the coke.
- the most commonly used decoking tools consist of two hydraulic cutting heads used in succession.
- the decoking tool used is operatively connected to a central drill stem which can be lowered through the coking drum and by means of which the decoking tool is supplied with water under pressure).
- the first head possesses a series of nozzles which are placed or directed in an essentially vertical manner and is used to cut the initial or pilot hole in the bed of coke.
- This head is then removed from the drill stem and replaced by a cutting head which uses two or four nozzles which direct water jets in an essentially horizontal manner.
- the drill stem is then progressively lowered in the drum a number of cutting intervals, during which intervals approximately horizontal layers of coke are cut from the coke bed.
- a modified cutter head using nozzles placed at a 20 to 30 angle above horizontal has been described and is being considered as a replacement for the conventional head.
- the distance between the nozzles and the cutting surface will tend to become relatively large in soft coke.
- this distance will become shorter and thus the greater cutting energy close to the nozzles can be brought to bear on the coke.
- the decoking tool of the present invention is just as efficient in a 40 foot diameter drum as in a foot drum.
- its efficiency is significantly greater than designs of the prior art because the decoking is accomplished with significantly lower water pressures and volumes since, as aforesaid, the cutting can be done at a short, relatively constant distance from the nozzles and in any event, at a more constant distance than when employing decoking techniques of the prior art.
- the operation involves a minimum of grinding and a maximum of cutting and the dislodged lumps are dropped directly into the pilot or central hole rather than being driven toward the wall of the coking drum.
- the tool or apparatus used in the decoking technique of the present invention consists of or includes, in combination: Water nozzles capable of directing water in jet streams in a substantially vertical and downward direction against the coke;
- a central drill stem which can be provided with water under pressure, capable of rotation and vertical movement within the coking container or drum, to which stem the jet nozzles are operatively mounted and coupled;
- the nozzles thus are also mounted on the drill stem by an arrangement which is capable of maintaining a constant nozzle distance from the surface of the coke while each vertical hole of progressively greater diameter is serially cut.
- FIGS. 26 Apparatus which makes possible the coke removal as indicated in these figures is illustrated primarily in FIGS. 7-12 and also in FIG. 1 which merely shows schematically some equipment features of the present invention.
- FIG. 7 is a front view of the mechanical and hydraulic valve cutter assembly and linking means mechanism which can be employed in the present invention and which make possible coke removal techniques such as have just been briefly described.
- FIG. 8 is a top plan view of the apparatus taken along line 8-8 of FIG. 7.
- FIG. 9 is a side or end view of the apparatus taken along line 9-9 of FIG. 7 (with the nozzle arms retracted).
- FIG. 10 is a top plan view (with the nozzle arms extended, or in horizontal position) of an alternate form of nozzle arrangement which can be employed in the present invention to carry out the variation illustrated in FIG. 5.
- FIG. 11 is a front view of the nozzle arrangement of FIG. 10.
- FIG. 12 is a view similar to FIG. 11 but wherein the linkage means to the nozzles are in the extended position, thereby rotating the nozzles into a substantially horizontal direction so as to carry out the process variation of FIG. 5.
- FIG. 1 there is schematically shown a typical environment or construction in which the device and/or process of the present invention are employed.
- the coking container 3 is surrounded by a construction or framework 10, similar to an oil well derrick, which is suitable for lowering drill stem 7 entirely through the container.
- This lowering can be accomplished through the use of a hydraulic or mechanical motor 8 suitably connected to the framework by support brackets 9.
- conventional equipment or means may be employed to raise and lower the drill stem, to rotate it at a suitable speed, and to supply water thereto.
- FIGS. 2-6 various coke removal steps .of the process of the present invention are illustrated schematically, it being appreciated that the steps illustrated are representative, and that more steps may be employed thanare actually illustrated.
- a substantially vertical and central pilot hole 1 has already been cut through the entire height of the coke 2 in the container 3 according to a procedure standard in the art.
- Container or drum 3 is about feet in length between upper opening 4 and lower opening 5.
- the opening 4 of the drum at the top is about 3 feet in diameter and the opening 5 of the drum at the bottom is about 5-6 feet in diameter.
- the initial distance between top opening 4 and the top surface 6 of the coke in the container, which is referred to as outage, is generally at least 10 or more feet.
- the drill stem was provided with water under pressure and this water was directed against the top surface of the coke through the cutting nozzle assembly.
- the initial cutter which was employed to cut the pilot hole through the coke is about -1 8 inches in diameter and results in a pilot hole 1 about 30 inches in diameter. (It should be appreciated that the openings and container dimensions, etc. of the figures are not scale drawings but are for purposes of explanation only).
- the drill stem driven either hydraulically or mechanically, was caused to rotate slowly such as at a speed of 2 to 4 revolutions per minute.
- the drill stem is typically about 100 feet long, or about feet longer than the container, in order to provide for connection to the drive means above the container and so that its lower end may extend to the bottom of the container.
- the drill stem is periodically lowered as the coke surface, against which the jet streams from the nozzles are directed, becomes progressively lower, until eventually the central pilot hole is cut through the entire height of the coke in the container.
- the coke removed from the container is typically cut either into a dewatering pit or directly into a railroad car for shipment to subsequent place of usage. What has been described thus far is a standard step or procedure in the art.
- the jet nozzles In such standard in the art nozzle arrangement and/or removal technique using same, the jet nozzles must of necessity always be located very close to the drill stem for accomodation in the pilot hole with the consequence that, for any given horizontal layer of coke removed, the distance between the coke being acted upon and the ends of the jet nozzles changes as the coke is progressively removed radially, commencing at the perimeter of the pilot hole and proceeding toward the container wall.
- a special final cutter assembly 11 illustrated schematically in FIGS. 2-6, and in detail in FIGS. 7-12, is then employed in the next sequence of steps.
- cutter assembly 11 is operatively mounted and coupled to a drill stem 7 but in the present invention this is accomplished by novel mechanical and hydraulic linking means, indicated schematically at 12, between water nozzles 13 and the central drill stem 7.
- FIG. 2 illustrates the cutter assembly mechanism of the present invention in a position in the coke container approximately midway during the first vertical cutting after the cutting of the pilot hole.
- the nozzles 13 are about halfway down the container. This typifies their position when the cutting action has taken place for some time and after the central drill stem 7 has been periodically lowered several feet in the container. It will be noted that the jet nozzles 13 are maintained in a substantially, but not exactly, vertical direction so that the jet streams from same are also directed in a substantially vertical direction against the coke, starting at the top surface of the coke in the container and finishing at the bottom thereof.
- the distance of the jet stream between the nozzlesl3 and the surface 14 of the coke being cut may vary depending on the hardness of the coke and the rate of lowering the drill stem but will be substantially constant for a given set of conditions as the drill stem is lowered in the container.
- the jet nozzles are directed at an angle slightly outward (radially) against the surface of the coke in order to provide a positive working clearance for the cutter assembly in the hole generated by the cutting action. It is thus seen that, when the step illustrated in FIG. 2 is completed, the diameter of the central hole in the container is substantially increased or enlarged as compared to the diameter of the initial pilot hole 1.
- the diameter of the central hole is progressively changed by about 2 to about 4 feet for each complete vertical cutting employed in the removal of the coke. (In the step illustrated in FIG. 2, the central pilot hole 1 was 2 /2 feet in diameter and the enlarged hole 15 was 5 /2 feet in diameter).
- the drill stem 7 was raised in the container and the setting of the cutter assembly 11 was charged by adjusting or altering the positioning of the linking means 12 in order to increase the diameter of the hole being cut in the container, as illustrated in FIG. 3. More will be said later on when describing FIGS. 7-12 as to what was done in order to make this change, it sufficing for the present to state that the change can be effected from outside the container and that after the change, the water nozzles 13 are still in a substantially vertical direction. It was thus possible to carry out the cutting step illustrated schematically in FIG. 3 in substantially the same manner as the cutting step of FIG.
- the last vertical cutting will be carried out in such a manner as illustrated in FIG. 4 leaving a tube 17 of the coke around the wall of the container, which tube is then removed in a manner as illustrated in FIG. 5.
- the last such vertical cutting may also remove the tube of coke from the wall of the container, as illustrated in FIG. 6.
- the diameter of the central hole is increased to a point where the coke remaining in the container is substantially in the shape of a hollow tube or annulus 17 with a wall thickness which typically may be from 2 to 3 feet. Because this wall thickness is around the circumference of the container, the volume of the coke remaining in the container is still very substantial. Because it is difficult to remove this coke in a controllable manner (huge portions or sections of the coke may fall away from the container wall at once) and also because of possible damage to the bottom of the container and/or to railroad cars beneath the container, and/or of overloading of same, it is preferable to carry out the final cutting in a manner as illustrated in FIG.
- the coke is removed by directing the water nozzles 13 in a substantially hori zontal direction, (apparatus features which make this possible are described hereinafter) whereas in the step illustrated in FIG. 6, the coke is removed by directing the water nozzles at the coke in a substantially vertical direction just as it is in the steps illustrated in FIGS. 2, 3 and 4.
- the final cutter assembly indicated generally at 1 l, includes drill stem extension 11a, linking means indicated generally at 12, nozzles 13 and such other features as are necessary to carry out the present invention.
- the cutter assembly is connected or operatively mounted and coupled, mechanically and hydraulically, to the drill stem at the quick release joint or quick disconnect coupling 7a.
- the cutter assembly is made up of several parts both mechanical and hydraulic, which are operatively linked to the drill stem so that the jet nozzles 13 of the valve assembly can be provided with water and also so that the jet nozzles can be lowered in the container and also extended radially to carry out the hydraulic cuttings of the coke in the manner previously described.
- swivel connector 18 connected to drill stem extension 11a, which swivel connector is capable of mechanically supporting the remaining parts of the cutting apparatus and of also serving as a part of the conduit system for the water from 11a to the nozzles 13.
- the remainder of the water conduit system is made up of swivel joint 19, water line 20 and swivel joint 21 on the right side of FIG. 7 and their counterparts 19a, 20a and 21a on the left side of FIG. 7.
- the highpressure swivel joints 19, 19a, 21 and 21a are well known in the hydraulics art.
- swivel joints which will satisfactorily carry out the desired functions in the present invention are commercially provided by the FMC Corporation, Chiksan Division, Brea, Calif, Joint Style No. 40 being particularly suitable.
- Conventional couplings 22 are used throughout the system to connect the various swivel joints, water lines and nozzles.
- Lever arms 23, 24, 25 and 26 provide part of the mechanical means for controlling the radial positioning of the nozzle 13 on one side of the cutter and lever arms 23a, 24a, 25a and 26a do the same on the other side of the cutter.
- the radial positioning of these arms is controlled by moter 27, drive screw 28 and drive nut 29.
- Motor 27 is typically of the hydraulic or pneumatic type and is illustrated as being attached to connector 18 by mechanical support means 30.
- the positioning of this support means 30 may be varied which in turn can be used as a control for the vertical positioning of the hydraulic motor and consequently, to some degree, the radial extension of the nozzles 13.
- the dimensions or lengths of the various lever arms and water lines can be varied in order to provide for the desired amount of the radial extension of the nozzles.
- Control 31 e.g., a valve
- Motor 27 Opening and closing this valve thus controls the running of motor 27 which in turn determines the turning and adjustment of drive screw 28 in drive nut 29.
- the threading of drive screw 28 into and through nut 29 causes the vertical raising of the drive nut and the radial extending of the lever arms and consequently of nozzles 13.
- Maximum lifting of drive nut 29 results in maximum radial extension of the cutter system, during which the angle at which lever arms 23 and 23a intersect at the drive nut 29 increases substantially and causes lever arms 24 and 24a to go from a vertical position to a horizontal position.
- Lever arms 25 and 25a complete the forming of parallelograms C E H G and C, E, H, G, the line C E always remaining parallel to the line G H, as is true also of the line C, E, to the line G, H,.
- the direction of the jet nozzles 13 relative to the axis of the drill stem remains constant.
- Valve 32 is used in the operation of hydraulic cylinders used in connection with control arms employed in the embodiment of the invention described in connection with FIG. 5, which embodiment is also described in more detail hereinafter in connection with FIGS. -12.
- Drill stem extension 11a shown in cut-away view in FIG. 7, may be of variable length, but must be long enough so that when the drill stem is raised after a complete vertical cutting, the valve 31 will be above container opening 4 so that it may be opened and closed to operate the motor, so that the next desired radial positioning of the nozzles can be effectuated.
- valve 32 if the embodiment of FIGS. 10-12 is to be employed.
- the drive nut 29 will be coupled to an indicator device so that when the drill stem is raised a reading or observation coordinated to the extent of vertical movement of the drive nut will inform the operator of the amount of radial extension of the nozzles 13. He will thus be able to accurately adjust the cutting diameter for each vertical pass up to and including the final cut.
- FIGS. 8 and 9 which are top and side views of the apparatus, are set forth in order to complete the illustration from different perspectives of how the various parts of the apparatus are assembled. The description and function of the various numbered parts of these figures are clear from the detailed description of these same parts and their functions in connection with the earlier discussion of FIG. 7.
- FIGS. 1012 also illustrate several parts of the apparatus which have already been previously described and, therefore, such correspondingly numbered parts require no further discussion.
- lever arm 24 has been partially replaced by parts numbered 35, 36, 37 and 38.
- lever arm 24 is fixed in its length throughout the entire decoking operation, with the result that lever arm 25 stays at the same relative angle a (with respect to horizontal) throughout the various decoking steps.
- lever arm 24 is partially replaced by hydraulic cylinder 36, hydraulically actuated pushrod 37, connecting arm and coupling means 38.
- the opening and closing of valve 32 actuates hydraulic cylinder 36 with the result that the cylinder piston (not shown) controllably extends push-rod 37 from said cylinder.
- fixed-in-length lever arm 24 is partially replaced by a variable length linkage which can be employed to controllably change the angle (a) which lever arm 25 makes with horizontal (changing from obtuse to acute), thus also changing the angle of the nozzle 13 from a substantially vertical direction to a substantially horizontal direction in order to carry out the removal step as illustrated in FIG. 5.
- the modification of the mechanism illustrated in FIGS. 1012 permits rotation of the cutter head and elevation of the nozzles to the horizontal or near horizontal to make a final cleaning of the coke drum walls. Since the extension means prevents raising the cutting head to the very top of the drum, occasionally or each time the drill stem is raised upon the completion of a cylindrical cutting, the heads can at that moment be temporarily rotated to horizontal (or even above horizontal) by operating valve 32 to clean the upper part of the drum before returning the nozzles to their substantially vertical and downward direction and carrying out the next vertical cylindrical cutting.
- a process for removing coke from a delayed coking container which comprises first cutting a vertical and central pilot hole through the entire height of the coke in the container, the improvement which comprises removing a substantial portion or all of the remainder of the coke in the container by a series of subsequent incremental cylindrical and vertical, hydraulic cuttings of the coke, each of said hydraulic cuttings in the series being carried out by directing water jet streams through nozzles in a substantially vertical downward direction against the coke starting at the top of the coke in the container and finishing at the bottom thereof, each succeeding incremental cylindrical hydraulic cutting in the series being carried out in the same manner but each such cutting substantially enlarging the diameter of the central hole in the container by radial movement of the nozzles.
- a process according to claim 4 wherein the rate of lowering said central drill stem is controllable and may be varied depending upon the hardness of the coke to be removed from the container.
- a process for the removal of coke from a delayed coking container which comprises first cutting a vertical and central pilot hole through the coke and then removing the remainder of the coke, the improvement which comprises removing a substantial portion or all of the remainder of the coke by hydraulically cutting the coke by directing water from jet nozzles in a substantially vertical and downward direction against the horizontal surface of the coke in a series of radial incremental distances, which may be variable, substantially circumferentially across the surface of the coke and, after each radial incremental movement of the nozzles, moving the nozzles in a vertical manner from the top of the coke in the container to the bottom thereof as the coke is removed by the action of the water, to thereby form a varying increasing diameter cylindrical void in the container for removal of the coke therethrough.
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- Organic Chemistry (AREA)
- Coke Industry (AREA)
Abstract
Description
Claims (5)
- 2. A process according to claim 1 wherein the initial pilot hole cut through the coke is about 2 1/2 feet in diameter and wherein each subsequent incremental vertical, cylindrical cutting of the coke enlarges the diameter of the central hole in the container by from about 2 to about 4 feet.
- 3. A process according to claim 1 wherein a substantial portion of the coke in the container is removed in the manner set forth but wherein the final coke in the container situated near the wall of same is removed by directing the jet streams in a substantially horizontal rather than substantially vertical direction.
- 4. In a process for removing coke from a delayed coking container which comprises first cutting a vertical and central pilot hole through the entire height of the coke in the container, the improvement which comprises removing a substantial portion or all of the remainder of the coke in the container by a series of subsequent incremental cylindrical and vertical, hydraulic cuttings of the coke, each of said hydraulic cuttings in the series being carried out by directing water jet streams in a substantially vertical and downward direction against the coke starting at the top of the coke in the container and finishing at the bottom thereof, each succeeding incremental cylindrical hydraulic cutting in the series being carried out in the same manner but each such cutting substantially enlarging the diameter of the central hole in the container; said jet streams emanating from nozzles operatively mounted and coupled by mechanical and hydraulic linking means to a central drill stem, said linking means permitting a changing radius movement of the nozzles upon completion of each individual cylindrical cutting while simultaneously maintaining the nozzles in the same substantially vertical direction, each changing radius movement causing the aforesaid enlargement of the diameter of the central hole in the container, said central drill stem also slowly rotating and being progressively lowered in the container during each of the cylindrical and vertical cuttings of the coke so as to enable the jet streams from the nozzles coupled thereto to cut the coke in the aforesaid cylindrical fashion going from the top to the bottom of the container.
- 5. A process according to claim 4 wherein the rate of lowering said central drill stem is controllable and may be varied depending upon the hardness of the coke to be removed from the container.
- 6. In a process for the removal of coke from a delayed coking container which comprises first cutting a vertical and central pilot hole through the coke and then removing the remainder of the coke, the Improvement which comprises removing a substantial portion or all of the remainder of the coke by hydraulically cutting the coke by directing water from jet nozzles in a substantially vertical and downward direction against the horizontal surface of the coke in a series of radial incremental distances, which may be variable, substantially circumferentially across the surface of the coke and, after each radial incremental movement of the nozzles, moving the nozzles in a vertical manner from the top of the coke in the container to the bottom thereof as the coke is removed by the action of the water, to thereby form a varying increasing diameter cylindrical void in the container for removal of the coke therethrough.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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US00238304A US3836434A (en) | 1972-03-27 | 1972-03-27 | Process for decoking a delayed coker |
US463581A US3880359A (en) | 1972-03-27 | 1974-04-24 | Apparatus for decoking a delayed coker |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US00238304A US3836434A (en) | 1972-03-27 | 1972-03-27 | Process for decoking a delayed coker |
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US3836434A true US3836434A (en) | 1974-09-17 |
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US00238304A Expired - Lifetime US3836434A (en) | 1972-03-27 | 1972-03-27 | Process for decoking a delayed coker |
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Cited By (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3985572A (en) * | 1974-11-04 | 1976-10-12 | Georgia-Pacific Corporation | Automatic spray cleaning apparatus and method |
US4013518A (en) * | 1975-01-27 | 1977-03-22 | Stephen John Miko | Water jet cleaner for standpipes |
US4100035A (en) * | 1975-10-03 | 1978-07-11 | Continental Oil Company | Apparatus for quenching delayed coke |
US4168224A (en) * | 1977-02-14 | 1979-09-18 | The Standard Oil Company (Ohio) | Coking drum and process for forming improved graphite coke |
US4196050A (en) * | 1977-02-04 | 1980-04-01 | Kureha Kagaku Kogyo Kabushiki Kaisha | Decoking apparatus |
US4224108A (en) * | 1977-02-04 | 1980-09-23 | Kureha Kagaku Kogyo Kabushiki Kaisha | Decoking apparatus |
US4234541A (en) * | 1979-03-02 | 1980-11-18 | Leco Corporation | Combustion chamber cleaning apparatus |
US4243633A (en) * | 1975-10-22 | 1981-01-06 | Kureha Kagaku Kogyo Kabushiki Kaisha | Reactor for the thermal cracking of heavy oil |
US4410398A (en) * | 1982-02-22 | 1983-10-18 | Shell Oil Company | Method and apparatus for monitoring the cutting of coke in a petroleum process |
US4500492A (en) * | 1982-09-08 | 1985-02-19 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Apparatus and method to keep the walls of a free-space reactor free from deposits of solid materials |
EP0155757A2 (en) * | 1984-02-22 | 1985-09-25 | Conoco Phillips Company | Method and apparatus for de-coking |
US4690159A (en) * | 1985-12-17 | 1987-09-01 | Vadakin, Inc. | Rotary cleaning device |
US4726109A (en) * | 1986-10-09 | 1988-02-23 | Foster Wheeler Usa Corporation | Unheading device and method for coking drums |
US4738399A (en) * | 1985-11-25 | 1988-04-19 | Dresser Industries, Inc. | Decoking tool |
DE3809077A1 (en) * | 1988-03-18 | 1989-09-28 | Gewerk Eisenhuette Westfalia | Process and equipment for discharging petroleum coke from a coking chamber |
DE4042036A1 (en) * | 1990-01-10 | 1991-07-11 | Wintershall Ag | Removal of solidified coke produced in crude oil distn. - by milling arrangement which saves energy |
US5381811A (en) * | 1994-03-02 | 1995-01-17 | C.H. Heist Corp. | Furnace cleaning apparatus |
USRE36465E (en) * | 1994-03-02 | 1999-12-28 | C.H. Heist Corp. | Furnace cleaning apparatus |
US6050277A (en) * | 1998-11-09 | 2000-04-18 | Ingersoll-Dresser Pump Company | Decoking tool carrier with a self-propelled climbing crosshead |
WO2009091883A1 (en) * | 2008-01-15 | 2009-07-23 | Spraying Systems Co. | Adjustable lance spray assembly |
CN104073270A (en) * | 2013-03-29 | 2014-10-01 | 上海宝钢化工有限公司 | Decoking device and method thereof for delayed coke coking tower |
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Non-Patent Citations (1)
Title |
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Cited By (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3985572A (en) * | 1974-11-04 | 1976-10-12 | Georgia-Pacific Corporation | Automatic spray cleaning apparatus and method |
US4013518A (en) * | 1975-01-27 | 1977-03-22 | Stephen John Miko | Water jet cleaner for standpipes |
US4100035A (en) * | 1975-10-03 | 1978-07-11 | Continental Oil Company | Apparatus for quenching delayed coke |
US4243633A (en) * | 1975-10-22 | 1981-01-06 | Kureha Kagaku Kogyo Kabushiki Kaisha | Reactor for the thermal cracking of heavy oil |
US4196050A (en) * | 1977-02-04 | 1980-04-01 | Kureha Kagaku Kogyo Kabushiki Kaisha | Decoking apparatus |
US4224108A (en) * | 1977-02-04 | 1980-09-23 | Kureha Kagaku Kogyo Kabushiki Kaisha | Decoking apparatus |
US4168224A (en) * | 1977-02-14 | 1979-09-18 | The Standard Oil Company (Ohio) | Coking drum and process for forming improved graphite coke |
US4234541A (en) * | 1979-03-02 | 1980-11-18 | Leco Corporation | Combustion chamber cleaning apparatus |
US4410398A (en) * | 1982-02-22 | 1983-10-18 | Shell Oil Company | Method and apparatus for monitoring the cutting of coke in a petroleum process |
US4500492A (en) * | 1982-09-08 | 1985-02-19 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Apparatus and method to keep the walls of a free-space reactor free from deposits of solid materials |
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