Boiler combustion device

Abstract

The utility model relates to a kind of boiler combustion device, including boiler hearth, air supply mechanism and fuel supply mechanism, air supply mechanism includes buffer tank and fan, by the design of buffer tank makes air get steady voltage and uniform flow before entering hearth, in combination with the accurate ration of fuel supply mechanism, make fuel and air mixing more evenly, combustion is more sufficient, reduce the emission of unburnt fuel and harmful gas, and can avoid sudden shutdown accident, air supply interruption, waste a lot of time to re-ignition, and air is delivered to buffer tank by fan, and is handled by demisting component in tank body, effectively remove moisture and impurities in air, to ensure that the air dry, clean entering boiler hearth, avoid because of humidity or particulate matter influence combustion efficiency, to ensure that boiler long-term stable operation.

Description

Technical Field

[0001] This utility model relates to the field of natural gas equipment technology, and in particular to a boiler combustion device. Background Technology

[0002] In a sulfur-containing natural gas desulfurization station, the power boiler, as the core steam supply equipment, undertakes most of the steam production tasks of the entire station, and the stability of its steam supply is directly related to the smooth operation of the entire station.

[0003] However, the current power boiler fan system has significant safety hazards. In the event of power grid fluctuations, extreme thunderstorms, or operator error, it is prone to sudden fan shutdowns, leading to unplanned boiler shutdowns and a complete interruption of steam supply to the entire station. After boiler shutdown, the re-ignition and heating process is lengthy, during which the steam production capacity of a single boiler cannot meet process requirements, forcing the station to urgently switch the steam energy-saving system to electric drive mode.

[0004] However, this emergency switching operation is complex and can easily cause fluctuations in the production system. In addition, improper operation may lead to secondary accidents such as local overheating and tube rupture of water-cooled walls or forced venting of sulfur-containing natural gas, which may pollute the air. Utility Model Content

[0005] In view of the problems existing in the prior art, one of the objectives of this utility model is: In a first aspect, this utility model provides a boiler combustion device, comprising: Boiler furnace, An air supply mechanism includes a buffer tank and a fan. One end of the buffer tank is connected to the fan, and the other end of the buffer tank is connected to the boiler furnace. The fan is used to supply air to the buffer tank. The buffer tank includes a tank body and a demister assembly. The demister assembly is disposed in the tank body and located at the top of the tank body. The air in the buffer tank flows into the boiler furnace through the demister assembly. A fuel supply mechanism is connected to the boiler furnace and supplies fuel to the boiler furnace.

[0006] In one embodiment, the defogging assembly includes a frame, a first air distribution plate, and a second air distribution plate. The frame is disposed inside the tank and fixed to the top of the tank. The first air distribution plate and the second air distribution plate are spaced apart in the frame along the height direction. A plurality of air vents are uniformly disposed on the first air distribution plate and the second air distribution plate.

[0007] In one embodiment, the edge region of the second air distribution plate is uniformly provided with a plurality of air vents, the central region of the second air distribution plate is a sealed plane, and the second air distribution plate is disposed directly above the first air distribution plate.

[0008] In one embodiment, the defogging assembly further includes a defogging screen disposed at the bottom of the frame, the defogging screen having a V-shaped cross-section.

[0009] In one embodiment, the buffer tank is further provided with a liquid level control component, which includes a liquid level gauge, a hydraulic control valve, and a first vent valve. The liquid level gauge is disposed on the tank body and is used to monitor the liquid level in the tank. The hydraulic control valve and the first vent valve are disposed at the bottom of the tank body. The liquid level gauge is electrically connected to the hydraulic control valve and can control the hydraulic control valve to open or close, thereby controlling the liquid level in the tank body.

[0010] In one embodiment, the boiler combustion device further includes a steam-water circulation mechanism. The boiler furnace includes a water-cooled wall, and the steam-water circulation mechanism is connected to the water-cooled wall. The steam-water circulation mechanism can separate the steam and water in the water-cooled wall, and the separated water is returned to the water-cooled wall.

[0011] In one embodiment, the steam-water circulation mechanism includes a steam drum, a riser pipe, and a downcomer pipe. The steam drum is connected to the water-cooled wall through the riser pipe and the downcomer pipe. Steam and water in the water-cooled wall enter the steam drum through the riser pipe. A separator is provided in the steam drum. The separator can separate the steam and water in the steam-water mixture. The separated water returns to the water-cooled wall through the downcomer pipe.

[0012] In one embodiment, the boiler combustion device further includes a flue gas emission mechanism connected to the boiler furnace, the flue gas emission mechanism being used to discharge flue gas from the boiler furnace.

[0013] In one embodiment, the flue gas emission device includes a chimney and a desulfurization system. The chimney is connected to the boiler furnace, and a desulfurization system is provided between the chimney and the boiler furnace. The desulfurization system is used to desulfurize the flue gas.

[0014] In one embodiment, the boiler combustion device further includes a steam treatment mechanism, which includes a superheater and a desuperheater. The superheater is disposed between the boiler furnace and the steam pipe, and the desuperheater is disposed between the superheater and the steam pipe. Compared with the prior art, the advantages of this utility model are as follows: the embodiments of this application provide a boiler combustion device, including a boiler furnace, an air supply mechanism, and a fuel supply mechanism. The air supply mechanism includes a buffer tank and a fan. By adopting the design of the buffer tank, the air is stabilized and evenly distributed before entering the furnace. Combined with the precise distribution of the fuel supply mechanism, the fuel and air are mixed more evenly, and the combustion is more complete. This reduces the emission of unburned fuel and harmful gases, and avoids sudden shutdown accidents, interruption of air supply, and the waste of a lot of time for restarting. Furthermore, the fan delivers the air to the buffer tank, where it is treated by the demisting component inside the tank, effectively removing moisture and impurities from the air. This ensures that the air entering the boiler furnace is dry and clean, avoiding the impact of moisture or particulate matter on combustion efficiency, thereby ensuring the long-term stable operation of the boiler. Attached Figure Description

[0015] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings.

[0016] Figure 1 This is a schematic diagram of the structure of a boiler combustion device provided in some embodiments of this application.

[0017] Figure 2 This is a schematic diagram of the structure of a buffer tank of a boiler combustion device provided in some embodiments of this application.

[0018] Figure 3 This is a schematic diagram of the structure of the first gas equalization plate of a boiler combustion device provided in some embodiments of this application.

[0019] Figure 4 This is a schematic diagram of the structure of the second gas equalization plate of a boiler combustion device provided in some embodiments of this application.

[0020] Figure label: 1. Fan; 2. Buffer tank; 3. Boiler furnace; 4. Steam drum; 5. Superheater; 6. Flue; 7. Economizer; 8. Chimney; 9. Desuperheater; 10. Demisting assembly; 11. Demisting screen; 12. First gas distribution plate; 13. Second gas distribution plate; 14. Level gauge; 15. Hydraulic control valve; 16. First vent valve; 17. Second vent valve; 18. Shut-off valve. Detailed Implementation

[0021] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0022] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element 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 application.

[0023] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0024] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or a joint; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0025] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0026] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0027] The present invention will be further described below with reference to the accompanying drawings.

[0028] Firstly, see Figures 1-3 An embodiment of this application provides a boiler combustion device, including a boiler furnace 3, an air supply mechanism, and a fuel supply mechanism. The air supply mechanism includes a buffer tank 2 and a fan 1. One end of the buffer tank 2 is connected to the fan 1, and the other end of the buffer tank 2 is connected to the boiler furnace 3. The fan 1 is used to supply air to the buffer tank 2. The buffer tank 2 includes a tank body and a demisting assembly 10. The demisting assembly 10 is disposed in the tank body and located at the top of the tank body. The air in the buffer tank 2 flows into the boiler furnace 3 through the demisting assembly 10. The fuel supply mechanism is connected to the boiler furnace 3 and supplies fuel to the boiler furnace 3.

[0029] The boiler combustion device provided in this embodiment uses a buffer tank 2 to stabilize and evenly distribute air before it enters the furnace. Combined with the precise distribution of fuel supply mechanism, this makes the fuel and air mix more evenly, resulting in more complete combustion, reducing the emission of unburned fuel and harmful gases, and avoiding sudden shutdown accidents, interruption of air supply, and the waste of a lot of time for restarting. Furthermore, the air is delivered to the buffer tank 2 by the fan 1 and treated by the demisting component 10 inside the tank to effectively remove moisture and impurities from the air, thereby ensuring that the air entering the boiler furnace 3 is dry and clean, avoiding the impact of moisture or particulate matter on combustion efficiency, and thus ensuring the long-term stable operation of the boiler.

[0030] In some embodiments, a shut-off valve and a pressure gauge are installed on the pipeline between the fan 1 and the buffer tank 2. The pressure gauge can monitor the air pressure entering the buffer tank 2, and the shut-off valve can disconnect the fan 1 and the buffer tank 2, which facilitates the inspection and maintenance of the fan 1 and the buffer tank 2.

[0031] In some embodiments, workers can further improve combustion thermal efficiency, reduce fuel consumption, and reduce pollutant emissions by optimizing the air-fuel mixture ratio and quality, thus meeting green environmental protection requirements.

[0032] In this embodiment, the fuel supply mechanism includes a fuel gas tank and a nitrogen tank. Both the fuel gas tank and the nitrogen tank are connected to the boiler furnace 3 via pipelines. A control valve is installed on the pipeline, which can control the fuel gas tank and the nitrogen tank to provide stable fuel gas and nitrogen for combustion in the boiler furnace 3.

[0033] like Figures 1-3 As shown, in some embodiments, the defogging assembly 10 includes a frame, a first air distribution plate 12 and a second air distribution plate 13. The frame is disposed inside the tank and fixed to the top of the tank. The first air distribution plate 12 and the second air distribution plate 13 are spaced apart in the frame along the height direction. A plurality of air vents are uniformly disposed on the first air distribution plate 12 and the second air distribution plate 13.

[0034] The demisting assembly 10 employs a double-layer air distribution plate structure (first air distribution plate 12 and second air distribution plate 13). The first air distribution plate 12 and the second air distribution plate 13 are spaced apart along the height direction and are evenly distributed with air vents. When the air passes through the air vents of the two air distribution plates, the airflow is dispersed and slowed down multiple times, so that the mist droplets and tiny particles in the air are effectively removed by collision and interception. This ensures that the air entering the boiler furnace 3 is dry and clean, and avoids the impact of moisture or impurities on combustion efficiency. In addition, the air can form a multi-level uniform flow when passing through, avoiding excessively strong or weak local airflow, thereby making the mixing of air and fuel more uniform, thus improving the completeness of combustion and reducing the emission of unburned fuel and pollutants.

[0035] like Figures 1-3 As shown, in some embodiments, the edge region of the second air distribution plate 13 is uniformly provided with a plurality of air vents, the central region of the second air distribution plate 13 is a sealed plane, and the second air distribution plate 13 is disposed directly above the first air distribution plate 12.

[0036] When air passes through the double-layer air distribution plate, the airflow is forced to diffuse towards the edge area because the center of the second air distribution plate 13 is set with a sealed area, which blocks the airflow. This prolongs the residence time of the air in the demisting component 10, making it easier for mist droplets and particles to collide and be adsorbed by the plate, thus improving the demisting effect. The concentrated distribution of the vent holes at the edge can reduce the risk of water accumulation in the central area and prevent water droplets from entering the furnace with the airflow and affecting combustion.

[0037] In addition, the second air distribution plate 13 adopts an edge ventilation hole design, which allows air to enter evenly around the perimeter of the plate, while the central sealed area can block the direct impact of high-speed airflow, avoid turbulence, and make the airflow distribution more stable. Furthermore, the first air distribution plate 12 and the second air distribution plate 13 work together to form a gradient flow. The air is first diffused by the first air distribution plate 12, and then refined and distributed by the edge holes of the second air distribution plate 13, further improving the uniformity of airflow.

[0038] like Figures 1-3As shown, in some embodiments, the defogging assembly 10 further includes a defogging screen 11, which is disposed at the bottom of the frame and has a V-shaped cross-section.

[0039] The V-shaped structure design causes multiple deflections in the airflow as it passes through the demister 11. Under inertia, the droplets collide with the mesh wall and coalesce, significantly improving the droplet capture efficiency. Furthermore, the V-shaped demister 11 can be combined with the upper double-layer air distribution plate to form a three-stage demister process of flow equalization, interception, and re-coalition, further ensuring the dryness and cleanliness of the outlet air and preventing moisture from entering the furnace and affecting combustion efficiency.

[0040] In addition, the V-shaped mesh guides and buffers the airflow, and works in conjunction with the edge ventilation holes of the upper air distribution plate to further balance the airflow velocity distribution, prevent local eddies, and improve the mixing uniformity of subsequent combustion.

[0041] like Figures 1-2 As shown, in some embodiments, the buffer tank 2 is also provided with a liquid level control component, which includes a liquid level gauge 14, a hydraulic control valve 15, and a first vent valve 16. The liquid level gauge 14 is disposed on the tank body and is used to monitor the liquid level in the tank. The hydraulic control valve 15 and the first vent valve 16 are disposed at the bottom of the tank body. The liquid level gauge 14 is electrically connected to the hydraulic control valve 15 and can control the hydraulic control valve 15 to open or close in order to control the liquid level in the tank body.

[0042] The liquid level gauge 14 continuously monitors the liquid level inside the tank. When the liquid level reaches the preset threshold, the hydraulic control valve 15 is automatically triggered to open, realizing intelligent drainage. This avoids the lag of manual intervention, thus timely discharge of condensate can maintain the dryness inside the tank, reduce air flow resistance, reduce the energy consumption of the fan 1, and improve overall energy efficiency. In addition, automated drainage can reduce the frequency of manual inspection and cleaning, thereby reducing maintenance costs.

[0043] In addition, by continuously monitoring the liquid level in the tank through the level gauge 14, it can be ensured that the liquid level is always within a safe range, preventing the risk of the equipment running dry due to excessively high liquid level or excessively low liquid level.

[0044] In some embodiments, the liquid level control assembly further includes a second vent valve 17, which is disposed at the end of the first vent valve 16 away from the tank and is connected to the first vent valve 16 by a pipeline. By connecting the first vent valve 16 and the second vent valve 17 in series, a double seal is formed, which can effectively prevent leakage or air loss caused by the failure of a single valve.

[0045] In some embodiments, the level control assembly further includes a shut-off valve 18, which is connected in series with the control valve 15 via a pipeline. The shut-off valve 18 is located between the control valve 15 and the tank body. By providing the shut-off valve 18, it can be closed to isolate the buffer tank 2 from the drain pipeline during maintenance or replacement of the drain valve and the control valve 15, thus preventing system depressurization. When the drain valve or the control valve 15 malfunctions (such as leaking), the passage can be quickly cut off by closing the shut-off valve 18, preventing a large loss of air from the tank.

[0046] like Figure 1 As shown, in some embodiments, the boiler combustion device further includes a steam-water circulation mechanism. The boiler furnace 3 includes a water-cooled wall. The steam-water circulation mechanism is connected to the water-cooled wall. The steam-water circulation mechanism can separate the steam and water in the water-cooled wall, and the separated water is returned to the water-cooled wall.

[0047] By setting up a steam-water circulation mechanism, the steam-water mixture generated inside the water-cooled wall can be efficiently separated, allowing the liquid water to quickly flow back to the water-cooled wall, realizing closed-loop water reuse, reducing boiler blowdown and makeup water requirements, saving water resources and water treatment costs, and preventing local overheating or insufficient vaporization, preventing dry burning of the water-cooled wall, and mitigating thermal stress impacts under start-up, shutdown, or variable load conditions, thus extending the service life of the water-cooled wall. This ensures uniform temperature distribution on the heating surface, improves heat transfer efficiency, and consequently reduces coal / gas consumption and carbon emissions while maintaining the same steam production.

[0048] In addition, the saturated steam after separation has high purity and can be directly used for power generation or heating, thereby improving the overall energy utilization rate of the boiler.

[0049] like Figure 1 As shown, in some embodiments, the steam-water circulation mechanism includes a steam drum 4, a riser pipe, and a downcomer pipe. The steam drum 4 is connected to the water-cooled wall through the riser pipe and the downcomer pipe. Steam and water in the water-cooled wall enter the steam drum 4 through the riser pipe. A separator is provided in the steam drum 4. The separator can separate the steam and water in the steam-water mixture. The separated water returns to the water-cooled wall through the downcomer pipe.

[0050] By setting up a self-driven circulation system with riser and downcomer pipes, no additional pumping energy consumption is required, achieving efficient medium flow. The separator installed in the steam drum 4 efficiently separates the steam-water mixture, ensuring the dryness of the output steam, thereby significantly improving the efficiency of subsequent power generation or heating equipment. The separated saturated water quickly flows back to the water-cooled wall through the downcomer pipe, keeping the heating surface continuously moist, avoiding local boiling, and fully absorbing the heat in the furnace, thereby improving the heat transfer coefficient. In addition, the separated steam is directly used for power generation or heating, improving the overall energy utilization rate of the boiler.

[0051] In this embodiment, the separator is a cyclone separator or a louvered separator.

[0052] like Figure 1 As shown, in some embodiments, the boiler combustion device further includes a flue gas emission mechanism, which is connected to the boiler furnace 3 and is used to discharge the flue gas in the boiler furnace 3.

[0053] By directly connecting the flue gas emission mechanism to the furnace, it is ensured that the high-temperature flue gas after combustion can be quickly discharged, avoiding the pressure increase caused by the accumulation of flue gas in the furnace, thereby maintaining the stability of the combustion process.

[0054] In addition, by designing the exhaust pipes and induced draft system, the negative pressure level inside the furnace can be precisely controlled to prevent flue gas leakage or cold air backflow, thereby optimizing combustion efficiency.

[0055] like Figure 1 As shown, in some embodiments, the flue gas emission mechanism includes a chimney 8 and a desulfurization system. The chimney 8 is connected to the boiler furnace 3, and a desulfurization system is provided between the chimney 8 and the boiler furnace 3. The desulfurization system is used to desulfurize the flue gas.

[0056] By setting up a desulfurization system, SO2 can be removed from the flue gas discharged from the boiler furnace 3, thereby controlling the emission concentration of the flue gas and meeting emission standards to avoid air pollution, significantly improving the environmental performance and operating economy of the boiler system.

[0057] like Figure 1 As shown, in some embodiments, the boiler combustion device further includes a steam treatment mechanism, which includes a superheater 5 and a desuperheater 9. The superheater 5 is disposed on the flue 6 between the boiler furnace 3 and the steam pipe, and the desuperheater 9 is disposed on the flue 6 between the superheater 5 and the steam pipe.

[0058] By setting up a steam treatment mechanism, the temperature and quality of the steam produced by the boiler can be precisely controlled and optimized, thereby significantly improving the energy utilization efficiency and operational safety of the steam system. By setting up a superheater 5, the saturated steam produced in the furnace can be reheated, greatly increasing the steam temperature and thus greatly improving the thermal efficiency of the subsequent generator set. In addition, by setting up a desuperheater 9, the temperature of the hot steam can be stably controlled, avoiding excessively high steam temperature after secondary heating by the superheater 5, which could cause thermal stress damage to various components.

[0059] In some embodiments, an economizer 7 is also provided on the side of the flue 6 away from the boiler furnace 3. The flue gas in the boiler furnace 3 can enter the economizer 7. The economizer 7 absorbs the waste heat of the flue gas through heat exchange tubes or finned tubes, preheats the low-temperature boiler feedwater, and then sends it into the boiler drum 4, thereby improving the system thermal efficiency and reducing fuel consumption.

[0060] In some embodiments, a front hand valve, a pressure regulating valve, and a rear hand valve are also provided on the pipeline between the buffer tank 2 and the boiler furnace 3. The front hand valve, pressure regulating valve, and rear hand valve are arranged in sequence. When the regulating valve needs maintenance, replacement, or malfunction, closing the front hand valve and the rear hand valve can cut off the upstream and downstream media, thereby ensuring the safety of operation when maintaining the pressure regulating valve.

[0061] In some embodiments, a pressure gauge, a flow meter, and a temperature gauge are installed on the pipeline between the buffer tank 2 and the boiler furnace 3, which can monitor and control the air entering the boiler furnace 3, thereby enabling better combustion in the boiler furnace 3.

[0062] Although the present invention has been described with reference to preferred embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A boiler combustion device, characterized in that, include: Boiler furnace, An air supply mechanism includes a buffer tank and a fan. One end of the buffer tank is connected to the fan, and the other end of the buffer tank is connected to the boiler furnace. The fan is used to supply air to the buffer tank. The buffer tank includes a tank body and a demister assembly. The demister assembly is disposed in the tank body and located at the top of the tank body. The air in the buffer tank flows into the boiler furnace through the demister assembly. A fuel supply mechanism is connected to the boiler furnace and supplies fuel to the boiler furnace.

2. The boiler combustion device according to claim 1, characterized in that, The defogging assembly includes a frame, a first air distribution plate, and a second air distribution plate. The frame is disposed inside the tank and fixed to the top of the tank. The first air distribution plate and the second air distribution plate are spaced apart in the frame along the height direction. Multiple air vents are evenly distributed on the first air distribution plate and the second air distribution plate.

3. The boiler combustion device according to claim 2, characterized in that, The second air distribution plate has multiple air holes evenly distributed on its edge area, and the central area of ​​the second air distribution plate is a sealed plane. The second air distribution plate is located directly above the first air distribution plate.

4. The boiler combustion device according to claim 2, characterized in that, The defogging assembly also includes a defogging screen, which is disposed at the bottom of the frame and has a V-shaped cross-section.

5. The boiler combustion device according to claim 1, characterized in that, The buffer tank is also equipped with a liquid level control component, which includes a liquid level gauge, a hydraulic control valve, and a first vent valve. The liquid level gauge is installed on the tank body and is used to monitor the liquid level in the tank. The hydraulic control valve and the first vent valve are installed at the bottom of the tank body. The liquid level gauge is electrically connected to the hydraulic control valve and can control the hydraulic control valve to open or close, thereby controlling the liquid level in the tank.

6. The boiler combustion device according to claim 1, characterized in that, The boiler combustion device also includes a steam-water circulation mechanism. The boiler furnace includes a water-cooled wall. The steam-water circulation mechanism is connected to the water-cooled wall. The steam-water circulation mechanism can separate the steam and water in the water-cooled wall, and the separated water is returned to the water-cooled wall.

7. The boiler combustion device according to claim 6, characterized in that, The steam-water circulation mechanism includes a steam drum, a riser pipe, and a downcomer pipe. The steam drum is connected to the water-cooled wall through the riser pipe and the downcomer pipe. Steam and water in the water-cooled wall enter the steam drum through the riser pipe. A separator is installed in the steam drum. The separator can separate the steam and water in the steam-water mixture. The separated water returns to the water-cooled wall through the downcomer pipe.

8. The boiler combustion device according to claim 1, characterized in that, The boiler combustion device also includes a flue gas emission mechanism, which is connected to the boiler furnace and is used to discharge the flue gas inside the boiler furnace.

9. The boiler combustion device according to claim 8, characterized in that, The flue gas emission mechanism includes a chimney and a desulfurization system. The chimney is connected to the boiler furnace, and a desulfurization system is installed between the chimney and the boiler furnace. The desulfurization system is used to desulfurize the flue gas.

10. The boiler combustion device according to claim 1, characterized in that, The boiler combustion device also includes a steam treatment mechanism, which includes a superheater and a desuperheater. The superheater is disposed between the boiler furnace and the steam pipe, and the desuperheater is disposed between the superheater and the steam pipe.

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