Hydrogen and ammonia mixed combustion device

Abstract

The invention provides a hydrogen and ammonia gas mixed combustion device which comprises a combustion chamber, a combustion chamber, a combustion chamber and a combustion chamber, the hydrogen spraying pipe penetrates through the mounting wall, and the output end of the hydrogen spraying pipe is located in the combustion space; the first air spraying pipe is arranged in the hydrogen conveying pipe in a penetrating mode, and the output end of the first air spraying pipe is located in the combustion space and corresponds to the output end of the hydrogen spraying pipe; and the ammonia gas spraying pipe is arranged in the first air spraying pipe in a penetrating mode, and the output end of the ammonia gas spraying pipe is located in the combustion space and corresponds to the output end of the first air spraying pipe. According to the hydrogen and ammonia gas mixed combustion device, the combustion stability of ammonia gas can be improved, the ammonia gas can be combusted more easily under the assistance of combustion-supporting gas, the ignition difficulty of the ammonia gas is reduced, pollutants generated by combustion can be prevented from being increased, and the application range of the ammonia gas serving as carbon-free fuel can be expanded.

Description

Technical Field

[0001] The present disclosure relates to the technical field of burners, and in particular to a hydrogen and ammonia mixed combustion device. Background Art

[0002] Fossil energy such as coal is a non-renewable energy source, and its combustion will produce a large amount of carbon dioxide, which is not conducive to environmental protection. Ammonia, as an efficient carrier of hydrogen, can be used as a carbon-free fuel. However, when ammonia is used as a fuel, it is difficult to ignite and has poor flame stability, which limits its application in practice. Summary of the invention

[0003] The present disclosure aims to solve at least one of the technical problems existing in the prior art or related art.

[0004] In view of this, according to an embodiment of the present disclosure, a hydrogen-ammonia mixed combustion device is proposed, comprising:

[0005] a combustion chamber formed with a combustion space and a mounting wall;

[0006] A hydrogen nozzle is passed through the installation wall, and an output end of the hydrogen nozzle is located in the combustion space;

[0007] A first air nozzle is inserted into the hydrogen delivery pipe, and an output end of the first air nozzle is located in the combustion space and arranged corresponding to an output end of the hydrogen nozzle;

[0008] The ammonia nozzle is inserted into the first air nozzle, and the output end of the ammonia nozzle is located in the combustion space and arranged corresponding to the output end of the first air nozzle.

[0009] In a feasible implementation manner, the hydrogen and ammonia mixed combustion device further comprises:

[0010] A first swirl blade is arranged at the output end of the hydrogen nozzle, and the first swirl blade is located between the hydrogen nozzle and the first air nozzle;

[0011] A second swirl blade is disposed at the output end of the first air nozzle, and the second swirl blade is located between the first air nozzle and the ammonia nozzle;

[0012] A third swirl blade is arranged at the output end of the ammonia nozzle, and the third swirl blade is located inside the ammonia nozzle;

[0013] The hydrogen nozzle, the first air nozzle and the ammonia nozzle are coaxially arranged, the swirl angles of the first swirl blade, the second swirl blade and the third swirl blade are different from each other, and the swirl directions of the second swirl blade and the third swirl blade are opposite.

[0014] In a feasible implementation manner, the swirl angle of the first swirl blade is greater than or equal to 57° and less than or equal to 63°;

[0015] The swirl angle of the second swirl blade is greater than or equal to 42° and less than or equal to 48°;

[0016] A swirl angle of the third swirl blade is greater than or equal to 14° and less than or equal to 16°.

[0017] In a feasible implementation manner, the hydrogen and ammonia mixed combustion device further comprises:

[0018] A first entrainment portion is arranged in the combustion space, the first entrainment portion is formed with a first entrainment port, a first premixing chamber and a gas outlet, the first premixing chamber is connected between the first entrainment port and the gas outlet, the hydrogen nozzle is passed through the first entrainment port, and the output end of the hydrogen nozzle, the output end of the first air nozzle and the output end of the ammonia nozzle are all located in the first premixing chamber;

[0019] A second air nozzle is disposed through the installation wall, and an output end of the second air nozzle is located in the combustion space;

[0020] The conduction direction of the output end of the second air nozzle intersects with the conduction direction of the gas outlet.

[0021] In a feasible embodiment, the first premixing chamber is trapezoidal in shape, the first suction port and the gas outlet are respectively located at two ends of the first premixing chamber in the axial direction, and the cross-sectional area of ​​one end of the first premixing chamber corresponding to the first suction port is smaller than the cross-sectional area of ​​one end of the first premixing chamber corresponding to the gas outlet.

[0022] In a feasible implementation manner, the first entrainment portion is movably disposed in the combustion space, so that the distance between the first entrainment opening and the installation wall is adjustable.

[0023] In a feasible implementation manner, the hydrogen and ammonia mixed combustion device further comprises:

[0024] The smoke exhaust pipe is arranged in the combustion chamber. The combustion chamber is also formed with a smoke exhaust port, which is connected between the combustion space and the smoke exhaust pipe.

[0025] In a feasible implementation manner, the hydrogen and ammonia mixed combustion device further comprises:

[0026] The smoke circulation pipe is connected between the first air nozzle and the smoke exhaust pipe.

[0027] In a feasible implementation manner, the hydrogen and ammonia mixed combustion device further comprises:

[0028] A circulating flue gas nozzle, wherein the input end of the circulating flue gas nozzle is connected to the flue gas circulation pipe, and the output end of the circulating flue gas nozzle is connected to the combustion space;

[0029] The second entrainment portion is arranged in the combustion space, and is formed with a second entrainment port, a second premixing chamber and a circulating smoke gas outlet. The second premixing chamber is connected between the second entrainment port and the circulating smoke gas outlet, and the circulating smoke gas nozzle is passed through the second entrainment port, and the output end of the circulating smoke gas nozzle is located in the second premixing chamber.

[0030] In a feasible implementation, the conduction area of ​​the circulating flue gas outlet is greater than or equal to 1 times the conduction area of ​​the output end of the circulating flue gas nozzle and less than or equal to 3 times the conduction area of ​​the output end of the circulating flue gas nozzle.

[0031] Compared with the prior art, the present disclosure at least includes the following beneficial effects: the hydrogen-ammonia mixed combustion device provided in the embodiment of the present disclosure includes a combustion chamber, a hydrogen nozzle, a first air nozzle and an ammonia nozzle, wherein the hydrogen nozzle, the first air nozzle and the ammonia nozzle are arranged in sequence, the first air nozzle is located between the hydrogen nozzle and the ammonia nozzle, the hydrogen nozzle is penetrated through the installation wall of the combustion chamber, the output ends of each nozzle are located in the combustion space of the combustion chamber and are arranged accordingly, the input ends of the hydrogen nozzle, the first air nozzle and the ammonia nozzle can be respectively connected to the hydrogen supply device, the combustion-supporting gas supply device and the ammonia supply device, so that the hydrogen nozzle, the first air nozzle and the ammonia nozzle can be respectively connected to the hydrogen, the combustion-supporting gas and Ammonia, accordingly, the output ends of the hydrogen nozzle, the first air nozzle and the ammonia nozzle can respectively transport hydrogen, combustion-supporting gas and ammonia into the combustion space. In practical applications, hydrogen and ammonia can be ignited at the output ends of multiple nozzles. Based on the aforementioned arrangement of the hydrogen and ammonia mixed combustion device, hydrogen can easily surround the combustion-supporting gas and ammonia after flowing out of the output end of the hydrogen nozzle. Since hydrogen has good combustion stability and is easier to burn than ammonia, it can have a stabilizing effect on the combustion of ammonia, making ammonia easier to burn with the assistance of combustion-supporting gas, reducing the difficulty of ignition of ammonia, and avoiding the increase of pollutants produced by combustion, which is conducive to expanding the application scope of ammonia as a carbon-free fuel. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the exemplary embodiments below. The accompanying drawings are only for the purpose of illustrating exemplary embodiments and are not to be considered as limiting the present disclosure. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0033] Figure 1 A schematic structural diagram of a hydrogen-ammonia mixed combustion device according to an embodiment of the present disclosure;

[0034] Figure 2 for Figure 1 A schematic partial enlarged view of the middle A area;

[0035] Figure 3 for Figure 1 Schematic partial enlargement of area B.

[0036] in, Figures 1 to 3 The corresponding relationship between the reference numerals and the component names is as follows:

[0037] 11 combustion chamber; 12 hydrogen nozzle; 13 first air nozzle; 14 ammonia nozzle; 15 first swirl blade; 16 second swirl blade; 17 third swirl blade; 18 first entrainment part; 19 second air nozzle; 21 smoke exhaust pipe; 22 smoke circulation pipe; 23 circulating smoke nozzle; 24 second entrainment part;

[0038] 111 combustion space; 112 installation wall;

[0039] 181 first volume suction port; 182 first premixing chamber; 183 gas outlet;

[0040] 241 second smoke inlet; 242 second premixing chamber; 243 circulating smoke outlet. DETAILED DESCRIPTION

[0041] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0042] like Figures 1 to 3 As shown, according to an embodiment of the present disclosure, a hydrogen-ammonia mixed combustion device is proposed, comprising: a combustion chamber 11, which is formed with a combustion space 111 and a mounting wall 112; a hydrogen nozzle 12, which is penetrated through the mounting wall 112, and the output end of the hydrogen nozzle 12 is located in the combustion space 111; a first air nozzle 13, which is penetrated through the hydrogen delivery pipe, and the output end of the first air nozzle 13 is located in the combustion space 111 and is arranged corresponding to the output end of the hydrogen nozzle 12; an ammonia nozzle 14, which is penetrated through the first air nozzle 13, and the output end of the ammonia nozzle 14 is located in the combustion space 111 and is arranged corresponding to the output end of the first air nozzle 13.

[0043] The hydrogen-ammonia mixed combustion device provided by the embodiment of the present disclosure includes a combustion chamber 11, a hydrogen nozzle 12, a first air nozzle 13 and an ammonia nozzle 14, wherein the hydrogen nozzle 12, the first air nozzle 13 and the ammonia nozzle 14 are arranged in sequence, the first air nozzle 13 is located between the hydrogen nozzle 12 and the ammonia nozzle 14, the hydrogen nozzle 12 is penetrated through the installation wall 112 of the combustion chamber 11, the output ends of each nozzle are located in the combustion space 111 of the combustion chamber 11 and are arranged accordingly, the input ends of the hydrogen nozzle 12, the first air nozzle 13 and the ammonia nozzle 14 can be respectively connected to the hydrogen supply device, the combustion-supporting gas supply device and the ammonia supply device, so that the hydrogen nozzle 12, the first air nozzle 13 and the ammonia nozzle 14 can be respectively connected to the hydrogen supply device, the combustion-supporting gas supply device and the ammonia supply device, so that the hydrogen nozzle 12, the first air nozzle 13 and the ammonia nozzle 14 can be respectively connected to the hydrogen , combustion-supporting gas and ammonia. Accordingly, the output ends of the hydrogen nozzle 12, the first air nozzle 13 and the ammonia nozzle 14 can respectively transport hydrogen, combustion-supporting gas and ammonia into the combustion space 111. In actual applications, hydrogen and ammonia can be ignited at the output ends of multiple nozzles. Based on the aforementioned arrangement of the hydrogen and ammonia mixed combustion device, hydrogen can easily surround the combustion-supporting gas and ammonia after flowing out of the output end of the hydrogen nozzle 12. Since hydrogen has good combustion stability and is easier to burn than ammonia, it can have a stabilizing effect on the combustion of ammonia, making it easier for ammonia to burn with the assistance of combustion-supporting gas, reducing the difficulty of ignition of ammonia, and avoiding the increase of pollutants produced by combustion, which is conducive to expanding the application scope of ammonia as a carbon-free fuel.

[0044] It can be understood that the aforementioned combustion-supporting gas can be but is not limited to air, oxygen and other gases.

[0045] It is understandable that if Figure 1 and Figure 2 As shown, the output end of the first air nozzle 13 is arranged corresponding to the output end of the hydrogen nozzle 12, and the output end of the first air nozzle 13 can be arranged flush with the output end of the hydrogen nozzle 12; similarly, the output end of the ammonia nozzle 14 is arranged corresponding to the output end of the first air nozzle 13, and the output end of the ammonia nozzle 14 can be arranged flush with the output end of the first air nozzle 13. In practical applications, the hydrogen nozzle 12, the first air nozzle 13 and the ammonia nozzle 14 can all be arranged perpendicular to the installation wall 112 and corresponding to the middle of the installation wall 112, so as to help improve the temperature uniformity in the combustion space 111.

[0046] It is understandable that if Figure 1 and Figure 2As shown, a gap is formed between the inner circumferential wall of the hydrogen nozzle 12 and the outer circumferential wall of the first air nozzle 13, and hydrogen can flow through the gap between the inner circumferential wall of the hydrogen nozzle 12 and the outer circumferential wall of the first air nozzle 13; similarly, a gap is formed between the inner circumferential wall of the first air nozzle 13 and the outer circumferential wall of the ammonia nozzle 14, and the combustion-supporting gas can flow through the gap between the inner circumferential wall of the first air nozzle 13 and the outer circumferential wall of the ammonia nozzle 14.

[0047] It is understandable that if Figure 1 and Figure 2 As shown, each nozzle may include an input pipe section and an output pipe section. The output pipe sections of the aforementioned nozzles may be arranged in sequence. The positional relationship between the input pipe sections of the aforementioned nozzles may be set according to actual needs, and no excessive restrictions are made here.

[0048] In some feasible examples, the diameter of the output end of the first air nozzle 13 is 1.5 to 3 times the diameter of the output end of the ammonia nozzle 14, and the diameter of the output end of the hydrogen nozzle 12 is 1.5 to 3 times the diameter of the output end of the first air nozzle 13. In practical applications, the outlet flow rates of the ammonia nozzle 14, the first air nozzle 13, and the hydrogen nozzle 12 can be set to 8 m / s to 30 m / s. Taking the case where the combustion-supporting gas is air as an example, the fuel-air equivalence ratio of the gas output by each nozzle can also be set to be greater than 1.2, so that the area near the output end of each nozzle is a fuel-rich area, which is beneficial to reduce fuel-type NO x production, reducing NO and N2O emissions.

[0049] like Figure 2 As shown, in some examples, the hydrogen-ammonia mixed combustion device also includes: a first swirl blade 15, which is arranged at the output end of the hydrogen nozzle 12, and the first swirl blade 15 is located between the hydrogen nozzle 12 and the first air nozzle 13; a second swirl blade 16, which is arranged at the output end of the first air nozzle 13, and the second swirl blade 16 is located between the first air nozzle 13 and the ammonia nozzle 14; a third swirl blade 17, which is arranged at the output end of the ammonia nozzle 14, and the third swirl blade 17 is located in the ammonia nozzle 14; wherein the hydrogen nozzle 12, the first air nozzle 13 and the ammonia nozzle 14 are coaxially arranged, and the swirl angles of the first swirl blade 15, the second swirl blade 16 and the third swirl blade 17 are different from each other, and the rotation directions of the second swirl blade 16 and the third swirl blade 17 are opposite.

[0050] In this technical solution, the first swirl blade 15, the second swirl blade 16 and the third swirl blade 17 can respectively output hydrogen, combustion-supporting gas and ammonia in the form of a swirl state relative to the axis of the nozzle, which is beneficial to strengthen the mixing of hydrogen, combustion-supporting gas and ammonia, and form a swirl flame at the output end of each nozzle during the combustion process. The ammonia and combustion-supporting gas can also rotate in opposite directions during the flow process, thereby facilitating a more complete mixing of ammonia and combustion-supporting gas, and further improving the combustion stability and combustion efficiency of ammonia.

[0051] It can be understood that the aforementioned swirl angle refers to the angle between the air outlet direction of the swirl blade and the axial direction of the corresponding nozzle.

[0052] In some feasible examples, the first swirl blade 15 and the second swirl blade 16 have the same swirl direction, so that the mixing degree of hydrogen and combustion-supporting gas can be controlled, which is convenient for reducing the combustion rate of hydrogen and is beneficial to saving hydrogen consumption.

[0053] In some examples, the swirl angle of the first swirl blade 15 is greater than or equal to 57° and less than or equal to 63°; the swirl angle of the second swirl blade 16 is greater than or equal to 42° and less than or equal to 48°; the swirl angle of the third swirl blade 17 is greater than or equal to 14° and less than or equal to 16°.

[0054] In this technical solution, the swirl angle of each swirl blade is constrained. Based on the above settings, the mixing effect of hydrogen, combustion-supporting gas and ammonia can be further enhanced, providing a more reliable guarantee for the stable combustion of ammonia.

[0055] Exemplarily, the swirl angle of the first swirl blade 15 may be but not limited to 58°, 60° or 62°, etc.; the swirl angle of the second swirl blade 16 may be but not limited to 43°, 45° or 47°, etc.; the swirl angle of the third swirl blade 17 may be but not limited to 14.5°, 15° or 15.5°, etc.

[0056] In some feasible examples, the number of the first swirl blades 15, the second swirl blades 16 and the third swirl blades 17 are all multiple, the multiple first swirl blades 15 are evenly arranged along the circumference of the hydrogen nozzle 12, the multiple second swirl blades 16 are evenly arranged along the circumference of the first air nozzle 13, and the multiple third swirl blades 17 are evenly arranged along the circumference of the ammonia nozzle 14.

[0057] like Figure 1 and Figure 2As shown, in some examples, the hydrogen-ammonia mixed combustion device also includes: a first entrainment portion 18, which is arranged in the combustion space 111, the first entrainment portion 18 is formed with a first entrainment port 181, a first premixing chamber 182 and a gas outlet 183, the first premixing chamber 182 is connected between the first entrainment port 181 and the gas outlet 183, the hydrogen nozzle 12 is penetrated through the first entrainment port 181, and the output end of the hydrogen nozzle 12, the output end of the first air nozzle 13 and the output end of the ammonia nozzle 14 are all located in the first premixing chamber 182; the second air nozzle 19 is penetrated through the installation wall 112, and the output end of the second air nozzle 19 is located in the combustion space 111; wherein, the conduction direction of the output end of the second air nozzle 19 intersects with the conduction direction of the gas outlet 183.

[0058] In this technical solution, the hydrogen-ammonia mixed combustion device is capable of flameless combustion of hydrogen and ammonia; accordingly, the aforementioned first premixing chamber 182 can be used as the main combustion zone in the combustion space 111. After hydrogen, combustion-supporting gas and ammonia are input into the combustion space 111 through corresponding nozzles, they can be mixed and burned with flames in the first premixing chamber 182 first. The smoke generated by the combustion and the incompletely burned gas can be discharged from the first premixing chamber 182 through the gas outlet 183 of the first suction part 18. In addition, the flow rate of hydrogen, combustion-supporting gas and ammonia is relatively high during the transportation process, which is easy to form a negative pressure near the first suction port 181, and then the gas outside the first premixing chamber 182 is inhaled, which is beneficial to further enhance the gas mixing in the first premixing chamber 182, and provide a more reliable guarantee for the stable combustion of ammonia. It can also dilute the hydrogen in the first premixing chamber 182 and reduce the combustion rate of hydrogen. At the same time, it is beneficial to the gas flow in the combustion space 111, avoiding the occurrence of local high-temperature areas in the combustion space 111, and can improve the safety of the combustion device. When the temperature in the combustion space 111 reaches the flameless combustion condition of hydrogen and ammonia, the second air nozzle 19 can further provide combustion-supporting gas into the combustion space 111 to entrain the flue gas in the combustion space 111, so that hydrogen and ammonia can be flamelessly burned in the combustion space 111 outside the first premixing chamber 182, which is beneficial to further reduce NO x The generation amount can improve the cleanliness and environmental protection of the combustion device.

[0059] It can be understood that the input end of the second air nozzle 19 can be connected to the combustion-supporting gas supply device, and the combustion-supporting gas transported by the second air nozzle can be but is not limited to air or oxygen.

[0060] In some feasible examples, the diameter of the second air nozzle 19 is 0.25 to 0.5 times the diameter of the first air nozzle 13, and the conduction direction of the output end of the second air nozzle 19 is at an angle of 4 to 6 degrees to the conduction direction of the gas outlet 183. In the flameless combustion stage, the outlet flow velocity of the second air nozzle 19 can be set to be greater than 80 m / s to ensure the momentum of the combustion-supporting gas sprayed by the secondary air nozzle, so that the secondary air can draw in a large amount of flue gas after entering the combustion chamber 11 to achieve flameless combustion of hydrogen and ammonia.

[0061] Exemplarily, the conducting direction of the output end of the second air nozzle 19 and the conducting direction of the gas outlet 183 form an angle of 5°.

[0062] like Figure 2 As shown, in some examples, the first premixing chamber 182 is trapezoidal in shape, the first entrainment port 181 and the gas outlet 183 are respectively located at two ends of the first premixing chamber 182 in the axial direction, and the cross-sectional area of ​​one end of the first premixing chamber 182 corresponding to the first entrainment port 181 is smaller than the cross-sectional area of ​​one end of the first premixing chamber 182 corresponding to the gas outlet 183.

[0063] In this technical solution, the first premixing chamber 182 can be arranged in a trapezoidal shape, the first suction port 181 is connected to the end of the first premixing chamber 182 with a smaller axial cross-sectional area, and the gas outlet 183 is connected to the end of the first premixing chamber 182 with a larger axial cross-sectional area. Based on the above arrangement, it is possible to increase the volume of the first premixing chamber 182 while avoiding that the space of the first premixing chamber 182 corresponding to the output end of the hydrogen nozzle 12 is too wide, thereby improving the mixing effect of ammonia and combustion-supporting gas, enhancing the combustion stability of ammonia, preventing the output end of the hydrogen nozzle 12 from being de-ignited, and improving the stability of the flame.

[0064] In some feasible examples, the aforementioned mounting wall 112 is square, the first premixing chamber 182 is truncated cone-shaped, the minimum diameter of the first premixing chamber 182 is 1 / 8 to 1 / 6 of the width of the mounting wall 112, the maximum diameter of the first premixing chamber 182 is 1 / 5 to 1 / 3 of the width of the mounting wall 112, and the axial length of the first premixing chamber 182 is 1 / 8 to 1 / 5 of the length of the combustion space 111 in the axial direction of the first premixing chamber 182.

[0065] It is understandable that the aforementioned installation wall 112 may also be in other shapes, and the aforementioned first premixing chamber 182 is not limited to a truncated cone shape and may also be a cone shape in other forms. Accordingly, the size relationship between the small cross-section end of the first premixing chamber 182 in the axial direction and the installation wall 112 can be equivalently converted in combination with the aforementioned diameter ratio range and the specific shapes of the first premixing chamber 182 and the installation wall 112, for example, it can be converted into an area ratio relationship. Exemplarily, the area of ​​the small cross-section end of the first premixing chamber 182 in the axial direction can be set to 0.012 times to 0.022 times the area of ​​the installation wall 112, and the area of ​​the large cross-section end of the first premixing chamber 182 in the axial direction can be set to 0.0314 times to 0.0872 times the area of ​​the installation wall 112.

[0066] In some feasible examples, the first premixing chamber 182 , the hydrogen nozzle 12 , the first air nozzle 13 , and the ammonia nozzle 14 are coaxially arranged.

[0067] In some examples, the first entrainment portion 18 is movably disposed in the combustion space 111 , so that the distance between the first entrainment opening 181 and the mounting wall 112 is adjustable.

[0068] In this technical solution, the openness of the space near the first suction port 181 can be changed by adjusting the distance between the first suction port 181 and the mounting wall 112, which is beneficial for adjusting the flow rate of the first suction port 181 and the degree of gas mixing in the first premixing chamber 182, and is beneficial for controlling the reaction rate of hydrogen. While avoiding local high temperature caused by excessively fast hydrogen reaction rate, the heat generated by the combustion of hydrogen is beneficial for maintaining the stable combustion of ammonia.

[0069] like Figure 1 As shown, in some examples, the hydrogen-ammonia mixed combustion device further includes: a smoke exhaust pipe 21 disposed in the combustion chamber 11 , and the combustion chamber 11 also forms a smoke exhaust port, which is connected between the combustion space 111 and the smoke exhaust pipe 21 .

[0070] In this technical solution, the hydrogen and ammonia mixed combustion device can use the smoke exhaust pipe 21 to discharge the smoke in the combustion chamber 11, which is beneficial to improving the convenience and safety of the combustion device.

[0071] like Figure 1 As shown, in some feasible examples, the combustion chamber 11 is also formed with a connecting wall, which is arranged opposite to the mounting wall 112, and the aforementioned smoke exhaust port and the aforementioned smoke exhaust pipe 21 are located on the aforementioned connecting wall, thereby extending the distance between the smoke exhaust pipe 21 and the output end of the hydrogen nozzle 12, which is beneficial to reducing the risk of fuel gas being discharged through the smoke exhaust pipe 21.

[0072] like Figure 1 and Figure 3As shown, in some examples, the hydrogen-ammonia mixed combustion device further includes: a flue gas circulation pipe 22 connected between the first air nozzle 13 and the smoke exhaust pipe 21 .

[0073] In this technical solution, the hydrogen and ammonia mixed combustion device can use the flue gas circulation pipe 22 to transport at least part of the flue gas discharged from the combustion space 111 to the first air nozzle 13. Accordingly, the first air nozzle 13 can re-input the flue gas into the combustion space 111, which is beneficial to further dilute the concentration of hydrogen, reduce the combustion rate of hydrogen, and reduce the consumption of hydrogen.

[0074] It can be understood that the smoke exhaust pipe 21 can have a first smoke exhaust port and a second smoke exhaust port, wherein the input end of the smoke circulation pipe 22 is connected to the second smoke exhaust port, and the first smoke exhaust port can be used to connect to the smoke treatment device. The first air nozzle 13 can have a first air inlet and a second air inlet, wherein the first air inlet can be used to connect to the combustion-supporting gas supply device, and the smoke circulation pipe 22 can be connected to the second air inlet.

[0075] like Figure 1 and Figure 3 As shown, in some examples, the hydrogen-ammonia mixed combustion device also includes: a circulating flue gas nozzle 23, the input end of the circulating flue gas nozzle 23 is connected to the flue gas circulation pipe 22, and the output end of the circulating flue gas nozzle 23 is connected to the combustion space 111; a second suction portion 24, which is arranged in the combustion space 111, and the second suction portion 24 is formed with a second suction port 241, a second premixing chamber 242 and a circulating flue gas outlet 243, the second premixing chamber 242 is connected between the second suction port 241 and the circulating flue gas outlet 243, the circulating flue gas nozzle 23 is penetrated by the second suction port 241 and the output end of the circulating flue gas nozzle 23 is located in the second premixing chamber 242.

[0076] In this technical solution, part of the flue gas in the flue gas circulation pipe 22 can be transported to the second premixing chamber 242 of the second entrainment part 24 through the circulating flue gas nozzle 23, and can be re-input into the combustion space 111 through the circulating flue gas outlet 243 of the second entrainment part 24. The flue gas has a high flow rate during the process of being transported to the second premixing chamber 242, which can easily form a negative pressure near the second entrainment port 241, and then inhale the gas outside the second premixing chamber 242. On the one hand, it can further enhance the gas flow in the combustion space 111 and avoid the formation of local high temperature areas in the combustion space 111; on the other hand, during the flameless combustion process, the flue gas output by the second entrainment part 24 can further dilute the hydrogen in the combustion space 111, which is beneficial to reducing the combustion efficiency of hydrogen and facilitating the flameless combustion of hydrogen and ammonia.

[0077] In some feasible examples, the circulating flue gas nozzle 23 is arranged perpendicular to the side wall of the combustion chamber 11 .

[0078] In some feasible examples, the second premixing chamber 242 is cylindrical and is coaxially arranged with the circulating flue gas nozzle 23, and the second entrainment port 241 and the circulating flue gas outlet 243 are respectively located at two ends of the axial direction of the second premixing chamber 242. When the mounting wall 112 is square, the diameter of the second premixing chamber 242 is 1 / 15 to 1 / 10 of the width of the mounting wall 112, and the axial length of the second premixing chamber 242 is 1 / 15 to 1 / 10 of the length of the combustion space 111 in the conducting direction of the aforementioned gas outlet 183, which is conducive to improving the gas circulation effect in the combustion space 111 and avoiding excessive flue gas concentration in the main combustion zone during flameless combustion.

[0079] In some examples, the conduction area of ​​the circulating flue gas outlet 243 is greater than or equal to 1 times the conduction area of ​​the output end of the circulating flue gas nozzle 23 and less than or equal to 3 times the conduction area of ​​the output end of the circulating flue gas nozzle 23 .

[0080] In this technical solution, the proportional relationship between the conduction area of ​​the circulating smoke outlet 243 and the conduction area of ​​the output end of the circulating smoke nozzle 23 is constrained, which can reduce the loss of jet momentum of the circulating smoke outlet 243, thereby ensuring that the jet ejected from the circulating smoke outlet 243 can maintain a high momentum, which is conducive to the formation of flameless combustion in the combustion space 111.

[0081] In the present disclosure, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise expressly defined. The terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to the specific circumstances.

[0082] In the description of the present disclosure, it is necessary to understand that the directions or positional relationships indicated by the terms "up", "down", "left", "right", "front", "back", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be understood as a limitation on the present disclosure.

[0083] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0084] The above are only preferred embodiments of the present disclosure and are not intended to limit the present disclosure. For those skilled in the art, the present disclosure may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A hydrogen and ammonia mixed combustion device, characterized in that: include: a combustion chamber formed with a combustion space and a mounting wall; A hydrogen nozzle is disposed through the installation wall, and an output end of the hydrogen nozzle is located in the combustion space; A first air nozzle is inserted into the hydrogen delivery pipe, wherein an output end of the first air nozzle is located in the combustion space and is arranged corresponding to an output end of the hydrogen nozzle; An ammonia nozzle is inserted into the first air nozzle, and an output end of the ammonia nozzle is located in the combustion space and arranged corresponding to the output end of the first air nozzle.

2. The hydrogen and ammonia mixed combustion device according to claim 1, characterized in that: Also includes: A first swirl blade is provided at the output end of the hydrogen nozzle, and the first swirl blade is located between the hydrogen nozzle and the first air nozzle; a second swirl blade, disposed at an output end of the first air nozzle, the second swirl blade being located between the first air nozzle and the ammonia nozzle; A third swirl blade is arranged at the output end of the ammonia nozzle, and the third swirl blade is located inside the ammonia nozzle; The hydrogen nozzle, the first air nozzle and the ammonia nozzle are coaxially arranged, the swirl angles of the first swirl blade, the second swirl blade and the third swirl blade are different from each other, and the swirl directions of the second swirl blade and the third swirl blade are opposite.

3. The hydrogen and ammonia mixed combustion device according to claim 2, characterized in that: The swirl angle of the first swirl blade is greater than or equal to 57° and less than or equal to 63°; The swirl angle of the second swirl blade is greater than or equal to 42° and less than or equal to 48°; The swirl angle of the third swirl blade is greater than or equal to 14° and less than or equal to 16°.

4. The hydrogen-ammonia mixed combustion device according to claim 1, characterized in that: Also includes: a first entrainment portion, arranged in the combustion space, the first entrainment portion being formed with a first entrainment port, a first premixing chamber and a gas outlet, the first premixing chamber being connected between the first entrainment port and the gas outlet, the hydrogen nozzle being arranged through the first entrainment port, and the output end of the hydrogen nozzle, the output end of the first air nozzle and the output end of the ammonia nozzle being all located in the first premixing chamber; A second air nozzle is disposed through the installation wall, and an output end of the second air nozzle is located in the combustion space; Wherein, the conducting direction of the output end of the second air nozzle intersects with the conducting direction of the gas outlet.

5. The hydrogen-ammonia mixed combustion device according to claim 4, characterized in that: The first premixing chamber is in a trapezoidal shape, the first suction port and the gas outlet are respectively located at two ends of the first premixing chamber in an axial direction, and a cross-sectional area of ​​one end of the first premixing chamber corresponding to the first suction port is smaller than a cross-sectional area of ​​one end of the first premixing chamber corresponding to the gas outlet.

6. The hydrogen-ammonia mixed combustion device according to claim 4, characterized in that: The first entrainment portion is movably disposed in the combustion space so that the distance between the first entrainment opening and the installation wall can be adjusted.

7. The hydrogen-ammonia mixed combustion device according to any one of claims 1 to 6, characterized in that: Also includes: A smoke exhaust pipe is arranged in the combustion chamber. The combustion chamber is also formed with a smoke exhaust port, and the smoke exhaust port is connected between the combustion space and the smoke exhaust pipe.

8. The hydrogen-ammonia mixed combustion device according to claim 7, characterized in that: Also includes: The smoke circulation pipe is connected between the first air nozzle and the smoke exhaust pipe.

9. The hydrogen and ammonia mixed combustion device according to claim 8, characterized in that: Also includes: A circulating flue gas nozzle, wherein the input end of the circulating flue gas nozzle is connected to the flue gas circulation pipe, and the output end of the circulating flue gas nozzle is connected to the combustion space; The second entrainment portion is arranged in the combustion space, and the second entrainment portion is formed with a second entrainment port, a second premixing chamber and a circulating smoke gas outlet. The second premixing chamber is connected between the second entrainment port and the circulating smoke gas outlet, and the circulating smoke gas nozzle is penetrated through the second entrainment port and the output end of the circulating smoke gas nozzle is located in the second premixing chamber.

10. The hydrogen and ammonia mixed combustion device according to claim 9, characterized in that: The conduction area of ​​the circulating flue gas outlet is greater than or equal to 1 times the conduction area of ​​the output end of the circulating flue gas nozzle and less than or equal to 3 times the conduction area of ​​the output end of the circulating flue gas nozzle.

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