CN102537961A - Multi-nozzle semi-premixed gas burner - Google Patents
Multi-nozzle semi-premixed gas burner Download PDFInfo
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- CN102537961A CN102537961A CN2010105969687A CN201010596968A CN102537961A CN 102537961 A CN102537961 A CN 102537961A CN 2010105969687 A CN2010105969687 A CN 2010105969687A CN 201010596968 A CN201010596968 A CN 201010596968A CN 102537961 A CN102537961 A CN 102537961A
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Abstract
The invention relates to a multi-nozzle semi-premixed gas burner, which comprises a main gas pipe 1, at least three branch gas pipes 2, injection pipes 3, nozzles 5 and flame stabilizing covers 4. The main gas pipe 1 is communicated with a gas pipeline, the branch gas pipes 2 are communicated with the main gas pipe, the injection pipes 3 are communicated with an air pipeline, the number of the injection pipes 3 is consistent with that of the branch gas pipes, the nozzles 5 are arranged at the heads of the branch gas pipes 2, the flame stabilizing covers 4 are arranged on the peripheries of the nozzles 5 respectively, the branch gas pipes 2 are evenly distributed on the periphery of the main gas pipe, openings of the injection pipes 3 are arranged on side walls of the corresponding branch gas pipes 2, and a plurality of air holes 6 are arranged on each flame stabilizing cover 4. The multi-nozzle semi-premixed gas burner is mounted at the center of the bottom of a heating furnace, the temperature of a hearth in a radiation section of the bottom of the heating furnace can be increased, the temperature and the exhaust temperature of the hearth in an upper convection section are reduced, the heat efficiency of the heating furnace is improved, waste gas is used, energy is saved, emission is reduced, reasonable length of flame jetted by the burner is ensured, and burning effect is enhanced so that the flame is rigid and powerful.
Description
Technical field
The present invention relates to a kind of combustion gas (waste gas) burner, relate in particular to a kind of gas burner that use at the center at the bottom of the heating-furnace of petrochemical industry.
Background technology
The heating furnace of chemical industry is employed in the furnace bottom circumference uniform distribution usually and uses three (many) burner ejections to become the flame heat mode of parallel direction with boiler tube; It is on the low side bottom radiant section temperature often to occur; The upper convection section temperature drift; Simultaneously exhaust gas temperature exceeds phenomenons such as thermal efficiency of heating furnace such as design load is inclined to one side, and one of them main cause is exactly a radiant section temperature field irrational distribution, and most of heat does not concentrate on the bottom radiation heat transfer; And gone to top heat convection district heat exchange, cause thermal efficiency of heating furnace low.
Usually chemical enterprise is want to increase the bottom to radiation heat transfer through strengthening furnace bottom burner gas quantity; Improve thermal efficiency of heating furnace, but become parallel flame heat form, under the certain situation of burner structure owing to the original burner in bottom all adopts with boiler tube; Gas quantity increases; The length of flame of burner ejection is elongated, causes the convection section temperature drift, even burns out heat exchanger tube hook etc. and be unfavorable for the phenomenon of keeping the safety in production.
It is not enough bottom radiant section furnace bore temperature to occur in the normal use of former heating furnace; Upper convection section fire box temperature and exhaust gas temperature are higher; Increase the burner thermic load of original three furnace bottom circumference uniform distributions, can not improve the convection section fire box temperature, convection section fire box temperature and exhaust gas temperature continue to increase on the contrary.
On the other hand, the self-produced again a lot of technology waste gas of chemical enterprise itself contain a lot of combustible components (as: H2, CO, CH4 etc.) and all carry out the processing of emptying simply in the waste gas, cause the waste of resource and the pollution of environment.
Summary of the invention
The purpose of this invention is to provide a kind of multiinjector half premixed gas burner; It both can be the waste gas of original self-produced emptying as effective fuel; Can solve existing heating furnace radiant section temperature field irrational distribution again, technical problem such as exhaust gas temperature is higher, and thermal efficiency of heating furnace is on the low side.
Technical solution of the present invention is:
A kind of multiinjector half premixed gas burner, its special character is: comprise the main combustible pipe 1 that communicates with gas pipeline, at least three Gas Pipe 2 that communicate with main combustible pipe, communicate with air duct and induction tunnel 3 that quantity is consistent with propping up Gas Pipe, be arranged on the nozzle 5 that props up Gas Pipe 2 heads, be arranged on the peripheral stable flame cover 4 of nozzle 5; Said Gas Pipe 2 is evenly distributed on around the main combustible pipe; Said induction tunnel 3 is opened on the sidewall of a corresponding Gas Pipe 2; Said stable flame cover 4 is provided with a plurality of pores 6.
The axis of above-mentioned Gas Pipe 2 and main combustible pipe 1 axis angle a are 10～30 °.
The pore 6 of above-mentioned stable flame cover 4 is oval pore, and its quantity is 12.
Advantage of the present invention:
1, is installed in center at the bottom of the heating-furnace, can reaches and improve bottom radiant section furnace bore temperature, reduce upper convection section fire box temperature and exhaust gas temperature, improve thermal efficiency of heating furnace, reach the purpose of exhaust gas utilization energy-saving and emission-reduction simultaneously.
2, as shown in Figure 3; During this novel burner is installed at the bottom of the heating-furnace in the heart; And the nozzle direction of Gas Pipe will be at the flame of former heating furnace burner ejection between the two; Three strands of flames that guarantee this novel burner ejection are distributed between former burner flame, can avoid two bursts of flames stacks to cause the length of flame and direction to change licking to lick heating furnace tube like this and bring hidden danger to safety in production, can improve the distribution of radiant section temperature field simultaneously.
Thereby whether the corner dimension that 3, props up Gas Pipe axis and main combustible pipe axis is directly connected to the flame of this burner ejection and can licks and lick the heating furnace wall and cause safety in production hidden danger, so the present invention confirms that through meticulous calculating, simulation, test a plurality of Gas Pipe axis become 10～30 ° of angles with the main combustible pipe axis direction.
4, the present invention is provided with induction tunnel, and portion of air as wind and combustion gas (waste gas) premix, is reached and reduces length of flame purpose, guarantees that the length of flame of this novel burner ejection is reasonable.
5, each Gas Pipe of the present invention all is equipped with induction tunnel, connects nozzle in a Gas Pipe end, between nozzle and the induction tunnel stable flame cover is set; Open 12 oval pores on the stable flame cover, played the secondary wind effect, strengthened air and fuel mix; The overheavy firing effect makes flame rigidity strong.
Description of drawings
Fig. 1 is a front view of the present invention;
Fig. 2 is the vertical view of Fig. 1;
Fig. 3 is the flame sketch map of the present invention in heating furnace;
Fig. 4 is the position view of the present invention in heating furnace;
Wherein: the 1-main combustible pipe, 2-props up Gas Pipe, the 3-induction tunnel; The 4-stable flame cover, 5-nozzle, 6-pore; 7-heating furnace radiant section flame retardant coating, 8-neat gas burner flame, 9-multiinjector half pre-mixing type combustion apapratus flame; At the bottom of the 10-heating-furnace, 11-multiinjector half pre-mixing type combustion apapratus, 12-neat gas burner.
The specific embodiment
Like Fig. 1, shown in 2, the present invention includes a main combustible pipe 1, three Gas Pipe 2, three induction tunnels 3, three stable flame covers 4, three nozzles 5.Prop up 2 one-tenth 120 ° of circumference uniform distributions of Gas Pipe on main combustible pipe 1, its axis becomes 10-30 ° of angle with main combustible pipe 1 axis direction.Each Gas Pipe 2 is equipped with induction tunnel 3, connects nozzle 5 in Gas Pipe 2 end, between nozzle 5 and the induction tunnel 3 stable flame cover 4 is set; 12 oval pores 6 have been opened on the stable flame cover 4; Play the secondary wind effect, enhanced fuel gas combustion effect makes flame rigidity strong.
The effect that the present invention tests on certain two gas heating furnace in chemical enterprise ammonia workshop is following:
This heating furnace is the atmospheric pressure kiln of tubular type heating, total high 22.27m of stove, the high 7.73m of bottom radiant section, internal diameter 2.66m, the high 4.03m of middle part convection section, internal diameter 1.9m, the high 10.51m of top smoke evacuation tube, internal diameter 1.0m.The burner of three fuel natural gas of circumference uniform distribution at the bottom of the heating-furnace is nature induced air type diffusion combustion mode.Natural gas from compressor is introduced into the preheating of gas heating furnace radiant section, advances the desulfurization of manganese oxide desulfurizer then, sends into convection section again and continues to be warmed up to 480 ± 5 ℃, sends into primary reformer after satisfying the requirement of natural gas steam reforming temperature process.Exhaust gas temperature to occur higher for heating furnace when ordinary production, and heated gas medium advances that the primary reformer temperature is on the low side not to meet the technology requirement, and thermal efficiency of heating furnace is low.
The waste gas major parameter that this enterprise's ammonia synthesis process produces is: total flow 2000-3000Nm
3/ h is pressure 0.8MPa to novel burner nozzle preceding pipeline, and temperature is lower than 35 ℃, and waste gas main component (average) is seen table 1.
Table 1 exhaust gas constituents
| Component | H 2 | CH 4 | N 2 | NH 3 | Ar etc. |
| V％ | 29 | 18 | 40 | 10 | 3 |
Use when of the present invention; During this novel burner is installed at the bottom of the heating-furnace in the heart; And the shower nozzle direction of Gas Pipe will be at the flame of former heating furnace burner ejection between the two; Three strands of flames that guarantee the ejection of this novel burner are distributed between former burner flame, and the included angle B in the accompanying drawing 3 is a Gas Pipe axis and a main combustible pipe axis direction angle a.Can avoid the stack of two strands of flames to cause the length of flame and direction to change licking to lick heating furnace tube like this and bring hidden danger, can improve the distribution of radiant section temperature field simultaneously to safety in production.Short and just advanced effectively from the flame of burner nozzle ejection, the fuel natural gas use amount has been practiced thrift 280Nm
3/ h, exhaust gas temperature have descended about 60 ℃, and having satisfied gas medium simultaneously, to advance the primary reformer temperature be 480 ± 5 ℃.
Table 2 was seen in gas heating furnace operational factor contrast (6 monthly average values) before and after novel burner used.
Gas heating furnace operational factor contrast before and after table 2 uses
From table 2, can find out, use this novel burner after the gas heating furnace operating condition improve:
1, practiced thrift fuel natural gas, remarkable in economical benefits helps environmental protection simultaneously
The fuel natural gas use amount has on average been practiced thrift 280Nm
3/ h has not only practiced thrift natural gas but also effectively utilize the technology waste gas of original emptying in vain economic benefit, obvious environment benefit.
2, improve the temperature flow field distribution, improved the gas heating furnace thermal efficiency
After the use, because the variation of flame distribution, the temperature field of having improved radiant section distributes, and has strengthened the heat exchange effect of convection section, has improved the thermal efficiency of heating furnace.Use the back natural gas to go the desulfurizer temperature-averaging to reduce by 20 ℃, on average improve 10 ℃, explain that furnace temp flow field, use back is more reasonable, improved the radiant section Temperature Distribution and advance the primary reformer temperature.The chimney meatus transmitting smoke temperature descends 60 ℃ simultaneously, and the burner hearth central temperature reduces by 40 ℃, and heating furnace radiant section and convection section heat exchange are more reasonable, and thermal efficiency of heating furnace obviously improves.
Claims (3)
1. a multiinjector half premixed gas burner is characterized in that: comprise the main combustible pipe that communicates with gas pipeline, at least three Gas Pipe that communicate with main combustible pipe, communicate with air duct and quantity and prop up the consistent induction tunnel of Gas Pipe, be arranged on the nozzle that props up the Gas Pipe head, the stable flame cover that is arranged on nozzle periphery; Said Gas Pipe is evenly distributed on around the main combustible pipe; Said induction tunnel is opened on the sidewall of a corresponding Gas Pipe; Said stable flame cover is provided with a plurality of pores.
2. multiinjector according to claim 1 half premixed gas burner, it is characterized in that: the axis of said Gas Pipe and main combustible pipe axis angle a are 10～30 °.
3. multiinjector according to claim 1 and 2 half premixed gas burner, it is characterized in that: the pore of said stable flame cover is oval pore, its quantity is 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105969687A CN102537961A (en) | 2010-12-20 | 2010-12-20 | Multi-nozzle semi-premixed gas burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105969687A CN102537961A (en) | 2010-12-20 | 2010-12-20 | Multi-nozzle semi-premixed gas burner |
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| Publication Number | Publication Date |
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| CN102537961A true CN102537961A (en) | 2012-07-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010105969687A Pending CN102537961A (en) | 2010-12-20 | 2010-12-20 | Multi-nozzle semi-premixed gas burner |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108730975A (en) * | 2017-04-24 | 2018-11-02 | 上海诺特飞博燃烧设备有限公司 | Diffusion type all-premixing burner |
| CN110848680A (en) * | 2019-10-11 | 2020-02-28 | 广东绿壳新能源有限公司 | Semi-premixed natural gas pipe type combustor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5275552A (en) * | 1992-03-27 | 1994-01-04 | John Zink Company, A Division Of Koch Engineering Co. Inc. | Low NOx gas burner apparatus and methods |
| CN2482634Y (en) * | 2001-08-15 | 2002-03-20 | 湖南吉祥燃烧器股份有限公司 | Low No x double-side flat flame environment protection energy-saving efficient gas-firing burner |
| JP2006275334A (en) * | 2005-03-28 | 2006-10-12 | Osaka Gas Co Ltd | Combustion device for heating furnace |
| CN101694297A (en) * | 2009-10-23 | 2010-04-14 | 洛阳瑞昌石油化工设备有限公司 | Forced-draft burner and method for regularizing side-combustion high-temperature preheated air of square-box furnace |
| CN201964415U (en) * | 2010-12-20 | 2011-09-07 | 西安航天远征流体控制股份有限公司 | Multinozzle semi-premixed gas burner |
-
2010
- 2010-12-20 CN CN2010105969687A patent/CN102537961A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5275552A (en) * | 1992-03-27 | 1994-01-04 | John Zink Company, A Division Of Koch Engineering Co. Inc. | Low NOx gas burner apparatus and methods |
| CN2482634Y (en) * | 2001-08-15 | 2002-03-20 | 湖南吉祥燃烧器股份有限公司 | Low No x double-side flat flame environment protection energy-saving efficient gas-firing burner |
| JP2006275334A (en) * | 2005-03-28 | 2006-10-12 | Osaka Gas Co Ltd | Combustion device for heating furnace |
| CN101694297A (en) * | 2009-10-23 | 2010-04-14 | 洛阳瑞昌石油化工设备有限公司 | Forced-draft burner and method for regularizing side-combustion high-temperature preheated air of square-box furnace |
| CN201964415U (en) * | 2010-12-20 | 2011-09-07 | 西安航天远征流体控制股份有限公司 | Multinozzle semi-premixed gas burner |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108730975A (en) * | 2017-04-24 | 2018-11-02 | 上海诺特飞博燃烧设备有限公司 | Diffusion type all-premixing burner |
| CN110848680A (en) * | 2019-10-11 | 2020-02-28 | 广东绿壳新能源有限公司 | Semi-premixed natural gas pipe type combustor |
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Application publication date: 20120704 |