High-stability low-load combustor and control method thereof

Abstract

The invention discloses a high-stability low-load burner and a control method thereof, and solves the problem that when pulverized coal of an existing burner passes through a primary air pulverized coal pipe, granular pulverized coal is easily adsorbed in the inner wall of each air duct in the primary air pulverized coal pipe, and coking matter and blocking matter which are difficult to clean are formed. Comprising a combustor mounting base, a combustor body, a combustion ignition assembly and an anti-coking mechanism, the combustor body comprises a feeding pipe, a fuel processing pipe, a pressurized air duct and a cyclone dispersing pipe, and the anti-coking mechanism is arranged in the pressurized air duct; according to the anti-coking combustor, the anti-coking mechanism is arranged, the anti-coking mechanism is driven by flowing of pulverized coal, accelerated release of the pulverized coal in the pressurized air duct is achieved, meanwhile, the pulverized coal adsorbed on the inner wall of the pressurized air duct is effectively scraped away, and therefore coking matter and blocking matter in the pressurized air duct are avoided, and the stability and combustion efficiency of the combustor are guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of burners, and in particular relates to a high-stability low-load burner and a control method thereof. Background Art

[0002] The pulverized coal burner has a specially designed multi-stage multi-nozzle air supply guide structure, which can generate high-temperature vortex in the pulverized coal in a short time. It has the advantages of complete combustion, high heat utilization rate, smoke and dust removal, high efficiency and energy saving, improved working conditions, and reduced labor intensity.

[0003] The working principle of the pulverized coal burner is that the pulverized coal is carried by the air flow and ejected outward from the fuel pipeline at a certain diffusion angle, and the combustion-supporting air outside transmits a relatively high momentum and angular momentum. The swirl wind inside mixes with the ejected pulverized coal air flow and spirals forward at high speed, meeting the high-speed axial flow wind beam. The insertion of the axial flow wind beam further enhances the mixing of coal and air (including the surrounding secondary air), and can adjust the degree of divergence of the flame, and can adjust the length and thickness of the flame as needed to achieve the required flame shape.

[0004] Chinese patent CN113654038B discloses a direct current pulverized coal burner, which includes a primary air pulverized coal pipe, a secondary wind box and a pulverized coal concentration separation device, wherein the secondary wind box is sleeved outside the primary air pulverized coal pipe to form a secondary air duct, and the pulverized coal concentration separation device is arranged in the primary air pulverized coal pipe to form a concentrated pulverized coal duct and a light pulverized coal duct, and the concentrated pulverized coal duct, the light pulverized coal duct and the secondary air duct are arranged in sequence from inside to outside along the longitudinal direction of the primary air pulverized coal pipe. However, the granular pulverized coal in the existing burner is easily adsorbed on the inner walls of each duct in the primary air pulverized coal pipe through the primary air pulverized coal pipe, forming coking products and blockages that are difficult to clean, affecting the stability and combustion efficiency of the burner. In view of the above problems, we propose a high-stability low-load burner and a control method thereof. Summary of the invention

[0005] The purpose of the present invention is to address the deficiencies of the prior art and provide a high-stability, low-load burner and a control method thereof, thereby solving the problem that coal powder in the existing burner is easily adsorbed on the inner walls of each air duct in the primary air coal powder pipe as granular coal powder passes through the primary air coal powder pipe, forming coked products and blockages that are difficult to clean, thereby affecting the stability and combustion efficiency of the burner.

[0006] The existing burner coal powder passes through the primary air coal powder pipe, and the granular coal powder is easily adsorbed on the inner walls of each air duct in the primary air coal powder pipe, forming coking products and blockages that are difficult to clean, affecting the stability of the burner and the combustion efficiency. To address the above problems, we have proposed a high-stability, low-load burner and a control method thereof. In short, the high-stability, low-load burner includes a burner mounting seat, a burner body, a combustion ignition component, and an anti-coking mechanism. The burner body includes a feed pipe, a fuel processing pipe, a pressurized air duct and a cyclone dispersion pipe, and the anti-coking mechanism includes a pressurized guide member, a pressurized linkage seat fixedly connected to the pressurized guide member, an auxiliary pressurizing portion, an anti-coking linkage portion, and a coal powder scraper seat. In the embodiment of the present invention, an anti-coking mechanism is provided, and the anti-coking mechanism is driven by the flow of coal powder, thereby realizing the linkage operation of the pressurized flow guide, the pressurized linkage seat, the auxiliary pressurization part, the anti-coking linkage part, and the coal powder scraping seat, realizing the accelerated release of the coal powder in the pressurized air duct, and effectively scraping off the coal powder adsorbed on the inner wall of the pressurized air duct, thereby avoiding the generation of coking materials and blockages in the pressurized air duct, and ensuring the stability and combustion efficiency of the burner. It overcomes the problem that the existing burner coal powder passes through the primary air coal powder pipe and is easily adsorbed on the inner walls of each air duct in the primary air coal powder pipe, forming coking materials and blockages that are difficult to clean, affecting the stability and combustion efficiency of the burner.

[0007] The present invention is achieved by providing a high-stability low-load burner, the high-stability low-load burner comprising:

[0008] Burner mountings;

[0009] A burner body, the burner body is mounted on the burner mounting seat, the burner body comprises a feed pipe, a fuel processing pipe, a pressurized air duct and a cyclone dispersion pipe, the pressurized air duct is sealed and fixedly connected to one end of the fuel processing pipe, the feed pipe is detachably mounted at one end of the fuel processing pipe, and the feed pipe is in conduction with the fuel processing pipe, and the cyclone dispersion pipe is detachably mounted at the end of the pressurized air duct;

[0010] A combustion ignition component, which is arranged in the cyclone dispersion tube and is used to ignite the refined fuel and ensure the low-load stable operation of the coal-fired boiler;

[0011] an anti-coking mechanism, the anti-coking mechanism being arranged in the pressurized air duct, and being used for scraping off the coal powder accumulated in the pressurized air duct and performing auxiliary pressurization treatment on the coal powder;

[0012] Wherein, the anti-coking mechanism comprises:

[0013] A pressurized flow guide, the pressurized flow guide being rotatably mounted in the pressurized air duct;

[0014] A pressurizing linkage seat fixedly connected to the pressurizing guide piece, wherein a pressurizing linkage groove is provided in the pressurizing linkage seat;

[0015] An auxiliary pressurizing part, which is arranged in the pressurizing air duct and is fixedly connected to the pressurizing linkage seat;

[0016] An anti-coking linkage part, the anti-coking linkage part is connected to the pressurizing linkage groove;

[0017] A coal powder scraper seat is slidably installed in the pressurized air duct, and at least one group of scraping guide grooves is opened on the coal powder scraper seat. The anti-coking linkage part is used to drive the coal powder scraper seat, and the coal powder scraper seat is connected to the anti-coking linkage part.

[0018] Preferably, the auxiliary pressurizing unit comprises:

[0019] An expansion mounting seat, the expansion mounting seat being detachably mounted on the end of the pressurizing linkage seat;

[0020] At least one group of pressurized expansion blocks, wherein the pressurized expansion blocks are fixedly mounted on the side walls of the expansion mounting seat, and the pressurized expansion blocks are hollow inside; and

[0021] A coal powder drainage seat is arranged on the end of the expansion mounting seat, and the coal powder drainage seat is used to drain and guide the pressurized coal powder.

[0022] Preferably, the anti-coking linkage unit comprises:

[0023] An anti-coking linkage block, the anti-coking linkage block being slidably embedded in the pressurizing linkage groove;

[0024] An anti-coking swing seat hinged to the anti-coking linkage block, wherein the anti-coking swing seat is rotatably mounted on a swing positioning rod, and the swing positioning rod is fixedly mounted in the pressurized air duct;

[0025] A swing gear seat fixedly mounted on the end of the anti-coking swing seat;

[0026] A linkage rack is slidably mounted in the pressurized air duct, one end of which is fixedly connected to the coal powder scraper seat, and the inner side of the linkage rack is meshed with the swinging gear seat for transmission.

[0027] Preferably, the combustion ignition assembly comprises:

[0028] A main igniter, the main igniter is fixedly installed in the cyclone dispersion tube;

[0029] A driving motor, wherein the driving motor is fixedly installed in the cyclone dispersion tube;

[0030] A discrete linkage part fixedly connected to the output end of the driving motor, the discrete linkage part being arranged in the cyclone discrete tube;

[0031] An adjustable discrete plate connected to the discrete linkage part, the adjustable discrete plate is used to perform discrete flow diversion processing on the coal powder, and at least one group of auxiliary combustion-supporting parts, the auxiliary combustion-supporting parts are arranged in the cyclone discrete tube, and the auxiliary combustion-supporting parts are connected to the discrete linkage part.

[0032] Preferably, the discrete linkage part comprises:

[0033] A first gear, the first gear is rotatably disposed in the cyclone dispersion tube, and one side of the first gear is fixedly connected to an output end of the driving motor;

[0034] Rotating a linkage gear ring disposed in the cyclone dispersion tube, wherein the linkage gear ring is meshed with the first gear for transmission;

[0035] A second gear fixedly mounted on the inner side of the linkage gear ring;

[0036] At least one set of third gears, the third gears are rotatably mounted in the cyclone dispersion tube, the third gears are meshed with the second gears for transmission, and the third gears are detachably connected to the adjustable dispersion plate;

[0037] The fourth gear is fixedly mounted on the outer side wall of the linkage gear ring, and the fourth gear is used to drive the auxiliary combustion-supporting part.

[0038] Preferably, the auxiliary combustion-supporting unit comprises:

[0039] A combustion-supporting pipeline, wherein the combustion-supporting pipeline is opened in the inner wall of the cyclone dispersion tube, and the combustion-supporting pipeline is connected to the combustion-supporting gas tank;

[0040] An outer discrete tube, the outer discrete tube is rotatably mounted on the end of the combustion-supporting pipe, and a fifth gear is fixedly mounted on the side wall of the outer discrete tube, and the fifth gear is meshed with the fourth gear for transmission;

[0041] A gas release tube communicated with the external discrete tube has at least one group of gas release ports formed on its side wall.

[0042] Preferably, it also includes:

[0043] An injection angle adjustment part, the injection angle adjustment part is arranged on the burner mounting seat, the injection angle adjustment part is used to adjust the injection angle of the cyclone dispersion tube, and the injection angle adjustment part is connected to the fuel processing tube;

[0044] Wherein, the injection angle adjustment unit comprises:

[0045] An adjusting motor, wherein the adjusting motor is fixedly mounted in the burner mounting seat;

[0046] An adjusting rotating shaft is fixedly connected to the output end of the adjusting motor, and an end of the adjusting rotating shaft away from the adjusting motor is fixedly connected to a processing tube sleeve seat, and the processing tube sleeve seat is fixedly sleeved on the outer wall of the fuel processing tube;

[0047] An adjustment linkage part, wherein the adjustment linkage part is arranged on the fuel processing pipe;

[0048] A fuel processing assembly is disposed in the fuel processing tube, the fuel processing assembly is connected to the injection angle adjustment part, and the fuel processing assembly is used to crush and refine the fuel;

[0049] Wherein, the fuel processing assembly comprises:

[0050] A pretreatment rod, the pretreatment rod is rotatably mounted in the fuel treatment tube, one end of the pretreatment rod passes through the side wall of the fuel treatment tube and is connected to the adjustment linkage part, and the outer wall of the pretreatment rod is provided with at least one set of pretreatment seats;

[0051] At least one set of fuel crushing knives, wherein the fuel crushing knives are detachably mounted on the pre-processing seat.

[0052] Preferably, the adjustment linkage unit comprises:

[0053] A limiting gear ring, wherein the limiting gear ring is fixedly mounted in the burner mounting seat;

[0054] A sixth gear, the sixth gear is arranged on one side of the limit gear ring, and the sixth gear is meshed with the limit gear ring for transmission;

[0055] A gear connecting rod fixedly connected to the sixth gear, the gear connecting rod is rotatably mounted on a linkage support seat, and the linkage support seat is fixedly mounted on the processing tube sleeve seat;

[0056] A first rotating wheel, the first rotating wheel is fixedly mounted on the end of the gear connecting rod;

[0057] A second rotating wheel is fixedly mounted on the end of the pretreatment rod, and the second rotating wheel is rotationally connected to the first rotating wheel through a transmission belt.

[0058] On the other hand, the present invention also provides a control method for a high-stability low-load burner, the control method for a high-stability low-load burner specifically comprising:

[0059] Obtain the real-time operating parameters of the coal-fired boiler, pre-process the real-time operating parameters, and obtain a state decomposition set;

[0060] Load the state decomposition set, combine the particle swarm optimization algorithm and support vector machine to identify and calculate the state decomposition set, and output the combustion performance index of the coal-fired boiler;

[0061] Obtaining the combustion performance index of the coal-fired boiler, and triggering the burner output adjustment instruction based on the combustion performance index of the coal-fired boiler;

[0062] The high-stability low-load burner responds to the burner output adjustment command and executes the pulverized coal combustion command;

[0063] Among them, the method of identifying and calculating the state decomposition set by combining the particle swarm optimization algorithm and the support vector machine specifically includes:

[0064] Load the state decomposition set, build and train a combustion evaluation model that combines the particle swarm optimization algorithm and the support vector machine. The combustion evaluation model includes a feature extraction layer, a convolution layer, and a fully connected layer. The radial basis function kernel of the support vector machine is introduced into the combustion evaluation model, and the fully connected layer is improved by the particle swarm optimization algorithm to build the combustion evaluation model.

[0065] The combustion evaluation model is executed with the state decomposition set as input. The feature extraction layer of the combustion evaluation model extracts the boiler temperature index, steam flow, nitrogen oxide concentration, pulverized coal flow, and combustion-supporting gas flow in the state decomposition set based on the feature extraction function.

[0066] Among them, the feature extraction function is:

[0067]

[0068] T(x) is the output representation of the feature extraction function, f(x) is the extraction transformation function, x i represents the input quantity of the state decomposition set, n is the amount of data in the state decomposition set, d(x i ,θ i ) is x i and the state decomposition set particle swarm cluster center θ i The second-order norm between , q is the current feature weight;

[0069]

[0070] in, is the mean of the state decomposition set, α represents the extracted transformation coefficient;

[0071] Obtain the feature extraction output representation, perform a convolution operation on the output representation based on the data dimension of the feature, and obtain the convolution result representation;

[0072] The convolution result is:

[0073]

[0074] Among them, J(x) is the convolution result, M is the convolution kernel size, l is the number of convolution layers, β is the convolution expansion base, ω i is the feature convolution receptive field;

[0075] The loaded convolution result indicates that the fully connected layer connects the convolution results of boiler temperature index, steam flow, nitrogen oxide concentration, pulverized coal flow, and combustion-supporting gas flow based on the particle swarm optimization algorithm, and outputs the combustion performance index of the coal-fired boiler.

[0076] The method for executing the pulverized coal combustion instruction specifically includes:

[0077] During operation, when the coal powder enters the feeding pipe and the fuel processing pipe, the adjusting motor is turned on. The starting of the adjusting motor can drive the adjusting rotating shaft to rotate, so that the adjusting rotating shaft drives the processing pipe sleeve and the fuel processing pipe to rotate, thereby realizing the adjustment of the injection angle of the fuel processing pipe and the cyclone dispersion pipe.

[0078] When the adjusting rotating shaft drives the processing tube sleeve seat and the fuel processing tube to rotate, the processing tube sleeve seat drives the linkage supporting seat and the gear connecting rod to rotate, so that the gear connecting rod drives the sixth gear to rotate. When the sixth gear rotates, the limit gear ring meshes with it for transmission, thereby driving the sixth gear, the gear connecting rod and the first wheel to rotate. The rotation of the first wheel drives the second wheel, the pretreatment rod, the pretreatment seat and the fuel crushing knife to rotate, thereby realizing the fine crushing processing of the coal powder.

[0079] During operation, the coal powder enters the pressurized air duct and drives the pressurized guide piece to rotate, so that the pressurized guide piece drives the pressurized linkage seat to rotate, and the pressurized linkage seat drives the pressurized linkage groove to rotate. The pressurized linkage groove intermittently squeezes the anti-coking linkage block, so that the anti-coking linkage block drives the anti-coking swing seat and the swing tooth seat to swing, and the swing tooth seat drives the linkage rack and the coal powder scraper seat to reciprocate in the pressurized air duct, thereby scraping off the coal powder adsorbent in the pressurized air duct.

[0080] When the main igniter is turned on, the coal powder burns and the pressurized expansion block can expand due to the heat when the coal powder burns, thereby expanding outward, thereby increasing the coal powder pressure inside the pressurized air duct, allowing the coal powder to continuously accelerate into the cyclone dispersion tube, and also ensuring the stability of the burner.

[0081] When the main igniter is turned on, the drive motor is started, and the drive motor starts to drive the linkage ring gear, the first gear, the second gear, and the fourth gear to rotate. The rotation of the second gear can drive the third gear and the adjustable discrete plate to rotate, thereby realizing the discrete processing of the coal powder. The rotation of the fourth gear can drive the fifth gear and the outer discrete tube to rotate intermittently, thereby realizing the discrete release of the coal powder and the combustion-supporting gas.

[0082] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0083] In the embodiment of the present invention, an anti-coking mechanism is provided, and the anti-coking mechanism is driven by the flow of coal powder, thereby realizing the linkage operation of the pressurized flow guide, the pressurized linkage seat, the auxiliary pressurization part, the anti-coking linkage part, and the coal powder scraping seat, realizing the accelerated release of the coal powder in the pressurized air duct, and effectively scraping off the coal powder adsorbed on the inner wall of the pressurized air duct, thereby avoiding the generation of coking materials and blockages in the pressurized air duct, and ensuring the stability and combustion efficiency of the burner. It overcomes the problem that the existing burner coal powder passes through the primary air coal powder pipe and is easily adsorbed on the inner walls of each air duct in the primary air coal powder pipe, forming coking materials and blockages that are difficult to clean, affecting the stability and combustion efficiency of the burner.

[0084] In an embodiment of the present invention, an auxiliary pressurizing part is provided, which is composed of a pressurizing expansion block, an expansion mounting seat and a coal powder drainage seat. The pressurizing expansion block arranged on the side wall of the expansion mounting seat can expand due to heat when the coal powder burns, thereby expanding outward, thereby enhancing the coal powder pressure inside the pressurized air duct, so that the coal powder is continuously accelerated into the cyclone dispersion tube, and the stability of the burner is also ensured.

[0085] In an embodiment of the present invention, a combustion ignition assembly is provided, which consists of a main igniter, a discrete linkage part, an adjustable discrete plate and an auxiliary combustion-supporting part. The discrete linkage part, the adjustable discrete plate and the auxiliary combustion-supporting part cooperate with each other to ensure sufficient discrete processing of the coal powder, so that the coal powder is evenly distributed in the furnace, which is beneficial to the uniform combustion of the coal powder and improves the combustion efficiency of the burner.

[0086] In the embodiment of the present invention, a discrete linkage part is provided. The setting of the discrete linkage part realizes the synchronous linkage of the adjustable discrete plate and the auxiliary combustion-supporting part, thereby improving the coal powder combustion efficiency of the combustion and ignition component, reducing the operating difficulty of the combustion and ignition component, and optimizing the coal powder combustion efficiency.

[0087] In the embodiment of the present invention, an injection angle adjustment part and a fuel processing assembly are provided. The setting of the injection angle adjustment part realizes the flexible adjustment of the injection angle of the cyclone discrete tube, further ensuring the stability of the combustion state of the coal-fired boiler. At the same time, when the injection angle of the cyclone discrete tube is adjusted, the injection angle adjustment part can also synchronously drive the fuel processing assembly to operate, so that the fuel processing assembly can synchronously crush and refine the coal powder, thereby improving the coal powder processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0088] Figure 1 It is a structural schematic diagram of a high-stability low-load burner provided by the present invention;

[0089] Figure 2 It is an axonometric diagram of a high stability low load burner provided by the present invention;

[0090] Figure 3is a top view of a high-stability, low-load burner provided by the present invention;

[0091] Figure 4 yes Figure 3 AA section view;

[0092] Figure 5 It is a structural schematic diagram of the anti-coking mechanism provided by the present invention;

[0093] Figure 6 It is a three-dimensional structural schematic diagram of the anti-coking mechanism provided by the present invention;

[0094] Figure 7 is a side view of the anti-coking mechanism provided by the present invention;

[0095] Figure 8 It is a structural schematic diagram of the combustion ignition assembly provided by the present invention;

[0096] Fig. 9 It is a three-dimensional structural schematic diagram of the combustion and ignition assembly provided by the present invention;

[0097] Fig.10 is a side view of the combustion and ignition assembly provided by the present invention;

[0098] Fig.11 yes Fig.10 BB section view;

[0099] Fig.12 yes Figure 8 A is a schematic diagram of the partially enlarged structure of the middle part;

[0100] Fig.13 It is a structural schematic diagram of the injection angle adjustment unit provided by the present invention;

[0101] Fig.14 is an axonometric diagram of the spray angle adjustment unit provided by the present invention;

[0102] Fig.15 is a top view of the spray angle adjustment portion provided by the present invention;

[0103] Fig.16 It is a schematic diagram of the implementation flow of the control method of the high-stability low-load burner provided by the present invention;

[0104] Fig.17 It is a schematic diagram of the implementation flow of the method for identifying and calculating a state decomposition set by combining a particle swarm optimization algorithm and a support vector machine provided by the present invention.

[0105] In the figure: 1-burner mounting seat, 2-injection angle adjustment part, 21-adjusting motor, 22-adjusting rotating shaft, 23-processing tube sleeve seat, 24-adjusting linkage part, 241-limiting gear ring, 242-sixth gear, 243-gear connecting rod, 244-first rotor, 245-second rotor, 246-transmission belt, 247-linkage supporting seat, 3-burner body, 31-feeding pipe, 32-fuel processing pipe, 33-pressurized air duct, 34-cyclone dispersion pipe, 4-fuel processing assembly, 41-pretreatment rod, 42-pretreatment seat, 43-fuel crushing knife, 5-anti-coking mechanism, 51-pressurized guide member, 52-pressurized linkage seat, 53-pressurized linkage groove, 54-anti-coking linkage part, 541-anti-coking linkage block, 542-anti-coking swing seat, 543-swing positioning rod, 544-swing gear seat, 545-linked rack, 55-coal powder scraping seat, 551-scraping guide groove, 56-auxiliary pressurization part, 561-expansion mounting seat, 562-pressurization expansion block, 563-coal powder drainage seat, 6-combustion ignition assembly, 61-drive motor, 62-discrete linkage part, 621-first gear, 622-linked gear ring, 623-second gear, 624-third gear, 625-fourth gear, 63-adjustable discrete plate, 64-main igniter, 65-auxiliary combustion-supporting part, 651-combustion-supporting pipeline, 652-fifth gear, 653-gas release pipe, 654-outer discrete pipe, 655-gas release port. DETAILED DESCRIPTION

[0106] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0107] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present application. The terms used herein in the specification of the application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The terms "including" and "having" in the specification and claims of the present application and the above-mentioned accompanying drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of the present application or the above-mentioned accompanying drawings are used to distinguish different objects, rather than to describe a specific order.

[0108] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0109] In the existing burner, the coal powder passes through the primary air coal powder pipe, and the granular coal powder is easily adsorbed on the inner walls of each air duct in the primary air coal powder pipe, forming coking products and blockages that are difficult to clean, affecting the stability of the burner and the combustion efficiency. In view of the above problems, we have proposed a high-stability, low-load burner and a control method thereof. In short, the high-stability, low-load burner includes a burner mounting seat 1, a burner body 3, a combustion ignition component 6, and an anti-coking mechanism 5. The burner body 3 includes a feed pipe 31, a fuel processing pipe 32, a pressurized air duct 33 and a cyclone discrete pipe 34, and the anti-coking mechanism 5 includes a pressurized guide member 51, a pressurized linkage seat 52 fixedly connected to the pressurized guide member 51, an auxiliary pressurizing portion 56, an anti-coking linkage portion 54, and a coal powder scraping seat 55. In the embodiment of the present invention, an anti-coking mechanism 5 is provided, and the anti-coking mechanism 5 is driven by the flow of coal powder, thereby realizing the linkage operation of the pressurized flow guide 51, the pressurized linkage seat 52, the auxiliary pressurizing part 56, the anti-coking linkage part 54, and the coal powder scraping seat 55, realizing the accelerated release of the coal powder in the pressurized air duct 33, and effectively scraping off the coal powder adsorbed on the inner wall of the pressurized air duct 33, thereby avoiding the generation of coking materials and blockages in the pressurized air duct 33, and ensuring the stability and combustion efficiency of the burner. It overcomes the problem that the existing burner coal powder passes through the primary air coal powder pipe and is easily adsorbed on the inner walls of each air duct in the primary air coal powder pipe, forming coking materials and blockages that are difficult to clean, affecting the stability and combustion efficiency of the burner.

[0110] The embodiment of the present invention provides a high stability low load burner, such as Figure 1-Figure 4 As shown, the high stability low load burner comprises:

[0111] Burner mounting 1.

[0112] It should be noted that the burner mounting seat 1 can be a rectangular seat or an "L"-shaped vertical seat structure, and the burner mounting seat 1 is fixedly mounted on the coal-fired boiler base by fastening bolts or welding.

[0113] The burner body 3 is installed on the burner mounting base 1, and the burner body 3 includes a feed pipe 31, a fuel processing pipe 32, a pressurized air duct 33 and a cyclone dispersion pipe 34. The pressurized air duct 33 is sealed and fixedly connected to one end of the fuel processing pipe 32, the feed pipe 31 is detachably installed at one end of the fuel processing pipe 32, and the feed pipe 31 is connected to the fuel processing pipe 32, and the cyclone dispersion pipe 34 is detachably installed at the end of the pressurized air duct 33.

[0114] In this embodiment, the feed pipe 31, the fuel processing pipe 32, the pressurized air duct 33 and the cyclone dispersion pipe 34 are all made of high-temperature resistant alloy materials, such as copper, stainless steel, or titanium alloy. The feed pipe 31 is connected to a feed air pump, and the feed pipe 31, the fuel processing pipe 32, the pressurized air duct 33 and the cyclone dispersion pipe 34 are all hollow circular tubes or round seat structures. The fuel processing pipe 32 and the pressurized air duct 33 are connected by a flange sealing assembly, and the cyclone dispersion pipe 34 is detachably connected by a snap-fit ​​sealing flange.

[0115] The combustion ignition component 6 is arranged in the cyclone dispersion tube 34, and the combustion ignition component 6 is used to ignite the refined fuel and ensure the stable operation of the coal-fired boiler at low load.

[0116] The anti-coking mechanism 5 is arranged in the pressurized air duct 33, and the anti-coking mechanism 5 is used to scrape the coal powder accumulated in the pressurized air duct 33 and assist in pressurizing the coal powder.

[0117] Among them, Figure 5-Figure 7 As shown, the anti-coking mechanism 5 includes:

[0118] The pressurized air guide 51 is rotatably installed in the pressurized air duct 33 .

[0119] In this embodiment, the pressurized guide member 51 can be a spiral, conical or truncated cone structure. When coal powder passes through the pressurized air duct 33, the coal powder airflow can drive the pressurized guide member 51 to rotate, thereby allowing the pressurized guide member 51 to drive the pressurization linkage seat 52, the auxiliary pressurization part 56 and the anti-coking linkage part 54.

[0120] A pressurized linkage seat 52 is fixedly connected to the pressurized guide member 51, and a pressurized linkage groove 53 is provided in the pressurized linkage seat 52. The pressurized linkage seat 52 and the pressurized guide member 51 are fixedly connected by snapping or plugging, and the pressurized linkage groove 53 is an arc groove or a "U"-shaped groove structure, and the inner wall of the pressurized linkage groove 53 is polished.

[0121] The auxiliary pressurizing portion 56 is disposed in the pressurizing air duct 33 , and the auxiliary pressurizing portion 56 is fixedly connected to the pressurizing linkage seat 52 .

[0122] The anti-coking linkage part 54 is connected to the pressurizing linkage groove 53 .

[0123] The coal powder scraper seat 55 is slidably installed in the pressurized air duct 33. At least one set of scraping guide grooves 551 is opened on the coal powder scraper seat 55. The anti-coking linkage part 54 is used to drive the coal powder scraper seat 55. The coal powder scraper seat 55 is connected to the anti-coking linkage part 54.

[0124] In this embodiment, the coal powder scraper seat 55 is a ring or round seat with a polished surface. The coal powder scraper seat 55 is made of nickel alloy, and the scraping guide grooves 551 are circumferentially arranged on the side walls of the coal powder scraper seat 55. The scraping guide grooves 551 can be circular grooves, diamond grooves or polygonal groove structures.

[0125] In the embodiment of the present invention, an anti-coking mechanism 5 is provided, and the anti-coking mechanism 5 is driven by the flow of coal powder, thereby realizing the linkage operation of the pressurized flow guide 51, the pressurized linkage seat 52, the auxiliary pressurizing part 56, the anti-coking linkage part 54, and the coal powder scraping seat 55, realizing the accelerated release of the coal powder in the pressurized air duct 33, and effectively scraping off the coal powder adsorbed on the inner wall of the pressurized air duct 33, thereby avoiding the generation of coking materials and blockages in the pressurized air duct 33, and ensuring the stability and combustion efficiency of the burner. It overcomes the problem that the existing burner coal powder passes through the primary air coal powder pipe and is easily adsorbed on the inner walls of each air duct in the primary air coal powder pipe, forming coking materials and blockages that are difficult to clean, affecting the stability and combustion efficiency of the burner.

[0126] In a further preferred embodiment of the present invention, Figure 5-Figure 7 As shown, the auxiliary pressurizing portion 56 includes:

[0127] The expansion mounting seat 561 is detachably mounted on the end of the pressurizing linkage seat 52 .

[0128] At least one set of pressurized expansion blocks 562, the pressurized expansion blocks 562 are fixedly mounted on the side wall of the expansion mounting seat 561, and the pressurized expansion blocks 562 are hollow inside. And a coal powder drainage seat 563 is arranged on the end of the expansion mounting seat 561, and the coal powder drainage seat 563 is used to drain and guide the pressurized coal powder.

[0129] In this embodiment, the expansion mounting seat 561 can be a circular seat or a rectangular seat structure with a hollow interior, and the pressurized expansion blocks 562 are circumferentially arranged on the side walls of the expansion mounting seat 561. The pressurized expansion blocks 562 are made of a material that is easy to expand when heated. The pressurized expansion blocks 562 are provided with folds inside to facilitate the expansion of the pressurized expansion blocks 562 when heated. The coal powder drainage seat 563 is fixedly mounted on the end wall of the expansion mounting seat 561 by welding or riveting. The coal powder drainage seat 563 can be a truncated cone or conical structure, and its outer wall is polished.

[0130] In the embodiment of the present invention, an auxiliary pressurizing portion 56 is provided, and the auxiliary pressurizing portion 56 is composed of a pressurizing expansion block 562, an expansion mounting seat 561 and a coal powder drainage seat 563. The pressurizing expansion block 562 arranged on the side wall of the expansion mounting seat 561 can expand due to heat when the coal powder burns, thereby expanding outward, thereby achieving the enhancement of the coal powder pressure inside the pressurized air duct 33, so that the coal powder is continuously accelerated to enter the cyclone dispersion tube 34, and the stability of the burner is also ensured.

[0131] In a further preferred embodiment of the present invention, Figure 5-Figure 6 As shown, the anti-coking linkage unit 54 includes:

[0132] The anti-coking linkage block 541 is slidably embedded in the pressurized linkage groove 53, and the anti-coking linkage block 541 can be a columnar block or a spherical block.

[0133] The anti-coking swing seat 542 is hinged to the anti-coking linkage block 541 , and the anti-coking swing seat 542 is rotatably mounted on a swing positioning rod 543 , and the swing positioning rod 543 is fixedly mounted in the pressurized air duct 33 .

[0134] A swing gear seat 544 is fixedly mounted on the end of the anti-coking swing seat 542.

[0135] A linkage rack 545 is slidably mounted in the pressurized air duct 33 , one end of which is fixedly connected to the coal powder scraper seat 55 , and the inner side of the linkage rack 545 is also meshed with the swinging gear seat 544 for transmission.

[0136] In this embodiment, the swing gear seat 544 and the end of the anti-coking swing seat 542 are welded or riveted, and the linkage rack 545 and the coal powder scraping seat 55 are riveted or clamped.

[0137] During operation, the coal powder enters the pressurized air duct 33 and drives the pressurized guide member 51 to rotate, so that the pressurized guide member 51 drives the pressurized linkage seat 52 to rotate, and the pressurized linkage seat 52 drives the pressurized linkage groove 53 to rotate. The pressurized linkage groove 53 intermittently squeezes the anti-coking linkage block 541, so that the anti-coking linkage block 541 drives the anti-coking swing seat 542 and the swing tooth seat 544 to swing, and the swing tooth seat 544 drives the linkage rack 545 and the coal powder scraping seat 55 to move back and forth in the pressurized air duct 33, so as to scrape off the coal powder adsorbent in the pressurized air duct 33.

[0138] When the main igniter 64 is turned on, the coal powder burns, and the pressurized expansion block 562 can expand due to the heat when the coal powder burns, thereby expanding outward, thereby strengthening the coal powder pressure inside the pressurized air duct 33, allowing the coal powder to continuously accelerate into the cyclone dispersion tube 34, and also ensuring the stability of the burner.

[0139] In a further preferred embodiment of the present invention, Figure 8-Figure 11 As shown, the combustion ignition assembly 6 includes:

[0140] A main igniter 64 is fixedly installed in the cyclone dispersion tube 34 .

[0141] The main igniter 64 is fixedly installed at the axial position of the cyclone dispersion tube 34 by mortise and tenon or snap-on connection. The model of the main igniter 64 can be RS820, TRS820P, TRS818, TRS818P, TRS830, TRS830P, etc.

[0142] The drive motor 61 is fixedly installed in the cyclone dispersion tube 34. In order to ensure the high temperature resistance of the drive motor 61, a heat insulation cover is provided on the outer wall of the drive motor 61. The drive motor 61 is fixedly installed on the inner wall of the cyclone dispersion tube 34 by welding or riveting.

[0143] The discrete linkage part 62 is fixedly connected to the output end of the driving motor 61 , and the discrete linkage part 62 is arranged in the cyclone discrete tube 34 .

[0144] An adjustable discrete plate 63 connected to the discrete linkage part 62, the adjustable discrete plate 63 is used to perform discrete flow diversion processing on the coal powder, and at least one group of auxiliary combustion-supporting parts 65, the auxiliary combustion-supporting parts 65 are arranged in the cyclone discrete tube 34, and the auxiliary combustion-supporting parts 65 are connected to the discrete linkage part 62.

[0145] In this embodiment, the adjustable discrete plates 63 are circumferentially arranged in the cyclone discrete tube 34, and the shapes of the adjustable discrete plates 63 include but are not limited to triangular plates, arc plates, rectangular plates, fan-shaped plates, and spiral plate structures. The setting of the adjustable discrete plates 63 further realizes the discrete refinement of the coal powder, so that the coal powder is evenly distributed in the furnace, which is beneficial to the uniform combustion of the coal powder and improves the combustion efficiency of the burner.

[0146] In the embodiment of the present invention, a combustion ignition assembly 6 is provided, and the combustion ignition assembly 6 is composed of a main igniter 64, a discrete linkage part 62, an adjustable discrete plate 63 and an auxiliary combustion-supporting part 65. The discrete linkage part 62, the adjustable discrete plate 63 and the auxiliary combustion-supporting part 65 cooperate with each other to ensure sufficient discrete processing of the coal powder, so that the coal powder is evenly distributed in the furnace, which is beneficial to the uniform combustion of the coal powder and improves the combustion efficiency of the burner.

[0147] In a further preferred embodiment of the present invention, Figure 8-Figure 10 As shown, the discrete linkage part 62 includes:

[0148] The first gear 621 is rotatably disposed in the cyclone dispersion tube 34 , one side of the first gear 621 is fixedly connected to the output end of the drive motor 61 , and the first gear 621 is fixedly connected to the output end of the drive motor 61 by welding or interference fit.

[0149] The linkage gear ring 622 disposed in the cyclone dispersion tube 34 is rotated, and the linkage gear ring 622 is meshed with the first gear 621 for transmission.

[0150] A second gear 623 is fixedly mounted on the inner side of the linkage gear ring 622 .

[0151] At least one set of third gears 624 is rotatably mounted in the cyclone discrete tube 34 , the third gears 624 are meshed with the second gears 623 for transmission, and the third gears 624 are detachably connected to the adjustable discrete plate 63 .

[0152] It should be noted that the linkage gear ring 622 is rotatably connected to the inner wall of the cyclone discrete tube 34 by means of bearings or rollers, the second gear 623 and the fourth gear 625 are fixedly installed on the outer wall of the linkage gear ring 622 by means of welding or riveting, and the third gear 624 is fixedly connected to the adjustable discrete plate 63 by means of plug-in or snap-on.

[0153] The fourth gear 625 is fixedly mounted on the outer wall of the linkage gear ring 622 , and the fourth gear 625 is used to drive the auxiliary combustion-supporting part 65 .

[0154] In the embodiment of the present invention, a discrete linkage part 62 is provided. The setting of the discrete linkage part 62 realizes the synchronous linkage of the adjustable discrete plate 63 and the auxiliary combustion part 65, thereby improving the coal powder combustion efficiency of the combustion ignition component 6, reducing the operating difficulty of the combustion ignition component 6, and optimizing the coal powder combustion efficiency.

[0155] In a further preferred embodiment of the present invention, Fig.12 As shown, the auxiliary combustion-supporting unit 65 includes:

[0156] The combustion-supporting pipeline 651 is opened in the inner wall of the cyclone dispersion tube 34, and the combustion-supporting pipeline 651 is connected to the combustion-supporting gas tank.

[0157] It should be noted that the combustion-supporting gas includes but is not limited to oxygen, argon or a combination of the two, and the combustion-supporting pipe 651 is circumferentially arranged in the inner wall of the cyclone dispersion tube 34.

[0158] The outer discrete tube 654 is rotatably mounted on the end of the combustion-supporting pipe 651 , and a fifth gear 652 is fixedly sleeved on the side wall of the outer discrete tube 654 , and the fifth gear 652 is meshed with the fourth gear 625 for transmission.

[0159] The gas release tube 653 communicates with the outer discrete tube 654 , and has at least one group of gas release ports 655 formed on its side wall.

[0160] In this embodiment, the outer discrete tube 654 is hollow inside, and one end of the outer discrete tube 654 is rotatably connected to the combustion-supporting pipe 651 through a bearing or a roller. The fifth gear 652 can be an incomplete gear of half, one third or one quarter. The fifth gear 652 is fixedly mounted on the outer wall of the outer discrete tube 654 by welding or riveting. The outer discrete tube 654 can be a spiral structure. The setting of the outer discrete tube 654 further improves the dispersion efficiency of coal powder and combustion-supporting gas.

[0161] During operation, when the main igniter 64 is turned on, the drive motor 61 is started, and the drive motor 61 starts to drive the linkage ring gear 622, the first gear 621, the second gear 623, and the fourth gear 625 to rotate. The rotation of the second gear 623 can drive the third gear 624 and the adjustable discrete plate 63 to rotate, thereby realizing the discrete processing of the coal powder. The rotation of the fourth gear 625 can drive the fifth gear 652 and the outer discrete tube 654 to rotate intermittently, thereby realizing the discrete release of the coal powder and the combustion-supporting gas.

[0162] In a further preferred embodiment of the present invention, Figure 13-Figure 15 As shown, the embodiment of the present invention also includes:

[0163] The injection angle adjustment part 2 is arranged on the burner mounting seat 1 . The injection angle adjustment part 2 is used to adjust the injection angle of the cyclone dispersion tube 34 . The injection angle adjustment part 2 is connected to the fuel processing tube 32 .

[0164] Wherein, the injection angle adjustment unit 2 comprises:

[0165] The regulating motor 21 is fixedly mounted in the burner mounting seat 1 .

[0166] The adjusting rotating shaft 22 is fixedly connected to the output end of the adjusting motor 21 . The end of the adjusting rotating shaft 22 away from the adjusting motor 21 is fixedly connected to a processing tube sleeve seat 23 . The processing tube sleeve seat 23 is fixedly sleeved on the outer wall of the fuel processing tube 32 .

[0167] It should be noted that the adjusting motor 21 can be a servo motor, which is embedded in the burner mounting base 1 by welding or clipping, and the output end of the adjusting motor 21 is fixedly connected to the end of the adjusting rotating shaft 22 by welding or riveting, and the adjusting rotating shaft 22 is rotatably connected to the burner mounting base 1 through a bearing, and the end of the adjusting rotating shaft 22 away from the adjusting motor 21 is fixedly connected to the processing tube sleeve seat 23 by welding or plugging, and the processing tube sleeve seat 23 is fixedly connected to the outer wall of the fuel processing tube 32 by clipping or riveting.

[0168] During operation, when the coal powder enters the feed pipe 31 and the fuel processing pipe 32, the adjusting motor 21 is turned on. The starting of the adjusting motor 21 can drive the adjusting rotating shaft 22 to rotate, so that the adjusting rotating shaft 22 drives the processing pipe sleeve 23 and the fuel processing pipe 32 to rotate, thereby realizing the adjustment of the injection angle of the fuel processing pipe 32 and the cyclone dispersion pipe 34.

[0169] The adjusting linkage part 24 is arranged on the fuel processing pipe 32 .

[0170] The fuel processing assembly 4 is arranged in the fuel processing pipe 32, and the fuel processing assembly 4 is connected to the injection angle adjustment part 2. The fuel processing assembly 4 is used to crush and refine the fuel.

[0171] In the embodiment of the present invention, an injection angle adjustment part 2 and a fuel processing assembly 4 are provided. The setting of the injection angle adjustment part 2 realizes the flexible adjustment of the injection angle of the cyclone discrete tube 34, further ensuring the stability of the combustion state of the coal-fired boiler. At the same time, when the injection angle of the cyclone discrete tube 34 is adjusted, the injection angle adjustment part 2 can also synchronously drive the fuel processing assembly 4 to operate, so that the fuel processing assembly 4 can synchronously crush and refine the coal powder, thereby improving the coal powder processing efficiency.

[0172] Wherein, the fuel processing assembly 4 comprises:

[0173] The pretreatment rod 41 is rotatably mounted in the fuel treatment tube 32. One end of the pretreatment rod 41 passes through the side wall of the fuel treatment tube 32 and is connected to the adjustment linkage part 24. The outer wall of the pretreatment rod 41 is provided with at least one set of pretreatment seats 42.

[0174] At least one set of fuel crushing knives 43 , wherein the fuel crushing knives 43 are detachably mounted on the pre-processing seat 42 .

[0175] In this embodiment, the pretreatment rod 41 is rotatably connected to the side wall of the fuel treatment tube 32 by means of bearings or rollers, the pretreatment seat 42 is linearly arranged on the pretreatment rod 41, and the fuel crushing knife 43 is rectangular, conical, fan-shaped or diamond-shaped. The fuel crushing knife 43 is fixedly installed on the side wall of the pretreatment seat 42 by welding or clamping.

[0176] In a further preferred embodiment of the present invention, Figure 13-14 As shown, the adjustment linkage part 24 includes:

[0177] The limiting gear ring 241 is fixedly installed in the burner mounting seat 1.

[0178] The sixth gear 242 is disposed on one side of the limiting gear ring 241 , and the sixth gear 242 is meshed with the limiting gear ring 241 for transmission.

[0179] The gear connecting rod 243 is fixedly connected to the sixth gear 242 , and the gear connecting rod 243 is rotatably mounted on a linkage support seat 247 , and the linkage support seat 247 is fixedly mounted on the processing tube sleeve seat 23 .

[0180] The first rotating wheel 244 is fixedly mounted on the end of the gear connecting rod 243 .

[0181] The second rotating wheel 245 is fixedly mounted on the end of the pre-processing rod 41 , and the second rotating wheel 245 is rotationally connected to the first rotating wheel 244 via a transmission belt 246 .

[0182] In this embodiment, the limiting gear ring 241 is fixedly installed in the burner mounting base 1 by welding or mortise and tenon joints, the sixth gear 242 can be a bevel gear, and the two ends of the gear connecting rod 243 are fixedly connected to the sixth gear 242 and the first rotating wheel 244 by mortise and tenon joints or plug-in joints respectively. The gear connecting rod 243 is rotatably connected to the linkage support seat 247 through a bearing, and the linkage support seat 247 is fixedly installed on the processing tube sleeve seat 23 by welding or riveting. The second rotating wheel 245 is fixedly connected to the end of the pretreatment rod 41 by snap-fitting or mortise and tenon joints.

[0183] When the adjusting rotating shaft 22 drives the processing tube sleeve seat 23 and the fuel processing tube 32 to rotate, the processing tube sleeve seat 23 drives the linkage supporting seat 247 and the gear connecting rod 243 to rotate, so that the gear connecting rod 243 drives the sixth gear 242 to rotate. When the sixth gear 242 rotates, the limit gear ring 241 meshes with it for transmission, thereby driving the sixth gear 242, the gear connecting rod 243 and the first rotating wheel 244 to rotate. The rotation of the first rotating wheel 244 drives the second rotating wheel 245, the pre-processing rod 41, the pre-processing seat 42 and the fuel crushing knife 43 to rotate, thereby realizing the fine crushing processing of the coal powder.

[0184] On the other hand, in an embodiment of the present invention, a control method for a high-stability low-load burner is provided. Fig.16 The schematic diagram of the implementation flow of the high stability low load burner control method is shown, and the high stability low load burner control method specifically includes:

[0185] Step S10, obtaining real-time operating parameters of the coal-fired boiler, preprocessing the real-time operating parameters, and obtaining a state decomposition set.

[0186] Step S20, loading the state decomposition set, combining the particle swarm optimization algorithm and the support vector machine to perform identification calculation on the state decomposition set, and outputting the combustion performance index of the coal-fired boiler.

[0187] Step S30, obtaining a combustion performance index of the coal-fired boiler, and triggering a burner output adjustment instruction based on the combustion performance index of the coal-fired boiler.

[0188] Step S40: the high-stability low-load burner executes the pulverized coal combustion instruction in response to the burner output adjustment instruction.

[0189] In a further preferred embodiment of the present invention, Fig.17 As shown, the method of identifying and calculating the state decomposition set by combining the particle swarm optimization algorithm and the support vector machine specifically includes:

[0190] Step S101, load the state decomposition set, build and train a combustion evaluation model combining a particle swarm optimization algorithm and a support vector machine, the combustion evaluation model includes a feature extraction layer, a convolution layer, and a fully connected layer, and introduces a radial basis function kernel of the support vector machine into the combustion evaluation model, improves the fully connected layer through the particle swarm optimization algorithm, and builds the combustion evaluation model.

[0191] Step S102, taking the state decomposition set as input, executing the combustion evaluation model, the feature extraction layer of the combustion evaluation model extracts the boiler temperature index, steam flow, nitrogen oxide concentration, pulverized coal flow, and combustion-supporting gas flow in the state decomposition set based on the feature extraction function.

[0192] Among them, the feature extraction function is:

[0193]

[0194] T(x) is the output representation of the feature extraction function, f(x) is the extraction transformation function, x i represents the input quantity of the state decomposition set, n is the amount of data in the state decomposition set, d(x i ,θ i ) is x i and the state decomposition set particle swarm cluster center θ iThe second-order norm between , q is the current feature weight, and the feature weight is assigned based on the principal component analysis method.

[0195]

[0196] in, is the mean of the state decomposition set, and α represents the extracted transformation coefficient.

[0197] Step S103, obtaining a feature extraction output representation, performing a convolution operation on the output representation based on the data dimension of the feature, and obtaining a convolution result representation.

[0198] The convolution result is:

[0199]

[0200] Wherein, J(x) is the convolution result representation, M is the convolution kernel size, l is the number of convolution layers, β is the convolution expansion base, in this embodiment, the convolution expansion base can be 2-4, ω i is the feature convolution receptive field.

[0201] Step S104, loading the convolution result representation, the fully connected layer connects the convolution results of the boiler temperature index, steam flow, nitrogen oxide concentration, pulverized coal flow, and combustion-supporting gas flow based on the particle swarm optimization algorithm, and outputs the combustion performance index of the coal-fired boiler.

[0202] In this embodiment, the method for executing the pulverized coal combustion instruction specifically includes:

[0203] Step S201, during operation, when the coal powder enters the feed pipe 31 and the fuel processing pipe 32, the adjusting motor 21 is turned on. The starting of the adjusting motor 21 can drive the adjusting rotating shaft 22 to rotate, so that the adjusting rotating shaft 22 drives the processing pipe sleeve 23 and the fuel processing pipe 32 to rotate, thereby realizing the adjustment of the injection angle of the fuel processing pipe 32 and the cyclone discrete pipe 34.

[0204] Step S202, when the rotating shaft 22 is adjusted to drive the processing tube sleeve seat 23 and the fuel processing tube 32 to rotate, the processing tube sleeve seat 23 drives the linkage support seat 247 and the gear connecting rod 243 to rotate, so that the gear connecting rod 243 drives the sixth gear 242 to rotate, and when the sixth gear 242 rotates, the limit gear ring 241 engages with it for transmission, thereby driving the sixth gear 242, the gear connecting rod 243 and the first rotating wheel 244 to rotate, and the rotation of the first rotating wheel 244 drives the second rotating wheel 245, the pre-processing rod 41, the pre-processing seat 42 and the fuel crushing knife 43 to rotate, so as to realize the fine crushing processing of the coal powder.

[0205] Step S203, during operation, the coal powder enters the pressurized air duct 33 and drives the pressurized guide member 51 to rotate, so that the pressurized guide member 51 drives the pressurized linkage seat 52 to rotate, and the pressurized linkage seat 52 drives the pressurized linkage groove 53 to rotate, and the pressurized linkage groove 53 intermittently squeezes the anti-coking linkage block 541, so that the anti-coking linkage block 541 drives the anti-coking swing seat 542 and the swing tooth seat 544 to swing, and the swing tooth seat 544 drives the linkage rack 545 and the coal powder scraping seat 55 to reciprocate in the pressurized air duct 33, so as to scrape off the coal powder adsorbent in the pressurized air duct 33.

[0206] In step S204, when the main igniter 64 is turned on, the coal powder burns and the pressurized expansion block 562 can expand due to the heat when the coal powder burns, thereby expanding outward, thereby strengthening the coal powder pressure inside the pressurized air duct 33, so that the coal powder is continuously accelerated to enter the cyclone dispersion tube 34, and the stability of the burner is also ensured.

[0207] Step S205, when the main igniter 64 is turned on, the drive motor 61 is started, and the drive motor 61 starts to drive the linkage ring gear 622, the first gear 621, the second gear 623, and the fourth gear 625 to rotate. The rotation of the second gear 623 can drive the third gear 624 and the adjustable discrete plate 63 to rotate, thereby realizing the discrete processing of the coal powder. The rotation of the fourth gear 625 can drive the fifth gear 652 and the outer discrete tube 654 to rotate intermittently, thereby realizing the discrete release of the coal powder and the combustion-supporting gas.

[0208] In summary, the present invention provides a high-stability low-load burner and a control method thereof. In the embodiment of the present invention, an anti-coking mechanism 5 is provided, and the anti-coking mechanism 5 is driven by the flow of coal powder, thereby realizing the linkage operation of the pressurized flow guide 51, the pressurized linkage seat 52, the auxiliary pressurization part 56, the anti-coking linkage part 54, and the coal powder scraping seat 55, realizing the accelerated release of the coal powder in the pressurized air duct 33, and effectively scraping off the coal powder adsorbed on the inner wall of the pressurized air duct 33, thereby avoiding the generation of coking materials and blockages in the pressurized air duct 33, and ensuring the stability and combustion efficiency of the burner. It overcomes the problem that the existing burner coal powder passes through the primary air coal powder pipe and is easily adsorbed on the inner walls of each air duct in the primary air coal powder pipe, forming coking materials and blockages that are difficult to clean, affecting the stability and combustion efficiency of the burner.

[0209] It should be noted that, for the above-mentioned embodiments, for the sake of simplicity, they are all described as a series of action combinations, but those skilled in the art should know that the present invention is not limited by the described order of actions, because according to the present invention, some steps may be performed in other orders or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

[0210] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the scope of protection of the invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on these embodiments, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in this field can still combine, add, delete or make other adjustments to the features in the various embodiments of the present invention according to the circumstances without conflict, without making creative work, so as to obtain different other technical solutions that do not deviate from the concept of the present invention in essence, and these technical solutions also belong to the scope of protection of the present invention.

Claims

1. A high-stability, low-load burner, comprising: Burner mountings; A burner body, the burner body is mounted on the burner mounting seat, characterized in that the burner body comprises a feed pipe, a fuel processing pipe, a pressurized air duct and a cyclone dispersion pipe, the pressurized air duct is sealed and fixedly connected to one end of the fuel processing pipe, the feed pipe is detachably mounted on one end of the fuel processing pipe, and the feed pipe is in conduction with the fuel processing pipe, and the cyclone dispersion pipe is detachably mounted on the end of the pressurized air duct; A combustion ignition component, which is arranged in the cyclone dispersion tube and is used to ignite the refined fuel and ensure the low-load stable operation of the coal-fired boiler; an anti-coking mechanism, the anti-coking mechanism being arranged in the pressurized air duct, and being used for scraping off the coal powder accumulated in the pressurized air duct and performing auxiliary pressurization treatment on the coal powder; Wherein, the anti-coking mechanism comprises: A pressurized flow guide, the pressurized flow guide being rotatably mounted in the pressurized air duct; A pressurizing linkage seat fixedly connected to the pressurizing guide piece, wherein a pressurizing linkage groove is provided in the pressurizing linkage seat; An auxiliary pressurizing part, which is arranged in the pressurizing air duct and is fixedly connected to the pressurizing linkage seat; An anti-coking linkage part, the anti-coking linkage part is connected to the pressurizing linkage groove; A coal powder scraper seat is slidably installed in the pressurized air duct, and at least one group of scraping guide grooves is opened on the coal powder scraper seat. The anti-coking linkage part is used to drive the coal powder scraper seat, and the coal powder scraper seat is connected to the anti-coking linkage part.

2. The high stability low load burner according to claim 1, characterized in that: The auxiliary pressurizing unit comprises: An expansion mounting seat, the expansion mounting seat being detachably mounted on the end of the pressurizing linkage seat; At least one group of pressurized expansion blocks, wherein the pressurized expansion blocks are fixedly mounted on the side walls of the expansion mounting seat, and the pressurized expansion blocks are hollow inside; and A coal powder drainage seat is arranged on the end of the expansion mounting seat, and the coal powder drainage seat is used to drain and guide the pressurized coal powder.

3. The high stability low load burner according to claim 1, characterized in that: The anti-coking linkage unit comprises: An anti-coking linkage block, the anti-coking linkage block being slidably embedded in the pressurizing linkage groove; An anti-coking swing seat hinged to the anti-coking linkage block, wherein the anti-coking swing seat is rotatably mounted on a swing positioning rod, and the swing positioning rod is fixedly mounted in the pressurized air duct; A swing gear seat fixedly mounted on the end of the anti-coking swing seat; A linkage rack is slidably mounted in the pressurized air duct, one end of which is fixedly connected to the coal powder scraper seat, and the inner side of the linkage rack is meshed with the swinging gear seat for transmission.

4. The high stability low load burner according to claim 3, characterized in that: The combustion ignition assembly comprises: A main igniter, the main igniter is fixedly installed in the cyclone dispersion tube; A driving motor, wherein the driving motor is fixedly installed in the cyclone dispersion tube; A discrete linkage part fixedly connected to the output end of the driving motor, the discrete linkage part being arranged in the cyclone discrete tube; An adjustable discrete plate connected to the discrete linkage part, the adjustable discrete plate is used to perform discrete flow diversion processing on the coal powder, and at least one group of auxiliary combustion-supporting parts, the auxiliary combustion-supporting parts are arranged in the cyclone discrete tube, and the auxiliary combustion-supporting parts are connected to the discrete linkage part.

5. The high stability low load burner according to claim 4, characterized in that: The discrete linkage unit comprises: A first gear, the first gear is rotatably disposed in the cyclone dispersion tube, and one side of the first gear is fixedly connected to an output end of the driving motor; Rotating a linkage gear ring disposed in the cyclone dispersion tube, wherein the linkage gear ring is meshed with the first gear for transmission; A second gear fixedly mounted on the inner side of the linkage gear ring; At least one set of third gears, the third gears are rotatably mounted in the cyclone dispersion tube, the third gears are meshed with the second gears for transmission, and the third gears are detachably connected to the adjustable dispersion plate; The fourth gear is fixedly mounted on the outer side wall of the linkage gear ring, and the fourth gear is used to drive the auxiliary combustion-supporting part.

6. The high stability low load burner according to claim 5, characterized in that: The auxiliary combustion-supporting part comprises: A combustion-supporting pipeline, wherein the combustion-supporting pipeline is disposed in the inner wall of the cyclone dispersion tube and is connected to the combustion-supporting gas tank; An outer discrete tube, the outer discrete tube is rotatably mounted on the end of the combustion-supporting pipe, and a fifth gear is fixedly mounted on the side wall of the outer discrete tube, and the fifth gear is meshed with the fourth gear for transmission; A gas release tube communicated with the external discrete tube has at least one group of gas release ports formed on its side wall.

7. The high stability low load burner according to claim 1, characterized in that: Also includes: An injection angle adjustment part, the injection angle adjustment part is arranged on the burner mounting seat, the injection angle adjustment part is used to adjust the injection angle of the cyclone dispersion tube, and the injection angle adjustment part is connected to the fuel processing tube; Wherein, the injection angle adjustment unit comprises: An adjusting motor, wherein the adjusting motor is fixedly mounted in the burner mounting seat; An adjusting rotating shaft is fixedly connected to the output end of the adjusting motor, and an end of the adjusting rotating shaft away from the adjusting motor is fixedly connected to a processing tube sleeve seat, and the processing tube sleeve seat is fixedly sleeved on the outer wall of the fuel processing tube; An adjustment linkage part, wherein the adjustment linkage part is arranged on the fuel processing pipe; A fuel processing assembly is disposed in the fuel processing tube, the fuel processing assembly is connected to the injection angle adjustment part, and the fuel processing assembly is used to crush and refine the fuel; Wherein, the fuel processing assembly comprises: A pretreatment rod, the pretreatment rod is rotatably mounted in the fuel treatment tube, one end of the pretreatment rod passes through the side wall of the fuel treatment tube and is connected to the adjustment linkage part, and the outer wall of the pretreatment rod is provided with at least one set of pretreatment seats; At least one set of fuel crushing knives, wherein the fuel crushing knives are detachably mounted on the pre-processing seat.

8. The high stability low load burner according to claim 7, characterized in that: The adjustment linkage unit comprises: A limiting gear ring, wherein the limiting gear ring is fixedly mounted in the burner mounting seat; A sixth gear, the sixth gear is arranged on one side of the limit gear ring, and the sixth gear is meshed with the limit gear ring for transmission; A gear connecting rod fixedly connected to the sixth gear, the gear connecting rod is rotatably mounted on a linkage support seat, and the linkage support seat is fixedly mounted on the processing tube sleeve seat; A first rotating wheel, the first rotating wheel is fixedly mounted on the end of the gear connecting rod; A second rotating wheel is fixedly mounted on the end of the pretreatment rod, and the second rotating wheel is rotationally connected to the first rotating wheel through a transmission belt.

9. A control method for a high-stability low-load burner, implemented by using the high-stability low-load burner according to any one of claims 1 to 8, characterized in that: The control method of the high-stability low-load burner specifically includes: Obtain the real-time operating parameters of the coal-fired boiler, pre-process the real-time operating parameters, and obtain a state decomposition set; Load the state decomposition set, combine the particle swarm optimization algorithm and support vector machine to identify and calculate the state decomposition set, and output the combustion performance index of the coal-fired boiler; Obtaining the combustion performance index of the coal-fired boiler, and triggering the burner output adjustment instruction based on the combustion performance index of the coal-fired boiler; The high-stability low-load burner responds to the burner output adjustment command and executes the pulverized coal combustion command; Among them, the method of identifying and calculating the state decomposition set by combining the particle swarm optimization algorithm and the support vector machine specifically includes: Load the state decomposition set, build and train a combustion evaluation model that combines the particle swarm optimization algorithm and the support vector machine. The combustion evaluation model includes a feature extraction layer, a convolution layer, and a fully connected layer. The radial basis function kernel of the support vector machine is introduced into the combustion evaluation model, and the fully connected layer is improved by the particle swarm optimization algorithm to build the combustion evaluation model. The combustion evaluation model is executed with the state decomposition set as input. The feature extraction layer of the combustion evaluation model extracts the boiler temperature index, steam flow, nitrogen oxide concentration, pulverized coal flow, and combustion-supporting gas flow in the state decomposition set based on the feature extraction function. Among them, the feature extraction function is: T(x) is the output representation of the feature extraction function, f(x) is the extraction transformation function, x i represents the input quantity of the state decomposition set, n is the amount of data in the state decomposition set, d(x i ,θ i ) is x i and the state decomposition set particle swarm cluster center θ i The second-order norm between , q is the current feature weight; in, is the mean of the state decomposition set, α represents the extracted transformation coefficient; Obtain the feature extraction output representation, perform a convolution operation on the output representation based on the data dimension of the feature, and obtain the convolution result representation; The convolution result is: Among them, J(x) is the convolution result, M is the convolution kernel size, l is the number of convolution layers, β is the convolution expansion base, ω i is the feature convolution receptive field; The loaded convolution result indicates that the fully connected layer connects the convolution results of boiler temperature index, steam flow, nitrogen oxide concentration, pulverized coal flow, and combustion-supporting gas flow based on the particle swarm optimization algorithm, and outputs the combustion performance index of the coal-fired boiler.

10. The control method of a high stability low load burner according to claim 9, characterized in that: The method for executing the pulverized coal combustion instruction specifically includes: During operation, when the coal powder enters the feeding pipe and the fuel processing pipe, the regulating motor is turned on, and the regulating motor is started to drive the regulating rotating shaft to rotate, so that the regulating rotating shaft drives the processing pipe sleeve and the fuel processing pipe to rotate, thereby realizing the adjustment of the injection angle of the fuel processing pipe and the cyclone dispersion pipe; When the adjusting rotating shaft drives the processing tube sleeve seat and the fuel processing tube to rotate, the processing tube sleeve seat drives the linkage support seat and the gear connecting rod to rotate, so that the gear connecting rod drives the sixth gear to rotate. When the sixth gear rotates, the limit gear ring meshes with it for transmission, thereby driving the sixth gear, the gear connecting rod and the first runner to rotate. The rotation of the first runner drives the second runner, the pre-processing rod, the pre-processing seat and the fuel crushing knife to rotate, thereby realizing the fine crushing of the coal powder; During operation, the coal powder enters the pressurized air duct and drives the pressurized flow guide to rotate, so that the pressurized flow guide drives the pressurized linkage seat to rotate, and the pressurized linkage seat drives the pressurized linkage groove to rotate, and the pressurized linkage groove intermittently squeezes the anti-coking linkage block, so that the anti-coking linkage block drives the anti-coking swing seat and the swing tooth seat to swing, and the swing tooth seat drives the linkage rack and the coal powder scraping seat to reciprocate in the pressurized air duct, so as to scrape off the coal powder adsorbed matter in the pressurized air duct; When the main igniter is turned on, the pulverized coal burns and the pressurized expansion block can expand due to the heat when the pulverized coal burns, thereby expanding outward, thereby strengthening the pulverized coal pressure inside the pressurized air duct, so that the pulverized coal continues to accelerate into the cyclone dispersion tube, and also ensures the stability of the burner; When the main igniter is turned on, the drive motor is started, and the drive motor starts to drive the linkage ring gear, the first gear, the second gear, and the fourth gear to rotate. The rotation of the second gear can drive the third gear and the adjustable discrete plate to rotate, thereby realizing the discrete processing of the coal powder. The rotation of the fourth gear can drive the fifth gear and the outer discrete tube to rotate intermittently, thereby realizing the discrete release of the coal powder and the combustion-supporting gas.

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