CN204084374U - Oxygen enrichment flameless gas burner - Google Patents

Oxygen enrichment flameless gas burner Download PDF

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Publication number
CN204084374U
CN204084374U CN201420579874.2U CN201420579874U CN204084374U CN 204084374 U CN204084374 U CN 204084374U CN 201420579874 U CN201420579874 U CN 201420579874U CN 204084374 U CN204084374 U CN 204084374U
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Prior art keywords
oxygen
air
spray pipe
burner
precombustion chamber
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Active
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CN201420579874.2U
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Inventor
李卫杰
刘豪
周末
段殿勇
涂垚杰
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Zhongye South (Wuhan) Thermal Engineering Co., Ltd.
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Wisdri Wuhan Wis Industrial Furnace Co Ltd
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Priority to CN201420579874.2U priority Critical patent/CN204084374U/en
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/34Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

Abstract

The utility model discloses a kind of oxygen enrichment flameless gas burner, this burner comprises burner shell, air-distributing disc, precombustion chamber, oxygen spray pipe and fuel nozzle, the furnace wall of heating furnace is provided with the passage through its body of wall, burner shell is installed on the side of passage, space in passage forms precombustion chamber, burner shell is provided with combustion air passage, fuel nozzle is interspersed on burner shell, fuel nozzle is provided with fuel channel, air-distributing disc is provided with air air inlet and fuel inlet, oxygen spray pipe is provided with oxygen channel, on the furnace wall that oxygen spray pipe is installed on heating furnace and oxygen channel be communicated with the burner hearth of heating furnace, oxygen spray pipe is obliquely installed and makes its nozzle end near precombustion chamber on the furnace wall of heating furnace.The oxygen enrichment flameless gas burner that the utility model proposes, organically combines dilute combustion technology and oxygen-enriched combustion technology, realizes flameless combustion in stove, optimizes in-furnace temperature distribution simultaneously, reduces the discharge of NOx.

Description

Oxygen enrichment flameless gas burner
Technical field
The utility model relates to the field of combustion equipment of gaseous fuel, particularly relates to a kind of oxygen enrichment flameless gas burner.
Background technology
Steel industry is major power consumer, is again pollutant emission rich and influential family, improves the resource utilization in steel manufacture process, will reduce the production cost of iron and steel enterprise on the one hand, significant for the discharge of decreasing pollution thing on the other hand.
Face the environment protection emission examination increasing of dynamics and the aggravation of market price competition at present, realizing oxygen-enriched combusting by the oxygen concentration improved in air has become a kind of new combustion mode enjoying favor.Oxygen-enriched combusting has lifting combustion temperature in hearth, reduces fume afterheat loss, and strengthens the advantages such as radiative heat transfer.In addition, this combustion technology significantly can also improve catching fire and combustion characteristics of low calorie fuels.
Oxygen enrichment mode has oxygen lance formula oxygen enrichment and direct blending oxygen enrichment mode, but is at present the direct oxygen enrichment of pipeline substantially in heating furnace field.For traditional burner for heating furnace, if directly air blending oxygen realizes oxygen-enriched combusting, then burn rate can be caused to accelerate, the drop of the flame, combustion zone is more concentrated, along with the lifting of oxygen enriching rate, run in the opposite direction with the thermal regulation of heating furnace on the contrary, run counter to desire, the uniformity that fire box temperature is distributed is deteriorated, the formation of heating power NOx acutely increases, and simultaneously the oxidization burning loss of steel billet and slag amount will increase, be unfavorable for the quality of raising iron and steel production.For so-called oxygen lance formula oxygen enrichment mode, be solve heating efficiency deficiency or improve production capacity angle to set out substantially in heating furnace field, really solve the problems such as the process system caused by oxygen enrichment, temperature uniformity, pollution generation and oxidization burning loss.Therefore develop the fuel of the different calorific value of new burning, the novel oxygen-enriched burner meeting heating furnace thermal regulation that oxygen-rich concentration is adjustable is imperative.
Utility model content
Main purpose of the present utility model is to provide a kind of oxygen enrichment flameless gas burner, under being intended to meet heating process prerequisite, realizes oxygen-enriched combusting by burning tissues optimization, to reach the resultant effect of " promoting heating quality, energy-conservation and reduction of discharging ".
For achieving the above object, the utility model provides a kind of oxygen enrichment flameless gas burner, comprises burner shell, air-distributing disc, precombustion chamber, oxygen spray pipe and fuel nozzle, wherein,
The furnace wall of heating furnace is provided with the passage through its body of wall, burner shell is installed on the side of described passage, space in described passage forms described precombustion chamber, described burner shell is provided with combustion air passage, described air-distributing disc is installed on described burner shell afterbody, described fuel nozzle is interspersed on burner shell, described fuel nozzle is provided with the fuel channel be communicated with described precombustion chamber, described air-distributing disc is provided with the air air inlet with described combustion air path outlet, and with the fuel inlet of described blast tube outlet, combustion-supporting gas and fuel enter described precombustion chamber respectively through after described combustion air passage and fuel channel by described air-distributing disc, described oxygen spray pipe is provided with the oxygen channel for passing into oxygen-enriched air or oxygen in the burner hearth of heating furnace, on the furnace wall that described oxygen spray pipe is installed on heating furnace and described oxygen channel be communicated with the burner hearth of heating furnace, described oxygen spray pipe is obliquely installed and makes its nozzle end near described precombustion chamber on the furnace wall of heating furnace.
Preferably, described oxygen spray pipe is provided with the oxygen spray pipe control valve valve for controlling its inner combustion air current amount, described burner shell is provided with the air intlet valve for controlling its combustion air current amount.
Preferably, described fuel channel is direct current channel, and described air air inlet is eddy flow passage.
Preferably, described air-distributing disc comprises the coaxial interior hub of setting and the swirl vane of outer protective cover and the described interior hub of multiple connection and outer protective cover, described fuel inlet is positioned on described hub, gap often between adjacent two swirl vanes forms the air air inlet being used for passing through for air or oxygen-enriched air, described swirl vane quantity is 4 to 8, and the inclination angle of described swirl vane is 30 to 60 degree.
Preferably, described precombustion chamber is flaring truncated cone-shaped cavity, and the flared end of described precombustion chamber is positioned at its burner hearth side near heating furnace, and the necking end of described precombustion chamber is provided with described air-distributing disc.
Preferably, described oxygen enrichment flameless gas burner also comprises and being installed on the furnace wall of heating furnace, for adjusting the angular adjustment valve of described oxygen spray pipe setting angle, and is coated on the water collar outside described oxygen spray pipe.
Preferably, distance between the shower nozzle of described oxygen spray pipe and the outlet of described precombustion chamber is 200 to 600mm, described oxygen spray pipe is installed on the adjustable angle on the furnace wall of heating furnace, and between the axis of described oxygen spray pipe and the axis of described fuel nozzle, angle is 0 ~ 30 degree.
Preferably, described fuel nozzle, air-distributing disc and precombustion chamber are coaxially arranged.
The oxygen enrichment flameless gas burner that the utility model proposes, has the following advantages:
1) burner structure that the utility model proposes is simple, is easy to realize, and only need arrange 1 oxygen spray pipe 40 on furnace wall.
2) burner of the present utility model both can realize the function of conventional burners completely, can realize again nonflame oxygen enrichment low NOx combustion.
3) the combustion-supporting gas of this torch is not limited to air (in air air inlet) and oxygen (in fuel nozzle), and air air inlet and oxygen channel also can use the oxygen-enriched air of the different oxygen concentrations of blending in advance.
4) this burner is by arranging air air inlet and oxygen spray pipe, thus realizes controlling the independence of air and oxygen, therefore, can adjust catching fire and combustion position in precombustion chamber and burner hearth respectively.When fuel value changes, by the speed of change precombustion chamber wife combustion gas, flow and oxygen concentration, can be improved it and catches fire.In addition, the flow of the combustion-supporting gas of oxygen channel, speed and oxygen concentration can also be changed, to regulate length and the Temperature Distribution of burner hearth flame.
5) when high-temperature stable burns, by regulating the ratio entering air quantity in air air inlet and oxygen spray pipe, even air intlet can be closed, to reduce formation and the fume afterheat loss of NOx to greatest extent.
6) the utility model combines the technology such as swirl flow combustion, fractional combustion, dilute combustion and oxygen-enriched combusting, combustion reaction is distributed to two regions to carry out, and by flue gas dilution reactant, under the prerequisite retaining oxygen-enriched combusting plurality of advantages, achieve low NOx drainage.
7) the utility model reacts most of region of expanding burner hearth to due to combustion chemistry, can improve the uniformity of fire box temperature distribution, be conducive to the homogeneous heating of steel billet, make district of burner hearth localized hyperthermia be inhibited simultaneously, oxidization burning loss is reduced.
Accompanying drawing explanation
Fig. 1 is the sectional structure schematic diagram of the utility model oxygen enrichment flameless gas burner preferred embodiment;
Fig. 2 is the structural representation of the oxygen enrichment flameless gas burner left direction shown in Fig. 1;
Fig. 3 is the theory structure schematic diagram of the utility model oxygen enrichment flameless gas burner preferred embodiment;
Fig. 4 is the structural representation of air-distributing disc in the utility model oxygen enrichment flameless gas burner;
Fig. 5 is structural representation when oxygen spray pipe is installed on furnace wall in the utility model oxygen enrichment flameless gas burner.
In figure: 10-burner shell, 20-air-distributing disc, 30-precombustion chamber, 40-oxygen spray pipe, 50-fuel nozzle, 60-furnace wall, 11-combustion air passage, 21-air air inlet, 22-fuel inlet, hub in 201-, 202-outer protective cover, 203-swirl vane, 41-angular adjustment valve, 42-water collar.
The realization of the utility model object, functional characteristics and advantage will in conjunction with the embodiments, are described further with reference to accompanying drawing.
Detailed description of the invention
Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
It should be noted that, in description of the present utility model, term " transverse direction ", " longitudinal direction ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end ", " interior ", orientation or the position relationship of the instruction such as " outward " are based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, be not indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as restriction of the present utility model.
The utility model proposes a kind of oxygen enrichment flameless gas burner.
See figures.1.and.2, Fig. 1 is the sectional structure schematic diagram of the utility model oxygen enrichment flameless gas burner preferred embodiment; Fig. 2 is the structural representation of the nonflame oxygen rich fuel gas burner left direction shown in Fig. 1.
In this preferred embodiment, oxygen enrichment flameless gas burner comprises burner shell 10, air-distributing disc 20, precombustion chamber 30, oxygen spray pipe 40 and fuel nozzle 50, wherein,
The furnace wall 60 of heating furnace is provided with the passage through its body of wall, burner shell 10 is installed on the side of passage, space in passage forms precombustion chamber 30, burner shell 10 is provided with combustion air passage 11, air-distributing disc 20 is installed on burner shell 10 afterbody, fuel nozzle 40 is interspersed on burner shell 10, fuel nozzle 40 is provided with the fuel channel be communicated with precombustion chamber 40, air-distributing disc 20 is provided with the air air inlet 21 with combustion air path outlet, and with the fuel inlet 22 of described blast tube outlet, combustion-supporting gas and fuel enter precombustion chamber 30 respectively through after combustion air passage and fuel channel by air-distributing disc 20, oxygen spray pipe 40 is provided with the oxygen channel for passing into oxygen-enriched air or oxygen in the burner hearth of heating furnace, on the furnace wall 60 that oxygen spray pipe 40 is installed on heating furnace and oxygen channel be communicated with the burner hearth of heating furnace, oxygen spray pipe 40 is obliquely installed and makes its nozzle end near precombustion chamber 30 on the furnace wall 60 of heating furnace.Oxygen spray pipe 40 is provided with the oxygen spray pipe control valve for controlling its inner combustion air current amount.Burner shell 10 is provided with the air intlet valve for controlling its combustion air current amount.Oxygen spray pipe 40 arranges one.
It should be noted that, combustion-supporting gas is air or oxygen-enriched air.When passing into as oxygen-enriched air in oxygen spray pipe 40, now, in oxygen spray pipe 40, oxygen concentration reduces, but volume flow can increase, and therefore, needs the caliber suitably improving oxygen spray pipe 40.
In the present embodiment, the axis of oxygen spray pipe 40 and the angle of precombustion chamber 30 axis are 0 ~ 30 degree, the setting angle of oxygen spray pipe 40 is controlled like this, the mixture (the combustion-supporting gas that mixture is fuel and enters through air air inlet 21) in the combustion-supporting gas and precombustion chamber 30 of oxygen spray pipe 40 ejection can be made to reach a good admixture, be beneficial to optimize in-furnace temperature and be uniformly distributed.
Further, fuel channel is direct current channel, and air air inlet 21 is eddy flow passage.The air air inlet 21 of eddy flow channel design and the fuel channel of direct current channel with the use of, make this burner when passing into combustion-supporting gas, fuel wrap up by rotary air, its ignition and steady combustion all gets a promotion.
Particularly, in conjunction with reference Fig. 1 and Fig. 4, air-distributing disc 20 comprises the swirl vane 203 of hub 201 and outer protective cover 202 in the coaxial interior hub 201 that arranges and outer protective cover 202 and multiple connection, fuel inlet 22 is positioned on hub 201, gap often between adjacent two swirl vanes 203 forms the air air inlet 21 being used for passing through for air or oxygen-enriched air, swirl vane 203 quantity is 4 to 8, and the inclination angle of swirl vane 203 is 30 to 60 degree.Interior hub 201, outer protective cover 202 and swirl vane 203 are formed in one.Multiple swirl vane 203 is distributed between interior hub 201 and outer protective cover 202 equably.
With reference to Fig. 3, the operation principle of this oxygen enrichment flameless gas burner is as follows:
First, the flow controlling combustion-supporting gas in oxygen spray pipe 40 is zero, air or oxygen-enriched air enter in precombustion chamber 30 through the combustion air passage 21 of burner shell 10 and air air inlet 21 successively, fuel to enter precombustion chamber 30 from the fuel channel of fuel nozzle 50 and lights a fire, and air or oxygen-enriched air and fuel carry out preliminary mixed combustion in precombustion chamber 30;
When the fire box temperature of heating furnace is increased to preset temperature (in the present embodiment, preset temperature is 800 DEG C) time, control oxygen-enriched air or oxygen inject burner hearth (opening oxygen spray pipe control valve) through oxygen spray pipe 40, based on fuel calorific value controls combustion air current amount in oxygen spray pipe 40, composition (number of oxygen content), speed, the relative distance that the setting angle of oxygen spray pipe 40 and itself and precombustion chamber 30 export, the air intlet valve controlled gradually through burner shell 10 is closed simultaneously, until close air intlet valve completely when forming desirable flame, in oxygen spray pipe 40 help fuel gas high-speed to inject time ejector action, interruption-forming low-pressure area is gone out in precombustion chamber 30, entrainment the high-temperature flue gas of burner hearth afterbody and the imperfect combustion high-temperature fuel of precombustion chamber 30 outlet, flue gas dilutes high-temperature fuel and combustion-supporting gas, precombustion chamber 30 exports high-temperature flue gas further mixed combustion by entrainmenting of high-temperature fuel and burner hearth afterbody.
The oxygen enrichment flameless gas burner that the present embodiment proposes has the following advantages:
1) burner structure that the utility model proposes is simple, is easy to realize, and only need arrange 1 oxygen spray pipe 40 on furnace wall 60.
2) burner of the present utility model both can realize the function of conventional burners completely, can realize again nonflame oxygen enrichment low NOx combustion.
3) the combustion-supporting gas of this torch is not limited to air (in air air inlet 21) and oxygen (in fuel nozzle 50), and air air inlet 21 and oxygen channel also can use the oxygen-enriched air of the different oxygen concentrations of blending in advance.
4) this burner is by arranging air air inlet 21 and oxygen spray pipe 40, thus realize controlling the independence of air and oxygen, therefore, precombustion chamber 30(can be adjusted respectively and regulate the flow of air air inlet 21) and burner hearth (regulating the flow of oxygen spray pipe 40) in catch fire and combustion position.When fuel value changes, by changing speed, flow and the oxygen concentration of precombustion chamber 30 wife's combustion gas (air or oxygen-enriched air), can be improved it and catches fire.In addition, flow, speed and the oxygen concentration of the combustion-supporting gas of oxygen channel (oxygen or oxygen-enriched air) can also be changed, to regulate length and the Temperature Distribution of burner hearth flame.
5) when high-temperature stable burns, by regulating the ratio entering air quantity in air air inlet 21 and oxygen spray pipe 40, air intlet (air quantity ratio is 0) can even be closed, to reduce formation and the fume afterheat loss of NOx to greatest extent.
6) the utility model combines the technology such as swirl flow combustion, fractional combustion, dilute combustion and oxygen-enriched combusting, combustion reaction is distributed to two regions to carry out, and by flue gas dilution reactant, under the prerequisite retaining oxygen-enriched combusting plurality of advantages, achieve low NOx drainage.
7) the utility model is owing to expanding most of region of burner hearth to by combustion chemistry reaction, can improve the uniformity of fire box temperature distribution, be conducive to the homogeneous heating of steel billet, make district of burner hearth localized hyperthermia be inhibited simultaneously, oxidization burning loss is reduced.
Further, with reference to Fig. 1, precombustion chamber 30 is flaring truncated cone-shaped cavity, the flared end of precombustion chamber 30 is positioned at its burner hearth side near heating furnace, the necking end of precombustion chamber 30 is provided with air-distributing disc 20, flame advantageously in the homogenous combustion of flame, instead of is concentrated on the nozzle end of fuel nozzle 50 by the precombustion chamber 30 of this structure.
Further, with reference to Fig. 5, this nonflame oxygen rich fuel gas burner also comprises and being installed on the furnace wall 60 of heating furnace, for adjusting the angular adjustment valve 41 of oxygen spray pipe 40 setting angle, and is coated on the water collar 42 outside oxygen spray pipe 40.
By arranging angular adjustment valve 41, thus the convenient setting angle regulating oxygen spray pipe 40, by adjusting the setting angle of oxygen spray pipe 40, to adjust length and the Temperature Distribution of flame, thus make this burner can adapt to different fuel values.Water collar 42 is set, oxidation can be carried out to oxygen spray pipe 40 and stop protection.
The oxygen spray pipe 40 of this burner has larger modulability and good fuel tolerance, by arranging angular adjustment valve 41, the setting angle of oxygen spray pipe 40 can be changed flexibly in the scope of 0 ~ 30 °, thus the Distance geometry position that change oxygen flow mixes with fuel gas stream, thus obtain desirable fire box temperature distributed effect.
Further, the distance between the shower nozzle of oxygen spray pipe 40 and the outlet of precombustion chamber 30 is 200 to 600mm.Now, when can make burning to entrainment effect best, it is effective that the combustion-supporting gas that flue gas sprays high-temperature fuel and oxygen spray pipe 40 dilutes, thus reduce the discharge of NOx further, make fire box temperature evenly.
Further, fuel nozzle 50, air-distributing disc 20 and precombustion chamber 30 are coaxially arranged.Now, reduce the difficulty that burner is installed and keeped in repair on the one hand, be conducive to the symmetrical of flame on the other hand.
These are only preferred embodiment of the present utility model; not thereby the scope of the claims of the present utility model is limited; every equivalent structure transformation utilizing the utility model description and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.

Claims (8)

1. an oxygen enrichment flameless gas burner, is characterized in that, comprises burner shell, air-distributing disc, precombustion chamber, oxygen spray pipe and fuel nozzle, wherein,
The furnace wall of heating furnace is provided with the passage through its body of wall, burner shell is installed on the side of described passage, space in described passage forms described precombustion chamber, described burner shell is provided with combustion air passage, described air-distributing disc is installed on described burner shell afterbody, described fuel nozzle is interspersed on burner shell, described fuel nozzle is provided with the fuel channel be communicated with described precombustion chamber, described air-distributing disc is provided with and the air air inlet of described combustion air path outlet and the fuel inlet with described blast tube outlet, combustion-supporting gas and fuel enter described precombustion chamber respectively through after described combustion air passage and fuel channel by described air-distributing disc, described oxygen spray pipe is provided with the oxygen channel for passing into oxygen-enriched air or oxygen in the burner hearth of heating furnace, on the furnace wall that described oxygen spray pipe is installed on heating furnace and described oxygen channel be communicated with the burner hearth of heating furnace, described oxygen spray pipe is obliquely installed and makes its nozzle end near described precombustion chamber on the furnace wall of heating furnace.
2. oxygen enrichment flameless gas burner as claimed in claim 1, it is characterized in that, described oxygen spray pipe is provided with the oxygen spray pipe control valve for controlling its inner combustion air current amount, described burner shell is provided with the air intlet valve for controlling its combustion air current amount.
3. oxygen enrichment flameless gas burner as claimed in claim 2, it is characterized in that, described fuel channel is direct current channel, and described air air inlet is eddy flow passage.
4. oxygen enrichment flameless gas burner as claimed in claim 3, it is characterized in that, described air-distributing disc comprises the coaxial interior hub of setting and the swirl vane of outer protective cover and the described interior hub of multiple connection and outer protective cover, described fuel inlet is positioned on described hub, gap often between adjacent two swirl vanes forms the air air inlet being used for passing through for air or oxygen-enriched air, described swirl vane quantity is 4 to 8, and the inclination angle of described swirl vane is 30 to 60 degree.
5. oxygen enrichment flameless gas burner as claimed in claim 2, it is characterized in that, described precombustion chamber is flaring truncated cone-shaped cavity, and the flared end of described precombustion chamber is positioned at its burner hearth side near heating furnace, and the necking end of described precombustion chamber is provided with described air-distributing disc.
6. oxygen enrichment flameless gas burner as claimed in claim 2, is characterized in that, also comprise and being installed on the furnace wall of heating furnace, for adjusting the angular adjustment valve of described oxygen spray pipe setting angle, and be coated on the water collar outside described oxygen spray pipe.
7. oxygen enrichment flameless gas burner as claimed in claim 2, it is characterized in that, distance between the shower nozzle of described oxygen spray pipe and the outlet of described precombustion chamber is 200 to 600mm, described oxygen spray pipe is installed on the adjustable angle on the furnace wall of heating furnace, and between the axis of described oxygen spray pipe and the axis of described fuel nozzle, angle is 0 ~ 30 degree.
8. oxygen enrichment flameless gas burner as claimed in any of claims 1 to 7 in one of claims, it is characterized in that, described fuel nozzle, air-distributing disc and precombustion chamber are coaxially arranged.
CN201420579874.2U 2014-10-09 2014-10-09 Oxygen enrichment flameless gas burner Active CN204084374U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104266190A (en) * 2014-10-09 2015-01-07 中冶南方(武汉)威仕工业炉有限公司 Oxygen-enriched and flameless gas burner and control method thereof
CN106524155A (en) * 2016-11-28 2017-03-22 无锡市莱达热工工程有限公司 Low-pressure vortex burner

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104266190A (en) * 2014-10-09 2015-01-07 中冶南方(武汉)威仕工业炉有限公司 Oxygen-enriched and flameless gas burner and control method thereof
CN106524155A (en) * 2016-11-28 2017-03-22 无锡市莱达热工工程有限公司 Low-pressure vortex burner

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Address after: 430223 No. 33 University Park Road, Donghu Development Zone, Wuhan City, Hubei Province

Patentee after: Zhongye South (Wuhan) Thermal Engineering Co., Ltd.

Address before: 430223 No. 33 University Park Road, Donghu Development Zone, Wuhan City, Hubei Province

Patentee before: MCC South (Wuhan) Weishi Thermal Engineering Co., Ltd.

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Address after: 430223 No. 33 University Park Road, Donghu Development Zone, Wuhan City, Hubei Province

Patentee after: MCC South (Wuhan) Weishi Thermal Engineering Co., Ltd.

Address before: 430205 No. 33 University Park Road, Donghu New Technology Development Zone, Wuhan City, Hubei Province

Patentee before: WISDRI (Wuhan) WIS Industrial Furnace Co., Ltd.

CP01 Change in the name or title of a patent holder
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