CN217763421U

CN217763421U - L-shaped coke oven gas low-nitrogen combustor

Info

Publication number: CN217763421U
Application number: CN202221862085.0U
Authority: CN
Inventors: 王鸿川; 李亚运; 王修训; 杨铭和; 王德义
Original assignee: Beijing Shenkebosi Thermal Energy Engineering Technology Co ltd
Current assignee: Beijing Shenkebosi Thermal Energy Engineering Technology Co ltd
Priority date: 2022-07-19
Filing date: 2022-07-19
Publication date: 2022-11-08
Anticipated expiration: 2032-07-19

Abstract

The utility model relates to an L-shaped coke oven gas low-nitrogen burner in the field of burners, which comprises a primary channel, wherein the primary channel comprises an air inlet section and an air outlet section which are arranged in an L shape, the air inlet section is provided with a base which is used for being fixed with a pipeline, a secondary channel is erected in the primary channel, the tail end of the secondary channel is provided with a fuel through hole for discharging gas, and the base is provided with an ignition device which is used for igniting mixed gas at the tail end of the primary channel; the ignition device comprises an ignition rod connected with the base in a sliding mode, an ignition gun connected to the tail end of the ignition rod, and a propeller driving the ignition rod to drive the ignition gun to stretch into the primary channel to ignite the mixed gas or drive the ignition rod to drive the ignition gun to be far away from the tail end of the primary channel. The burner enhances the mixing effect of the coke oven gas in the burner, ensures the burnout effect of the coke oven gas in the L-shaped primary channel, effectively controls the generation of a local high-temperature area, and reduces the discharge amount of NOx and CO.

Description

L-shaped coke oven gas low-nitrogen combustor

Technical Field

The application relates to the field of burners, in particular to an L-shaped coke oven gas low-nitrogen burner.

Background

At present, combustion equipment mainly faces two major challenges, namely, the emission of CO and NOx in flue gas after combustion of the combustor is required to be gradually reduced, and the combustor is required to be capable of adapting to field operation working conditions more widely and meeting the requirements of energy conservation and high efficiency.

Receive combustor installation environment requirement, many combustors need be the L type and install inside the pipeline, and L type coke oven gas combustor before the improvement generally can set up the air supply port in the outside of installation pipeline, and ignition sets up in the middle part of combustor to be located inside the pipeline simultaneously, if ignition goes wrong, the staff need with the whole pipeline of separating of combustor, just can maintain the ignition of combustor inside, and the operation is complicated, difficult maintenance.

In view of the above-mentioned related art, the inventors have recognized that the development of an L-type coke oven gas burner has a disadvantage of difficulty in maintenance.

Disclosure of Invention

Aiming at the defects existing in the prior art, the utility model aims at providing an L-shaped coke oven gas low-nitrogen burner, which has the advantage of improving the maintenance efficiency of an ignition device.

The application provides an L type coke oven gas low-nitrogen combustor adopts following technical scheme:

an L-shaped coke oven gas low-nitrogen burner comprises a primary channel for introducing combustion-supporting air, wherein the primary channel comprises an air inlet section and an air outlet section which are arranged in an L shape, a base used for being fixed with a pipeline is arranged on the air inlet section, a secondary channel for introducing gas is erected in the primary channel, the tail end of the secondary channel extends to the tail end of the primary channel, a fuel through hole used for discharging the gas is arranged at the tail end of the secondary channel, and an ignition device used for igniting mixed gas at the tail end of the primary channel is arranged on the base;

the ignition device comprises an ignition rod connected with the base in a sliding mode, an ignition gun connected to the tail end of the ignition rod, and a propeller driving the ignition rod to drive the ignition gun to stretch into the primary channel to ignite the mixed gas or drive the ignition rod to drive the ignition gun to be far away from the tail end of the primary channel.

Through adopting above-mentioned technical scheme, when the staff igniteed the combustor, the accessible control propeller drives the displacement of ignition pole, thereby the ignition position of adjustment ignition gun, make the combustor ignition success rate higher, and after the combustor is igniteed and is accomplished, drive the section of giving vent to anger that the ignition gun withdrawed from the primary channel through the propeller, thereby coke oven gas has been strengthened at the inside mixed effect of nozzle, the burn-off effect of coke oven gas in the inside of L type primary channel has been guaranteed, and effective control local high-temperature region's production, NOx and CO's emission has been reduced. And the propeller is located the pipeline outside, and the displacement of control ignition pole that can be timely is convenient for install and maintain ignition, has improved ignition's maintenance efficiency greatly.

Preferably, the propeller comprises a propeller main body and a driving pipe which is positioned in the propeller main body and is driven by gas to slide relative to the propeller main body, the ignition rod is fixed relative to the driving pipe, and an opening for accommodating the ignition rod to penetrate out is arranged at the bottom of the propeller main body.

Through adopting above-mentioned technical scheme, the driving piece is the tubulose on the one hand, can hold the ignition bar and improve the fixed stability of ignition bar, and the ignition bar makes propeller occupation space little with running through the propeller setting moreover, is convenient for install and maintain.

Preferably, the primary channel and the secondary channel are both circular-section pipelines, and the first channel and the secondary channel are coaxially arranged.

Through adopting above-mentioned technical scheme, primary channel and secondary channel are circular passageway and coaxial setting together, when letting in gas for each regional gas flow is more even, and at primary channel end, coal gas and air mixing are abundant more and even.

Preferably, the section of giving vent to anger is internal to seal and is fixed with a whirl flame stabilization dish, whirl flame stabilization dish is worn out to the end of secondary channel to seal fixedly with whirl flame stabilization dish, the end of secondary channel sets up for sealing, the fuel through-hole is evenly seted up in the week side of secondary channel, whirl flame stabilization dish is located the week side of secondary channel and evenly has seted up a mixing orifice.

By adopting the technical scheme, the swirl flame stabilizing disc has a fixing effect on the tail ends of the primary channel and the secondary channel on the one hand, so that gas is more stable in the process that the gas in the primary channel flows from the tail ends, and further the flame is more stable; in the second aspect, the tail end of the secondary channel is arranged in a sealing way, so that the flow speed of the coal gas is limited, the coal gas can pass through the fuel through hole more uniformly, and the mixing efficiency of the coal gas and the combustion-supporting gas is improved because the flow direction of the coal gas is on the stroke of the combustion-supporting gas passing through the primary mixing hole.

Preferably, the swirl flame stabilizing disc is uniformly provided with secondary mixing holes at the periphery of the primary mixing hole, and one side of each secondary mixing hole at the air outlet is fixed with an obliquely arranged guide vane, and the inclination angles of all the guide vanes are the same.

Through adopting above-mentioned technical scheme, combustion-supporting gas has formed fusiform flow structure under guide vane's effect after through secondary mixing hole, at the end of primary channel, makes gaseous gathering more on the one hand, and the velocity of flow is faster, has reduced the production in high temperature district, and then has reduced nitrogen oxide's formation, environmental protection more.

Preferably, the second channel is provided with a flow collecting vane obliquely on the outer wall of each fuel through hole.

By adopting the technical scheme, the flow gathering blades are arranged to guide and gather the flowing of the coal gas, so that the contact efficiency of the coal gas with combustion-supporting gas is increased, the combustion efficiency of flame is improved, and the stable and efficient combustion of the coke oven gas is realized.

Preferably, the deflecting direction of the flow collecting blade is the same as the deflecting direction of the guide vane.

By adopting the technical scheme, the deflection directions of the flow gathering blades and the guide blades are the same, so that the final mixing process of the combustion-supporting gas and the alternating-current gas forms a spindle shape, the mixing efficiency of the alternating-current gas and the combustion-supporting gas is improved, the combustion efficiency of flame is also improved, and the stable and efficient combustion of the coke oven gas is realized.

Preferably, the tail end of the primary channel is provided with a flame gathering cover which drives the flame to gather towards the middle of the primary channel in an extending mode.

By adopting the technical scheme, the flame converging cover plays a role in contracting the flame, so that on one hand, the flow velocity of the flame is improved, and the stable coke oven gas flame with strong rigidity and heat release rate is formed under the condition of the existence of wake flow in the pipeline, and on the other hand, the effective mixing of fuel and combustion-supporting air is realized.

Preferably, the direction of the port of the air outlet section is consistent with the direction of high-temperature flue gas flow in the pipeline.

By adopting the technical scheme, after the burner is ignited, the flame is sprayed in the pipeline in the presence of wake flow to form stable coke oven gas flame with strong rigidity and heat release rate, so that the stability of the flame is improved.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the maintenance efficiency is improved; the staff can drive the ignition rod displacement through the propeller, and make the burning torch enter into the ignition region, and after flame burning, make the burning torch remove out flame region, the life of burning torch has been improved on the one hand, be difficult for letting go of the damage, and the burning torch leaves the end of a passageway, can not disturb gaseous flow yet, thereby ensure the combustion efficiency of flame, even the burning torch breaks down, the staff also can drive the ignition rod displacement through the propeller, thereby dismantle ignition, ignition's maintenance efficiency has been improved greatly.

2. The environment is more protected; combustion-supporting gas passes through behind the secondary mixing hole under guide vane's effect, has formed fusiform flow structure at the end of primary channel, makes gaseous gathering more on the one hand, and the velocity of flow is faster, has reduced the production in high temperature district, and then has reduced nitrogen oxide's formation, environmental protection more.

3. The stability is strong; the flame collecting cover has the function of contracting the flame, and after the combustor is ignited, the flame is sprayed in the presence of the wake flow in the pipeline to form stable coke oven gas flame with strong rigidity and heat release rate, so that the stability of the flame is improved.

Drawings

FIG. 1 is a schematic view of the overall structure of a burner;

FIG. 2 is a schematic view showing a structure of a swirling flow flame stabilizing disc;

fig. 3 is a schematic view showing the structure of the ignition device.

Description of the reference numerals: 1. a base; 2. a primary channel; 21. an air intake section; 211. a combustion-supporting air inlet; 22. an air outlet section; 3. a secondary channel; 31. a fuel through hole; 32. a flow collecting blade; 33. a gas inlet; 4. a fire collecting cover; 41. an inlet and an outlet; 5. a swirling flame stabilizing disc; 51. a primary mixing orifice; 52. secondary mixing flow holes; 53. a guide vane; 6. an ignition device; 61. an ignition lever; 62. an ignition gun; 7. a propeller; 71. a propeller body; 72. a drive tube.

Detailed Description

The present application is described in further detail below with reference to the accompanying drawings, which are all incorporated in and constitute a part of this specification.

Example 1: the utility model provides a L type coke oven gas low NOx burner, as shown in figure 1, includes base 1, vertically wears to be equipped with a cylindric primary passageway 2 on the base 1, primary passageway 2 include with base 1 reciprocal anchorage's the section 21 of admitting air to and the section 22 of giving vent to anger of the terminal mutually perpendicular of the section 21 of admitting air, the tip of primary passageway 2 is for sealing the setting, and set up a combustion-supporting wind entry 211 that is used for letting in combustion-supporting gas on the section 21 of admitting air of primary passageway 2. A cylindrical secondary channel 3 coaxially penetrates through the middle part of the primary channel 2, the secondary channel 3 is of an L-shaped structure, two ends of the secondary channel are sealed, and a coal gas inlet 33 for introducing coke oven gas is formed in the secondary channel 3. The end of the air outlet section 22 of the primary channel 2 is coaxially fixed with a flame-gathering cover 4, and the edge of the flame-gathering cover 4 is folded toward the center of the flame-gathering cover 4, so that when the burner is in operation, the flame is more concentrated and the flame is more rigid under the guiding and folding of the flame-gathering cover 4.

As shown in fig. 2, a swirl flame stabilizing disc 5 is fixed in the flame converging cover 4, and the plane of the swirl flame stabilizing disc 5 is perpendicular to the axis of the flame converging cover 4. The tail end of the secondary channel 3 penetrates through the middle part of the rotational flow flame stabilizing disc 5 and is fixed with the edge of the rotational flow flame stabilizing disc 5. The circumferential surface of the tail end of the secondary channel 3 is uniformly punched to form a plurality of strip-shaped fuel through holes 31, the edge of each fuel through hole 31 is bent to form a plurality of flow gathering blades 32, and the bending angles of the flow gathering blades 32 are the same, so that the coke oven gas is more uniformly distributed under the guidance of the flow gathering blades 32. And a plurality of primary mixing holes 51 are uniformly arranged on the annular area of the rotational flow flame stabilizing disc 5 close to the secondary channel 3. When the primary channel 2 and the secondary channel 3 are simultaneously injected with corresponding gas, the coke oven gas flowing direction and the combustion-supporting air spraying direction of the primary mixing hole 51 are mutually interfered, so that the coke oven gas and the combustion-supporting gas are mutually mixed. The swirl flame stabilizing disc 5 is located at the edge of the primary mixing hole 51, and the swirl flame stabilizing disc 5 is used as a center of circle to uniformly stamp and form a plurality of strip-shaped secondary mixing holes 52, the edge of the secondary mixing hole 52 is bent towards the direction departing from the air outlet section 22, so that a plurality of guide vanes 53 are formed, the bending angle of each guide vane 53 is the same, and the bending direction of each guide vane 53 and the bending direction of the flow collecting vane 32 are the same, so that the coke oven gas can be mixed into the combustion-supporting gas sprayed from the secondary mixing hole 52 in a downstream manner after being primarily mixed with the combustion-supporting gas of the primary mixing hole 51, and under the action of the guide vanes 53, the mixed gas of the coke oven gas and the combustion-supporting gas forms a spindle-shaped flow structure in the flame collecting cover 4, on one hand, the flow velocity of the gas is accelerated, a high temperature region is not easy to form in the flame collecting cover 4, the discharge amount of NOx and CO is reduced, and the mixed gas is strong in flame rigidity and strong in stability after being ignited.

As shown in fig. 3, the base 1 is provided with an ignition device 6 for igniting the combustible gas in the flame-catching hood 4. The ignition device 6 comprises an ignition rod 61 connected with the base 1 in a sliding way, an ignition gun 62 is fixed at the end part of the ignition rod 61 facing the fire collecting hood 4, and a propeller 7 which drives the ignition rod 61 into the fire collecting hood 4 to cause the ignition gun 62 to ignite combustible gas is also fixed on the base 1.

As shown in fig. 3, the pusher 7 includes a pusher body 71, and a pneumatic drive pipe 72 is provided inside the pusher body 71. The propeller body 71 is fixed to the base 1 and the axis of the drive tube 72 passes through the axis of the furling shield 4. The driving pipe 72 is fixed coaxially with the ignition rod 61, and the other end of the propeller 7 body is provided with an opening and fixed on the base 1, so that the ignition rod 61 penetrates through the inside of the propeller 7 body, and the space occupation of the ignition device 6 is greatly reduced. And an inlet and an outlet 41 for accommodating the ignition gun 62 are arranged on the outer wall of the flame gathering cover 4. When a worker performs an ignition operation, the propeller 7 is controlled to drive the driving pipe 72 to displace, so that the ignition rod 61 is driven to move, the ignition gun 62 enters the flame gathering cover 4 from the inlet and outlet 41, the end of the ignition rod 61 is fed with gas, the ignition gun 62 is ignited, and the mixed gas in the flame gathering cover 4 is ignited. When the mixed gas in the flame collecting hood 4 is combusted, the ignition rod 61 is driven by the propeller 7 to displace, and the ignition gun 62 moves out of the flame collecting hood 4. The withdrawal of the ignition lance 62 reduces the disturbance of the air flow in the flame converging flap 4, ensures the stability of the flame combustion, and increases the service life of the ignition device 6.

And when the combustor is fixed, the orientation position of the air outlet section 22 of the primary channel 2 needs to be adjusted, so that the orientation of the tail end of the primary channel 2 is consistent with the direction of high-temperature flue gas flow in the pipeline, and therefore when the combustor burns, the wake flow in the pipeline cannot influence the tail flame of the combustor, and the flame burning is more stable.

The application embodiment of the L-shaped coke oven gas low-nitrogen combustor has the following implementation principle: when the burner is started, firstly, gas is introduced into the ignition rod 61, then the propeller 7 works to drive the ignition rod 61 to displace towards the direction of the flame gathering cover 4, and the ignition gun 62 enters into the flame gathering cover 4 through the inlet and outlet 41, and the gas is ignited by the combustion ignition gun. At this time, the combustion air inlet 211 is filled with combustion air, the gas inlet 33 is filled with gas, the ignition gun 62 ignites the mixed gas in the flame-gathering hood 4, the burner starts to work, the propeller 7 drives the ignition rod 61 to displace, and the ignition gun 62 moves out of the flame-gathering hood 4. In the load adjusting stage, the flow of the coke oven gas entering the gas inlet 33 is gradually increased, and the combustion air entering the air channel from the combustion air inlet 211 is matched, so that the stable and efficient combustion of the coke oven gas is realized.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. An L-shaped coke oven gas low-nitrogen burner is characterized in that: the device comprises a primary channel (2) for introducing combustion-supporting air, wherein the primary channel (2) comprises an air inlet section (21) and an air outlet section (22) which are arranged in an L shape, a base (1) for fixing with a pipeline is arranged on the air inlet section (21), a secondary channel (3) for introducing coal gas is erected in the primary channel (2), a fuel through hole (31) for discharging the coal gas is arranged at the tail end of the secondary channel (3), and an ignition device (6) for igniting mixed gas at the tail end of the primary channel (2) is arranged on the base (1);

ignition (6) include with base (1) the ignition pole (61) of sliding the connection, connect at the terminal burning torch (62) of ignition pole (61) to and drive ignition pole (61) drive burning torch (62) stretch into in primary channel (2) the ignition mist or drive burning torch (61) drive burning torch (62) keep away from propeller (7) that primary channel (2) are terminal.

2. The L-type coke oven gas low-nitrogen burner as claimed in claim 1, wherein: the thruster (7) comprises a thruster main body (71) and a driving pipe (72) which is positioned in the thruster main body (71) and is driven by gas to slide relative to the thruster main body (71), the ignition rod (61) is coaxially fixed in the driving pipe (72), and an opening for accommodating the ignition rod (61) to penetrate is formed in the bottom of the thruster main body (71).

3. The L-type coke oven gas low-nitrogen burner as claimed in claim 1, wherein: the primary channel (2) and the secondary channel (3) are both pipelines with circular sections, and the first channel and the secondary channel (3) are coaxially arranged.

4. The L-shaped coke oven gas low-nitrogen burner as claimed in claim 3, characterized in that: the section of giving vent to anger (22) internal seal is fixed with a whirl surely flame dish (5), whirl surely flame dish (5) are worn out to the end of secondary passageway (3) to seal fixedly with whirl surely flame dish (5), the end of secondary passageway (3) is for sealing the setting, the week side in secondary passageway (3) is evenly seted up in fuel through-hole (31), whirl surely flame dish (5) are located week side in secondary passageway (3) and evenly seted up one time muddy discharge hole (51).

5. The L-shaped coke oven gas low-nitrogen burner as claimed in claim 4, wherein: the periphery of the rotational flow flame stabilizing disc (5) positioned at the primary mixing hole (51) is uniformly provided with secondary mixing holes (52), and one side of each secondary mixing hole (52) positioned at the air outlet is fixed with an obliquely arranged guide vane (53).

6. The L-shaped coke oven gas low-nitrogen burner as claimed in claim 5, wherein: the secondary channel (3) is provided with a flow gathering blade (32) which is obliquely arranged on the outer wall of each fuel through hole (31).

7. The L-shaped coke oven gas low-nitrogen burner as claimed in claim 6, wherein: the deflection direction of the flow gathering blade (32) is the same as the deflection direction of the guide blade (53).

8. The L-type coke oven gas low-nitrogen burner as claimed in claim 1, wherein: the tail end of the primary channel (2) is provided with a flame gathering cover (4) which drives the flame to gather towards the middle part of the primary channel (2) in an extending way.

9. The L-shaped coke oven gas low-nitrogen burner as claimed in claim 1, characterized in that: the direction of the port of the air outlet section (22) is consistent with the direction of high-temperature flue gas flow in the pipeline.