CN202884924U - Ground torch premixing type burner - Google Patents
Ground torch premixing type burner Download PDFInfo
- Publication number
- CN202884924U CN202884924U CN 201220544797 CN201220544797U CN202884924U CN 202884924 U CN202884924 U CN 202884924U CN 201220544797 CN201220544797 CN 201220544797 CN 201220544797 U CN201220544797 U CN 201220544797U CN 202884924 U CN202884924 U CN 202884924U
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- pipe
- type burner
- premixed
- ground flare
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Abstract
A ground torch premixing type burner comprises a gas transmission header pipe (2). The ground torch premixing type burner is characterized in that the gas transmission header pipe (2) is connected with at least two lower gas distribution branch pipes (3) and at least two upper gas distribution branch pipes (4), the gas outlet of each lower gas distribution branch pipe (3) is provided with a spraying mouth (15) provided with a premixing chamber (5), and each premixing chamber (5) is composed of a gradually-retracting gas inlet pipe (6) and a cylinder pipe. The larger end of each gradually-retracting gas inlet pipe (6) is covered on each spraying mouth (15), the small end of each gradually-retracting gas inlet pipe (6) is communicated with the lower end of each cylinder pipe, the upper end of each cylinder pipe is a premixed gas outlet (7), and an igniter (9) is arranged on the periphery of each premixed gas outlet (7). The gas outlet end of each upper gas distribution branch pipe (4) is communicated with an annular pipe (8) provided with a spraying hole (9), the outlet end of the gas transmission header pipe (2) is provided with a top annular pipe (13) communicated with a steam conveying pipe (12), and the top annular pipe (13) is provided with a steam spraying mouth (14) increasing air mixing performance and fume removing performance. The ground torch premixing type burner can improve a premixing rate and burning efficiency.
Description
Technical field
The utility model relates to a kind of petrochemical equipment, especially a kind of torch gas burner, specifically a kind of ground flare premixed type burner.
Background technology
At present, petrochemical plant and oil refining apparatus are processed a large amount of hydrocarbons, when normal production and accident, all to discharge inevitably the inflammable and explosive material of a great deal of, in order to prevent that fire and explosion accident from occuring, assurance equipment and personal safety must arrange flare system and process the flammable and explosive substance that gives off.Flare system collects pipe network by torch gas and torch assembly forms.In general, each torch branch manifold enters the torch gas house steward, by house steward torch gas is delivered to torch outside the battery limit (BL).
The Main Function of torch is that the unnecessary flammable explosive gas that gives off under the normal condition of production of device is disposed in safe transport and burning; The flammable explosive gas of output when treating apparatus test run, driving, parking; Because causing, accident can't continue to produce or the part flow process must be with the fuel gas dump in whole flow process or the capital equipment to flare system and pass into non-flammable gases to guarantee the person and the safety of installing when interrupting.
In many application scenarios, because the requirement of environmental protection around the torch location needs to produce shorter flame front and can burn and processes the fuel of large flow.Therefore the advantage of ground flare just be preset time fuel waste gas the treating capacity excursion larger.Multistage burner has been used in variation and realization smokeless combustion in order to adapt to exhaust gas volume in the flare system simultaneously.Flowing by the control system guiding of every grade of burner can be supplied to the enough pressure of each burner in this way, entrainments enough air and fully mixes with exhaust combustion gases guaranteeing, to guarantee smokeless combustion in range of application.
Ground flare is often referred to the sealing torch, but also comprises open multi-combustor torch, mainly selects according to the accident amount of releasing.The former is mainly used in the less chemical plant of the amount of releasing, and the latter is mainly used in the large ethene of the amount of releasing and Natural Gas Projects.The ground flare building block also has obturator and fuel manifold except having all burners of general torch, lighter and device for igniting thereof and flame detector, sealing device, knockout drum, flammable explosive gas detector, fluid-tight, pipeline, flue dust to eliminate control system, the radiation-protection equipment.Ground flare is as a kind of very effective closed burned waste gas system, have to around the heat radiation of diffusion less, maintenance is convenient, reduce to greatest extent air pollution, light pollution and noise pollution and the few characteristics of floor space to surrounding environment.Burner in the ground flare system needs enough compactnesses to arrange to reduce the overall dimensions of the enclosure wall of system and encirclement, hinders Air Flow and causes flame to be assembled thereby can not be too near to each other simultaneously.Exhaust gas flow must be limited in the scope that flame is no more than the enclosure wall height in addition.System also comprises the single ignition device that is positioned at every row's burner end.
There is the problem that easy over-emitting black exhaust, assist gas consumption are large, pass flame reliability deficiency in current ground flare burner,
The ground flare burner of current use mainly contains two types, and a kind of is to comprise that a plurality of divergent nozzles are used for distributing exhaust combustion gases and entrainment the required air of burning; Another kind is premixed type burner (with reference to the disclosed premix burner of U.S. Patent Application No. US540362, calling patent 1 in the following text).Latter's exhaust combustion gases sprays into premixing cavity by nozzle, entrainmented the part air and carry out therein premix with waste gas before entering premixing cavity, and mist sprays into the atmosphere from the premixing cavity top and burns, and continues to entrainment auxiliary air and finish combustion process.
The central compact district that comprises fuel in the whole flame front that the former produces, this zone keep stable until the outside of this flame front takes fire.Along with the external firing of flame front, air just can enter the flame front interior zone and finish combustion process.The shortcoming of this form is because the interaction of each fuel jet, increases or smolders in the situation that do not cause the length of flame, is difficult to increase the exhaust-gas treatment amount.Usually need to increase ground flare enclosure wall height and increase the length of flame, this can significantly increase construction cost.
The latter's characteristics are effectively to increase the exhaust-gas treatment amount, and have some superiority when processing heavy hydrocarbon or unsaturated gas.On the whole, the premixed type mix flare burner is compared the diffused mix flare burner, owing to being pre-mixed the part air, has the potentiality of low cigarette, low flame.
Patent 1 provides a kind of form of premixed type mix flare burner, and its actual premix treating capacity only has 15% to 50% of the total treating capacity of waste gas, can only play the effect of partly-premixed burning; Discharged the gas condition restriction, when premix primary air partly is not enough, because it is higher that the gas flow of peripheral diffusion combustion accounts for total treating capacity ratio, the smoke distribution that forms after the burning in around to cause the interior zone auxiliary air to suck difficult, affect on the contrary combustion efficiency.
Summary of the invention
The purpose of this utility model is undesirable for existing ground premixed type torch gas burner premixing effect and then affects the problem of combustion efficiency, designing a kind of premix ratio can be up to 50-95%, and primary air ratio is the ground flare premixed type burner of 15-125%.
The technical solution of the utility model is:
A kind of ground flare premixed type burner, it comprises gas transmission main 2, it is characterized in that described gas transmission main 1 is connected with at least two lower distribution arms 3 and at least two upper distribution arms 4; On the gas outlet of described each lower distribution arm 3 nozzle 15 is installed all, be equipped with on the nozzle 15 torch gas is mixed with air so that clean-burning premixer 5, described premixer 5 is comprised of convergent air inlet pipe 6 and cylindrical tube, the large end shield of convergent air inlet pipe 6 is contained on the nozzle 15, the small end of convergent air inlet pipe 6 is connected with the lower end of cylindrical tube, the upper end of cylindrical tube is premixed gas outlet 7, around the premixed gas outlet 7 igniter 11 is installed; The outlet side of described upper distribution arm 4 is connected with endless tube 8 with diffusion combustion, and endless tube 8 is provided with diffusion combustion spray orifice 9; The port of export at described gas transmission main 2 is equipped with top collar 13, and top collar 13 is connected with steam appendix 12, and being provided with to play in top collar 13 increases the steam jet 14 that air mixes and improve the smoke elimination performance.
Described premixer 5 links to each other with gas transmission main 2 by gripper shoe 10 or links to each other with lower distribution arm 3 by triangular support bracket 28.
In the premixed gas outlet 7 of 5 upper ends, described premixer fire-collection ring 48 is installed.
Described nozzle 15 is cross-shaped nozzles, is provided with spray orifice 47 in the upper end 46 of four arms 45 of cross-shaped nozzles, and spray orifice 47 is connected with lower distribution arm 3 by the inner passage.
Described endless tube 8 is fixed on the upper end of each premixer 5 or the outside that envelope is fixed on all premixers 5.
Described lower distribution arm 3 horizontally connects with the junction of gas transmission main 2 or tilts to be connected.
Described lower distribution arm 3 is the 30-60 degree with the angle of inclination that gas transmission main 2 tilts to be connected.
The angle of described spray orifice 9 axial lines and horizontal plane is the 0-90 degree.
The utility model can be used for processing the combustible exhaust gas in the various scopes.Pre-mixing nozzle is used for waste gas spraying into premixing cavity at a high speed, and entrainments quantitative air from the external world mix with it in this process; Premixing cavity comprises bottom inlet, top exit and sidewall, and the air and waste gas import is located at the bottom, and mixed gas vent is located at the top, and the top also can be established steady flame groove and be played retention flame effect in addition.The waste gas of doing diffusion combustion enters in the top annular pipe through pipe branch, and from spray orifice high speed ejection burning, this a part of flame plays with the biography flame effect of contiguous burner also can play steady flame effect simultaneously.Pipeline is used for the gas that waste gas header transports is divided into four Main Branches, and each branch continues to be divided into two secondary branch and does respectively premixed and diffusion combustion.Supporting construction is mainly used in supporting premixing cavity and gas endless tube, can comprise oblique support and horizontal support.The steam accessory system is positioned at the inboard of four premixing cavitys, and annular spread in the situation that the center lack of air can play booster action, improves combustion efficiency.The bottom of the utility model premixing cavity can include the convergent ejection structure, strengthens the ability of entrainmenting air.Premix discharging gas can adopt the injection premix form of single injector, profile jet rose and Condar structure.Main split's number can be 3,4,5,6 even more, but because considering for treating capacity, combustion efficiency and cost.The exhausted air quantity of spurting into premixing cavity in the utility model accounts in the 50%-95% scope of exhaust-gas treatment total amount, sprays into premixed gas and can effectively reduce flame height, can reduce accordingly the strong height of flare tower simultaneously to reduce manufacturing cost.The utility model comprises take the ground flare of this burner as the basis, strong and waste gas, steam supply pipe road around the tower of torch.Arrangement of burner comprises laterally, vertical, cross star or square.
The beneficial effects of the utility model:
Compare the premix ratio 5% ~ 50% of patent 1, premix ratio of the present utility model is up to 50 ~ 95%, and diffusion combustion mainly plays steady flame and passes the flame effect all around, has reduced black smoke and smoke screen that the diffusion flame burning produces.
In the reality, patent 1 preferred 125% ~ 300% primary air ratio needs very high discharging atmospheric pressure and equipment size cost, lacks practicality at low pressure ground flare exhaust system.And under lower primary air ratio, patent 1 burner is lost its described performance characteristic, i.e. low, the burning black smoke few feature of flame height.The primary air ratio that the utility model adapts to is wider, and 15% ~ 125%, owing to not needing too high primary air ratio, therefore be fit to wider blowdown presssure condition (when particularly pressure is low) and discharging gas kind.
The utility model adopts special bull burning form, having improved the flame periphery contacts with air outside the intensity of mixing, flame zone is concentrated at each flame formation center that attracts each other, when primary air is not enough, center endless tube steam sprays and entrainments auxiliary air, directly acts on the inside that flame is concentrated at the center, namely forms respectively the auxiliary air mixed interface in inside and the periphery of total flame, improve combustion efficiency, remedy the problem of primary air deficiency with this.Do not affect simultaneously steady flame and pass flame effect.
The utility model is owing to adopting the bull assembling form, except the secondary contact area that improves flame and air, pass flame design by the design of rational burner dimensions and diffusion combustion, strengthened biography flame between the burner and the biography flame between every cover burner, thereby improved the reliability of burner.Special bull assembling and steady flame pass the flame design, adapt to realize reliably steady flame and pass flame under multiple ambient wind impact.
Description of drawings
Fig. 1 is one of structural representation of the present utility model.
Fig. 2 is the top view of Fig. 1.
Fig. 3 is the schematic diagram of Fig. 1.
Fig. 4 is two of structural representation of the present utility model.
Fig. 5 is the fundamental diagram of Fig. 4.
Fig. 6 is three of structural representation of the present utility model.
Fig. 7 is the fundamental diagram of Fig. 6.
Fig. 8 is the structural representation of cross-shaped nozzles of the present utility model.
Fig. 9 is nozzle operation state top view shown in Figure 8.
Figure 10 is the structural representation that fire-collection ring is installed in the premixed device cylindrical tube of the present utility model.
Figure 11 is the top view of Figure 10.
Figure 12 is four of structural representation of the present utility model.
Figure 13 is five of structural representation of the present utility model.
Figure 14 is six of structural representation of the present utility model.
The specific embodiment
Below in conjunction with drawings and Examples the utility model is further described.
Embodiment one.
Shown in Fig. 1-3,8-11.
A kind of ground flare premixed type burner, it comprises gas transmission main 2, described gas transmission main 2 is connected with at least two lower distribution arms 3 and at least two upper distribution arms 4, waste gas enters in the pipeline and is divided into two parts, a part enters pre-mixing nozzle through lower distribution arm 3, entrainments to carry out premixed combustion after the part air enters the premixing cavity mixing; Another part directly enters gas transmission main 2 top annular nozzles through upper distribution arm and does diffusion combustion.On the gas outlet of described each lower distribution arm 3 nozzle 15(Fig. 2 is installed all), nozzle 15 can adopt plain nozzle during implementation, also can adopt the cross-shaped nozzles shown in Fig. 8,9, upper end 46 at four arms 45 of cross-shaped nozzles is provided with spray orifice 47, and spray orifice 47 is connected with lower distribution arm 3 by the inner passage.Be equipped with on the nozzle 15 torch gas is mixed with air so that clean-burning premixer 5, premixer 5 links to each other with gas transmission main 2 by gripper shoe 10, described premixer 5 is comprised of convergent air inlet pipe 6 and cylindrical tube, the large end shield of convergent air inlet pipe 6 is contained on the nozzle 15, the small end of convergent air inlet pipe 6 is connected with the lower end of cylindrical tube, the upper end of cylindrical tube is premixed gas outlet 7, around the premixed gas outlet 7 igniter 11 is installed, in the premixed gas outlet 7 of 5 upper ends, premixer the fire-collection ring 48(that increases combustion efficiency is installed and sees Figure 10,11); The outlet side of described upper distribution arm 4 is connected with endless tube 8 with diffusion combustion, and endless tube 8 is provided with diffusion combustion spray orifice 9, and the angle of described spray orifice 9 axial lines and horizontal plane is the 0-90 degree; The port of export at described gas transmission main 2 is equipped with top collar 13, and top collar 13 is connected with steam appendix 12, and being provided with to play in top collar 13 increases the steam jet 14 that air mixes and improve the smoke elimination performance, as shown in Figure 1.
The operation principle of the present embodiment as shown in Figure 3, waste exhaust gases enters the entrance 16 of gas transmission main 2 from upstream line, then be assigned in distribution arm 3 and 4 by entrance 17 and 18, part gas sprays in the premixer 5 by are connected the nozzle 15 that connects with arm, entrainmenting a certain amount of air and waste gas in this process from atmosphere together enters the premixer 5 from entrance 20, outlet 21 ejections by 5 tops, premixer after this fully mixes are burnt, and this part gas accounts for the 50-95% of exhaust-gas treatment total amount usually.The discharging gas of 5%-50% enters in the ring pipe 8 by distribution arm 4 in addition, then directly carries out diffusion combustion by outlet 22 ejections of spray orifice 9, and this part gas can play steady flame and pass the effect of flame, therefore can not ignore.Steam can play by outlet 23 nozzles of steam jet 14 and strengthen the effect that air mixes and improve the smoke elimination performance when treating capacity is larger.24 is that the side wall surface, 25,26 of gas transmission main is the side wall surface of premixer for the side wall surface of distribution arm, 27.
Embodiment two.
Shown in Fig. 4-5.
The difference of the present embodiment and embodiment one is the fixed form of premixer 5, embodiment one links to each other with gas transmission main 2 by a gripper shoe 10, the premixer of the present embodiment then links to each other (Fig. 4) with lower distribution arm 3 by triangular support bracket 28, and the schematic diagram of the burner that matches with Fig. 4 as shown in Figure 5.
Embodiment three.
Shown in Fig. 6-7.
The present embodiment and embodiment one, two difference are that lower distribution arm 3 is changed into the tilting lower gas-distribution pipe 32,33 that tilts to be connected with the connected mode of gas transmission main 2 by level connection joint, angle of inclination among Fig. 6 is 45 degree, can be designed to as required other angle during implementation, such as 30 degree, 60 degree etc.The schematic diagram of Fig. 6 equivalence as shown in Figure 7.
Embodiment four.
As shown in figure 12.
The present embodiment and embodiment one, two, three difference are the forms of described endless tube 8, among the embodiment one to three, endless tube 8 is fixed on each premixed upper end, and being envelope, the endless tube of the present embodiment is fixed on the large endless tube 50 in the outside of all premixers 5, which is provided with the spray orifice 51 identical with spray orifice 9, as shown in figure 12,5 equivalences of the upper distribution arm among Figure 12 become the gas-distribution pipe 49 of inclination installation.
Embodiment five.
As shown in figure 13.
The difference of the present embodiment and embodiment one to four is that the quantity of premixer 5 is three.
Embodiment six.
As shown in figure 14.。
The difference of embodiment and embodiment one to five is that the quantity of premixer 5 is six.
The mix flare burner of the present embodiment one to six can be formed ground flare, and ground flare also should comprise around the body of wall of mix flare burner extension, the fuel supply lines that is used for supplying fuel to mix flare burner, altar lamp etc.
The utility model does not relate to partly all, and the prior art that maybe can adopt same as the prior art is realized.
Claims (8)
1. ground flare premixed type burner, it comprises gas transmission main (2), it is characterized in that described gas transmission main (2) is connected with at least two lower distribution arms (3) and at least two upper distribution arms (4); On the gas outlet of described each lower distribution arm (3) nozzle (15) is installed all, be equipped with on the nozzle (15) torch gas is mixed with air so that clean-burning premixer (5), described premixer (5) is comprised of convergent air inlet pipe (6) and cylindrical tube, the large end shield of convergent air inlet pipe (6) is contained on the nozzle (15), the small end of convergent air inlet pipe (6) is connected with the lower end of cylindrical tube, the upper end of cylindrical tube is premixed gas outlet (7), and igniter (11) is installed around the premixed gas outlet (7); The outlet side of described upper distribution arm (4) is connected with endless tube (8) with diffusion combustion, and endless tube (8) is provided with diffusion combustion spray orifice (9); The port of export at described gas transmission main (2) is equipped with top collar (13), top collar (13) is connected with steam appendix (12), and being provided with to play in top collar (13) increases the steam jet (14) that air mixes and improve the smoke elimination performance.
2. ground flare premixed type burner according to claim 1 is characterized in that described premixer (5) links to each other with gas transmission main (2) by gripper shoe (10) or links to each other with lower distribution arm (3) by triangular support bracket (28).
3. ground flare premixed type burner according to claim 1 is characterized in that in the premixed gas outlet (7) of upper end, described premixer (5) fire-collection ring (48) being installed.
4. ground flare premixed type burner according to claim 1, it is characterized in that described nozzle (15) is cross-shaped nozzles, upper end (46) at four arms (45) of cross-shaped nozzles is provided with spray orifice (47), and spray orifice (47) is connected with lower distribution arm (3) by the inner passage.
5. ground flare premixed type burner according to claim 1 is characterized in that described endless tube (8) is fixed on the upper end of each premixer (5) or the outside that envelope is fixed on all premixers (5).
6. described ground flare premixed type burner according to claim 1 is characterized in that described lower distribution arm (3) horizontally connects with the junction of gas transmission main (2) or tilts to be connected.
7. described ground flare premixed type burner according to claim 6 is characterized in that described lower distribution arm (3) is the 30-60 degree with the angle of inclination that gas transmission main (2) tilts to be connected.
8. described ground flare premixed type burner according to claim 1, the angle that it is characterized in that described spray orifice (9) axial line and horizontal plane is the 0-90 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220544797 CN202884924U (en) | 2012-10-23 | 2012-10-23 | Ground torch premixing type burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220544797 CN202884924U (en) | 2012-10-23 | 2012-10-23 | Ground torch premixing type burner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202884924U true CN202884924U (en) | 2013-04-17 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220544797 Withdrawn - After Issue CN202884924U (en) | 2012-10-23 | 2012-10-23 | Ground torch premixing type burner |
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| CN (1) | CN202884924U (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102901098A (en) * | 2012-10-23 | 2013-01-30 | 江苏中圣高科技产业有限公司 | Multi-head efficient pre-mixing type combustion system of ground flare |
| CN107036097A (en) * | 2017-04-19 | 2017-08-11 | 中国科学院工程热物理研究所 | A kind of nozzle, nozzle array and burner |
| CN107036089A (en) * | 2017-04-19 | 2017-08-11 | 中国科学院工程热物理研究所 | A kind of nozzle and burner of multiple dimensioned swirling flow atomizing |
| US9816705B2 (en) | 2014-11-18 | 2017-11-14 | Honeywell International Inc. | Flare burner for a combustible gas |
| CN109579003A (en) * | 2018-11-09 | 2019-04-05 | 鞍钢股份有限公司 | A kind of low NOx neat gas burner of combined internal combustion type low temperature and combustion method |
| CN109579004A (en) * | 2018-11-09 | 2019-04-05 | 鞍钢股份有限公司 | A kind of low NOx natural gas burning system of low temperature and combustion method |
| CN110440249A (en) * | 2019-07-29 | 2019-11-12 | 华帝股份有限公司 | Burner assembly for holy fire plate |
| US10598375B2 (en) | 2016-11-01 | 2020-03-24 | Honeywell International Inc. | Asymmetrical and offset flare tip for flare burners |
| CN111578283A (en) * | 2020-05-06 | 2020-08-25 | 郑州博纳热能设备有限公司 | Natural gas burner with low nitrogen oxide emission |
-
2012
- 2012-10-23 CN CN 201220544797 patent/CN202884924U/en not_active Withdrawn - After Issue
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102901098B (en) * | 2012-10-23 | 2015-10-07 | 江苏中圣高科技产业有限公司 | Ground flare multi-head high-efficiency premixed type combustion system |
| CN102901098A (en) * | 2012-10-23 | 2013-01-30 | 江苏中圣高科技产业有限公司 | Multi-head efficient pre-mixing type combustion system of ground flare |
| US9816705B2 (en) | 2014-11-18 | 2017-11-14 | Honeywell International Inc. | Flare burner for a combustible gas |
| US10598375B2 (en) | 2016-11-01 | 2020-03-24 | Honeywell International Inc. | Asymmetrical and offset flare tip for flare burners |
| US11105508B2 (en) | 2016-11-01 | 2021-08-31 | Honeywell International Inc. | Asymmetrical and offset flare tip for flare burners |
| CN107036089A (en) * | 2017-04-19 | 2017-08-11 | 中国科学院工程热物理研究所 | A kind of nozzle and burner of multiple dimensioned swirling flow atomizing |
| CN107036089B (en) * | 2017-04-19 | 2019-02-01 | 中国科学院工程热物理研究所 | A kind of nozzle and burner of multiple dimensioned swirling flow atomizing |
| CN107036097B (en) * | 2017-04-19 | 2021-06-08 | 中国科学院工程热物理研究所 | Nozzle, nozzle array and combustor |
| CN107036097A (en) * | 2017-04-19 | 2017-08-11 | 中国科学院工程热物理研究所 | A kind of nozzle, nozzle array and burner |
| CN109579003A (en) * | 2018-11-09 | 2019-04-05 | 鞍钢股份有限公司 | A kind of low NOx neat gas burner of combined internal combustion type low temperature and combustion method |
| CN109579004A (en) * | 2018-11-09 | 2019-04-05 | 鞍钢股份有限公司 | A kind of low NOx natural gas burning system of low temperature and combustion method |
| CN109579004B (en) * | 2018-11-09 | 2020-06-23 | 鞍钢股份有限公司 | Low-temperature low-NOx natural gas combustion system and combustion method |
| CN110440249A (en) * | 2019-07-29 | 2019-11-12 | 华帝股份有限公司 | Burner assembly for holy fire plate |
| CN111578283A (en) * | 2020-05-06 | 2020-08-25 | 郑州博纳热能设备有限公司 | Natural gas burner with low nitrogen oxide emission |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130417 Effective date of abandoning: 20151007 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |