CN201077847Y - Improved blast furnace gas pocket type dust removing pneumatic ash transmitting system - Google Patents
Improved blast furnace gas pocket type dust removing pneumatic ash transmitting system Download PDFInfo
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- CN201077847Y CN201077847Y CNU2007201277892U CN200720127789U CN201077847Y CN 201077847 Y CN201077847 Y CN 201077847Y CN U2007201277892 U CNU2007201277892 U CN U2007201277892U CN 200720127789 U CN200720127789 U CN 200720127789U CN 201077847 Y CN201077847 Y CN 201077847Y
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- ash conveying
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- furnace gas
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Abstract
The utility model relates to a blast furnace gas bag type dust-removing ash-conveying system, which comprises a bag type dust remover, an ash conveying pipeline and a air source connected with the ash conveying pipeline, wherein an anti-block ash unloading pipeline device is arranged between the ash hopper of the bag type dust remover and the horizontal ash conveying pipeline of ash conveying system; the ash conveying pipeline in the ash conveying system is provided with at least above one 90 degrees bending pipe, the 90 degrees bending pipes in the ash conveying pipeline are composed of three 30 degrees bending pipes. The utility model solves the jamming problem of blast furnace gas bag type dust removing ash conveying pipeline, the active degree of partial conveyed ash in dead area of ash unloading pipeline is activated effectively by the heated and dried nitrogen through the jet blow activating pipe on the ash unloading pipeline, so that the equipment runs more reliably, additionally, the utility model adopts three segmental 90 degrees bending tubes that can be segmentally updated according to abrasion conditions, so as to reduce the intensity of maintenance operation, lower maintenance cost, so that maintenance of equipment pipeline becomes more convenient and economical.
Description
Technical field
The utility model relates to a kind of Pneumatic ash conveying system, especially a kind of Pneumatic ash conveying system that is applicable in the blast furnace gas bag-type dust removing system.
Background technology
Adopt in the dry-dedusting system of bag-type dusting at blast furnace gas, the useless ash in the ash bucket of fly-ash separator bottom is well known that by the mechanical ash conveying mode, or the Pneumatic ash conveying mode, and the ash that will give up is transported in the fixed feed bin.
Wherein, the mechanical ash conveying mode is to adopt the star distributor, worm conveyor or scraper conveyor, and chapelet, and the ash that will give up is transported to the fixed feed bin.In use, since the long flow path of defeated ash, the temperature height of defeated ash, and link is many, causes the failure rate height of machinery.Because mechanical interface is many, and the cold and hot temperature difference is big, poor sealing performance is failed leaking of ash and is caused the deterioration of Working environment again.
Though known Pneumatic ash conveying system has overcome the above-mentioned defective of mechanical ash conveying, but, because during Pneumatic ash conveying, the defeated ash amount that system plants can't be fixed on the ideal ratio of mixture with the two-phase flow that enters the displacement of pipeline, therefore, when defeated ash amount was low, the efficient of defeated ash was just low, defeated ash amount is high, often produces phenomenon of blocking again.In addition, higher ratio of mixture and higher two-phase flow velocity design make the wearing and tearing aggravation of pipeline.Often make system pipeline the operation once, worn out after two months, production makes troubles to blast furnace.
The design people is in view of the defective that exists in the above-mentioned prior art, by the knowledge of specialty, empirical auxiliary, develops improved blast furnace gas bag-type dusting Pneumatic ash conveying of the present utility model system.
Summary of the invention
The technical problems to be solved in the utility model is: a kind of improved blast furnace gas bag-type dusting Pneumatic ash conveying system is provided, it can overcome the line clogging phenomenon in the blast furnace gas bag-type dusting Pneumatic ash conveying system and the quick wear phenomenon of pipeline, and blast furnace gas bag-type dusting Pneumatic ash conveying system is moved more reliably.
For this reason, a kind of improved blast furnace gas bag-type dusting Pneumatic ash conveying system that the utility model proposes, comprise sack cleaner, ash conveying pipe and be connected the source of the gas of described ash conveying pipe, wherein, between the horizontal ash conveying pipe of the ash bucket of described sack cleaner and strength ash-transmission system, be provided with anti-clogging plug and unload grey conduit means; Have more than one 90 ° of bend pipes in the ash conveying pipe of described ash-transmission system.
Aforesaid improved blast furnace gas bag-type dusting Pneumatic ash conveying system, wherein, grey conduit means is unloaded in described anti-clogging plug, have and connect the grey catheter body of unloading of dust collector ash hopper and horizontal ash conveying pipe respectively, be arranged on and unload grey catheter body external heated attemperator, and enter the described winding-up activation pipe that unloads grey catheter body inside.
Aforesaid improved blast furnace gas bag-type dusting Pneumatic ash conveying system, wherein, described heating and heat-insulating device is electrically heated, or infra-red heat device or coal gas heating tube.
Aforesaid improved blast furnace gas bag-type dusting Pneumatic ash conveying system, wherein, described heating and heat-insulating device has and is arranged on the nichrome wire that unloads grey catheter body outer wall, and the thermal insulation layer that is coated on the nichrome wire outside.
Aforesaid improved blast furnace gas bag-type dusting Pneumatic ash conveying system, wherein, described bottom of unloading grey catheter body is a cone, described winding-up activates pipe and is arranged on the cone place of unloading grey catheter body, and to described nitrogen or other rare gas element that unloads grey catheter body delivered inside heat drying.
Aforesaid improved blast furnace gas bag-type dusting Pneumatic ash conveying system, wherein, described anti-clogging plug is unloaded between grey conduit means and dust collector ash hopper and the horizontal ash conveying pipe and is detachable being connected.
Aforesaid improved blast furnace gas bag-type dusting Pneumatic ash conveying system, wherein, 90 ° of bend pipes the constituting in the described ash conveying pipe by 3 30 ° of bend pipes.
Aforesaid improved blast furnace gas bag-type dusting Pneumatic ash conveying system, wherein, described 30 ° of bend pipes adopt the cast iron whole cast that contains 2% chromium.
Aforesaid improved blast furnace gas bag-type dusting Pneumatic ash conveying system, wherein, the equal diameters of each described 30 ° of bend pipe, and its internal diameter and external diameter are set for the eccentric, and the external diameter medullary ray is with respect to the internal diameter medullary ray bend one lateral deviation heart laterally, and the outside curve portion wall thickness that constitutes 30 ° of bend pipes is greater than inside bend portion wall thickness.
Aforesaid improved blast furnace gas bag-type dusting Pneumatic ash conveying system, wherein, 90 ° of bend pipes in the described ash conveying pipe are constituted by 3 30 ° of bend pipes, and the outlet end of described 90 ° of bend pipes is provided with one section two flange short tube, and two flange short tubes adopt the cast iron whole cast that contains 2% chromium.
Characteristics of the present utility model and advantage are:
1, in the improved blast furnace gas bag-type dusting Pneumatic ash conveying of the present utility model system, between the horizontal ash conveying pipe of sack cleaner ash bucket and strength ash-transmission system, be provided with anti-clogging plug and unload grey conduit means, by unload the grey catheter body outer wall of unloading of grey conduit means in described anti-clogging plug heating and heat-insulating device is installed, prevent the dewfall of defeated grey medium, improved the activity of defeated grey medium.
2, in the improved blast furnace gas bag-type dusting Pneumatic ash conveying of the present utility model system, describedly unload grey supravasal winding-up and activate pipe,, effectively activated the activity of unloading the defeated ash of grey conduit dead band part with the nitrogen of heat drying by being arranged on.
3, in the improved blast furnace gas bag-type dusting Pneumatic ash conveying of the present utility model system, connect described horizontal ash pipeline and above-mentioned anti-clogging plug and unload the conveying Y-tube of grey conduit and have the inner-cavity structure of smooth transition, thereby make being transferred ash (powder) dirt (defeated ash) and entering horizontal ash conveying pipe by Y-tube smoothly of fully having activated.
4, in the improved blast furnace gas bag-type dusting Pneumatic ash conveying of the present utility model system, unload grey conduit means, solved the line clogging problem of blast furnace gas bag-type dusting Pneumatic ash conveying by anti-clogging plug.Simultaneously,, effectively decomposed the positive pressure of dust stratification in the ash bucket, prevented the obstruction of ash bucket ash discharge owing in dust collector ash hopper, be provided with the pressure release awl.
5, in the improved blast furnace gas bag-type dusting Pneumatic ash conveying of the present utility model system, employing is divided into 90 ° of bend pipes of three sections, and at its bow top easy to wear, promptly the lateral arcs bight portion has adopted the design And of monolateral thickening and antifriction cast iron that employing contains chromium 2% to make, and has improved work-ing life.It is 4.3 grams (it is 8.3 grams that the defeated ash of the ton of white cast iron is carried the abrasion loss that produces) that the defeated ash of the ton of 90 ° of bend pipes of described three sections formations is carried the abrasion loss that produces.Exit end at 90 ° of bend pipes, being provided with a length is the two flange short tubes of cast iron that L (being determined by different pipe diameters) contains 2% chromium, the strong wearing and tearing section that defeated grey air-flow extends at 90 ° of winding pipe exit ends has also been contained in its setting, constituted whole ash conveying pipe removable flange bolt syndeton flexibly, make pipeline after wearing and tearing, can upgrade, alleviated remedial operation intensity according to the wear pattern segmentation, reduced maintenance cost, made the maintenance of equipment pipe become convenient and economical.
Description of drawings
Fig. 1 is the structural representation of the improved blast furnace gas bag-type dusting of the utility model Pneumatic ash conveying system;
Fig. 2 is the local enlarged diagram at I place among Fig. 1;
Fig. 3 is 90 ° of bend pipe structure synoptic diagram that are made of three sections 30 ° of bend pipes in the ash conveying pipe of the improved blast furnace gas bag-type dusting of the utility model Pneumatic ash conveying system;
Fig. 4 A, Fig. 4 B, Fig. 4 C are the structure iron of 1/3 90 ° of bend pipes in the ash conveying pipe in the improved blast furnace gas bag-type dusting of the utility model Pneumatic ash conveying system, and wherein, Fig. 4 A is a cross-sectional schematic; Fig. 4 B, Fig. 4 C are respectively left and right sides schematic side view;
Fig. 5 is the structure iron that 90 ° of winding pipe exit ends are strengthened two flange short tubes in the ash conveying pipe of the improved blast furnace gas bag-type dusting of the utility model Pneumatic ash conveying system.
Embodiment
Understand for the purpose of this utility model, feature, technique effect being had more clearly, now contrast accompanying drawing improved blast furnace gas bag-type dusting Pneumatic ash conveying of the present utility model system is described.The direction of arrow A shown in the figure is defeated grey direction.
As shown in Figure 1, 2, improved blast furnace gas bag-type dusting Pneumatic ash conveying of the present utility model system, comprise sack cleaner, ash conveying pipe and be connected the source of the gas of described ash conveying pipe, grey conduit means 1 is unloaded in the anti-clogging plug between the horizontal ash conveying pipe 12 of sack cleaner ash bucket 7 and strength ash-transmission system.Anti-clogging plug is unloaded grey conduit means 1 and is comprised and connect the grey catheter body 8 of unloading of dust collector ash hopper 7 and horizontal ash conveying pipe 12 respectively, be arranged on and unload grey catheter body 8 external heated attemperators 2, and be arranged on and unload on the grey catheter body 8, and the winding-up that enters its body interior activates pipe 9.Described winding-up activate pipe 9 can be from the outside of unloading grey catheter body 8 to unloading ash (powder) dirt that is transferred in the grey catheter body 8 activation of jetting.
Described bottom of unloading grey catheter body 8 is a cone, and preferred described winding-up activates pipe 9 and is arranged on the cone place of unloading grey catheter body 8.
The ash that is transferred (powder) dirt is from the pneumatic clock valve 4 of ash bucket 6 processes of blast furnace gas sack cleaner 7, pneumatic discharge valve 3 enters from the top of unloading grey catheter body 8 with the state of freely falling body and unloads in the grey catheter body 8, the ash that is transferred (powder) dirt is again from unloading in the grey catheter body 8 through pneumatic discharge valve 10, enter the defeated ash section of the level of carrying Y-tube 11 by the segmental arc of carrying Y-tube 11, at last, the defeated ash section of the level of the ash that is transferred (powder) dirt through carrying Y-tube 11 enters horizontal ash conveying pipe 12.Defeated ash at first is heated attemperator 2 physics and activates in this course of conveying; Activate pipe 9 by winding-up then and carry out the secondary physical activation.Thereby increased the activity of ash (powder) dirt in ash conveying pipe that is transferred effectively, prevented that ash conveying pipe is blocked.
Described heating and heat-insulating device 2 can be electrically heated, can also adopt the heating of Infrared Heating and coal gas.As shown in Figure 1, 2, be a specific embodiment of the present utility model, for adopting electrically heated structure, promptly heating and heat-insulating device 2 has and is arranged on the nichrome wire that unloads grey catheter body 8 outer walls, and the thermal insulation layer that is coated on the nichrome wire outside shown in the figure.
Activate pipe 9 by described winding-up, can be from the outside of unloading grey conduit 8 to the activation of jetting of defeated ash in the conduit, the activated gas of jetting can adopt nitrogen or other rare gas element of heat drying.
In operation, also to activate pipe, by manually outside conduit, defeated ash in the conduit being stirred activation with crooked chisel by described winding-up.
For the ease of the replacing of installing, described unloading being connected that employing can be installed and removed flexibly between grey catheter body 8 and top sack cleaner ash bucket 6 and the following ash conveying pipe.
In the ash conveying pipe of improved blast furnace gas bag-type dusting Pneumatic ash conveying of the present utility model system, have more than one 90 ° of bend pipes 15, shown in Fig. 3,4A, 4B, 4C, 5, described 90 ° of bend pipes adopt three 30 ° of bend pipes to constitute, shown in Fig. 4 A, the structure of having represented 30 ° of bend pipes, the i.e. partial view of the front view of 30 ° of bend pipes and two flanges.
90 ° of bend pipes 15 in the described ash conveying pipe are constituted by 3 30 ° of bend pipes 13, and the two ends of each 30 ° of bend pipe 13 have joint flange 16,17.Described 30 ° of bend pipes 13 adopt the cast iron whole cast that contains 2% chromium.The equal diameters of each described 30 ° of bend pipe 13, and its internal diameter and external diameter are set for the eccentric, eccentric direction is the positive dirction towards 90 ° of bend pipe 15 one side easy to wear, be external diameter medullary ray 01-01 with respect to the internal diameter medullary ray 02-02 bend one lateral deviation heart laterally, have the offset Δ, the outside curve portion wall thickness H that constitutes 30 ° of bend pipes is greater than the wall thickness h of inside bend portion.The size of described offset Δ is determined according to the bend pipe diameter.
90 ° of bend pipes 15 in the described ash conveying pipe are constituted by 3 30 ° of bend pipes 13, and the outlet end of described 90 ° of bend pipes 15 is provided with one section two flange short tube 14, and two flange short tubes adopt the cast iron whole cast that contains 2% chromium.
90 ° of bend pipes 15 in the described ash conveying pipe serve as a contrast gasket end to end by three 30 ° of bend pipes and join with bolt, have formed 90 ° of bend pipes in the improved ash conveying pipe.In the present embodiment, can be as the diameter of 30 ° of bend pipes: internal diameter Ф 93, and external diameter Ф 120, the center of circle of its external diameter is 1.5mm to the eccentric Δ in the orientation, the center of circle of the relative internal diameter of direction easy to wear of bend pipe, making wall thickness one side wall thickness H easy to wear of 30 ° of bend pipes is 15mm; The other side wall thickness h is 12mm.The wall thickness of described 90 ° of bend pipes one side easy to wear is the bow top that concentrates on 90 ° of bend pipes 15, but bow top at whole 90 ° of bend pipes, the distribution of its abrasion loss is also inhomogeneous, and therefore, the combination that 90 ° of bend pipes is modified into 3 30 ° of bend pipes helps changing the cost that the bad back of bend pipe wearing and tearing is changed.30 ° of bend pipes adopt the cast iron whole cast that contains 2% chromium, are fit to typing and produce in batches.
See also Fig. 5, Fig. 5 is the structure iron that 90 ° of winding pipe exit ends are strengthened two flange short tubes in the ash conveying pipe in the improved blast furnace gas bag-type dusting of the utility model Pneumatic ash conveying system.The front view of 90 ° of two flange short tubes of winding pipe exit ends reinforcement and the partial view of two flanges have been represented.90 ° of bend pipe wall thickness one side easy to wear concentrates on the bow top of 90 ° of bend pipes in the ash conveying pipe, but tend to extend to the straight-tube portion of 90 ° of winding pipe exit ends, therefore, in improved ash conveying pipe, the exit end of 90 ° of bend pipes all is provided with one section two flange short tube that contain the cast iron whole cast of 2% chromium.
In the present embodiment, adopted anti-clogging plug to unload grey conduit means in the improved blast furnace gas bag-type dusting Pneumatic ash conveying system.Unload grey conduit means between the horizontal ash conveying pipe of sack cleaner ash bucket and strength ash-transmission system.Its outer wall has been installed heating and heat-insulating device; Its cone becomes through the section top, winding-up is housed activates pipe; The conveying Y-tube of mellow and full transition is equipped with in its below; In the horizontal ash conveying pipe front of carrying Y-tube, the speedup preventing clogging up device is housed also; In improved blast furnace gas bag-type dusting Pneumatic ash conveying system,, also in the fiber bag precipitator ash bucket, be provided with pressure release awl 5 in order to improve the ash discharge performance of useless ash in the sack cleaner ash bucket.Tubing system at improved blast furnace gas bag-type dusting Pneumatic ash conveying has adopted wear-resisting and readily removable tubing system design; All 90 ° of bend pipes adopt R/D＞8, two flange " monolateral thickening " bend pipes of cast iron that contained 2% chromium by 30 ° at three joints are formed by connecting by bolt with the abrasive rubber gasket, exit end at 90 ° of bend pipes, having a length is the two flange short tubes of cast iron that L (being determined by different pipe diameters) contains 2% chromium, by the 90 ° bend pipes of abrasive rubber gasket, be connected with the ash conveying pipe of front by bolt and back.The straight-tube portion of ash conveying pipe adopts the weldless steel tube of the two flanges of band to be formed by connecting by bolt by the abrasive rubber gasket.
The above only is a specific embodiment of the utility model, can not limit the scope that the utility model is implemented with this; The embodiment that other are feasible, i.e. any variation and the modification of being done according to the utility model claims generally all belongs to the scope of the utility model patent protection.
Claims (10)
1. improved blast furnace gas bag-type dusting Pneumatic ash conveying system, comprise sack cleaner, ash conveying pipe and be connected the source of the gas of described ash conveying pipe, it is characterized in that: between the horizontal ash conveying pipe of the ash bucket of described sack cleaner and strength ash-transmission system, be provided with anti-clogging plug and unload grey conduit means; Have more than one 90 ° of bend pipes in the ash conveying pipe of described ash-transmission system.
2. improved blast furnace gas bag-type dusting Pneumatic ash conveying as claimed in claim 1 system, it is characterized in that: grey conduit means is unloaded in described anti-clogging plug, have and connect the grey catheter body of unloading of dust collector ash hopper and horizontal ash conveying pipe respectively, be arranged on and unload grey catheter body external heated attemperator, and enter the described winding-up activation pipe that unloads grey catheter body inside.
3. improved blast furnace gas bag-type dusting Pneumatic ash conveying as claimed in claim 2 system, it is characterized in that: described heating and heat-insulating device is electrically heated, or infra-red heat device or coal gas heating tube.
4. improved blast furnace gas bag-type dusting Pneumatic ash conveying as claimed in claim 2 system is characterized in that: described heating and heat-insulating device has and is arranged on the nichrome wire that unloads grey catheter body outer wall, and the thermal insulation layer that is coated on the nichrome wire outside.
5. improved blast furnace gas bag-type dusting Pneumatic ash conveying as claimed in claim 2 system, it is characterized in that: described bottom of unloading grey catheter body is a cone, described winding-up activates pipe and is arranged on the cone place of unloading grey catheter body, and to described nitrogen or other rare gas element that unloads grey catheter body delivered inside heat drying.
6. improved blast furnace gas bag-type dusting Pneumatic ash conveying as claimed in claim 1 system is characterized in that: described anti-clogging plug is unloaded between grey conduit means and dust collector ash hopper and the horizontal ash conveying pipe and is detachable being connected.
7. improved blast furnace gas bag-type dusting Pneumatic ash conveying as claimed in claim 1 system is characterized in that: 90 ° of bend pipes the constituting by 3 30 ° of bend pipes in the described ash conveying pipe.
8. improved blast furnace gas bag-type dusting Pneumatic ash conveying as claimed in claim 7 system, it is characterized in that: described 30 ° of bend pipes adopt the cast iron whole cast that contains 2% chromium.
9. improved blast furnace gas bag-type dusting Pneumatic ash conveying as claimed in claim 7 system, it is characterized in that: the equal diameters of each described 30 ° of bend pipe, and its internal diameter and external diameter are set for the eccentric, and the external diameter medullary ray is with respect to the internal diameter medullary ray bend one lateral deviation heart laterally, and the outside curve portion wall thickness that constitutes 30 ° of bend pipes is greater than inside bend portion wall thickness.
10. improved blast furnace gas bag-type dusting Pneumatic ash conveying as claimed in claim 1 system, it is characterized in that: 90 ° of bend pipes the constituting in the described ash conveying pipe by 3 30 ° of bend pipes, and the outlet end of described 90 ° of bend pipes is provided with one section two flange short tube, and two flange short tubes adopt the cast iron whole cast that contains 2% chromium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201277892U CN201077847Y (en) | 2007-08-10 | 2007-08-10 | Improved blast furnace gas pocket type dust removing pneumatic ash transmitting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201277892U CN201077847Y (en) | 2007-08-10 | 2007-08-10 | Improved blast furnace gas pocket type dust removing pneumatic ash transmitting system |
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| Publication Number | Publication Date |
|---|---|
| CN201077847Y true CN201077847Y (en) | 2008-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201277892U Expired - Lifetime CN201077847Y (en) | 2007-08-10 | 2007-08-10 | Improved blast furnace gas pocket type dust removing pneumatic ash transmitting system |
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| CN (1) | CN201077847Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109022656A (en) * | 2018-10-09 | 2018-12-18 | 马鞍山钢铁股份有限公司 | A kind of blast furnace gas dry dusting ash-transmission system |
| CN109161626A (en) * | 2018-11-13 | 2019-01-08 | 四川德胜集团钒钛有限公司 | A kind of dedusting of blast furnace gas ash-discharging device |
-
2007
- 2007-08-10 CN CNU2007201277892U patent/CN201077847Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109022656A (en) * | 2018-10-09 | 2018-12-18 | 马鞍山钢铁股份有限公司 | A kind of blast furnace gas dry dusting ash-transmission system |
| CN109161626A (en) * | 2018-11-13 | 2019-01-08 | 四川德胜集团钒钛有限公司 | A kind of dedusting of blast furnace gas ash-discharging device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20081212 Address after: Wujiang City, Jiangsu province Lingzhen split eight community, zip code: 215222 Patentee after: Kelin Environmental Protection Equipment, Inc. Address before: Wujiang City, Jiangsu province Lingzhen split eight community, zip code: 215222 Patentee before: Jiangsu Kelin Group Co., Ltd. |
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| ASS | Succession or assignment of patent right |
Owner name: KELIN ENVIRONMENT PROTECTION EQUIPMENTS CO., LTD. Free format text: FORMER OWNER: JIANGSU KELIN GROUP CO., LTD. Effective date: 20081212 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160825 Address after: Split eight communities in Wujiang District of Suzhou City, Jiangsu province 215000 Patentee after: Environmental Protection Technology Co., Ltd. Address before: 215222 Wujiang City, Jiangsu Province eight song split community Patentee before: Kelin Environmental Protection Equipment, Inc. |
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| CX01 | Expiry of patent term |
Granted publication date: 20080625 |
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| CX01 | Expiry of patent term |