A flue gas detection device for a natural gas power plant

Abstract

This invention relates to the field of natural gas detection technology and discloses a flue gas detection device for natural gas power plants. The device includes a main body and a connecting frame installed between two flue gas pipes. A filter collection component, a backflushing cleaning component, a flow guiding component, and a fixing component are provided between the main body and the connecting frame. The invention features a backflushing cleaning component; specifically, the connecting seat is threadedly connected to the limiting cap, facilitating installation. The porous gas pipe surface has uniform pores, ensuring comprehensive airflow coverage when backflushing from the inside of the filter screen, thoroughly removing accumulated dust and impurities. A second solenoid valve can control the backflushing operation of each filter screen individually or simultaneously, offering high flexibility and ensuring the overall detection process is not interrupted during backflushing, thus guaranteeing the continuity of flue gas detection, extending the filter screen's service life, and reducing maintenance costs.

Description

Technical Field

[0001] This invention relates to the field of natural gas detection technology, specifically to a flue gas detection device for natural gas power plants. Background Technology

[0002] Natural gas power plants produce carbon dioxide (CO2) and nitrogen oxides (NOx) during operation. x Flue gas containing components such as sulfur dioxide (SO2) and sulfides (Sulfur oxides) can pollute the environment if emissions do not meet standards. Therefore, it is necessary to monitor the composition and concentration of flue gas in real time using flue gas detection equipment to ensure that emissions comply with national standards. Currently, flue gas detection equipment is commonly used for this purpose. However, existing flue gas detection equipment has the following problems in use: During the use of flue gas detection equipment, a filter screen is usually installed at the flue gas inlet to filter dust from the flue gas. However, the filter screen is prone to clogging after long-term use. If it is not cleaned in time, it will affect the flue gas detection equipment.

[0003] However, in actual use, the filter screen is usually complicated to install and often needs to be disassembled for cleaning after long-term use. Because disassembly is cumbersome and the cleaning and maintenance time is long, it affects the testing process. Therefore, improvements are needed. Summary of the Invention

[0004] The purpose of this invention is to provide a flue gas detection device for natural gas power plants to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A flue gas detection device for a natural gas power plant includes a main body and a connecting frame installed between two flue gas pipes. A filter collection component, a backflushing cleaning component, a flow guiding component, and a fixing component are provided between the main body and the connecting frame. The filter collection component is located inside and outside the connecting frame. The filter collection component includes several filter screens installed inside the connecting frame, a first collection tube, and a second collection tube. One end of each filter screen is fixedly connected to a limit cap. Multiple filter screens are connected by the first and second collection tubes to filter and collect flue gas and transport it to the main body of the flue gas detection equipment for detection. The backflush cleaning component is located on one side of the connecting frame. The backflush cleaning component includes a connecting seat installed at one end of the filter screen. A multi-hole air pipe is installed at one end of the connecting seat. Air is circulated through the multi-hole air pipe to backflush the filter screen from the inside. The flow guiding component is located inside the connecting frame. The flow guiding component includes several limiting plates and several air guide plates symmetrically arranged relative to the limiting plates. The symmetrically arranged air guide plates are used to guide the flue gas flowing inside the flue gas duct, so as to prevent the flue gas from sticking to the surface of the filter screen. The fixing component is disposed between the flue gas duct and the connecting frame. The fixing component includes several pins, which are used to achieve quick positioning and fixing of the flue gas duct and the connecting frame.

[0006] Optionally, the backflush cleaning assembly further includes an insertion hole, a second solenoid valve, and a main air supply pipe. The insertion hole is located in the middle of the limiting screw cap, the second solenoid valve is fixedly installed at one end of the connecting seat, and the main air supply pipe is located on one side of several connecting seats.

[0007] Optionally, the connector and the insertion hole are connected by a thread, the porous air tube is connected to the output end of the second solenoid valve through the connector, the connector is connected to the main air supply pipe through the setting of the second solenoid valve, and a number of air holes are evenly distributed on the surface of the porous air tube.

[0008] Optionally, the filter collection assembly further includes an air pump, a first solenoid valve, a connecting air hood, several internal threaded interfaces, an external threaded connector, and a mounting groove. The suction end of the air pump is connected to one end of the first collection tube. The first solenoid valve is fixedly installed at the other end of the first collection tube. The connecting air hood is fixedly installed on one side of the connecting frame. Several internal threaded interfaces are opened inside the connecting frame. The external threaded connector is opened at one end of the filter screen. The mounting groove is opened on one side of the connecting frame. The output end of the air pump is connected to the detection end of the main body of the flue gas detection equipment. The connecting air hood is connected to several internal threaded interfaces. The external threaded connector matches the internal threaded interfaces. The shape of the mounting groove matches the cross-sectional shape of the filter screen.

[0009] Optionally, one end of the first collection tube is connected to one end of the second collection tube, and the filter screen is fixedly installed inside the connecting frame through the cooperation of the external threaded joint and the internal threaded interface.

[0010] Optionally, the flow guiding assembly further includes a first connecting rod, a second connecting rod, and an electric telescopic rod. One end of the first connecting rod is fixedly installed at one end of the air guide plate shaft. The second connecting rod is movably installed between one end of several first connecting rods, and the second connecting rod is rotatably connected to the first connecting rod. One end of the electric telescopic rod is rotatably connected to one end of one of the first connecting rods, and the other end of the electric telescopic rod is rotatably connected to the side wall of the connecting frame.

[0011] Optionally, several of the limiting plates are fixedly connected to the inside of the connecting frame, and the limiting plates are located on one side of the filter screen. Two air guide plates are symmetrically arranged on both sides of the limiting plates, and the air guide plates are rotatably connected to the inside of the connecting frame.

[0012] Optionally, the fixing assembly further includes a double internal thread handle, two adjusting screws, a locking block, and a locking groove. The two adjusting screws are respectively threaded to both ends of the double internal thread handle, the locking block is fixedly connected to one end of the adjusting screw, and the locking groove is formed on the inner side of one end of the locking block.

[0013] Optionally, one end of several of the pins is fixedly connected to one end of the connecting frame, and the pins are evenly distributed at both ends of the connecting frame, and the flue gas pipe has holes that match the pins.

[0014] Optionally, the card block is engaged at one edge of the flue gas duct, and the card slot is fitted onto one end of one of the pins.

[0015] This invention has at least the following beneficial effects: (1) This solution uses a backflushing cleaning component. Specifically, the connecting seat and the limit cap are connected by threads, making installation convenient. The porous air pipe has uniform air holes on its surface. When backflushing from the inside of the filter screen, the airflow covers the entire area and can thoroughly remove the accumulated dust and impurities on the filter screen. The second solenoid valve can control the backflushing operation of each filter screen individually or synchronously, which is highly flexible. The backflushing does not interrupt the overall detection process, ensuring the continuity of flue gas detection, while extending the service life of the filter screen and reducing maintenance costs. (2) This solution sets up a filter collection component. Specifically, through the cooperation of the internal thread interface and the external thread connector, combined with the positioning of the mounting groove, the filter screen can be quickly installed and disassembled, solving the problem of complex installation of traditional filter screens. After installation, the structure is stable and not easy to loosen, which facilitates the subsequent replacement and maintenance of the filter screen. In addition, with the coordinated action of the air pump, the first collection tube and the connecting air hood, the flue gas filtered by the filter screen can be collected efficiently, ensuring that the sample delivered to the detection body is free from impurities and improving the detection accuracy. (3) This solution sets up a flow guiding component. Specifically, the symmetrically arranged air guide plates can guide the flue gas in the flue gas duct to flow in an orderly manner. When the flue gas is not being collected, it can prevent the flue gas from directly adhering to the filter screen, reduce the risk of blockage from the source, and solve the problem of traditional flue gas easily adhering and causing filter screen blockage. When collecting flue gas, the electric telescopic rod drives multiple air guide plates to adjust their angles synchronously through the first and second connecting rods, so that the flue gas can pass through the filter screen, making it easier to collect the flue gas more effectively. (4) This solution sets up a fixed component. Specifically, the pin can be quickly inserted into the matching hole of the flue gas pipe to achieve the initial positioning of the connection frame and the pipe without repeated alignment, thus improving installation efficiency. At the same time, rotating the double internal thread handle can drive the adjusting screws at both ends to clamp the edge of the pipe with the clamping block. The pin is fitted in the slot to further reinforce the connection. A firm connection can be completed without complicated tools, solving the problem of cumbersome traditional connection methods. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, 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 the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a partial structural diagram of the present invention; Figure 3 This is a partial exploded view of the backflush cleaning component of the present invention; Figure 4 This is a schematic diagram of the connecting frame structure of the present invention; Figure 5 This is a schematic diagram of the flow guiding component structure of the present invention; Figure 6 This is a partial structural diagram of the fixing component of the present invention.

[0017] The attached diagram lists the components represented by each number as follows: 1. Flue gas duct; 2. Connecting frame; 3. Main body of flue gas detection equipment; 301. Air pump; 302. First collection pipe; 303. First solenoid valve; 304. Second collection pipe; 305. Connecting hood; 401. Internal thread interface; 402. Filter screen; 403. External thread connector; 404. Mounting groove; 405. Limiting cap; 501. Insertion hole; 502. Connecting seat; 503. Multi-hole air pipe; 504. Second solenoid valve; 505. Main gas pipe; 601. Limiting plate; 602. Air guide plate; 603. First connecting rod; 604. Second connecting rod; 605. Electric telescopic rod; 701. Pin; 702. Double internal thread handle; 703. Adjusting screw; 704. Locking block; 705. Locking groove. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figures 1-6 The present invention provides a flue gas detection device for a natural gas power plant, including a flue gas detection device body 3 and a connecting frame 2 installed between two flue gas pipes 1. A filter collection component, a backflushing cleaning component, a flow guiding component and a fixing component are provided between the flue gas detection device body 3 and the connecting frame 2. The backflush cleaning component is located on one side of the connecting frame 2. The backflush cleaning component includes a connecting seat 502 installed at one end of the filter screen 402. A porous air pipe 503 is installed at one end of the connecting seat 502. Air is circulated through the porous air pipe 503 to backflush the filter screen 402 from the inside of the filter screen 402. In some embodiments, see Figure 1 , Figure 3 The backflush cleaning assembly also includes an insertion hole 501, a second solenoid valve 504, and a main air supply pipe 505. The insertion hole 501 is located in the middle of the limiting cap 405. The second solenoid valve 504 is fixedly installed at one end of the connecting seat 502. The main air supply pipe 505 is located on one side of several connecting seats 502. The connecting seats 502 and the insertion hole 501 are connected by threads. The porous air pipe 503 is connected to the output end of the second solenoid valve 504 through the connecting seat 502. The connecting seat 502 is connected to the main air supply pipe 505 through the setting of the second solenoid valve 504. Several air holes are evenly distributed on the surface of the porous air pipe 503.

[0020] It should be noted that the connecting seat 502 and the limiting cap 405 (through the insertion hole 501) are connected by threads, which not only makes installation and disassembly convenient, but also ensures the sealing of the connection and prevents flue gas from leaking from gaps and affecting the detection accuracy. The evenly distributed air holes on the surface of the porous air pipe 503 allow the backflushing airflow to fully cover the inside of the filter screen 402, thoroughly removing the accumulated dust and impurities attached to the filter screen 402 and preventing the decrease in filtration efficiency caused by incomplete local cleaning. The second solenoid valve 504 has an independent control function. The operator can open the corresponding backflushing channel individually or simultaneously according to the actual blockage of different filter screens 402 without interrupting the overall detection process, effectively ensuring the continuity of flue gas detection. The main gas supply pipe 505 provides a unified and stable high-pressure air source for all connecting seats 502, ensuring that the backflushing pressure of each porous air pipe 503 is consistent, further improving the stability of the cleaning effect.

[0021] The filter collection component is set inside and outside the connecting frame 2. The filter collection component includes several filter screens 402 installed inside the connecting frame 2, a first collection tube 302 and a second collection tube 304. One end of the filter screen 402 is fixedly connected to a limit cap 405. Multiple filter screens 402 are connected by the first collection tube 302 and the second collection tube 304 to filter and collect the flue gas and deliver it to the main body 3 of the flue gas detection equipment for detection. In some embodiments, see Figure 1 , Figure 4The filter collection assembly also includes an air pump 301, a first solenoid valve 303, a connecting air hood 305, several internal threaded interfaces 401, external threaded connectors 403, and a mounting slot 404. The suction end of the air pump 301 is connected to one end of the first collection tube 302. The first solenoid valve 303 is fixedly installed at the other end of the first collection tube 302. The connecting air hood 305 is fixedly installed on one side of the connecting frame 2. Several internal threaded interfaces 401 are opened inside the connecting frame 2. The external threaded connectors 403 are opened at one end of the filter screen 402. The mounting slot... 404 is located on one side of the connecting frame 2. The output end of the air pump 301 is connected to the detection end of the main body 3 of the flue gas detection equipment. The connecting hood 305 is connected to several internal thread interfaces 401. The external thread connector 403 matches the internal thread interface 401. The shape of the mounting groove 404 matches the cross-sectional shape of the filter screen 402. One end of the first collection tube 302 is connected to one end of the second collection tube 304. The filter screen 402 is fixedly installed inside the connecting frame 2 through the cooperation of the external thread connector 403 and the internal thread interface 401.

[0022] It should be noted that the threaded engagement between the internal threaded interface 401 and the external threaded connector 403, combined with the positioning function of the mounting groove 404 for the filter screen 402, enables quick installation and removal of the filter screen 402. During installation, the filter screen 402 is aligned with the mounting groove 404 and inserted; rotation secures it via the threads. For removal, rotation in the opposite direction removes it. This solves the problem of cumbersome and time-consuming installation steps in traditional filter screen installation. The air pump 301 serves as the power source, drawing in the filtered flue gas through the first collection pipe 302. The first solenoid valve 303... The on / off state of the collection channel can be flexibly controlled, making it easy to adjust the collection timing according to the detection cycle or flue gas flow rate; the connecting hood 305 is connected to multiple internal thread interfaces 401, which can collect the flue gas filtered by multiple sets of filter screens 402, ensuring that the collected flue gas sample volume is sufficient and the composition is uniform, avoiding insufficient sample representativeness caused by collection from a single filter screen 402; the shape of the mounting groove 404 is perfectly matched with the cross-section of the filter screen 402, which can limit the radial displacement of the filter screen 402, prevent the filter screen 402 from shaking when the flue gas flows, and improve the stability of the filtration process.

[0023] The flow guiding component is located inside the connecting frame 2. The flow guiding component includes several limiting plates 601 and several air guide plates 602 symmetrically arranged relative to the limiting plates 601. The symmetrically arranged air guide plates 602 are used to guide the flue gas flowing inside the flue gas duct 1 to prevent the flue gas from sticking to the surface of the filter screen 402. In some embodiments, see Figure 4 , Figure 5The flow guiding assembly also includes a first connecting rod 603, a second connecting rod 604, and an electric telescopic rod 605. One end of the first connecting rod 603 is fixedly installed on one end of the rotating shaft of the air guide plate 602. The second connecting rod 604 is movably installed between one end of several first connecting rods 603, and the second connecting rod 604 is rotatably connected to the first connecting rod 603. One end of the electric telescopic rod 605 is rotatably connected to one end of one of the first connecting rods 603, and the other end of the electric telescopic rod 605 is rotatably connected to the side wall of the connecting frame 2. Several limiting plates 601 are fixedly connected to the inside of the connecting frame 2, and the limiting plates 601 are located on one side of the filter screen 402. Two air guide plates 602 are symmetrically arranged on both sides of the limiting plates 601, and the air guide plates 602 are rotatably connected to the inside of the connecting frame 2.

[0024] It should be noted that the limiting plate 601 is fixed inside the connecting frame 2 and located on one side of the filter screen 402. This not only provides initial guidance for the flow of flue gas but also prevents mechanical interference between the guide plate 602 and the filter screen 402 when adjusting its angle. The guide plates 602, symmetrically arranged on both sides of the limiting plate 601, can guide the flue gas along the central axis of the flue gas duct 1 when not collecting data, significantly reducing direct contact between the flue gas and the surface of the filter screen 402, thus reducing the probability of dust adhesion at the source and delaying filter screen 402 clogging. The electric telescopic rod 605, through its telescopic movement... The first connecting rod 603 connected to it rotates, and with the help of the linkage of the second connecting rod 604, the angle of all the air guide plates 602 is adjusted synchronously to ensure that the flue gas flow direction is consistent. During collection, the flue gas can be accurately guided to the filter screen 402 to improve the collection efficiency. When not collecting, the flue gas is guided to avoid the filter screen 402. The air guide plate 602 and the connecting frame 2 are rotatably connected to ensure smooth adjustment. The air guide angle can be flexibly adjusted according to the flue gas flow rate (for example, the air guide angle is increased when the flow rate is large to further reduce the impact of flue gas on the filter screen 402).

[0025] The fixing component is set between the flue gas duct 1 and the connecting frame 2. The fixing component includes several pins 701, which are used to achieve quick positioning and fixing of the flue gas duct 1 and the connecting frame 2. In some embodiments, see Figure 1 , Figure 6 The fixing assembly also includes a double internal thread handle 702, two adjusting screws 703, a locking block 704, and a locking groove 705. The two adjusting screws 703 are respectively threaded to both ends of the double internal thread handle 702. The locking block 704 is fixedly connected to one end of the adjusting screw 703. The locking groove 705 is opened on the inner side of one end of the locking block 704. Several pins 701 are fixedly connected to one end of the connecting frame 2, and the pins 701 are evenly distributed at both ends of the connecting frame 2. The flue gas duct 1 has holes that match the pins 701. The locking block 704 is engaged at one edge of the flue gas duct 1, and the locking groove 705 is fitted onto one end of one of the pins 701.

[0026] It should be noted that the pins 701 are evenly distributed at both ends of the connecting frame 2, corresponding one-to-one with the matching holes on the flue gas duct 1. After insertion, the initial positioning of the connecting frame 2 and the flue gas duct 1 can be achieved instantly without repeated alignment of the installation position, greatly shortening the installation time. The threads at both ends of the double internal thread handle 702 are opposite (one end is a left-hand thread and the other end is a right-hand thread). When the handle is rotated, it can drive the two adjusting screws 703 to move synchronously in opposite directions, thereby driving the locking block 704 to clamp the edge of the flue gas duct 1. The operation can be completed manually without the need for complex tools such as wrenches. The slot 705 is fitted on one end of the pin 701. While the locking block 704 clamps the flue gas duct 1, it can also axially limit the pin 701, preventing the pin 701 from falling off due to vibration during equipment operation, and further improving the connection stability and sealing of the connecting frame 2 and the flue gas duct 1.

[0027] The workflow and principle of this invention are as follows: First, the connecting frame 2 is placed between two flue gas pipes 1, aligning the pins 701 at both ends of the connecting frame 2 with the preset holes on the flue gas pipes 1, and inserting the pins 701 to complete the initial positioning; then, the double internal thread handle 702 is manually rotated. Because the threads at both ends of the handle rotate in opposite directions, it drives the two adjusting screws 703 to move synchronously towards the edge of the flue gas pipes 1, causing the locking block 704 to clamp the outer wall of the flue gas pipes 1; at the same time, the locking groove 705 on the locking block 704 automatically fits onto one end of the pin 701, forming an axial limit on the pin 701 and preventing the pin 701 from vibrating and falling off; finally, a sealed and stable connection between the connecting frame 2 and the flue gas pipes 1 is achieved, laying the foundation for subsequent flue gas flow and detection. Then, in the non-collection state, the electric extension... When the telescopic rod 605 is in its initial retracted (or extended) state, the guide vanes 602, symmetrically arranged on both sides of the limiting plate 601, maintain a certain angle with the central axis of the flue gas duct 1, guiding the flue gas in the flue gas duct 1 to flow along the central axis, reducing direct contact between the flue gas and the surface of the filter screen 402, reducing the amount of dust adhering to the filter screen 402, and delaying clogging. When collection is required, the electric telescopic rod 605 initiates its telescopic action, driving the first connecting rod 603 connected to it to rotate around the axis of the guide vane 602; through the linkage of the second connecting rod 604, all guide vanes 602 synchronously adjust their angles (such as deflecting towards the filter screen 402), accurately guiding the flue gas to the filter screen 402, ensuring that the flue gas can efficiently pass through the filter screen 402 and enter the collection channel. The air pump 301 is started, and the first solenoid valve 303 is opened simultaneously. The air pump 301 generates negative pressure through the first collection tube 302. The negative pressure is transmitted to the connecting hood 305 through the second collection tube 304, and then distributed by the connecting hood 305 to multiple internal threaded interfaces 401 inside the connecting frame 2. At this time, the flue gas passes through the filter screen 402 under the action of negative pressure. The filtered clean flue gas enters the air pump 301 in sequence through the internal threaded interface 401, the connecting hood 305, the second collection tube 304, and the first collection tube 302. The air pump 301 delivers the collected clean flue gas to the main body 3 of the flue gas detection equipment, providing a sample free of impurities for subsequent component detection. When the filter screen 402 becomes slightly clogged after long-term use (such as increased collection pressure or decreased flow), it does not need to be disassembled. Remove filter screen 402 and directly start the backflushing cleaning function: depending on the blockage of each filter screen 402, open the corresponding second solenoid valve 504 individually or simultaneously; the high-pressure airflow (such as compressed air) in the main gas supply pipe 505 enters the connecting seat 502 through the second solenoid valve 504, and is then transported to the porous air pipe 503 through the connecting seat 502; the porous air pipe 503 sprays high-pressure airflow into the inside of the filter screen 402 through the evenly distributed air holes on its surface, and the airflow impacts the accumulated dust and impurities on the surface of the filter screen 402 in the opposite direction, blowing the impurities off from the outside of the filter screen 402 and discharging them with the flue gas flow out of the flue gas pipe 1; during the backflushing process, the filter screen 402 that has not been backflushed can still participate in flue gas filtration and collection normally without interrupting the overall detection process, ensuring the continuity of flue gas detection;At the same time, backflushing can effectively extend the service life of filter screen 402, reduce the maintenance costs and downtime caused by frequent replacement of filter screen 402, and then the filtered clean flue gas enters the main body 3 of the flue gas detection equipment. The built-in detection module of the equipment will detect carbon dioxide (CO2) and nitrogen oxides (NO) in the flue gas. x The system detects the concentration of harmful components such as sulfur oxides (SO2); the detection data is processed by the equipment and displayed in real time. Operators can use the data to determine whether the flue gas emissions meet national standards. If the emissions exceed the standards, the combustion parameters of the natural gas power plant will be adjusted in a timely manner to ensure that the emissions meet the standards.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A flue gas detection device for natural gas power plants, characterized in that, The device includes a main body (3) of flue gas detection equipment and a connecting frame (2) installed between two flue gas ducts (1). A filter collection component, a backflushing cleaning component, a flow guiding component, and a fixing component are provided between the main body (3) of the flue gas detection equipment and the connecting frame (2). The filter collection component is set inside and outside the connecting frame (2). The filter collection component includes several filter screens (402) installed inside the connecting frame (2) and a first collection tube (302) and a second collection tube (304). One end of the filter screen (402) is fixedly connected to a limit cap (405). Multiple filter screens (402) are connected by the first collection tube (302) and the second collection tube (304) to filter and collect flue gas and transport it to the main body (3) of the flue gas detection equipment for detection. The backflush cleaning assembly is located on one side of the connecting frame (2). The backflush cleaning assembly includes a connecting seat (502) installed at one end of the filter screen (402). A perforated air pipe (503) is installed at one end of the connecting seat (502). Air is circulated through the perforated air pipe (503) to backflush the filter screen (402) from the inside. The flow guiding component is located inside the connecting frame (2). The flow guiding component includes several limiting plates (601) and several air guide plates (602) symmetrically arranged relative to the limiting plates (601). The symmetrically arranged air guide plates (602) are used to guide the flue gas flowing inside the flue gas pipe (1) to prevent the flue gas from sticking to the surface of the filter screen (402). The fixing component is disposed between the flue gas duct (1) and the connecting frame (2). The fixing component includes several pins (701) to achieve quick positioning and fixing of the flue gas duct (1) and the connecting frame (2).

2. The flue gas detection device for natural gas power plants according to claim 1, characterized in that: The backflush cleaning assembly also includes a socket (501), a second solenoid valve (504), and a main air supply pipe (505). The socket (501) is located in the middle of the limiting cap (405). The second solenoid valve (504) is fixedly installed at one end of the connecting seat (502). The main air supply pipe (505) is located on one side of several connecting seats (502).

3. The flue gas detection device for natural gas power plants according to claim 1, characterized in that: The connector (502) and the socket (501) are connected by a thread. The porous air pipe (503) is connected to the output end of the second solenoid valve (504) through the connector (502). The connector (502) is connected to the main air pipe (505) through the setting of the second solenoid valve (504). The porous air pipe (503) has several air holes evenly distributed on its surface.

4. The flue gas detection device for natural gas power plants according to claim 1, characterized in that: The filter collection assembly also includes an air pump (301), a first solenoid valve (303), a connecting air hood (305), several internal threaded interfaces (401), an external threaded connector (403), and a mounting slot (404). The suction end of the air pump (301) is connected to one end of the first collection tube (302). The first solenoid valve (303) is fixedly installed at the other end of the first collection tube (302). The connecting air hood (305) is fixedly installed on one side of the connecting frame (2). The several internal threaded interfaces (401) are open. Located inside the connecting frame (2), the external threaded connector (403) is opened at one end of the filter screen (402), the mounting groove (404) is opened on one side of the connecting frame (2), the output end of the air pump (301) is connected to the detection end of the main body (3) of the flue gas detection equipment, the connecting air hood (305) is connected to several internal threaded interfaces (401), the external threaded connector (403) matches the internal threaded interface (401), and the shape of the mounting groove (404) matches the cross-sectional shape of the filter screen (402).

5. The flue gas detection device for natural gas power plants according to claim 1, characterized in that: One end of the first collection tube (302) is connected to one end of the second collection tube (304), and the filter screen (402) is fixedly installed inside the connecting frame (2) through the cooperation of the external threaded connector (403) and the internal threaded interface (401).

6. The flue gas detection device for natural gas power plants according to claim 1, characterized in that: The flow guiding assembly also includes a first connecting rod (603), a second connecting rod (604), and an electric telescopic rod (605). One end of the first connecting rod (603) is fixedly installed on one end of the rotating shaft of the air guide plate (602). The second connecting rod (604) is movably installed between one end of several first connecting rods (603), and the second connecting rod (604) and the first connecting rod (603) are rotatably connected. One end of the electric telescopic rod (605) is rotatably connected to one end of one of the first connecting rods (603), and the other end of the electric telescopic rod (605) is rotatably connected to the side wall of the connecting frame (2).

7. The flue gas detection device for natural gas power plants according to claim 1, characterized in that: Several limiting plates (601) are fixedly connected to the inside of the connecting frame (2), and the limiting plates (601) are located on one side of the filter screen (402). Two air guide plates (602) are symmetrically arranged on both sides of the limiting plates (601), and the air guide plates (602) are rotatably connected to the inside of the connecting frame (2).

8. The flue gas detection device for natural gas power plants according to claim 1, characterized in that: The fixing assembly also includes a double internal thread handle (702), two adjusting screws (703), a locking block (704), and a locking groove (705). The two adjusting screws (703) are respectively threaded to both ends of the double internal thread handle (702), the locking block (704) is fixedly connected to one end of the adjusting screw (703), and the locking groove (705) is opened on the inner side of one end of the locking block (704).

9. The flue gas detection device for a natural gas power plant according to claim 1, characterized in that: Several of the pins (701) are fixedly connected at one end to one end of the connecting frame (2), and the pins (701) are evenly distributed at both ends of the connecting frame (2). The flue gas pipe (1) has holes that match the pins (701).

10. A flue gas detection device for a natural gas power plant according to claim 8, characterized in that: The card block (704) is engaged at one end edge of the flue gas pipe (1), and the card slot (705) is sleeved on one end of one of the pins (701).

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