Matrix type online sampling system of gas turbine waste heat boiler

Abstract

The utility model relates to the field of boiler flue detection, in particular to a gas turbine waste heat boiler matrix type online sampling system which comprises a sampling unit located in a gas turbine waste heat boiler denitration reactor outlet flue and a sampling pipeline communicated with the sampling unit and arranged on the gas turbine waste heat boiler denitration reactor outlet flue in a penetrating mode. And the conveying pipeline is used for conveying the sampled flue gas. The flue gas sampling device has the effect of more accurately sampling and detecting the flue gas of the waste heat boiler of the gas turbine.

Description

Technical Field

[0001] This application relates to the field of boiler flue gas duct inspection, and in particular to a matrix-type online sampling system for gas turbine waste heat boilers. Background Technology

[0002] A waste heat boiler is a boiler that utilizes the residual heat from waste gas, waste materials, or waste liquids generated in various industrial processes, as well as the heat generated from the combustion of combustible substances, to heat water to a specific working fluid. Waste heat boilers can produce hot water or steam through waste heat recovery to supply other processes. Waste heat boilers are customized boilers, requiring design based on parameters such as flue gas temperature, composition, and flow rate. The boiler flue is an integral part of the boiler, and its condition directly affects the boiler's safe and stable operation, as well as environmental emissions. For environmental protection and to optimize boiler combustion efficiency, it is generally necessary to sample and test the flue gas within the flue. By testing the flue gas composition and temperature, the boiler's combustion efficiency can be assessed, the presence of incomplete combustion can be determined, and whether the exhaust gas meets environmental emission standards.

[0003] A gas turbine waste heat boiler is a type of waste heat boiler closely connected to a gas turbine combined cycle power generation system. Its main function is to recover the waste heat from the high-temperature exhaust gas of the gas turbine, converting it into steam to drive a steam turbine for power generation or to meet the heating needs of industrial production. The operating efficiency of a gas turbine waste heat boiler is closely related to the combustion process. By sampling and analyzing the flue gas, its composition can be improved, helping to optimize the combustion process and increase the thermal efficiency of the gas turbine waste heat boiler.

[0004] The flue of a gas turbine waste heat boiler differs from that of a regular boiler. If the existing flue gas sampling system is used, it is easy to cause inaccurate test results and pose safety hazards. Moreover, the current flue gas sampling system can only detect the flue gas composition in the flue gas outlet of the boiler denitrification reactor in a single area and at a single measuring point. This is not conducive to more accurate and representative measurements of the flue gas, nor to optimizing and adjusting the operation of the waste heat boiler denitrification system. Utility Model Content

[0005] To enable more accurate sampling and testing of flue gas from gas turbine waste heat boilers, this application provides a matrix-type online sampling system for gas turbine waste heat boilers.

[0006] This application provides a matrix-type online sampling system for gas turbine waste heat boilers, which adopts the following technical solution:

[0007] A matrix-type online sampling system for gas turbine waste heat boilers includes:

[0008] The sampling unit is located inside the outlet flue of the denitrification reactor of the gas turbine waste heat boiler, and each sampling unit has multiple sampling points.

[0009] A sampling pipeline is connected to the sampling unit, and the sampling pipeline passes through the outlet flue of the denitrification reactor of the gas turbine waste heat boiler.

[0010] A transmission pipeline is connected to a sampling pipeline, and a detection and analysis component is provided on the transmission pipeline.

[0011] By adopting the above technical solution, sampling units are matrix-distributed within the outlet flue of the gas turbine waste heat boiler denitrification reactor, with each unit having multiple sampling points to cover different locations within the flue. Compared to single-point sampling, this provides more comprehensive information on the composition of the flue gas, avoiding data bias due to a single sampling point and thus more accurately reflecting the true state of the flue gas within the entire flue. Simultaneously, since the flow field distribution within the outlet flue of the gas turbine waste heat boiler denitrification reactor is often uneven, the matrix sampling system can sample from different flow field regions, enabling matrix-based zonal measurement of flue gas composition in different areas of the gas turbine waste heat boiler denitrification reactor outlet flue. This allows for understanding the zonal NOx deviation within each region, providing a reasonable data basis for optimized denitrification control. The multiple sampling units and points ensure that the entire sampling process does not fail due to blockage, damage, or other malfunctions at a single sampling point. Even if some sampling points experience problems, other normal sampling points can continue operating, guaranteeing normal system operation and improving the overall reliability and stability of the system.

[0012] Preferably, the centerline of the outlet flue of the gas turbine waste heat boiler denitrification reactor divides the outlet flue of the gas turbine waste heat boiler denitrification reactor into a left flue zone and a right flue zone;

[0013] Both the left and right sections of the flue are provided with one or more sampling units.

[0014] By adopting the above technical solution, the sampling units measure the flue gas conditions in the left and right zones of the flue. Multiple sampling units can better capture local changes in each zone, promptly identify potential problems, ensure the safe and stable operation of the gas turbine waste heat boiler denitrification system, and facilitate the comparison of flue gas characteristics between the two zones, helping operators quickly locate the problem. The wear conditions on the left and right sides of the outlet flue of the gas turbine waste heat boiler denitrification reactor may differ due to differences in airflow distribution and flue gas composition, potentially leading to large deviations in nitrogen oxide concentration fields and uneven ammonia injection. Sampling both the left and right zones of the flue can promptly detect any anomalies on one side, accurately understand the spatial differences in the combustion process, and precisely adjust parameters such as burner air distribution to improve the thermal efficiency of the gas turbine waste heat boiler, reduce energy waste, and simultaneously save reducing agent consumption by adjusting and optimizing the denitrification ammonia injection system.

[0015] Preferably, the sampling unit includes a first horizontal tube, a second horizontal tube, and a vertical tube, with both ends of the vertical tube connected to the side walls of the first horizontal tube and the second horizontal tube, respectively, and the sampling pipeline connected to the side wall of the vertical tube.

[0016] Both the first horizontal tube and the second horizontal tube are provided with multiple sampling points.

[0017] By adopting the above technical solution, this structure enables sampling in different dimensions of the flue. This multi-dimensional sampling method can obtain more representative samples and more accurately reflect the overall condition of the flue gas in the flue. In the outlet flue of the denitrification reactor of the gas turbine waste heat boiler, due to the complexity of the combustion process and the uneven distribution of airflow, the characteristics of the flue gas may change significantly in local areas. Multiple sampling points are distributed on the first and second horizontal pipes, which can effectively reduce sampling blind spots, better capture these local changes, ensure that no information is missed, and provide complete data support for subsequent accurate analysis.

[0018] Preferably, the first horizontal tube and the second horizontal tube have the same length, and the ends of the first horizontal tube and the second horizontal tube are located on the same axis.

[0019] The vertical tube is located at the center of the first horizontal tube; or

[0020] The vertical tube is positioned near the end of the first horizontal tube.

[0021] By adopting the above technical solution, the flow velocity and composition distribution of the flue gas flowing through the flue may not be uniform in the cross-section. When the first horizontal pipe and the second horizontal pipe are of the same length and their ends are located on the same axis, this symmetrical structure helps to achieve more uniform sampling in the cross-section of the flue, so that the sampling points can better cover the transverse area of ​​the flue and reduce data errors caused by sampling position deviations. When the vertical pipe is set close to the end of the first horizontal pipe, it can reduce the local interference to the flow of flue gas to a certain extent, so that the flue gas can maintain a relatively stable flow state when flowing through the sampling pipe.

[0022] Preferably, the sampling unit located in the left zone of the flue is positioned at the center of the left zone of the flue; the sampling unit located in the right zone of the flue is positioned at the center of the right zone of the flue.

[0023] By adopting the above technical solution, the center positions of the left and right zones of the flue can, to a certain extent, represent the average state of the flue gas in their respective zones. Setting the sampling unit at this location can obtain a relatively typical flue gas sample of that zone. Moreover, compared with sampling at the edge of the flue or other non-central locations, sampling at the center can effectively avoid deviations caused by local factors such as proximity to the flue wall.

[0024] Preferably, the number of detection units provided in the left and right sections of the flue is the same.

[0025] By adopting the above technical solution, setting the same number of monitoring units in the left and right zones of the flue can ensure that the amount of data obtained from the two zones is balanced. This allows for a fairer and more comprehensive consideration of the conditions in both zones when analyzing the flue gas. For comparative analysis of the two zones, the same number of monitoring units provides a more reliable basis for comparison, making it easier and more accurate to compare various parameters in the left and right zones of the flue.

[0026] Preferably, the opening of the sampling point faces away from the direction of flue gas flow, and each sampling point is equipped with a detachable filter component.

[0027] By adopting the above technical solution, in the flue gas of the gas turbine waste heat boiler, the flue gas usually contains various impurities. If these impurities directly enter the sampling system, they may block the sampling pipeline, affecting the accuracy and continuity of sampling. The sampling point opening is opposite to the flue gas flow direction to avoid large particles of impurities entering the sampling point with the flue gas. By setting this opening direction, impurities in the flue gas are prevented from entering the sampling point under inertia, thereby improving the purity of the sample. A detachable filter component is installed at the sampling point to finely filter the flue gas entering the sampling point. The filter component can effectively intercept tiny impurity particles, droplets, etc., ensuring that the flue gas sample entering the sampling pipeline better meets the testing requirements.

[0028] Preferably, the sampling pipeline is equipped with a control valve located outside the outlet flue of the gas turbine waste heat boiler denitrification reactor.

[0029] By adopting the above technical solution, a control valve is installed outside the outlet flue of the gas turbine waste heat boiler denitrification reactor in the sampling pipeline. This allows for convenient control of the start and stop of the sampling process. When sampling needs to be suspended during the initial start-up, commissioning, or in case of abnormalities, the sampling operation can be stopped immediately by closing the valve. When periodic testing or resampling is required after troubleshooting, the valve can be opened, making the sampling process more flexible and convenient for operation according to actual needs.

[0030] Preferably, the detection and analysis component includes a pretreatment module, a sampling pump, and a flue gas analyzer, wherein the pretreatment module, the sampling pump, and the flue gas analyzer are sequentially installed on the transmission pipeline.

[0031] By adopting the above technical solutions, the flue gas extracted from the outlet flue of the denitrification reactor in the gas turbine waste heat boiler often contains various impurities, such as dust, moisture, and oil droplets. The pretreatment module can remove these impurities through operations such as filtration, dehumidification, and oil removal, making the flue gas sample entering the subsequent analysis instrument purer. The sampling pump can provide stable power for the flow of the flue gas sample in the transmission pipeline, ensuring that the flue gas enters the flue gas analyzer at an appropriate flow rate and pressure, avoiding analysis errors caused by unstable flow rate or pressure fluctuations. The flue gas analyzer is the core part of the entire detection and analysis component. The pretreated pure flue gas and stable delivery conditions enable it to perform at its best, providing reliable data support for evaluating the combustion efficiency and environmental performance of the gas turbine waste heat boiler.

[0032] Preferably, the pretreatment module includes a heating and filtration module, a cooling module, and a drying module installed sequentially.

[0033] The cooling module is also connected to a condensate treatment module.

[0034] By adopting the above technical solutions, the flue gas from the gas turbine waste heat boiler may contain some impurities that are gaseous at high temperatures but condense at low temperatures, or some viscous substances that are difficult to filter. The heating and filtration module is the first step in pretreatment. It can filter the flue gas sample under high temperature conditions to remove large particulate impurities, tar, and other substances, providing a relatively clean sample basis for subsequent processing. After heating and filtration, the flue gas enters the cooling module to reduce the flue gas temperature to a suitable range, avoiding damage to the instrument or affecting its analytical accuracy due to excessively high temperatures. The drying module can remove moisture from the flue gas, and the condensate treatment module connected to the cooling module can effectively collect and treat the condensate generated during the cooling process, providing more information for a comprehensive understanding of the operation of the gas turbine waste heat boiler.

[0035] In summary, this application includes at least one of the following beneficial technical effects:

[0036] 1. The sampling units are matrix-distributed within the outlet flue of the gas turbine waste heat boiler denitrification reactor, with each unit having multiple sampling points to cover different locations within the flue. Compared to single-point sampling, this provides a more comprehensive acquisition of information such as the composition of the flue gas, avoiding data bias caused by a single sampling point and thus more accurately reflecting the true state of the flue gas throughout the entire flue. Simultaneously, since the flow field distribution within the outlet flue of the gas turbine waste heat boiler denitrification reactor is often uneven, the matrix sampling system can sample from different flow field regions, enabling matrix-based zonal measurement of flue gas composition in different areas of the gas turbine waste heat boiler denitrification reactor outlet flue. This allows for understanding the zonal NOx deviation within each zone, providing a reasonable data basis for optimized denitrification control. The multiple sampling units and points ensure that the entire sampling process does not fail due to blockage, damage, or other malfunctions at a single sampling point. Even if some sampling points experience problems, other normal sampling points can continue to operate, guaranteeing the normal operation of the system and improving its overall reliability and stability.

[0037] 2. For flue gas flowing through the flue, its velocity and composition distribution on the cross-section may not be uniform. When the first horizontal pipe and the second horizontal pipe are of the same length and their ends are located on the same axis, this symmetrical structure helps to achieve more uniform sampling on the cross-section of the flue, so that the sampling point can better cover the transverse area of ​​the flue and reduce data errors caused by sampling position deviation. When the vertical pipe is set close to the end of the first horizontal pipe, it can reduce the local interference to the flue gas flow to a certain extent, so that the flue gas maintains a relatively stable flow state when flowing through the sampling pipe. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the overall structure of one embodiment of this application;

[0039] Figure 2 This is a schematic diagram of the overall structure of another embodiment of this application;

[0040] Figure 3 This is a schematic diagram illustrating the structure of the sampling unit.

[0041] Explanation of reference numerals in the attached diagram: 01, flue gas duct at the outlet of the denitrification reactor of the gas turbine waste heat boiler; 011, left section of the flue gas duct; 012, right section of the flue gas duct; 1, sampling unit; 11, first horizontal pipe; 12, second horizontal pipe; 13, vertical pipe; 14, sampling point; 141, filter assembly; 2, sampling pipeline; 21, control valve; 3, transmission pipeline; 4, detection and analysis assembly; 41, pretreatment module; 42, sampling pump; 43, flue gas analyzer. Detailed Implementation

[0042] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0043] This application discloses a matrix-type online sampling system for a gas turbine waste heat boiler. The matrix-type online sampling system for a gas turbine waste heat boiler includes a sampling unit 1 located in the outlet flue 01 of the denitrification reactor of the gas turbine waste heat boiler, a sampling pipeline 2 connected to the sampling unit 1 and passing through the outlet flue 01 of the denitrification reactor of the gas turbine waste heat boiler, and a transmission pipeline 3 for transmitting the sampled flue gas.

[0044] Sampling units 1 are arranged in a matrix within the outlet flue 01 of the gas turbine waste heat boiler denitrification reactor, and each sampling unit 1 has multiple sampling points 14. This matrix-style arrangement of sampling units 1, with multiple sampling points 14 on each unit, covers different locations within the flue. Compared to single-point sampling, this provides a more comprehensive understanding of the flue gas composition, temperature, and pressure, avoiding incomplete data due to a single sampling point 14, and thus more accurately reflecting the true state of the flue gas within the entire flue. Since the flow field distribution within the outlet flue 01 of the gas turbine waste heat boiler denitrification reactor is often non-uniform, the matrix sampling system can sample from different flow field regions. Even when the flow field changes, the combined data from multiple sampling points 14 can more accurately capture changes in flue gas characteristics, providing a reliable basis for subsequent analysis and control. Preferably, the matrix sampling system can sample in different flow field regions, enabling matrix-based zonal measurement of flue gas composition in different areas within the outlet flue gas duct 01 of the gas turbine waste heat boiler denitrification reactor. This allows for understanding the zonal deviation of NOx in each zone, thus providing a reasonable data basis for optimized denitrification control.

[0045] Optionally, the arrangement of multiple sampling units 1 and sampling points 14 ensures that the entire sampling process will not fail due to blockage, damage, or other malfunctions at a single sampling point 14. Even if some sampling points 14 encounter problems, other normal sampling points 14 can continue to operate, guaranteeing the normal operation of the system and improving its overall reliability and stability. In an optional embodiment, matrix sampling makes it easier to incorporate self-cleaning and anti-clogging devices and measures during system design. For example, the sampling pipeline 2 can be backflushed periodically to remove dust and impurities that may accumulate in the pipeline, preventing blockages and ensuring the long-term stable operation of the sampling system. Optionally, real-time analysis of the flue gas on the transmission pipeline 3 using the online detection and analysis component 4 can promptly obtain changes in the concentration of various components in the flue gas, optimize the performance of the gas turbine waste heat boiler denitrification system, reduce reductant consumption, and extend the service life of the equipment.

[0046] In an optional embodiment, the centerline of the outlet flue 01 of the gas turbine waste heat boiler denitrification reactor divides the outlet flue 01 into a left flue zone 011 and a right flue zone 012. Both the left and right flue zones 011 and 012 are equipped with one or more sampling units 1. The sampling units 1 measure the flue gas conditions in the left and right flue zones 011 and 012 respectively. Multiple sampling units 1 can better capture local changes in each zone, promptly identify potential problems, ensure the safe and stable operation of the gas turbine waste heat boiler denitrification system, and facilitate comparison of the flue gas characteristics between the two zones, helping operators quickly locate problems, improve the thermal efficiency of the gas turbine waste heat boiler and the overall performance of the denitrification system, reduce energy waste, and simultaneously achieve the goal of saving reducing agent consumption by adjusting and optimizing the denitrification ammonia injection system.

[0047] In a preferred embodiment, every two sampling units 1 form a group, and the two sampling units 1 in the same group are symmetrically arranged with the centerline of the outlet flue gas duct 01 of the gas turbine waste heat boiler denitrification reactor as the axis. Since there may be some asymmetry in the combustion process and the gas flow within the flue gas duct, symmetrically arranging the sampling units 1 with the centerline of the outlet flue gas duct 01 of the gas turbine waste heat boiler denitrification reactor as the axis allows for more comprehensive and balanced acquisition of flue gas samples from both sides of the flue gas duct. The data captured through symmetrical sampling is more representative of the actual flue gas situation within the entire flue gas duct, thereby improving data accuracy. The symmetrical arrangement of the sampling units 1 facilitates comparative analysis. For example, the data acquired by sampling units 1 at the same positions in the left flue gas duct 011 and the right flue gas duct 012 can be directly compared. By comparing the parameters on both sides, problems such as large deviations in the nitrogen oxide concentration field and uneven ammonia injection that may exist within the outlet flue gas duct 01 of the gas turbine waste heat boiler denitrification reactor can be detected in a timely manner. This helps to more accurately assess the operating status of the gas turbine waste heat boiler denitrification system and provides a more targeted basis for optimization and adjustment.

[0048] In an optional embodiment, the sampling unit 1 includes a first horizontal pipe 11, a second horizontal pipe 12, and a vertical pipe 13. The two ends of the vertical pipe 13 are connected to the side walls of the first horizontal pipe 11 and the second horizontal pipe 12, respectively. The sampling pipeline 2 is connected to the side wall of the vertical pipe 13. Multiple sampling points 14 are provided on both the first horizontal pipe 11 and the second horizontal pipe 12. This structure enables sampling in different dimensions of the flue. Through this multi-dimensional sampling method, more representative samples can be obtained, more accurately reflecting the overall condition of the flue gas within the flue. In the outlet flue 01 of the gas turbine waste heat boiler denitrification reactor, due to the complex combustion process and uneven airflow distribution, the characteristics of the flue gas may vary significantly in local areas. Multiple sampling points 14 distributed on the first horizontal pipe 11 and the second horizontal pipe 12 can effectively reduce sampling blind spots, better capture these local changes, ensure no information is missed, and provide complete data support for subsequent accurate analysis.

[0049] In a preferred embodiment, the first horizontal tube 11 and the second horizontal tube 12 are of the same length, and their ends are located on the same axis. Optionally, the vertical tube 13 is located at the center of the first horizontal tube 11. When the first horizontal tube 11 and the second horizontal tube 12 are of the same length and their ends are located on the same axis, this symmetrical structure helps to achieve more uniform sampling on the cross-section of the flue. For the flue gas flowing through the flue, its velocity and composition distribution on the cross-section may not be uniform. With such a horizontal tube arrangement, the sampling point 14 can better cover the transverse area of ​​the flue, reducing data errors caused by sampling position deviations, thereby obtaining more comprehensive and accurate information on the composition of the flue gas in the flue. Optionally, the vertical tube 13 is located near the end of the first horizontal tube 11. When the vertical tube 13 is located near the end of the first horizontal tube 11, it can reduce local interference with the flow of flue gas to a certain extent, allowing the flue gas to maintain a relatively stable flow state when flowing through the sampling tube.

[0050] In a preferred embodiment, sampling unit 1 located in the left zone 011 of the flue is positioned at the center of the left zone 011; sampling unit 1 located in the right zone 012 of the flue is positioned at the center of the right zone 012. The center positions of the left and right zones of the flue can, to a certain extent, represent the average state of the flue gas in their respective areas. Positioning sampling unit 1 at these locations allows for the acquisition of relatively typical flue gas samples from those areas. Furthermore, compared to sampling at the edge of the flue or other non-central locations, sampling at the center effectively avoids deviations caused by local factors such as proximity to the flue wall.

[0051] Preferably, the number of detection units in the left zone 011 and the right zone 012 of the flue are the same. Setting the same number of monitoring units in the left zone 011 and the right zone 012 ensures that the amount of data obtained from the two zones is balanced. This allows for a fairer and more comprehensive consideration of the conditions in both zones when analyzing the flue gas. For comparative analysis of the two zones, the same number of monitoring units provides a more reliable basis for comparison, making it easier and more accurate to compare various parameters in the left zone 011 and the right zone 012.

[0052] In an optional embodiment, the opening of sampling point 14 faces away from the flue gas flow direction, and each sampling point 14 is equipped with a detachable filter assembly 141. In the flue gas duct of a gas turbine waste heat boiler, the flue gas typically contains various impurities. If these impurities directly enter the sampling system, they may clog the sampling pipeline 2, affecting the accuracy and continuity of sampling. The fact that the opening of sampling point 14 faces away from the flue gas flow direction prevents large particles of impurities from entering sampling point 14 with the flue gas. This opening orientation prevents impurities in the flue gas from entering sampling point 14 under inertial action, thereby improving the purity of the sample. The detachable filter assembly 141 at sampling point 14 allows for fine filtration of the flue gas entering sampling point 14. The filter assembly 141 can effectively intercept tiny impurity particles, droplets, etc., ensuring that the flue gas sample entering sampling pipeline 2 better meets the testing requirements. Optionally, the filter assembly 141 is threaded to sampling point 14.

[0053] In an optional embodiment, multiple sampling pipelines 2 are provided. A sealing assembly is installed between the sampling pipelines 2 and the outlet flue 01 of the gas turbine waste heat boiler denitrification reactor. Each sampling pipeline 2 is equipped with a control valve 21, which is located outside the outlet flue 01 of the gas turbine waste heat boiler denitrification reactor. The presence of control valves 21 outside the outlet flue 01 of the gas turbine waste heat boiler denitrification reactor on the sampling pipelines 2 allows for convenient control of the sampling process. During initial equipment startup, commissioning, or when sampling needs to be paused due to abnormal conditions, the sampling operation can be immediately stopped by closing the control valves 21. Conversely, when periodic testing or re-sampling is required after troubleshooting, the control valves 21 can be opened, making the sampling process more flexible and facilitating operation according to actual needs. In a preferred embodiment, by controlling the opening and closing of different numbers and locations of control valves 21, corresponding measurements of flue gas in different zones within the outlet flue 01 of the gas turbine waste heat boiler denitrification reactor can be performed.

[0054] The flue gas sampled from multiple sampling pipelines 2 is collected in the transmission pipeline 3, which is equipped with a detection and analysis component 4. The pretreatment module 41 includes a heating and filtration module, a cooling module, and a drying module installed in sequence. The cooling module is also connected to a condensate treatment module. The flue gas taken from the outlet flue 01 of the gas turbine waste heat boiler denitrification reactor often contains various impurities, such as dust, moisture, and oil droplets. The pretreatment module 41 can remove these impurities through filtration, dehumidification, and oil removal, making the flue gas sample entering the subsequent analysis instrument purer. The sampling pump 42 can provide stable power for the flow of the flue gas sample in the transmission pipeline 3, ensuring that the flue gas enters the flue gas analyzer 43 at an appropriate flow rate and pressure, avoiding analysis errors caused by unstable flow rate or pressure fluctuations. The flue gas analyzer 43 is the core part of the entire detection and analysis component 4. The pretreated pure flue gas and stable delivery conditions enable it to perform at its best, providing reliable data support for evaluating the combustion efficiency of the gas turbine waste heat boiler, the overall performance of the denitrification system, and environmental performance.

[0055] The specific steps of the detection and analysis component 4 are as follows: S1, extract the original flue gas sample through the sampling probe; S2, remove large particulate impurities through heating and filtration; S3, the sample enters the condenser to cool and condense water; S4, the condensate is discharged through the drainage device; S5, the dried sample gas is transported to the flue gas analyzer 43 for flue gas component detection.

[0056] The implementation principle of this application embodiment is as follows: Sampling units 1 are matrix-distributed within the outlet flue 01 of the gas turbine waste heat boiler denitrification reactor, and each sampling unit 1 has multiple sampling points 14 to cover different locations within the flue. Compared to single-point sampling, this allows for more comprehensive acquisition of information such as the composition, temperature, and pressure of the flue gas within the flue, avoiding data bias due to a single sampling point 14, and thus more accurately reflecting the true state of the flue gas within the entire flue. Simultaneously, since the flow field distribution within the outlet flue 01 of the gas turbine waste heat boiler denitrification reactor is often non-uniform, the matrix sampling system can detect different flow fields within the flue. Sampling is conducted in the field area to achieve matrix-style zonal measurement of flue gas composition in different areas within the outlet flue duct 01 of the gas turbine waste heat boiler denitrification reactor. This allows for understanding the zonal deviation of NOx in each zone, thus providing a reasonable data basis for denitrification optimization control. The setup of multiple sampling units 1 and sampling points 14 ensures that the entire sampling operation will not fail due to blockage, damage, or other malfunctions at a single sampling point 14. Even if some sampling points 14 encounter problems, other normal sampling points 14 can continue to operate, ensuring the normal operation of the system and improving the overall reliability and stability of the system.

[0057] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A matrix-type online sampling system for gas turbine waste heat boilers, installed on the outlet flue of the denitrification reactor of the gas turbine waste heat boiler, characterized in that, include: Sampling unit (1) is located in the outlet flue (01) of the gas turbine waste heat boiler denitrification reactor. Multiple units are provided, and multiple sampling points (14) are opened on each sampling unit (1). The sampling pipeline (2) is connected to the sampling unit (1), and the sampling pipeline (2) is installed on the outlet flue (01) of the gas turbine waste heat boiler denitrification reactor; The transmission pipeline (3) is connected to the sampling pipeline (2), and the transmission pipeline (3) is equipped with a detection and analysis component (4).

2. The matrix-type online sampling system for gas turbine waste heat boilers according to claim 1, characterized in that: The centerline of the outlet flue (01) of the gas turbine waste heat boiler denitrification reactor divides the outlet flue (01) of the gas turbine waste heat boiler denitrification reactor into a left flue zone (011) and a right flue zone (012). Both the left flue zone (011) and the right flue zone (012) are provided with one or more of the sampling units (1).

3. The matrix-type online sampling system for gas turbine waste heat boilers according to claim 2, characterized in that: The sampling unit (1) includes a first horizontal tube (11), a second horizontal tube (12) and a vertical tube (13). The two ends of the vertical tube (13) are respectively connected to the side walls of the first horizontal tube (11) and the second horizontal tube (12). The sampling pipeline (2) is connected to the side wall of the vertical tube (13). Both the first horizontal tube (11) and the second horizontal tube (12) are provided with multiple sampling points (14).

4. The matrix-type online sampling system for gas turbine waste heat boilers according to claim 3, characterized in that: The first horizontal tube (11) and the second horizontal tube (12) have the same length, and the ends of the first horizontal tube (11) and the second horizontal tube (12) are located on the same axis; The vertical tube (13) is located at the center of the first horizontal tube (11); or The vertical tube (13) is disposed near the end of the first horizontal tube (11).

5. The matrix-type online sampling system for gas turbine waste heat boilers according to claim 2, characterized in that: The sampling unit (1) located in the left zone (011) of the flue is located at the center of the left zone (011); the sampling unit (1) located in the right zone (012) of the flue is located at the center of the right zone (012).

6. The matrix-type online sampling system for gas turbine waste heat boilers according to claim 2, characterized in that: The number of detection units provided in the left zone (011) and the right zone (012) of the flue are the same.

7. The matrix-type online sampling system for gas turbine waste heat boilers according to claim 1, characterized in that: The opening of the sampling point (14) faces away from the direction of flue gas flow, and each sampling point (14) is provided with a detachable filter assembly (141).

8. The matrix-type online sampling system for gas turbine waste heat boilers according to claim 1, characterized in that: The sampling pipeline (2) is equipped with a control valve (21) located outside the outlet flue (01) of the gas turbine waste heat boiler denitrification reactor.

9. The matrix-type online sampling system for gas turbine waste heat boilers according to claim 1, characterized in that: The detection and analysis component (4) includes a pretreatment module (41), a sampling pump (42), and a flue gas analyzer (43), which are sequentially installed on the transmission pipeline (3).

10. The matrix-type online sampling system for gas turbine waste heat boilers according to claim 9, characterized in that: The pretreatment module (41) includes a heating and filtration module, a cooling module, and a drying module installed in sequence; The cooling module is also connected to a condensate treatment module.

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