Premixing burner of boiler

Abstract

The invention discloses a premixing burner of a boiler, and belongs to the technical field of premixing burners. A premixing combustor of a boiler comprises a combustion head fixed to the end of a premixing device, a conveying assembly for conveying mixed gas into the combustion head in a segmented mode is arranged in the combustion head and comprises a plurality of conveying pipes fixed to the surface of a turbofan, the conveying pipes are divided into a plurality of groups, the lengths of the conveying pipes in each group are different, and the conveying pipes in each group are different. The conveying device is used for conveying mixed gas into the combustion head in a sectional manner; by arranging the conveying assembly, under the action of the multiple sets of conveying pipes with different lengths, mixed gas is conveyed into the combustion head in a segmented mode and then discharged through the air holes in the surface of the combustion head for combustion, the mixed gas can be evenly conveyed to all parts of the combustion head through segmented conveying, and flames on the surface of the combustion head are evenly combusted.

Description

Technical Field

[0001] This invention relates to the field of premixed burner technology, and more particularly to a premixed burner for a boiler. Background Technology

[0002] A premixed burner is an atomizer used in atomic absorption spectrometry analysis. It consists of an atomizer, a premixing chamber (mist chamber), and a burner head. The sample, fuel gas, and oxidizing agent are mixed in the premixing chamber before being delivered to the burner head for combustion, producing a laminar flame; hence, it is also called a laminar flow burner. It features a stable flame, low noise, and minimal background noise, making it a widely used atomizer.

[0003] During long-term operation of the burner, the flame holes on the surface of the burner head are easily blocked by dust particles and carbon deposits produced by incomplete combustion. This can lead to uneven airflow, reduced combustion efficiency, and a significant increase in the risk of backfire caused by excessively low local flow velocity, affecting safety. Therefore, it is necessary to regularly remove the premixed burner from the boiler for manual cleaning. The cleaning process is cumbersome and affects the use of the boiler.

[0004] Therefore, this application proposes a premixed burner that allows the burner head to be cleaned without disassembling the burner. Summary of the Invention

[0005] The purpose of this invention is to solve the problems in the prior art by proposing a premixed burner for a boiler.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A premixed burner for a boiler includes a burner head fixed to the end of a premixing device. The burner head is equipped with a conveying assembly for segmenting and conveying mixed gas into the burner head. The conveying assembly includes multiple conveying pipes fixed to the surface of a turbofan. The multiple conveying pipes are divided into multiple groups, and each group of conveying pipes has a different length, for segmenting and conveying the mixed gas into the burner head. The surface of the burner head is equipped with a cleaning assembly for cleaning carbon deposits and dust particles.

[0007] In some embodiments, two baffles are fixed to the surface of the plurality of delivery pipes, and the two baffles are respectively located at the ends of two sets of delivery pipes away from the turbofan, the turbofan being located at the end of the combustion head near the premixing device and rotating inside the combustion head.

[0008] In some embodiments, the cleaning assembly includes a movable ring that slides on the surface of the burner head and a plurality of high-pressure nozzles disposed inside the movable ring. The high-pressure nozzles are used to spray high-pressure airflow to clean carbon deposits, and the high-pressure nozzles are fixed to the inner wall of the rotating ring.

[0009] In some embodiments, the movable ring has two air inlets fixed to the side facing the premixing device for inflating the cavity between the rotating ring and the movable ring. The outer surface of the rotating ring is fixed with a plurality of inclined plates, and the air inlets are obliquely fixed to the side of the movable ring for blowing the inclined plates and rotating the rotating ring.

[0010] In some embodiments, sealing components for sealing the gap between the moving ring and the combustion head are respectively provided on both sides of the inner wall of the moving ring. The sealing components include a rubber sealing ring and retaining rings fixed on both sides of the inner wall of the moving ring.

[0011] In some embodiments, the sealing ring is a hollow structure, and the sealing ring is connected to the cavity between the moving ring and the rotating ring through two connecting pipes. The retaining ring is located on the outer ring surface of the sealing ring, and a pressure plate is fixed on the side of the sealing ring away from the moving ring.

[0012] In some embodiments, the bottom of the moving ring is provided with a discharge assembly for cleaning dust particles and carbon deposits inside the moving ring. The discharge assembly includes a discharge trough and a dispensing block for dispensing dust particles and carbon deposits into the discharge trough.

[0013] In some embodiments, the dispensing block is triangular and fixed to the inner wall of the rotating ring, with the acute angle end of the dispensing block facing the rotation direction of the rotating ring, and the top of the dispensing block is provided with an inclined groove to transport dust from the dispensing block to the discharge trough.

[0014] In some embodiments, the end of the burner head is provided with a channel for discharging dust particles from inside the burner head, and the end of the burner head is rotatably equipped with a sealing component to close the channel.

[0015] In some embodiments, the closure assembly includes a sealing plate rotatably mounted on the end of the burner head and a second opening and closing assembly for driving the sealing plate to rotate. The second opening and closing assembly includes a slide bar that slides vertically on the end of the burner head and a traction rope for pulling the sealing plate to rotate.

[0016] Compared with the prior art, the present invention provides a premixed burner for a boiler, which has the following beneficial effects.

[0017] 1. The present invention, by setting up a conveying component, delivers the mixed gas in segments to the burner head under the action of multiple sets of conveying pipes of different lengths, and then discharges it through the air holes on the surface of the burner head for combustion. Through segmented conveying, the mixed gas can be evenly delivered to all parts of the burner head, so that the flame on the surface of the burner head burns evenly.

[0018] 2. In this invention, a cleaning component is provided, which causes a high-pressure air source to rotate via an inclined plate, thereby rotating multiple high-pressure nozzles. This cleans dust particles and carbon deposits on the surface of the burner head. Simultaneously, as the gas accumulates in the cavity between the burner head and the rotating ring, it enters the burner head through the pores on its surface. Under the scouring of the high-speed airflow, the dust particles and carbon deposits on the inner wall of the pores are cleaned, preventing pore blockage.

[0019] Other advantages, objectives and features of the invention will be set forth in part in the description which follows; and in part will be apparent to those skilled in the art upon examination of the following description; or may be learned from practice of the invention. Attached Figure Description

[0020] Figure 1 This is a front view structural diagram of the present invention.

[0021] Figure 2 This is a schematic diagram of the cross-sectional structure of the combustion head in this invention.

[0022] Figure 3 This is a schematic diagram of the conveying component in this invention.

[0023] Figure 4 This is a schematic diagram of the rear view structure of the present invention.

[0024] Figure 5 This is a schematic diagram of the first cross-sectional structure of the cleaning component in this invention.

[0025] Figure 6 This is an exploded structural diagram of the cleaning component in this invention.

[0026] Figure 7 This is a cross-sectional structural diagram of the protective shell in this invention.

[0027] Figure 8 This is a schematic diagram of the second cross-sectional structure of the cleaning component in this invention.

[0028] Figure 9 This is a schematic diagram showing the state of the cleaning component being housed inside the protective casing in this invention.

[0029] Figure 10 This is a schematic diagram of the emission component in this invention.

[0030] Figure 11 This is a schematic diagram illustrating the usage state of the delivery block in this invention.

[0031] Figure 12 This is a schematic diagram of the opening / closing component and the closing component in this invention.

[0032] Figure 13This is a schematic diagram of the structure of the enclosed component in this invention.

[0033] Figure 14 This is a schematic diagram showing the sealed plate in the open state in this invention.

[0034] In the picture: 1. Combustion head; 101. Premixing device; 2. Conveying assembly; 201. Turbine fan; 202. Conveying pipe; 203. Baffle; 3. Cleaning assembly; 301. Moving ring; 302. High-pressure nozzle; 303. Rotating ring; 304. Isolation ring; 305. Air inlet head; 3051. Winding wheel; 3052. Solenoid valve; 306. Rigid chain push-pull device; 4. Protective shell; 5. Inclined plate; 6. Sealing assembly; 601. Sealing ring; 602. Retaining ring; 6 03. Connecting pipe; 604. Pressure plate; 7. Discharge assembly; 701. Discharge trough; 702. Dispensing block; 7021. Inclined trough; 703. Sealing plate; 704. First opening and closing assembly; 7041. Rocker arm; 7042. Slide chute; 7043. Top rod; 7044. Top block; 8. Sealing assembly; 801. Sealing plate; 802. Second opening and closing assembly; 8021. Slide rod; 8022. Traction rope; 8023. Push rod; 9. Aerogel insulation board. Detailed Implementation

[0035] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0036] Reference Figure 1-14 A premixed burner for a boiler includes a burner head 1 fixed to the end of a premixing device 101. Inside the burner head 1 is a conveying assembly 2 that delivers a mixed gas in segments to the burner head 1. The conveying assembly 2 includes multiple conveying pipes 202 fixed to the surface of a turbofan 201. The multiple conveying pipes 202 are divided into multiple groups, each group having a different length, for delivering the mixed gas in segments to the burner head 1. Each group has the same number of conveying pipes 202. Two baffles 203 are fixed to the surface of the multiple conveying pipes 202. The two baffles 203 are located at the ends of two groups of conveying pipes 202 away from the turbofan 201. A gap is provided between the baffles 203 and the inner wall of the burner head 1. The turbofan 201 is located at the end of the burner head 1 closest to the premixing device 101 and rotates inside the burner head 1.

[0037] Understandably, by setting up the conveying component 2, the mixed gas is conveyed to the burner head 1 in segments under the action of multiple sets of conveying pipes 202 of different lengths, and then discharged through the pores on the surface of the burner head 1 for combustion. Through segmented conveying, the mixed gas can be evenly delivered to each part of the burner head 1, so that the flame on the surface of the burner head 1 burns evenly, avoiding the discharge volume of the burner head 1 closer to the premixing device 101 being greater than that of the burner head 1 farther away from the premixing device 101, which would lead to uneven distribution of the combustion flame. By setting up the baffle 203, most of the mixed gas can be isolated in the segmented part, preventing the mixed gas from flowing into the next stage burner head 1 in large quantities under pressure. By setting up the turbo fan 201, before the mixed gas enters the conveying pipe 202, the turbo fan 201 and the conveying pipe 202 can be driven to rotate. The turbo fan 201 disturbs the mixed gas, further mixing the air and fuel gas.

[0038] Specifically, the surface of the burner head 1 is provided with a cleaning component 3 for cleaning carbon deposits and dust particles. The cleaning component 3 includes a moving ring 301 that slides on the surface of the burner head 1 and multiple high-pressure nozzles 302 disposed inside the moving ring 301. The high-pressure nozzles 302 are used to spray high-pressure airflow to clean carbon deposits. The high-pressure nozzles 302 are fixed to the inner wall of the rotating ring 303. Isolation rings 304 are fixed on both sides of the inner wall of the moving ring 301. The rotating ring 303 rotates on the surface of the two isolation rings 304. The high-pressure nozzles 302 are located between the two isolation rings 304. The high-pressure nozzles 302 are connected to the cavity between the rotating ring 303 and the moving ring 301. Two air inlets 305 are fixed on the side of the moving ring 301 facing the premixing device 101 for filling the cavity between the rotating ring 303 and the moving ring 301 with air. The outlet end of the high-pressure nozzles 302 has a flat structure. A protective shell 4 is fixed to one end of the burner head 1 facing the premixing device 101. Rigid chain push-pull devices 306 for driving the moving ring 301 to slide on the surface of the burner head 1 are fixed on both sides inside the protective shell 4. The chain of the rigid chain push-pull device 306 is fixed to the surface of the moving ring 301. The rigid chain push-pull device 306 is existing technology, so it will not be described in detail.

[0039] Understandably, during long-term operation, the burner head 1 is easily clogged by dust particles and carbon deposits from incomplete combustion, leading to uneven airflow and reduced combustion efficiency. Manual cleaning requires removing the premixed burner from the boiler, and due to the long cleaning cycle, the dust particles and carbon deposits become increasingly stubborn and difficult to clean. Therefore, by setting up the cleaning component 3 to automatically clean the burner head 1, the cleaning frequency can be increased, maintaining the cleanliness of the burner head 1 surface and pores, preserving combustion efficiency, and extending the maintenance cycle of the premixed burner. When using the cleaning component 3 to clean the burner head 1, the rigid chain push-pull device 306 drives the moving ring 301. The device moves across the surface of the burner head 1. The solenoid valve 3052 opens, allowing high-pressure air to be delivered to the moving ring 301 via a hose and inlet head 305. The airflow is then sprayed onto the surface of the burner head 1 through the high-pressure nozzle 302. The flat outlet end increases the cleaning width while simultaneously increasing the jet pressure. The rotating ring 303 drives multiple high-pressure nozzles 302 to rotate, thereby cleaning dust particles and carbon deposits from the surface of the burner head 1. Simultaneously, as air accumulates in the cavity between the burner head 1 and the rotating ring 303, it enters the burner head 1 through pores on its surface. Under the scouring effect of the high-speed airflow, dust particles and carbon deposits on the inner walls of the pores are cleaned, preventing pore blockage.

[0040] Specifically, a winding wheel 3051 rotates at the top inside the protective shell 4. The winding wheel 3051 rotates at the top inside the protective shell 4 via a hollow shaft. A solenoid valve 3052 is fixed at the end of the hollow shaft via a rotary sealing joint. The solenoid valve 3052 is fixed at the top of the protective shell 4. A high-pressure air source is connected to the input end of the solenoid valve 3052. The surface of the hollow shaft is connected to the air inlet head 305 via a hose. A spiral spring is provided at the end of the winding wheel 3051 to drive the winding wheel 3051 to wind the hose.

[0041] Understandably, by setting the winding wheel 3051, the spiral spring drives the winding wheel 3051 to rotate, thereby winding and storing the hose. By setting the protective shell 4, the cleaning component 3 is stored in the protective shell 4 when the burner head 1 is used daily. The protective shell 4 stores and protects the cleaning component 3, preventing damage to the cleaning component 3 caused by high temperature.

[0042] Specifically, multiple inclined plates 5 are fixed on the outer surface of the rotating ring 303. The multiple inclined plates 5 are arranged in a circular array on the surface of the rotating ring 303 and are arranged in parallel. The air intake head 305 is fixed obliquely on the side of the moving ring 301 and is arranged opposite to the inclined plates 5.

[0043] It is understandable that by setting multiple inclined plates 5, when the high-pressure airflow enters the moving ring 301 through the air inlet 305, the high-pressure airflow blows the inclined plates 5, and under the action of the airflow, the inclined plates 5 drive the rotating ring 303 to rotate.

[0044] Specifically, sealing components 6 are respectively provided on both sides of the inner wall of the moving ring 301 to seal the gap between the moving ring 301 and the burner head 1. The sealing components 6 include a rubber sealing ring 601 and a retaining ring 602 fixed on both sides of the inner wall of the moving ring 301. The sealing ring 601 has a hollow structure and is connected to the cavity between the moving ring 301 and the rotating ring 303 through two connecting pipes 603. The retaining ring 602 is located on the outer ring surface of the sealing ring 601, and a pressure plate 604 is fixed on the side of the sealing ring 601 away from the moving ring 301.

[0045] Understandably, to prevent high-pressure gas leakage from the cavity between the rotating ring 303 and the burner head 1, which would affect the cleaning effect on the pores, a sealing assembly 6 is provided. When the cavity between the moving ring 301 and the rotating ring 303 is filled with gas, the gas enters the sealing ring 601 through the connecting pipe 603, causing the sealing ring 601 to expand. Under the action of the retaining ring 602, the expansion direction of the sealing ring 601 is restricted, ensuring that the expansion direction of the sealing ring 601 faces the burner head 1, thus sealing the gap between the moving ring 301 and the burner head 1. Simultaneously, by providing a pressure plate 604, when the cavity between the rotating ring 303 and the burner head 1 is filled with high-pressure gas, the gas pressure exerts pressure on the pressure plate 604. The sealing ring 601 is compressed, forming a U-shaped cavity through the moving ring 301, the retaining ring 602, and the pressure plate 604, so that the expansion direction of the sealing ring 601 is completely facing the burner head 1, improving the sealing effect. At the same time, the greater the pressure in the cavity between the rotating ring 303 and the burner head 1, the greater the pressure on the pressure plate 604, thereby compressing the sealing ring 601 and increasing the pressure of the sealing ring 601 when it is pressed against the burner head 1, thus improving the sealing effect. When the moving ring 301 needs to move, the solenoid valve 3052 shuts off the input of the high-pressure gas source. At this time, the gas in the sealing ring 601 is gradually discharged, reducing the pressure of the sealing ring 601 against the surface of the burner head 1, making it easier for the moving ring 301 to move on the surface of the burner head 1.

[0046] Specifically, a discharge assembly 7 is provided at the bottom of the moving ring 301 for cleaning dust particles and carbon deposits inside the moving ring 301. The discharge assembly 7 includes a discharge trough 701 and a dispensing block 702 for dispensing dust particles and carbon deposits into the discharge trough 701. The discharge trough 701 is located at the bottom of one of the isolation rings 304. An opening for discharging dust particles from the moving ring 301 is provided on the side of the discharge trough 701 away from the premixing device 101. A receiving port for receiving dust particles is provided at the top of the discharge trough 701. An inclined surface is provided inside the discharge trough 701 to facilitate the discharge of dust particles from the opening. The dispensing block 702 is triangular and fixed to the inner wall of the rotating ring 303. The acute angle end of the dispensing block 702 faces the rotation direction of the rotating ring 303. The top of the dispensing block 702 is provided with an inclined groove 7021 for conveying dust from the dispensing block 702 to the discharge trough 701. The side of the moving ring 301 is provided with a sealing plate 703 for sealing the opening of the discharge trough 701.

[0047] Understandably, since the moving ring 301 is a closed structure, some dust particles will remain in the cavity between the rotating ring 303 and the burner head 1 when cleaning dust particles and carbon deposits, and need to be discharged in time. Therefore, by setting the discharge component 7, during the rotation of the rotating ring 303, the dispensing block 702 is rotated to the bottom, and the dust particles are collected on the surface of the dispensing block 702 through the triangular dispensing block 702. As the rotation continues, when the inclined groove 7021 corresponds to the discharge groove 701, the inclined groove 7021 is at the lowest point of the dispensing block 702, and the dust particles collected on the surface of the dispensing block 702 slide down into the discharge groove 701 through the inclined groove 7021. The dispensing block 702 can collect dust particles once for each rotation of the rotating ring 303, so that the dust particles are temporarily stored in the discharge groove 701.

[0048] Specifically, the sealing plate 703 slides vertically on the side of the moving ring 301. The side of the moving ring 301 is provided with a first opening and closing component 704 for opening the sealing plate 703. The first opening and closing component 704 includes a rocker arm 7041 that rotates on the side of the moving ring 301. A groove 7042 is provided laterally on the surface of the sealing plate 703. The upper end of the rocker arm 7041 slides inside the groove 7042. A top rod 7043 is fixed to the other end of the rocker arm 7041. A top block 7044 that cooperates with the top rod 7043 is fixed to the bottom of the end of the burner head 1 away from the premixing device 101. A first spring that pushes the sealing plate 703 to slide upward is fixed to the bottom of the sealing plate 703.

[0049] Understandably, after the burner head 1 is cleaned, the moving ring 301 is located at the end of the burner head 1. At this time, the push rod 7043 abuts against the surface of the top block 7044. The top block 7044 drives the push rod 7043 and the rocker arm 7041 to rotate, thereby causing the rocker arm 7041 to drive the sealing plate 703 to slide downward, thereby opening the discharge groove 701 and allowing the dust particles in the discharge groove 701 to be automatically discharged.

[0050] Specifically, the end of the burner head 1 is provided with a channel for discharging dust particles inside the burner head 1. The channel is semi-circular, and the end of the burner head 1 is provided with a sealing component 8 to seal the channel. The sealing assembly 8 includes a sealing plate 801 that rotates at the end of the burner head 1 and a second opening and closing assembly 802 for driving the sealing plate 801 to rotate. The second opening and closing assembly 802 includes a slide rod 8021 that slides vertically at the end of the burner head 1 and a traction rope 8022 fixed to the lower end of the slide rod 8021. The lower end of the traction rope 8022 is fixed to the surface of the sealing plate 801. A second spring for pushing the slide rod 8021 to slide downward is fixed to the surface of the slide rod 8021. A push rod 8023 is hinged to the upper end of the slide rod 8021. The lower end of the push rod 8023 abuts against the surface of the burner head 1. A step block is provided at the lower end of the slide rod 8021. The slide rod 8021 abuts against the end face of the burner head 1 through the step block.

[0051] Understandably, after the burner head 1 is cleaned, the moving ring 301 is located at the end of the burner head 1. The moving ring 301 pushes the push rod 8023 to move vertically. During the movement of the push rod 8023, it drives the slide rod 8021 to slide upward, thereby causing the traction rope 8022 to drive the sealing plate 801 to rotate, thus opening the end of the burner head 1. At the same time, the premixing device 101 blows out only air, and through multiple conveying pipes 202, it blows out the dust particles inside the burner head 1 from the end of the burner head 1, preventing dust particles from accumulating inside the burner head 1 and being carried into the air holes by the mixed gas during daily combustion, causing the air holes to become blocked again. At the same time, when the premixing device 101 blows out air, it... The turbofan 201 drives the delivery pipe 202 to rotate, causing dust particles on the surface of the delivery pipe 202 to fall to the bottom of the burner head 1 and be blown out of the burner head 1 by the air. This prevents dust particles that fall onto the delivery pipe 202 from remaining inside the burner head 1 during the cleaning process. It also prevents dust particles from remaining at the junction of the delivery pipe 202 and the baffle 203. When the second spring drives the slide rod 8021 to slide downward, the sealing plate 801 seals the end of the burner head 1. At this time, the slide rod 8021 abuts against the surface of the sealing plate 801 through the step block, limiting the sealing plate 801 and preventing the sealing plate 801 from opening under the high pressure of the mixed gas, thus preventing the mixed gas from leaking from the end of the burner head 1.

[0052] Specifically, an aerogel insulation plate 9 is fixed on the side of the moving ring 301 away from the premixing device 101, and the top rod 7043 is set through the aerogel insulation plate 9.

[0053] It is understandable that by setting up the aerogel heat insulation plate 9, when the cleaning component 3 is housed in the protective shell 4, the aerogel heat insulation plate 9 is placed against the entrance of the protective shell 4 to prevent the heat generated by the burner head 1 during operation from being transferred to the inside of the protective shell 4 and causing damage to the cleaning component 3.

[0054] In this invention, when the burner head 1 is working, air and fuel gas are mixed by the premixing device 101, and the mixed gas is transported in stages to the burner head 1 through the turbo fan 201 and multiple delivery pipes 202. The mixture is then discharged through the vents on the surface of the burner head 1 for combustion. This segmented delivery ensures that the mixed gas is evenly distributed to all parts of the burner head 1, resulting in uniform flame combustion on the surface of the burner head 1. When cleaning of the burner head 1 is required, the rigid chain push-pull device 306 moves the moving ring 301 out of the protective shell 4 and pushes it to the surface of the burner head 1. The movement then stops, and the solenoid valve 3052 opens, allowing high-pressure gas to pass through the hose and the air inlet 305. The gas is delivered into the moving ring 301, and then sprayed onto the surface of the burner head 1 through the high-pressure nozzle 302. Under the action of the inclined plate 5, the rotating ring 303 drives multiple high-pressure nozzles 302 to rotate, thereby cleaning dust particles and carbon deposits on the surface of the burner head 1. When the cavity between the moving ring 301 and the rotating ring 303 is filled with gas, the gas enters the sealing ring 601 through the connecting pipe 603, causing the sealing ring 601 to expand. Under the action of the retaining ring 602 and the pressure plate 604, the expansion direction of the sealing ring 601 is restricted, so that the expansion direction of the sealing ring 601 is towards the burner head 1, sealing the gap between the moving ring 301 and the burner head 1. To prevent high-pressure gas leakage from the cavity between the rotating ring 303 and the burner head 1; as gas accumulates in the cavity between the burner head 1 and the rotating ring 303, the gas enters the burner head 1 through the vents on its surface. Under the scouring of the high-speed airflow, dust particles and carbon deposits on the inner wall of the vents are cleaned, preventing vent blockage. Some of the cleaned dust particles remain in the moving ring 301, while the rest enter the burner head 1 through the vents; after cleaning the burner head 1 for a period, the moving ring 301 moves again, allowing the cleaning component 3 to clean the burner head 1 in segments; during the rotation of the rotating ring 303, the dispensing block 702 rotates to the bottom, causing the triangular... The feeding block 702 collects dust particles onto its surface and rotates continuously. When the inclined chute 7021 corresponds to the discharge chute 701, the inclined chute 7021 is at the lowest point of the feeding block 702. The dust particles collected on the surface of the feeding block 702 slide down through the inclined chute 7021 into the discharge chute 701, where they are temporarily stored. When the cleaning component 3 moves to the end of the burner head 1, the push rod 7043 abuts against the surface of the top block 7044, causing the push rod 7043 and the rocker arm 7041 to rotate. This causes the rocker arm 7041 to drive the sealing plate 703 to slide downward, opening the discharge chute 701 and allowing the dust particles in the discharge chute 701 to be automatically discharged.Simultaneously, the moving ring 301 pushes the push rod 8023 to move vertically. During the movement of the push rod 8023, it causes the sliding rod 8021 to slide upwards, which in turn drives the sealing plate 801 to rotate via the traction rope 8022, opening the end of the burner head 1. At the same time, the premixing device 101 blows out only air, which is then blown out of the burner head 1 from its end through multiple delivery pipes 202. After the cleaning process is completed, the cleaning assembly 3 is moved into the protective shell 4 for storage.

[0055] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

[0056] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0057] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A premixed burner for a boiler, comprising a burner head (1) fixed to the end of a premixing device (101), characterized in that, The burner head (1) is provided with a conveying assembly (2) for conveying the mixed gas into the burner head (1) in segments. The conveying assembly (2) includes multiple conveying pipes (202) fixed on the surface of the turbofan (201). The multiple conveying pipes (202) are divided into multiple groups, and the length of each group of conveying pipes (202) is different. They are used to convey the mixed gas into the burner head (1) in segments. The surface of the burner head (1) is provided with a cleaning assembly (3) for cleaning carbon deposits and dust particles.

2. The premixed burner for a boiler according to claim 1, characterized in that, Two baffles (203) are fixed on the surface of the multiple delivery pipes (202). The two baffles (203) are respectively located at the ends of the two sets of delivery pipes (202) away from the turbofan (201). The turbofan (201) is located at the end of the combustion head (1) close to the premixing device (101) and the turbofan (201) rotates inside the combustion head (1).

3. The premixed burner for a boiler according to claim 1, characterized in that, The cleaning assembly (3) includes a movable ring (301) that slides on the surface of the burner head (1) and a plurality of high-pressure nozzles (302) disposed inside the movable ring (301). The high-pressure nozzles (302) are used to spray high-pressure airflow to clean carbon deposits. The high-pressure nozzles (302) are fixed to the inner wall of the rotating ring (303).

4. A premixed burner for a boiler according to claim 3, characterized in that, Two air inlets (305) are fixed on the side of the moving ring (301) facing the premixing device (101) for inflating the cavity between the rotating ring (303) and the moving ring (301). Multiple inclined plates (5) are fixed on the outer surface of the rotating ring (303). The air inlets (305) are obliquely fixed on the side of the moving ring (301) for blowing the inclined plates (5) and the rotating ring (303) to rotate.

5. A premixed burner for a boiler according to claim 3, characterized in that, The inner walls of the moving ring (301) are respectively provided with sealing components (6) for sealing the gap between the moving ring (301) and the burner head (1). The sealing components (6) include a rubber sealing ring (601) and a retaining ring (602) fixed on both sides of the inner walls of the moving ring (301).

6. A premixed burner for a boiler according to claim 5, characterized in that, The sealing ring (601) is a hollow structure. The sealing ring (601) is connected to the cavity between the moving ring (301) and the rotating ring (303) through two connecting pipes (603). The retaining ring (602) is located on the outer ring surface of the sealing ring (601). A pressure plate (604) is fixed on the side of the sealing ring (601) away from the moving ring (301).

7. A premixed burner for a boiler according to claim 3, characterized in that, The bottom of the moving ring (301) is provided with a discharge component (7) for cleaning dust particles and carbon deposits inside the moving ring (301). The discharge component (7) includes a discharge tank (701) and a dispensing block (702) for dispensing dust particles and carbon deposits into the discharge tank (701).

8. A premixed burner for a boiler according to claim 7, characterized in that, The delivery block (702) is triangular and fixed to the inner wall of the rotating ring (303). The acute angle end of the delivery block (702) faces the rotation direction of the rotating ring (303). The top of the delivery block (702) is provided with an inclined groove (7021) that transports dust from the delivery block (702) to the discharge trough (701).

9. A premixed burner for a boiler according to claim 1, characterized in that, The end of the burner head (1) is provided with a through groove for discharging dust particles inside the burner head (1), and the end of the burner head (1) is rotatably provided with a sealing component (8) to seal the through groove.

10. A premixed burner for a boiler according to claim 9, characterized in that, The closing assembly (8) includes a sealing plate (801) that rotates at the end of the burner head (1) and a second opening and closing assembly (802) for driving the sealing plate (801) to rotate. The second opening and closing assembly (802) includes a slide bar (8021) that slides vertically at the end of the burner head (1) and a traction rope (8022) for pulling the sealing plate (801) to rotate.

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