Ammonia gas inlet adjusting device for ammonia coal combustion boiler

Abstract

The invention provides an ammonia gas inlet adjusting device for an ammonia coal combustion boiler, which comprises a gas inlet pipe, one end of the gas inlet pipe is provided with a regulation and control mechanism for changing the angle of a blade, and one end of the regulation and control mechanism is provided with a gas ejector pipe for conveying gas into the boiler. A gas outlet of the gas spraying pipe is provided with a mixing mechanism for fully mixing ammonia gas and oxygen; the regulation and control mechanism comprises a connecting pipe, an air inlet pipe is installed at one end of the connecting pipe, a cylinder is installed in the connecting pipe, and an air bag is installed at the bottom end of the cylinder. The interior of the barrel is slidably connected with a piston, and the interior of the barrel is divided into a first storage chamber and a second storage chamber by the piston; a pressure adjusting mechanism used for adjusting the pressure in the first storage chamber and the pressure in the second storage chamber is installed on one side of the regulating and controlling mechanism. The ammonia gas inlet adjusting device for the ammonia coal combustion boiler, provided by the invention, has the advantage of uniformly mixing ammonia gas and oxygen by adjusting the angle of the blade according to the flow rate of the ammonia gas.

Description

Technical Field

[0001] The invention relates to the technical field of ammonia coal combustion, and in particular to an ammonia gas intake regulating device for an ammonia coal combustion boiler. Background Art

[0002] Mixed ammonia combustion is a new technology route for carbon reduction in coal-fired power units: mixed ammonia combustion is a technology that mixes a certain proportion of ammonia into coal-fired power units and combines it with coal as a mixed fuel to support combustion. The use of ammonia as a fuel has the advantages of zero carbon emissions during the combustion process, easy storage and good explosion-proof properties. At the same time, compared with other types of carbon emission reduction technologies for coal-fired power units, the cost of mixed ammonia combustion modification is low. Mixed ammonia combustion in coal-fired boilers has little impact on the operation of the unit, and fuel burnout and nitrogen oxide emissions are better than coal-fired conditions. Existing coal-fired units only need to transform the mixed ammonia combustion system, and the main structure and heating surface of the boiler do not need to be significantly modified.

[0003] The explosion limit of ammonia is about 15% to 28%. The flow rate of ammonia at the outlet of the boiler will affect the uniformity of its mixing with the air. If the flow rate is too fast, it may cause uneven distribution of ammonia in the air, making the local concentration too high and increasing the risk of ammonia explosion. On the contrary, if the flow rate is too slow, ammonia will accumulate at the boiler outlet, making it difficult for ammonia to burn and ignite.

[0004] In the prior art, a turbine is provided at the air outlet to make the ammonia-air mixing more complete and uniform. However, the blade angle of the turbine significantly affects the ammonia concentration and velocity distribution at the air outlet. When the boiler is in use, the internal temperature must be adjusted or the ammonia-coal ratio must be changed according to demand, resulting in the flow rate of ammonia entering the boiler constantly changing. The blade angle of the turbine for mixing ammonia is fixed, and the blade angle cannot be changed according to the ammonia flow rate, resulting in the disadvantage that ammonia and oxygen cannot be fully mixed.

[0005] Therefore, it is necessary to provide a new ammonia coal combustion boiler ammonia intake regulating device to solve the above problems. Summary of the invention

[0006] The technical problem solved by the present invention is to provide an ammonia intake regulating device for an ammonia coal combustion boiler, which can adjust the blade angle according to the ammonia flow rate to make the ammonia and oxygen mix evenly.

[0007] To solve the above technical problems, the ammonia intake regulating device for an ammonia-coal combustion boiler provided by the present invention includes: an intake pipe, one end of the intake pipe is installed with a regulating mechanism for changing the blade angle, one end of the regulating mechanism is installed with a jet pipe for delivering gas into the boiler, and a mixing mechanism for fully mixing ammonia and oxygen is installed at the air outlet of the jet pipe; the regulating mechanism includes a connecting pipe, one end of the connecting pipe is installed with the intake pipe, and a cylinder body is installed inside the connecting pipe, an airbag is installed at the bottom end of the cylinder body, and part of the airbag is located inside the cylinder body; a piston is slidably connected inside the cylinder body, and the inside of the cylinder body is divided into two spaces, a first storage chamber and a second storage chamber, by the piston; a lifting rod and a first spring are installed on the surface of the piston, and a sealing ring is installed at the connection between the lifting rod and the cylinder body; the top end of the first spring abuts against the inner side wall of the cylinder body; a plurality of magnetic rings are installed on the inner side wall of the cylinder body, and an annular card slot is provided inside the magnetic ring; a plurality of magnets are slidably connected inside the piston, the magnets are engaged with the card slot and adsorbed to the magnetic ring, and one end of the magnet is in a hemispherical structure; a plurality of second springs are installed inside the piston, and one end of the second spring is connected to the magnet; a pressure regulating mechanism for adjusting the internal pressure of the first storage chamber and the second storage chamber is installed on one side of the regulating mechanism; the mixing mechanism includes a turbine disc, a cylindrical adjusting block is slidably connected inside the turbine disc, and the adjusting block is fixedly connected to the lifting rod; a plurality of clamping balls are fixedly connected to the side wall of the adjusting block, and the clamping balls are slidably connected inside the clamping plate; a plurality of rotating shafts are rotatably connected inside the turbine disc, one end of the rotating shaft is fixedly connected to the middle of the side wall of the clamping plate, the clamping plate is inclined inside the turbine disc, and the other end of the rotating shaft is fixedly connected to the blade.

[0008] Preferably, one end of the intake pipe connected to the connecting pipe is in a funnel shape, and a flow meter is installed on the side wall of the intake pipe.

[0009] Preferably, a mounting plate with a funnel-shaped interior is installed at the connection between the connecting pipe and the cylinder body, the airbag is connected to the inner side wall of the mounting plate, and the inner bottom surface of the connecting pipe is in an arc structure.

[0010] Preferably, an observation window is provided on the side wall of the cylinder body, and the observation window is aligned with the magnetic ring.

[0011] Preferably, a plurality of limiting blocks are installed inside the cylinder body, the limiting blocks abut against the side wall of the piston, and the height of the piston is greater than the height of the magnetic ring.

[0012] Preferably, the pressure regulating mechanism includes a compression cylinder. The first storage chamber and the second storage chamber are respectively communicated with the compression cylinder through hoses. The first storage chamber is communicated with the airbag. Pressure gauges and connectors are respectively installed on the side walls of the hoses, and valves are installed on the side walls of the connectors. A compression plug is slidably connected inside the compression cylinder. One end of the compression plug is provided with a screw rod, and the screw rod is in threaded connection with the compression cylinder.

[0013] Preferably, the connecting pipe and the jet pipe are connected through a communicating pipe with an arc-shaped side wall, and a deflector with an arc-shaped side wall is installed inside the jet pipe.

[0014] Preferably, a fixing ring is installed on the side wall of the lifting rod, and a plurality of through holes are obliquely arranged on the side wall of the fixing ring. The fixing ring is located inside the jet pipe, and the inside of the jet pipe is of a hollow frustum-shaped structure.

[0015] Preferably, bearings are installed at the bottom ends of the turbine disc and the adjusting block, and the bearings are installed inside the bearing sleeves. The bearing sleeve at the bottom end of the adjusting block is fixedly connected to the lifting rod, and the bearing sleeve on the side wall of the turbine disc is installed inside the jet pipe.

[0016] Preferably, a hexagonal prism is fixedly connected to the top end of the adjusting block, and the hexagonal prism is engaged and slidably connected inside the turbine disc.

[0017] Compared with the related art, the ammonia intake regulating device for an ammonia-coal combustion boiler provided by the present invention has the following beneficial effects: The present invention provides an ammonia intake regulating device for an ammonia-coal combustion boiler. When the flow rate of ammonia and oxygen inside the intake pipe is less than 10 m / s, during the gas flow inside the connecting pipe, the airbag is squeezed, the pressure inside the first storage chamber increases, and the thrust on the piston increases. At this time, the magnet on the side wall of the piston adsorbs the lowermost one of the magnetic rings to fix the piston and prevent the piston and the lifting rod from moving upward. At this time, the angle between the blade and the turbine disk is 30°, and the rotation of the blade makes the air flow organization at the outlet of the air injection pipe more uniform, which is beneficial to combustion. When the flow rate of ammonia and oxygen inside the intake pipe is between 10 m / s and 30 m / s, the flow rate inside the connecting pipe increases, and the extrusion force on the airbag with an arc-shaped side wall increases accordingly. The airbag shrinks, and the internal gas flushes into the first storage chamber. The pressure inside the first storage chamber increases, and the thrust on the piston increases. At this time, the thrust on the piston is greater than the resistance of the piston's movement. At this time, the piston moves upward, the magnet is squeezed into the piston to compress the second spring, and the magnet is separated from the card slot, facilitating the upward movement of the piston. After the magnet is separated from the magnetic ring, the adsorption force between the two decreases, and the resistance of the piston decreases, facilitating the piston to overcome the resistance and continue to move. When the piston moves to the middle position of the second magnetic ring, the magnet aligns with the card slot, and the second spring pushes the magnet into the card slot, and the magnet adsorbs the magnetic ring. The resistance of the piston suddenly increases, and the piston is stuck on the magnetic ring in the middle position. At this time, the piston drives the lifting rod to move upward, the lifting rod drives the clamping ball to move upward, and the clamping ball moves vertically inside the inclined clamping plate, thereby pushing the clamping plate, the rotating shaft, and the blade to rotate, making the blade rotate 15°. At this time, the angle between the blade and the turbine disk is 45°, and the rotation of the blade makes the air flow organization at the outlet of the air injection pipe more uniform, which is beneficial to combustion. When the flow rate of ammonia and oxygen is greater than 30 m / s, similarly, the piston is again pushed upward to adsorb on the inner side wall of the uppermost magnetic ring, and the lifting rod is continuously pushed upward to make the blade rotate. At this time, the angle between the blade and the turbine disk is 60°, and the rotation of the blade makes the air flow organization at the outlet of the air injection pipe more uniform, which is beneficial to combustion. When ammonia and oxygen enter the boiler through the air injection pipe, the angle of the blade can be adjusted according to the gas flow rate, so that ammonia and oxygen are evenly mixed at the outlet, avoiding ammonia accumulation and being beneficial to the rapid combustion of ammonia. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 FIG. is a schematic structural diagram of a preferred embodiment of the ammonia intake regulating device for an ammonia-coal combustion boiler provided by the present invention; Figure 2 isFigure 1 Schematic diagram of the internal structure of the shown control mechanism; Figure 3 is Figure 2 Enlarged schematic diagram of the structure at position A shown; Figure 4 is Figure 2 Enlarged schematic diagram of the structure at position B shown; Figure 5 is Figure 4 Bottom view of the internal structure of the shown adjusting block; Figure 6 is Figure 2 Schematic diagram of the structure of the clamping ball and the clamping plate shown; Figure 7 is Figure 4 Top view of the structure of the shown fixing ring; Figure 8 Schematic diagram of the blade angle of 30° provided by the present invention; Figure 9 Schematic diagram of the blade angle of 45° provided by the present invention; Figure 10 Schematic diagram of the blade angle of 60° provided by the present invention; Figure 11 Schematic diagram of the ammonia concentration distribution at the air outlet under the conditions of various blade angles and various flow rates of fuel ammonia NH3; Figure 12 Schematic diagram of the air velocity at the air outlet under the conditions of various blade angles and various flow rates of fuel ammonia NH3; Figure 13 Schematic diagram of the air flow trajectory and direction at the air outlet under the conditions of various blade angles and various flow rates of fuel ammonia NH3.

[0019] Reference numerals in the figure: 1, intake pipe; 11, flow meter; 2, control mechanism; 21, connecting pipe; 22, cylinder body; 23, observation window; 24, mounting plate; 25, airbag; 26, piston; 27, first spring; 28, lifting rod; 29, sealing ring; 210, first storage chamber; 211, second storage chamber; 212, limiting block; 213, magnetic ring; 214, card slot; 215, magnet; 216, second spring; 3, jet pipe; 31, communicating pipe; 32, deflector; 4, pressure regulating mechanism; 41, compression cylinder; 42, pressure gauge; 43, joint; 44, valve; 45, hose; 46, compression plug; 47, screw; 5, fixing ring; 51, through hole; 6, mixing mechanism; 61, turbine disc; 62, blade; 63, rotating shaft; 64, bearing; 65, bearing sleeve; 66, clamping ball; 67, adjusting block; 68, hexagonal prism; 69, clamping plate. Detailed implementation manners

[0020] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0021] Please refer to Figures 1 to 10 , Figure 1 , which is a schematic structural diagram of a preferred embodiment of the ammonia intake regulating device for an ammonia-coal combustion boiler provided by the present invention; Figure 2 is Figure 1 a schematic internal structure diagram of the regulating mechanism shown in Figure 3 is Figure 2 a schematic enlarged view of the structure at A shown in Figure 4 is Figure 2 a schematic enlarged view of the structure at B shown in Figure 5 is Figure 4 a schematic bottom view of the internal structure of the adjusting block shown in Figure 6 is Figure 2 a schematic diagram of the structure of the clamping ball and the clamping plate shown in Figure 7 is Figure 4 a schematic top view of the structure of the fixing ring shown in Figure 8 is a schematic diagram of the present invention with a blade angle of 30°; Figure 9 is a schematic diagram of the present invention with a blade angle of 45°; Figure 10 is a schematic diagram of the present invention with a blade angle of 60°. The ammonia intake regulating device for the ammonia-coal combustion boiler includes: an intake pipe 1, one end of the intake pipe 1 connected to the connecting pipe 21 is funnel-shaped, and a flow meter 11 is installed on the side wall of the intake pipe 1. In order to facilitate the delivery of ammonia and oxygen into the boiler through the intake pipe 1, and the flow meter 11 records the flow rate of the gas inside the intake pipe 1.

[0022] One side of the regulating mechanism 2 is installed with a pressure regulating mechanism 4 for regulating the internal pressure of the first storage chamber 210 and the second storage chamber 211. The pressure regulating mechanism 4 includes a compression cylinder 41. The first storage chamber 210 and the second storage chamber 211 are respectively communicated with the compression cylinder 41 through a hose 45. The first storage chamber 210 is communicated with the airbag 25; pressure gauges 42 and connectors 43 are respectively installed on the side wall of the hose 45, and a valve 44 is installed on the side wall of the connector 43. Air is injected into or discharged from the inside of the compression cylinder 41 through the connector 43 to change the pressure inside the two compression cylinders 41.

[0023] The side wall of the cylinder body 22 is provided with an observation window 23, and the observation window 23 is aligned with the magnetic ring 213. In order to view the position of the piston 26 through the observation window 23, so as to facilitate the pressure inside the cylinder body 22; A compression plug 46 is slidably connected inside the compression cylinder 41. One end of the compression plug 46 is provided with a screw rod 47, and the screw rod 47 is threadedly connected with the compression cylinder 41. The two compression cylinders 41 are respectively communicated with the first storage chamber 210 and the second storage chamber 211. By rotating the screw rod 47, the screw rod 47 drives the compression plug 46 to move inside the compression cylinder 41, so as to adjust the pressure inside the first storage chamber 210 and the second storage chamber 211. The pressure inside the first storage chamber 210 is denoted as V1, and the pressure inside the second storage chamber 211 is denoted as V2; Before use, the inside of the control mechanism 2 is debugged first. Gas is introduced into the intake pipe 1 at three stages of gas flow rates of less than 10 m / s, 10 m / s to 30 m / s, and greater than 30 m / s. In the three flow rate stages, by rotating the screw rod 47, the magnitudes of V1 and V2 are adjusted, and the thrusts received on the two end surfaces of the piston 26 are changed, so that the piston 26 moves up and down inside the cylinder body 22. Thus, when the gas flow rate is less than 10 m / s, the piston 26 is adsorbed on the surface of the lowermost magnetic ring 213; When the gas flow rate is between 10 m / s and 30 m / s, the piston 26 is adsorbed on the surface of the magnetic ring 213 at the middle position; When the gas flow rate is greater than 30 m / s, the piston 26 is adsorbed on the surface of the uppermost magnetic ring 213, so as to change the position of the piston 26 according to the gas flow rate inside the intake pipe 1.

[0024] One end of the intake pipe 1 is installed with a regulating mechanism 2 for changing the blade angle. One end of the regulating mechanism 2 is installed with a jet pipe 3 for delivering gas into the boiler, and an outlet of the jet pipe 3 is installed with a mixing mechanism 6 for fully mixing ammonia and oxygen; The regulating mechanism 2 includes a connecting pipe 21. One end of the connecting pipe 21 is installed with the intake pipe 1, and a cylinder body 22 is installed on the surface of the connecting pipe 21. An airbag 25 is installed at the bottom end of the cylinder body 22, and part of the airbag 25 is located inside the cylinder body 22; A piston 26 is slidably connected inside the cylinder body 22, and the inside of the cylinder body 22 is divided into two spaces, a first storage chamber 210 and a second storage chamber 211, by the piston 26; A lifting rod 28 and a first spring 27 are installed on the surface of the piston 26, and a sealing ring 29 is installed at the connection between the lifting rod 28 and the cylinder body 22; The top end of the first spring 27 abuts against the inner side wall of the cylinder body 22; A plurality of magnetic rings 213 are installed on the inner side wall of the cylinder body 22, and an annular card slot 214 is provided inside the magnetic ring 213; A plurality of magnets 215 are slidably connected inside the piston 26. The magnets 215 are engaged with the card slot 214 and adsorb the magnetic ring 213, and one end of the magnet 215 is in a hemispherical structure. In order to facilitate one end of the magnet 215 to enter the inside of the card slot 214, the stability of the connection between the magnetic ring 213 and the piston 26 is increased, and the piston 26 is prevented from randomly shaking on the side wall of the magnetic ring 213; A plurality of second springs 216 are installed inside the piston 26, and one end of the second spring 216 is connected to the magnet 215; The mixing mechanism 6 includes a turbine disc 61. A cylindrical adjusting block 67 is slidably connected inside the turbine disc 61, and the adjusting block 67 is fixedly connected to the lifting rod 28; A plurality of clamping balls 66 are fixedly connected to the side wall of the adjusting block 67, and the clamping balls 66 are slidably connected inside a clamping plate 69; A plurality of rotating shafts 63 are rotatably connected inside the turbine disc 61. One end of the rotating shaft 63 is fixedly connected to the middle of the side wall of the clamping plate 69. The clamping plate 69 is inclined inside the turbine disc 61, and the other end of the rotating shaft 63 is fixedly connected to a blade 62.When the flow rate of ammonia and oxygen inside the intake pipe 1 is less than 10 m / s, during the gas flow inside the connecting pipe 1, the airbag 25 inside the connecting pipe 21 is squeezed, the pressure inside the first storage chamber 210 increases, and the thrust on the piston 26 increases. At this time, the magnet 215 on the side wall of the piston 26 adsorbs the lowermost one of the magnetic rings 213 to fix the piston 26 and prevent the piston 26 and the lifting rod 28 from moving upward. At this time, the angle between the blade 62 and the turbine disk 61 is 30°, and the rotation of the blade 62 makes the air flow organization at the outlet of the jet pipe 3 more uniform, which is beneficial to combustion; when the flow rate of ammonia and oxygen inside the intake pipe 1 is between 10 m / s and 30 m / s, the flow rate inside the connecting pipe 21 increases, and the extrusion force on the airbag 25 with an arc-shaped side wall increases accordingly. The airbag 25 contracts, and the internal gas rushes into the first storage chamber 210. The pressure inside the first storage chamber 210 increases, and the thrust on the piston 26 increases. At this time, the thrust on the piston 26 is greater than the resistance of the piston 26 to move. At this time, the piston 26 moves upward, the magnet 215 is squeezed into the piston 26 to compress the second spring 216, and the magnet 26 is separated from the card slot 214, facilitating the upward movement of the piston 26. After the magnet 215 and the magnetic ring 213 are separated, the adsorption force between them decreases, and the resistance of the piston 26 decreases, facilitating the piston 26 to overcome the resistance and continue to move. When the piston 26 moves to the middle position of the second magnetic ring 213, the magnet 215 is aligned with the card slot 214, the second spring 216 pushes the magnet 215 into the card slot 214, and the magnet 215 adsorbs the magnetic ring 213. The resistance of the piston 26 suddenly increases, and the piston 26 is stuck on the magnetic ring 213 in the middle position. At this time, the piston 26 drives the lifting rod 28 to move upward, the lifting rod 28 drives the clamping ball 66 to move upward, and the clamping ball 66 moves vertically inside the inclined clamping plate 69, thereby pushing the clamping plate 69, the rotating shaft 63 and the blade 62 to rotate, so that the blade 62 rotates 15°. At this time, the angle between the blade 62 and the turbine disk 61 is 45°, and the rotation of the blade 62 makes the air flow organization at the outlet of the jet pipe 3 more uniform, which is beneficial to combustion; when the flow rate of ammonia and oxygen is greater than 30 m / s, similarly, the piston 26 is pushed upward again to adsorb on the inner side wall of the uppermost magnetic ring 213, and the lifting rod 28 is continuously pushed upward to make the blade 62 rotate. At this time, the angle between the blade 62 and the turbine disk 61 is 60°, and the rotation of the blade 62 makes the air flow organization at the outlet of the jet pipe 3 more uniform, which is beneficial to combustion, so as to adjust the angle of the blade 62 according to the flow rate.

[0025] An installation plate 24 with a funnel-shaped interior is installed at the connection between the connecting pipe 21 and the cylinder body 22. The airbag 25 is connected to the inner side wall of the installation plate 24. To facilitate the sliding of the airbag 25 along the installation plate 24, the inflated side wall is arc-shaped. The airbag 25 is located inside the connecting pipe 21 to facilitate the airflow squeezing the airbag 25. Moreover, the inner bottom surface of the connecting pipe 21 is arc-shaped to facilitate the airflow moving upward along the arc surface to squeeze the airbag 25, increasing the contact area between the airflow and the airbag 25 and facilitating the airflow squeezing the airbag 25.

[0026] A plurality of limiting blocks 212 are installed inside the cylinder body 22. The limiting blocks 212 abut against the side wall of the piston 26 to facilitate the fixing of the piston 26 by the limiting blocks 212 and limit the moving distance of the piston 26. Moreover, the height of the piston 26 is greater than the height of the magnetic ring 213 to facilitate the piston 26 closing the card slot 214 inside the magnetic ring 213 and preventing the communication between the first storage chamber 210 and the second storage chamber 211.

[0027] The connecting pipe 21 and the jet pipe 3 are connected by a communicating pipe 31 with an arc-shaped side wall. Moreover, a deflector 32 with an arc-shaped side wall is installed inside the jet pipe 3 to enable the gas inside the communicating pipe 31 to move along the side wall of the deflector 32, reducing the resistance of the airflow movement and enabling the airflow to move inside the jet pipe 3 and enter the boiler interior.

[0028] A fixing ring 5 is installed on the side wall of the lifting rod 28. A plurality of through holes 51 are obliquely provided on the side wall of the fixing ring 5. The fixing ring 5 is located inside the jet pipe 3. When the airflow moves along the jet pipe 3, the airflow contacts the fixing ring 5 with a funnel-shaped bottom end for flow disturbance, making the gas mixture more uniform and enabling some of the airflow to enter the interior of the through holes 51. The airflow moves obliquely along the through holes 51 and then sprays obliquely from the interior of the through holes 51 to contact the side wall of the blade 61, thereby increasing the thrust of the airflow on the blade 61, increasing the rotation speed of the blade 61, and facilitating the rotation of the blade 61 to mix the gas evenly. Moreover, the interior of the jet pipe 3 is a hollow frustum-shaped structure. When the airflow velocity is lower, the distance between the fixing ring 5 and the deflector 32 is closer, and the distance between the fixing ring 5 and the inner side wall of the jet pipe 3 is smaller, so that more gas is sprayed obliquely through the through holes 51 onto the surface of the blade 61, thereby increasing the rotation speed of the blade 61 during the low-speed gas pushing process.

[0029] Bearings 64 are installed at the bottom ends of the turbine disk 61 and the adjusting block 67, and the bearings 64 are installed inside the bearing housing 65; the bearing housing 65 at the bottom end of the adjusting block 67 is fixedly connected to the lifting rod 28, and the bearing housing 65 on the side wall of the turbine disk 61 is installed inside the jet pipe 3. To facilitate the bearing housing 65 and the bearings 64 to fix the turbine disk 61 and the adjusting block 67, and facilitate the synchronous rotation of the turbine disk 61 and the adjusting block 67 inside the jet pipe 3, and the adjusting block 3 rotates at the top end of the lifting rod 28.

[0030] A hexagonal prism 68 is fixedly connected to the top end of the adjusting block 67, and the hexagonal prism 68 is engaged and slidably connected inside the turbine disk 61. To facilitate the adjusting block 67 to drive the hexagonal prism 68 to move linearly inside the turbine disk 61 during the movement process, and drive the adjusting block 67 to rotate synchronously through the hexagonal prism 68 during the rotation process of the turbine disk 61.

[0031] The working principle of the ammonia intake regulating device for an ammonia-coal combustion boiler provided by the present invention is as follows: The air outlet of the jet pipe 3 is communicated with the inside of the boiler, and the gas formed by the mixture of ammonia and oxygen sequentially enters the boiler through the intake pipe 1, the connecting pipe 21, the communicating pipe 31, and the jet pipe 3 for combustion. During the movement of the gas inside the jet pipe 3, it pushes the blades 61 and the turbine disk 61 to rotate. The rotation of the blades 61 stirs the air flow at the air outlet, making the mixture of ammonia and oxygen uniform at the air outlet. When the flow rate of ammonia and oxygen inside the intake pipe 1 is less than 10 m / s, the gas flowing inside the connecting pipe 1 squeezes the airbag 25 inside the connecting pipe 21, and the pressure inside the first storage chamber 210 increases, increasing the thrust on the piston 26. At this time, the magnet 215 on the side wall of the piston 26 adsorbs the lowermost one of the magnetic rings 213 to fix the piston 26 and prevent the piston 26 and the lifting rod 28 from moving upward. At this time, the angle between the blade 62 and the turbine disk 61 is 30° (as shown in the attachment Figure 8 ), and the rotation of the blade 62 makes the air flow organization at the outlet of the jet pipe 3 more uniform, which is beneficial to combustion.

[0032] When the flow rates of ammonia and oxygen inside the intake pipe 1 are between 10 m / s and 30 m / s, the flow rate inside the connecting pipe 21 increases, and the extrusion force on the airbag 25 with an arc-shaped side wall increases accordingly. The airbag 25 contracts, causing the internal gas to rush into the first storage chamber 210. The pressure inside the first storage chamber 210 increases, and the thrust on the piston 26 increases. At this time, the thrust on the piston 26 is greater than the resistance to the movement of the piston 26. At this time, the piston 26 moves upward, and the magnet 215 with a hemispherical end is squeezed into the piston 26 to compress the second spring 216. The magnet 26 separates from the card slot 214, facilitating the upward movement of the piston 26 to compress the first spring 216. At the same time, the movement of the piston 26 increases the pressure inside the second storage chamber 211; when the magnet 215 separates from the magnetic ring 213, the adsorption force between the two decreases, and the resistance to the piston 26 decreases, facilitating the piston 26 to overcome the resistance and continue to move. When the piston 26 moves to the middle position of the second magnetic ring 213, the magnet 215 aligns with the card slot 214, and the second spring 216 pushes the magnet 215 into the card slot 214, and the magnet 215 adsorbs the magnetic ring 213. The resistance to the piston 26 suddenly increases, locking the piston 26 on the magnetic ring 213 in the middle position to prevent the piston 26 from continuing to move upward. At this time, the piston 26 drives the lifting rod 28 to move upward, and the lifting rod 28 drives the clamping ball 66 to move upward. The clamping ball 66 moves vertically inside the inclined clamping plate 69 (as shown in the appendix Figure 6 ), thereby driving the clamping plate 69, the rotating shaft 63, and the blade 62 to rotate, causing the blade 62 to rotate by 15°. At this time, the angle between the blade 62 and the turbine disk 61 is 45° (as shown in the appendix Figure 9 ), and the rotation of the blade 62 makes the air flow organization at the outlet of the jet pipe 3 more uniform, which is beneficial to combustion; when the flow rates of ammonia and oxygen are greater than 30 m / s, the piston 26 is similarly pushed upward again to adsorb on the inner side wall of the uppermost magnetic ring 213, and the lifting rod 28 is continuously pushed upward to make the blade 62 rotate. At this time, the angle between the blade 62 and the turbine disk 61 is 60° (as shown in the appendix Figure 10As shown, the rotation of the blade 62 makes the air flow organization at the outlet of the jet pipe 3 more uniform, which is beneficial to combustion. When the internal flow velocity of the intake pipe 1 drops from above 30 m / s to 30 m / s, the extrusion force received by the airbag 25 decreases, and part of the gas inside the first storage chamber 210 is squeezed into the inside of the airbag 25, causing the airbag 25 to expand inside the connecting pipe 21. The thrust of the first storage chamber 210 on the piston 26 decreases, and the thrust of the piston 26 moving downward is greater than the resistance of the piston 26's movement. Under the thrust of the first spring 27 and the gas inside the second storage chamber 211, the piston 26 moves and gets stuck on the surface of the magnetic ring 213 located in the middle position, thereby changing the angle of the blade 62 according to the gas flow velocity. During use, the pressures inside the first storage chamber 210 and the second storage chamber 211 are appropriately adjusted according to the pressure gauge 42 and the position of the piston 26, so as to automatically adjust the position of the piston 26 inside the cylinder body 22 according to the flow velocity inside the intake pipe 1.

[0033] The reasons why the blade angle of the turbine significantly affects the ammonia concentration and velocity distribution at the air outlet are as follows: Refer to the attached drawings of the specification Figure 11 、 Figure 12 and Figure 13 , the blade angle of the turbine significantly affects the ammonia concentration and velocity distribution at the outlet of the burner. At different blade angles of 30°, 45°, and 60°, when the air flow velocity is low at 10 m / s, the air flow organization is more uniform at a blade angle of 30°, which is beneficial to combustion; when the air flow velocity is 20 m / s and 30 m / s, the air flow organization is more uniform at a blade angle of 45°, which is beneficial to combustion. Therefore, it is necessary to adjust the blade angle according to the magnitude of the air flow velocity to make the fuel combustion effect at the outlet of the burner better.

[0034] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. An ammonia gas inlet regulating device for an ammonia coal combustion boiler, characterized in that: include: An air inlet pipe (1), a regulating mechanism (2) for changing the blade angle being installed at one end of the air inlet pipe (1), an injection pipe (3) for conveying gas to the inside of the boiler being installed at one end of the regulating mechanism (2), and a mixing mechanism (6) for fully mixing ammonia and oxygen being installed at the gas outlet of the injection pipe (3); The regulating mechanism (2) comprises a connecting tube (21), one end of which is mounted on an air intake pipe (1), and a cylinder (22) is mounted on the surface of the connecting tube (21), an air bag (25) is mounted on the bottom end of the cylinder (22), and a portion of the air bag (25) is located inside the cylinder (22); the cylinder (22) is slidably connected to a piston (26), and the cylinder (22) is divided into two spaces, a first storage chamber (210) and a second storage chamber (211) by the piston (26); a lifting rod (28) and a first spring (27) are mounted on the surface of the piston (26), and the lifting rod (28) is connected to the cylinder (2 2); a sealing ring (29) is installed at the connection between the first spring (27) and the cylinder (22); the top end of the first spring (27) contacts the inner wall of the cylinder (22); a plurality of magnetic rings (213) are installed on the inner wall of the cylinder (22), and an annular groove (214) is provided inside the magnetic ring (213); a plurality of magnets (215) are slidably connected inside the piston (26), and the magnets (215) engage the grooves (214) and absorb the magnetic rings (213), and one end of the magnets (215) is in a hemispherical structure; a plurality of second springs (216) are installed inside the piston (26), and one end of the second spring (216) is connected to the magnets (215); A pressure regulating mechanism (4) for regulating the internal pressure of the first storage chamber (210) and the second storage chamber (211) is installed on one side of the regulating mechanism (2); The mixing mechanism (6) comprises a turbine disk (61), the interior of the turbine disk (61) is slidably connected to a cylindrical adjustment block (67), and the adjustment block (67) is fixedly connected to the lifting rod (28); the side wall of the adjustment block (67) is fixedly connected to a plurality of locking balls (66), and the locking balls (66) are slidably connected to the interior of a clamping plate (69); the interior of the turbine disk (61) is rotatably connected to a plurality of rotating shafts (63), one end of the rotating shaft (63) is fixedly connected to the center of the side wall of the clamping plate (69), the clamping plate (69) is tilted and located inside the turbine disk (61), and the other end of the rotating shaft (63) is fixedly connected to the blade (62).

2. The ammonia intake regulating device for an ammonia coal combustion boiler according to claim 1, characterized in that: One end of the air intake pipe (1) connected to the connecting pipe (21) is funnel-shaped, and a flow meter (11) is installed on the side wall of the air intake pipe (1).

3. The ammonia intake regulating device for an ammonia coal combustion boiler according to claim 2, characterized in that: A mounting plate (24) with a funnel shape inside is installed at the connection point between the connecting tube (21) and the cylinder (22), the air bag (25) is connected to the inner side wall of the mounting plate (24), and the inner bottom surface of the connecting tube (21) is an arc-shaped structure.

4. The ammonia intake regulating device for an ammonia coal combustion boiler according to claim 3, characterized in that: An observation window (23) is provided on the side wall of the cylinder (22), and the observation window (23) is aligned with the magnetic ring (213).

5. The ammonia intake regulating device for an ammonia coal combustion boiler according to claim 3, characterized in that: A plurality of limit blocks (212) are installed inside the cylinder (22), the limit blocks (212) abut against the side walls of the piston (26), and the height of the piston (26) is greater than the height of the magnetic ring (213).

6. The ammonia intake regulating device for an ammonia coal combustion boiler according to claim 1, characterized in that: The pressure regulating mechanism (4) comprises a compression cylinder (41); the first storage chamber (210) and the second storage chamber (211) are respectively connected to the compression cylinder (41) via a hose (45); the first storage chamber (210) is connected to the airbag (25); a pressure gauge (42) and a joint (43) are respectively installed on the side walls of the hose (45); a valve (44) is installed on the side wall of the joint (43); the interior of the compression cylinder (41) is slidably connected to a compression plug (46); a screw rod (47) is installed at one end of the compression plug (46); and the screw rod (47) is threadedly connected to the compression cylinder (41).

7. The ammonia intake regulating device for an ammonia coal combustion boiler according to claim 1, characterized in that: The connecting pipe (21) and the air injection pipe (3) are connected via a connecting pipe (31) with an arc-shaped side wall, and a guide plate (32) with an arc-shaped side wall is installed inside the air injection pipe (3).

8. The ammonia intake regulating device for an ammonia coal combustion boiler according to claim 1, characterized in that: A fixing ring (5) is installed on the side wall of the lifting rod (28), and a plurality of through holes (51) are provided on the side wall of the fixing ring (5) at an angle; the fixing ring (5) is located inside the air jet pipe (3), and the interior of the air jet pipe (3) is a hollow truncated cone-shaped structure.

9. The ammonia intake regulating device for an ammonia coal combustion boiler according to claim 1, characterized in that: The bottom ends of the turbine disc (61) and the adjusting block (67) are both installed with bearings (64), and the bearings (64) are installed inside a bearing sleeve (65); the bearing sleeve (65) at the bottom end of the adjusting block (67) is fixedly connected to the lifting rod (28), and the bearing sleeve (65) on the side wall of the turbine disc (61) is installed inside the jet pipe (3).

10. The ammonia intake regulating device for an ammonia coal combustion boiler according to claim 1, characterized in that: The top end of the regulating block (67) is fixedly connected to a hexagonal prism (68), and the hexagonal prism (68) is engaged and slidably connected to the interior of the turbine disc (61).

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