CN201935617U - Roller-type high-temperature-powder cooling device - Google Patents
Roller-type high-temperature-powder cooling device Download PDFInfo
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- CN201935617U CN201935617U CN2011200054075U CN201120005407U CN201935617U CN 201935617 U CN201935617 U CN 201935617U CN 2011200054075 U CN2011200054075 U CN 2011200054075U CN 201120005407 U CN201120005407 U CN 201120005407U CN 201935617 U CN201935617 U CN 201935617U
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Abstract
The utility model discloses a roller-type high-temperature-powder cooling device, which can be applied to power generation (the cooling of high-temperature cinders of a circulating fluidized bed), an industrial kiln (the cooling of high-temperature kiln materials), a chemical process (the cooling of solid reaction medium) and a cooling process for other high-temperature powders. The roller-type high-temperature-powder cooling device comprises an inner roller 1, an outer roller 2, dust-blowing sheets 3 on the wall of the outer roller, and grooves 4 on the walls of the inner roller and the outer roller; the inner roller and the outer roller consist of film-type water-cooling walls (ribs 5 and water-cooling pipes 6); the cooling device is mainly divided into a radiating heat-exchanging section, a convecting section and a heat-conducting section; radiating heat-exchanging ribs are arranged on the water-cooling wall of the outer roller at the radiating section to enhance the heat exchange; the inner roller at the convecting section and the heat-conducting section is structured as a groove-shaped film-type wall in order to form effective convecting heat transfer; the dust-blowing sheets 3 with a heat-transferring function are arranged on the water-cooling wall of the outer roller; dust-receiving sheets 7 are arranged at the edges of the grooves to receive particles blown off by the dust-blowing sheets of the outer roller; and the bending direction of the dust-receiving sheet is the same as the rotating direction of the roller. The roller-type high-temperature-powder cooling device realizes the particle cooling process on the basis of the heat-transferring principle between the particles and the roller wall, the cooling capacity of the device can be effectively improved; and the length of the roller can be shortened, so that the maintenance passage and the fire-fighting passage of the factory are vacated and thus the normal running the production is ensured.
Description
Technical field
The utility model provides a kind of industrial process high-temperature powder cooling device, can be used for the cooling procedure of dynamic power (as the high-temperature ash cooling of CFBB), industrial furnace (as the cooling of high temperature kiln material), chemical process (as the cooling of reaction solid dielectric) and other high-temperature powders.
Background technology
High-temperature powder in the commercial plant carries a large amount of physics sensible heats, will cause huge energy dissipation as not recycling.With the thermal power plant CFBB is example, if the slag discharge capacity is 100t/h at the bottom of the 300MW CFBB, these lime-ash are cooled to temperature a little more than environment by tapping temperature, boiler efficiency can improve 1%～2%, and the conservation of fuel of separate unit stove will reach (2～2.5) ten thousand tons/(5000～6000) hour.Powder cooling procedure in industry powder (building materials, lime, the powder mineral aggregate) production process can directly have influence on the output and the quality of product, organizes the recovery of this class powder used heat and can receive considerable economic benefit.
Conventional at present powder cooling device all adopts surface-type heat exchange principle to move.
High-temperature ash cooling device with the power plant CFBB is an example.Eliminate two kinds of only remaining at present fluidized bed slag cooler and roller slag coolers through technology competition and market.The former utilizes the fluid bed principle, and the physics sensible heat that the pipe laying heating surface absorbs high-temperature ash is set in fluid bed, the latter be utilize the cylinder rotation make high-temperature ash periodically the water-cooling wall of contact roller tube inner surface emit the physics sensible heat.
The fluidized bed slag cooler that large circulating fluidized bed boiler uses is very responsive to particle size, will cause the slag cooler bed that collapses in case particle size surpasses design size, and then cause boiler shutdown, and economic loss is huge.Therefore, roller slag cooler has obtained development rapidly, and its great advantage is to the particle size paralysis, as long as the particle that boiler can move can cool off in cylinder.The roller slag cooler shortcoming is that heat transfer coefficient is low, and cooling capacity is little, for satisfying the cooling requirement of boiler slag removal, must adopt the method that increases heat transfer area, owing to be subjected to a series of technical limitations, conventional at present way is to strengthen roller slag cooler length.This not only hinders normal operation of boiler and maintenance, also can take the part passageway for fire apparatus, and potential safety hazard is huge, and the material consumption also can increase thereupon simultaneously.
Existing roller slag cooler has multiple pattern, as louvered, multitube, spiral etc.The Chinese patent net shows that the patent about the fluidized-bed combustion boiler roller slag cooler has 30 approximately at present, and these slag coolers are to rely on the heat conduction between high-temperature ash and barrel to carry out in the overwhelming majority on the heat exchange mode.The part slag cooler has structurally been made improvement, as people's such as Xu Jie patent " rolling-cylinder type slag-cooler " (patent No. CN 201181175Y), changes the lifting blade structure of outer tube inner wall, makes the heat-transfer surface that does not contact with lime-ash be reduced to about 1/3rd; The patent " lifting blade drum slag cooling device " (patent No. CN 201181176Y) of appointing people such as allowing has changed the structure of lifting blade, and it is made straight plate or bottom bending type, has strengthened the degree of stirring of granule materials; People's such as Cao Xucheng patent " efficient chilling roll formula slag cooler " (patent No. CN 200979169Y) leading the water pipe that is provided with on the slag blade more than, has improved cooling effect.On the basis of telescopic and water-cooled barrel, these patents mainly are to improve the lifting blade structure, make high-temperature ash along with shed higher position in the rotation arrival cylinder of cylinder downwards, and some is also managed, and space increase heat-transfer surface comes enhanced heat exchange in tube.The subject matter that these patents solve comprises two aspect contents: the first, and solve lime-ash and followed the drum movement problem to greatest extent, promptly effectively prolonged the time that lime-ash effectively conducts heat; The second, solved roller slag cooler bearing capacity problem.The former mainly is reflected in various dust plates, and the latter is reflected in the water wall structure on the chuck water-cooling structure basis.
Though structurally made various improvement, main still lime-ash particle swarm that the lime-ash cooling is relied on and the heat conduction between barrel.Heat conduction is a kind of diabatic process that depends critically upon the material rerum natura in three kinds of diabatic processes.Compare with convection current with radiation, think that the limit of its influence heat transfer is extremely limited.Convection heat transfer' heat-transfer by convection can improve heat-transfer effect by changing fluid velocity.Roller slag cooler when work, the duty that exists the part barrel not covered always by grey solid impurity particle because ash temperature constantly descends, rely on ability that radiant force reduces particle temperature more and more a little less than, be in very weak heat transfer state this moment.Particularly be lower than after 500 ℃ when particle temperature, radianting capacity sharply descends, and depends merely on heat-conducting mode and reclaims heat and must need very large heat transfer area.
The introduction to aspects such as properties of product and corresponding techniques researchs in relevant academic conference of domestic slag cooler main manufacturer is consistent with existing patent content, and the relevant report in the domestic periodical does not exceed the technical scope of above-mentioned patent yet.Because the birthplace of roller slag cooler is a China, can think does not have relevant technology contents in other language documents.
The drum-type high-temperature powder cooling device that the utility model provides is from the cooling procedure of the heat-transfer mechanism tissue particles between particle and wall, cylinder is divided into radiation heat transfer section, convection section and heat conduction section, strengthen the heat exchange of different phase particle and cooling medium according to heat-transfer mechanism, can effectively increase cooling capacity, dwindle drum length, save manufactured materials.Abdicate maintenance and passageway for fire apparatus for factory building simultaneously, eliminate safe hidden trouble, ensure and produce normal operation.
The utility model content
The purpose of this utility model is the technical disadvantages that overcomes existing roller slag cooler, and a kind of drum-type high-temperature powder cooling device of better effects if is provided.
The diabatic process of high-temperature particle inside can be divided into four parts: 1. the high-temperature particle temperature is very high, has stronger radianting capacity, mainly carries out radiation heat transfer with the external world; 2. particle temperature is higher, but not appreciable impact of radiation heat transfer particle and extraneous heat exchange; 3. particle still has big heat, has big gradient between its surface and the internal temperature, and this moment, the particle and the external world were mainly based on heat convection; 4. particle temperature reduces gradually, and its surface reduces gradually with the internal temperature gradient, and carry out heat conduction by granule interior to its surface based on granule interior heat conduction this moment.
Technical scheme is as follows:
A kind of drum-type high-temperature powder cooling device comprises dust sheet on inner core, urceolus, the outer tube wall and the groove on the inside and outside barrel.Inner core and urceolus constitute by fin panel casing, can be cylindrical shape or the cylindrical shape that has groove.Outer tube inner wall is arranged the dust sheet, and its function is the high-temperature particle in the access to plant to be distributed enter between the inner/outer tube and inner core; Grey sheet is held in the setting of inner core recess edge, and its major function is that the particle that urceolus is shed is introduced the inner core groove, realizes the heat convection between high-temperature particle and the water-cooling wall.Urceolus inboard and inner core both sides are provided with the heat transfer fin, and its function is the heat transfer between reinforcing particle and the water-cooled surface.Inner core adopts water pipe to be connected with the contact between the urceolus, guarantees the cylinder whole rigidity.
Described drum-type high-temperature powder cooling device is made up of swing roller, feeding mechanism, discharging mechanism, supporting mechanism, motor and transmission mechanism.Swing roller 2 provides power by transmission mechanism 4 (hinge wheel or annular rack) by drive motors 5.Slag cooler is supported by supporting mechanism, comprises bracing ring 3, support wheel 7 (adjustable height) and gear wheel 6.Cooling water 9 enters from entering the mouth, compile from exporting 10 after absorbing heat through cylinder, and rely on swivel joint 11 the cooling water inlet manage, outlet and swing roller couple together.
The drum-type high-temperature powder cooling device that the utility model provides mainly is divided into radiation heat transfer section (feeding mechanism and dotted line forward part among Fig. 1), convection section and heat conduction section.With embodiment 1 (Fig. 2, Fig. 3) is example, the spoke hot arc is based on the radiation heat transfer between particle and wall, and this section inner core is the squirrel-cage light-pipe structure, and urceolus is a film water cold wall structure, its disposed inboard has radiation heat transfer fin 13, can increase radiation heat transfer amount between particle and the wall.The dust sheet 17 of convection section by having certain inclination angle advances particles to advance to slag-drip opening, and dust sheet 17, groove 18 and hold grey sheet 19 and facilitate heat convection between particle and the water-cooled surface together can effectively improve cooling capacity.Heat conduction section particle temperature is lower, mainly realizes the dynamic equilibrium that progressively reduces by granule interior heat conduction and the outside heat transfer by outer surface.
High-temperature particle enters slag cooler from feeding mechanism 1, behind radiation heat transfer Duan Shiyu water-cooling wall diaphragm 16 and radiation heat transfer fin 13 radiation heat transfers, under the drive of swing roller 2, enter between inner/outer tube and cylinder inside, then by dust sheet 17 and hold grey sheet 19 with the particle water conservancy diversion to groove 18, with convection section water-cooling wall diaphragm 16 heat-shifts.After arriving particle outlet, rely on gravity to fall into discharging mechanism 8.High-temperature particle constantly washes away effective convection current that the groove surfaces externally and internally forms particle and water-cooled surface in cylinder, can strengthen overall heat exchange effect.Hold grey sheet 19 and accept urceolus and shed the particle that gets off, and it is imported inner core groove carry out heat exchange.
Compared with prior art, the utility model has the advantages that:
1, organizes diabatic process from high-temperature particle and wall heat-transfer mechanism, cylinder is divided into radiation heat transfer section, convection section and heat conduction section.Compare with existing roller slag cooler, emphasis has been strengthened the heat convection between radiant heat transfer and particle and wall, can effectively increase cooling capacity;
2, under the equal volume prerequisite, can significantly increase effective heat transfer area, improve the heat absorption capacity of device;
3,, utilize the radiation heat transfer fin to increase radiation heat transfer amount between particle and the wall in the radiation heat transfer section;
4, at convection section, make particle constantly wash away water-cooling wall and heat convection fin by holding grey sheet, dust sheet and groove, strengthen heat convection;
5,, can dwindle drum length, economical with materials under the constant prerequisite of diameter of cylinder owing to strengthened heat-transfer effect.Can be factory building simultaneously and abdicate maintenance and passageway for fire apparatus, eliminate safe hidden trouble, ensure and produce normal operation.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the A-A sectional drawing (radiant section section) of Fig. 1 middle cylinder body;
Fig. 3 is the B-B sectional drawing (convection section section) of Fig. 1 middle cylinder body;
Fig. 4,5,6,7, the 8th, the sectional drawing of five kinds of forms of cylindrical shell A-A;
Fig. 9,10,11,12, the 13rd, the sectional drawing of five kinds of forms of B-B of cylindrical shell; Figure 14 is the inner core sectional drawing of cylindrical shell B-B.
Among the figure: 1. feeding mechanism, 2. swing roller, 3. bracing ring, 4. transmission mechanism, 5. drive motors, 6. gear wheel, 7. support wheel, 8. discharging mechanism, 9. cooling water inlet, 10. coolant outlet, 11. swivel joint, 12. cooling water pipes, 13. radiation heat transfer fins, 14. urceolus, 15. inner cores, 16. water-cooling wall diaphragms, 17. the dust sheet, 18. grooves, 19. hold grey sheet.
The specific embodiment
Below in conjunction with embodiment the utility model is described.
Embodiment 1: design parameter: 850 ℃ of ash temperature are cooled to 150 ℃
As Fig. 2, shown in Figure 3.
Drum-type high-temperature powder cooling device tube length 4.5m, water-cooled urceolus diameter 1.2m, inner core effective diameter 0.8m; Radiation heat transfer segment length 1.5m, along 45 water cooling tubes of urceolus circumference, diameter 50mm, two tube hub wire clamp angles are 8 °, and form membrane wall with the welding of 5mm steel plate between two pipes, strengthen radiation heat exchange between particle and wall, the vertical tube wall of direction at the thick square steel plate of welding 5mm fin on the water cooling tube of this membrane wall simultaneously; In the heat convection section, arrange 48 water cooling tubes altogether along the inner core circumference, evenly arrange nine on each groove walls, welding 5mm steel plate is as the heat convection fin between same per two water cooling tubes, inner core is provided with 6 grooves altogether, the dark 0.3m of groove, the effective angle of its two side wall is 35 °, the recess edge setting is held grey sheet and is accepted the particle that urceolus dust sheet is shed, the thick bottom of welding 5mm bends steel plate as the dust sheet on the urceolus membrane wall water cooling tube of this section simultaneously, bending angle is 24 °, bends towards identical with the cylinder direction of rotation.
As shown in Figure 9, the difference of present embodiment and embodiment 1 is that described heat convection section inner/outer tube is groove structure, and does not arrange on the inner core water cooling tube and hold grey sheet.The dark 70mm of urceolus groove, the effective angle of its two side wall is 25 °, arranges 54 water cooling tubes altogether along the urceolus circumference, wherein arranges 6 in each groove.
Embodiment 3
As shown in figure 10, the difference of present embodiment and embodiment 1 is that described heat convection section inner core is a film water cold wall structure, and urceolus is embodiment 2 described groove structures.Arrange 30 water cooling tubes altogether along the inner core circumference, form membrane wall with the welding of 5mm steel plate between two pipes.
Embodiment 4
As shown in figure 11, the difference of present embodiment and embodiment 1 is that described heat convection section inner/outer tube is groove structure, but groove number as different from Example 2.Inner/outer tube is all arranged four grooves in this example, inner core groove depth 150mm, and the effective angle of its two side wall is 45 °, urceolus groove depth 70mm, the effective angle of its two side wall also is 45 °; The urceolus circumference is arranged 48 water cooling tubes altogether, arranges 8 in each groove, and the inner core circumference is arranged 44 water cooling tubes altogether, also arranges 8 in each groove.
Embodiment 5
As shown in figure 12, the difference of present embodiment and embodiment 1 is that described heat convection section inner core is a film water cold wall structure, and urceolus is the groove structure identical with embodiment 4.The inner core circumference is arranged 30 water cooling tubes altogether, forms membrane wall with the welding of 5mm steel plate between two pipes.
Embodiment 6
As shown in figure 13, the difference of present embodiment and embodiment 1 is described heat convection section inner core groove quantity.In the present embodiment, inner core is provided with four grooves, groove depth 150mm, and the effective angle of its two side wall is 45 °, the inner core circumference is arranged 44 water cooling tubes altogether, arranges 8 in each groove.
As shown in Figure 4, the difference of present embodiment and embodiment 1 is to arrange the radiation heat transfer fin on the described radiation heat transfer section inner core fin panel casing that bending angle is 24 °, bends towards identical with direction of rotation.
Embodiment 8
As shown in Figure 5, the difference of present embodiment and embodiment 1 is that described radiation heat transfer section urceolus is a film water cold wall structure, and the radiation heat transfer fin identical with embodiment 7 is set on the inner core water-cooling wall.
As shown in Figure 6, the difference of present embodiment and embodiment 1 is that described radiation heat transfer section inner/outer tube is film water cold wall structure.Arrange 45 water cooling tubes on the urceolus, arrange 30 on the inner core, form membrane wall with the welding of 5mm steel plate between per two pipes.
As shown in Figure 7, present embodiment and the difference of embodiment 1 be described radiation heat transfer section inner core for embodiment 1 in the identical groove structure of heat convection section inner core, just take not segmentation of inner core, the urceolus segmented structure.
Embodiment 11
As shown in Figure 8, present embodiment is that with the difference of embodiment 1 described radiation heat transfer section inner core is and the identical film water cold wall structure of embodiment 9 structures.
Shown in Fig. 4,9, present embodiment and the difference of embodiment 1 are that inner core in the described radiation heat transfer section is the film water cold wall structure identical with embodiment 7, and described heat convection section inner/outer tube adopts the groove structure identical with embodiment 2.
Shown in Fig. 4,10, present embodiment and the difference of embodiment 1 are that inner core in the described radiation heat transfer section is the film water cold wall structure identical with embodiment 7, and described heat convection section adopts the inner/outer tube structure identical with embodiment 3.
Shown in Fig. 4,11, present embodiment and the difference of embodiment 1 are that inner core in the described radiation heat transfer section is the film water cold wall structure identical with embodiment 7, and described heat convection section adopts the inner/outer tube structure identical with embodiment 4.
Shown in Fig. 4,12, present embodiment and the difference of embodiment 1 are that inner core in the described radiation heat transfer section is the film water cold wall structure identical with embodiment 7, and described heat convection section adopts the inner/outer tube structure identical with embodiment 5.
Shown in Fig. 4,13, present embodiment and the difference of embodiment 1 are that inner core in the described radiation heat transfer section is the film water cold wall structure identical with embodiment 7, and described heat convection section adopts the inner/outer tube structure identical with embodiment 6.
Shown in Fig. 5,9, present embodiment and the difference of embodiment 1 are that described radiation heat transfer section adopts the structure identical with embodiment 8, the inner/outer tube structure that described heat convection Duan Weiyu embodiment 2 is identical.
Shown in Fig. 5,10, present embodiment and the difference of embodiment 1 are that described radiation heat transfer section adopts the structure identical with embodiment 8, the inner/outer tube structure that described heat convection Duan Weiyu embodiment 3 is identical.
Shown in Fig. 5,11, present embodiment and the difference of embodiment 1 are that described radiation heat transfer section adopts the structure identical with embodiment 8, the inner/outer tube structure that described heat convection Duan Weiyu embodiment 4 is identical.
Embodiment 20
Shown in Fig. 5,12, present embodiment and the difference of embodiment 1 are that described radiation heat transfer section adopts the structure identical with embodiment 8, the inner/outer tube structure that described heat convection Duan Weiyu embodiment 5 is identical.
Embodiment 21
Shown in Fig. 5,13, present embodiment and the difference of embodiment 1 are that described radiation heat transfer section adopts the structure identical with embodiment 8, the inner/outer tube structure that described heat convection Duan Weiyu embodiment 6 is identical.
For the protection metal pipe-wall, prolong the cylinder working life, at groove highlight welding abrasionproof fin.The existing abrasionproof effect of short abrasionproof fin has been strengthened the heat-transfer effect of pipe again.The welding method of abrasionproof fin is seen Figure 14.
Based on design of the present utility model, can find that described inner/outer tube can have multiple structure (groove number 0～18) and combining form, any embodiment based on the utility model thinking all belongs within the protection domain of the present utility model.
Claims (9)
1. a drum-type high-temperature powder cooling device is characterized in that: be divided into radiation heat transfer section, convection section and heat conduction section according to the high-temperature powder coolant mechanism.
2. according to the described drum-type high-temperature powder of claim 1 cooling device, it is characterized in that: comprise dust sheet on inner core, urceolus, the outer tube wall and the groove on the inside and outside barrel, inner core and urceolus constitute by fin panel casing, the dust sheet is along the outer tube inner wall circumference, bend towards identically with the direction of rotation of cylinder, the setting of inner core recess edge is held grey sheet and is accepted the particle that urceolus dust sheet is shed.
3. according to the described drum-type high-temperature powder of claim 1 cooling device, it is characterized in that: described roller slag cooler is made up of swing roller, feeding mechanism, discharging mechanism, supporting mechanism, motor and transmission mechanism.
4. according to claim 1 and 2 described drum-type high-temperature powder cooling devices, it is characterized in that: inner core and urceolus can be cylindrical shape or the cylindrical shell that has groove structure.
5. according to the described drum-type high-temperature powder of claim 1 cooling device, it is characterized in that: the urceolus water-cooling wall disposed inboard of described radiation heat transfer section has the fin of heat exchange function.
6. according to the described drum-type high-temperature powder of claim 1 cooling device, it is characterized in that: described convection section by the dust sheet, hold grey sheet and groove fit and realize the effective heat convection of particle cooling structure.
7. according to the described drum-type high-temperature powder of claim 3 cooling device, it is characterized in that: cooling water inlet adopts swivel joint to be connected with outlet.
8. according to claim 1 and 2 described drum-type high-temperature powder cooling devices, it is characterized in that: inner core adopts water pipe to be connected with the contact between the urceolus.
9. according to claim 1 and 2 described drum-type high-temperature powder cooling devices, it is characterized in that: the groove highlight adopts the abrasionproof fin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200054075U CN201935617U (en) | 2011-01-10 | 2011-01-10 | Roller-type high-temperature-powder cooling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200054075U CN201935617U (en) | 2011-01-10 | 2011-01-10 | Roller-type high-temperature-powder cooling device |
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| Publication Number | Publication Date |
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| CN201935617U true CN201935617U (en) | 2011-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200054075U Expired - Fee Related CN201935617U (en) | 2011-01-10 | 2011-01-10 | Roller-type high-temperature-powder cooling device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102589330A (en) * | 2011-01-10 | 2012-07-18 | 北京亿川汇合科技有限公司 | Drum type high-temperature powder cooling device |
| CN103322560A (en) * | 2012-03-19 | 2013-09-25 | 刘柏谦 | Roller type slag cooler for eliminating false cooling of ash slag |
| CN109883223A (en) * | 2019-03-28 | 2019-06-14 | 青岛达能环保设备股份有限公司 | Pipeloop drum-type heat exchanger cylinder |
| CN112708710A (en) * | 2020-12-18 | 2021-04-27 | 重庆岩昱节能科技有限公司 | Waste heat recovery system for steel smelting |
-
2011
- 2011-01-10 CN CN2011200054075U patent/CN201935617U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102589330A (en) * | 2011-01-10 | 2012-07-18 | 北京亿川汇合科技有限公司 | Drum type high-temperature powder cooling device |
| CN103322560A (en) * | 2012-03-19 | 2013-09-25 | 刘柏谦 | Roller type slag cooler for eliminating false cooling of ash slag |
| CN109883223A (en) * | 2019-03-28 | 2019-06-14 | 青岛达能环保设备股份有限公司 | Pipeloop drum-type heat exchanger cylinder |
| CN109883223B (en) * | 2019-03-28 | 2024-04-30 | 青岛达能环保设备股份有限公司 | Tube ring roller type heat exchange cylinder |
| CN112708710A (en) * | 2020-12-18 | 2021-04-27 | 重庆岩昱节能科技有限公司 | Waste heat recovery system for steel smelting |
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| ASS | Succession or assignment of patent right |
Owner name: BEIJING YICHUAN HUIHE TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: LIU BAIQIAN Effective date: 20120104 |
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| C41 | Transfer of patent application or patent right or utility model | ||
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Free format text: CORRECT: ADDRESS; FROM: 100083 HAIDIAN, BEIJING TO: 100191 HAIDIAN, BEIJING |
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Effective date of registration: 20120104 Address after: 100191 Beijing Haidian District Huayuan Road 2 business complex building 319 Patentee after: Beijing Yichuanhuihe Technology Co., Ltd. Address before: 100083 School of mechanical engineering, School of mechanical engineering, University of Science and Technology Beijing, Xueyuan Road 30, Beijing, Haidian District Patentee before: Liu Baiqian |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110817 Termination date: 20120110 |