A high turndown ratio liquid fuel burner

Abstract

The utility model discloses a kind of high adjustment ratio liquid fuel burners, including shell assembly, ignition system, fuel supply system, combustion air system, control system;The front end of shell assembly is fixedly installed panel assembly, integrated observation hole and multiple fuel interfaces are on panel assembly, and thruster mechanism is installed on panel assembly, and combustion stabilizer is arranged in the center position of panel assembly;Ignition system includes flame monitor and high-energy ignition gun;Fuel supply system includes at least one main liquid fuel supply pipeline and one ignition liquid fuel supply pipeline, and main liquid fuel supply pipeline is provided with ignition liquid spray gun and main liquid spray gun;Combustion air system includes air duct formed by shell assembly and mounting flange arranged in air duct.The utility model can realize high adjustment ratio and wide load operation;With multi-fuel adaptability;High integration and reliability;High degree of automation, operation is safer and more convenient;Strong durability.

Description

Technical Field

[0001] This utility model belongs to the field of industrial combustion equipment technology, and in particular relates to a liquid fuel burner with a high adjustment ratio. Background Technology

[0002] In industries such as chemical, petrochemical, and environmental protection, there is often a need to treat various high-concentration waste liquids. Using burners and other related equipment to render these waste liquids harmless is an effective treatment method.

[0003] A search revealed a liquid fuel burner with publication number CN221705496U on the Chinese Patent website. This burner improves flame quality and combustion quality by incorporating a filter assembly and a heating assembly. The filter cartridge in the filter assembly is detachable, making filter replacement convenient. However, it has some drawbacks and shortcomings that need improvement: (1) Existing burners generally suffer from low adjustment ratios, narrow operating load ranges, difficulty in ignition, unstable combustion, and inflexible switching between different fuels. Especially when dealing with waste liquids with large flow fluctuations, conventional burners struggle to maintain stable combustion under low loads, leading to flameout or excessive pollutant emissions; (2) Many applications require burners to simultaneously or alternately use multiple fuels such as waste liquids and natural gas, and to precisely adjust the ratio of these fuels. Existing burners often have complex structures, with each system being independent and dispersed, resulting in low integration, inconvenient on-site installation and debugging, and high maintenance costs. Therefore, this utility model provides a high-adjustment-ratio liquid fuel burner to address these issues. Utility Model Content

[0004] This invention provides a high-regulation-ratio liquid fuel burner. Through optimized structural design (such as a flame stabilizing hood and a multi-waste liquid nozzle layout) and integrated control strategy, it achieves a higher regulation ratio compared to existing technologies. This allows the burner to burn efficiently and stably over a wider load range, adapting to significant fluctuations in waste liquid flow. It can burn one or more liquid fuels individually or simultaneously, exhibiting strong fuel adaptability and effectively meeting the needs of complex industrial scenarios. Furthermore, the control system can precisely proportion different fuels to achieve optimal combustion. By completing the assembly and commissioning of the ignition system and flame monitoring system in-plant, the workload and time for on-site installation and commissioning are greatly reduced, improving the reliability and consistency of the entire unit and avoiding on-site installation errors. The integrated flame monitoring and automatic ignition program, combined with the control system, enables fully automatic and safe operation, including automatic ignition, flameout protection, and fault alarms, significantly reducing operator risks and labor intensity. Key components in contact with fuel and high-temperature flue gas (such as the spray gun, combustion cylinder, and flame stabilizing hood) are made of high-temperature corrosion-resistant materials, and the main structure employs a strict anti-corrosion coating process, significantly improving the service life of the equipment under harsh operating conditions. In summary, this invention solves the problems in the background technology.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] This utility model discloses a high-adjustment-ratio liquid fuel burner, comprising a shell assembly, an ignition system, a fuel supply system, a combustion air system, and a control system;

[0007] A panel assembly is fixedly installed at the front end of the housing assembly. The panel assembly integrates a fire observation hole and multiple fuel interfaces, and a thruster mechanism is installed on the panel assembly. A flame stabilizing hood is provided at the center of the panel assembly, and the flame stabilizing hood is located at the outlet center of the burner.

[0008] The ignition system includes a flame detector and a high-energy ignition gun, which is retractably mounted on the panel assembly via a thruster mechanism.

[0009] The fuel supply system includes at least one main liquid fuel supply line and one ignition liquid fuel supply line, which are respectively connected to the fuel interface on the panel assembly. The main liquid fuel supply line is equipped with an ignition liquid spray gun and a main liquid spray gun.

[0010] The combustion air system includes an air duct composed of a shell assembly and a mounting flange disposed in the air duct.

[0011] The control system is electrically connected to the actuators of the ignition system, the fuel supply system, and the combustion air system.

[0012] Furthermore, the ignition liquid spray gun is located at the center of the burner, and there are at least two main liquid spray guns, which are evenly distributed on the panel assembly with the central axis of the burner as the center and are evenly distributed at the burner head. The high-energy ignition gun is located between two adjacent main liquid spray guns.

[0013] Furthermore, the main liquid spray gun adopts a media atomization structure.

[0014] Furthermore, the housing assembly and panel assembly are carbon steel structures, and their surfaces are coated with an anti-corrosion coating, which includes iron oxide alkyd primer and silver-gray topcoat.

[0015] Furthermore, the housing assembly is formed by welding and bolting together the air duct, air inlet duct, and cone.

[0016] Furthermore, the panel assembly is fastened to the front end of the housing assembly by bolts, and its mating surface is provided with a high-temperature resistant asbestos-free gasket.

[0017] The present invention has the following advantages over the prior art:

[0018] (1) It can achieve a high regulation ratio and wide load operation: Through optimized structural design (such as stable combustion hood, multi-waste liquid gun layout) and integrated control strategy, it can achieve a higher regulation ratio compared with the existing technology, so that the burner can burn efficiently and stably over a wider load range to adapt to large fluctuations in waste liquid flow.

[0019] (2) It has multi-fuel adaptability: it can burn one or more liquid fuels alone or at the same time, and has strong fuel adaptability, thus effectively meeting the needs of complex industrial scenarios. Furthermore, it can accurately mix different fuels through the control system to achieve optimal combustion.

[0020] (3) High integration and reliability: By completing the assembly and debugging of the ignition system and flame monitoring system in the factory, the workload and time of on-site installation and debugging are greatly reduced, the reliability and consistency of the whole machine are improved, and on-site installation errors are avoided;

[0021] (4) High degree of automation, safer and more convenient operation: The integrated flame monitoring and automatic ignition program, together with the control system, can realize fully automatic safe operation such as automatic ignition, flameout protection, and fault alarm, which greatly reduces the risk and labor intensity of operators;

[0022] (5) High durability: Key components that come into contact with fuel and high-temperature flue gas (such as spray guns, combustion tubes, and combustion stabilizing hoods) are made of high-temperature corrosion resistant materials, and the main structure adopts a strict anti-corrosion coating process, which significantly improves the service life of the equipment under harsh working conditions.

[0023] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a three-dimensional structural diagram of a high-adjustment-ratio liquid fuel burner according to the present invention.

[0026] The attached diagram lists the components represented by each number as follows:

[0027] 1. Housing assembly; 2. Panel assembly; 3. Flame detector; 4. Thruster mechanism; 5. High-energy ignition gun; 6. Ignition liquid spray gun; 7. Main liquid spray gun; 8. Observation hole; 9. Mounting flange; 10. Flame stabilizing cover. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0029] In the description of this utility model, it should be understood that the terms "relative", "one end", "inner", "lateral", "end", "both ends", "both sides", "front", "one end face", "the other end face", etc., which indicate orientation or positional relationship, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0030] Please see Figure 1 As shown, this utility model discloses a high-adjustment-ratio liquid fuel burner, which includes a housing assembly 1, an ignition system, a fuel supply system, a combustion air system, and a control system.

[0031] A panel assembly 2 is fixedly installed at the front end of the housing assembly 1. The panel assembly 2 integrates a viewing hole 8 and multiple fuel interfaces, and a thruster mechanism 4 is installed on the panel assembly 2. A flame stabilizing hood 10 is set at the center of the panel assembly 2. The flame stabilizing hood 10 is located at the center of the burner outlet and is used to form a recirculation zone at the burner outlet in order to stabilize the flame.

[0032] The ignition system includes a flame detector 3 and a high-energy ignition gun 5. The high-energy ignition gun 5 is telescopically mounted on the panel assembly 2 via a pusher mechanism 4. The flame detector 3 is one of an ultraviolet flame detector, an infrared flame detector, or an integrated infrared and ultraviolet flame detector. The number of flame detectors can be one, two, or three. The flame detector 3 can detect flame signals and feed them back to the control system when a signal is detected. The pusher mechanism 4 can push and pull the high-energy ignition gun 5. The high-energy ignition gun 5 is pushed forward during ignition and pulled out when ignition is complete, which helps to improve the lifespan of the high-energy ignition gun 5.

[0033] The fuel supply system includes at least one main liquid fuel supply line and one ignition liquid fuel supply line, which are respectively connected to the fuel interface on the panel assembly 2. The main liquid fuel supply line is equipped with an ignition liquid spray gun 6 and a main liquid spray gun 7. The liquid fuel supply pressure is 0.6-1.5MPa, and the burner adjustment ratio can reach 1:15.

[0034] The combustion air system includes an air duct consisting of a housing assembly 1 and a mounting flange 9 disposed in the air duct;

[0035] The control system is electrically connected to the actuators of the ignition system, fuel supply system, and combustion air system to control the automatic operation of the burner. When the control system receives the flame detection signal, it can control the automatic ignition, combustion adjustment, and safety interlock of the burner. The flame detector 3 and the propeller mechanism 4 have been integrated and installed on the housing assembly 1 and the panel assembly 2 before leaving the factory, and have been connected and debugged with the control system to form an integrated structure.

[0036] Among them, the ignition liquid spray gun 6 is located in the center of the burner, and there are at least two main liquid spray guns 7, which are evenly distributed on the panel assembly 2 with the central axis of the burner as the center and are evenly distributed at the burner head. The high-energy ignition gun 5 is located between two adjacent main liquid spray guns 7, which can effectively enhance the atomization and mixing effect of waste liquid.

[0037] Among them, the main liquid spray gun 7 adopts a medium atomization structure, and each main liquid spray gun 7 can work individually or simultaneously.

[0038] Among them, the shell assembly 1 and the panel assembly 2 are carbon steel structures, and their surfaces are coated with anti-corrosion coatings, which include iron oxide alkyd primer and silver-gray topcoat. The process is to spray two coats of iron oxide alkyd primer C06-1 and then spray one coat of silver-gray topcoat B04.

[0039] The shell assembly 1 is composed of a wind duct, an air inlet duct, and a cone connected by welding and bolts, and its rear end is connected to the furnace body or boiler via a mounting flange 9.

[0040] The panel assembly 2 is fastened to the front end of the housing assembly 1 by bolts. The mating surface is provided with a high-temperature resistant asbestos-free gasket to ensure that the housing assembly 1 and the panel assembly 2 are sealed. The panel assembly 2 has multiple interfaces around its perimeter for installing the main liquid spray gun 7.

[0041] All standard parts used in the application documents can be purchased from the market. All components in this application documents can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art.

[0042] The working principle of this utility model is as follows:

[0043] In use, the start command is sent to the control system. The control system first starts the combustion air system and adjusts the damper to the ignition opening. Then, the control thruster mechanism 4 advances the high-energy ignition gun 5 to the working position. Next, the high-energy ignition gun 5 discharges and ignites, the ignition liquid pipeline valve opens, and the ignition liquid spray gun 6 is ignited. After the flame monitor 3 detects the flame signal, it feeds back to the control system. The control system then opens the main liquid pipeline valve according to the program. The main liquid is atomized by the main liquid spray gun 7 and sprayed into the flame hole, where it is ignited by the high-temperature flame. At this time, the ignition liquid spray gun 6 can be used as auxiliary fuel and adjusted according to the set ratio, or it can be completely switched to the main liquid for combustion alone. After the combustion is stable, the high-energy ignition gun 5 is withdrawn, and the flame monitor 3 continuously monitors the flame. The control system adjusts the main liquid supply, ignition liquid supply, and combustion air volume synchronously according to the load demand to ensure that the air-fuel ratio is at its best within the entire adjustment range, thereby achieving efficient, stable, and clean combustion.

[0044] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A high-adjustment-ratio liquid fuel burner, characterized in that, Includes housing assembly (1), ignition system, fuel supply system, combustion air system, and control system; A panel assembly (2) is fixedly installed at the front end of the housing assembly (1). The panel assembly (2) integrates a fire observation hole (8) and multiple fuel interfaces. A thruster mechanism (4) is installed on the panel assembly (2). A flame stabilizing cover (10) is provided at the center of the panel assembly (2). The flame stabilizing cover (10) is located at the outlet center of the burner. The ignition system includes a flame detector (3) and a high-energy ignition gun (5), which is telescopically mounted on the panel assembly (2) via a thruster mechanism (4). The fuel supply system includes at least one main liquid fuel supply line and one ignition liquid fuel supply line, which are respectively connected to the fuel interface on the panel assembly (2). The main liquid fuel supply line is equipped with an ignition liquid spray gun (6) and a main liquid spray gun (7). The combustion air system includes an air duct consisting of a housing assembly (1) and an installation flange (9) disposed in the air duct. The control system is electrically connected to the actuators of the ignition system, the fuel supply system, and the combustion air system.

2. The high-adjustment-ratio liquid fuel burner according to claim 1, characterized in that, The ignition liquid spray gun (6) is located at the center of the burner. There are at least two main liquid spray guns (7), which are evenly distributed on the panel assembly (2) with the central axis of the burner as the center and are evenly distributed at the burner head. The high-energy ignition gun (5) is located between two adjacent main liquid spray guns (7).

3. A high-adjustment-ratio liquid fuel burner according to claim 1, characterized in that, The main liquid spray gun (7) adopts a medium atomization structure.

4. A high-adjustment-ratio liquid fuel burner according to claim 1, characterized in that, The housing assembly (1) and the panel assembly (2) are carbon steel structures, and their surfaces are coated with an anti-corrosion coating, which includes iron oxide alkyd primer and silver-gray topcoat.

5. A high-adjustment-ratio liquid fuel burner according to claim 1, characterized in that, The housing assembly (1) is formed by welding and bolting together a wind duct, an air inlet duct, and a cone.

6. A high-adjustment-ratio liquid fuel burner according to claim 1, characterized in that, The panel assembly (2) is fastened to the front end of the housing assembly (1) by bolts, and its mating surface is provided with a high-temperature resistant asbestos-free gasket.

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