CN201327020Y - Combined multi-nozzle burner - Google Patents
Combined multi-nozzle burner Download PDFInfo
- Publication number
- CN201327020Y CN201327020Y CNU2008201245928U CN200820124592U CN201327020Y CN 201327020 Y CN201327020 Y CN 201327020Y CN U2008201245928 U CNU2008201245928 U CN U2008201245928U CN 200820124592 U CN200820124592 U CN 200820124592U CN 201327020 Y CN201327020 Y CN 201327020Y
- Authority
- CN
- China
- Prior art keywords
- burner
- igniter
- technological
- cooling jacket
- fuel gas
- 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
- 238000001816 cooling Methods 0.000 claims abstract description 55
- 239000007800 oxidant agent Substances 0.000 claims abstract description 39
- 239000002817 coal dust Substances 0.000 claims abstract description 22
- 230000001590 oxidative effect Effects 0.000 claims description 38
- 238000000034 method Methods 0.000 claims description 27
- 230000008569 process Effects 0.000 claims description 27
- 239000002737 fuel gas Substances 0.000 claims description 26
- 239000002826 coolant Substances 0.000 claims description 16
- 238000002309 gasification Methods 0.000 abstract description 9
- 239000000843 powder Substances 0.000 abstract description 7
- 239000003245 coal Substances 0.000 description 20
- 239000003250 coal slurry Substances 0.000 description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 239000007789 gas Substances 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- 238000007789 sealing Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- 230000007812 deficiency Effects 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 239000011261 inert gas Substances 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 239000000956 alloy Substances 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 238000002679 ablation Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000003134 recirculating effect Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Images
Abstract
The utility model provides a combined multi-nozzle burner for combustible powder, which comprises an igniting burner nozzle positioned at the center of the burner, and a plurality of technological burner nozzles evenly arranged around the igniting burner nozzle in the circumferential direction, wherein, each technological burner nozzle comprises a coal dust passage positioned at the center of the technological burner nozzle, and an annular first oxidizer passage arranged on the outer side of the coal dust passage. In the utility model, the technological burner nozzles are combined with the igniting burner nozzle, so that the structure is compact, and both the burning efficiency and the gasification efficiency are improved. Each independent technological burner nozzle can be repaired flexibly and detached conveniently. Through the technological burner nozzles, the load of the burner can be adjusted flexibly. Media in a furnace cavity are mixed evenly through a plurality of strikes so that the flame filling degree is high. Multi-layer even cooling structure can effectively protect the burner so as to prolong the service life of the burner.
Description
Technical field
The utility model relates to a kind of burner, particularly a kind ofly is used for gasification furnace and heating furnace and is the combined type multi-injector burner of fuel with the combustible powder.
Background technology
In the existing Coal Gasification Technology, with the technology comparative maturity of Texaco and Shell, application is comparatively extensive at home, and both have their own characteristics each aspect burner design.
The Texaco gasification furnace burner is fuel with the water-coal-slurry, and this burner is divided into three layers of passage, and the central passage medium is an oxygen, and second layer channel media is a water-coal-slurry, and the outermost layer channel media still is an oxygen.The burner of this structure is very ripe, but the deficiency of self is also arranged: when (1) high speed water coal slurry flows shower nozzle is had very strong wearing and tearing, therefore must often change wearing terrain (the wearing terrain life-span was generally 30～60 days); (2) water-coal-slurry and oxygen adopt straight flow structure to make combustion flame longer, and corresponding body of heater length also increases; (3) burner uses the coil pipe cooling structure, very easily causes damage when dismounting; (4) the burner sparking mode adopts the preheating burner to refractory brick heating in the body of heater, and fire box temperature is switched after reaching the ignition temperature of water-coal-slurry, to water-coal-slurry igniting, sparking mode complex operation; (5) this structural requirement coal can be made into high concentration, high stability, the water-coal-slurry that rheological behavior is good, require coal to wear into the coal slurry that distributes by certain particle size, in order to improve the characteristic of water-coal-slurry, also to add certain quantity of additive, even so, still have the part coal to be not suitable for making water-coal-slurry, the scope of application is limited to.
Shell coal dust gasification equipment is fuel with the dry coal powder, adopts high-pressure inert gas to deliver into gasification furnace, and it is all very low to spray flow velocity from being transported to of fine coal, very little to the burner wearing and tearing.The scope of application to coal is wide, and is insensitive to granularity, cohesiveness, sulfur content, oxygen content and the ash content of coal of coal.The structure of every cover gasification installation is uniformly distributed along the circumference in the stove middle and lower part by 4～6 cover burners, and burner forms flames in opposing direction in stove, and synthesis gas is from the discharging of gasification furnace upper end, and slag discharges from the lower end.Each independent burner is a straight flow structure, and fine coal has the water-cooling jacket protection, and is simple in structure, is convenient to maintenance.The deficiency of Shell burner is: (1) quadruplet burner installation accuracy requires very high; (2) itself is not with igniter, needs to add in addition the igniting device and light a fire in gasification furnace; (3) mixed process of Shell burner coal dust and oxygen mainly realizes that by the structure that liquidates in the stove single burner can't work independently, so the Shell burner scope of application is little, only is applicable to the liquidate body of heater of structure of flame.
For the problems referred to above, current multiple improvement structure proposed.For example Chinese utility application publication number CN 1710333A discloses a kind of burner, and it adopts water-cooling wall to substitute the coil pipe cooling structure of Texaco burner; And adopted the mode of multistage cooling, so that protect burner effectively; Be provided with and be coiled in ignition burner a plurality of coal dust carrier pipes all around, the conveying capacity of adjustable coal saving powder.Yet what this burner adopted is integral design, and dismounting is safeguarded inconvenient.
The utility model content
Therefore, the purpose of this utility model provides a kind of novel burner, to solve problems of the prior art.
Above-mentioned purpose of the present utility model realizes by a kind of modular multijet combustible powder burner is provided.This burner comprises: the igniter burner that is positioned at the burner center; Along the circumferential direction evenly be arranged on a plurality of process burners of ignition burner periphery.Wherein, each process burner comprises: the coal dust passage that is positioned at the process burner center; Be arranged on first oxidant channel of the annular in the coal dust passage outside.By a kind of like this structure, can after ignition operation, promptly stop the use of igniter burner, the coal dust and the oxidant that rely on process burner to provide carry out work.Simultaneously, can regulate the live load of burner by the process burner quantity that increases or reduce work; Load regulation range is big, and means are flexible.
Preferably, be arranged on first cooling jacket in first oxidant channel outside.
Preferably, described igniter burner comprises: the fuel gas passage that is positioned at this igniter burner center; Be arranged on the igniter in the fuel gas passage; Second oxidant channel with the annular that is arranged on the fuel gas passage outside.Wherein, be provided with second cooling jacket between described fuel gas passage and described second oxidant channel, described second oxidant channel is provided with the 3rd cooling jacket outward.
Preferably, described first, second is all double-decker with the 3rd cooling jacket, comprises internal layer and skin, and wherein cooling medium is entered by internal layer and discharges from skin.
By cooling jacket all being set, can prolong burner service life greatly in each passage outside.And, can protect burner more effectively by adopting double-deck cooling duct structure.
Preferably, described igniter burner and described process burner are fixed by mounting flange.When maintenance, the part that needs repairing can be dismantled individually and keeped in repair, and can not exert an influence other parts.
Preferably, the number of described process burner is 2-10.
Preferably, described igniter is movably.Because igniter (fire rod) is movably, therefore behind firing coal-dust, can withdraws from, thereby can avoid ablating.
In addition, burner of the present utility model also has the following advantages:
Coal dust adopts straight tube to carry, and resistance is little, and speed is low, and is little to the wearing and tearing of burner; Mix with the oxidant bump in the outside ejection back, forms independent flammule, can form the uniform flame of a circle after the adjacent flame impingement, thereby guarantee that the fire box temperature field is even, even flow field; The fuel gas passage and second oxidant channel are changed to inert protective gas protection burner finishing igniting task postposition, guarantee not have high temperature gases recirculating to burner channel.
Description of drawings
Fig. 1 is the cutaway view of the agent structure of burner of the present utility model;
Fig. 2 is the more detailed partial schematic diagram of the burner head among Fig. 1;
Fig. 3 is the cross-sectional schematic of the single process burner in the burner of the present utility model.
Reference numerals list:
1. igniter, 2. the cover plate of fuel gas passage, 3. fuel gas enters the mouth, 4. the cooling medium of second cooling jacket outlet, 5. the 3rd cooling jacket, 6. the cover plate of the 3rd cooling jacket, 7. the cooling medium of the 3rd cooling jacket outlet, 8. fine coal enters the mouth, 9. the cover plate of first oxidant channel, 10. first oxidant channel enters the mouth, the cooling medium outlet of 11. first cooling jackets, 12. first cooling jackets, 13. the clamping plate of first cooling jacket, 14. second cooling jacket, the cover plate of 15. second cooling jackets, the clamping plate of 16. second cooling jackets, 17. the cooling medium of second cooling jacket inlet, 18. the cover plate of second oxidant channel, 19. second oxidant channels inlet, the cooling medium inlet of 20. the 3rd cooling jackets, 21. the clamping plate of the 3rd cooling jacket, 22. the cover plate of first cooling jacket, the cooling medium inlet of 23. first cooling jackets, 24. mounting flanges, 25. the fine coal carrier pipe of process burner, 26. the fuel gas passage, the coolant guiding channel of 27. second cooling jackets, 28. second oxidant channels, 29. the coolant guiding channel of the 3rd cooling jacket, 30. first coolant guiding channel, 31. first oxidant channels, the fine coal passage of 32. process burners.
The specific embodiment
Below in conjunction with the accompanying drawing of the present utility model description detailed in addition to the most preferred configuration of burner of the present utility model.
Referring to Fig. 1, burner of the present utility model comprises the igniter burner that is arranged on the middle part and is arranged on a plurality of process burners in the igniter burner outside.Process burner along the circumferential direction is arranged in around the igniter burner equably, and is fixed together by mounting flange 24 and igniter burner, and mounting flange 24 is tightly connected with the body of heater (not shown).Described process burner is preferably 2-10, regulates the live load of burner by the process burner quantity that increases or reduce work.By using 24 pairs of process burners of mounting flange and igniter burner to fix, when maintenance, the part that needs repairing can be dismantled individually and keeped in repair, and can not exert an influence other parts.
Referring to Fig. 3, process burner comprises combustible powder (for example, the coal dust) passage that is positioned at the center, and it is formed by coal dust carrier pipe 25.Coal dust enters the coal dust passage by coal powder entrance 8.Coal dust passage arranged outside has by first oxidant channel 31, and passage 31 is by 9 sealings of the first oxidant channel cover plate, and oxidant enters this passage by first oxidant channel inlet 10.Arranged outside at first oxidant channel has cover plate 22 sealings of first cooling jacket, 12, the first cooling jackets 12 by first cooling jacket.First cooling jacket 12 is a double-decker, for example by the clamping plate 13 of first cooling jacket first coolant guiding channel, 30 (see figure 2)s is divided into inside and outside two-layerly, and cooling medium is by inlet 23 admission passage internal layers, through being flowed out by outlet 11 behind the passage skin.
Refer again to Fig. 1 and Fig. 2, igniter burner comprises the fuel gas passage 26 by 2 sealings of fuel gas passage cover plate that is positioned at the center, and fuel gas enters described fuel gas passage by fuel gas inlet 3.Fuel gas passage arranged outside second cooling jacket 14, it is by 15 sealings of the second cooling jacket cover plate.Second cooling jacket 14 also can be provided with double-decker, its mode and first cooling jacket are similar, promptly by the clamping plate 16 of second cooling jacket second coolant guiding channel 27 is divided into inside and outside two-layerly, cooling medium is entered by inlet 17, is flowed out by outlet 4 through 27 backs, cooling duct.
Second cooling jacket, 14 arranged outside, second oxidant channel, 28 (see figure 2)s, it is by cover plate 18 sealings of second oxidant channel.Oxidant enters this passage by second oxidant channel inlet 19, and from this passage below ejection, after the fuel gas of fuel gas passage 26 ejections mixes, is lighted after igniter 1 is got angry, and forms igniter burner flame.Second oxidant channel, 28 arranged outside the 3rd cooling jacket 5 is by 6 sealings of the 3rd cooling duct cover plate.Equally, the 3rd cooling jacket 5 also can be provided with double-decker according to the mode identical with first and second cooling jackets.
By cooling jacket all being set, can prolong burner service life greatly in each gas passage outside; And all cooling jackets all can adopt double-deck cooling duct structure, in the time of can preventing medium reaction in the stove more effectively liberated heat to the damage of burner, thereby the protection burner.
Igniter 1 is arranged in the fuel gas passage, and igniter is movably (it can be realized by various existing technology), can withdraw from after lighting igniter burner, thereby can avoid being in for a long time damages such as causing ablation under the condition of high temperature.After fire rod was withdrawn from, the fire rod mouth can block with blind flange.
Burner furnace interior branch can adopt high temperature resistant, the anti-specific alloy material that washes away to make, for example HAYNES 188 alloys.
Fine coal in the process burner fine coal pipe is carried as carrier by assist gas, and the fine coal pipe is the straight tube form, and transporting resistance is little.Choose suitable caliber and guarantee that fine coal speed is 5～10m/s, very little to the wearing and tearing of pipe and spout.Spray into the oxygen bump of burner hearth through first oxidant channel and mix one independent flame of formation after being lighted by igniter burner rapidly with the outside behind the fine coal ejection burner.A plurality of process burners form a plurality of independent flammules in stove, adjacent flame is bump mixing mutually after leaving the burner certain distance, form the uniform flame of a circle.Flame is very strong to the radiation of burner, therefore is provided with cooling jacket protection, and the medium in the chuck can be water or other cooling mediums.
Groundwork principle of the present utility model is as follows: the fuel gas and second oxidant channel mix after igniter is lighted; drop into coal dust behind the flame stabilization; coal dust mixes at the burner hearth inner impact with first oxidant; by the igniter burner flame ignition, the fuel gas and second oxidant channel can be replaced into inert gas with the protection burner subsequently.
Groundwork process of the present utility model is as follows: the fuel gas of igniter burner sprays into burner hearth after by fuel gas passage 26, and oxidant sprays into burner hearth by second oxidant channel 28, and two strands of gases mix the back and got angry by igniter 1 in burner hearth and lights.Open the coal dust and the first oxidant feed valve, utilize the flame of igniter burner that coal dust is lighted, close the fuel gas and second oxidant channel then, and be replaced into the inert gas shielding igniter burner.Entire work process has cooling medium to pass through in three layers of cooling jacket all the time, with the protection burner.During the burner power cut-off, stop the coal dust charging earlier, stop oxidant feed at last.
By cell burner of the present utility model, the deficiencies in the prior art have been overcome, good mixing effect, long service life, compact conformation, flame is sturdy, the efficiency of combustion height, self has ignition function, load regulation range is big, and single burner also can be worked, and the scope of application is extensive.
Below combined most preferred embodiment of the present utility model burner of the present utility model has been made detailed description, yet those skilled the in art will appreciate that, under the situation that does not deviate from essence of the present utility model and scope, can carry out various modifications and variations to the utility model.Will be understood that most preferred embodiment of the present utility model is descriptive, but not determinate, scope of the present utility model should be determined according to appended independent claims.
Claims (7)
1, a kind of combined type multi-injector burner, it comprises: the igniter burner that is positioned at the burner center; Along the circumferential direction evenly be arranged on a plurality of process burners of igniter burner periphery,
It is characterized in that each described process burner comprises: the coal dust passage that is positioned at the process burner center; With first oxidant channel that is arranged on the coal dust passage outside.
2, burner according to claim 1 is characterized in that,
Described process burner also comprises first cooling jacket that is arranged on described first oxidant channel outside.
3, burner according to claim 1 and 2 is characterized in that,
Described igniter burner comprises: the fuel gas passage that is positioned at this igniter burner center; Be arranged on the igniter in the fuel gas passage; With second oxidant channel of the annular that is arranged on the fuel gas passage outside,
Wherein, be provided with second cooling jacket between described fuel gas passage and described second oxidant channel, described second oxidant channel is provided with the 3rd cooling jacket outward.
4, according to the described burner of aforementioned arbitrary claim, it is characterized in that,
In described first, second and the 3rd cooling jacket at least one is double-decker, comprises internal layer and skin, and wherein cooling medium is entered by internal layer and discharges from skin.
5, according to the described burner of aforementioned arbitrary claim, it is characterized in that,
Described igniter burner and described process burner are fixed by mounting flange.
6, according to the described burner of aforementioned arbitrary claim, it is characterized in that,
The number of described process burner is 2-10.
7, according to each described burner among the claim 3-6, it is characterized in that,
Described igniter is movably.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201245928U CN201327020Y (en) | 2008-12-29 | 2008-12-29 | Combined multi-nozzle burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201245928U CN201327020Y (en) | 2008-12-29 | 2008-12-29 | Combined multi-nozzle burner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201327020Y true CN201327020Y (en) | 2009-10-14 |
Family
ID=41178992
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201245928U Expired - Lifetime CN201327020Y (en) | 2008-12-29 | 2008-12-29 | Combined multi-nozzle burner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201327020Y (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102559274A (en) * | 2012-01-12 | 2012-07-11 | 山东兖矿国拓科技工程有限公司 | Hot-wall type coal water slurry or pulverized coal gasification furnace fire-resistant lining preheating device and method thereof |
| CN103224815A (en) * | 2012-01-27 | 2013-07-31 | 通用电气公司 | System and method for heating a gasifier |
| CN103805289A (en) * | 2014-03-13 | 2014-05-21 | 杜建吉 | High-efficiency ignition burner of dry pulverized coal fluidized-bed gasifier |
| CN103834444A (en) * | 2014-03-13 | 2014-06-04 | 杜建吉 | Combined ignition nozzle of dry coal powder fluidized bed gasifier |
| TWI588417B (en) * | 2010-09-16 | 2017-06-21 | 掠雪股份有限公司 | Solid fired hot gas generator with extended regulating range |
| US9976741B2 (en) | 2014-02-28 | 2018-05-22 | Air Products And Chemicals, Inc. | Transient heating burner and method |
| TWI634302B (en) * | 2016-08-25 | 2018-09-01 | 日商中外爐工業股份有限公司 | Cooling apparatus of heating furnace |
| CN108728168A (en) * | 2017-04-14 | 2018-11-02 | 航天长征化学工程股份有限公司 | a gasification burner |
| AT524114B1 (en) * | 2020-12-18 | 2022-03-15 | Radmat Ag | Device for processing chemically contaminated solid particles |
-
2008
- 2008-12-29 CN CNU2008201245928U patent/CN201327020Y/en not_active Expired - Lifetime
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI588417B (en) * | 2010-09-16 | 2017-06-21 | 掠雪股份有限公司 | Solid fired hot gas generator with extended regulating range |
| CN102559274A (en) * | 2012-01-12 | 2012-07-11 | 山东兖矿国拓科技工程有限公司 | Hot-wall type coal water slurry or pulverized coal gasification furnace fire-resistant lining preheating device and method thereof |
| CN103224815B (en) * | 2012-01-27 | 2017-05-24 | 通用电气公司 | System and method for heating a gasifier |
| CN103224815A (en) * | 2012-01-27 | 2013-07-31 | 通用电气公司 | System and method for heating a gasifier |
| US9976741B2 (en) | 2014-02-28 | 2018-05-22 | Air Products And Chemicals, Inc. | Transient heating burner and method |
| CN103834444A (en) * | 2014-03-13 | 2014-06-04 | 杜建吉 | Combined ignition nozzle of dry coal powder fluidized bed gasifier |
| CN103834444B (en) * | 2014-03-13 | 2015-07-15 | 济南同智创新能源科技股份有限公司 | Combined ignition nozzle of dry coal powder fluidized bed gasifier |
| CN103805289B (en) * | 2014-03-13 | 2015-04-01 | 济南同智创新能源科技股份有限公司 | High-efficiency ignition burner of dry pulverized coal fluidized-bed gasifier |
| CN103805289A (en) * | 2014-03-13 | 2014-05-21 | 杜建吉 | High-efficiency ignition burner of dry pulverized coal fluidized-bed gasifier |
| TWI634302B (en) * | 2016-08-25 | 2018-09-01 | 日商中外爐工業股份有限公司 | Cooling apparatus of heating furnace |
| CN108728168A (en) * | 2017-04-14 | 2018-11-02 | 航天长征化学工程股份有限公司 | a gasification burner |
| AT524114B1 (en) * | 2020-12-18 | 2022-03-15 | Radmat Ag | Device for processing chemically contaminated solid particles |
| AT524114A4 (en) * | 2020-12-18 | 2022-03-15 | Radmat Ag | Device for processing chemically contaminated solid particles |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: CHANGZHENG ENGINEERING CO., LTD. Free format text: FORMER NAME: BEIJING AEROSPACE WANYUAN COAL CHEMICAL ENGINEERING TECHNOLOGY CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 100176 210 floors, No. 6, Tongji North Road, Beijing economic and Technological Development Zone, room two Patentee after: Aerospace Changzheng Engineering Co.,Ltd. Address before: 100176 210 floors, No. 6, Tongji North Road, Beijing economic and Technological Development Zone, room two Patentee before: Beijing Aerospace Wanyuan Coal Chemical Engineering Technology Co., Ltd. |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20091014 Effective date of abandoning: 20081229 |