A swirling combustion secondary combustion boiler

Abstract

The present invention discloses a swirl combustion secondary combustion boiler, which relates to the technical field of boiler heaters for heating. A swirl combustion secondary combustion boiler includes a boiler body for heating. The interior of the boiler body is divided by a heat conduction plate into a storage cavity for storing water or air and a combustion cavity for heating. A circulation component is provided on the boiler body for circulating during the heating of the water or air inside the storage cavity. When the present invention uses the swirl combustion secondary combustion boiler to continuously heat water or air in a flowing manner to achieve a heating effect, through the mutual cooperation of components such as the swirl combustion component, the secondary combustion control component, the swirl component, and the recognition component, the rotation intensity of the secondary air and the swirl intensity of the air flow can be automatically and adaptively controlled and adjusted according to the type of fuel transported, ensuring the full combustion of the fuel, improving the combustion speed and efficiency, and reducing the emissions of pollutants such as carbon monoxide and hydrocarbons.

Description

Technical Field

[0001] The present invention relates to the technical field of boiler heaters for heating, and particularly to a swirl combustion secondary combustion-aided boiler. Background Technique

[0002] The swirl combustion secondary combustion-aided boiler releases a large amount of heat through combustion, and then transfers the heat to the heating surface inside the boiler through heat conduction, convection, radiation, etc. The heating surface is usually composed of pipes. The water or other heat transfer medium inside the pipes absorbs heat and then the temperature rises, thereby generating steam or hot water. These steam or hot water are transported to the places where heating is required through pipes to achieve the purpose of heating.

[0003] When the swirl combustion secondary combustion-aided boiler is in use, the fuel and air are fully mixed through the swirl combustion method, and the combustion is more complete. At the same time, the secondary combustion can supplement the oxygen required for combustion, further improve the combustion efficiency, reduce the waste of fuel, and improve the efficiency of the boiler heater during the heating process. When the swirl combustion secondary combustion-aided boiler is in use, different fuels need to be switched according to different usage times. For example, at the initial stage of boiler startup, flammable fuels such as ignition oil or natural gas are required to quickly ignite the boiler. After the boiler runs stably, it is switched to conventional coal fuel. During low-load operation, in order to ensure the stability and economy of combustion, it may be switched to more easily combustible fuels such as high-quality bituminous coal or natural gas. However, during the operation of the swirl combustion secondary combustion-aided boiler, the swirl intensity of the swirl burner is fixed, and the mixing method and amount of secondary air are relatively fixed, making it difficult to adjust in a timely manner according to the change of coal quality. When the coal quality change causes an increase in the oxygen demand, there will be oxygen-deficient combustion, resulting in incomplete combustion and affecting the heating treatment efficiency of water or air when the swirl combustion secondary combustion-aided boiler is in use. For this reason, we propose a swirl combustion secondary combustion-aided boiler. Summary of the Invention

[0004] The purpose of the present invention is to provide a swirl combustion secondary combustion-aided boiler to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A swirl combustion secondary combustion-aided boiler, including a boiler body for heating, the interior of the boiler body is divided by a heat conduction plate into a storage cavity for storing water or air and a combustion cavity for heating, and a circulation component for circulating during the heating of the water or air inside the storage cavity is provided on the boiler body. The boiler also includes:

[0006] A swirl combustion component for mixing and transporting external air and fuel into the combustion cavity;

[0007] A secondary combustion control component provided inside the swirl combustion component for secondary air supply and combustion assistance during the fuel mixing and transportation process;

[0008] And a swirl component, which is arranged inside the swirl combustion component and used to generate swirl during the fuel mixing and conveying process;

[0009] The swirl combustion component includes a volute swirl cylinder body and a central air duct centrally installed on the volute swirl cylinder body. A swirl chamber is formed between the inner side of the volute swirl cylinder body and the inner position of the central air duct. A secondary air duct for secondary air supply is installed on the volute swirl cylinder body and is communicated with the swirl chamber. The secondary combustion assistance control component is arranged inside the secondary air duct. A connecting cylinder for assisting in communicating with the inside of the combustion chamber is arranged between the volute swirl cylinder body and the boiler body. The swirl component is arranged inside the connecting cylinder. An identification component for identifying the state of the mixed and conveyed fuel is arranged on the central air duct.

[0010] Preferably, the secondary combustion assistance control component includes an air outlet pipe fixed inside the swirl chamber. The air outlet pipe is communicated with the secondary air duct through a flexible cylinder. A locking rope is sleeved outside the flexible cylinder. An installation frame is fixedly connected inside the swirl chamber through an installation rod. A pulling component for pulling the locking rope is arranged on the installation frame. A first linkage component for assisting in linkage is arranged between the identification component and the pulling component.

[0011] Preferably, the pulling component includes two groups of sliding plates symmetrically arranged inside the installation frame. The two ends of the locking rope are arranged in a crossed state and are respectively fixed to the two groups of sliding plates. A threaded sleeve is fixed on the sliding plate. A double-headed screw rod is rotatably connected inside the installation frame, and the thread directions at both ends of the double-headed screw rod are opposite. The two groups of threaded sleeves are respectively meshed with the two ends of the double-headed screw rod. Two groups of guide rods are slidably connected to the sliding plate. The two groups of guide rods are symmetrically arranged on both sides of the double-headed screw rod, and the guide rods are fixed inside the installation frame.

[0012] Preferably, the identification component includes a circular frame arranged inside the volute swirl cylinder body. The circular frame is located on one side of the discharge end of the central air duct and is fixedly connected through a plurality of L-shaped frames. An identification circular plate is arranged inside the central air duct. The outer diameter of the identification circular plate is smaller than the inner diameter of the central air duct. An elastic force component for assisting in elastic connection is arranged between the identification circular plate and the circular frame.

[0013] Preferably, the elastic force component includes a plurality of sleeves fixed on one side of the identification circular plate, and the plurality of sleeves are arranged in an annular array. A sliding rod is slidably connected to the sleeve. One end of the sliding rod is fixed to the circular frame. A spring is sleeved outside the sleeve, and the two ends of the spring are respectively abutted against the circular frame and the identification circular plate.

[0014] Preferably, the first linkage assembly includes a linkage rod slidably connected to the circular frame. One end of the linkage rod is fixed to the identification disc. An installation frame is fixed on the linkage rod. A rack is connected to the installation frame through multiple fixing rods. An installation shaft is rotatably connected to the installation frame. One end of the installation shaft is fixed to one end of a double-headed screw rod. The other end of the installation shaft is fixed with a gear, and the gear is meshed with the rack.

[0015] Preferably, the swirl assembly includes a support frame fixed inside the connecting cylinder. A drive shaft is rotatably connected to the support frame. An installation disc is fixed on the drive shaft. A drive motor for driving the drive shaft is installed on the support frame. Multiple guide vanes are connected to the outside of the installation disc through a sliding assembly. The guide vanes are arranged in an annular array around the installation disc and are inclined. An adjustment assembly for adjusting the swirl intensity is arranged on the installation disc. A second linkage assembly for auxiliary linkage is arranged between the linkage rod and the adjustment assembly.

[0016] Preferably, the sliding assembly includes a chute opened on the outside of the installation disc. A sliding seat is slidably connected to the chute. The guide vane is fixed to the end of the sliding seat.

[0017] Preferably, the adjustment assembly includes a spline shaft centrally fixed to the front end of the installation disc. A push disc is slidably connected to the spline shaft through a spline hole. Multiple through slots are opened on the installation disc, and each group of through slots is respectively communicated with each group of chutes. A connecting rod is arranged on the through slot. The two ends of the connecting rod are respectively rotatably connected to the sliding seat and the push disc through pin shafts.

[0018] Preferably, the second linkage assembly includes a linkage disc arranged on one side of the push disc. The linkage disc and the push disc are connected and fixed through multiple round rods. A rotating disc is rotatably connected to one side of the linkage disc through a round groove. One end of the linkage rod is centrally fixed to the rotating disc.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] When the present invention uses a swirl combustion secondary combustion boiler to perform continuous fluid heating treatment on water or air to achieve a heating effect, through the mutual cooperation of components such as the swirl combustion assembly, the secondary combustion control assembly, the swirl assembly, and the identification assembly, it can autonomously and adaptively control and adjust the rotation intensity of the secondary air and the swirl intensity of the air flow according to the type of fuel transported, ensuring the full combustion of the fuel, improving the combustion speed and efficiency, and reducing the emissions of pollutants such as carbon monoxide and hydrocarbons. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall external structure of the present invention;

[0022] Figure 2 Schematic diagram of the internal structure of the boiler of the present invention;

[0023] Figure 3 Schematic diagram of the structure of the swirl combustion assembly of the present invention;

[0024] Figure 4 Schematic diagram of the structure of the identification assembly and the elastic force assembly of the present invention;

[0025] Figure 5 Schematic diagram of the structure of the secondary combustion assistance control assembly and the first linkage assembly of the present invention;

[0026] Figure 6 Schematic diagram of the structure of the pulling assembly of the present invention;

[0027] Figure 7 Schematic diagram of the transmission process of the pulling assembly of the present invention;

[0028] Figure 8 Schematic diagram of the structure of the swirl assembly and the first linkage assembly of the present invention;

[0029] Figure 9 Schematic diagram of the structure of the sliding assembly, the adjusting assembly and the second linkage assembly of the present invention;

[0030] Figure 10 Schematic diagram of the transmission during the adjustment process of the adjusting assembly of the present invention;

[0031] Figure 11 Schematic diagram of the state when the identification assembly of the present invention identifies gaseous coal material;

[0032] Figure 12 Schematic diagram of the state when the identification assembly of the present invention identifies granular coal material.

[0033] In the figure: 101 - boiler body; 102 - storage cavity; 103 - combustion cavity; 201 - volute swirl cylinder; 202 - central air duct; 203 - secondary air duct; 204 - connecting cylinder; 301 - air outlet pipe; 302 - flexible cylinder; 303 - locking rope; 4 - mounting frame; 5 - mounting rod; 601 - sliding plate; 602 - threaded sleeve; 603 - double-headed lead screw; 604 - guide rod; 701 - circular frame; 702 - L-shaped frame; 703 - identification circular plate; 801 - sleeve; 802 - sliding rod; 803 - spring; 901 - linkage rod; 902 - mounting bracket; 903 - fixing rod; 904 - rack; 905 - mounting shaft; 906 - gear; 1001 - support frame; 1002 - drive shaft; 1003 - mounting disc; 1004 - drive motor; 1005 - guide vane; 1101 - chute; 1102 - sliding seat; 1201 - spline shaft; 1202 - push plate; 1203 - through slot; 1204 - connecting rod; 1301 - linkage disc; 1302 - round rod; 1303 - rotating disc. Detailed implementation mode

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative work shall fall within the protection scope of the present invention.

[0035] Embodiment 1

[0036] Please refer to Figures 1-12 , a swirl combustion secondary combustion-aiding boiler in the figure, includes a boiler body 101 for heating. The inside of the boiler body 101 is divided into a storage cavity 102 for storing water or air and a combustion cavity 103 for heating by a heat conduction plate. A circulation component is arranged on the boiler body 101 for circulating during the heating of the water or air inside the storage cavity 102;

[0037] It should be noted here that: a burner for assisting the combustion of the incoming air and coal is arranged inside the combustion cavity 103. The burner and the circulation component are common operating components in the technical field of combustion-aiding boilers, and their working principles and operating methods will not be further elaborated here;

[0038] It further includes:

[0039] A swirl combustion component for mixing and transporting external air and fuel into the combustion cavity 103;

[0040] A secondary combustion-aiding control component arranged inside the swirl combustion component for secondary air supply and combustion during the fuel mixing and transportation process;

[0041] And a swirl component arranged inside the swirl combustion component for generating swirl during the fuel mixing and transportation process;

[0042] The swirl combustion component includes a volute swirl cylinder 201 and a central air duct 202 centrally installed on the volute swirl cylinder 201. A swirl cavity is formed between the inner side of the volute swirl cylinder 201 and the inside of the central air duct 202. A secondary air duct 203 for secondary air supply communicated with the swirl cavity is installed on the volute swirl cylinder 201. The secondary combustion-aiding control component is arranged inside the secondary air duct 203. A connecting cylinder 204 for assisting in communicating with the inside of the combustion cavity 103 is arranged between the volute swirl cylinder 201 and the boiler body 101. The swirl component is arranged inside the connecting cylinder 204. An identification component for identifying the state of the mixed and transported fuel is arranged on the central air duct 202;

[0043] It should be noted here that when the swirling combustion secondary combustion boiler is used to continuously heat water or air in a flowing manner to achieve the heating effect, through the mutual cooperation of components such as the swirling combustion component, the secondary combustion control component, the swirling component, and the identification component, the swirling intensity of the secondary air and the swirling intensity of the air flow can be autonomously and adaptively controlled and adjusted according to the type of fuel being transported, ensuring the full combustion of the fuel, improving the combustion speed and efficiency, and reducing the emissions of pollutants such as carbon monoxide and hydrocarbons.

[0044] Preferably, the secondary combustion control component includes an air outlet pipe 301 fixed inside the swirling chamber. The air outlet pipe 301 is connected to the secondary air pipe 203 through a flexible cylinder 302. A locking rope 303 is sleeved outside the flexible cylinder 302. An installation frame 4 is fixedly connected inside the swirling chamber through an installation rod 5. A pulling component for pulling the locking rope 303 is provided on the installation frame 4. A first linkage component for auxiliary linkage is provided between the identification component and the pulling component;

[0045] It should be noted here that when the swirling combustion secondary combustion boiler is used to continuously heat water or air in a flowing manner, through driving, the fuel and part of the air are transported into the interior of the combustion chamber 103 through the central air pipe 202 and the connecting cylinder 204. During the transportation process, the external air is transported into the interior of the volute swirling cylinder body 201 through the secondary air pipe 203, the flexible cylinder 302, and the air outlet pipe 301. During the transportation process, due to the shape setting of the volute swirling cylinder body 201, the transported air forms a rotational movement inside the swirling chamber and is mixed and transported spirally with the fuel and part of the air transported on the central air pipe 202;

[0046] It is worth noting here that the flexible cylinder 302 is made of silicone rubber and has good high-temperature resistance and flexible expansion. Through the telescopic action of the flexible cylinder 302, it is convenient to assist in adjusting the aperture of the flexible cylinder 302;

[0047] It should be noted here that the transportation of the fuel and part of the air inside the central air pipe 202 and the transportation of the air inside the secondary air pipe 203 are conventional technical means in the combustion driving process, and their working principles and operation methods will not be further elaborated in this application.

[0048] Preferably, the pulling assembly includes two groups of sliding plates 601 symmetrically arranged inside the mounting frame 4. The two ends of the locking rope 303 are arranged in a crossed state and are respectively fixed to the two groups of sliding plates 601. A threaded sleeve 602 is fixed on the sliding plate 601. A double-headed lead screw 603 is rotatably connected inside the mounting frame 4, and the thread directions at both ends of the double-headed lead screw 603 are opposite. The two groups of threaded sleeves 602 are respectively engaged with the two ends of the double-headed lead screw 603. Two guide rods 604 are slidably connected to the sliding plate 601. The two guide rods 604 are symmetrically arranged on both sides of the double-headed lead screw 603, and the guide rods 604 are fixed inside the mounting frame 4;

[0049] It should be noted here that: through transmission, the double-headed lead screw 603 rotates. Due to the opposite thread directions at both ends of the double-headed lead screw 603, during the rotation of the double-headed lead screw 603, through the meshing transmission of the two groups of threaded sleeves 602 with the two ends of the double-headed lead screw 603 respectively and the sliding guiding action of the guide rods 604, the two groups of sliding plates 601 are forced to move closer to or away from each other inside the mounting frame 4. Through the movement of the two groups of sliding plates 601, the pulling effect on the locking rope 303 is controlled.

[0050] Preferably, the recognition assembly includes a circular frame 701 arranged inside the volute cyclone cylinder 201. The circular frame 701 is located on one side of the discharge end of the central air duct 202 and is fixedly connected through a plurality of L-shaped frames 702. An identification disc 703 is arranged inside the central air duct 202. The outer diameter of the identification disc 703 is smaller than the inner diameter of the central air duct 202. A elastic force assembly for auxiliary elastic connection is arranged between the identification disc 703 and the circular frame 701;

[0051] It should be noted here that: during the process of fuel being transported inside the central air duct 202, when the transported fuel is high-density solid fuel (such as pulverized coal, pellet fuel), due to the high density and high mass of the fuel, a large impact force will be generated on the identification disc 703 during transportation inside the central air duct 202, pushing the identification disc 703 to displace towards the circular frame 701. And during the process of fuel being transported inside the central air duct 202, when the transported fuel is low-density gas fuel (such as natural gas), due to the extremely low density and small mass, the impact force on the identification disc 703 is extremely small, and the identification disc 703 does not displace.

[0052] Preferably, the elastic force assembly includes a plurality of sleeves 801 fixed on one side of the identification disc 703, and the plurality of sleeves 801 are arranged in an annular array. A slide rod 802 is slidably connected to the sleeve 801. One end of the slide rod 802 is fixed to the circular frame 701. A spring 803 is sleeved outside the sleeve 801, and the two ends of the spring 803 are respectively abutted against the circular frame 701 and the identification disc 703;

[0053] It should be noted here that: through multiple sets of sleeves 801 and multiple sets of sliding rods 802, it is convenient to identify the telescopic movement of the identification circular plate 703 after auxiliary force application. Through the spring 803, it is convenient to reset the identification circular plate 703 after movement.

[0054] Preferably, the first linkage assembly includes a linkage rod 901 slidably connected to the circular frame 701. One end of the linkage rod 901 is fixed to the identification circular plate 703. An installation frame 902 is fixed on the linkage rod 901. A rack 904 is connected to the installation frame 902 through multiple sets of fixing rods 903. An installation shaft 905 is rotatably connected to the installation frame 4. One end of the installation shaft 905 is fixed to one end of the double-headed lead screw 603. The other end of the installation shaft 905 is fixed with a gear 906. The gear 906 and the rack 904 are meshed with each other;

[0055] It should be noted here that: during the movement of the linkage rod 901, through the connection of the installation frame 902 and the fixing rods 903, the rack 904 is driven to move. During the movement of the rack 904, through the meshing transmission between the rack 904 and the gear 906, the installation shaft 905 and the double-headed lead screw 603 at one end of the installation shaft 905 are rotated.

[0056] Preferably, the swirl assembly includes a support frame 1001 fixed inside the connection cylinder 204. A drive shaft 1002 is rotatably connected to the support frame 1001. An installation disk 1003 is fixed on the drive shaft 1002. A drive motor 1004 for driving the drive shaft 1002 is installed on the support frame 1001. The outer side of the installation disk 1003 is connected with multiple sets of guide vane plates 1005 through a sliding assembly. The guide vane plates 1005 are arranged in an annular array around the installation disk 1003 and are inclined. An adjustment assembly for adjusting the swirl intensity is arranged on the installation disk 1003. A second linkage assembly for auxiliary linkage is arranged between the linkage rod 901 and the adjustment assembly;

[0057] It should be noted here that: the drive motor 1004 rotates the installation disk 1003 on the drive shaft 1002. During the rotation of the installation disk 1003, each group of guide vane plates 1005 is driven to rotate. Through the rotation of each group of guide vane plates 1005, a swirl is formed, which further assists the air entering from the secondary air duct 203 to be more fully and evenly mixed with the fuel and part of the air transported on the central air duct 202, improving the combustion efficiency and reducing the pollutants generated by incomplete combustion.

[0058] Preferably, the sliding assembly includes a sliding groove 1101 opened on the outer side of the installation disk 1003. A sliding seat 1102 is slidably connected to the sliding groove 1101. The guide vane plate 1005 is fixed to the end of the sliding seat 1102;

[0059] It should be noted here that: through the sliding groove 1101 and the sliding seat 1102, it is convenient to assist each group of guide vanes 1005 to move closer to or away from each other under force.

[0060] Preferably, the adjusting assembly includes a spline shaft 1201 centrally fixed to the front end of the mounting disc 1003. A push disc 1202 is slidably connected to the spline shaft 1201 through a spline hole. A plurality of through grooves 1203 are formed in the mounting disc 1003, and each group of through grooves 1203 communicates with each group of sliding grooves 1101 respectively. A connecting rod 1204 is arranged on the through groove 1203. The two ends of the connecting rod 1204 are respectively rotatably connected to the sliding seat 1102 and the push disc 1202 through pin shafts;

[0061] It should be noted here that: through transmission, the push disc 1202 is driven to move closer to or away from the mounting disc 1003. During the movement of the push disc 1202, through the connecting and transmitting action of the connecting rod 1204, each group of sliding seats 1102 is pushed to move closer to or away from each other on each group of sliding grooves 1101 respectively. Through the sliding of each group of sliding seats 1102, the radius of outward extension of each group of guide vanes 1005 is adjusted.

[0062] Preferably, the second linkage assembly includes a linkage disc 1301 arranged on one side of the push disc 1202. The linkage disc 1301 and the push disc 1202 are fixedly connected through a plurality of round rods 1302. One side of the linkage disc 1301 is rotatably connected to a rotating disc 1303 through a round groove. One end of the linkage rod 901 is centrally fixed to the rotating disc 1303;

[0063] It should be noted here that: during the movement of the linkage rod 901, through the connection between the linkage rod 901 and the rotating disc 1303, the linkage disc 1301 is driven to move synchronously. During the movement of the linkage disc 1301, through the connection of the round rod 1302, the push disc 1202 is driven to move closer to or away from the mounting disc 1003.

[0064] In this solution: a swirl combustion secondary combustion boiler includes the following steps:

[0065] When using a swirl combustion secondary combustion boiler to continuously heat water or air in a flowing manner, through driving, fuel and part of the air are conveyed towards the inside of the combustion chamber 103 through the central air duct 202 and the connecting cylinder 204. During the conveying process, external air is conveyed towards the inside of the volute swirl cylinder body 201 through the secondary air duct 203. During the conveying process, due to the shape setting of the volute swirl cylinder body 201, the conveyed air forms a rotational motion inside the swirl chamber and is spirally mixed and conveyed with the fuel and part of the air conveyed on the central air duct 202. And during the conveying process, the mounting disc 1003 on the driving shaft 1002 is rotated by the driving motor 1004. During the rotation of the mounting disc 1003, each group of guide vanes 1005 is driven to rotate. Through the rotation of each group of guide vanes 1005, a swirl is formed, further assisting the air entering through the secondary air duct 203 to be more fully and evenly mixed with the fuel and part of the air conveyed on the central air duct 202, improving the combustion efficiency, reducing the pollutants generated by incomplete combustion, and further improving the efficiency when the swirl combustion secondary combustion boiler continuously heats water or air in a flowing manner;

[0066] And during the conveying process of the fuel inside the central air duct 202, when the conveyed fuel is high-density solid fuel (such as pulverized coal, granular fuel), due to the large density and high mass of the fuel, a relatively large impact force will be generated on the identification circular plate 703 during the conveying inside the central air duct 202, pushing the identification circular plate 703 to displace towards the circular frame 701 (see Figure 12 state). During the movement of the identification circular plate 703, the linkage rod 901 is driven to move. During the movement of the linkage rod 901, through the connection of the mounting frame 902 and the fixing rod 903, the rack 904 is driven to move. During the movement of the rack 904, through the meshing transmission between the rack 904 and the gear 906, the mounting shaft 905 and the double-headed lead screw 603 at one end of the mounting shaft 905 are rotated. During the rotation of the double-headed lead screw 603, through transmission, the two slide plates 601 move away from each other inside the mounting frame 4. Through the mutual separation movement of the two slide plates 601 and the connection of the two slide plates 601 to both ends of the locking rope 303 respectively, the locking rope 303 is tightened and pulled (see Figure 7), during the process of tightening and pulling the locking rope 303, the flexible cylinder 302 is tightened by the locking rope 303, reducing the use aperture of the flexible cylinder 302. According to the principle of fluid mechanics, when the channel aperture decreases, the fluid flow rate increases. Due to the action of the spiral structure, the rotation intensity of the secondary air will be enhanced, providing sufficient oxygen for the high-density solid fuel, promoting complete combustion, reducing the emissions of pollutants such as carbon monoxide and hydrocarbons, enhancing the air flow disturbance, improving the mixing uniformity of the high-density solid fuel and air, and avoiding incomplete combustion caused by local lack of oxygen. Moreover, during the movement of the linkage rod 901, through the connection between the linkage rod 901 and the rotating disk 1303, the linkage disk 1301 is driven to move synchronously. During the movement of the linkage disk 1301, through the connection of the round rod 1302, the push disk 1202 is driven to move towards the mounting disk 1003 in a shrinking motion. During the shrinking motion of the push disk 1202, through the connection and transmission of the connecting rod 1204, each group of sliding seats 1102 are respectively pushed to slide outwards on each group of sliding grooves 1101 (see Figure 10 ), the outward extension radius of each group of guide vane plates 1005 is increased by the sliding of each group of sliding seats 1102. When the outward extension radius of the guide vane plates 1005 increases, the guiding effect on the air flow passing through the guide vane plates 1005 is enhanced, increasing the rotation radius of the guide vane plates 1005, thereby enhancing the swirling intensity of the air flow, strengthening the mixing effect of the fuel and air, increasing the combustion speed and efficiency, stabilizing the flame center at the same time, and reducing the erosion of the furnace wall;

[0067] During the process of the fuel being transported inside the central air duct 202, when the transported fuel is a low-density gaseous fuel (such as natural gas), due to its extremely low density and small mass, the impact force on the identification circular plate 703 is extremely small, and the identification circular plate 703 does not displace (see Figure 11), at this time, the elastic component is used to reset the linkage rod 901 and the identification disc 703. During the reset process, through the same transmission, the tightening drive on the flexible cylinder 302 is relieved, and the flexible cylinder 302 resets under the action of its own elasticity, increasing the use aperture of the flexible cylinder 302. According to the principle of fluid mechanics, when the channel aperture increases, the fluid flow rate decreases, and a lower secondary air pressure can meet the requirement of sufficient mixing. If the secondary air pressure is too high, it may cause the gas fuel to flow too fast at the burner outlet, making the flame propagation speed unable to keep up with the air flow speed, resulting in unstable flames or even flameout. Reducing the secondary air pressure can make the gas fuel form a stable combustion flame at the burner outlet, ensuring the stability and safety of combustion. Moreover, during the reset process of the linkage rod 901 and the identification disc 703, through the same transmission, the outward extension radius of each group of guide vanes 1005 is reduced. Reducing the extension radius of the guide vanes 1005 can reduce the swirl intensity of the secondary air, enabling the gas fuel to be evenly mixed and burned with air under a relatively small swirl effect. This can avoid the gas fuel staying in the combustion chamber 103 for too short a time due to excessive swirl and being discharged from the furnace without sufficient combustion. At the same time, it also helps to reduce the generation amount of nitrogen oxides during the combustion process.

[0068] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0069] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A swirl combustion secondary combustion boiler, comprising: A boiler body (101) for supplying heat, wherein the interior of the boiler body (101) is divided into a storage chamber (102) for storing water or air and a combustion chamber (103) for heating by a heat conducting plate, and a circulation component for circulating water or air in the storage chamber (102) during heating is provided on the boiler body (101); It is characterized by further comprising: A swirl combustion component, used for mixing and transporting external air and fuel toward the interior of the combustion chamber (103); A secondary combustion control component is arranged inside the swirl combustion component and is used for secondary air supply and combustion during the fuel mixing and transportation process; and a swirl assembly, which is arranged inside the swirl combustion assembly and is used to generate a swirl during the fuel mixing and conveying process; The swirl combustion component comprises a volute-type swirl cylinder (201) and a central air duct (202) centrally mounted on the volute-type swirl cylinder (201); a swirl chamber is formed between the inner side of the volute-type swirl cylinder (201) and the inner position of the central air duct (202); a secondary air duct (203) for secondary air supply and arranged in communication with the swirl chamber is mounted on the volute-type swirl cylinder (201); the secondary combustion-supporting control component is arranged in the secondary air duct (203); a connecting cylinder (204) for assisting communication with the interior of the combustion chamber (103) is arranged between the volute-type swirl cylinder (201) and the boiler body (101); the swirl component is arranged in the connecting cylinder (204); and an identification component for identifying the state of mixed fuel delivery is arranged on the central air duct (202); The identification component comprises a circular frame (701) arranged inside the volute-type cyclone cylinder (201); the circular frame (701) is located on one side of the discharge end of the central air duct (202) and is connected and fixed by a plurality of groups of L-shaped frames (702); an identification circular plate (703) is arranged inside the central air duct (202); the outer diameter of the identification circular plate (703) is smaller than the inner diameter of the central air duct (202); an elastic component for assisting elastic connection is arranged between the identification circular plate (703) and the circular frame (701); when the transported fuel is a high-density solid fuel, a large impact force is generated on the identification circular plate (703) when transported inside the central air duct (202), pushing the identification circular plate (703) to move toward the circular frame (701); when the transported fuel is a low-density gas fuel, the impact force on the identification circular plate (703) is extremely small, and the identification circular plate (703) does not move.

2. A swirl combustion secondary combustion boiler according to claim 1, characterized in that: The secondary combustion-supporting control component comprises an air outlet pipe (301) fixed inside the swirl chamber, the air outlet pipe (301) and the secondary air duct (203) are connected via a flexible tube (302), a locking rope (303) is sleeved on the outer side of the flexible tube (302), a mounting frame (4) is connected and fixed inside the swirl chamber via a mounting rod (5), a pulling component for pulling the locking rope (303) is provided on the mounting frame (4), and a first linkage component for auxiliary linkage is provided between the identification component and the pulling component.

3. A swirl combustion secondary combustion boiler according to claim 2, characterized in that: The pulling assembly comprises two groups of slide plates (601) symmetrically arranged inside the installation frame (4); the two ends of the locking rope (303) are arranged in a crossed state and are respectively fixed to the two groups of slide plates (601); a threaded sleeve (602) is fixed on the slide plate (601); a double-headed screw rod (603) is rotatably connected inside the installation frame (4); the threads at the two ends of the double-headed screw rod (603) are arranged in opposite directions; the two groups of threaded sleeves (602) are respectively meshed with the two ends of the double-headed screw rod (603); two groups of guide rods (604) are slidably connected to the slide plate (601); the two groups of guide rods (604) are symmetrically arranged on both sides of the double-headed screw rod (603); and the guide rods (604) are fixed inside the installation frame (4).

4. A swirl combustion secondary combustion boiler according to claim 3, characterized in that: The elastic force component comprises a plurality of sets of sleeves (801) fixed to one side of the identification circular plate (703), and the plurality of sets of sleeves (801) are arranged in a state of an annular array, a sliding rod (802) is slidably connected to the sleeves (801), one end of the sliding rod (802) is fixed to the circular frame (701), a spring (803) is sleeved on the outer side of the sleeve (801), and two ends of the spring (803) are respectively arranged to abut against the circular frame (701) and the identification circular plate (703).

5. A swirl combustion secondary combustion boiler according to claim 4, characterized in that: The first linkage assembly comprises a linkage rod (901) slidably connected to the circular frame (701), one end of the linkage rod (901) being fixed to the identification circular plate (703), a mounting frame (902) being fixed to the linkage rod (901), a rack (904) being connected to the mounting frame (902) via a plurality of sets of fixing rods (903), a mounting shaft (905) being rotatably connected to the mounting frame (4), one end of the mounting shaft (905) being fixed to one end of the double-headed lead screw (603), a gear (906) being fixed to the other end of the mounting shaft (905), and the gear (906) and the rack (904) being arranged to mesh with each other.

6. A swirl combustion secondary combustion boiler according to claim 5, characterized in that: The swirl assembly comprises a support frame (1001) fixed inside a connecting tube (204); a driving shaft (1002) is rotatably connected to the support frame (1001); a mounting plate (1003) is fixed to the driving shaft (1002); a driving motor (1004) for driving the driving shaft (1002) is mounted on the support frame (1001); a plurality of guide vanes (1005) are connected to the outer side of the mounting plate (1003) via a sliding assembly; the guide vanes (1005) are arranged in a circular array around the mounting plate (1003) and are tilted; an adjustment assembly for adjusting the swirl intensity is arranged on the mounting plate (1003); and a second linkage assembly for assisting linkage is arranged between the linkage rod (901) and the adjustment assembly.

7. A swirl combustion secondary combustion boiler according to claim 6, characterized in that: The sliding assembly comprises a sliding groove (1101) opened on the outer side of the mounting plate (1003), a sliding seat (1102) is slidably connected to the sliding groove (1101), and the guide vane (1005) is fixed to the end of the sliding seat (1102).

8. The swirl combustion secondary combustion boiler according to claim 6, characterized in that: The adjustment component comprises a spline shaft (1201) fixed centrally at the front end of the mounting plate (1003); a push plate (1202) is slidably connected to the spline shaft (1201) via a spline hole; a plurality of through grooves (1203) are provided on the mounting plate (1003), and each group of through grooves (1203) is communicated with each group of slide grooves (1101); a connecting rod (1204) is provided on the through groove (1203); and two ends of the connecting rod (1204) are rotatably connected to the sliding seat (1102) and the push plate (1202) via a pin shaft.

9. A swirl combustion secondary combustion boiler according to claim 8, characterized in that: The second linkage assembly comprises a linkage disk (1301) arranged on one side of the push disk (1202); the linkage disk (1301) and the push disk (1202) are connected and fixed via a plurality of groups of round rods (1302); one side of the linkage disk (1301) is rotatably connected to a rotating disk (1303) via a circular groove; one end of the linkage rod (901) is centrally fixed on the rotating disk (1303).

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