Blowback stable inspection device suitable for high-temperature and high-dust flue

Abstract

The invention discloses a blowback stable patrolling device suitable for a high-temperature and high-dust flue. The blowback stable patrolling device comprises a detection shell, a sensor shell and a blowback assembly. The detection shell is provided with a sleeve, one end of the sleeve is provided with an annular bottom plate, the other end is provided with a filter screen, and a smoke chamber is formed in the sleeve; the sensor shell is of a pipe body structure, one end of the sensor shell is connected with the bottom plate and communicated with the smoke cavity, a plurality of sensor elements are arranged in the sensor shell, and the shell is communicated with a smoke exhaust pipe externally connected with a suction pump. The back-blowing assembly comprises a back-blowing branch pipe and an external air source, the back-blowing branch pipe is communicated with the other end of the sensor shell, and a one-way valve is arranged at the joint of the back-blowing branch pipe and the sensor shell. Large-particle dust is preliminarily blocked through the filter screen, and clean airflow is regularly or timely introduced into the sensor shell and the flue gas chamber reversely through the back flushing assembly, so that accumulated dust attached to the surface of a sensor element and the filter screen is effectively removed, and the influence of the dust on the detection precision is remarkably reduced; and long-term stable operation and measurement accuracy of the sensor under severe working conditions are ensured.

Description

Technical Field

[0001] This invention relates to the field of surveying devices, specifically a backflushing stable surveying device suitable for high-temperature and high-dust flues. Background Technology

[0002] In industrial production processes, especially in industries such as metallurgy, power, building materials, and chemicals, high-temperature, high-dust-concentration flue gas is often generated, which needs to be discharged through flues. In order to achieve effective monitoring of flue gas emissions and environmental compliance management, it is necessary to conduct real-time and accurate monitoring of key parameters such as temperature, pressure, and gas composition within the flue.

[0003] However, when existing flue gas monitoring devices are applied to high-temperature and high-dust-concentration operating conditions, the large number of high-temperature dust particles carried in the flue gas are very easy to adhere to and accumulate at the sensor's detection end. This not only directly affects the sensor's detection sensitivity and response speed, but may also lead to sensor blockage and failure in the long run. Summary of the Invention

[0004] The purpose of this invention is to provide a backflushing stability monitoring device suitable for high-temperature and high-dust flues to solve the above-mentioned problems.

[0005] The technical solution of this invention is: A backflushing stability monitoring device suitable for high-temperature and high-dust flues, comprising: The detection housing includes: a sleeve, one end of which is provided with a base plate, the base plate having an annular structure, and a filter screen installed on the other end of the sleeve; the filter screen is a porous high-temperature resistant alloy filter screen, used to block large dust particles while allowing flue gas in the flue to pass smoothly; the internal space of the sleeve is called the flue gas chamber; The sensor housing is a tubular structure, with one end connected to the bottom plate on the side away from the flue gas chamber and communicating with the interior of the flue gas chamber; the sensor housing has multiple sensor elements built in, and multiple exhaust pipes are connected to the sensor housing, with the exhaust pipes connected to a suction pump. The sensor element inside the sensor housing is a high-temperature-adaptive multi-parameter detection element used to capture information such as flue gas temperature, pressure, and composition inside the flue gas chamber.

[0006] The backflush assembly includes: a backflush branch pipe, one end of which is connected to the other end of the sensor housing via a connecting assembly, and a one-way valve is configured at the connection point; and an external air source connected to the other end of the backflush branch pipe. The backflush assembly is used to remove dust adhering to the area around the sensor element and the filter screen, preventing blockage or sensitivity degradation at the sensor element's detection end.

[0007] Furthermore, it also includes a blockage-clearing component, which includes a mounting bracket, a rotating rod, and a first scraper. The mounting frame includes two turntables and a plurality of mounting rods disposed around the turntables. The turntables and the base plate are located on the same central axis, and the mounting rods located at opposite positions on the two turntables are connected by connecting rods. The two ends of the rotating rod are respectively connected to the center of the end face of the two turntables. The rotating rod is located on the axial central axis of the sleeve. A fan blade located in the airflow path of the flue is fixedly installed on the rotating rod. The fan blade is configured to drive the rotating rod to rotate by the airflow. The first scraper is fixed to the outside of the connecting rod, and the scraping surface of the first scraper is in contact with the inner wall of the flue gas chamber.

[0008] Furthermore, an annular groove is formed on the end face of the base plate, and a slider is provided on the side of the mounting rod. The slider slides in the annular groove so that the mounting bracket can rotate stably inside the sleeve.

[0009] Furthermore, a second scraper is provided on the mounting rod on the turntable near the filter screen, and the scraping surface of the second scraper is in contact with the filter screen.

[0010] Furthermore, at least three sensor elements are provided, and the multiple sensor elements are distributed at intervals along the axial direction of the flue gas chamber.

[0011] Furthermore, the scraping surface of the scraper is a hard, wear-resistant layer made of wear-resistant ceramic.

[0012] Furthermore, the suction pump is equipped with a control module that enables its intermediate end to operate.

[0013] Furthermore, the connection component includes: Connect the connecting pipe to one end of the backflush branch pipe; The mounting plate has a ring structure and is fixedly sleeved on the other end of the sensor housing. The outer circumference of the mounting plate is threaded. The first and second fixing rings both have internal threads on their inner ring surfaces and are threaded to the mounting plate. The first fixing ring is fixedly connected to the other end of the connecting pipe. The sealing ring, which is a graphite sealing ring, is fitted onto the mounting plate, and the inner ring surface of the sealing ring is tightly fitted to the outer surface of the mounting plate. The sealing ring is clamped between the first fixing ring and the second fixing ring.

[0014] Compared with the prior art, the beneficial effects of the present invention are: This invention arranges multiple sensor elements within a sensor housing and attaches a sleeve with a filter screen at the front end of the sensor housing to block large dust particles in the flue gas while allowing the flue gas to flow smoothly into the sleeve for detection by the sensor elements. This not only significantly reduces the impact of dust in the flue gas on the sensor elements and improves their detection accuracy, but also, by equipping the other end of the sensor housing with a backflushing assembly, the invention removes dust adhering to the area around the sensor elements and the filter screen, further preventing blockage or sensitivity attenuation at the sensor element's detection end, thus ensuring the accuracy of the sensor elements in detecting flue gas parameters.

[0015] Since the detection device is used in high-temperature, high-dust-concentration flue environments, the backflushing airflow generated by the backflushing component is prone to condensation due to its temperature being lower than that of the flue gas. This condensation forms a muddy mixture with the dust, clogging the pipeline. This invention addresses this by setting up a blockage-clearing component, which works in conjunction with the backflushing component. The first and second scrapers scrape the inner wall of the sleeve and the inner wall of the filter screen, respectively, and the backflushing airflow blows away the dirt scraped off. This prevents the condensed dust and dirt from remaining on the inner wall of the sleeve and the inner wall of the filter screen, thus preventing the flue gas from being obstructed by dirt when entering the flue gas chamber and thus hindering its natural flow within the sleeve. Attached Figure Description

[0016] Figure 1 This is an overall structural diagram of the present invention; Figure 2 This is a structural diagram of the unblocking component of the present invention; Figure 3 This is a structural diagram of the first fixing ring, sealing ring, and second fixing ring of the present invention.

[0017] The components are as follows: 1. Flue gas chamber; 2. Sleeve; 3. Filter screen; 4. Base plate; 5. Sensor housing; 6. Exhaust pipe; 7. Support rod; 8. Mounting plate; 9. First fixing ring; 10. Sealing ring; 11. Second fixing ring; 12. Connecting pipe port; 13. Backflush branch pipe; 14. Mounting bracket; 15. Rotating rod; 16. Fixed shaft; 17. Fan blade; 19. Scraper bar. Detailed Implementation

[0018] The following is combined Figures 1 to 3 The specific embodiments of the present invention will be described in detail below. In the description of the present invention, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and are not intended to 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 the present invention.

[0019] The terms "first" and "second" are used 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 as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0020] Example like Figure 1 As shown, a backflushing stability monitoring device suitable for high-temperature and high-dust flues can be installed at various locations and cross-sections of the pipeline for detection under high-temperature and high-dust conditions. It is used for parameter detection across the entire cross-section and at multiple locations of the flue. Simultaneously, a track can be set on the cross-section of the pipeline, and a movable seat with a drive module can be installed on the track. The movable seat moves along the track via the drive module, mounting the device on the movable seat to complete dynamic monitoring of the entire cross-section of the pipeline. The backflushing stability monitoring device includes: a detection housing, a sensor housing 5, and a backflushing assembly. The detection housing includes a sleeve 2. One end is provided with a base plate 4, which is a ring structure. The other end of the sleeve 2 is equipped with a filter screen 3, which is a porous high-temperature resistant alloy filter screen used to block large dust particles while allowing flue gas in the flue to pass smoothly. The internal space of the sleeve 2 is called the flue gas chamber 1. The sensor housing 5 is a tube structure, with one end connected to the side of the base plate 4 away from the flue gas chamber 1 and communicating with the inside of the flue gas chamber 1. The sensor housing 5 has multiple sensor elements built in it, and multiple exhaust pipes 6 are connected to the sensor housing 5. The exhaust pipes 6 are connected to a suction pump, and the suction pump is equipped with a one-way valve at the exhaust pipe 6. The sensor element inside the sensor housing 5 is a high-temperature adapted multi-parameter detection element, used to capture information such as flue gas temperature, pressure, and composition inside the flue gas chamber 1. The type of sensor can be selected according to the flue gas parameters that need to be monitored.

[0021] The backflush assembly includes a backflush branch pipe 13 and an external air source. One end of the backflush branch pipe 13 is connected to the other end of the sensor housing 5 through a connecting assembly, and a one-way valve is provided at the connection. The external air source is connected to the other end of the backflush branch pipe 13. The external air source can provide high-pressure airflow to remove dust adhering to the sensor element and the filter screen 3, so as to avoid blockage of the sensor element's detection end or sensitivity attenuation.

[0022] like Figure 2 As shown, it also includes a blockage-clearing component, which includes a mounting bracket 14, a rotating rod 15, and a first scraper 19; Mounting bracket 14 includes two turntables and multiple mounting rods arranged around the turntables. The turntables and the base plate 4 are located on the same central axis. The mounting rods located at opposite positions on the two turntables are connected by connecting rods. The two ends of the rotating rod 15 are respectively connected to the center of the end face of the two turntables. The rotating rod 15 is located on the axial central axis of the sleeve 2. The fan blade 17 located in the flue gas flow path is fixedly installed on the rotating rod 15. The fan blade 17 is configured to drive the rotating rod 15 to rotate by the air flow. The first scraper 19 is fixed to the outside of the connecting rod, and the scraping surface of the first scraper 19 is in contact with the inner wall of the flue gas chamber 1.

[0023] When the backflush assembly is activated, the high-pressure airflow enters the sensor housing 5 through the backflush branch pipe 13. Due to the one-way valve of the exhaust pipe 6, the high-pressure airflow blows over the sensor element and enters the sleeve 2, sweeping away dust and other contaminants on the filter screen 3. At the same time, it drives the fan blade assembly 16 fixedly connected to the rotating rod 15. The airflow drives the fan blade 17, causing the rotating rod 15 to rotate, thereby driving the entire mounting frame 14 to rotate. At this time, the first scraper 19 on the connecting rod begins to scrape the inner wall of the sleeve 2, causing dust and other contaminants to be scraped off and discharged from the sleeve 2 through the filter screen 3 with the high-pressure airflow.

[0024] In some embodiments, an annular groove (not shown in the figure) is formed on the end face of the base plate 4, and a slider (not shown in the figure) is provided on the side of the mounting rod. The slider slides in the annular groove so that the mounting bracket 14 rotates stably inside the sleeve 2.

[0025] In some embodiments, a second scraper is provided on the mounting rod on the turntable near the filter screen 3. The scraping surface of the second scraper contacts the filter screen 3 so that during the backflushing process, the inner side of the filter screen 3 can be scraped by the rotation of the mounting bracket 14. With the help of the high-pressure airflow, dirt and dust are prevented from clogging the inner side of the filter screen 3 during the backflushing process, thereby improving the backflushing cleaning effect.

[0026] In some embodiments, at least three sensor elements are provided, and the multiple sensor elements are distributed at intervals along the axial direction of the flue gas chamber 1. After the flue gas enters the sensor housing 5, it can be collected by the multiple sensor elements distributed at intervals along the axial direction to quickly obtain the flue gas parameters. Moreover, the multiple sensor elements are distributed at intervals along the axial direction of the flue gas chamber 1, so that during the backflushing process, the high-pressure airflow can evenly cover each sensor element to blow away the dust and dirt on each sensor.

[0027] To improve the service life of the scraper blade 19, the scraping surface of the scraper blade 19 is a hard wear-resistant layer made of wear-resistant ceramic.

[0028] The suction pump is equipped with a control module that enables it to operate. The flue gas enters the sleeve 2 from the flue, then enters the sensor housing 5 and stays there. The flue gas parameters are monitored by the sensor element. By controlling the suction frequency of the suction pump, the residence time of the flue gas inside the sensor housing 5 is controlled.

[0029] like Figure 3 As shown, to improve the sealing performance of the connection and the convenience of disassembly and maintenance, the connection assembly includes: a connecting port 12, a mounting plate 8, a first fixing ring 11 and a second fixing ring 9, and a sealing ring 10. The connecting port 12 is connected to one end of the backflush branch pipe 13. The mounting plate 8 is an annular structure and is fixedly sleeved on the other end of the sensor housing 5. Threads are opened on the outer periphery of the mounting plate 8. The inner annular surfaces of the first fixing ring 11 and the second fixing ring 9 are both threaded and threadedly connected to the mounting plate 8. The first fixing ring 11 is fixedly connected to the other end of the connecting port 12. The sealing ring 10 is a graphite sealing ring, sleeved on the mounting plate 8, and the inner annular surface of the sealing ring 10 is tightly fitted to the outer surface of the mounting plate 8. The sealing ring 10 is clamped between the first fixing ring 11 and the second fixing ring 9.

[0030] It is worth noting that the detection housing, sensor housing 5, connecting assembly, backflushing assembly, and unclogging assembly in this embodiment are all made of materials suitable for the high-temperature environment inside the boiler.

[0031] The above-disclosed embodiments are merely preferred embodiments of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A backflushing and stabilization monitoring device suitable for high-temperature and high-dust flues, characterized in that, include: The detection housing includes: a sleeve (2), one end of which is provided with a base plate (4), the base plate (4) is annular, and a filter screen (3) is installed on the other end of the sleeve (2); the internal space of the sleeve (2) is called the flue gas chamber (1). The sensor housing (5) is a tubular structure, with one end connected to the side of the base plate (4) away from the flue gas chamber (1) and communicating with the inside of the flue gas chamber (1); the sensor housing (5) has multiple sensor elements built in, and multiple exhaust pipes (6) are connected to the sensor housing (5), and the exhaust pipes (6) are connected to a suction pump. The backflush assembly includes: a backflush branch pipe (13), one end of which is connected to the other end of the sensor housing (5) via a connecting assembly, and a one-way valve is provided at the connection point; and an external air source connected to the other end of the backflush branch pipe (13).

2. The backflush stabilization monitoring device for high-temperature, high-dust flues according to claim 1, characterized in that, It also includes a blockage-clearing component, which includes a mounting bracket (14), a rotating rod (15), and a first scraper (19). The mounting bracket (14) includes: two turntables and a plurality of mounting rods disposed around the turntables. The turntables and the base plate (4) are located on the same central axis, and the mounting rods located at opposite positions on the two turntables are connected by connecting rods. The two ends of the rotating rod (15) are respectively connected to the center of the end face of the two turntables. The rotating rod (15) is located on the axial central axis of the sleeve (2). A fan blade (17) located in the flue airflow path is fixedly installed on the rotating rod (15). The fan blade (17) is configured to be driven by the airflow to drive the rotating rod (15) to rotate. The first scraper (19) is fixed to the outside of the connecting rod, and the scraping surface of the first scraper (19) is in contact with the inner wall of the flue gas chamber (1).

3. The backflush stabilization monitoring device for high-temperature, high-dust flues according to claim 2, characterized in that, An annular groove is provided on the end face of the base plate (4), and a slider is provided on the side of the mounting rod, which slides in the annular groove.

4. The backflush stabilization monitoring device for high-temperature, high-dust flues according to claim 2, characterized in that, A second scraper is provided on the mounting rod on the turntable near the filter screen (3), and the scraping surface of the second scraper is in contact with the filter screen (3).

5. The backflush stabilization monitoring device for high-temperature, high-dust flues according to claim 1, characterized in that, The sensor element is provided in at least three parts, and the multiple sensor elements are distributed at intervals along the axial direction of the flue gas chamber (1).

6. The backflush stabilization monitoring device for high-temperature, high-dust flues according to claim 2, characterized in that, The scraping surface of the scraper (19) is a hard wear-resistant layer made of wear-resistant ceramic.

7. The backflushing stability monitoring device for high-temperature, high-dust flues according to claim 1, characterized in that, The suction pump is equipped with a control module that enables its intermediate end to operate.

8. The backflush stabilization monitoring device for high-temperature, high-dust flues according to claim 1, characterized in that, The connection component includes: Connect the connecting pipe (12) to one end of the backflush branch pipe (13); Mounting disc (8), annular structure, is fixedly sleeved on the other end of the sensor housing (5), and the outer periphery of the mounting disc (8) is threaded; The first fixing ring (11) and the second fixing ring (9) both have internal threads on their inner ring surfaces and are threaded to the mounting plate (8). The other end of the first fixing ring (11) is fixedly connected to the connecting pipe (12). A sealing ring (10) is fitted on the mounting plate (8), and the inner ring surface of the sealing ring (10) is tightly fitted with the outer side surface of the mounting plate (8). The sealing ring (10) is clamped between the first fixing ring (11) and the second fixing ring (9).

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