CA1098479A - Apparatus for cleaning the doors of coking ovens - Google Patents
Apparatus for cleaning the doors of coking ovensInfo
- Publication number
- CA1098479A CA1098479A CA283,823A CA283823A CA1098479A CA 1098479 A CA1098479 A CA 1098479A CA 283823 A CA283823 A CA 283823A CA 1098479 A CA1098479 A CA 1098479A
- Authority
- CA
- Canada
- Prior art keywords
- door
- nozzles
- frame
- sealing edge
- plug
- 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
Links
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
- C10B43/00—Preventing or removing incrustations
- C10B43/02—Removing incrustations
- C10B43/08—Removing incrustations with liquids
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Coke Industry (AREA)
- Cleaning By Liquid Or Steam (AREA)
- Cleaning In General (AREA)
Abstract
Abstract of the Disclosure An apparatus for cleaning coking oven doors having a sealing edge for placing on the door frame. The doors are adapted to be driven to be placed in front of the apparatus which is provided with nozzles for discharging pressurized water on the door regions which are situated close to the sealing edge and are covered with encrusted deposits. The apparatus is characterized in that a pair of nozzles, which is situated on both sides of the inward-driven door is aimed at the gap between the sealing edge and a door plug. The nozzles are connected to a pressurized water supply duct and are placed at a distance from each other equivalent to approximately half the door height. The nozzles are disposed in a vertically adjustable frame so that the top and bottom angle subtended by the sealing edge can be subjected to pressurized water, namely by the top nozzles in the top position and by the bottom nozzles in the bottom position. The top nozzles are pivotable in the top limiting position and the bottom nozzles are pivot-able in the bottom limiting position so as to bias the regions of the door situated at the top and at the bottom horizontal portion of the sealing edge. The nozzles are disposed on horizontal inwardly pivotable tubes which are situated on both sides of the plug of the inward-driven door and are connected to the supply duct for pressurized water.
Description
~84~9 The invention relates to apparatus, so adapted that coking oven doors, having a sealing edge for placing on the door frame, can be driven for cleaning purposes in front of said apparatus which is provided with nozzles for discharging pressurized water on to the door regions which are situated close to the sealing edge and are covered with encrusted deposits.
It is known that the parts which are to provide a metal-to-metal seal in coking ovens between the door member and the door frame are contaminated with tarry deposits which often harden into crusts and are produced by condensation from the constituents of the gas that is produced in coking. Cleaning of the doors by mechanical cleaning elements is not always satisfactory. Very costly and complicated machines, equipped with rotating parts, are occasionally used to this end.
Attempts were therefore made to find other means for cleaning doors with metal-to-metal seals. The prior art already discloses a method for cleaning the doors and door frames of coking ovens by means of high pressure fluid nozzles which remove the deposits on the sealing surfaces of the door and door frames by means of jets of high pressure fluid, discharged upon the sealing surfaces at a pressure of 200 atm gauge. The apparatus with the high pressure fluid nozzles should be traversable and should travel in front of the door frames or of the lifted-off doors. Overlapping spray cones of water are discharged from nozzles which are distributed over the entire sealing surface of the door or of the frame.
The inventor has found that water is unsuitable as a cleaning agent for cleaning the door frames because removal of the water discharged for cleaning leads to difficulties on the oven platforms. It was also recognized that it is not important - 1 - ~
109~3479 to clean the sealing edges but to clean the region between the sealing edge and the door plug because this region is liable to be affected by crust-like deposits the structure of which can be loosened in some cases only by using pressurized water jets of very high pressure.
The inventor has also recognized that pressures of the kind necessary to remove encrusted dirt from between the door plug and the sealing edge can be obtained only by using a single nozzle.
The invention, the object of which is also to effect door cleaning by means of pressurized water, therefore proceeds from the fact that only a few pressurized nozzles can be simul-taneously actuated and arrives at a suitable solution of the problem by arranging the nozzles to traverse in the cleaning device in the vertical direction thereof so that a substantial portion of the contaminated region between the sealing edge and the door plug can be treated with a single nozzle.
In apparatus, so adapted that coking doors, having a sealing edge for placing on the door frame, can be driven for cleaning purposes in front of said apparatus, the invention proposes that a pair of nozzles, which is situated on both sides of the inward-driven door, i9 aimed at the gap between the sealing edge and the door plug and is spaced at a distance from each other equivalent to approximately half the door height, is disposed in a vertically adjustable frame, so that the top and bottom angle subtended by the sealing edge can be subjected to pressurized water, namely by the top nozzle in the top position and by the bottom nozzle in the bottom position.
In the top limiting position the top nozzles ca~ be pivoted and in the bottom limiting position the bottom nozzles can be pivoted to the middle of door regions situated on the , , ~
top and bottom horizontal portion of the sealing edge so that the said regions can be subjected to pressurized water for cleaning purposes.
Advantageously, the nozzles are disposed in horizontal tubes which are situated on both sides of the plug of the inward-driven door and are connected to pres-surized water ducts and the said tubes can be inwardly pivoted.
According to the invention, the frame which supports the nozzle tubes can traverse by means of rollers on the track rails of a vertical support column and can thus rise and fall.
To protect the traversing frame against heat radiated by the door plug, a thermally insulating protec-tive sheath which surrounds the door plug is provided on the frame between the pivotable horizontal nozzle tubes situated at the top and bottom of the frame when the door is in the inward-driven positior.
According to al~broad aspect of the present invention there is provided an apparatus for cleaning the regions of coke oven doors between a surrounding sealing edge and a refractory door plug~ The apparatus comprises a frame vertically reciprocable along the end of a coke oven door which carries the sealing plug. A
first pair of nozzles is carried on the upper portion of the frame and arranged to force fluid into the upper portions of those regions of the coke oven door between a surrounding sealing edge and the door plug. A second pair of nozzles is carried on the lower portion of the frame and arranged to force fluid into the lower portions of those regions of the coke oven door between the ~'v~' surrounding sealing edge and the door plug. The nozzles are pivotal about generally vertical axes such that the first pair of nozzles can be pivoted inwardly when they reach the upper edge of the coke oven door upon upward movement of the frame to clean the region between the upper edge of the door plug and the upper horizontally-extending portion of the sealing edge. The second pair of nozzles is pivotal inwardly when they reach the lower edge of the coke oven door upon downward movement of the frame to clean the region between the lower edge of the door plug and the lower horizontally-extending portion of the sealing edge.
In the accompanying drawings:-FIGURE 1 is a side view of the apparatus accord-ing to the invention with a raised coke oven door driven in front of the apparatus for cleaning purposes, FIGURE 2 is a section of Figure 1 to an enlarged scale:
FIGURE 3 is a vertical section along the line III-III of Figure l;
FIGURE 4 is a vertical section corresponding to the line IV-IV of Figure 1 through the frame which supports the traversable nozzle tube, FIGURE 5 is a horizontal section according to the line V-V of Figure 1 and shows a partial plan view the rise and fall frame of the door cleaner; and FIGURE 6 is a horizontal section according to the line VI-VI of Figure 1.
As can be seen more particularly by reference to Figures 1 and 5, the door to be cleaned has a door member 10 of U-shaped cross-section. Situated on the door member are the sealing edge 31, clamped by means of hook bolts 30, and the R
'8479 refractory door plug 33, surrounded by the metallic plug holder 32, More or less crusty, tarry deposits are usually formed during the coking operation directly in the space situated between the door plug 33 and the sealing edge 31, the removal of which said deposits is the main object of the novel apparatus.
The door which i9 lifted off the oven by known devices is driven in ~ront of apparatus according to the invention for the purpose of cleaning.
Apparatus of this kind can be fixedly installed on a coke guide car or on the coke pushing machine and can be arranged so that the removed door can be driven into said apparatus with the side of its refractory plug, the sealing edge being nearest to the cleaning apparatus.
The cleaning apparatus extends between a top roof member 35 and a baseplate 36 and comprises a rigid support column 11 with track rails 12 and 13. The frame which supports the nozzle tubes can reciprocate vertically upon the said support column. The frame comprises a fixed rear wall 14 and a plurality of su~stantially square frames 34 mounted thereon.
The frame can be ralsed and lowered by the lifting device which can be constructed as a hydraulically actuated jack 28.
Figures 1 and 2 show the frame in its lowest position.
A total of four roller holders 35 with rollers 15 which are rotatable about horizontal axes and run on both sides on the track rails 12 and 13 of the support column 11 are situ-ated on both side parts of the frames 34. The rollers 16 run on the outsides of the track rails 12 and 13 and rotate about horizontal axes which are situated perpendicularly to those of the rollers 15.
l~q8479 The nozzle tubes 18 and 19 are supported at the top end of the frame and the nozzle tubes 20 and 21 are supported at the bottom end of the frame so as to be pivot~ble about the pivoting points 24 to 27, In the inoperative position the nozzle tubes 18 to 21 are situated parallel with the side walls of the refractory plug 33. The said nozzle tubes are able to pivot due to their rear ends being coupled to the piston rods 22 of the two double-acting jacks 23 (Figure 5 shows a nozzle tube in hatched form in the inward pivoted position). A
thermally insulating shield 17 which surrounds the refractory plug 33 of the inward-driven door is arranged on the front of the frame between the two planes in which the tubes 18 and 19 are situated on the one hand and the tubes 20 and 21 are situ-ated on the other hand.
Pressurized water is supplied to the nozzle tubes 18 to 21 from the connecting duct 29 through the duct 39 to the tube 19 and from there via the duct 40 to the tube 18, then through the line 41 to the tube 21 and thereafter to the tube 20 through a connection 42 which corresponds to the line 40.
A valve member is installed into the supply duct of each indi-vidual tube so that each individual nozzle tube or each group of nozzle tubes can be supplied separately with pressurized water, To operate the apparatus the top nozzle tubes 19 and 20 are biased after the lifted door is driven into the cleaning apparatus which can be in the position illustrated in Figure 1 and the frame is then slowly moved by the lifting device 28 into the top limiting position. Spraying the pressurized water into the region situated between the door plug 33 and the sealing edge 31 flushes away the accretions situated thereat. The upper of the two cylinders 22 is operated when the frame reaches its top limiting position. The piston rods 23 cause the tubes 18 and 19 to pivot inwardly to effect cleaning between the top cross-member of the sealing edge 31.
After shutting off and pivoting back of the nozzle tubes 18 and 19 the two bottom nozzle tubes 20 and 21 are then biased and the frame is slowly lowered into its bottom position' the gap between the sealing edge and the refractory plug is then cleaned in the bottom half of the door member. On arrival at the bottom limiting position the lower of the cylinders 22 is actuate~ and the bottom nozzle tubes 20 and 21 are pivoted in-wardly so that the region of the bottom cross-member of the sealing edge is cleaned. The supply of pressurized water to the tubes 20 and 21 is shut down after the inward pivoting operation and the tubes 20 and 21 are returned into their starting position by means of the bottom thrust jacks 22.
Cleaning of the door is thus completed.
A plurality of nozzles each of which is individually closable can be arranged in uniform distribution on the frame instead of only one pair of nozzles arranged on both sides of the apparatus, in which case the dimensions of the frame are higher than half the door height. The lifting height of the frame is reduced in this case.
It is known that the parts which are to provide a metal-to-metal seal in coking ovens between the door member and the door frame are contaminated with tarry deposits which often harden into crusts and are produced by condensation from the constituents of the gas that is produced in coking. Cleaning of the doors by mechanical cleaning elements is not always satisfactory. Very costly and complicated machines, equipped with rotating parts, are occasionally used to this end.
Attempts were therefore made to find other means for cleaning doors with metal-to-metal seals. The prior art already discloses a method for cleaning the doors and door frames of coking ovens by means of high pressure fluid nozzles which remove the deposits on the sealing surfaces of the door and door frames by means of jets of high pressure fluid, discharged upon the sealing surfaces at a pressure of 200 atm gauge. The apparatus with the high pressure fluid nozzles should be traversable and should travel in front of the door frames or of the lifted-off doors. Overlapping spray cones of water are discharged from nozzles which are distributed over the entire sealing surface of the door or of the frame.
The inventor has found that water is unsuitable as a cleaning agent for cleaning the door frames because removal of the water discharged for cleaning leads to difficulties on the oven platforms. It was also recognized that it is not important - 1 - ~
109~3479 to clean the sealing edges but to clean the region between the sealing edge and the door plug because this region is liable to be affected by crust-like deposits the structure of which can be loosened in some cases only by using pressurized water jets of very high pressure.
The inventor has also recognized that pressures of the kind necessary to remove encrusted dirt from between the door plug and the sealing edge can be obtained only by using a single nozzle.
The invention, the object of which is also to effect door cleaning by means of pressurized water, therefore proceeds from the fact that only a few pressurized nozzles can be simul-taneously actuated and arrives at a suitable solution of the problem by arranging the nozzles to traverse in the cleaning device in the vertical direction thereof so that a substantial portion of the contaminated region between the sealing edge and the door plug can be treated with a single nozzle.
In apparatus, so adapted that coking doors, having a sealing edge for placing on the door frame, can be driven for cleaning purposes in front of said apparatus, the invention proposes that a pair of nozzles, which is situated on both sides of the inward-driven door, i9 aimed at the gap between the sealing edge and the door plug and is spaced at a distance from each other equivalent to approximately half the door height, is disposed in a vertically adjustable frame, so that the top and bottom angle subtended by the sealing edge can be subjected to pressurized water, namely by the top nozzle in the top position and by the bottom nozzle in the bottom position.
In the top limiting position the top nozzles ca~ be pivoted and in the bottom limiting position the bottom nozzles can be pivoted to the middle of door regions situated on the , , ~
top and bottom horizontal portion of the sealing edge so that the said regions can be subjected to pressurized water for cleaning purposes.
Advantageously, the nozzles are disposed in horizontal tubes which are situated on both sides of the plug of the inward-driven door and are connected to pres-surized water ducts and the said tubes can be inwardly pivoted.
According to the invention, the frame which supports the nozzle tubes can traverse by means of rollers on the track rails of a vertical support column and can thus rise and fall.
To protect the traversing frame against heat radiated by the door plug, a thermally insulating protec-tive sheath which surrounds the door plug is provided on the frame between the pivotable horizontal nozzle tubes situated at the top and bottom of the frame when the door is in the inward-driven positior.
According to al~broad aspect of the present invention there is provided an apparatus for cleaning the regions of coke oven doors between a surrounding sealing edge and a refractory door plug~ The apparatus comprises a frame vertically reciprocable along the end of a coke oven door which carries the sealing plug. A
first pair of nozzles is carried on the upper portion of the frame and arranged to force fluid into the upper portions of those regions of the coke oven door between a surrounding sealing edge and the door plug. A second pair of nozzles is carried on the lower portion of the frame and arranged to force fluid into the lower portions of those regions of the coke oven door between the ~'v~' surrounding sealing edge and the door plug. The nozzles are pivotal about generally vertical axes such that the first pair of nozzles can be pivoted inwardly when they reach the upper edge of the coke oven door upon upward movement of the frame to clean the region between the upper edge of the door plug and the upper horizontally-extending portion of the sealing edge. The second pair of nozzles is pivotal inwardly when they reach the lower edge of the coke oven door upon downward movement of the frame to clean the region between the lower edge of the door plug and the lower horizontally-extending portion of the sealing edge.
In the accompanying drawings:-FIGURE 1 is a side view of the apparatus accord-ing to the invention with a raised coke oven door driven in front of the apparatus for cleaning purposes, FIGURE 2 is a section of Figure 1 to an enlarged scale:
FIGURE 3 is a vertical section along the line III-III of Figure l;
FIGURE 4 is a vertical section corresponding to the line IV-IV of Figure 1 through the frame which supports the traversable nozzle tube, FIGURE 5 is a horizontal section according to the line V-V of Figure 1 and shows a partial plan view the rise and fall frame of the door cleaner; and FIGURE 6 is a horizontal section according to the line VI-VI of Figure 1.
As can be seen more particularly by reference to Figures 1 and 5, the door to be cleaned has a door member 10 of U-shaped cross-section. Situated on the door member are the sealing edge 31, clamped by means of hook bolts 30, and the R
'8479 refractory door plug 33, surrounded by the metallic plug holder 32, More or less crusty, tarry deposits are usually formed during the coking operation directly in the space situated between the door plug 33 and the sealing edge 31, the removal of which said deposits is the main object of the novel apparatus.
The door which i9 lifted off the oven by known devices is driven in ~ront of apparatus according to the invention for the purpose of cleaning.
Apparatus of this kind can be fixedly installed on a coke guide car or on the coke pushing machine and can be arranged so that the removed door can be driven into said apparatus with the side of its refractory plug, the sealing edge being nearest to the cleaning apparatus.
The cleaning apparatus extends between a top roof member 35 and a baseplate 36 and comprises a rigid support column 11 with track rails 12 and 13. The frame which supports the nozzle tubes can reciprocate vertically upon the said support column. The frame comprises a fixed rear wall 14 and a plurality of su~stantially square frames 34 mounted thereon.
The frame can be ralsed and lowered by the lifting device which can be constructed as a hydraulically actuated jack 28.
Figures 1 and 2 show the frame in its lowest position.
A total of four roller holders 35 with rollers 15 which are rotatable about horizontal axes and run on both sides on the track rails 12 and 13 of the support column 11 are situ-ated on both side parts of the frames 34. The rollers 16 run on the outsides of the track rails 12 and 13 and rotate about horizontal axes which are situated perpendicularly to those of the rollers 15.
l~q8479 The nozzle tubes 18 and 19 are supported at the top end of the frame and the nozzle tubes 20 and 21 are supported at the bottom end of the frame so as to be pivot~ble about the pivoting points 24 to 27, In the inoperative position the nozzle tubes 18 to 21 are situated parallel with the side walls of the refractory plug 33. The said nozzle tubes are able to pivot due to their rear ends being coupled to the piston rods 22 of the two double-acting jacks 23 (Figure 5 shows a nozzle tube in hatched form in the inward pivoted position). A
thermally insulating shield 17 which surrounds the refractory plug 33 of the inward-driven door is arranged on the front of the frame between the two planes in which the tubes 18 and 19 are situated on the one hand and the tubes 20 and 21 are situ-ated on the other hand.
Pressurized water is supplied to the nozzle tubes 18 to 21 from the connecting duct 29 through the duct 39 to the tube 19 and from there via the duct 40 to the tube 18, then through the line 41 to the tube 21 and thereafter to the tube 20 through a connection 42 which corresponds to the line 40.
A valve member is installed into the supply duct of each indi-vidual tube so that each individual nozzle tube or each group of nozzle tubes can be supplied separately with pressurized water, To operate the apparatus the top nozzle tubes 19 and 20 are biased after the lifted door is driven into the cleaning apparatus which can be in the position illustrated in Figure 1 and the frame is then slowly moved by the lifting device 28 into the top limiting position. Spraying the pressurized water into the region situated between the door plug 33 and the sealing edge 31 flushes away the accretions situated thereat. The upper of the two cylinders 22 is operated when the frame reaches its top limiting position. The piston rods 23 cause the tubes 18 and 19 to pivot inwardly to effect cleaning between the top cross-member of the sealing edge 31.
After shutting off and pivoting back of the nozzle tubes 18 and 19 the two bottom nozzle tubes 20 and 21 are then biased and the frame is slowly lowered into its bottom position' the gap between the sealing edge and the refractory plug is then cleaned in the bottom half of the door member. On arrival at the bottom limiting position the lower of the cylinders 22 is actuate~ and the bottom nozzle tubes 20 and 21 are pivoted in-wardly so that the region of the bottom cross-member of the sealing edge is cleaned. The supply of pressurized water to the tubes 20 and 21 is shut down after the inward pivoting operation and the tubes 20 and 21 are returned into their starting position by means of the bottom thrust jacks 22.
Cleaning of the door is thus completed.
A plurality of nozzles each of which is individually closable can be arranged in uniform distribution on the frame instead of only one pair of nozzles arranged on both sides of the apparatus, in which case the dimensions of the frame are higher than half the door height. The lifting height of the frame is reduced in this case.
Claims (5)
1. Apparatus for cleaning the regions of coke oven doors between a surrounding sealing edge and a refractory door plug, comprising a frame vertically reciprocable along the end of a coke oven door which carries said sealing plug, a first pair of nozzles carried on the upper portion of said frame and arranged to force fluid into the upper portions of those regions of the coke oven door between a surrounding sealing edge and the door plug, and a second pair of nozzles carried on the lower portion of said frame and arranged to force fluid into the lower portions of those regions of the coke oven door between said surrounding sealing edge and the door plug, said nozzles being pivotal about generally vertical axes such that the first pair of nozzles can be pivoted inwardly when they reach the upper edge of the coke oven door upon upward movement of the frame to clean the region between the upper edge of the door plug and the upper horizontally-extending portion of the sealing edge, the second pair of nozzles being pivotal inwardly when they reach the lower edge of the coke oven door upon downward movement of the frame to clean the region between the lower edge of the door plug and the lower horizontally-extending portion of the sealing edge.
2. The apparatus of claim 1 wherein said frame is provided with rollers which ride on track rails mounted on a vertical support column.
3. The apparatus of claim 1 including a thermally-insulated protective shield which surrounds the refractory door plug and is mounted on said frame.
4. The apparatus of claim 1 wherein said frame is caused to reciprocate by means of a hydraulic cylinder.
5. The apparatus of claim 1 including individual control valves for each of said nozzles.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2636283A DE2636283C2 (en) | 1976-08-12 | 1976-08-12 | Device for cleaning the doors of coking ovens |
| DEP2636283.4 | 1976-08-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1098479A true CA1098479A (en) | 1981-03-31 |
Family
ID=5985295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA283,823A Expired CA1098479A (en) | 1976-08-12 | 1977-08-01 | Apparatus for cleaning the doors of coking ovens |
Country Status (7)
| Country | Link |
|---|---|
| JP (1) | JPS5940183B2 (en) |
| BE (1) | BE857665A (en) |
| CA (1) | CA1098479A (en) |
| DE (1) | DE2636283C2 (en) |
| FR (1) | FR2361459A1 (en) |
| GB (1) | GB1531707A (en) |
| IN (1) | IN146160B (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL7609329A (en) * | 1976-08-23 | 1978-02-27 | Hoogovens Ijmuiden Bv | DEVICE FOR CLEANING A COOKING OVEN DOOR. |
| JPS572391A (en) * | 1980-06-06 | 1982-01-07 | Kouritsu Kikai Kogyo Kk | Unit for cleaning outer and inner surfaces of openings to be closed with furnace covers in the coke furnace |
| JPS58184525U (en) * | 1982-05-31 | 1983-12-08 | 株式会社山崎機械製作所 | Hook feeding device |
| JPS59109584A (en) * | 1982-12-14 | 1984-06-25 | Sumitomo Heavy Ind Ltd | Cleaning of coke oven with high pressure water |
| JPS60192788A (en) * | 1984-03-13 | 1985-10-01 | Kansai Coke & Chem Co Ltd | Cleaner for coal feed pocket cover of coke oven |
| DE102005051504A1 (en) * | 2005-09-20 | 2007-03-29 | Schalker Eisenhütte Maschinenfabrik Gmbh | Cleaning device for cleaning oven doors of a coking chamber of a coke oven |
| JP5775858B2 (en) * | 2012-11-07 | 2015-09-09 | 日鉄住金テックスエンジ株式会社 | Coke oven door cleaner |
| DE102013014757A1 (en) | 2013-09-06 | 2015-03-12 | Thyssenkrupp Industrial Solutions Ag | Method and device for successively receiving and cleaning coke oven chamber doors of a coke oven battery or a coke oven bank |
| CN107651726A (en) * | 2017-11-03 | 2018-02-02 | 中国华电科工集团有限公司 | A kind of condensed water precision treatment device spray equipment and its application method |
| CN118344884B (en) * | 2024-06-14 | 2024-08-27 | 山西立恒焦化有限公司 | Coke removing device of coking tower |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA980715A (en) * | 1972-08-11 | 1975-12-30 | Stephen J. Miko | Hydraulic cleaner for doors and the like |
| US3847753A (en) * | 1973-03-02 | 1974-11-12 | Saturn Mach & Welding | Coke oven door and jamb cleaners |
-
1976
- 1976-08-12 DE DE2636283A patent/DE2636283C2/en not_active Expired
-
1977
- 1977-03-11 JP JP52026156A patent/JPS5940183B2/en not_active Expired
- 1977-03-15 IN IN380/CAL/77A patent/IN146160B/en unknown
- 1977-07-25 GB GB31088/77A patent/GB1531707A/en not_active Expired
- 1977-08-01 CA CA283,823A patent/CA1098479A/en not_active Expired
- 1977-08-10 BE BE180065A patent/BE857665A/en not_active IP Right Cessation
- 1977-08-10 FR FR7724635A patent/FR2361459A1/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5322502A (en) | 1978-03-02 |
| FR2361459B1 (en) | 1980-07-11 |
| IN146160B (en) | 1979-03-10 |
| JPS5940183B2 (en) | 1984-09-28 |
| DE2636283A1 (en) | 1978-02-16 |
| BE857665A (en) | 1977-12-01 |
| FR2361459A1 (en) | 1978-03-10 |
| GB1531707A (en) | 1978-11-08 |
| DE2636283C2 (en) | 1984-12-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |