Sampling port device, flue gas sampling device and waste heat boiler

Abstract

The present disclosure relates to a sampling port device, a flue gas sampling device and a waste heat boiler. The sampling port device comprises a sampling port body, the sampling port body comprises an outer cylinder and an inner cylinder located inside the outer cylinder, an air supply channel is formed between the inner side wall of the outer cylinder and the outer side wall of the inner cylinder, the outer side wall of the outer cylinder is provided with a connecting portion for connecting to the waste heat boiler, a first exhaust port connected to the air supply channel is formed at the inner end, a first air inlet connected to the air supply channel is also provided on the outer side wall of the outer cylinder, and the first air inlet is located outside the connecting portion, so as to supply external cooling gas to enter the air supply channel and guide it to the inside of the waste heat boiler, a sampling channel for supplying the flue gas sampling device to enter and exit the waste heat boiler is formed inside the inner cylinder, so as to solve the problem in the related technology that flue gas leakage is easy to occur when the flue gas flow field is tested, thereby causing certain safety hazards, effectively ensure the personal safety of the operator when taking flue gas samples, and has the advantages of simple structure and good operability.

Description

Technical Field

[0001] The present disclosure relates to the technical field of flue gas flow field testing, and in particular to a sampling port device, a flue gas sampling device and a waste heat boiler. Background Art

[0002] As the country's requirements for environmental protection become increasingly stringent, flue gas composition measurement can analyze the pollutant components in the flue gas in the boiler, thereby effectively optimizing the combustion in the boiler to achieve energy conservation and emission reduction. In related technologies, when testing the flue gas flow field of high-pressure flue gas inside the waste heat boiler, there is a risk of high-pressure flue gas leakage, which has poor applicability and certain safety hazards. Summary of the invention

[0003] In order to solve the above technical problems, the purpose of the present invention is to provide a sampling port device, a flue gas sampling device and a waste heat boiler. The sampling port device can solve the problem that flue gas leakage is prone to occur during flue gas flow field testing in related technologies, thereby causing certain safety hazards.

[0004] In order to achieve the above-mentioned purpose, the present disclosure provides a sampling port device for a waste heat boiler, including a sampling port body, the sampling port body including an outer cylinder and an inner cylinder located inside the outer cylinder, an air supply channel is formed between the inner side wall of the outer cylinder and the outer side wall of the inner cylinder, the outer side wall of the outer cylinder is provided with a connecting portion for connecting to the waste heat boiler, and a first exhaust port connected to the air supply channel is formed at the inner end, a first air inlet connected to the air supply channel is also provided on the outer side wall of the outer cylinder, and the first air inlet is located on the outside of the connecting portion, so as to allow external cooling gas to enter the air supply channel and be guided to the interior of the waste heat boiler, and a sampling channel for a flue gas sampling device to enter and exit the waste heat boiler is formed inside the inner cylinder.

[0005] Optionally, the outer cylinder is arranged coaxially with the inner cylinder, and the outer ends are fixed by a first flange, the center hole on the first flange forms a sampling channel inlet for the flue gas sampling device to enter and exit, the sampling channel inlet is connected to the sampling channel, and the flange fastening hole of the first flange is used to detachably fix the flue gas sampling device.

[0006] Optionally, the inner tube is a straight tube structure, the outer tube has a straight tube section and a tapered section, and the tapered section gradually tapers from the straight tube section toward the inner end of the inner tube to form the first exhaust port with the inner end of the inner tube.

[0007] Optionally, a sealing plate is further included, which is detachably connected to the first flange to be used for operably opening or closing the inlet of the sampling channel.

[0008] The second aspect of the present disclosure also provides a flue gas sampling device for a waste heat boiler, the flue gas sampling device comprising: a telescopic body, the telescopic body is used to detachably penetrate the sampling port device as described above, including a plurality of telescopic sections that are slidably connected in sequence, and the outer side wall of at least one telescopic section in the telescopic body is designed to fit tightly against the inner side wall of the sampling channel; and a sampling tube, the inner end of the sampling tube extends to the interior of the telescopic body to form a second air inlet, and the outer end is located outside the outer end of the telescopic body to form a second exhaust port, wherein the sampling tube is also connected to the innermost telescopic section of the telescopic body so as to be able to drive the telescopic movement of the telescopic body by operating the outer end of the sampling tube.

[0009] Optionally, a second flange is further provided on the outer side wall of the telescopic body for being detachably connected to the first flange of the sampling port device via a fastener.

[0010] Optionally, the multiple sections of the telescopic section are composed of a plurality of tube bodies that are slidably connected in sequence from the outside to the inside, and the plurality of tube bodies include an outer tube body located at the outermost side, an inner tube body located at the innermost side, and at least one intermediate tube body located between the outer tube body and the inner tube body, and the inner end of the sampling tube is connected to the inner tube body, and the outer side wall of the outer tube body is designed to be tightly attached to the inner side wall of the sampling channel.

[0011] Optionally, rolling bearings are also provided on the outer side walls of the inner tube body and the at least one intermediate tube body.

[0012] Optionally, the sampling tube is further provided with a trumpet-shaped collecting port connected with the second air inlet, and the opening direction of the trumpet-shaped collecting port is perpendicular to the axial direction of the sampling tube.

[0013] Optionally, the flue gas sampling device also includes a flue gas analyzer connected to the second exhaust port.

[0014] The third aspect of the present disclosure also provides a waste heat boiler, including a boiler body, a sampling port device for a waste heat boiler as described above, or a flue gas sampling device for a waste heat boiler as described above, wherein the sampling port device is connected to the side wall of the boiler body.

[0015] Optionally, the side wall of the boiler body is also provided with an installation port for connecting to the sampling port device, the installation ports are arranged in pairs with colinear axes, each pair of the installation ports are symmetrically arranged on both sides of the furnace wall of the boiler body with respect to the horizontal center line of the boiler body, and the installation ports are constructed into multiple pairs, and the multiple pairs of the installation ports are arranged at intervals in the vertical direction.

[0016] Optionally, it also includes an air supply pipeline, one end of which is connected to the first air inlet of the sampling port device, and the other end is used to connect to an external cooling air source, and a stop valve is provided on the air supply pipeline.

[0017] Through the above technical scheme, that is, the sampling port device for a waste heat boiler provided by the present invention, the sampling port device arranges a sampling port body with an air supply channel on the waste heat boiler through a connecting portion, so that the sampling port body has an inner end located in the waste heat boiler and an outer end located outside the waste heat boiler, wherein the inner end of the outer tube is formed with a first exhaust port connected to the air supply channel, and the outer side wall of the outer tube is also provided with a first air inlet connected to the air supply channel and the first air inlet is located on the outside of the connecting portion. In this way, when the flue gas sampling device enters the waste heat boiler through the sampling channel formed inside the inner tube to perform flue gas sampling, cooling gas is filled into the interior of the waste heat boiler through the air supply channel. On the one hand, it can effectively prevent the high-pressure flue gas in the waste heat boiler from being ejected to the outside of the waste heat boiler through the sampling port body, and on the other hand, it can also effectively cool the sampling port body, thereby extending the service life of the sampling port body, and has good applicability and high stability. Therefore, the sampling port device for the waste heat boiler provided in the present invention can solve the problem that smoke leakage is prone to occur during flue gas flow field testing in related technologies, thereby causing certain safety hazards, effectively ensuring the personal safety of operators during flue gas sampling, and has the advantages of simple structure, low manufacturing cost and good operability.

[0018] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0020] Figure 1 is a schematic structural diagram of a sampling port body provided in an exemplary embodiment of the present disclosure;

[0021] Figure 2 is a schematic structural diagram of a sampling port body provided in another angle in an exemplary embodiment of the present disclosure;

[0022] Figure 3 is a schematic structural diagram of a smoke sampling device provided in an exemplary embodiment of the present disclosure;

[0023] Figure 4 is a schematic structural diagram of a waste heat boiler provided in an exemplary embodiment of the present disclosure;

[0024] Figure 5 yes Figure 4Cross-sectional view at the AA position.

[0025] Description of Reference Numerals

[0026] 1-outer cylinder; 110-straight cylinder section; 120-contracted section; 2-inner cylinder; 210-sampling channel; 220-sampling channel inlet; 230-sampling channel outlet; 3-air supply channel; 310-first exhaust port; 320-first air inlet; 4-waste heat boiler; 410-boiler body; 420-installation port; 5-first flange; 510-flange fastening hole; 6-telescopic body; 610-outer tube body; 620-inner tube body; 7-sampling tube; 710-second air inlet; 720-second exhaust port; 8-second flange; 810-flange installation hole; 9-rolling bearing; 10-trumpet-shaped collecting port; 11-rotating shaft; 12-connecting plate; 13-scaffolding; 14-third module; 15-fourth module. DETAILED DESCRIPTION

[0027] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0028] In the present disclosure, unless otherwise stated, "inside" and "outside" refer to the inside and outside relative to the outline of the component or structure itself. In addition, it should be noted that the terms used, such as "first" and "second", are used to distinguish one element from another element and do not have order and importance. In addition, in the description with reference to the drawings, the same mark in different drawings represents the same element.

[0029] The inventors have found that the cross-sectional dimensions of the waste heat boiler of the gas-steam combined cycle power generation and heating unit are a*b, which is approximately 12*28m, and there are six large heating surface modules in the waste heat boiler. A catalyst is usually arranged between the third module 14 and the fourth module 15, so that the flue gas in the waste heat boiler can be selectively catalytically reduced. The power generation and heating unit needs to detect the flue gas flow field before and after the catalyst before and after maintenance, wherein the flue gas temperature before the catalyst is approximately 350°C, and the flue gas temperature after the catalyst is approximately 330°C. In the related art, an S-shaped Pitot tube is usually used for flue gas detection, but there is a situation where the flue cross-sectional area of ​​the waste heat boiler is large and the length of the S-shaped Pitot tube is short, which makes it impossible to effectively detect, and the flue gas in the waste heat boiler is generally positive pressure. When the flue gas in the waste heat boiler is detected by, for example, a grid method, there is also a risk of flue gas leakage from the waste heat boiler, and there are certain safety hazards.

[0030] Based on this, according to the first aspect of the present disclosure, a sampling port device for a waste heat boiler is provided, referring to Figures 1 to 5As shown, the sampling port device includes a sampling port body, which includes an outer cylinder 1 and an inner cylinder 2 located inside the outer cylinder 1, an air supply channel 3 is formed between the inner wall of the outer cylinder 1 and the outer wall of the inner cylinder 2, the outer wall of the outer cylinder 1 is provided with a connecting portion for connecting to the waste heat boiler 4, and a first exhaust port 310 connected to the air supply channel 3 is formed at the inner end, and a first air inlet 320 connected to the air supply channel 3 is also provided on the outer wall of the outer cylinder 1, and the first air inlet 320 is located outside the connecting portion, so as to allow external cooling gas to enter the air supply channel 3 and be guided to the inside of the waste heat boiler 4, and a sampling channel 210 for the sampling device to enter and exit the waste heat boiler 4 is formed inside the inner cylinder 2.

[0031] Through the above technical scheme, that is, the sampling port device for the waste heat boiler provided by the present invention, the sampling port device arranges the sampling port body with the air supply channel 3 on the waste heat boiler 4 through the connecting part, so that the sampling port body has an inner end located in the waste heat boiler 4 and an outer end located outside the waste heat boiler 4, wherein the inner end of the outer tube 1 is formed with a first exhaust port 310 connected to the air supply channel 3, and the outer side wall of the outer tube 1 is also provided with a first air inlet 320 connected to the air supply channel 3, and the first air inlet 320 is located on the outside of the connecting part. In this way, when the flue gas sampling device enters the waste heat boiler 4 through the sampling channel formed inside the inner tube 2 to sample the flue gas, cooling gas is filled into the interior of the waste heat boiler 4 through the air supply channel 3. On the one hand, it can effectively prevent the high-pressure flue gas in the waste heat boiler 4 from being ejected to the outside of the waste heat boiler 4 through the sampling port body, and on the other hand, it can also effectively cool the sampling port body, thereby extending the service life of the sampling port body, and has good applicability and high stability. Therefore, the sampling port device for the waste heat boiler provided in the present invention can solve the problem of smoke leakage that is prone to occur during flue gas flow field testing in related technologies, thereby causing certain safety hazards, effectively ensuring the personal safety of operators during flue gas sampling, and has the advantages of simple structure, low manufacturing cost and good operability.

[0032] It should be noted here that the outer wall of the outer tube 1 can be fixedly connected to the inner wall of the mounting opening 420 of the waste heat boiler 4 by, for example, welding, so the connecting portion at this time can be, for example, a welding material formed at the weld between the outer wall of the outer tube 1 and the inner wall of the mounting opening 420 of the waste heat boiler 4; or, the outer wall of the outer tube 1 can also be fixedly connected to the inner wall of the mounting opening 420 of the waste heat boiler 4 by, for example, a connecting piece, so the connecting portion at this time can be, for example, a connecting piece such as a connecting flange, the purpose of which is to achieve stable fixing of the outer tube 1 to the waste heat boiler 4, and the present disclosure does not make specific limitations here.

[0033] The outer cylinder 1 and the inner cylinder 2 can be constructed in any suitable manner according to actual application requirements. For example, in some embodiments, Figures 1 to 5As shown, the outer cylinder 1 and the inner cylinder 2 can be arranged coaxially, and the outer ends are fixed by the first flange 5, so that the outer cylinder 1 can be stably connected to the inner cylinder 2. In addition, the center hole on the first flange 5 forms a sampling channel inlet 220 for the sampling device to enter and exit, and the sampling channel inlet 220 is connected to the sampling channel, so that the operator can operably send the sampling device into the sampling channel through the sampling channel inlet 220 and extend it from the sampling channel outlet 230 to the interior of the waste heat boiler 4 to sample the flue gas, which has good controllability, and the flange fastening hole 510 of the first flange 5 is used to detachably fix the sampling device, so that the sampling device can be stably connected to the sampling port body, so that the operator does not need to always take the sampling device for sampling operations, which is more time-saving and labor-saving, and has higher operating efficiency.

[0034] In addition, the inner cylinder 2 can be constructed as a straight cylinder structure, and the outer cylinder 1 can have a straight cylinder section 110 and a tapered section 120, and the tapered section 120 gradually shrinks from the straight cylinder section 110 toward the inner end of the inner cylinder 2 to form a first exhaust port 310 with the inner end of the inner cylinder 2, so as to better form a cooling air mass at the sampling channel outlet 230 of the sampling channel 210 for preventing the leakage of high-pressure flue gas in the waste heat boiler 4, thereby effectively preventing the high-pressure flue gas in the waste heat boiler 4 from being ejected to the outside of the waste heat boiler 4 through the sampling port body, thereby ensuring the personal safety of the operator when taking flue gas samples.

[0035] In some embodiments not shown in the figure, the sampling port device may further include a sealing plate, which is detachably connected to the first flange 5 for operably opening or closing the sampling channel inlet 220. In this way, when flue gas sampling is not required, the operator can lock the sealing plate to the first flange 5 by, for example, fasteners to ensure good airtightness of the sampling port device and effectively avoid leakage of high-pressure flue gas in the waste heat boiler 4. When flue gas sampling is required, the operator can remove the sealing plate to enable the sampling device to enter the waste heat boiler 4 through the sampling channel 210, which has good operability. Among them, the fasteners can be constructed as, for example, bolts, etc., the purpose of which is to enable the sealing plate to be unlockably connected to the first flange 5; in addition, in order to ensure that the sampling port device has good high temperature resistance, the materials of the components of the sampling port device can be constructed as, for example, stainless steel to improve the overall high temperature resistance and effectively avoid deformation or burning of the sampling port device on the waste heat boiler. The present disclosure does not make specific limitations here.

[0036] According to a second aspect of the present disclosure, a flue gas sampling device for a waste heat boiler is also provided, referring to Figures 1 to 5As shown, the flue gas sampling device includes a telescopic body 6 and a sampling tube 7. The telescopic body 6 is used to detachably penetrate the above-mentioned sampling port device, including multiple telescopic sections that are slidably connected in sequence, so that the telescopic movement of the multiple telescopic sections can realize the sampling operation of the flue gas at any point on the cross section of the waste heat boiler 4, and the outer wall of at least one telescopic section in the telescopic body 6 is designed to be closely fitted to the inner wall of the sampling channel 210, so as to ensure good airtightness during flue gas sampling. The inner end of the sampling tube 7 extends to the inside of the telescopic body 6 to form a second air inlet 710, and the outer end is located outside the outer end of the telescopic body 6 to form a second exhaust port 720, so that the sampling tube 7 can realize the sampling of the flue gas in the waste heat boiler 4. Among them, the sampling tube 7 is also connected to the innermost telescopic section of the telescopic body 6, so that the telescopic movement of the telescopic body 6 can be driven by operating the outer end of the sampling tube 7, and the controllability is good. In addition, the material of the telescopic body 6 can be, for example, stainless steel to improve the overall high temperature resistance; the sampling tube 7 can be constructed as, for example, a stainless steel mesh tube, so that it can sample the flue gas in the waste heat boiler 4 while also driving the multiple telescopic sections to perform telescopic movements. The flue gas sampling device can solve the problem of flue gas leakage in the flue gas flow field test in the related technology, thereby causing certain safety hazards, and has all the beneficial effects of the above-mentioned sampling port device, which will not be repeated in this disclosure.

[0037] In some embodiments, reference Figures 1 to 5 As shown, a second flange 8 for detachably connecting to the first flange 5 of the sampling port device through a fastener may also be provided on the outer side wall of the telescopic body 6. The fastener may be, for example, a bolt, so that the operator can thread the bolt through the flange mounting hole 810 of the second flange 8 and then thread it into the flange fastening hole 510 configured as a threaded hole on the first flange 5.

[0038] The multiple telescopic sections can be constructed in any suitable manner according to the actual application requirements, for example, Figures 1 to 5 As shown, the multi-section telescopic section can be constructed as a plurality of tube bodies that are slidably sleeved from the outside to the inside in sequence, and the plurality of tube bodies include an outer tube body 610 located at the outermost side, an inner tube body 620 located at the innermost side, and at least one intermediate tube body located between the outer tube body 610 and the inner tube body 620. The structure is simple and the manufacturing cost is low. In addition, the inner end of the sampling tube 7 is connected to the inner tube body 620, so that the inner tube body 620 can be driven to move by pulling the sampling tube 7, and at the same time, the inner tube body 620 drives at least one intermediate tube body and the outer tube body 610 to telescope in sequence, thereby realizing the sampling operation of the flue gas at any point on the cross section of the waste heat boiler 4, and the controllability is good. In addition, the outer wall of the outer tube body 610 is designed to be close to the inner wall of the sampling channel 210, so as to ensure a better airtightness during flue gas sampling.

[0039] In some embodiments, reference Figures 1 to 5 As shown, the head end of the outer tube body 610 and at least one intermediate tube body can be provided with a limiting structure, and the tail end of the inner tube body 620 and at least one intermediate tube body can be provided with a limiting matching structure, and the limiting structure cooperates with the corresponding limiting matching structure to limit the tail end of the tube body located on the inner side of the multiple tube bodies within the adjacent tube body located on the outer side. Among them, the limiting structure can be constructed as an annular baffle (not shown in the figure) arranged at the opening of the head end of the outer tube body 610 and at least one intermediate tube body, the annular baffle cover is arranged at the opening, and the inner hole size of the annular baffle is smaller than the size of the opening, and the limiting matching structure is constructed as a protrusion (not shown in the figure) formed at the opening of the tail end of the inner tube body 620 and at least one intermediate tube body, so that the annular baffle can stop at the protrusion, and the structure is simple and stable.

[0040] In order to avoid deformation or jamming of the telescopic body 6 due to the high temperature in the waste heat boiler 4 during the telescopic movement, in some embodiments, reference Figure 3 As shown, rolling bearings 9 are also provided on the outer side walls of the inner tube 620 and at least one intermediate tube to facilitate the telescopic movement of the telescopic body 6. Figure 3 It is exemplarily shown that the rolling bearing 9 is rotatably arranged on the head end of the outer tube body 610 and at least one intermediate tube body through the rotating shaft 11, and the rotating shaft 11 is fixed to the tube body through the connecting plate 12 extending along the telescopic direction of the multi-section telescopic section, with a simple structure and good stability.

[0041] In order to facilitate the sampling tube 7 to perform flue gas sampling operations, in some embodiments, reference Figures 3 to 5 As shown, the sampling tube 7 may also be provided with a trumpet-shaped collecting port 10 connected to the second air inlet 710, and the opening direction of the trumpet-shaped collecting port 10 is perpendicular to the axial direction of the sampling tube 7, that is, toward the direction of the flue gas in the waste heat boiler 4, so as to better collect the flue gas. Figure 4 In addition, the flue gas sampling device may further include a flue gas analyzer (not shown in the figure) connected to the second exhaust port 720, so that the flue gas in the waste heat boiler 4 can be guided to the flue gas analyzer via the sampling tube 7, thereby achieving the purpose of flue gas sampling and analysis; of course, the flue gas sampling device may also include a flue gas collecting member (not shown in the figure) connected to the second exhaust port 720, thereby achieving the purpose of flue gas sampling and collection, and further exhausting the collected flue gas to a device such as a flue gas analyzer to complete the sampling and analysis of the flue gas, which is not specifically limited in the present disclosure.

[0042] According to a third aspect of the present disclosure, a waste heat boiler is also provided, referring to Figures 1 to 5As shown, the waste heat boiler includes a boiler body 410, the sampling port device for the waste heat boiler or the flue gas sampling device for the waste heat boiler, wherein the sampling port device is connected to the side wall of the boiler body 410. The waste heat boiler can solve the problem of flue gas leakage in the flue gas flow field test in the related art, thereby causing certain safety hazards, and has all the beneficial effects of the sampling port device or the flue gas sampling device, which will not be repeated in this disclosure.

[0043] In some embodiments, reference Figures 1 to 5 As shown, the side wall of the boiler body 410 may also be provided with mounting ports 420 for connecting to the sampling port device, the mounting ports 420 are arranged in pairs and the axes are colinear, each pair of mounting ports 420 is symmetrically arranged on both sides of the furnace wall of the boiler body 410 about the horizontal center line of the boiler body 410, and the mounting ports 420 are constructed into multiple pairs, and the multiple pairs of mounting ports 420 are arranged at intervals in the vertical direction, so that the operator can operably connect the multiple sampling port bodies to the corresponding mounting ports 420 respectively, and enter the waste heat boiler 4 through the sampling device through the corresponding sampling channels 210 of the multiple sampling port bodies, so as to realize the sampling operation of the flue gas at any point on the cross section of the waste heat boiler 4 through, for example, the grid method, with good controllability and effectively ensuring the accuracy of the flue gas detection results.

[0044] It should be noted that, Figure 5 As shown, the cross-sectional length a of the waste heat boiler 4 is 12m, so the maximum extension of the telescopic body 6 should be constructed to be no less than a / 2, that is, 6m, so as to ensure that the flue gas detection at any point on the cross section of the waste heat boiler 4 can be achieved through the multiple installation ports 420 symmetrically arranged on both sides of the furnace wall of the waste heat boiler 4; it should be noted that the maximum extension of the telescopic body 6 is constructed to be no more than 8m, so as to avoid the problem of bending caused by the overhang of the telescopic body 6, which affects the effective sampling of the flue gas; in addition, the telescopic body 6 is too long and will also cause a large weight, which is not conducive to the disassembly and assembly of the operator. In addition, multiple installation ports 420 can be set on the fourth module 15 of the waste heat boiler 4, that is, after the catalyst catalytic reduction reaction, or multiple installation ports 420 can also be set on both the third module 14 and the fourth module 15 of the waste heat boiler 4 (not shown in the figure), that is, the installation ports 420 are set before and after the catalyst catalytic reduction reaction, and the present disclosure does not make specific limitations here.

[0045] In some embodiments not shown in the figure, the waste heat boiler 4 also includes an air supply pipeline, one end of which is connected to the first air inlet 320 of the sampling port device, and the other end is used to connect to an external cooling gas source, and a stop valve is provided on the air supply pipeline, so that the opening and closing of the stop valve can be operably controlled to complete the supply of cooling gas. Among them, the stop valve can be constructed as a manual valve or an electric valve, so that the opening and closing of the stop valve can be controlled manually, or by connecting the stop valve to the controller signal to automatically control the opening and closing of the stop valve. In addition, the controller can be constructed in any suitable manner, for example, it can be constructed as a PLC controller, and can be connected to the stop valve signal by wire or wirelessly, which is not specifically limited in the present disclosure.

[0046] In addition, since the cross-sectional height b of the waste heat boiler 4 is 28 m, the high height makes it inconvenient for operators to disassemble and assemble corresponding parts and perform flue gas sampling operations. Therefore, in some embodiments, reference is made to Figure 5 As shown, scaffolding 13 may be provided on both sides of the furnace wall of the waste heat boiler 4 to facilitate the operation of the operators.

[0047] Based on the above embodiments, the present disclosure exemplarily describes the working process of the waste heat boiler 4 when performing flue gas sampling, which is as follows. When the operator performs flue gas sampling, the operator first operates to open the stop valve to discharge the external cooling gas to the interior of the waste heat boiler 4 through the air supply channel 3, so as to form a cooling air mass at the outlet 230 of the sampling channel for preventing the flue gas in the waste heat boiler 4 from leaking through the sampling channel 210. Then, the sealing plate of one of the sampling port devices on the multiple installation ports 420 of the waste heat boiler 4 is removed, and then the outer tube body 610 of the telescopic body 6 of the sampling device is connected to the first flange 5 of the sampling port body through the second flange 8 thereon, so that the telescopic body 6 can enter the interior of the waste heat boiler 4 through the sampling channel 210. Then, the operator pulls the sampling tube 7 to realize the telescopic movement of the telescopic body 6 in the waste heat boiler to the corresponding flue gas detection area, and through the connection to The second exhaust port 720 of the sampling tube 7, for example, a flue gas analyzer guides the flue gas in the waste heat boiler 4 from the trumpet-shaped collecting port 10 of the sampling tube 7 through the inner cavity of the sampling tube 7 to the flue gas analyzer, thereby completing the flue gas sampling and analysis operation. After the detection of one flue gas detection area is completed, the telescopic body 6 is moved to the next flue gas detection area. After all the flue gas detection areas are detected, the telescopic body 6 of the sampling device is pulled out from the sampling channel 210, and the corresponding sealing plate is locked to the sampling port body, and finally the stop valve is closed; after the flue gas sampling and analysis of one installation port 420 of the waste heat boiler 4 is completed, the next installation port 420 is detected, and the above steps are repeated. The flue gas sampling operation of the cross section of the waste heat boiler 4 can be efficiently realized by the grid method, with good controllability and high efficiency, and at the same time, the leakage of high-pressure flue gas in the waste heat boiler 4 is effectively prevented, thereby ensuring the personal safety of the operator during flue gas sampling.

[0048] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0049] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0050] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A flue gas sampling device for a waste heat boiler, characterized in that: The flue gas sampling device comprises: The vent pipe is an airtight container, and the vent pipe is an airtight container, wherein the vent pipe is an airtight container, and the vent pipe is an airtight container. The vent pipe is an airtight container, and the vent pipe is an airtight container. The vent pipe is an airtight container, and the vent pipe is an airtight container. The vent pipe is an airtight container, and the vent pipe is an airtight container. A telescopic body, the telescopic body is used to be detachably installed through the sampling port device, including a plurality of telescopic sections that are slidably connected in sequence, and the outer side wall of at least one telescopic section of the telescopic body is designed to be closely fitted to the inner side wall of the sampling channel; and A sampling tube, the inner end of which extends into the interior of the telescopic body to form a second air inlet, and the outer end of which is located outside the outer end of the telescopic body to form a second air outlet, wherein the sampling tube is also connected to the innermost telescopic section of the telescopic body, so that the telescopic body can be driven to telescope by operating the outer end of the sampling tube; The multiple sections of the telescopic section are composed of a plurality of tube bodies that are slidably sleeved in sequence from outside to inside, the plurality of tube bodies include an outer tube body located at the outermost side, an inner tube body located at the innermost side, and at least one intermediate tube body located between the outer tube body and the inner tube body, and the inner end of the sampling tube is connected to the inner tube body, and the outer side wall of the outer tube body is designed to be closely attached to the inner side wall of the sampling channel; Rolling bearings are also arranged on the outer side walls of the inner tube body and the at least one intermediate tube body.

2. The flue gas sampling device for waste heat boiler according to claim 1, characterized in that: A second flange is also provided on the outer side wall of the telescopic body and is used for being detachably connected to the first flange of the sampling port device through a fastener.

3. The flue gas sampling device for waste heat boiler according to claim 1, characterized in that: The sampling tube is also provided with a trumpet-shaped collecting port which is in communication with the second air inlet, and the opening direction of the trumpet-shaped collecting port is perpendicular to the axial direction of the sampling tube.

4. The flue gas sampling device for waste heat boiler according to claim 1, characterized in that: The flue gas sampling device also includes a flue gas analyzer connected to the second exhaust port.

5. A waste heat boiler, characterized in that: include Boiler body, The flue gas sampling device for a waste heat boiler according to any one of claims 1 to 4, The sampling port device is connected to the side wall of the boiler body.

6. The waste heat boiler according to claim 5, characterized in that: The side wall of the boiler body is also provided with an installation port for connecting to the sampling port device, the installation ports are arranged in pairs and the axes are colinear, each pair of the installation ports is symmetrically arranged on both sides of the furnace wall of the boiler body about the horizontal center line of the boiler body, and the installation ports are constructed into multiple pairs, and the multiple pairs of the installation ports are arranged at intervals in the vertical direction.

7. The waste heat boiler according to claim 6, characterized in that: It also includes an air supply pipeline, one end of which is connected to the first air inlet of the sampling port device, and the other end is used to connect to an external cooling air source, and a stop valve is arranged on the air supply pipeline.

8. The waste heat boiler according to claim 5, characterized in that: The inner cylinder is a straight cylinder structure, and the outer cylinder has a straight cylinder section and a constricted section, wherein the constricted section gradually constricts from the straight cylinder section toward the inner end of the inner cylinder to form the first exhaust port with the inner end of the inner cylinder.

9. The waste heat boiler according to claim 5, characterized in that: It also includes a sealing plate, which is detachably connected to the first flange to operably open or close the inlet of the sampling channel.

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