CN203474830U - Hot-blast stove for jet mixing of gas and air by circularly and uniformly distributed nozzles inside combustion chamber - Google Patents
Hot-blast stove for jet mixing of gas and air by circularly and uniformly distributed nozzles inside combustion chamber Download PDFInfo
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- CN203474830U CN203474830U CN201320565338.2U CN201320565338U CN203474830U CN 203474830 U CN203474830 U CN 203474830U CN 201320565338 U CN201320565338 U CN 201320565338U CN 203474830 U CN203474830 U CN 203474830U
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Abstract
The utility model relates to a hot-blast stove for jet mixing of gas and air by using circularly and uniformly distributed nozzles inside a combustion chamber, and effectively solves the problems of low combustion strength and complicated structure of a combustor. The hot-blast stove is structurally characterized in that a wall body of the combustion chamber is in a spherical dome shape; a comburent ceramic porous body is formed inside the wall body; the wall body of the combustion chamber is connected with a wall body of a combustor into a whole; a gas intake pipe and an air intake pipe are correspondingly arranged on a cylinder of the wall body of the combustor and vertical to the axis of the cylinder of the wall body of the combustor; the gas intake pipe and the air intake pipe are respectively communicated with a gas distribution loop and an air distribution circulation loop; a plurality of gas combined nozzle channels and air nozzle channels with rectangular sections are correspondingly evenly distributed on the inner ring walls of the gas distribution loop and the air distribution loop respectively; the inner side of the lower cylinder of the wall body of the combustor and the outer side of the upper inner cylinder of the wall body of a regenerative chamber are sleeved together through a ladder seam type labyrinth sealing connection structure in a slippage manner; a wall body of a cooled air chamber at the lower part of a grate and the internal space of a hearth form the cooled air chamber. The hot-blast stove is energy-saving, efficient, environment-friendly, and high in work efficiency.
Description
Technical field
The utility model relates to hotblast stove, especially for the hotblast stove that in a kind of combustion chamber of high temperature blast, annular uniform nozzle coal gas mixes with air spray is provided for blast furnace.
Background technology
Blast funnace hot blast stove is equipment conventional in industrial production, particularly essential especially in Iron and Steel Production, blast funnace hot blast stove is considered to require under lower heat of combustion blast furnace gas, to obtain high-performance and high benefit from energy-saving and cost-reducing, and finally reach efficiently, the object of energy-saving and environmental protection, volume increase.For this reason, in hotblast stove, must realize the combustion processes of the optimizing stove internal procedure that combines with the heat transfer process of strengthening.This just relates to structure, heat storage body structure and the layout of combustion unit and the tissue of air velocity distribution.Due to structural problem, make a general survey of the various hotblast stoves of current use, its gas combustion apparatus all take that coal gas mixes in combustion space with air, preheating, ignition pattern be as main, and this pattern always exists the problem such as mix inequality, incomplete combustion, the bags is large, burner structure is complicated; And air current composition misorient (application of flow velocity selection, distribution of air flow and control, eddy flow and reflux state etc.) in combustion chamber and regenerator, cause that in combustion chamber, the changing features of combustion gas flowing is large, air-flow is unstable, intensity of combustion is low, and then cause air-flow skewness in regenerator, reduce the utilization ratio of heat-transfer effect and heat storage; Because the structure of heat storage is all difficult to choose according to flow field structure and load condition with arranging, thereby therefore the performance of entire effect hotblast stove and practical effect, are further improved and innovate.
Summary of the invention
For above-mentioned situation, for overcoming the defect of prior art, the object of the utility model is just to provide the hotblast stove that in a kind of combustion chamber, annular uniform nozzle coal gas mixes with air spray, can effectively solve coal gas low with air mixed speed, mix inhomogeneously, intensity of combustion is low, temperature of combustion is low, incomplete combustion, the bags is large and burner structure is complicated problem.
The technical scheme that the utility model solves is, comprise combustion chamber body of wall, burner body of wall, gas inlet pipe, air intake duct, gas allocation circuit, air distributes circuit and regenerator body of wall, combustion chamber body of wall is spherical vault shape, its interior tapered combustion-supporting ceramic porous article that is stacked with, the burner body of wall of the cylinder shape structure of combustion chamber body of wall and bottom is connected as a single entity, space in burner body of wall is a part for regenerator, on the cylinder of burner body of wall, vertical its axis correspondence is furnished with gas inlet pipe and air intake duct, gas inlet pipe and air intake duct are vertical or tilt and be connected with air distribution circuit with the gas allocation circuit of building by laying bricks or stones in burner body of wall respectively, gas allocation circuit and air distribute corresponding coal gas built up nozzle passage and the air nozzle passage that is evenly equipped with respectively a plurality of square-sections on the inner side ringwall of circuit, coal gas built up nozzle passage be take the unitized construction that three nozzles are a group, horizontal radial or stretch into the sidewall that coal gas and air pre-mixing are healed up to be less than the inclination angle of 30 °, air nozzle passage and air distribute that the inner side ringwall of circuit is separated upwards vertically stretches into the bottom that coal gas and air pre-mixing are healed up, air nozzle channel cross-section is fan-shaped, upper opening is aperture, along burner ringwall, be uniformly distributed in the bottom of premix controlled atmosphere joint circuit, the connection combustion chamber, upper surface of premix controlled atmosphere joint circuit, on burner body of wall, on a part of body of wall of gas allocation circuit place height location, be provided with the hot-blast outlet pipe of vertical its axis, gas allocation circuit is the imperfect annulus of breakaway-element, the cylinder inner side, bottom of burner body of wall and the top inner layer cylinder wall outer side of regenerator body of wall, through connecting together of the ladder seam mutual slip of labyrinth seal syndeton, at columnar regenerator body of wall and cold air chamber's body of wall and furnace bottom intersection, be horizontally disposed with the tabular fire grate of porous, fire grate is placed on many pillar stiffeners above furnace bottom, in regenerator, have from fire grate and upwards by checker brick or refractory ball, pile up the porous regenerator body to burner upper surface, cold air chamber's body of wall of fire grate bottom and the internal space of furnace bottom form cold air chamber, vertical smoke outlet tube and cold wind inlet pipe that the body of wall Shang Youyu cold air chamber at cold air chamber place communicates.
The utility model novel structure is unique, efficient energy-saving, environmental protection, working efficiency is high, effectively solve existing hotblast stove coal gas low with air mixed speed, mix inhomogeneous, intensity of combustion is low, temperature of combustion is low, incomplete combustion, the bags is large and burner structure is complicated problem, be the innovation on hotblast stove, have good economic and social benefit.
Accompanying drawing explanation
Fig. 1 is sectional front view of the present utility model.
Fig. 2 is B-B portion sectional view in the utility model Fig. 1.
Fig. 3 is A-A portion sectional view in the utility model Fig. 1.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is elaborated.
Shown in Fig. 1-3, the utility model comprises combustion chamber body of wall 1a, burner body of wall 1b, gas inlet pipe 3, air intake duct 4, gas allocation circuit 5, air distributes circuit 6 and regenerator body of wall, combustion chamber body of wall 1a is spherical vault shape, its interior tapered combustion-supporting ceramic porous article 11 that is stacked with, the burner body of wall 1b of the cylinder shape structure of combustion chamber body of wall 1a and bottom is connected as a single entity, space in burner body of wall 1b is a part for regenerator 10, on the cylinder of burner body of wall 1b, vertical its axis correspondence is furnished with gas inlet pipe 3 and air intake duct 4, gas inlet pipe 3 and air intake duct 4 are vertical or tilt and be connected with air distribution circuit 6 with the gas allocation circuit 5 of building by laying bricks or stones in burner body of wall respectively, gas allocation circuit 5 and air distribute corresponding coal gas built up nozzle passage 7 and the air nozzle passage 8 that is evenly equipped with respectively a plurality of square-sections on the inner side ringwall of circuit 6, coal gas built up nozzle passage 7 be take the unitized construction that three nozzles are a group, horizontal radial or stretch into heal up 9 sidewall of coal gas and air pre-mixing to be less than the inclination angle of 30 °, air nozzle passage 8 and air distribute separated upwards vertical heal up 9 the bottom of coal gas and air pre-mixing of stretching into of the inner side ringwall of circuit 6, air nozzle passage 8 cross sections are fan-shaped, upper opening is aperture, along burner ringwall, be uniformly distributed in the bottom of premix controlled atmosphere joint circuit 9a, the connection combustion chamber, upper surface 2 of premix controlled atmosphere joint circuit 9a, the upper hot-blast outlet pipe 17 that is provided with vertical its axis on a part of body of wall of gas allocation circuit 5 place height location of burner body of wall 1b, the imperfect annulus that gas allocation circuit 5 is breakaway-element, the cylinder inner side, bottom of burner body of wall 1b and the top inner layer cylinder wall outer side of regenerator body of wall 1c, through connecting together of ladder seam labyrinth seal syndeton 18 mutual slips, at columnar regenerator body of wall 1cYu cold air chamber's body of wall and furnace bottom 1d intersection, be horizontally disposed with the tabular fire grate of porous 13, fire grate 13 is placed on many pillar stiffeners above furnace bottom, in regenerator 10, have from fire grate and upwards by checker brick or refractory ball, pile up the porous regenerator body 12 to burner upper surface, cold air chamber's body of wall of fire grate 13 bottoms and the internal space of furnace bottom 1d form cold air chamber 14, vertical smoke outlet tube 16 and cold wind inlet pipe 15 that the body of wall Shang Youyu cold air chamber at cold air chamber place communicates.Cold air chamber's body of wall is the extension of cylindric regenerator body of wall, and furnace bottom is its end cap.
Described combustion chamber body of wall 1a and burner body of wall 1b are on metal shell inwall and build the refractory masses formation of high temperature resistant 1300 ℃～1500 ℃ by laying bricks or stones, and resistant to elevated temperatures refractory masses is by the resistance to material of heavy (Low Creep High Alumina Bricks or andaluzite high alumina brick) internal layer and the outer complex body forming of the resistance to material of lightweight (high alumina gathers light brick).
The ceramic fiber cotton of described combustion chamber body of wall 1a, refractory masses and outer outside is combined and is formed combustion chamber with sprayed coating, taperedly in combustion chamber is stacked with combustion-supporting ceramic porous article 11, the heat storage checkerwork cell intercommunication of checker brick formations different from bottom.
Described gas inlet pipe 3 and air intake duct 4 are on inner wall of metal tube, to build the circular passage that refractory materials (as high alumina brick or clay brick) forms by laying bricks or stones, gas inlet pipe 3 air intake ducts 4 are separately positioned on top and the bottom of burner cylindrical shell, and gas inlet pipe 4 and air intake duct 4a are all connected to the angle of 0～30 ° the gas allocation circuit 5 and the air that are arranged at the square-section in burner body of wall 1b and distribute on the outside ringwall of circuit 6.
Described gas allocation circuit 5 ringwall tops, inner side have a plurality of with the circumferential equally distributed coal gas built up nozzle passage 7 of circuit, coal gas built up nozzle passage 7 consists of three horizontally disposed jet of rectangular sections opening, level or be connected to be less than the inclination angle of 30 ° on the exterior wall of coal gas and air mixed mouth 9; Air distributes circuit 6 ringwall tops, inner side to have and corresponding a plurality of with the circumferential equally distributed air nozzle passage 8 of circuit of coal gas built up nozzle passage, and its cross section is fan-shaped or rectangle, accesses vertically upward the bottom of coal gas and air mixed mouth 9; At coal gas and above air mixed mouth 9, be provided with premix controlled atmosphere joint circuit 9a, the annular groove shape of the upper opening that premix controlled atmosphere joint circuit 9a cross section is inverted trapezoidal.
Described hot-blast outlet pipe 17 is to build with Low Creep High Alumina Bricks or andaluzite the corundum brick refractory materials of stable performance (high temperature resistant and) circle forming by laying bricks or stones.
Described regenerator body of wall 1c is the cylinder consisting of the siliceous brick of refractory materials or andaluzite matter brick, High-Alumina brick, clayey brick masonry respectively from top to bottom on metal shell inwall.
Described porous regenerator body 12 forms for being stacked at checker brick in regenerator, that it is arranged in order from top to bottom is the first heat storage 12a, the second heat storage 12b and the 3rd heat storage 12c, the first heat storage 12a is siliceous checker brick, the second heat storage 12b is andaluzite high alumina checker brick, the 3rd heat storage 12c is andaluzite clay checker brick, the checkerwork cell of checker brick is taper circular hole, has the groove of intercommunication between checkerwork cell and checkerwork cell; The fire grate 13 that supports porous regenerator body is porous inseries of being made by heat resisting iron, is placed on the pillar stiffener of heat resisting iron, and pillar stiffener is placed in cold air chamber 14.
The integrative-structure that with cold air chamber body of wall 1d be connected of described smoke outlet tube 16 and cold wind inlet pipe 15 for building on inner wall of metal tube that refractory materials (being generally clay brick) forms by laying bricks or stones, the body of wall 1d of cold air chamber and discoidal furnace bottom are fixed together, and have the stability intensive aspect that is become groined type by I shape channel-section steel lay-up in furnace bottom.
Working condition of the present utility model is, in burner, coal gas and air are drawn uniform coal gas built up nozzle passage (7) and air nozzle passage (8) by distribution circuit (5 and 6) inner side separately, and in healing up (9), coal gas and air pre-mixing enters premix controlled atmosphere joint circuit 9a after quadrature hybrid, after completing further mutual mixing, enter combustion chamber (2), such premixed flow (or half premixed flow) continues vertical up or up with certain eddy flow, complete combustion processes in the combustion-supporting ceramic porous article (11) of taper turning back to enter in being deposited in combustion chamber after the preheating of backflow high-temperature flue gas, most of high-temperature flue gas after burning enters downwards in heat storage (12), a part enters backflow flue gas region (the backflow flow field that air-flow forms in up and exhumation process) and in order to realize, up premixed flow is carried out preheating and made its ignition, because the existence of this part reflux airflow makes whole downward air velocity distribution be easy to become comparatively even.Hotblast stove adopts after this flow burning mode, just efficiently solves the key issues such as low-heat value gas combustion is unstable, intensity of combustion weak, temperature of combustion is low; The long flame combustion system that takies a large amount of combustion spaces burning while mixing between coal gas and air is changed into the mode of the combustion-supporting burning of this multithread thigh quadrature pre-mixing coal gas and airstream and employing ceramic porous article, not only improve the completeness of burning but also dwindled the bags, and by the up part forming of turning back of air-flow, be in the backflow vortex in combustion-supporting ceramic porous article, can realize that stablizing of flame (burning) can reach again strengthening preheating coal gas and air pre-mixing air-flow and the object that improves partial combustion temperature.Because combustion processes completes in combustion-supporting ceramic porous article (11), thereby can effectively improve the temperature (no better than temperature of combustion) of combustion-supporting ceramic porous article (11) and the first heat storage (12a), for providing high wind-warm syndrome to create very favourable condition.If the heat storage in regenerator adopts the structure of checkerwork cell intercommunication or adopts refractory ball to pile up, because of its pressure regulation current balance function to air-flow more intense, can effectively improve the utilization ratio of heat storage and strengthen heat exchanging process, therefore the spatial altitude of regenerator also can reduce.Especially in the air-supply stage of hotblast stove, the pressure regulation current balance function of heat storage is more obvious for the homogeneity effect of improving the distribution of cold wind air-flow.Therefore, for the hotblast stove of other gas combustion apparatus of employing, the utility model is realized the steady flame of backflow preheat and high-intensity combustion in quick premix, combustion-supporting porous insert by multi-nozzle quadrature hybrid, and in even heat storage, air-flow distributes and realizes the high duty heat transfer in regenerator.So just can greatly improve the thermal property of hotblast stove, make the hotblast stove can be under the condition of lower heat of combustion coal gas, at coal gas and air all under the condition of not preheating, possessed efficient, high wind-warm syndrome, with the function of energy-conserving and environment-protective.In addition, the further simplification of structure not only can bring the saving of investment cost with compact, is also the stable condition that provides the foundation of hotblast stove structure.
In a word, the utility model adopts under spherical vault combustion chamber annular burner structure is set, due to coal gas and the annular uniform and multithread thigh quadrature hybrid of air nozzle, realize coal gas and air and complete mixing process in coal gas and air mixed mouth, and by the upper spray and the formed backflow turbulent structure of exhumation process that mix gas, cause the environment of reflux steady flame and high-intensity combustion, enter subsequently in the combustion-supporting ceramic porous article of the taper stacking being stacked in combustion chamber and complete combustion processes.Because the heat storage in the lower regenerator of combustion-supporting ceramic porous article and its all adopts the wide grid brick of piling up side seam of minor diameter big hole pitch and checkerwork cell and checkerwork cell intercommunication, can further adjust air-flow distribution and enhancing air-flow heat exchanging process with it.Use the hotblast stove of this structure can effectively realize efficient, the high temperature of hotblast stove, average rate, high-heat strength and safety and stablization and move, then reach fuel saving, save investment, reduce spent air temperture with the quantity discharged of obnoxious flavour, the good result of minimizing environmental pollution.
Claims (9)
1. the hotblast stove that in a combustion chamber, annular uniform nozzle coal gas mixes with air spray, comprise combustion chamber body of wall (1a), burner body of wall (1b), gas inlet pipe (3), air intake duct (4), gas allocation circuit (5), air distributes circuit (6) and regenerator body of wall, it is characterized in that, combustion chamber body of wall (1a) is spherical vault shape, the tapered combustion-supporting ceramic porous article (11) that is stacked with in it, combustion chamber body of wall (1a) is connected as a single entity with the burner body of wall (1b) of the cylinder shape structure of bottom, space in burner body of wall (1b) is a part for regenerator (10), on the cylinder of burner body of wall (1b), vertical its axis correspondence is furnished with gas inlet pipe (3) and air intake duct (4), gas inlet pipe (3) and air intake duct (4) are vertical or tilt and be connected with air distribution circuit (6) with the gas allocation circuit (5) of building by laying bricks or stones in burner body of wall respectively, gas allocation circuit (5) and air distribute corresponding coal gas built up nozzle passage (7) and the air nozzle passage (8) that is evenly equipped with respectively a plurality of square-sections on the inner side ringwall of circuit (6), coal gas built up nozzle passage (7) be take the unitized construction that three nozzles are a group, horizontal radial or to be less than the sidewall that coal gas is stretched at the inclination angle of 30 ° and air pre-mixing is healed up (9), air nozzle passage (8) and air distribute separated the making progress of the inner side ringwall of circuit (6) vertically to stretch into coal gas and the heal up bottom of (9) of air pre-mixing, air nozzle passage (8) cross section is fan-shaped, upper opening is aperture, along burner ringwall, be uniformly distributed in the bottom of premix controlled atmosphere joint circuit (9a), the connection combustion chamber, upper surface (2) of premix controlled atmosphere joint circuit (9a), the upper hot-blast outlet pipe (17) that is provided with vertical its axis on a part of body of wall of gas allocation circuit (5) place height location of burner body of wall (1b), the imperfect annulus that gas allocation circuit (5) is breakaway-element, the cylinder inner side, bottom of burner body of wall (1b) and the top inner layer cylinder wall outer side of regenerator body of wall (1c), through connecting together of the mutual slip of ladder seam labyrinth seal syndeton (18), at columnar regenerator body of wall (1c) and cold air chamber's body of wall and furnace bottom (1d) intersection, be horizontally disposed with the tabular fire grate of porous (13), fire grate (13) is placed on many pillar stiffeners above furnace bottom, in regenerator (10), have from fire grate and upwards by checker brick or refractory ball, pile up the porous regenerator body (12) to burner upper surface, cold air chamber's body of wall of fire grate (13) bottom and the internal space of furnace bottom (1d) form cold air chamber (14), vertical smoke outlet tube (16) and cold wind inlet pipe (15) that the body of wall Shang Youyu cold air chamber at cold air chamber place communicates.
2. the hotblast stove that in combustion chamber according to claim 1, annular uniform nozzle coal gas mixes with air spray, it is characterized in that, described combustion chamber body of wall (1a) and burner body of wall (1b) are on metal shell inwall and build the refractory masses formation of high temperature resistant 1300 ℃～1500 ℃ by laying bricks or stones, and resistant to elevated temperatures refractory masses is the complex body consisting of the heavy internal layer of resistance to material and the lightweight skin of resistance to material.
3. the hotblast stove that in combustion chamber according to claim 1, annular uniform nozzle coal gas mixes with air spray, it is characterized in that, the ceramic fiber cotton of described combustion chamber body of wall (1a), refractory masses and outer outside and sprayed coating are combined and are formed combustion chamber, the tapered combustion-supporting ceramic porous article (11) that is stacked with in combustion chamber, the heat storage checkerwork cell intercommunication that checker brick different from bottom form.
4. the hotblast stove that in combustion chamber according to claim 1, annular uniform nozzle coal gas mixes with air spray, it is characterized in that, described gas inlet pipe (3) and air intake duct (4) are on inner wall of metal tube, to build the circular passage that refractory materials forms by laying bricks or stones, gas inlet pipe (3) air intake duct (4) is separately positioned on top and the bottom of burner cylindrical shell, gas inlet pipe (4) and air intake duct (4a) are all connected to and are arranged on the gas allocation circuit (5) of the square-section in burner body of wall (1b) and the outside ringwall of air distribution circuit (6) with the angle of 0～30 °.
5. the hotblast stove that in combustion chamber according to claim 1, annular uniform nozzle coal gas mixes with air spray, it is characterized in that, described ringwall top, gas allocation circuit (5) inner side has a plurality of with the circumferential equally distributed coal gas built up nozzle passage of circuit (7), coal gas built up nozzle passage (7) consists of three horizontally disposed jet of rectangular sections opening, level or be connected to be less than the inclination angle of 30 ° on the exterior wall of coal gas and air mixed mouth (9); Air distributes ringwall top, circuit (6) inner side to have and corresponding a plurality of with the circumferential equally distributed air nozzle passage of circuit (8) of coal gas built up nozzle passage, and its cross section is fan-shaped or rectangle, accesses vertically upward the bottom of coal gas and air mixed mouth (9); At coal gas and above air mixed mouth (9), be provided with premix controlled atmosphere joint circuit (9a), the annular groove shape of the upper opening that premix controlled atmosphere joint circuit (9a) cross section is inverted trapezoidal.
6. the hotblast stove that in combustion chamber according to claim 1, annular uniform nozzle coal gas mixes with air spray, is characterized in that, described hot-blast outlet pipe (17) is to build with Low Creep High Alumina Bricks or andaluzite corundum brick the circle forming by laying bricks or stones.
7. the hotblast stove that in combustion chamber according to claim 1, annular uniform nozzle coal gas mixes with air spray, it is characterized in that, described regenerator body of wall (1c) is the cylinder consisting of the siliceous brick of refractory materials or andaluzite matter brick, High-Alumina brick, clayey brick masonry respectively from top to bottom on metal shell inwall.
8. the hotblast stove that in combustion chamber according to claim 1, annular uniform nozzle coal gas mixes with air spray, it is characterized in that, described porous regenerator body forms for being stacked at checker brick in regenerator, that it is arranged in order from top to bottom is the first heat storage (12a), the second heat storage (12b) and the 3rd heat storage (12c), the first heat storage (12a) is siliceous checker brick, the second heat storage (12b) is andaluzite high alumina checker brick, the 3rd heat storage (12c) is andaluzite clay checker brick, the checkerwork cell of checker brick is taper circular hole, the groove that has intercommunication between checkerwork cell and checkerwork cell, the fire grate (13) that supports porous regenerator body is the porous insert of being made by heat resisting iron, is placed on the pillar stiffener of heat resisting iron, and pillar stiffener is placed in cold air chamber (14).
9. the hotblast stove that in combustion chamber according to claim 1, annular uniform nozzle coal gas mixes with air spray, it is characterized in that, described smoke outlet tube (16) and cold wind inlet pipe (15) integrative-structure being connected with cold air chamber body of wall (1d) for building that refractory materials forms on inner wall of metal tube by laying bricks or stones, cold air chamber's body of wall (1d) is fixed together with discoidal furnace bottom, has the stability intensive aspect that is become groined type by I shape channel-section steel lay-up in furnace bottom.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320565338.2U CN203474830U (en) | 2013-09-12 | 2013-09-12 | Hot-blast stove for jet mixing of gas and air by circularly and uniformly distributed nozzles inside combustion chamber |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320565338.2U CN203474830U (en) | 2013-09-12 | 2013-09-12 | Hot-blast stove for jet mixing of gas and air by circularly and uniformly distributed nozzles inside combustion chamber |
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| CN203474830U true CN203474830U (en) | 2014-03-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115155281A (en) * | 2022-07-08 | 2022-10-11 | 中钢设备有限公司 | Flue gas denitration hot blast stove |
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2013
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115155281A (en) * | 2022-07-08 | 2022-10-11 | 中钢设备有限公司 | Flue gas denitration hot blast stove |
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Owner name: HUBEI ZHONGNAI NEW MATERIAL TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: ZHENGZHOU HUAXIN REFRACTORIES INDUSTRIAL CO., LTD. Effective date: 20141203 |
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Free format text: CORRECT: ADDRESS; FROM: 452385 ZHENGZHOU, HENAN PROVINCE TO: 432724 SUIZHOU, HUBEI PROVINCE |
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Effective date of registration: 20141203 Address after: 432724 metallurgical Avenue, Yang Zhen Town, Guangshui, Hubei Patentee after: Hubei Sino New Material Technology Co.,Ltd. Address before: 452385 Xinmi City, Henan province Zhengzhou City railway station Patentee before: ZHENGZHOU HUAXIN REFRACTORIES INDUSTRIAL CO.,LTD. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20140312 Termination date: 20210912 |