CN117781274A - A hydrogen-burning low NOx and CO emission burner system and its use method - Google Patents

Abstract

This application relates to a hydrogen-burning low NOx and CO emission burner system and its use method, and relates to the field of combustion facilities. The hydrogen-burning low NOx and CO emission burner system includes a cylinder, and a gas distribution plate is provided in the cylinder. The air distribution plate divides the space in the cylinder into an air delivery chamber and an air mixing chamber. The air distribution plate is provided with a plurality of air outlets. An igniter is provided in the air mixing chamber; and an igniter is provided in the cylinder. A hydrogen transport chamber. The hydrogen transport chamber is connected with a plurality of hydrogen transport pipes. The plurality of hydrogen transport pipes all pass through the gas distribution plate. The part of the hydrogen transport pipe that penetrates the gas distribution plate is located on the mixing plate. The gas chamber is also provided with a hydrogen outlet. This application has the effect of increasing the effective contact surface area between hydrogen and air, making hydrogen and air more fully mixed, thereby improving the combustion efficiency of the burner.

Description

A hydrogen-burning low NOx and CO emission burner system and its use method

Technical field

The present application relates to the field of combustion facilities, and more particularly to a hydrogen-burning low NOx and CO emission burner system and a method of using the same.

Background technique

Hydrogen is a common by-product in the industrial production process. It is also an environmentally friendly clean fuel. Hydrogen combustion produces water. During its combustion process, it will not produce NOx and CO emissions. Therefore, hydrogen-burning burners are widely used in industry. has been widely used. At present, common hydrogen burners use a double-pipe delivery method of hydrogen and combustion air, that is, hydrogen and combustion air are transported into the burner through one pipe respectively, and the hydrogen and combustion air are mixed for combustion when they are discharged through the pipe opening, but This transportation method results in insufficient mixing of hydrogen and air, and part of the hydrogen is easily discharged directly without being mixed with air. The effective contact surface area between hydrogen and air is insufficient, resulting in low combustion efficiency.

Contents of the invention

In order to improve the problems existing in the above-mentioned technologies, the present application provides a hydrogen-burning low NOx and CO emission burner system and a method of using the same.

This application provides a hydrogen-burning low NOx and CO emission burner system and its use method, which adopts the following technical solutions:

A hydrogen-burning low NOx and CO emission burner system includes a cylinder, and a gas distribution plate is provided in the cylinder. The gas distribution disk divides the space in the cylinder into an air delivery chamber and an air mixing chamber. A plurality of air outlets are provided on the gas distribution plate, and an igniter is provided in the gas mixing chamber; a hydrogen transport chamber is provided in the cylinder, and a plurality of hydrogen transport pipes are connected to the hydrogen transport chamber. The tubes all pass through the gas distribution plate, and the portion of the hydrogen transport pipe that passes through the gas distribution plate is located in the gas mixing chamber and has a hydrogen outlet.

By adopting the above technical solution, when the burner is used, it is first ignited through the igniter. After the flame is generated, combustion air is delivered to the air delivery chamber, and the air is sprayed to the air mixing chamber through multiple air outlets on the air distribution plate; At the same time, hydrogen is delivered to the hydrogen delivery chamber. After the hydrogen passes through a plurality of hydrogen delivery pipes, it is sprayed out to the mixing chamber through the hydrogen outlet, and the hydrogen is mixed with air for combustion. The combustion air is dispersed during the process of being sprayed through multiple air outlets. Since multiple hydrogen delivery pipes are penetrated through the gas distribution plate, the hydrogen outlets are also dispersed to various areas of the mixing chamber through the hydrogen delivery pipes. When the hydrogen passes through When each hydrogen outlet is ejected, the dispersed hydrogen and dispersed air will be fully contacted and mixed, thereby increasing the effective contact surface area of hydrogen and air, making hydrogen and air more fully mixed, thereby improving the efficiency of the burner. combustion efficiency purposes.

Optionally, the plurality of hydrogen transport pipes include at least one first transport pipe and at least one second transport pipe connected with the hydrogen gas transport chamber. The first transport pipe and the second transport pipe are parallel to each other and both pass through the hydrogen gas transport chamber. Provide the gas distribution plate, the hydrogen outlet includes a first outlet and a second outlet, a plurality of first outlets are provided on the side of the portion of the first delivery pipe that passes through the gas distribution plate, and the third outlet A plurality of second outlets are provided on the top of the portion of the two conveying pipes that pass through the gas distribution plate.

By adopting the above technical solution, the hydrogen transported by the hydrogen transport chamber enters the first transport pipe and the second transport pipe, and then is ejected through the first outlet and the second outlet. Since the first outlet is opened at the side of the first transport pipe and the second outlet is opened at the top of the second transport pipe, the hydrogen ejected through the first outlet and the second outlet will be ejected at different angles, so that the hydrogen can be dispersed as much as possible and can be fully and evenly mixed with the air in the mixing chamber from different directions; and, the hydrogen ejected at different angles push each other during the ejection process, so that it can diffuse to a farther area of the mixing chamber and be more fully mixed with the surrounding air.

Optionally, a plurality of second outlets on the top of the second delivery pipe are arranged at a plurality of different inclination angles.

By adopting the above technical solution, the hydrogen transported through the second delivery pipe is ejected through the second outlet with different inclination angles, thereby further dispersing the hydrogen in the gas mixing chamber, thereby further improving the relationship between hydrogen and Adequate mixing of air.

Optionally, the first conveying pipe includes a conveying pipe and a first conveying head, the first outlet is opened on a side of the first conveying head, and the first conveying head and the conveying pipe are detachable. Connection; the second conveying pipe includes a conveying pipe and a second conveying head, the second outlet is opened on the top of the second conveying head, and the second conveying head is detachably connected to the conveying pipe.

By adopting the above technical solution, the first delivery pipe and the second delivery pipe are composed of a delivery pipe and a corresponding delivery head, and the delivery pipe is detachably connected to the corresponding delivery head, so that the first delivery head in the burner can be and the number and proportion of the second delivery head, thereby adjusting the output wind direction of the hydrogen. The different injection angles of the hydrogen will have an impact on the flame shape and stability of the burner. Therefore, by controlling the first The number and ratio of delivery heads to secondary delivery heads can further control the shape and stability of the flame.

Optionally, the air distribution plate includes a fixed seat and an air distribution plate. The fixed seat is fixed in the cylinder. The air distribution plate is detachably connected to the fixed seat. A plurality of air outlets are opened at all locations. Describe the air distribution board.

By adopting the above technical solution, the air outlet is opened on the air distribution plate. The aperture size and number of the air outlets in the burner will have an impact on the air concentration in the mixing chamber, which will further affect the mixing ratio of hydrogen and air and the energy generated by the burner. The oxygen content in the flame has an impact. Therefore, the gas distribution plate is detachably installed on the fixed seat. When different flame specifications are required to meet different needs, the gas distribution plate in the burner can be replaced to make the distribution The size and number of the air outlets on the gas plate meet the requirements, so that the air concentration in the air mixing chamber can be controlled, thereby ensuring the precise ratio of hydrogen and air and making the flame combustion stable.

Optionally, the hydrogen transport pipe includes a transport pipe connected to the hydrogen transport chamber, a transport head is threadedly connected to the transport pipe, and both sides of the gas distribution plate are respectively pressed against the fixed seat and the transport head.

By adopting the above technical scheme, the threaded connection between the delivery head and the delivery pipe can facilitate the disassembly and assembly of the delivery head, thereby adjusting the number of delivery heads to control the hydrogen concentration in the mixing chamber, further ensuring the precise ratio of hydrogen and air; and when installing the gas separator plate, place the gas separator plate on the fixed seat so that one side of the gas separator plate is pressed against the fixed seat, and then rotate the delivery head to connect it to the corresponding delivery pipe. When the delivery head is pressed against the side of the gas separator plate away from the fixed seat, the positions of the gas separator plate and the delivery head are fixed, and the disassembly and assembly method is simple and convenient; and when the air outlet and the hydrogen outlet need to be cleaned, the delivery head and the gas separator plate can be simultaneously disassembled and assembled by twisting the delivery head, thereby further improving the convenience of using the burner.

Optionally, a swirl chamber is provided in the middle of the air distribution plate, and a plurality of swirl plates are arranged in the circumferential direction in the swirl chamber. The swirl plates are arranged at an angle, and two adjacent swirl plates are arranged at an angle. A swirl channel is formed between the plates, and both the air delivery chamber and the air mixing chamber are connected with the swirl channel.

By adopting the above technical solution, part of the air transported through the air delivery chamber is directly sprayed into the air mixing chamber through the air outlet on the air distribution plate, and the other part is transported to the swirl chamber. The air transported to the swirl chamber passes through multiple A swirl flow channel is sprayed into the air-mixing chamber. Since the swirl flow channel is surrounded by a swirl flow plate, and the swirl flow plate is tilted along the circumferential direction of the swirl flow cavity in the swirl flow cavity, so that the swirl flow passages pass through multiple swirl flow channels. The air ejected from the flow channel will form a rotating vortex airflow. The rotating vortex airflow has both the axial speed of forward movement and the tangential speed of circular motion, so that the airflow can disturb the axial and tangential directions in the direction of flow. Enhanced, hydrogen can be dispersed by the air flow and mixed with air more intensively and evenly, forming dispersed and multiple staged combustion, forming a swirling and elegant blue flame, which greatly reduces the generation of NOx.

Optionally, the igniter includes an ignition hydrogen delivery pipe disposed in the middle of the gas distribution plate, an ignition gun is provided in the ignition hydrogen delivery pipe, the ignition hydrogen delivery pipe passes through the air delivery chamber, and the ignition hydrogen delivery pipe passes through the air delivery chamber. The hydrogen delivery pipe is provided with an ignition air inlet connected to the air delivery chamber.

By adopting the above technical solution, the ignition hydrogen transport pipe is used to transport hydrogen. The combustion air in the air transport chamber enters the ignition hydrogen transport pipe through the ignition air inlet. Hydrogen and air are thus mixed in the ignition hydrogen transport pipe. The ignition gun is This uses mixed hydrogen and air for ignition. Since the ignition hydrogen delivery pipe is set in the middle of the gas distribution plate, the flame generated by the ignition gun will continue to burn in the middle during the use of the burner. The mixed gas delivered to the mixing chamber by the hydrogen delivery pipe will be fully contacted with the mixed gas for combustion.

On the other hand, the present application provides a method of using a hydrogen-burning low NOx and CO emission burner system. Applying the above-mentioned hydrogen-burning low NOx and CO emission burner system includes the following steps:

S1: Inject nitrogen into the air delivery chamber and hydrogen delivery chamber, and the nitrogen cleans the air delivery chamber and hydrogen delivery chamber and evacuates the hydrogen and air in the burner;

S2: The igniter ignites and the flame is generated;

S3: Air is introduced into the air delivery chamber, hydrogen gas is introduced into the hydrogen delivery chamber, and the air and hydrogen are mixed and burned.

To sum up, this application includes at least one of the following beneficial technical effects:

1. The combustion air is dispersed during the process of being sprayed through multiple air outlets. Since multiple hydrogen delivery pipes are penetrated through the air distribution plate, the hydrogen outlets are also dispersed to various areas of the mixing chamber through the hydrogen delivery pipes. When When hydrogen is ejected through each hydrogen outlet, the dispersed hydrogen and dispersed air will be fully contacted and mixed, thereby increasing the effective contact surface area of hydrogen and air, making hydrogen and air more fully mixed, thereby improving combustion. The purpose of combustion efficiency of the device;

2. The hydrogen transported by the hydrogen transport chamber enters the first transport pipe and the second transport pipe, and then is ejected through the first outlet and the second outlet. Since the first outlet is opened at the side of the first transport pipe and the second outlet is opened at the top of the second transport pipe, the hydrogen ejected through the first outlet and the second outlet will be ejected at different angles, so that the hydrogen can be dispersed as much as possible and can be fully and evenly mixed with the air in the mixing chamber from different directions; and the hydrogen ejected at different angles push each other during the ejection process, so that it can be diffused to a farther area of the mixing chamber and be more fully mixed with the surrounding air;

3. Part of the air transported through the air delivery chamber is directly sprayed into the air mixing chamber through the air outlet on the air distribution plate, and the other part is transported to the swirl chamber. The air transported to the swirl chamber passes through multiple swirl channels. Sprayed into the air-mixing chamber, since the swirl channels are surrounded by swirl plates, and the swirl plates are tilted along the circumferential direction of the swirl chamber, so that the swirl channels are ejected through multiple swirl channels. The air will form a rotating vortex airflow. The rotating vortex airflow has both the axial speed of forward movement and the tangential speed of circular motion, so that the airflow has enhanced axial and tangential disturbance capabilities in the direction of flow, and hydrogen can It is dispersed by the air flow and mixed more intensively and evenly with the air to form dispersed and multiple staged combustion, forming a swirling and elegant blue flame, which greatly reduces the generation of NOx.

Description of the drawings

Figure 1 is a schematic diagram of the overall structure of a hydrogen-burning low NOx and CO emission burner system in Embodiment 1 of the present application;

Figure 2 is a cross-sectional view of Embodiment 1 of the present application;

Figure 3 is a front view of the cooperation between the gas distribution plate and the hydrogen transport chamber in Embodiment 1 of the present application;

FIG4 is a schematic diagram of the coordination between the gas distribution plate and the hydrogen delivery chamber in Example 1 of the present application;

Figure 5 is a schematic diagram of the cooperation between the first delivery pipe, the second delivery pipe and the hydrogen delivery chamber in Embodiment 1 of the present application;

Figure 6 is a schematic diagram of the cooperation between the air distribution plate and the fixed seat in Embodiment 1 of the present application.

Explanation of reference signs: 1. Cylinder; 2. Air delivery chamber; 3. Air mixing chamber; 4. Air distribution plate; 41. Fixing seat; 42. Air distribution plate; 5. Air outlet; 6. Igniter; 61 , Ignition gun; 62. Ignition hydrogen delivery pipe; 7. Hydrogen delivery chamber; 8. Hydrogen delivery pipe; 81. First delivery pipe; 82. Second delivery pipe; 83. Delivery pipe; 84. First delivery head; 85 , Second conveying head; 9. First outlet; 10. Second outlet; 11. Peripheral plate; 12. Inner plate; 13. Swirl channel; 14. Swirl plate; 15. Ignition air inlet; 16. Combustion Hydrogen delivery pipe; 17. Combustion air delivery pipe.

Detailed ways

The present application will be further described in detail below in conjunction with Figures 1-6.

Example 1

Embodiment 1 of the present application discloses a hydrogen-burning low NOx and CO emission burner system. Referring to Figures 1 and 2, the hydrogen-burning low NOx and CO emission burner system includes a cylinder 1. An air distribution plate 4 is provided inside the cylinder 1. The air distribution plate 4 divides the space in the cylinder 1 into air delivery chambers 2 There is a gas mixing chamber 3, a plurality of air outlets 5 are provided on the gas distribution plate 4, an igniter 6 is provided in the gas mixing chamber 3; a hydrogen transport chamber 7 is provided in the cylinder 1, and a plurality of hydrogen gases are connected to the hydrogen transport chamber 7 The transportation pipe 8 and the plurality of hydrogen transportation pipes 8 all pass through the gas distribution plate 4. The portion of the hydrogen transportation pipe 8 that passes through the gas distribution plate 4 is located in the gas mixing chamber 3 and has a hydrogen outlet.

Referring to Figure 2, the cylinder 1 is installed with a combustion hydrogen delivery pipe 16 connected to the hydrogen delivery chamber 7 and a combustion air delivery pipe 17 connected to the air delivery chamber 2. Each hydrogen delivery pipe 8 includes a Conveying pipes 83, each conveying pipe 83 is threadedly connected with a conveying head; referring to Figures 3 and 4, the conveying head includes a first conveying head 84 and a second conveying head 85 made of high-temperature resistant stainless steel materials. The top ends of the two conveying heads 85 are in the shape of a pointed cone, the first conveying head 84 is threadedly connected to a conveying pipe 83 to form a first conveying pipe 81, and the second conveying head 85 is threadedly connected to a conveying pipe 83 to form a second conveying pipe. 82. The plurality of hydrogen transport pipes 8 include a plurality of first transport pipes 81 and a plurality of second transport pipes 82; the plurality of first transport pipes 81 and the plurality of second transport pipes 82 are parallel to each other and both pass through the gas distribution plate 4 , the hydrogen outlet includes a first outlet 9 and a second outlet 10. A plurality of first outlets 9 are provided on the side of the part where the first delivery pipe 81 goes out of the gas distribution plate 4, and the second delivery pipe 82 goes out of the gas distribution plate. A plurality of second outlets 10 are provided on the top of the portion 4, and the plurality of second outlets 10 on the top of the second delivery pipe 82 are arranged at an inclination of 25 degrees and 35 degrees.

In the embodiment of the present application, the inclination angle of the second outlet 10 on the second conveying pipe 82 is selected to be 25 degrees and 35 degrees.

The hydrogen delivered by the hydrogen delivery chamber 7 enters the first delivery pipe 81 and the second delivery pipe 82, and is then ejected through the first outlet 9 and the second outlet 10. The flow rate of the hydrogen ejected through the first outlet 9 and the second outlet 10 is The ratio is 1.5:1, because the first outlet 9 is opened at the side of the first delivery pipe 81 and the second outlet 10 is opened at the top of the second delivery pipe 82, and each second outlet 10 is located at The top is tilted at different angles, so that the hydrogen gas ejected through the first outlet 9 and the second outlet 10 will be ejected through multiple different angles, so that the hydrogen gas can be dispersed as much as possible and can interact with the gas mixing chamber from different directions. The air in 3 is fully and evenly mixed, so that the air is burned through multi-point dispersion and cross-mixing to stabilize the flame and reduce the generation of NOx; and the hydrogen ejected from different angles push each other during the ejection process. , so that it can diffuse to the farther area of the air mixing chamber 3 and be more fully mixed with the surrounding air.

Since the first conveying head 84 and the second conveying head 85 are connected to the corresponding conveying pipe 83 through a threaded connection, both the first conveying head 84 and the second conveying head 85 can be detached from the corresponding conveying pipe 83 Come down and reinstall, and the shape and stability of the flame can be further controlled by controlling the number and proportion of the first delivery head 84 and the second delivery head 85 in the burner.

Referring to Figures 5 and 6, the air distribution plate 4 includes a fixed seat 41 and an air distribution plate 42. The fixed seat 41 is installed in the cylinder 1, the air distribution plate 42 is close to the fixed seat 41, and multiple air outlets 5 are opened. On the air distribution plate 42; the diameters of the first conveying head 84 and the second conveying head 85 are both larger than the diameter of the conveying pipe 83. When the first conveying head 84 and the second conveying head 85 are installed on the corresponding conveying pipe 83, Both sides of the air distribution plate 42 are respectively pressed against the fixed seat 41 and the conveying head.

The air outlet 5 is opened on the air distribution plate 42. The aperture size and number of the air outlet 5 in the burner will have an impact on the air concentration in the air mixing chamber 3, thereby affecting the mixing ratio of hydrogen and air and the flame generated by the burner. has an impact on the oxygen content. Therefore, the gas distribution plate 42 is detachably installed on the fixed seat 41. When different flame specifications are required to meet different needs, the gas distribution plate 42 in the burner can be replaced, so that The hole size and number of the air outlets 5 on the air distribution plate 42 meet the requirements. When installing the air distribution plate 42, place the air distribution plate 42 on the fixed seat 41 so that one side of the air distribution plate 42 is pressed against the fixed seat 41, and then rotate the conveying head to connect it to the corresponding conveying pipe 83. , when the conveying head and the side of the air distribution plate 42 away from the fixed seat 41 are pressed tightly, the positions of the air distribution plate 42 and the conveying head are fixed, and the disassembly and assembly method is simple and convenient; and when it is necessary to carry out the air outlet 5 and the hydrogen outlet During cleaning, the synchronous disassembly and assembly of the conveyor head and the air distribution plate 42 can be completed by twisting the conveyor head.

Referring to Figures 5 and 6, a swirl chamber is provided in the middle of the air distribution plate 42. An annular peripheral plate 11 and an annular inner wall plate 12 are fixed in the swirl chamber. The outer wall plate 11 and the inner wall plate 12 are the same. An installation cavity is formed between the outer peripheral plate 11 and the inner outer plate 12. In the installation cavity, a plurality of swirl plates 14 are arranged obliquely along the circumferential direction; one end of the swirl plate 14 is fixed to the peripheral plate 11, and the other end is connected to the peripheral plate 11. The inner wall plate 12 is fixed, and a swirl channel 13 is formed between two adjacent swirl plates 14. The air delivery chamber 2 and the air mixing chamber 3 are both connected to the swirl channel 13.

Part of the air transported through the air delivery chamber 2 is directly sprayed into the air mixing chamber 3 through the air outlet 5 on the air distribution plate 42, and the other part is transported to the swirl chamber. The air transported to the swirl chamber passes through multiple cyclones. The flow channel 13 is sprayed into the air mixing chamber 3. Since the swirl channel 13 is surrounded by a swirl plate 14, and the swirl plate 14 is tilted along the circumferential direction of the swirl chamber in the swirl chamber, so that the flow passage 13 is surrounded by a swirl plate 14. The air ejected from the plurality of swirl channels 13 will form a rotating vortex airflow. The rotating vortex airflow has both an axial speed of forward movement and a tangential speed of circular motion, so that the airflow can axially and tangentially move in the direction of the flow. The directional disturbance ability is enhanced, and the hydrogen can be dispersed by the air flow and mixed with the air more intensively and evenly, forming dispersed and multiple staged combustion, forming a swirling and elegant blue flame, which greatly reduces the generation of NOx.

Referring to Figures 2 and 3, the igniter 6 includes an ignition hydrogen delivery pipe 62 installed in the inner wall plate 12. The outer wall of the ignition hydrogen delivery pipe 62 is in contact with the inner wall of the inner wall plate 12; there are points installed in the ignition hydrogen delivery pipe 62. The gun 61 and the ignition hydrogen transport pipe 62 pass through the air transport chamber 2. The ignition hydrogen transport pipe 62 is provided with an ignition air inlet 15 connected with the air transport chamber 2.

The ignition hydrogen transport pipe 62 is used to transport hydrogen. The combustion air in the air transport chamber 2 enters the ignition hydrogen transport pipe 62 through the ignition air inlet 15. Hydrogen and air are thus mixed in the ignition hydrogen transport pipe 62. The ignition gun 61 thus utilizes mixed hydrogen and air for ignition; since the ignition hydrogen delivery pipe 62 is provided in the middle of the gas distribution plate 42, the flame generated by the ignition gun 61 will continue to burn in the middle during the use of the burner. , the air-fuel mixture delivered to the air-mixing chamber 3 through the air distribution plate 42, the first delivery pipe 81 and the second delivery pipe 82 will fully contact the air-fuel mixture for combustion.

The ignition gun 61 is made of special heat-resistant steel. Normal operation continuously ensures a small load flame in the center, so that the center of the burner flame is always in a hydrogen ignition state, thus ensuring that the flame can burn stably and not flame out no matter what working conditions it is. Burning hydrogen is safe and reliable.

The implementation principle of a low NOx and CO emission burner system for burning hydrogen in Example 1 of the present application is as follows: when the burner is used, it is first ignited by an ignition gun 61. After the flame is generated, combustion-supporting air is delivered to the air delivery chamber 2, and the air is ejected to the mixing chamber 3 through the multiple air outlets 5 on the air distribution plate 42; at the same time, hydrogen is delivered to the hydrogen delivery chamber 7, and after the hydrogen passes through the multiple first delivery heads 84 and the second delivery heads 85, it is ejected to the mixing chamber 3 through the first outlet 9 and the second outlet 10, and the hydrogen is mixed with air for combustion. The combustion-supporting air is dispersed during the process of being ejected through the multiple air outlets 5. The multiple first delivery heads 84 and the second delivery heads 85 are dispersed on the gas distribution plate 4, and are dispersedly arranged in the gas mixing chamber 3, so that the hydrogen ejected through the multiple first delivery pipes 81 and the second delivery pipes 82 is dispersed as much as possible to perform layered combustion. A part of the air enters the central combustion zone from around the ignition gun 61, and the other part of the air is mixed in layers around the first delivery heads 84 and the second delivery heads 85 to burn with the fuel, forming staged combustion of air and fuel. A plurality of relatively large negative pressure areas are formed in the cylinder 1, so that the flue gas in the furnace forms a plurality of internal circulations, which greatly reduces the generation of NOx and CO; and when the hydrogen is ejected through the first outlets 9 and the second outlets 10, the dispersed hydrogen and the dispersed air will produce sufficient The two gases are contacted and mixed, thereby achieving the purpose of increasing the effective contact surface area of hydrogen and air, making the hydrogen and air mix more fully, and then improving the combustion efficiency of the burner; the heat load of the burner system involved in the embodiment of the present application is 0.35MW~0.8MW, the fuel gas is hydrogen, and the combustion-supporting wind is controlled separately. It is suitable for large and medium-sized rotary dryers, hot air furnaces and heating furnaces, conforms to bottom burning, side burning, blue circular multi-level vortex flame, and is suitable for burning hydrogen; it adopts advanced technologies such as weakened combustion, air staging, fuel staging, external mixing diffusion, internal flue gas circulation and multi-point dispersed combustion, and makes the best use of the effective combustion space, disperses the central flame, makes the combustion flame diffuse in the entire space, reduces the average flame temperature and peak temperature, and reduces the generation of NOx and CO.

Example 2

Embodiment 2 of the present application discloses a method of using a hydrogen-burning low NOx and CO emission burner system. Applying a hydrogen-burning low NOx and CO emission burner system in Example 1 includes the following steps:

S1: Inject nitrogen into the air delivery chamber 2 and the hydrogen delivery chamber 7, and the nitrogen cleans the air delivery chamber and the hydrogen delivery chamber 7 and evacuates the hydrogen and air in the burner;

S2: The ignition gun 61 ignites and a flame is generated;

S3: Air is introduced into the air delivery chamber 2, and hydrogen is introduced into the hydrogen delivery chamber 7, and the air and hydrogen are mixed and burned.

The implementation principle of the method of using a hydrogen-burning low-NOx and CO-emission burner system in Example 2 of the present application is as follows: before each ignition and after each flameout, the hydrogen-burning low-NOx and CO-emission burner system sends the hydrogen gas to the combustion hydrogen delivery pipe 16 The nitrogen is introduced into the combustion air delivery pipe 83, so that the nitrogen can clean the air delivery chamber and the hydrogen delivery chamber 7, and discharge the hydrogen residue in the air delivery chamber and the hydrogen delivery chamber 7, thereby ensuring that the fuel hydrogen is used during the combustion process of the burner system. Precisely proportioned with combustion air to stabilize combustion, better control the oxygen content in the furnace and save energy.

The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application shall be covered by the scope of protection of the present application. Inside.

Claims (9)

1. A hydrogen-fired low NOx, CO-emitting burner system characterized by: the air distribution device comprises a barrel body (1), wherein an air distribution disc (4) is arranged in the barrel body (1), the air distribution disc (4) divides a space in the barrel body (1) into an air conveying cavity (2) and an air mixing cavity (3), a plurality of air outlets (5) are formed in the air distribution disc (4), and an igniter (6) is arranged in the air mixing cavity (3); the hydrogen gas mixing device is characterized in that a hydrogen gas conveying chamber (7) is arranged in the cylinder body (1), a plurality of hydrogen gas conveying pipes (8) are communicated with the hydrogen gas conveying chamber (7), the plurality of hydrogen gas conveying pipes (8) penetrate through the gas distributing disc (4), and the part, penetrating out of the gas distributing disc (4), of the hydrogen gas conveying pipes (8) is located in the gas mixing chamber (3) and provided with a hydrogen gas outlet.

2. A hydrogen-fired low NOx, CO-emitting burner system of claim 1 wherein: the hydrogen conveying pipes (8) comprise at least one first conveying pipe (81) and at least one second conveying pipe (82) which are communicated with the hydrogen conveying chamber (7), the first conveying pipe (81) and the second conveying pipe (82) are mutually parallel and all penetrate through the gas distributing disc (4), the hydrogen outlet comprises a first outlet (9) and a second outlet (10), the first conveying pipe (81) penetrates out of the side part of the gas distributing disc (4) to be provided with a plurality of first outlets (9), and the second conveying pipe (82) penetrates out of the top of the gas distributing disc (4) to be provided with a plurality of second outlets (10).

3. A hydrogen-fired low NOx, CO-emitting burner system according to claim 2, wherein: the plurality of second outlets (10) on top of the second duct (82) are arranged at a plurality of different inclination angles.

4. A hydrogen-fired low NOx, CO-emitting burner system according to claim 2, wherein: the first conveying pipe (81) comprises a conveying pipe (83) and a first conveying head (84), the first outlet (9) is formed in the side part of the first conveying head (84), and the first conveying head (84) is detachably connected with the conveying pipe (83); the second conveying pipe (82) comprises a conveying pipe (83) and a second conveying head (85), the second outlet (10) is formed in the top of the second conveying head (85), and the second conveying head (85) is detachably connected with the conveying pipe (83).

5. A hydrogen-fired low NOx, CO-emitting burner system of claim 1 wherein: the gas distribution plate (4) comprises a fixed seat (41) and a gas distribution plate (42), the fixed seat (41) is fixed in the cylinder body (1), the gas distribution plate (42) is detachably connected with the fixed seat (41), and a plurality of air outlets (5) are formed in the gas distribution plate (42).

6. A hydrogen-fired low NOx, CO-emitting burner system of claim 5 wherein: the hydrogen conveying pipe (8) comprises a conveying pipe (83) communicated with the hydrogen conveying chamber (7), conveying heads are connected to the conveying pipe (83) in a threaded mode, and two sides of the gas distributing plate (42) are respectively abutted to the fixing seat (41) and the conveying heads.

7. A hydrogen-fired low NOx, CO-emitting burner system of claim 1 wherein: the cyclone separation device is characterized in that a cyclone cavity is formed in the middle of the air separation disc (4), a plurality of cyclone plates (14) are arranged in the cyclone cavity along the circumferential direction, the cyclone plates (14) are obliquely arranged, a cyclone channel (13) is formed between every two adjacent cyclone plates (14), and the air conveying cavity (2) and the air mixing cavity (3) are communicated with the cyclone channel (13).

8. A hydrogen-fired low NOx, CO-emitting burner system of claim 1 wherein: the igniter (6) comprises an ignition hydrogen conveying pipe (62) arranged in the middle of the gas distribution disc (4), an ignition gun (61) is arranged in the ignition hydrogen conveying pipe (62), the ignition hydrogen conveying pipe (62) penetrates through the air conveying cavity (2), and an ignition air inlet (15) communicated with the air conveying cavity (2) is formed in the ignition hydrogen conveying pipe (62).

9. A method of using a hydrogen-fired low NOx, CO-emitting burner system employing a hydrogen-fired low NOx, CO-emitting burner system of any of claims 1-8, comprising the steps of:

s1: introducing nitrogen into the air conveying cavity (2) and the hydrogen conveying chamber (7), and cleaning the air conveying chamber and the hydrogen conveying chamber (7) by the nitrogen to empty the hydrogen and the air in the burner;

s2: igniting an igniter (6) and generating flame;

s3: air is introduced into the air conveying cavity (2), hydrogen is introduced into the hydrogen conveying chamber (7), and the air and the hydrogen are mixed for combustion.