Fire hole structure of incinerator

Abstract

The application discloses a kind of incinerator sight hole structures, comprising: being arranged on the sight hole frame of boiler main combustion chamber furnace door, sight hole frame is provided with sight glass, rotatable baffle is arranged in sight hole frame, handle for driving baffle rotation is sealingly rotatably arranged in one side of sight hole frame, the side of baffle close to sight glass is fixed with purge pipe along the width direction of baffle, and the pipe wall of purge pipe is provided with a purge slit extending along its length direction;Handle is hollow tubular structure, and one end of handle is communicated with purge pipe, and the other end is provided with air inlet for entering compressed air;The end of purge pipe away from handle is closed structure.The utility model can optimize purging effect, reduce compressed air consumption and simultaneously realize handle effective cooling, to meet the safe, efficient, energy-saving operation demand of power plant.

Description

Technical Field

[0001] This application relates to the field of waste incineration equipment technology, and in particular to a structure for an observation hole in an incinerator. Background Technology

[0002] In the field of waste treatment, waste-to-energy incineration is an important technological means to achieve waste reduction, harmlessness, and resource recovery. Grate furnaces, due to their strong adaptability to waste and stable combustion, have become the most commonly used incineration equipment in waste-to-energy power plants. During grate furnace operation, accurate monitoring of the combustion status of waste within the furnace is crucial for ensuring the safe and stable operation of the boiler, improving incineration efficiency, and controlling pollutant emissions. Although the boiler system is equipped with a furnace flame monitor as a remote monitoring device, limitations in the monitor's monitoring angle, resolution, and interference under complex combustion conditions mean that when combustion anomalies occur (such as partial flameout, coking, or waste accumulation), maintenance personnel still need to observe the flame locally through the observation hole on the main combustion chamber door to directly and accurately judge the actual combustion situation within the furnace, and then adjust combustion parameters in a timely manner to prevent the fault from escalating.

[0003] However, since the observation hole is directly opened at the furnace door of the main combustion chamber of the boiler, it is close to the center of the flame in the furnace and is in a high-temperature environment for a long time (the temperature inside the furnace can usually reach 800-1200℃). In order to avoid the glass of the observation hole from cracking and the obscuring due to the accumulation of soot in the furnace, the existing observation holes are generally equipped with a compressed air blowing and cooling system to cool down the glass of the observation hole and remove the accumulated dust on the surface of the window to ensure the unobstructed observation channel.

[0004] However, current mainstream compressed air purging and cooling solutions for observation holes have significant design flaws: to achieve the purging and cooling function, a single circular vent is typically opened directly above the observation hole, through which compressed air is injected directly into the viewing window area. Limited by the single venting method and the limited airflow diffusion path, the compressed air can only effectively purge a localized area near the circular vent, while the edges of the viewing window and other areas far from the vent suffer from poor purging due to insufficient airflow coverage. To compensate for this deficiency, existing technologies often increase the supply flow rate of compressed air to expand the purging coverage area, but this method results in a significant waste of compressed air resources, thereby increasing the power plant's operating energy consumption and costs. Meanwhile, the baffle handle of the observation hole, used by maintenance personnel to open / close the observation hole, is mostly made of metal, which has excellent thermal conductivity. Since the observation hole is entirely exposed to the high-temperature radiation and conduction environment of the boiler, and current designs do not include any cooling protection structure for the baffle handle, the heat generated during boiler operation is continuously conducted to the handle through the furnace door and baffle, causing the handle to maintain a high temperature for extended periods. If maintenance personnel accidentally touch a high-temperature handle while performing on-site fire monitoring, they are at high risk of burns, which seriously threatens their operational safety and also increases the safety management risks of the power plant.

[0005] In summary, existing observation ports for waste incineration power plant boilers have significant shortcomings in terms of compressed air purging efficiency and handle safety protection. Therefore, this utility model proposes a new structure for the observation port of an incinerator. Utility Model Content

[0006] This application provides a structure for an observation hole in an incinerator, which optimizes the purging effect, reduces compressed air consumption, and simultaneously achieves effective cooling of the handle, thereby meeting the requirements for safe, efficient, and energy-saving operation of power plants.

[0007] In view of this, this application provides a structure for a viewing hole in an incinerator, comprising: a viewing hole frame disposed on the furnace door of the main combustion chamber of the boiler;

[0008] The fire-viewing hole frame is equipped with fire-viewing glass;

[0009] A rotatable baffle is installed inside the fire-viewing hole frame;

[0010] A handle for driving the baffle to rotate is provided on one side of the fire-viewing hole frame.

[0011] A purge pipe is fixed along the width direction of the baffle on the side of the baffle near the fire-viewing glass.

[0012] A slit extending along the length of the tube is provided on the tube wall of the purge tube.

[0013] The handle is a hollow tubular structure, and one end of the handle is connected to the purge pipe, while the other end is provided with an air inlet for introducing compressed air.

[0014] The end of the purge tube furthest from the handle is a closed structure.

[0015] Optionally, the purge slit is located on the side of the purge tube away from the baffle.

[0016] Optionally, the length of the purge slit is greater than or equal to nine-tenths of the width of the baffle.

[0017] Optionally, the width of the purge slit is 1.5~2.5mm.

[0018] Optionally, the air inlet is provided with a quick connector for connecting to an external air source.

[0019] Optionally, a gap is reserved between the lower part of the baffle and the frame of the fire observation hole.

[0020] Optionally, the handle is rotatably mounted on one side of the observation hole frame via a rotary sealing structure.

[0021] Optionally, the rotary sealing structure is a stuffing box sealing assembly disposed between the handle and the viewing hole frame.

[0022] Optionally, the handle and the purge tube are integrally formed.

[0023] Optionally, the handle is L-shaped.

[0024] As can be seen from the above technical solutions, the embodiments of this application have the following advantages: The structure of the observation hole in this incinerator replaces the existing design of only opening a single circular vent hole above the observation hole by fixing a purge pipe along the width of the baffle on the side of the baffle near the observation glass, and opening a purge slit extending along its length on the wall of the purge pipe. This allows compressed air to evenly cover the surface of the observation glass along the width of the baffle, completely solving the problem in the existing technology where compressed air can only purge locally and the purge effect at the edge of the window is poor. It can effectively cool the observation glass while ensuring the clarity of the observation glass, without the need to increase the size of the baffle. The compressed air supply flow compensates for insufficient purging coverage, significantly reducing the waste of compressed air resources and lowering the power plant's operating energy consumption and costs. Furthermore, by designing the handle as a hollow tubular structure connected to the purging pipe, the compressed air can flow through the hollow handle while performing the purging function. This airflow removes heat from the handle, avoiding the situation in existing technologies where metal handles remain at high temperatures due to the lack of cooling and protection structures. This fundamentally eliminates the safety hazard of burns caused by maintenance personnel accidentally touching the hot handle, improving operational safety and reducing the risks of power plant safety production management. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the internal structure of the observation hole in the incinerator in an embodiment of this application;

[0026] The attached figures are labeled as follows:

[0027] 1-Fire viewing hole frame, 2-Baffle, 3-Purge pipe, 4-Handle, 5-Purge slit, 6-Quick connector, 7-Rotary sealing structure. Detailed Implementation

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

[0029] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] Unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0031] This application provides an embodiment of an observation hole structure for an incinerator. Please refer to the following for details. Figure 1 .

[0032] The observation hole structure of the incinerator in this embodiment includes: an observation hole frame 1 set on the furnace door of the main combustion chamber of the boiler, an observation glass set on the observation hole frame 1, a rotatable baffle 2 set inside the observation hole frame 1, a handle 4 for driving the baffle 2 to rotate is rotatably set on one side of the observation hole frame 1, a purge pipe 3 is fixed along the width direction of the baffle 2 on the side of the baffle 2 near the observation glass, and a purge slit 5 extending along its length direction is opened on the pipe wall of the purge pipe 3; the handle 4 is a hollow tubular structure, and one end of the handle 4 is connected to the purge pipe 3, and the other end is provided with an air inlet for introducing compressed air; the end of the purge pipe 3 away from the handle 4 is a closed structure.

[0033] It should be noted that the structure of the observation hole in this incinerator replaces the existing design of only having a single circular vent above the observation hole. This is achieved by fixing a purge pipe 3 along the width of the baffle 2 near the observation glass, and opening a purge slit 5 extending along the length of the purge pipe 3 on its wall. This allows compressed air to evenly cover the surface of the observation glass along the width of the baffle 2, completely solving the problem of limited purge by compressed air and poor purge effect at the edge of the window in the existing technology. It can effectively cool the observation glass while ensuring its clarity, without the need to increase the compressed air supply flow rate. This design compensates for insufficient purging coverage, significantly reduces the waste of compressed air resources, and lowers the power plant's operating energy consumption and costs. Furthermore, by designing the handle 4 as a hollow tubular structure and connecting it to the purging pipe 3, the compressed air can flow through the hollow handle 4 while performing the purging function. This airflow carries away the heat from the handle 4, avoiding the situation in existing technologies where the metal handle 4 remains at a high temperature for a long time due to the lack of a cooling and protection structure. This fundamentally eliminates the safety hazard of burns caused by maintenance personnel accidentally touching the high-temperature handle 4, improving operational safety and reducing the risks of power plant safety production management.

[0034] The above is Embodiment 1 of an incinerator observation hole structure provided in this application. The following is Embodiment 2 of an incinerator observation hole structure provided in this application. Please refer to the following for details. Figure 1 .

[0035] The incinerator observation hole structure in this embodiment includes: an observation hole frame 1 installed on the furnace door of the main combustion chamber of the boiler; an observation glass installed on the observation hole frame 1; a rotatable baffle 2 installed inside the observation hole frame 1; a handle 4 for driving the baffle 2 to rotate is rotatably installed on one side of the observation hole frame 1; a purge pipe 3 is fixed along the width direction of the baffle 2 on the side of the baffle 2 near the observation glass; a purge slit 5 extending along the length direction is opened on the wall of the purge pipe 3; the handle 4 is a hollow tubular structure, and one end of the handle 4 is connected to the purge pipe 3, and the other end is provided with an air inlet for introducing compressed air; the end of the purge pipe 3 away from the handle 4 is a closed structure to ensure that the compressed air can be concentrated and sprayed out from the purge slit 5, further optimizing the purge efficiency.

[0036] Understandably, this application uses the handle 4 as a compressed air input pipe and continuously supplies air to cool it down, ensuring that the temperature of the handle 4 remains at room temperature, thereby reducing the risk of burns to personnel; at the same time, this application optimizes the compressed air ejection position, which can reduce the amount of compressed air used and save energy.

[0037] Specifically, the purge pipe 3 is welded to the baffle 2, which is used to block the high-temperature flue gas and prevent the observation glass from directly facing it.

[0038] The purge slit 5 is located on the side of the purge pipe 3 away from the baffle 2, and its opening is a horizontal opening.

[0039] The length of the purge slit 5 is greater than or equal to nine-tenths of the width of the baffle 2. Preferably, the length of the purge slit 5 is equal to the width of the baffle 2.

[0040] The width of the purge slit 5 is 1.5~2.5mm. Preferably, the width of the purge slit 5 is 2mm.

[0041] The air inlet is equipped with a quick connector 6 for connecting to an external air source, which can be easily disassembled when the furnace is shut down.

[0042] A gap of 4-6 mm is reserved between the lower part of the baffle 2 and the viewing hole frame 1. Preferably, the gap is 5 mm.

[0043] The handle 4 is sealed and rotated on one side of the observation hole frame 1 by the rotating sealing structure 7, which ensures the structural stability and sealing when the handle 4 drives the baffle 2 to rotate.

[0044] The rotary sealing structure 7 can be a stuffing box sealing assembly disposed between the handle 4 and the viewing hole frame 1. Specifically, the stuffing box sealing assembly includes asbestos sealing packing, a metal gland, and fastening bolts; a packing groove is opened in the shaft hole of the viewing hole frame 1, and the asbestos sealing packing is filled in the packing groove, surrounding the handle 4; the metal gland is fixed to the viewing hole frame 1 by fastening bolts, and presses the asbestos sealing packing into the packing groove to achieve a dynamic seal between the handle 4 and the viewing hole frame 1.

[0045] The handle 4 and the purge tube 3 are integrally molded; both the purge tube 3 and the handle 4 are made of metal; the handle 4 is L-shaped.

[0046] In practice, compressed air is introduced into the internal cavity of the handle 4 via quick connector 6 (the compressed air pressure needs to be greater than 0.3 MPa). While the gas is being delivered, the handle 4 is cooled, ensuring its temperature remains at room temperature to reduce the risk of burns. The air then enters the purge pipe 3 and exits through the purge slit 5, forming a uniform purge air curtain over the viewing glass. When not viewing the fire, the purge slit 5 faces the viewing glass, and the compressed air cools the glass and creates positive pressure in the area of ​​the baffle 2, preventing fly ash from entering the viewing area. When viewing the fire, the operator rotates the baffle 2 90° using the handle 4. This changes the direction of the purge slit 5, allowing compressed air to purge the lower part of the viewing hole, removing accumulated ash and ensuring a complete viewing view.

[0047] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A structure for an observation hole in an incinerator, characterized in that, include: A frame for viewing holes installed on the furnace door of the main combustion chamber of the boiler; The fire-viewing hole frame is equipped with fire-viewing glass; A rotatable baffle is installed inside the fire-viewing hole frame; A handle for driving the baffle to rotate is provided on one side of the fire-viewing hole frame. A purge pipe is fixed along the width direction of the baffle on the side of the baffle near the fire-viewing glass. A slit extending along the length of the tube is provided on the tube wall of the purge tube. The handle is a hollow tubular structure, and one end of the handle is connected to the purge pipe, while the other end is provided with an air inlet for introducing compressed air. The end of the purge tube furthest from the handle is a closed structure.

2. The structure of the observation hole in the incinerator according to claim 1, characterized in that, The purge slit is located on the side of the purge pipe away from the baffle.

3. The structure of the observation hole in the incinerator according to claim 1, characterized in that, The length of the purge slit is greater than or equal to nine-tenths of the width of the baffle.

4. The structure of the observation hole in the incinerator according to claim 1, characterized in that, The width of the purge slit is 1.5~2.5mm.

5. The structure of the observation hole in the incinerator according to claim 1, characterized in that, The air inlet is equipped with a quick connector for connecting to an external air source.

6. The structure of the observation hole for the incinerator according to claim 1, characterized in that, A gap is reserved between the lower part of the baffle and the frame of the fire observation hole.

7. The structure of the observation hole in the incinerator according to claim 1, characterized in that, The handle is rotatably mounted on one side of the observation hole frame via a rotary sealing structure.

8. The structure of the observation hole in the incinerator according to claim 7, characterized in that, The rotary sealing structure is a stuffing box sealing assembly disposed between the handle and the viewing hole frame.

9. The structure of the observation hole in the incinerator according to claim 1, characterized in that, The handle and the purge tube are integrally formed.

10. The structure of the observation hole in the incinerator according to claim 1, characterized in that, The handle is L-shaped.

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