CN101387407B - Boiler lining edge antiwear structuring design - Google Patents
Boiler lining edge antiwear structuring design Download PDFInfo
- Publication number
- CN101387407B CN101387407B CN2007100551381A CN200710055138A CN101387407B CN 101387407 B CN101387407 B CN 101387407B CN 2007100551381 A CN2007100551381 A CN 2007100551381A CN 200710055138 A CN200710055138 A CN 200710055138A CN 101387407 B CN101387407 B CN 101387407B
- Authority
- CN
- China
- Prior art keywords
- anchor ear
- refractory
- returning charge
- lining
- boiler
- 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.)
- Active
Links
Images
Abstract
The invention provides a design of an antiwear structure for the boundary of a boiler liner; metal anchoring pieces built between boiler liners of two sides of a horizontal flue and an expansion joint are taken as a framework; an isolation reinforcing girder is made by casting refractory materials; a flow speed guide corner of a cyclone cylinder takes a ramiform metal anchoring piece row as a framework and is reinforced and fixed by casting the refractory material; the innermost layer of an antiwear boiler liner of a tangential line surface of a cyclone cylinder is precast by the refractory casting material, is bricked by large sintered refractory bricks and is fixed by the metal anchoring piece which has one end connected with a steel shell of the boiler; the cyclone cylinder is provided with a vertical and a horizontal anchor ear girders to reinforce the structural strength of the whole cylinder body; mazy expansion joints annually distributed are arranged between the top of a feed returning valve and a baiting pipe; the upper part, the lower part and the turning part of the oblique feed returning pipe are provided with three annular anchor ear girders to fix a boiler liner of an oblique feed returning pipe,; and a boiler liner of a flue gas of the rear wall on the upper part of a hearth is provided with reinforcing girders.
Description
Technical field
The present invention relates to CFBB (CFB) technology; Be particularly related to a kind of boiler lining edge antiwear structuring structural design; Be to present CFBB operation characteristic; According to the variation node of furnace lining self mechanics principle and boiler and at the interface the furnace lining structure designing material be provided with and the construction technology shaft coupling to improve, belong to the brickwork technology of CFBB.
Background technology
It is wide that CFBB adapts to coal, can use colm and spoil coal as fuel used to generate electricity, circulating combustion repeatedly in stove.China recent years has been introduced the advanced manufacturing technology of external many CFBBs, and domestic research also has significant progress, but the result of use of circulating fluid bed boiler lining is still undesirable.Because CFBB operates under the hot conditions, and variations in temperature is frequent, cycling hot is impacted serious, and the high-temp solid material and the thermal current impact wear furnace lining that carries the grit high-speed cruising of a large amount of high-speed motions arranged in the stove.The method of operation of CFBB is brought a series of damage problem to boiler lining.Though the fuel ash Mohs' hardness has only 5-7 and is divergent beams; Bulk strength far below refractory lining; But really very serious at air-flow turning point and concave-convex surface place to the wearing and tearing of furnace sidewall intense impact, so these damage outstanding behaviours are at the variation node of boiler and at the interface:
1, returning charge inclined tube lower inclined plane and outlet lower furnace corner furnace lining;
2, the bilateral furnace wall and the furnace roof of the horizontal flue section between burner hearth upper back exhanst gas outlet and the whirlwind tube smoke inlet;
3, material returning device is imported and exported;
4, furnace wall burner hearth burning bed top emulsion zone and dilute-phase zone crossover sites;
5, whirlwind tube sidewall furnace lining;
6, returning charge valve port furnace wall
The damage reason is following:
1, the interface of ciculation fluidized process wearing and tearing;
2, the intensity mutual dislocation and the disconnection of the big supporting construction of boiler component, furnace wall branch supporting construction and furnace wall material skeleton structure cause the furnace wall slippage to cave in, and structural strength is separated damage, at the damage edge interface wearing and tearing take place;
3, boiler body and the furnace wall material thermal coefficient of expansion generation thermal stress that do not match makes furnace wall distortion damage, and boundary peels off wearing and tearing;
4, lining Design is improper, causes furnace wall to have only local strength, can not resist the harm and the thermal shock damage of various uneven thermal stress in service and motivation tool shearing force.
Summary of the invention
The objective of the invention is to propose a kind of boiler lining edge antiwear structuring structural design; Carry out the subregion lining Design according to each position mechanics feature of furnace lining; Make each node of furnace lining and boundary mechanical structure reasonable, improve the abrasionproof effect, thereby prolong furnace lining service life; Reduce the medium-capital overhauling number of times, give full play to the superior perception of CFBB technology.
Technical scheme proposed by the invention is:
1, the burner hearth exhanst gas outlet is communicated with the whirlwind tube through horizontal flue, the temperature difference at consideration horizontal flue two ends possibly cause; Be provided with expansion joint at the horizontal flue middle part, and the horizontal flue both sides constitute by the common pouring fireproof material of building a wall, this structure makes that being prone to produce body of wall collapses, and the top comes off and expansion joint burns.The present invention sets up the isolation buttress brace in the both sides of horizontal flue expansion joint; Be to have constructed metal anchorage between horizontal flue both sides furnace lining and the expansion joint to make skeleton; The reinforcement isolation beams that pouring fireproof material constitutes; Horizontal flue both sides furnace lining and used for expansion joint are strengthened isolation beams and are got in touch reinforcing, and whirlwind tube flow velocity pilot angle is made skeleton with branch shape metal anchorage row, and pouring fireproof material is reinforced fixing; The wear-resisting furnace lining innermost layer of whirlwind tube tangent line planarea adopts castable refractory prefabricated and build by laying bricks or stones through the fire-resistant syphon of sintering; And fix with the metal anchorage that an end is connected on the stove outer steel shell, its skin (pressing close to the furnace shell place) is fibrofelt and the two-layer heat-insulation layer of high-strength light floating bead brick; Make internal layer and the outer layer fiber felt and the two-layer heat-insulation layer formation of the high-strength light floating bead brick compound Lining of skeleton, other position furnace lining of cast castable refractory formation whirlwind tube with metal anchorage;
2, the whirlwind tube is provided with the structural strength that anchor ear beam is in length and breadth strengthened whole cylindrical shell; Promptly at whirlwind tube and its lower end cone transition position, whirlwind tube lower end cone and tremie pipe transition position transverse annular anchor ear beam is set, the Whirlwind barrel segmentation is provided with multiple tracks transverse annular anchor ear beam; And have the vertical anchor ear beam of multiple tracks, and the vertical anchor ear beam of multiple tracks is set up along whirlwind tube circle distribution, and vertical, horizontal anchor ear beam is made skeleton cast castable refractory with metal anchorage and is constituted, and wherein metal anchorage one end is welded on the furnace shell steel plate;
3, the returning charge valve is fixed on the support, steady and sure fulcrum, on lift the cone tremie pipe, connect down and hang on the returning charge battered leg, therefore should do very firmly, allow certain surplus and make upper and lower refeed line free movable.Among the present invention the structure of rigid attachment between returning charge valve top and the tremie pipe is improved; Returning charge valve top and tremie pipe lower end are thrown off; At the two binding site the annular anchor ear beam is set; Promptly set up the annular anchor ear beam, have the labyrinth dilatation joint that is circular layout between returning charge valve top and the anchor ear beam, and adopt flexible refractory fibre to isolate on returning charge valve top.
4, great amount of high-temperature feed back ash content returns burner hearth by the returning charge inclined tube, gets into the preceding unsteady flow speed change of burner hearth, the worn area of therefore here attaching most importance to; The present invention adopts the prefabricated refractory brick that burns till of castable refractory to build the formation furnace lining by laying bricks or stones in returning charge inclined tube lower end to exit; Other working face adopts the castable refractory cast; Heat-insulation layer adopts the high-strength light floating bead brick, outermost layer (near furnace shell) thus be the flexible heat-insulating layer formation compound Lining structure that fire-retardent fiber felt-rug/piece constitutes; Be fixing returning charge inclined tube furnace lining, strengthen wearability, set up three road annular anchor ear beams with the turning point in that the returning charge inclined tube is upper and lower;
5, the furnace lining of upper furnace rear wall exhanst gas outlet has buttress brace; With anti-erosion; The wearability of horizontal flue inlet is improved, and the mechanical structure of protection horizontal flue inlet and burner hearth exhanst gas outlet joining place, buttress brace is made up of as the skeleton pouring fireproof material metal anchorage.
Compared with prior art, the invention has the beneficial effects as follows: furnace lining is prolonged service life, reduce the medium-capital overhauling number of times; Each node of furnace lining and boundary mechanical structure are reasonable, and abrasionproof is respond well, can give full play to the superiority of CFBB technology.
Description of drawings
Fig. 1 is CFB boiler furnace exhanst gas outlet border furnace lining horizontal flue and whirlwind tube furnace lining structure sketch map.
Fig. 2 is whirlwind tube tremie pipe, returning charge valve and returning charge inclined tube sketch map.
Fig. 3 is a upper furnace rear wall exhanst gas outlet furnace lining sketch map.
Fig. 4 is a whirlwind tube sidewall furnace lining structure sketch map.
Among the figure, 1, the burner hearth exhanst gas outlet, 2, the horizontal flue expansion joint, 3, isolate buttress brace, 4, branch shape heat-resistance stainless steel anchoring piece; 6, prefabricated sintered refractory block, 7, the high-strength light floating bead brick, 8, the fibrofelt heat-insulation layer, 9, the refractory brick fixed anchors, 10, pilot angle; 12, labyrinth dilatation joint, 13, whirlwind tube tremie pipe, 14, the annular anchor ear beam, 15, the returning charge valve, 16, exhanst gas outlet; 17, buttress brace, 18, V-arrangement anchoring hook, 19, castable refractory, 20, burner hearth furnace shell steel plate; 25, the vertical anchor ear beam of whirlwind tube, 26, the horizontal anchor ear beam of whirlwind tube, 27, metal anchorage, 28, bidirectional metal connects muscle.
In conjunction with accompanying drawing the embodiment of the invention is explained:
As shown in Figure 1; The burner hearth exhanst gas outlet is communicated with the whirlwind tube through horizontal flue; The high-temperature flue gas that is promptly come out by the burner hearth exhanst gas outlet gets into the whirlwind tube through horizontal flue, is provided with expansion joint 2 at the horizontal flue middle part, and the present invention sets up in the both sides of horizontal flue expansion joint and isolates buttress brace 3; Be to have constructed metal anchorage between horizontal flue both sides furnace lining and the expansion joint to make skeleton, the reinforcement isolation beams contact that pouring fireproof material constitutes is reinforced; Wherein heat-resistance stainless steel anchoring piece one end is welded on the furnace shell steel plate, between the anchoring piece laterally, vertically all connect muscle and connect through bidirectional metal.The flow velocity pilot angle is made skeleton with branch shape metal anchorage row, and pouring fireproof material is reinforced fixing.High-temperature flue gas and solid combustion particle separation mainly rely on gas-solid separator; Survey wall (also being inwall) and wash away the most serious whirlwind tube that should be; Promptly relative with the high-temperature flue gas approach axis furnace lining innermost layer of whirlwind tube tangent line planarea adopts castable refractory prefabricated and build by laying bricks or stones through the refractory brick of sintering; As can adopt prefabricated the burning till of LH-1604 corundum matter indefinite form castable refractory, can adopt also that other castable refractory is prefabricated to be burnt till, refractory brick 6 usefulness metal anchorage bolt (metal anchorage one end is welded on the furnace shell steel plate) and with the fibrofelt heat-insulation layer and the two-layer heat-insulation layer formation of high-strength light floating bead brick compound Lining of outer (pressing close to the furnace shell place); Wherein, The fibrofelt heat-insulation layer is positioned at outermost layer and is close to furnace shell, builds lightweight floating bead brick 7 again by laying bricks or stones, and innermost layer is built the refractory brick of prefabricated sintering by laying bricks or stones.Make the internal layer that skeleton, cast castable refractory constitute other position furnace lining of whirlwind tube with metal anchorage, be similarly the two-layer heat-insulation layer of fire-retardent fiber felt-rug and high-strength light floating bead brick, formation compound Lining with skin.As shown in Figure 4; For stablizing the furnace lining of whirlwind tube sidewall (also being inwall); Set up the anchor ear beam in length and breadth separately at the whirlwind tube, laterally at whirlwind tube and the oblique top of separator intersection, middle part cylinder and cone transition position; Cone and tremie pipe transition position all are provided with annular anchor ear beam 26; Vertically establish vertical anchor ear beam 25 for 45 °-60 ° by circumference, vertically anchor ear beam 25 establishes that heat-resistance stainless steel anchoring piece group 27 is made cast skeletons (anchoring piece group 27 by the two-way muscle 28 that connects of heat-resistance stainless steel from laterally, vertically connect), the cast castable refractory constitutes, and makes whirlwind tube sidewall compound Lining by anchor ear beam recomposition mechanics skeleton in length and breadth; Stablize whole furnace lining, bear the high temperature gas solid separation task of CFB boiler most critical.
As shown in Figure 2, the returning charge valve is fixed on the support, steady and sure fulcrum; On lift the cone tremie pipe, connect down and hang on the returning charge inclined tube (returning charge battered leg), therefore should do very firmly; Allowing certain surplus makes upper and lower refeed line free movable; Among the present invention returning charge valve top and tremie pipe lower end are thrown off, the annular anchor ear beam is set, promptly set up the annular anchor ear beam on returning charge valve top at the two binding site; Has the labyrinth dilatation joint that is circular layout between returning charge valve top and the anchor ear beam, the flexible refractory fibre of interior filling.The upper and lower valve body of returning charge valve makes its fixed size with stainless steel stent and the prefabricated installation of castable refractory.Isolation tongue prefabricated by refractory material and that burn till is set in the returning charge lectulum simultaneously, makes the life-span and the whole gas-solid separator of under lotus condition at quarter, isolating tongue synchronous.Adopt the prefabricated refractory brick that burns till of castable refractory in returning charge inclined tube lower end to exit; Build the formation furnace lining by laying bricks or stones; Other working face adopts castable refractory to constitute furnace lining internal layer working face; Heat-insulation layer adopts the high-strength light floating bead brick, outermost layer (near furnace shell) thus be the flexible heat-insulating layer formation compound Lining structure that fire-retardent fiber felt-rug/piece constitutes.Be fixing returning charge inclined tube furnace lining, strengthen wearability, connect the returning charge inclined tube at the returning charge lectulum and set up three road annular anchor ear beams 14 at the upper and lower light folding of inclined tube place, be anchor ear beam on the returning charge inclined tube to burning band.
As shown in Figure 3; Exhanst gas outlet 16 sidewalls are cast with buttress brace 17; The furnace lining that is upper furnace rear wall exhanst gas outlet and horizontal flue flue gas import joining place has buttress brace 17, heat-resistance stainless steel V-arrangement anchoring hook 18 is set in the buttress brace makes skeleton, and cast castable refractory 19 constitutes; Anchoring hook 18 1 ends are welded on the burner hearth steel plate 20, and the design of buttress brace makes this part furnace lining can adapt to the high-temperature smoke particle and contains washing away of corrosive gas SO2.
Claims (1)
1. boiler lining edge antiwear structuring structure is characterized in that:
(1), sets up the reinforcement isolation beams in the both sides of horizontal flue expansion joint; Be to have constructed metal anchorage between horizontal flue both sides furnace lining and the expansion joint to make skeleton; The reinforcement isolation beams that pouring fireproof material constitutes; Horizontal flue both sides furnace lining and used for expansion joint are strengthened isolation beams and are got in touch reinforcing, and whirlwind tube flow velocity pilot angle is made skeleton with branch shape metal anchorage row, and pouring fireproof material is reinforced fixing; The wear-resisting furnace lining innermost layer of whirlwind tube tangent line planarea adopts castable refractory prefabricated and build by laying bricks or stones through the fire-resistant syphon of sintering; And fix with the metal anchorage that an end is connected on the stove outer steel shell, the skin of pressing close to stove outer steel shell place is fibrofelt and the two-layer heat-insulation layer of high-strength light floating bead brick; Make internal layer and the outer layer fiber felt and the two-layer heat-insulation layer formation of the high-strength light floating bead brick compound Lining of skeleton, other position furnace lining of cast castable refractory formation whirlwind tube with metal anchorage;
(2), the whirlwind tube is provided with the structural strength that anchor ear beam is in length and breadth strengthened whole cylindrical shell; Promptly at whirlwind tube and its lower end cone transition position, whirlwind tube lower end cone and tremie pipe transition position transverse annular anchor ear beam is set, the Whirlwind barrel segmentation is provided with multiple tracks transverse annular anchor ear beam; And have the vertical anchor ear beam of multiple tracks, and the vertical anchor ear beam of multiple tracks is set up along whirlwind tube circle distribution, and vertical, horizontal anchor ear beam is made skeleton cast castable refractory with metal anchorage and is constituted, and wherein metal anchorage one end is welded on the stove outer steel shell;
(3), returning charge valve top and tremie pipe lower end are thrown off, the annular anchor ear beam is set, promptly sets up the annular anchor ear beam, have the labyrinth dilatation joint that is circular layout between returning charge valve top and the anchor ear beam, interior filling flexibility refractory fibre on returning charge valve top at the two binding site;
(4), adopt the prefabricated refractory brick that burns till of castable refractory to build the formation furnace lining by laying bricks or stones in returning charge inclined tube lower end to exit; Other working face adopts the castable refractory cast; Heat-insulation layer adopts the high-strength light floating bead brick, thereby the flexible heat-insulating layer that outermost layer is fire-retardent fiber felt-rug/piece to be constituted constitutes the compound Lining structure; Be fixing returning charge inclined tube furnace lining, set up three road annular anchor ear beams with the turning point in that the returning charge inclined tube is upper and lower;
(5), the furnace lining of upper furnace rear wall exhanst gas outlet has buttress brace, buttress brace is made up of as the skeleton pouring fireproof material metal anchorage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100551381A CN101387407B (en) | 2007-09-11 | 2007-09-11 | Boiler lining edge antiwear structuring design |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100551381A CN101387407B (en) | 2007-09-11 | 2007-09-11 | Boiler lining edge antiwear structuring design |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101387407A CN101387407A (en) | 2009-03-18 |
| CN101387407B true CN101387407B (en) | 2012-04-25 |
Family
ID=40476969
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007100551381A Active CN101387407B (en) | 2007-09-11 | 2007-09-11 | Boiler lining edge antiwear structuring design |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101387407B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102179319A (en) * | 2011-03-29 | 2011-09-14 | 广州迪森热能技术股份有限公司 | Cyclone separator for ecological oil |
| CN106556019A (en) * | 2016-11-14 | 2017-04-05 | 联合矿产（天津）有限公司 | A kind of furnace flue flashboard structure |
| CN114353506B (en) * | 2022-01-27 | 2023-06-23 | 中冶长天国际工程有限责任公司 | Annular channel structure for double-chamber lime kiln |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4228914A1 (en) * | 1992-08-28 | 1994-03-03 | Ver Energiewerke Ag | Armoured plate cooling holder for heat and wear exposed duct - has insulation with secures for cooled pipes held by armoured plate fasteners. |
| US5704782A (en) * | 1993-11-17 | 1998-01-06 | N.V. Gouda Vuurvast | Wear lining for a rotary furnace |
| CN2508131Y (en) * | 2001-10-23 | 2002-08-28 | 洛阳市洛华粉体工程特种耐火材料厂 | Top new non-metal hanging lining structure of circular fluid-bed boiler |
| CN2508130Y (en) * | 2001-10-23 | 2002-08-28 | 洛阳市洛华粉体工程特种耐火材料厂 | Composite side wall and wall liner using metal anchor as skeleton for circulation fluid-bed boiler |
| CN2568984Y (en) * | 2002-09-11 | 2003-08-27 | 周锦才 | Energy saving composite lining of industrial boiler |
| CN1598463A (en) * | 2004-08-30 | 2005-03-23 | 李建新 | Structure of furnace top for combustion furnace |
-
2007
- 2007-09-11 CN CN2007100551381A patent/CN101387407B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4228914A1 (en) * | 1992-08-28 | 1994-03-03 | Ver Energiewerke Ag | Armoured plate cooling holder for heat and wear exposed duct - has insulation with secures for cooled pipes held by armoured plate fasteners. |
| US5704782A (en) * | 1993-11-17 | 1998-01-06 | N.V. Gouda Vuurvast | Wear lining for a rotary furnace |
| CN2508131Y (en) * | 2001-10-23 | 2002-08-28 | 洛阳市洛华粉体工程特种耐火材料厂 | Top new non-metal hanging lining structure of circular fluid-bed boiler |
| CN2508130Y (en) * | 2001-10-23 | 2002-08-28 | 洛阳市洛华粉体工程特种耐火材料厂 | Composite side wall and wall liner using metal anchor as skeleton for circulation fluid-bed boiler |
| CN2568984Y (en) * | 2002-09-11 | 2003-08-27 | 周锦才 | Energy saving composite lining of industrial boiler |
| CN1598463A (en) * | 2004-08-30 | 2005-03-23 | 李建新 | Structure of furnace top for combustion furnace |
Non-Patent Citations (2)
| Title |
|---|
| JP特开2001-304768A 2001.10.31 |
| JP特开2004-150755A 2004.05.27 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101387407A (en) | 2009-03-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101261079B (en) | Large area air outlet fluidized calcining furnace refractory lining | |
| CN101387408B (en) | Domestic lining structure for large-sized circulating fluidized bed boiler | |
| CN108603660B (en) | Top combustion hot blast stove | |
| CN204174222U (en) | The repair structure of iron-making heat wind furnace hot air duct and repairing mould thereof | |
| CN101387407B (en) | Boiler lining edge antiwear structuring design | |
| CN101261081A (en) | Fluidized calcining furnace ball arc furnace top and method of forming same | |
| CN101387399B (en) | Fixation structure design and installation method for core separator in large-sized industrial furnace | |
| CN101261086A (en) | Trihydrate alumina gas phase fluidization calcining furnace lining | |
| CN109652603B (en) | Semi-pouring type blast furnace hot blast stove pipeline and construction method thereof | |
| CN212538737U (en) | Large horizontal tubular kiln | |
| CN2508130Y (en) | Composite side wall and wall liner using metal anchor as skeleton for circulation fluid-bed boiler | |
| CN111750663A (en) | Large horizontal tubular kiln | |
| CN201000274Y (en) | High efficiency energy conservation tunnel kiln | |
| CN2826192Y (en) | Novel high-efficiency blower boiler combustor lining | |
| CN203530216U (en) | Large-scale coke oven gas riser structure | |
| CN201137932Y (en) | Circulating fluid bed boiler coal drop pipe wear prevention structure | |
| CN216337752U (en) | Novel furnace lining structure for integral casting forming of large-scale blast furnace | |
| CN106642088B (en) | A kind of metalloid core cylinder in recirculating fluidized bed whirlwind separator | |
| CN201438079U (en) | Vault structure of iron-making smelting reduction gasification furnace | |
| CN213630402U (en) | Be used for fluidized bed boiler secondary tuber pipe structure | |
| CN101738082B (en) | Smelting palletizing shaft furnace air-guiding wall and building method thereof | |
| CN203431845U (en) | Antiwear structure for circulating fluidized bed boiler (CFBB) | |
| CN218842052U (en) | Bracket structure of chute of dry quenching furnace | |
| CN111895789A (en) | Large horizontal high-temperature tubular shakeproof furnace lining and manufacturing method thereof | |
| CN202484980U (en) | Blast furnace and converter gas mixed combustion gas-fired boiler internally provided with heat accumulator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: LUOYANG LUOHUA POWDER ENGINEERING SPECIAL REFRACTO Free format text: FORMER OWNER: LI CHAOXIA Effective date: 20150225 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 471003 LUOYANG, HENAN PROVINCE TO: 471621 LUOYANG, HENAN PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20150225 Address after: 471621 Feng Li Industrial Zone, Henan, Luoyang Patentee after: Powder technology special refractories Co., Ltd of Lip river, Luoyang City China Address before: 471003 box 555, Henan University of Science and Technology, Jianxi District, Henan, Luoyang Patentee before: Li Chaoxia |