Boiler fly ash sampling and capture device

Abstract

The present invention relates to the technical field of fly ash sampling, in particular to a fly ash sampling and capturing device for boilers, which includes an ash discharge pipe with a sampling pipe inside. The sampling pipe is used to collect samples from the fly ash flowing through the ash discharge pipe; a collection component, including a first pipe body arranged inside the sampling pipe, and a second pipe body is further arranged inside the first pipe body to form a multi-stage structure; independent collection cavities are reserved between the sampling pipe, the first pipe body and the second pipe body respectively for separating and collecting fly ash particles of different particle sizes; a plurality of holes are horizontally opened on the sampling pipe, and at the positions corresponding to these holes, the first pipe body and the second pipe body are fixed with filtering elements for screening fly ash particles within a specific particle size range. A driving component is arranged outside the ash discharge pipe. Through the design of the sampling pipe and the sleeve, the present invention allows the sampling pipe to rotate relative to the ash discharge pipe to adjust to a sealed state, preventing unfiltered fly ash from entering the collection, thus ensuring the purity and representativeness of the sample.

Description

Technical Field

[0001] The present invention relates to the field of fly ash sampling, in particular to a fly ash sampling and capturing device for boilers. Background Art

[0002] The fly ash sampling technology for boilers involves the collection of suspended particulate matter (i.e., fly ash) in the exhaust gas generated after the combustion of coal-fired boilers for subsequent analysis. By analyzing these samples, the proportion of combustible components that are not completely burned in the fly ash can be determined, and this data is of great significance for evaluating the coal powder combustion efficiency and optimizing the boiler operation parameters.

[0003] However, most of the current fly ash sampling devices on the market rely on semi-automatic or manual operation modes. This means that when performing the sampling task, technicians must personally place the sampling device into the flue for on-site sampling work. This method not only consumes a large amount of time and human resources, but also when encountering complex layouts or pipes with non-standard shapes, the sampling difficulty will increase significantly, making the operation extremely inconvenient. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is that when performing the sampling task, technicians must personally place the sampling device into the flue for on-site sampling work.

[0005] The above technical problem is solved by the following technical solutions: The present invention provides a fly ash sampling and capturing device for boilers, which includes an ash discharge pipe with a sampling pipe inside. The sampling pipe is used to collect samples from the fly ash flowing through the ash discharge pipe; a collection component, including a first pipe body arranged inside the sampling pipe, and a second pipe body is further arranged inside the first pipe body, forming a multi-stage structure; independent collection cavities are reserved between the sampling pipe, the first pipe body and the second pipe body respectively for separating and collecting fly ash particles of different particle sizes; a plurality of holes are horizontally opened on the sampling pipe, and at the positions corresponding to these holes, filter elements are fixed on the first pipe body and the second pipe body to screen fly ash particles within a specific particle size range. A driving component is arranged outside the ash discharge pipe; the sampling pipe is driven by the driving component, and when the sampling pipe rotates to a preset angle, it can ensure that the inside of the sampling pipe maintains a sealed state; an air pump component is connected to the driving component and is used to suck the fly ash in the collection component.

[0006] In a preferred embodiment of the fly ash sampling and capturing device for boilers of the present invention: The filter element includes a first filter element with a first filter hole having a predetermined first average diameter; a second filter element with a second filter hole having a predetermined second average diameter. The first average diameter of the first filter hole is larger than the second average diameter of the second filter hole to ensure that larger particulate matter is intercepted by the first filter element, while smaller particulate matter is further filtered by the second filter element.

[0007] In a preferred embodiment of the boiler fly ash sampling and capturing device of the present invention: The first filter element is located before the second filter element, such that the fluid first passes through the first filter element and then through the second filter element.

[0008] In a preferred embodiment of the boiler fly ash sampling and capturing device of the present invention: The first filter element and the second filter element are made of a metal mesh, a ceramic membrane, or polymer fibers.

[0009] In a preferred embodiment of the boiler fly ash sampling and capturing device of the present invention: One end of the sampling tube is configured with a sleeve; the sleeve, one end of which is connected to one end of the sampling tube, and the other end is fixed to the ash discharge pipe by a bolt connection method.

[0010] In a preferred embodiment of the boiler fly ash sampling and capturing device of the present invention: The collection assembly further includes a cleaning tube, which is respectively fixed to the inner walls of the sampling tube and the first tube body and is correspondingly arranged with the holes. Among them, when the sampling tube rotates, it can scrape the fly ash on the filter element; a groove part is arranged on the surfaces of the first tube body and the second tube body. When the cleaning tube fits with the groove part, there will be a gap, and the gap is used to discharge and collect the scraped fly ash.

[0011] In a preferred embodiment of the boiler fly ash sampling and capturing device of the present invention: The driving assembly includes a housing, which is fixedly connected to the sleeve; a motor, which is installed on the outer surface of the housing; a gear, which is fixed to the output end of the motor; a tooth groove is arranged on the outer side of the sampling tube, and the tooth groove forms a meshing structure with the gear to realize driving the movement of the sampling tube by the rotation of the motor.

[0012] In a preferred embodiment of the boiler fly ash sampling and capturing device of the present invention: A plurality of driving blocks are fixed to the inner wall of the sampling tube, which are used to provide a driving force when the sampling tube rotates to a preset angle; a first support sliding rod is arranged between the first tube body and the sampling tube. One end of the first support sliding rod is fixedly connected to the first tube body, and the other end is pushed by the driving block to cause the first tube body to rotate to the preset angle accordingly.

[0013] In a preferred embodiment of the boiler fly ash sampling and capturing device of the present invention: A torsion spring is arranged between the first tube body and the sampling tube to provide a restoring torque for the first tube body, and a second support sliding rod is arranged between the first tube body and the second tube body.

[0014] In a preferred embodiment of the boiler fly ash sampling and capturing device of the present invention: A blocking assembly is arranged inside the sampling tube. The blocking assembly includes an annular blocking block, which is rotatably installed inside the sampling tube and selectively covers or exposes the holes according to the rotation angle of the sampling tube; a counterweight block, which is connected to the bottom of the annular blocking block.

[0015] The beneficial effects of the present invention are as follows: The design of the sampling tube and the sleeve allows the sampling tube to rotate relative to the ash discharge pipe to adjust to a sealed state. This prevents unfiltered fly ash from entering the collection, thus ensuring the purity and representativeness of the sample.

[0016] By adopting a multi-stage filtering device composed of a first filter element and a second filter element, effective separation of fly ash particles with different particle sizes is achieved. This hierarchical filtering method not only improves the sampling accuracy but also extends the service life of the filter element.

[0017] The plugging component allows the opening or closing of the hole to be automatically adjusted according to the angle change of the sampling tube. For application scenarios that require flexible control of the sampling time, it can adapt to different sampling requirements, such as short-term rapid sampling or long-term continuous sampling.

[0018] The cleaning tube and the groove part can scrape off the fly ash adhering to the filter element during the sampling process and guide it to the collection chamber. This function helps to maintain the performance of the filter element. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below only relate to some embodiments of the present invention and do not limit the present invention.

[0020] Figure 1 Shows a three-dimensional view of the sampling tube of the boiler fly ash sampling and capturing device;

[0021] Figure 2 Shows a schematic top view of fly ash flow of the sampling tube of the boiler fly ash sampling and capturing device;

[0022] Figure 3 Shows a three-dimensional view of the tooth groove of the boiler fly ash sampling and capturing device;

[0023] Figure 4 Shows a schematic view of the collection chamber of the boiler fly ash sampling and capturing device;

[0024] Figure 5 Shows a schematic plan view of the rotation of the sampling tube of the boiler fly ash sampling and capturing device.

[0025] Figure 6 Shows a three-dimensional view of the rotation of the sampling tube of the boiler fly ash sampling and capturing device.

[0026] Figure 7 Shows a three-dimensional view of the annular plugging block of the boiler fly ash sampling and capturing device. DETAILED DESCRIPTION OF THE INVENTION

[0027] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below in conjunction with specific embodiments and the accompanying drawings.

[0028] The terms used in the present invention are those general terms currently widely used in the art in consideration of the functions of the present invention. However, these terms may vary according to the intentions of those of ordinary skill in the art, precedents, or new technologies in the art. In addition, specific terms may be selected by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the present invention. Therefore, the terms used in the specification should not be understood as simple names, but based on the meanings of the terms and the overall description of the present invention.

[0029] Referring to Figures 1-3 , this embodiment provides a boiler fly ash sampling and capturing device, including an ash discharge pipe 1, inside which there is a sampling pipe 11 for collecting samples from the fly ash flowing through the ash discharge pipe 1; a collection assembly 2, including a first pipe body 21 disposed inside the sampling pipe 11, and a second pipe body 22 is further disposed inside the first pipe body 21 to form a multi-stage structure; independent collection chambers 3 are reserved between the sampling pipe 11, the first pipe body 21 and the second pipe body 22 for separating and collecting fly ash particles of different particle sizes; a plurality of holes 111 are horizontally opened on the sampling pipe 11, and at the positions corresponding to these holes 111, filter elements 23 are fixed on the first pipe body 21 and the second pipe body 22 to screen fly ash particles within a specific particle size range. A driving assembly 4 is disposed outside the ash discharge pipe 1; the sampling pipe 11 is driven by the driving assembly 4, and when the sampling pipe 11 rotates to a preset angle, it can ensure that the inside of the sampling pipe 11 maintains a sealed state; an air pump assembly 5 is connected to the driving assembly 4 for sucking the fly ash in the collection assembly 2.

[0030] In this embodiment, in modern industrial production, especially in industries involving combustion processes, such as thermal power generation, metallurgy, and chemical engineering, boilers are crucial equipment. To ensure the safe operation of boilers and meet environmental protection requirements, it is necessary to monitor and control the particulate matter in the exhaust gas discharged from boilers. Among them, the characteristic analysis of fly ash (i.e., fine solid particles separated from boiler flue gas) is crucial for evaluating boiler performance, pollutant emissions, and taking corresponding treatment measures.

[0031] This device can not only collect fly ash particles of different particle sizes, but also ensure the integrity of the samples during the sampling process, thus providing a reliable data basis for subsequent laboratory analysis.

[0032] The ash discharge pipe 1 is a channel connecting the boiler to the external environment or treatment system, and a sampling pipe 11 is disposed inside it as the main working area for fly ash sampling.

[0033] The sampling tube 11 is located inside the ash discharge pipe 1 and is specifically used to extract samples from the flowing fly ash stream. A plurality of holes 111 are horizontally opened on the sampling tube 11, and these holes 111 are the inlets for the fly ash to enter the sampling tube 11.

[0034] The first tube body 21: It is installed inside the sampling tube 11 and further embedded with the second tube body 22 to form a multi-stage structure. Such a design allows fly ash particles of different sizes to be separated.

[0035] The second tube body 22: It is arranged inside the first tube body 21 and acts together with the first tube body 21 to achieve multi-stage filtration.

[0036] Independent collection chambers 3 are reserved between the sampling tube 11, the first tube body 21 and the second tube body 22 respectively, for classifying and collecting fly ash particles of different particle sizes screened out by the filter element 23.

[0037] At the corresponding positions of the holes 111 on the sampling tube 11, the first tube body 21 and the second tube body 22 are fixed with filter elements 23. These filter elements 23 select fly ash particles within a specific particle size range according to the set parameters, ensuring that each collection chamber 3 only contains particles meeting the standards.

[0038] The drive assembly 4 is arranged outside the ash discharge pipe 1 and is responsible for driving the sampling tube 11 to rotate. When the sampling tube 11 rotates to a preset angle, it will automatically adjust to a sealed state to prevent fly ash not within the preset collection standard from mixing into the already collected samples later, maintaining the purity of the sampling process.

[0039] The air pump assembly 5 is connected above the drive assembly 4 and is mainly responsible for creating a negative pressure environment, thereby effectively sucking the fly ash samples that have been collected in the collection assembly 2. Specifically, when the sampling tube 11 is in a sealed state, after the air pump starts, the air pressure inside the sampling tube 11 will be reduced, forming a negative pressure difference relative to the external atmospheric pressure. This negative pressure difference enables the fly ash samples in the collection assembly 2 to be smoothly extracted and move along a pre-set path to a designated position, such as a temporary storage container or directly into a transport container for subsequent processing.

[0040] To ensure the efficiency and accuracy of sample transmission, the air pump assembly 5 is also equipped with a plurality of air pipes. These air pipes are fixedly installed on the housing 41, and each air pipe is directly connected to the corresponding collection chamber 3. Such a layout of multiple air pipes also helps to prevent cross-contamination between fly ash samples from different sources, ensuring the purity of the samples.

[0041] The collection effect can also be further improved by adding a so-called "blowing pipe" to the sampling tube 11. The function of the "blowing pipe" is to inject a slight air current into the sampling tube 11 during the suction process of the air pump. This air current can help loosen the fine fly ash particles adhering to the pipe wall, making them easier to be carried away by the air current, thereby improving the collection efficiency. At the same time, the use of the "blowing pipe" can also reduce the risk of blockage caused by fly ash deposition.

[0042] Working principle: When the fly ash passes through the ash discharge pipe 1 along with the air current, part of the fly ash will enter the sampling tube 11 through the holes 111 on the sampling tube 11 and be filtered successively through the first tube body 21 and the second tube body 22. During this process, fly ash particles of different particle sizes will be deposited in different collection chambers 3 due to the influence of factors such as inertia and gravity. At the same time, the driving assembly 4 operates according to a predetermined program, enabling the sampling tube 11 to maintain a sealed state within an appropriate time period to avoid cross-contamination. Finally, the air pump assembly 5 is started to evacuate the fly ash samples in each collection chamber 3 one by one, completing the entire sampling process.

[0043] This boiler fly ash sampling and capturing device has the following advantages: The multi-stage structure of the filter element 23 ensures the effective separation of fly ash of different particle sizes and improves the accuracy of sampling. The sealed design and the air pump assembly 5 reduce the influence of external factors on the sample and ensure the reliability of the sample. It has a high degree of automation, simplifies the sampling process, reduces the need for manual intervention, and improves work efficiency.

[0044] In addition, this device allows the operator to easily switch the working mode according to different requirements (such as short-term rapid sampling or long-term continuous sampling). For long-term continuous sampling, a controller for timed opening / closing can be added inside the sampling assembly to control the operation of the driving assembly 4, and the holes 111 are automatically opened or closed at preset time intervals to ensure that the fly ash samples obtained in each preset time period do not mix with each other.

[0045] Reference Figure 6 , in an embodiment provided by the present application, the filter element 23 includes a first filter element having a first filter hole with a predetermined first average diameter; a second filter element having a second filter hole with a predetermined second average diameter. The first average diameter of the first filter hole is greater than the second average diameter of the second filter hole to ensure that larger particulate matter is intercepted by the first filter element, while smaller particulate matter is further filtered by the second filter element. The first filter element is located before the second filter element, so that the fluid first passes through the first filter element and then through the second filter element. The first filter element and the second filter element are made of metal mesh, ceramic membrane or polymer fiber.

[0046] In this embodiment, the described filter element 23 is a multi-stage filtering device composed of two different filter elements. That is, by setting filter layers with different pore sizes, impurities in the fluid are removed sequentially. Specifically, the first filter element has first filter holes with a relatively large average diameter for intercepting particulate matter of larger sizes; while the second filter element has second filter holes with a relatively small average diameter for capturing small particulate matter that has passed through the first filter element. Such a double-layer filtering structure ensures that the fluid can be effectively purified, while reducing the burden on a single filter element and extending the service life of the entire filter element 23.

[0047] When the fluid containing particulate matter enters this filter element 23, it first comes into contact with the first filter element. Since the filter holes of the first filter element are relatively large, it can effectively block all particles larger than its average diameter, allowing the smaller particles to continue flowing with the fluid. Next, the fluid after preliminary filtration flows towards the second filter element. At this time, because the filter holes of the second filter element are smaller, it can further remove the remaining small particulate matter, ensuring that the finally flowing out fluid is as pure as possible. This gradually decreasing filtering method not only improves the filtering efficiency, but also enables each filter element to focus on processing particles within a specific particle size range, thereby optimizing the entire filtering process.

[0048] Reference Figures 3-5 Referring to

[0049] In this embodiment, the sleeve 1111, as a component connecting the sampling tube 11 and the ash discharge pipe 1, plays a bridging role. One end of the sleeve 1111 is fixedly connected to the sampling tube 11, and the other end is fixed to the ash discharge pipe 1 by means of bolt connection. The bolt connection ensures the reliability of the connection and is also convenient for disassembly and maintenance.

[0050] The sealed bearing is located inside the sampling tube 11 and is connected to the sleeve 1111. Its main function is to allow the sampling tube 11 to rotate relative to the sleeve 1111 on the premise of ensuring airtightness.

[0051] The driving component 4 is responsible for providing the power for the rotation of the sampling tube 11, and mainly includes a housing 41, a motor 42 and a gear. Among them, the housing 41 serves as a carrier for the motor 42 and other related components, and is fixedly connected to the sleeve 1111; the motor 42 is installed on the outer surface of the housing 41, and transmits power to the tooth groove 43 on the sampling tube 11 through gear transmission, so as to realize the rotation of the sampling tube 11.

[0052] When the motor 42 starts, the gear on its output shaft starts to rotate, and drives the sampling tube 11 to rotate together through the meshing action with the outer tooth groove 43 of the sampling tube 11.

[0053] Reference Figure 5 and Figure 6 In some embodiments, a plurality of driving blocks 44 are fixed on the inner wall of the sampling tube 11 for providing a driving force when the sampling tube 11 rotates to a preset angle; a first support slide bar 6 is provided between the first tube body 21 and the sampling tube 11. One end of the first support slide bar 6 is fixedly connected to the first tube body 21, and the other end is pushed by the driving block 44 to drive the first tube body 21 to rotate to the preset angle. A torsion spring is provided between the first tube body 21 and the sampling tube 11 to provide a restoring torque for the first tube body 21, and a second support slide bar 7 is provided between the first tube body 21 and the second tube body 22.

[0054] In this embodiment, a plurality of driving blocks 44 are installed on the inner wall of the sampling tube 11. The positions and numbers of these driving blocks 44 are determined according to specific application requirements, and their main function is to provide an additional driving force when the sampling tube 11 rotates to a preset angle.

[0055] The first tube body 21 is connected to the sampling tube 11, but their movements are not completely synchronized. Under normal circumstances, the first tube body 21 remains stationary. In order to realize the independent rotation of the sampling tube 11, there must be a certain connection mechanism between them, that is, the first support slide bar 6.

[0056] One end of the first support slide bar 6 is fixedly connected to the first tube body 21, and the other end is directly affected by the driving block 44 in the sampling tube 11. When the driving block 44 in the sampling tube 11 is triggered because the sampling tube 11 rotates to a preset angle, it will push the first support slide bar 6, and then drive the first tube body 21 to rotate to the predetermined position together.

[0057] In order to enable the first tube body 21 to return to the initial position smoothly, a torsion spring is added between the first tube body 21 and the sampling tube 11. When the first tube body 21 rotates due to the action of the driving block 44, the torsion spring will be stretched or compressed to store energy. Once the external force disappears, for example, after the sampling is completed, the torsion spring releases the stored energy and applies a reverse torque to the first tube body 21 to prompt it to return to its original state.

[0058] The first support slide bar 6 and the second support slide bar 7 are used to maintain the relative position between the two pipe bodies.

[0059] Working principle: As the sampling pipe 11 gradually rotates, when it reaches a preset angle, such as 90°, the driving block 44 on the inner wall of the sampling pipe 11 will touch the first support slide bar 6. At this time, due to the contact force between the driving block 44 and the support slide bar, the support slide bar begins to receive a driving force from the driving block 44. This force is sufficient to overcome the existing frictional force and other resistances, enabling the first support slide bar 6 to smoothly push the first pipe body 21 to rotate together, automatically adjust to the sealed state, prevent fly ash not meeting the preset collection standard from mixing into the already collected sample, and maintain the purity of the sampling process.

[0060] Reference Figure 5 and Figure 6 In an embodiment provided by the present application, the collection component 2 further includes a cleaning pipe 24, which is respectively fixed on the inner walls of the sampling pipe 11 and the first pipe body 21 and is arranged corresponding to the hole 111. When the sampling pipe 11 rotates, it can scrape off the fly ash on the filter element 23; a groove part 25 is arranged on the surfaces of the first pipe body 21 and the second pipe body 22. When the cleaning pipe 24 fits with the groove part 25, there will be a gap, and the gap is used to discharge and collect the scraped fly ash.

[0061] In this embodiment, the cleaning pipe 24 is installed on the inner walls of the sampling pipe 11 and the first pipe body 21, corresponding to the position of the hole 111. When the sampling pipe 11 rotates, the cleaning pipe 24 rotates accordingly, and its edge can contact the surface of the filter element 23, thereby realizing the scraping effect on the fly ash.

[0062] The groove part 25 is arranged on the outer surfaces of the first pipe body 21 and the second pipe body 22. Its main function is to form a gap when the cleaning pipe 24 fits with it. It can ensure that the collected fly ash smoothly discharges through the gap and enters the prepared collection cavity 3.

[0063] Working principle: When the entire collection component 2 starts to operate, the sampling pipe 11 rotates at a predetermined speed and direction. As the sampling pipe 11 rotates, the cleaning pipe 24 fixed inside it also starts to move and slides along the surface of the filter element 23. At this time, the edge of the cleaning pipe 24 is like a brush, gradually removing the fly ash adhered to the filter element 23. Due to the gap between the cleaning pipe 24 and the groove part 25, these scraped fly ashes can smoothly flow into the gap and finally be guided into the lower collection cavity 3.

[0064] It should be noted that a plurality of sealing layers are fixed on the surfaces of the first pipe body 21 and the second pipe body 22. When the cleaning pipe 24 is in the initial position or rotates to the preset position, it will abut against the sealing layer to improve the sealing performance.

[0065] Reference Figure 7 , as an alternative embodiment, a plugging assembly 8 is disposed inside the sampling tube 11. The plugging assembly 8 includes an annular plugging block 81 rotatably mounted inside the sampling tube 11 and selectively covering or exposing the hole 111 according to the rotation angle of the sampling tube 11; and a counterweight 82 connected to the bottom of the annular plugging block 81.

[0066] In this embodiment, the annular plugging block 81 is mounted inside the sampling tube 11 and can rotate around a certain axis. The annular plugging block 81 is configured to selectively cover or expose the hole 111 on the sampling tube 11 according to the angle change of the sampling tube 11. This means that when the sampling tube 11 is in a preset position, the hole 111 is open for sampling; while when the sampling tube 11 is tilted to a certain angle, the annular plugging block 81 will automatically close the hole 111 to prevent sample contamination.

[0067] The counterweight 82 is connected to one end of the annular plugging block 81. The main function of the counterweight 82 is to maintain the balance of the annular plugging block 81 under the action of gravity when the sampling tube 11 is tilted, so that the sampling tube 11 can automatically correspond to the plugging area or sampling area on the annular plugging block 81 when rotating. This enables the plugging assembly 8 to automatically respond to the attitude change of the sampling tube 11 without an external power source.

[0068] Finally, it should be noted that the methods and devices described in detail above are only embodiments, and those skilled in the art can modify these embodiments in different ways as long as they do not depart from the scope of the present invention.

Claims

1. Boiler fly ash sampling and capturing device, characterized by: include, An ash discharge pipe (1) is provided with a sampling pipe (11) inside; A collection assembly (2) comprises a first tube body (21) arranged inside a sampling tube (11), wherein a second tube body (22) is arranged inside the first tube body (21); An independent collection chamber (3) is provided between the sampling tube (11), the first tube body (21) and the second tube body (22); A plurality of holes (111) are horizontally opened on the sampling tube (11), and filters (23) are fixed to the first tube body (21) and the second tube body (22) at positions corresponding to the holes (111); A driving assembly (4) is arranged outside the ash discharge pipe (1); The sampling tube (11) is driven by a driving assembly (4). When the sampling tube (11) rotates to a preset angle, the hole (111) is closed, so that the interior of the sampling tube (11) remains sealed. An air pump assembly (5) connected to the driving assembly (4) and used for sucking fly ash from the collecting assembly (2); The filter element (23) comprises: A first filter element, mounted on the first tube (21), having a first filter hole, wherein the first filter hole has a predetermined first average diameter; A second filter element, mounted on the second tube (22), having a second filter hole, wherein the second filter hole has a predetermined second average diameter; The first average diameter of the first filter pores is greater than the second average diameter of the second filter pores; The acquisition component (2) further comprises: A cleaning tube (24) is fixed to the inner wall of the sampling tube (11) and the first tube body (21), respectively, and is arranged corresponding to the hole (111), wherein when the sampling tube (11) rotates, the fly ash on the filter element (23) can be scraped off; The groove portion (25) is arranged on the surface of the first tube body (21) and the second tube body (22). When the cleaning tube (24) is fitted with the groove portion (25), a gap is left, and the gap is used to discharge and collect the scraped fly ash.

2. The boiler fly ash sampling and capturing device according to claim 1, characterized in that: The first filter element is located outside the second filter element, so that the fluid first passes through the first filter element and then passes through the second filter element.

3. The boiler fly ash sampling and capturing device according to claim 2, characterized in that: The first filter element and the second filter element are made of metal mesh, ceramic membrane or polymer fiber.

4. The boiler fly ash sampling and capturing device according to claim 3 is characterized in that: A sleeve (1111) is disposed at one end of the sampling tube (11); The sleeve (1111) has one end connected to one end of the sampling tube (11), and the other end fixed to the ash discharge pipe (1) by means of bolt connection.

5. The boiler fly ash sampling and capturing device according to claim 1, characterized in that: The driving assembly (4) comprises: A housing (41), the housing (41) being fixedly connected to the sleeve (1111); A motor (42) mounted on the outer surface of the housing (41); A gear fixed to the output end of the motor (42); A tooth groove (43) is provided on the outside of the sampling tube (11), and the tooth groove (43) forms a meshing structure with the gear, so as to realize driving the sampling tube (11) to move by rotating the motor (42).

6. The boiler fly ash sampling and capturing device according to claim 5, characterized in that: A plurality of driving blocks (44) are fixed to the inner wall of the sampling tube (11) and are used to provide a driving force when the sampling tube (11) rotates to a preset angle; A first supporting slide bar (6) is provided between the first tube body (21) and the sampling tube (11); one end of the first supporting slide bar (6) is fixedly connected to the first tube body (21), and the other end is pushed by a driving block (44) so ​​that the first tube body (21) rotates to a preset angle.

7. The boiler fly ash sampling and capturing device according to claim 6, characterized in that: A torsion spring is arranged between the first tube body (21) and the sampling tube (11) to provide a restoring torque for the first tube body (21), and a second supporting sliding rod (7) is arranged between the first tube body (21) and the second tube body (22).

8. The boiler fly ash sampling and capturing device according to claim 7, characterized in that: A plugging assembly (8) is arranged inside the sampling tube (11), and the plugging assembly (8) comprises: An annular blocking block (81) is rotatably mounted inside the sampling tube (11) and selectively covers or exposes the hole (111) according to the rotation angle of the sampling tube (11); The counterweight block (82) is connected to the bottom of the annular sealing block (81).

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