CN210153801U - Energy-saving environment-friendly combustor with low-load triangular structure - Google Patents
Energy-saving environment-friendly combustor with low-load triangular structure Download PDFInfo
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- CN210153801U CN210153801U CN201920940128.4U CN201920940128U CN210153801U CN 210153801 U CN210153801 U CN 210153801U CN 201920940128 U CN201920940128 U CN 201920940128U CN 210153801 U CN210153801 U CN 210153801U
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Abstract
The utility model relates to an energy-concerving and environment-protective type combustor of underload triangle-shaped structure, including combustor casing, resistant firebrick, changming lamp, combined fuel air gun, steady flame air distributor, air intake adjustment mechanism and observation hole, the combustor casing is the regular triangle structure, distributes one-level fuel air gun and second grade fuel air gun after main fuel gas gets into fuel distributor, and the pilot fuel gas distributes the changming lamp, distributes the main fuel gas of one-level fuel air gun and distributes the pilot fuel gas of changming lamp from the hole blowout of nai firebrick. The utility model can adapt to smaller space and more rigorous installation requirements; air layering and fuel grading can ensure that the low-load combustor has better heating quality in a space unit of the heating furnace, uniform temperature field distribution, balanced heating and small oxidation burning loss, thereby achieving the requirements of better, more effective energy conservation and low nitrogen oxide emission.
Description
Technical Field
The utility model relates to an industrial burner technical field, concretely relates to energy-concerving and environment-protective type combustor of low-load triangle-shaped structure is applicable to compact structure, the less industrial furnace of operation operating mode load.
Background
Estimated in the early 80 s, nitrogen oxides emitted into the atmosphere due to human activities are about 5300 million tons worldwide each year. The nitrogen oxides have a great damaging effect on the environment, and are one of the main substances for forming acid rain, the important substances for forming photochemical smog in the atmosphere and an important factor for consuming O3.
GB31570-2015 'emission Standard for Industrial pollutants for Petroleum refining' implemented in the state 2015 from 7/1 th provides that the emission limit of nitrogen oxides in flue gas of the existing enterprise process heating furnace is not more than 150mg/m3 from 2017, from 7/1 th. In order to reduce the nitrogen oxides in the flue gas of the process heating furnace, China petrochemical enterprises require that the emission limit value of the nitrogen oxides in the flue gas is not more than 80mg/m 3. In order to meet the national environmental protection emission requirements, low-nitrogen oxide type burners have been widely used.
In general, low nox type burners mainly use techniques such as fuel classification and flue gas recirculation to achieve the purpose of dividing flame, weakening combustion, and lowering flame temperature to suppress the generation of nox. Because the low nitrogen oxide combustor mainly realizes low nitrogen oxide emission by weakened combustion, the temperature and the speed of flame are reduced, the length of the flame is lengthened, a hearth is dark, the ratio of radiation heat transfer intensity and convection heat transfer in a radiation chamber is reduced, and the difference of a temperature field of the radiation chamber is increased, compared with the traditional combustor, the consumption of fuel is increased by 5% -10% under the same working condition. Therefore, the technology of the low-nitrogen oxide burner needs to be improved, the temperature field distribution of the heating furnace radiation chamber is improved on the basis of reaching the environmental protection standard, the heating furnace thermal efficiency is improved, and the environmental protection and energy conservation standards are achieved.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects and provide an energy-saving and environment-friendly burner with a low-load triangular structure, wherein a shell is in a regular triangular structure, can adapt to a smaller space and meet more severe installation requirements; air layering and fuel grading can ensure that the low-load combustor has better heating quality in a space unit of the heating furnace, uniform temperature field distribution, balanced heating and small oxidation burning loss, thereby achieving the requirements of better, more effective energy conservation and low nitrogen oxide emission.
The purpose of the utility model is realized like this:
the utility model provides an energy-concerving and environment-protective type combustor of low-load triangle-shaped structure, includes combustor casing, firebrick, pilot burner, combined fuel gas rifle, steady flame air distributor, air intake adjustment mechanism and sight hole, the combustor casing is the regular triangle-shaped structure, the firebrick is located the top of combustor casing, the firebrick is equipped with the hole, combined fuel gas rifle includes one-level fuel gas rifle and second grade fuel gas rifle, fuel gas divides main fuel gas and vice fuel gas, and main fuel gas distributes one-level fuel gas rifle and second grade fuel gas rifle after getting into fuel distributor, and vice fuel gas distributes the pilot burner to the pilot burner, and the main fuel gas that distributes the one-level fuel gas rifle and the vice fuel gas who distributes the pilot burner spout from the hole of firebrick.
Preferably, the refractory brick is of a conical structure and is provided with a plurality of air diversion holes.
Preferably, the refractory bricks have a taper angle of 50-80 °.
Preferably, the flame stabilizing air distributor is arranged at the throat part of the refractory brick, and the flame stabilizing air distributor is fixedly arranged at the top of the burner shell.
Preferably, the primary fuel air gun and the secondary fuel air gun are both provided with a plurality of fuel staged combustion, the load proportion of the primary fuel air gun is 10-20%, and the load proportion of the secondary fuel air gun is 80-90%.
Preferably, the flame-stabilizing air distributor is positioned in the middle of the plurality of primary fuel air guns.
Preferably, the number of the primary fuel air guns is 5, and the number of the secondary fuel air guns is 3.
Preferably, 3 secondary fuel gas guns are correspondingly arranged at three vertexes of the burner shell, and the gun ports extend out of the burner shell.
Preferably, the air inlet adjusting mechanism is arranged at the lower part of the combustor shell, the air inlet adjusting mechanism is divided into an upper layer and a lower layer, and each layer is provided with an air adjusting handle.
The utility model has the advantages that:
compared with the existing burner structure, the utility model discloses the characteristics of combustor lie in:
1. the structure is special: the combustor shell is in a regular triangle structure, so that the combustor is more compact in structure and can normally work and operate under the conditions of smaller space and more strict installation requirements;
2. low load: the fuel gas gun structure is divided into a first level and a second level, and the holes are distributed in proportion. The benefit of designing the burner in this way is: the heating quality in the space unit of the heating furnace is good, the temperature field distribution is uniform, the heating is balanced, and the oxidation burning loss is small;
3. energy conservation and environmental protection: in order to meet the requirement of low NOx emission, the combustor is structurally characterized in that:
(1) fuel classification: the fuel spray gun is of a multi-gun structure, and fuel proportion is distributed by a first-level spray gun and a second-level spray gun, wherein the load proportion of the first-level spray gun accounts for 10% -20%, and the load proportion of the second-level spray gun accounts for 80% -90%;
(2) air classification: the air inlet adjusting mechanism is divided into an upper layer and a lower layer, air is distributed in a layered mode (the upper layer accounts for 65% and the lower layer accounts for 35%), and an air adjusting handle is designed on each layer, so that air can be flexibly distributed to the combustor according to different working conditions to adjust the combustor to the optimal combustion state so as to improve the heat efficiency and achieve the good energy-saving effect;
(3) flue gas circulation: the special structure (conical boss and multiple air guide holes) of the firebrick of the burner utilizes the high-strength fuel injection speed of the burner and the flue gas backflow characteristic in the hearth to ensure that part of flue gas passes through the guide holes of the firebrick to realize the flue gas recirculation in the combustion process of the burner, and finally achieves the effect of low-nitrogen emission.
Drawings
Fig. 1 is a cross-sectional view of a low-load energy-saving environment-friendly burner of the present invention.
Fig. 2 is a general assembly diagram of the low-load energy-saving environment-friendly burner of the present invention.
Fig. 3 is a top view of fig. 2.
Fig. 4 is a structural view of a combination type fuel gas gun.
Fig. 5 is a top view of fig. 4.
Wherein: a refractory brick 1; a flame stabilizing air distributor 2; a combined fuel gas gun 3; a primary fuel air gun 3.1; a secondary fuel gas gun 3.2; a pilot lamp 4; an air inlet adjusting mechanism 5; a fire observation hole 6; a wind adjusting handle 7; a burner housing 8; a fuel distributor 9.
Detailed Description
Referring to fig. 1-5, the utility model relates to an energy-saving environment-friendly burner with a low-load triangle structure, which comprises a burner shell 8, a firebrick 1, a pilot burner 4, a combined fuel air gun 3, a flame-stabilizing air distributor 2, an air inlet adjusting mechanism 5 and a fire observation hole 6, the flame observation hole 6 is convenient for observing flame, the burner shell 8 is in a regular triangle structure, the firebrick 1 is positioned above the burner shell 8, the firebrick 1 is provided with an inner hole, the combined fuel air gun 3 comprises a primary fuel air gun 3.1 and a secondary fuel air gun 3.2, the fuel gas is divided into primary fuel gas and secondary fuel gas, the primary fuel gas enters the fuel distributor 9 and then is distributed to the primary fuel gas gun 3.1 and the secondary fuel gas gun 3.2, the secondary fuel gas is distributed to the pilot burner 4, and the primary fuel gas distributed to the primary fuel gas gun 3.1 and the secondary fuel gas distributed to the pilot burner 4 are sprayed out from the inner hole of the firebrick 1.
The firebrick 1 is of a conical structure and is provided with a plurality of air diversion holes.
The taper angle of the refractory brick 1 is 50-80 degrees.
The flame stabilizing air distributor 2 is arranged at the throat part of the refractory brick 1, the flame stabilizing air distributor 2 is fixedly arranged at the top of the combustor shell 8, and the fixing mode is realized through bolt connection or welding.
The primary fuel air guns 3.1 and the secondary fuel air guns 3.2 are multiple in number, fuel is combusted in a grading mode, the load proportion of the primary fuel air guns 3.1 accounts for 10-20%, and the load proportion of the secondary fuel air guns 3.2 accounts for 80-90%.
The flame-stabilizing air distributor 2 is positioned in the middle of a plurality of primary fuel air guns 3.1.
The one-level fuel air gun 3.1 is equipped with 5, and second grade fuel air gun 3.2 is equipped with 3.
3 two grade fuel air guns 3.2 correspond and set up at 8 three summits of combustor casing, and the muzzle stretches out combustor casing 8.
The air inlet adjusting mechanism 5 is arranged at the lower part of the combustor shell 8, the air inlet adjusting mechanism 5 is divided into an upper layer and a lower layer, and each layer is provided with an air adjusting handle 7. The air inlet quantity of the air inlet adjusting mechanism 5 is divided into 65 percent of the upper layer and 35 percent of the lower layer, and the accuracy of the air adjusting handle 7 can reach 2.5 degrees (a 36-tooth closed angle is accurately carved).
The working principle is as follows:
the primary fuel gas first enters the fuel distributor 2 and is distributed to the primary fuel lances 3.1 and the secondary fuel lances 3.2. Combustion-supporting air enters the flame-stabilizing air distributor 2 through the air duct, and fuel is sprayed out through the main fuel spray gun-combined fuel air gun 3 and is mixed and combusted with the combustion-supporting air passing through the flame-stabilizing air distributor 2.
The air quantity distributed by the flame stabilizing air distributor 2 influences the comprehensive strength of a flow field and the size of a reflux area, so that the mixing uniformity of fuel and air is changed, and the NOx emission is influenced finally. The outlet of the flame stabilizing air distributor is close to the fuel nozzle, and the air flow field flow generates strong mixing action on the fuel, so that the fuel and the air are uniformly mixed, and the local high temperature is eliminated. The main fuel zone has a high gas flow velocity and a short residence time of the fuel in the high temperature zone, both of which contribute to the lowest NOx emissions.
In the high-energy combustion chamber of the combustor where the flame main body is located, the mixed gas obtains the strongest vortex state, and therefore the combustion efficiency is greatly improved. The aerodynamic design can enable the mixed gas to form strong turbulent mixing, and the turbulent mixing state can enable the flame to be kept stable, so that the flame can be rapidly combusted in a high-energy combustion chamber of the combustor. The high-speed flame is sprayed out through a nozzle brick of the combustion chamber, but a fuel grading supply combustion technology is adopted outside the high-energy combustion chamber, the fuel is sprayed out from a secondary fuel spray gun, namely a pilot burner to directly irradiate the main flame, the low-temperature fuel reduces the temperature of the main flame and dilutes oxygen, so that the flame is in a lean oxygen state to destroy the generation condition of NOx.
When the flame body is sprayed out of the high-energy combustion chamber, high-speed airflow is generated, forced flue gas circulation is generated in the heating furnace, NOx in the flue gas is decomposed, the central temperature of the flame is reduced, and generation of NOx is inhibited. The flame is sprayed into the radiation chamber of the heating furnace at a high speed, a negative pressure field is formed in a certain range at a nozzle to pull the smoke of the radiation chamber to flow back, and strong smoke circulation and mechanical disturbance are formed in the radiation chamber. Through the high-speed backflow of the flue gas in the radiation chamber, the temperature of the hearth tends to be uniform from top to bottom, the heat intensity of the low-heat-intensity area of the furnace tube is improved, the heat intensity of the high-heat-intensity area is reduced, the heat intensity uniformity of the furnace tube is improved through a balanced temperature field, the heat transfer to the heated medium in the furnace tube is effectively improved, the flue gas temperature of the hearth outlet is reduced, and the heat efficiency of the heating furnace is improved.
In addition to the above embodiments, the present invention also includes other embodiments, and all technical solutions formed by equivalent transformation or equivalent replacement should fall within the protection scope of the claims of the present invention.
Claims (9)
1. The utility model provides an energy-concerving and environment-protective type combustor of low-load triangle-shaped structure which characterized in that: comprises a burner shell (8), refractory bricks (1), a pilot burner (4), a combined fuel air gun (3), a flame stabilizing air distributor (2), an air inlet adjusting mechanism (5) and a sighting hole (6), the burner shell (8) is in a regular triangle structure, the refractory bricks (1) are positioned above the burner shell (8), the firebrick (1) is provided with an inner hole, the combined fuel air gun (3) comprises a primary fuel air gun (3.1) and a secondary fuel air gun (3.2), the fuel gas is divided into a primary fuel gas and a secondary fuel gas, the primary fuel gas enters the fuel distributor (9) and then is distributed to the primary fuel gas gun (3.1) and the secondary fuel gas gun (3.2), the secondary fuel gas is distributed to the pilot burner (4), and the primary fuel gas distributed to the primary fuel gas gun (3.1) and the secondary fuel gas distributed to the pilot burner (4) are sprayed out from an inner hole of the refractory brick (1).
2. The energy-saving and environment-friendly burner with the low-load triangular structure as claimed in claim 1, wherein: the refractory brick (1) is of a conical structure and is provided with a plurality of air diversion holes.
3. The energy-saving and environment-friendly burner with the low-load triangular structure as claimed in claim 2, wherein: the taper angle of the refractory brick (1) is 50-80 degrees.
4. The energy-saving and environment-friendly burner with the low-load triangular structure as claimed in claim 1, wherein: the flame stabilizing air distributor (2) is arranged at the throat part of the refractory brick (1), and the flame stabilizing air distributor (2) is fixedly arranged at the top of the burner shell (8).
5. The energy-saving and environment-friendly burner with the low-load triangular structure as claimed in claim 1, wherein: the primary fuel air gun (3.1) and the secondary fuel air gun (3.2) are both provided with a plurality of fuel staged combustion, the load proportion of the primary fuel air gun (3.1) accounts for 10-20%, and the load proportion of the secondary fuel air gun (3.2) accounts for 80-90%.
6. The energy-saving and environment-friendly burner with the low-load triangular structure as claimed in claim 5, wherein: the flame stabilizing air distributor (2) is positioned in the middle of the primary fuel air guns (3.1).
7. The energy-saving and environment-friendly burner with the low-load triangular structure as claimed in claim 5, wherein: the number of the first-stage fuel air guns (3.1) is 5, and the number of the second-stage fuel air guns (3.2) is 3.
8. The energy-saving and environment-friendly burner with the low-load triangular structure as claimed in claim 7, wherein: the 3 secondary fuel air guns (3.2) are correspondingly arranged at three top points of the burner shell (8), and the gun openings extend out of the burner shell (8).
9. The energy-saving and environment-friendly burner with the low-load triangular structure as claimed in claim 1, wherein: the air inlet adjusting mechanism (5) is arranged at the lower part of the combustor shell (8), the air inlet adjusting mechanism (5) is divided into an upper layer and a lower layer, and each layer is provided with an air adjusting handle (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920940128.4U CN210153801U (en) | 2019-06-21 | 2019-06-21 | Energy-saving environment-friendly combustor with low-load triangular structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920940128.4U CN210153801U (en) | 2019-06-21 | 2019-06-21 | Energy-saving environment-friendly combustor with low-load triangular structure |
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| Publication Number | Publication Date |
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| CN210153801U true CN210153801U (en) | 2020-03-17 |
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| CN201920940128.4U Active CN210153801U (en) | 2019-06-21 | 2019-06-21 | Energy-saving environment-friendly combustor with low-load triangular structure |
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| CN (1) | CN210153801U (en) |
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Denomination of utility model: Energy saving and environmental protection burner with low load triangle structure Effective date of registration: 20220928 Granted publication date: 20200317 Pledgee: Jiangsu Jiangyin Rural Commercial Bank Co.,Ltd. Xinqiao sub branch Pledgor: JIANGSU YANXIN SCI-TECH Co.,Ltd. Registration number: Y2022320010556 |