CN201964395U - Multi-burner heating furnace - Google Patents
Multi-burner heating furnace Download PDFInfo
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- CN201964395U CN201964395U CN2010206695355U CN201020669535U CN201964395U CN 201964395 U CN201964395 U CN 201964395U CN 2010206695355 U CN2010206695355 U CN 2010206695355U CN 201020669535 U CN201020669535 U CN 201020669535U CN 201964395 U CN201964395 U CN 201964395U
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Abstract
The utility model relates to a multi-burner heating furnace comprising a heating furnace, natural gas burners which are arranged at the bottom of the heating furnace and uniformly distributed on at least three circumferences, and a multi-nozzle semi-premixing type gas burner arranged at the center of the bottom of the heating furnace, wherein the multi-nozzle semi-premixing type gas burner comprises a main gas pipe communicated with a gas pipeline, branch gas pipes communicated with the main gas pipe, ejecting pipes communicated with an air pipeline, nozzles arranged at the heads of the branch gas pipes, and flame stabilizing covers arranged at the peripheries of the nozzles, the number of the branch gas pipes is consistent with the number of the natural gas burners, the number of the ejecting pipes is consistent with the number of the branch gas pipes, the branch gas pipes are evenly distributed around the main gas pipe, the ejecting pipes are arranged at the side walls of the corresponding branch gas pipes, the flame stabilizing covers are provided with a plurality of air holes, and the nozzles of the branch gas pipes are positioned between the nozzles of two natural gas burners adjacent to the nozzles of the branch gas pipes. The multi-burner heating furnace can increase the temperature of a hearth at a radiation section of the bottom, reduce the temperature of the hearth and flue gas temperature at a convection section of the upper part, and improve the thermal efficiency of the heating furnace.
Description
Technical field
The utility model relates to a kind of gas-fired heater, relates in particular to the heating furnace of a kind of use in petrochemical industry.
Background technology
The heating furnace of chemical industry adopts usually at the furnace bottom circumference uniform distribution 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, one of them main cause is exactly a radiant section temperature field irrational distribution, 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 by strengthening furnace bottom burner gas quantity; improve thermal efficiency of heating furnace; but because the original burner in bottom all adopts with boiler tube and becomes parallel flame heat form; under the certain situation of burner structure; 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.
The utility model content
Technical problems such as the purpose of this utility model provides a kind of multi-combustor heating furnace, and it solves existing heating furnace radiant section temperature field irrational distribution, and exhaust gas temperature is higher, and thermal efficiency of heating furnace is on the low side.
Technical solution of the present utility model is:
A kind of multi-combustor heating furnace comprises heating furnace, is arranged on the neat gas burner of at least three circumference uniform distributions at the bottom of the heating-furnace, and its special character is: also comprise a multiinjector half premixed gas burner that is arranged on center at the bottom of the heating-furnace; Described multiinjector half premixed gas burner comprises the main combustible pipe 1 that communicates with gas pipeline, communicate with main combustible pipe and a Gas Pipe 2 that quantity is consistent with neat gas burner, communicate with air duct and quantity and prop up the Gas Pipe unanimity induction tunnel 3, be arranged on the nozzle 5 that props up Gas Pipe 2 heads, the stable flame cover 4 that is arranged on nozzle 5 peripheries; Described Gas Pipe 2 is evenly distributed on around the main combustible pipe; Described induction tunnel 3 is opened on the sidewall of a corresponding Gas Pipe 2; Described stable flame cover 4 is provided with a plurality of pores 6; The nozzle of described Gas Pipe is between the nozzle of two adjacent with it neat gas burners.
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 utility model:
1, the utility model is installed in center at the bottom of the heating-furnace with multiinjector half premixed gas burner, can reach and improve bottom radiant section furnace bore temperature, reduces upper convection section fire box temperature and exhaust gas temperature, improves thermal efficiency of heating furnace.
2, as shown in Figure 3, during the utility model is installed in multiinjector half pre-mixing type combustion apapratus 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 the ejection of this novel burner are distributed between former burner flame, 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 radiant section temperature field simultaneously and distribute to safety in production.
3, thereby whether the corner dimension of the Gas Pipe axis of multiinjector half pre-mixing type combustion apapratus of the utility model heating furnace and the main combustible pipe axis flame that is directly connected to the ejection of this burner can be licked and lick the heating furnace wall and cause safety in production hidden danger, determines that a plurality of Gas Pipe axis become 10～30 ° of angles with the main combustible pipe axis direction so the utility model passes through meticulous calculating, simulation, test.
4, the utility model 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 utility model 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 effect of secondary wind, strengthened air and fuel mix, the overheavy firing effect makes flame rigidity strong.
Description of drawings
Fig. 1 is the front view of the multiinjector half premixed gas burner of the utility model heating furnace;
Fig. 2 is the vertical view of Fig. 1;
Fig. 3 is the flame schematic diagram of the utility model heating furnace;
Fig. 4 is the structural representation of the utility model heating furnace;
Wherein: the 1-main combustible pipe, 2-props up Gas Pipe, 3-induction tunnel, 4-stable flame cover, the 5-nozzle, the 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
As shown in Fig. 1,2, the utility model comprises heating furnace, be arranged on neat gas burner and the multiinjector half premixed gas burner of three circumference uniform distributions at the bottom of the heating-furnace, and multiinjector half premixed gas burner comprises 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 have been opened on the stable flame cover 4, play the effect of secondary wind, enhanced fuel gas combustion effect makes flame rigidity strong.
The utility model is as follows in the effect of certain chemical enterprise ammonia shop test:
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.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) sees Table 1.
Table 1 exhaust gas constituents
| Component | H 2 | CH 4 | N 2 | NH 3 | Ar etc. |
| V％ | 29 | 18 | 40 | 10 | 3 |
After using the utility model heating furnace, short and just advanced effectively from the flame of multiinjector half premixed gas burner nozzle ejection, the fuel natural gas use amount has been saved 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 ℃.
Gas heating furnace operational factor contrast (6 monthly average values) saw Table 2 before and after novel heating furnace used.
Gas heating furnace operational factor contrast before and after table 2 uses
As can be seen from Table 2, improve the temperature flow field distribution after using this novel heating furnace, 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 ℃, illustrate 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. multi-combustor heating furnace comprises heating furnace, is arranged on the neat gas burner of at least three circumference uniform distributions at the bottom of the heating-furnace, it is characterized in that: also comprise a multiinjector half premixed gas burner that is arranged on center at the bottom of the heating-furnace; Described multiinjector half premixed gas burner comprises the main combustible pipe (1) that communicates with gas pipeline, communicate with main combustible pipe and a Gas Pipe (2) that quantity is consistent with neat gas burner, communicate with air duct and quantity and prop up the Gas Pipe unanimity induction tunnel (3), be arranged on the nozzle (5) that props up Gas Pipe (2) head, be arranged on the peripheral stable flame cover (4) of nozzle (5); Described Gas Pipe (2) is evenly distributed on around the main combustible pipe; Described induction tunnel (3) is opened on the sidewall of a corresponding Gas Pipe (2); Described stable flame cover (4) is provided with a plurality of pores (6); The nozzle of described Gas Pipe is between the nozzle of two adjacent with it neat gas burners.
2. multi-combustor heating furnace according to claim 1 is characterized in that: the axis of described Gas Pipe (2) and main combustible pipe (1) axis angle a are 10～30 °.
3. multi-combustor heating furnace according to claim 1 and 2 is characterized in that: the pore (6) of described stable flame cover (4) is oval pore, and its quantity is 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206695355U CN201964395U (en) | 2010-12-20 | 2010-12-20 | Multi-burner heating furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206695355U CN201964395U (en) | 2010-12-20 | 2010-12-20 | Multi-burner heating furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201964395U true CN201964395U (en) | 2011-09-07 |
Family
ID=44526936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206695355U Expired - Fee Related CN201964395U (en) | 2010-12-20 | 2010-12-20 | Multi-burner heating furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201964395U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102563621A (en) * | 2010-12-20 | 2012-07-11 | 西安航天远征流体控制股份有限公司 | Heating furnace with multiple burners |
| CN106556149A (en) * | 2015-09-29 | 2017-04-05 | 中国石化扬子石油化工有限公司 | Multiple branch circuit multi-burner heating furnace branch balance control method and system |
| CN111492179A (en) * | 2017-12-21 | 2020-08-04 | Bsh家用电器有限公司 | Injector device for a gas burner of a household appliance, gas burner and household appliance |
-
2010
- 2010-12-20 CN CN2010206695355U patent/CN201964395U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102563621A (en) * | 2010-12-20 | 2012-07-11 | 西安航天远征流体控制股份有限公司 | Heating furnace with multiple burners |
| CN106556149A (en) * | 2015-09-29 | 2017-04-05 | 中国石化扬子石油化工有限公司 | Multiple branch circuit multi-burner heating furnace branch balance control method and system |
| CN111492179A (en) * | 2017-12-21 | 2020-08-04 | Bsh家用电器有限公司 | Injector device for a gas burner of a household appliance, gas burner and household appliance |
| CN111492179B (en) * | 2017-12-21 | 2023-08-29 | Bsh家用电器有限公司 | Injector device for a gas burner of a household appliance, gas burner and household appliance |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110907 Termination date: 20131220 |