A denitration burner capable of mechanically adjusting the fire position

Abstract

The utility model relates to burner technical field, a kind of denitration burner capable of mechanical adjustment fire position, it includes the adjusting nozzle installed at the end of ammonia gas activator, the adjusting nozzle is set fixed nozzle and adjusting disc inside sleeve, wherein adjusting disc can be driven to rotate, the relative angle of adjusting disc and fixed nozzle can be adjusted after adjusting disc can rotate, the area of the center passage of the both relatively can be switched by adjusting disc rotation, and whether adjusting outer circumferential passage is relatively, whereby the flame position of activated ammonia gas is adjusted, to adapt to use under different conditions. The present denitration burner is particularly suitable for use with pulverized coal combustion boiler, especially when the boiler low-heat heating or high-heat heating switching.

Description

Technical Field

[0001] This utility model relates to the field of burner technology, and in particular to a denitrification burner that can mechanically adjust the ignition position. Background Technology

[0002] In the existing technology, when denitrification burners are used in boilers, desulfurization burners generally have two operating states. The first operating state is the general combustion state, in which Brown gas and ammonia are used as fuels and oxygen is used as the combustion-supporting gas. In this state, ammonia combustion is used as the main heat source.

[0003] Another application of burners in boilers is in conjunction with pulverized coal. In this case, the outer flame height needs to be sufficient, and the pulverized coal output needs to be able to disperse and instantly burn the pulverized coal through flame pressure, thereby maximizing the use of the pulverized coal's calorific value.

[0004] Most burners can provide one operating mode, while some boilers provide two sets of burners, each with nozzles in different pipelines to cope with different situations, which is relatively more expensive. Utility Model Content

[0005] To address the aforementioned problems, this invention proposes a denitrification burner capable of mechanically adjusting the flame position. This burner can provide different flame positions and quickly and reliably switch flame patterns to cope with different situations.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A denitrification burner capable of mechanically adjusting the ignition position includes an ammonia activator, wherein the ammonia activator includes an output pipe for discharging activated ammonia. The output pipe is equipped with an adjusting nozzle, which includes a cylindrical sleeve, an adjusting disc, and a fixed nozzle. The first end of the sleeve is fitted onto the end of the output pipe and the connection is sealed. The fixed nozzle is fixedly installed on the second end of the sleeve. The adjusting disc is rotatably installed in the sleeve and is located between the fixed nozzle and the output pipe. One side of the adjusting disc is in contact with one side of the fixed nozzle. The adjusting disc has an eccentrically positioned first central channel and a plurality of annularly arranged first peripheral channels in an axial direction; the fixed nozzle has a second central channel and a plurality of annularly arranged second peripheral channels in an axial direction, the lower end of the second central channel is eccentrically positioned, and the first and second peripheral channels have the same number, the same diameter and are matched in position; In the first state, the first outer channel and the second outer channel are directly opposite each other, and the first central channel and the second central channel are partially opposite each other; after the adjustment disk is rotated at a certain angle, it enters the second state, in which the first outer channel and the second outer channel are staggered, and the first central channel and the second central channel are directly opposite each other.

[0007] Preferably, the first central channel and the second central channel have the same diameter.

[0008] Preferably, the ratio of the area of ​​the first central channel to the sum of the areas of the first peripheral channels is 1:2 to 1:3.

[0009] Preferably, the area of ​​effective connection between the first central channel and the second central channel in the first state is 30%-40% of the area of ​​the first central channel.

[0010] Preferably, the ratio of the area of ​​effective connection between the first central channel and the second central channel in the first state to the area of ​​effective connection between a single first peripheral channel and the second peripheral channel is 2:1-3:1.

[0011] Preferably, the end of the adjusting nozzle is provided with an igniter, and the ignition current of the igniter corresponds to the port of the second central channel.

[0012] Preferably, the sleeve is provided with a circumferentially opened window corresponding to the position of the adjusting plate, a driving mechanism is provided at the outer periphery of the adjusting nozzle, and a lever is provided at the window corresponding to the adjusting plate, the lever passing through the window and connected to the driving mechanism.

[0013] Preferably, the circumferential extension angle of the window corresponds to the maximum rotation angle of the adjustment disk.

[0014] Preferably, the end of the output pipe is spaced apart from the regulating plate, and a mixing chamber is formed between the end of the output pipe and the regulating plate.

[0015] Preferably, the axis of the upper section of the second central channel coincides with the axis of the fixed nozzle.

[0016] The beneficial effects of using this utility model are: This denitrification burner features an adjustable nozzle with a rotatable adjustment disc that allows for adjustment of the relative angle between the disc and the fixed nozzle. Rotation of the disc switches the relative areas of the central channels and adjusts the relative positions of the outer peripheral channels, thereby regulating the flame position for activating ammonia and adapting to different conditions. This denitrification burner is particularly suitable for use in boilers with pulverized coal combustion, especially during the transition between low-heat and high-heat heating. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a denitrification burner that can mechanically adjust the ignition position according to the present invention.

[0018] Figure 2 for Figure 1 A schematic diagram of the middle sleeve.

[0019] Figure 3 for Figure 1 A schematic diagram of the structure of the fixed nozzle.

[0020] Figure 4 for Figure 1 A schematic diagram of the structure of the central adjustment disc.

[0021] Figure 5 This is a schematic diagram of the fixed nozzle and adjusting disc working together in the first state of the denitrification burner of this utility model.

[0022] Figure 6 This is a schematic diagram showing the fixed nozzle and adjusting disc working together in the second state of the denitrification burner of this utility model.

[0023] Figure 7 This is a schematic diagram of the flame in the first state of a denitrification burner capable of mechanically adjusting the ignition position according to this utility model.

[0024] The reference numerals in the figures include: 10-Heating combustion tube, 11-Brown gas inlet tube, 12-Ammonia inlet tube, 13-First igniter, 14-Combustion tube, 15-Mixed gas delivery tube, 16-Oxygen inlet tube, 17-Second igniter; 20-Adjusting nozzle, 21-Mixing chamber, 22-Adjusting disc, 221-First central channel, 222-First peripheral channel, 23-Fixed nozzle, 231-Second central channel, 232-Second peripheral channel, 24-Lever, 25-Drive mechanism, 26-Sleeve, 261-Window. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this technical solution clearer, the following detailed description, in conjunction with specific embodiments, further illustrates this technical solution. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this technical solution.

[0026] like Figure 1As shown, this embodiment proposes a denitrification burner capable of mechanically adjusting the ignition position, including an ammonia activator. The ammonia activator includes an output pipe for outputting activated ammonia. An adjusting nozzle 20 is installed on the output pipe. The adjusting nozzle 20 includes a cylindrical sleeve 26, an adjusting disc 22, and a fixed nozzle 23. The first end of the sleeve 26 is fitted onto the end of the output pipe and the connection is sealed. The fixed nozzle 23 is fixedly installed on the second end of the sleeve 26. The adjusting disc 22 is rotatably installed in the sleeve 26. The adjusting disc 22 is located between the fixed nozzle 23 and the output pipe, and one end face of the adjusting disc 22 is in contact with one end face of the fixed nozzle 23.

[0027] Combination Figure 2 As shown, the sleeve 26 has a circumferentially oriented window 261 corresponding to the position of the adjusting disk 22. A drive mechanism 25 is provided on the outer periphery of the adjusting nozzle 20. A lever 24 is provided on the adjusting disk 22 corresponding to the window 261, and the lever 24 passes through the window 261 and connects to the drive mechanism 25. The drive mechanism 25 can rotate by adjusting the lever 24, thereby driving the adjusting disk 22 to rotate to a specific angle. In some feasible embodiments, the drive mechanism 25 is a servo stepper adjustment mechanism, which can accurately drive the adjusting disk 22 to rotate a predetermined angle.

[0028] Preferably, the circumferential extension angle of window 261 corresponds to the maximum rotation angle of adjustment disk 22. That is, when lever 24 is at the first circumferential end of window 261, adjustment disk 22 and first peripheral channel 222 are in the first state; when lever 24 is at the second circumferential end of window 261, adjustment disk 22 and first peripheral channel 222 are in the second state. At this time, the extension length and circumferential angle of window 261 have a limiting effect, making the rotation position of adjustment disk 22 more accurate.

[0029] A cross-sectional view of the fixed nozzle 23 along the axial direction is shown below. Figure 3 As shown, the fixed nozzle 23 has a second central channel 231 and several second peripheral channels 232 arranged in a ring array, with the lower end of the second central channel 231 eccentrically positioned. In this embodiment, there are six second peripheral channels 232. A cross-sectional view of the adjusting disc 22 along its axial direction is shown below. Figure 4 As shown, the adjusting disk 22 has an eccentrically positioned first central channel 221 and a plurality of first peripheral channels 222 arranged in a ring array. In this embodiment, there are six first peripheral channels 222. The number of first peripheral channels 222 and the number of second peripheral channels 232 are the same, their diameters are identical, and their positions are matched.

[0030] like Figure 5As shown, in the first state, when the regulating disc 22 and the fixed nozzle 23 are in coordination, the first peripheral channel 222 and the second peripheral channel 232 are aligned one after the other, and the first central channel 221 and the second central channel 231 are partially opposite each other. At this time, the activated ammonia gas output by the ammonia activator has flow in both the peripheral channels (formed by the combination of the first peripheral channel 222 and the second peripheral channel 232) and the central channel (formed by the combination of the first central channel 221 and the second central channel 231). Due to the dispersion of gas pressure in multiple channels, the gas pressure in each channel is relatively small, and the flame after the activated ammonia gas is ignited is as follows: Figure 1 As shown, the flame area is larger, resulting in more complete combustion of activated ammonia.

[0031] like Figure 6 As shown, after the regulating disc 22 rotates 90° around its axis, it enters the second state. In the second state, the first peripheral channel 222 and the second peripheral channel 232 are interleaved, and the first central channel 221 and the second central channel 231 are directly opposite each other. At this time, since the peripheral channels are completely closed and only the central channel is open, the activated ammonia gas can only be output through the central channel, resulting in a high gas output pressure. After the activated ammonia gas is ignited, it forms a... Figure 7 The flame shown is quite high. When used in a boiler, after the pulverized coal is output by the pulverized coal output device, the pulverized coal is rapidly dispersed and instantly combusted by high-pressure gas and the ignited flame, achieving a combustion efficiency of over 95% and maximizing the utilization of calorific value by the boiler.

[0032] Preferably, the ratio of the area of ​​the first central channel 221 to the total area of ​​the first peripheral channel 222 is 1:2-1:3. As the main output channel for activated ammonia, the central channel concentrates the gas and makes it easy to be ignited by the second igniter 17. If the area of ​​the central channel is too small, it is not easy to ignite. If the central channel is too large, it disperses the activated ammonia and greatly reduces the combustion effect.

[0033] Preferably, the area of ​​effective communication between the first central channel 221 and the second central channel 231 in the first state is 30%-40% of the area of ​​the first central channel 221, and the ratio of the area of ​​effective communication between the first central channel 221 and the second central channel 231 in the first state to the area of ​​effective communication between a single first peripheral channel 222 and the second peripheral channel 232 is 2:1-3:1. This area ratio is beneficial for dispersing activated ammonia gas into each peripheral channel.

[0034] Preferably, the end of the output pipe is spaced apart from the regulating plate 22, and a mixing chamber 21 is formed between the end of the output pipe and the regulating plate 22. The function of the mixing chamber 21 is to fully mix the activated ammonia output from the ammonia activator and the configured combustion-supporting gas in the mixing chamber 21.

[0035] Preferably, the axis of the upper section of the second central channel 231 coincides with the axis of the fixed nozzle 23, so that the second central channel 231 can quickly ignite the activated ammonia gas output from the surrounding second peripheral channels 232.

[0036] In addition, this embodiment provides a feasible solution for an ammonia activator, as detailed below: The ammonia activator is used to activate ammonia by burning Brown gas to form a mixed gas; the mixed gas delivery pipe 15 has its first end connected to the ammonia activation equipment and its second end as the mixed gas output end; the combustion pipe 14 is fitted outside the mixed gas delivery pipe 15, and the second end of the mixed gas delivery pipe 15 is located inside the combustion pipe 14; the oxygen input pipe 16 is connected to the side wall of the combustion pipe 14 and communicates with the inside of the combustion pipe 14, and is used to deliver oxygen into the combustion pipe 14.

[0037] Specifically, the ammonia activation equipment includes a heating combustion tube 10, which is the equipment required for ammonia activation. A Brown gas input pipe 11 is provided at the lower end of the heating combustion tube 10. The side of the Brown gas input pipe 11 is not only equipped with a first igniter 13, but also a first igniter used to ignite the Brown gas inside the heating combustion tube 10. An ammonia input pipe 12 is provided inside the heating combustion tube 10 at the end position of the Brown gas input pipe 11, and the ammonia input pipe 12 is slightly lower than the end of the Brown gas input pipe 11.

[0038] As described above, the Brown gas, after being introduced into the heating combustion tube 10, can be ignited by the first igniter 13. To ensure effective and stable combustion of the hydrogen-oxygen mixture in the combustion heating chamber, the molar ratio of the hydrogen-oxygen mixture produced by water electrolysis is H2:O2=2:1, and the flame propagation speed of the hydrogen-oxygen mixture is approximately 2.0-2.5 m / s. Based on the burner specifications and the hydrogen requirements due to ammonia decomposition rate, the diameter of the Brown gas pipe outlet needs to be optimized according to the outlet velocity of the hydrogen-oxygen mixture, the ammonia flow rate, and the pressure in the combustion heating chamber. The outlet velocity of the hydrogen-oxygen mixture must be greater than its flame propagation speed but less than the blow-out limit of the hydrogen flame to ensure stable combustion. The ammonia flow rate in the combustion heating chamber affects the pressure within the chamber and the interference of airflow disturbances on flame combustion stability; therefore, the Brown gas pipe outlet diameter should be as large as possible while ensuring stable combustion of the hydrogen-oxygen mixture.

[0039] The aforementioned hydrogen-based ammonia reburner is used to realize the hydrogen-based ammonia reburning method, which includes: introducing Brown gas into a closed space and igniting the Brown gas; introducing ammonia gas during the Brown gas ignition process; heating and activating the ammonia gas during the Brown gas combustion process; extracting the products after Brown gas combustion and the high-temperature ammonia gas and adding combustion-supporting gas; and igniting the above-mentioned mixed gas to achieve the effect of ammonia combustion.

[0040] The mixture formed by the combustion of ammonia and Brown gas inside the heating combustion tube 10 is transported to the combustion tube 14 through the mixture delivery pipe 15. An oxygen input pipe 16 is provided near the lower end of the tube wall of the combustion tube 14. The oxygen input pipe 16 enters the space between the mixture delivery pipe 15 and the combustion tube 14.

[0041] The structure of the ammonia activator in this denitrification burner is not limited to the ammonia activator described above; it is only used as an example.

[0042] It should be noted that, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. At the same time, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0043] The above content is only a preferred embodiment of this utility model. For those skilled in the art, many changes can be made in the specific implementation and application scope based on the ideas of this technical content. As long as these changes do not depart from the concept of this utility model, they all fall within the protection scope of this patent.

Claims

1. A denitrification burner capable of mechanically adjusting the ignition position, comprising an ammonia activator, said ammonia activator including an output pipe for outputting activated ammonia, characterized in that: The output pipe is equipped with an adjusting nozzle, which includes a cylindrical sleeve, an adjusting disc, and a fixed nozzle. The first end of the sleeve is fitted onto the end of the output pipe and the connection is sealed. The fixed nozzle is fixedly installed on the second end of the sleeve. The adjusting disc is rotatably installed in the sleeve and is located between the fixed nozzle and the output pipe. One side of the adjusting disc is in contact with one side of the fixed nozzle. The adjusting disc has an eccentrically positioned first central channel and a plurality of annularly arranged first peripheral channels in an axial direction; the fixed nozzle has a second central channel and a plurality of annularly arranged second peripheral channels in an axial direction, the lower end of the second central channel is eccentrically positioned, and the first and second peripheral channels have the same number, the same diameter and are matched in position; In the first state, the first outer channel and the second outer channel are directly opposite each other, and the first central channel and the second central channel are partially opposite each other; after the adjustment disk is rotated at a certain angle, it enters the second state, in which the first outer channel and the second outer channel are staggered, and the first central channel and the second central channel are directly opposite each other.

2. The denitrification burner capable of mechanically adjusting the ignition position according to claim 1, characterized in that: The first central channel and the second central channel have the same diameter.

3. The denitrification burner capable of mechanically adjusting the ignition position according to claim 1, characterized in that: The ratio of the area of ​​the first central channel to the total area of ​​the first peripheral channel is 1:2-1:

3.

4. The denitrification burner capable of mechanically adjusting the ignition position according to claim 1, characterized in that: The area of ​​effective connection between the first central channel and the second central channel in the first state is 30%-40% of the area of ​​the first central channel.

5. The denitrification burner capable of mechanically adjusting the ignition position according to claim 1, characterized in that: The ratio of the area of ​​effective connection between the first central channel and the second central channel in the first state to the area of ​​effective connection between a single first peripheral channel and the second peripheral channel is 2:1-3:

1.

6. The denitrification burner capable of mechanically adjusting the ignition position according to claim 1, characterized in that: The end of the adjusting nozzle is equipped with an igniter, and the ignition current of the igniter corresponds to the port of the second central channel.

7. The denitrification burner capable of mechanically adjusting the ignition position according to claim 1, characterized in that: The sleeve is provided with a circumferentially opened window corresponding to the position of the adjusting plate. A driving mechanism is provided at the outer periphery of the adjusting nozzle. A lever is provided at the window corresponding to the adjusting plate. The lever passes through the window and is connected to the driving mechanism.

8. The denitrification burner capable of mechanically adjusting the ignition position according to claim 7, characterized in that: The circumferential extension angle of the window corresponds to the maximum rotation angle of the adjustment disk.

9. The denitrification burner capable of mechanically adjusting the ignition position according to claim 1, characterized in that: The end of the output pipe is spaced apart from the regulating plate, and a mixing chamber is formed between the end of the output pipe and the regulating plate.

10. The denitrification burner capable of mechanically adjusting the ignition position according to claim 1, characterized in that: The axis of the upper section of the second central channel coincides with the axis of the fixed nozzle.

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