Flue gas analysis device

Abstract

The utility model relates to a flue gas analysis device belongs to flue gas sampling technical field, wherein flue gas analysis device is used for analyzing the flue gas of multiple boilers, flue gas analysis device includes analysis appearance, sampling pipeline and switch valve, multiple sampling pipelines are arranged side by side with each other, multiple sampling pipelines are set up one to one with multiple boilers, multiple sampling pipelines are connected in the same analysis appearance, switch valve is arranged on sampling pipeline and is used for controlling the on-off of sampling pipeline, and a analysis appearance can only communicate with one sampling pipeline once. The flue gas analysis device provided by the utility model uses one analysis appearance to alternately analyze the flue gas of multiple boilers, reduces the number of required analysis appearance under the premise of guaranteeing the flue gas analysis demand, thereby reduces the cost of device whole, the occupied space, makes the analysis appearance only communicate one sampling pipeline once simultaneously, avoids the mutual interference of different boiler flue gas in the analysis process, and ensures the accuracy of single flue gas analysis data.

Description

Technical Field

[0001] This utility model belongs to the field of flue gas sampling technology, and in particular relates to a flue gas analysis device. Background Technology

[0002] A boiler is a device that converts the chemical energy or other energy of fuel into heat energy, used in chemical, heating, industrial power, and power generation fields. As national environmental regulations impose increasingly stringent requirements on industrial flue gas emission limits, key indicators such as NOx content and oxygen concentration in boiler flue gas must be monitored in real time and with precision before entering subsequent desulfurization and denitrification devices.

[0003] Currently, analyzers are typically used to analyze flue gas from boilers. Sampling pipelines are directly connected to the analyzers for parameter detection, and the monitoring data is ultimately transmitted to the control system. One analyzer can usually only analyze one sampling pipeline, but in actual production, boilers are often configured with multiple analyzers. If each boiler is equipped with only one analyzer, this not only increases monitoring costs but also increases the overall space occupied by the equipment. Furthermore, multiple analyzers operating in parallel also increases pipeline complexity.

[0004] Therefore, it is of great significance to design an analytical device that can perform flue gas analysis on multiple sampling pipelines. Utility Model Content

[0005] To address the shortcomings of related technologies, this utility model provides a flue gas analysis device that uses a single analyzer to alternately analyze the flue gas from multiple boilers. While ensuring the analysis needs of multiple boiler flue gas, it can reduce the number of analyzers required, thereby reducing the overall cost, space occupation, and subsequent maintenance costs of the device. At the same time, the analyzer is connected to only one sampling pipeline at a time, avoiding mutual interference between flue gas from different boilers during the analysis process and ensuring the accuracy of the flue gas analysis data for each analysis.

[0006] This utility model provides a flue gas analysis device for analyzing flue gas emitted from multiple boilers; the flue gas analysis device includes: Analyzer; The sampling pipeline is configured as multiple pipelines, which are arranged in parallel; multiple sampling pipelines are configured to correspond one-to-one with multiple boilers; multiple sampling pipelines are connected to the same analyzer; A switching valve, located on the sampling pipeline, is used to control the on / off state of the sampling pipeline; In this configuration, an analyzer can only be connected to one sampling line at a time; multiple sampling lines can be connected to the same analyzer alternately.

[0007] In this technical solution, by setting up one analyzer corresponding to multiple sampling pipelines, multiple boilers can be analyzed using the same analyzer, reducing the number of analyzers required and thus reducing the overall structural space occupied by the flue gas analysis device. Furthermore, it ensures that the flue gas from multiple boilers can be analyzed effectively and reliably. By installing switching valves on the sampling pipelines, one analyzer can analyze multiple sampling pipelines in turn, avoiding mutual interference between flue gas from different boilers during the analysis process and ensuring the accuracy of single flue gas analysis data.

[0008] In some embodiments, multiple switching valves are configured, with each switching valve corresponding to one of the multiple sampling pipelines.

[0009] In some embodiments, a probe is provided on the sampling pipeline for sampling flue gas from the boiler; when the sampling pipeline is connected to the analyzer, the probe samples the flue gas; when the sampling pipeline is disconnected from the analyzer, the probe stops sampling the flue gas.

[0010] In some embodiments, an air blowing box is also included, which is connected to an exhaust pipe. The end of the exhaust pipe away from the air blowing box is connected to the probe. The air blowing box blows air toward the probe through the exhaust pipe to prevent smoke from clogging the probe. When the air blowing box blows air toward the probe, the switching valve cuts off the sampling pipeline.

[0011] In some embodiments, the blowing box is also connected to the analyzer, and the blowing box blows air into the analyzer to remove the residual flue gas inside the analyzer. When the air blowing box blows air into the analyzer, the sampling line stops sampling.

[0012] In some embodiments, the exhaust pipe is connected to the sampling line, and the connection between the exhaust pipe and the sampling line is located on the sampling line between the switching valve and the probe. When the air blowing box blows air toward the probe, the switching valve cuts off the sampling line; when the air blowing box blows air toward the analyzer, the switching valve connects the sampling line.

[0013] In some embodiments, multiple air blowing boxes are configured, and multiple air blowing boxes are set up one-to-one with multiple probes through corresponding sampling pipelines.

[0014] In some embodiments, a controller is also included, which is electrically connected to the switching valve for controlling the switching valve to connect or disconnect the sampling pipeline; the controller is also electrically connected to the blowing box for controlling the blowing box to blow air.

[0015] In some embodiments, two sampling lines are configured, which are alternately connected to the analyzer.

[0016] In some embodiments, the analyzer is provided with an air inlet line connected to a three-way valve, which is also connected to two sampling lines.

[0017] Based on the above technical solution, in this embodiment of the utility model, the flue gas analysis device uses one analyzer to alternately analyze the flue gas from multiple boilers. While ensuring the flue gas analysis needs of multiple boilers are met, the number of analyzers required can be reduced, thereby reducing the overall cost, space occupied, and subsequent maintenance costs of the device. At the same time, the analyzer is connected to only one sampling pipeline at a time, avoiding mutual interference between flue gas from different boilers during the analysis process and ensuring the accuracy of the flue gas analysis data for each analysis. Attached Figure Description

[0018] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a schematic diagram of one embodiment of the flue gas analysis device of this utility model.

[0019] In the picture: 1. Analyzer; 2. Switching box; 3. Controller; 4. Blowing box; 5. Probe; 101. Sampling pipeline; 102. Intake pipeline; 103. Exhaust pipe; 104. Wiring; 21. Switching valve; 22. Three-way valve. Detailed Implementation

[0020] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0021] In the description of this utility model, it should be understood that the terms "center", "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] As attached Figure 1 As shown in an illustrative embodiment of the flue gas analysis device of this utility model, the flue gas analysis device is used to analyze the flue gas emitted by multiple boilers; the flue gas analysis device includes an analyzer 1, a sampling pipeline 101 and a switching valve 21; multiple sampling pipelines 101 are configured, and the multiple sampling pipelines 101 are arranged in parallel with each other; the multiple sampling pipelines 101 are arranged one-to-one with multiple boilers; the multiple sampling pipelines 101 are respectively connected to the same analyzer 1; the switching valve 21 is provided on the sampling pipeline 101 and is used to control the on / off state of the sampling pipeline 101.

[0025] It should be noted that an analyzer 1 can only be connected to one sampling pipeline 101 at a time to avoid mutual interference between different boiler flue gas during the analysis process, thus ensuring the accuracy of the flue gas analysis data for a single analysis.

[0026] It should also be noted that multiple sampling pipelines 101 are alternately connected to the same analyzer 1, so that one analyzer 1 can analyze multiple sampling pipelines 101 in turn, and multiple boilers can use the same analyzer 1 for analysis. While ensuring the flue gas analysis needs of multiple boilers, the number of analyzers 1 used is reduced, thereby reducing the overall cost of the device, space occupation and subsequent maintenance costs.

[0027] Furthermore, it should be noted that the specific structure and working principle of analyzer 1 are existing technologies in this field and will not be elaborated here.

[0028] In the above-mentioned flue gas analysis device, by setting one analyzer 1 and multiple sampling pipelines 101 correspondingly, and setting a switching valve 21 on the sampling pipelines 101, the single analyzer 1 can alternately analyze the flue gas of multiple boilers. This not only ensures that the flue gas of the boilers can be effectively and reliably analyzed and meets the flue gas analysis requirements, but also reduces the number of analyzers 1 required and reduces the overall structural space occupied by the flue gas analysis device.

[0029] like Figure 1 As shown, multiple switching valves 21 are configured, each corresponding to one of the multiple sampling pipelines 101 to ensure the accuracy of the switching valves 21 in controlling the sampling pipelines 101. When a switching valve 21 corresponding to a certain sampling pipeline 101 fails, only the faulty switching valve 21 needs to be repaired or replaced, without affecting the normal connection between other sampling pipelines 101 and analyzer 1, or the flue gas analysis work. This increases the stability of the entire device operation and reduces the overall downtime caused by equipment failure.

[0030] In some embodiments, a plurality of switching valves 21 are disposed within the switching box 2.

[0031] In some embodiments, such as Figure 1 As shown, a probe 5 is provided on the sampling pipeline 101. The probe 5 is used to sample the flue gas of the boiler. By setting the probe 5 on the sampling pipeline 101, it is convenient to sample the flue gas of the boiler.

[0032] It should be noted that probe 5 is existing technology in this field, and its working principle and specific structure will not be described in detail here.

[0033] Since the analyzer 1 is connected to the sampling pipeline 101 in turn, when the sampling pipeline 101 is connected to the analyzer 1, the probe 5 samples the flue gas; when the sampling pipeline 101 is disconnected from the analyzer 1, the probe 5 stops sampling the flue gas. This avoids invalid sampling by the probe 5 during non-analysis periods, reduces the contact time between the probe 5 and the flue gas, lowers the wear rate of the probe 5, and extends the service life of the probe 5. It also prevents the flue gas from stagnating and accumulating in the sampling pipeline 101 during non-analysis periods, avoiding contamination of newly sampled flue gas by stagnant flue gas during subsequent analysis, and further ensuring the accuracy of the flue gas analysis results.

[0034] like Figure 1 As shown, the above-mentioned flue gas analysis device also includes a blowing box 4, which is connected to an exhaust pipe 103. The blowing box 4 is connected to the probe 5 through the exhaust pipe 103. The blowing box 4 blows air towards the probe 5 through the exhaust pipe 103 to prevent the flue gas from clogging the probe 5.

[0035] By periodically or as needed, the air blowing box 4 blows air into the probe 5, which can remove impurities attached to the surface of the probe 5 or blocked at the inlet of the probe 5, ensuring that the probe 5 always maintains a smooth sampling channel. This avoids insufficient sampling volume, reduced sampling efficiency, or even failure to sample due to blockage of the probe 5, thus ensuring the continuity and stability of flue gas sampling work and reducing the frequency and cost of maintenance caused by blockage of the probe 5.

[0036] When the air blowing box 4 blows air towards the probe 5 through the exhaust pipe 103, the probe 5 stops sampling.

[0037] In some embodiments, such as Figure 1 As shown, the exhaust pipe 103 is connected to the sampling pipe 101. The connection between the exhaust pipe 103 and the sampling pipe 101 is located in front of the switching valve 21 along the flow direction of the flue gas in the sampling pipe 101. When the blowing box 4 blows air toward the probe 5, the switching valve 21 cuts off the sampling pipe 101 to ensure that the gas is reliably blown toward the probe 5.

[0038] In other embodiments, the exhaust pipe 103 may be connected directly to the probe 5 without passing through the sampling pipe 101.

[0039] like Figure 1 As shown, multiple air-blowing boxes 4 are configured, and each air-blowing box 4 corresponds to a specific probe 5 via a corresponding sampling pipeline 101. Each air-blowing box 4 blows air only onto its corresponding probe 5, allowing the air-blowing box 4 to select the timing, intensity, and duration of blowing according to the actual blockage of different probes 5. Compared to one air-blowing box 4 corresponding to multiple probes 5, the blowing effect is more targeted, ensuring that each probe 5 is effectively cleaned and avoiding energy waste or damage to some probes 5 due to excessive backflushing caused by uniform blowing.

[0040] Since the analyzer 1 is connected to the sampling pipeline 101 in turn, and different sampling pipelines 101 are used to collect flue gas from different boilers, and the flue gas from different boilers is not exactly the same, in order to ensure the accuracy of the flue gas sampling results, the analyzer 1 needs to be purified after analyzing the flue gas sampled by the current sampling pipeline 101, so as not to affect the analysis of the flue gas sampled by the next sampling pipeline 101.

[0041] In some embodiments of this application, the air blowing box 4 is also used to purify the analyzer 1; the air blowing box 4 is connected to the analyzer 1 through a pipeline, and the air blowing box 4 blows air into the analyzer 1 to empty the residual flue gas in the analyzer 1.

[0042] It should be noted that when the blowing box 4 blows air into the analyzer 1, the probe 5 stops sampling the flue gas, and the corresponding switching valve 21 connects to the sampling pipeline 101.

[0043] In some embodiments, the gas blown out of the air blowing box 4 passes through the exhaust pipe 103 and the sampling pipe 101 in sequence and is blown towards the analyzer 1 to purify the analyzer 1 and empty the sampling pipe 101 and the residual flue gas in the analyzer 1.

[0044] Since the connection between the exhaust pipe 103 and the sampling pipeline 101 is located in front of the switching valve 21, when the air blowing box 4 blows air toward the analyzer 1, the switching valve 21 connects the sampling pipeline 101 so that the gas can be reliably blown toward the analyzer 1.

[0045] In other embodiments, the blowing box 4 may also be additionally connected to the analyzer 1 via a pipeline so that the gas blown out of the blowing box 4 is blown directly to the analyzer 1 without passing through the sampling pipeline 101.

[0046] It should be noted that the gas blown out by the air blowing box 4 can be atmospheric air or nitrogen, etc.

[0047] It should also be noted that the air blowing path from the air blowing box 4 to the probe 5 and to the analyzer 1 is opposite. In some embodiments, the switching valve 21 is a valve body that allows bidirectional flow (such as a ball valve, butterfly valve, etc.) to realize the reverse purging function of the air blowing box 4 to the analyzer 1.

[0048] In addition, it should be noted that in some embodiments, when the probe 5 stops sampling the flue gas, the end of the probe 5 connected to the sampling pipeline 101 is in a closed state to prevent the flue gas from entering the sampling pipeline 101 for unnecessary sampling.

[0049] In other embodiments of this application, a purification pipeline is provided to blow air into the analyzer 1 to purify the analyzer 1 and avoid affecting the analysis of the flue gas sampled by the next sampling pipeline 101.

[0050] Specifically, one end of the purification pipeline is connected to the air, and the other end of the purification pipeline is connected to the analyzer 1; the purification pipeline is equipped with a switch valve, which is used to control the opening and closing of the purification pipeline; after the analyzer 1 finishes analyzing the flue gas sampled by a sampling pipeline 101, the purification pipeline blows air into the analyzer 1.

[0051] In the above-mentioned flue gas analysis device, by blowing air into the air box 4 or the purification pipeline during the interval between two different boiler flue gas analyses, the residual flue gas from the previous analysis inside the analyzer 1 is removed, thus avoiding interference from the residual flue gas from the previous analysis on the results of the next analysis of different boiler flue gas, and improving the accuracy and reliability of the data during continuous alternating analysis.

[0052] like Figure 1 As shown, the flue gas analysis device also includes a controller 3. The controller 3 is electrically connected to the switching valve 21 via line 104 and is used to control the switching valve 21 to connect or disconnect the sampling pipeline 101. The controller 3 is also electrically connected to the blowing box 4 via line 104 and is used to control the blowing of air by the blowing box 4.

[0053] By electrically connecting the controller 3 to the switching valve 21 and the blowing box 4 respectively, the intelligent and automated flue gas analysis can be realized. The controller 3 can also realize functions such as timed switching and on-demand switching of the connection between the sampling pipeline 101 and the analyzer 1 through the preset program or linkage with other control systems, thereby improving the overall automation level and operating efficiency of the device.

[0054] It should be noted that when the controller 3 controls the air blowing box 4 to blow air towards the probe 5, the controller 3 controls the switching valve 21 to cut off the sampling pipeline 101. This ensures the effective blowing of the air blowing box 4 towards the probe 5 and prevents impurities clogging the probe 5 from entering the analyzer 1 through the sampling pipeline 101, thus ensuring the safe operation and analytical accuracy of the analyzer 1. It also avoids interference with the normal sampling pipeline 101 during the air blowing process from the air blowing box 4 towards the probe 5. When the controller 3 controls the air blowing box 4 to blow air towards the analyzer 1, the controller 3 controls the switching valve 21 to connect the sampling pipeline 101, so that the gas blown out by the air blowing box 4 can be directed towards the analyzer 1.

[0055] It should also be noted that the control logic of the controller 3 for the switching valve 21 and the air blowing box 4 is a conventional technical means in this field, and will not be elaborated here.

[0056] In some embodiments, the controller 3 is also electrically connected to the analyzer 1 via line 104.

[0057] In other embodiments, the analyzer 1 can complete a flue gas analysis every 5 minutes, and the analyzer 1 can change the connection of a sampling pipeline 101 every 5 minutes.

[0058] In some embodiments, two sampling pipelines 101 are provided, and one analyzer 1 is provided. The two sampling pipelines 101 are alternately connected to one analyzer 1. The analyzer 1 can be set between two boilers, which not only facilitates the arrangement of the analyzer 1, but also shortens the analysis interval time of the analyzer 1 for the flue gas of the same boiler, thereby improving the overall flue gas analysis efficiency.

[0059] like Figure 1 As shown, the analyzer 1 is equipped with an air inlet pipe 102, which is connected to a three-way valve 22. The three ports of the three-way valve 22 are respectively connected to the air inlet pipe 102 and two sampling pipes 101. This not only reduces the number of pipe connection nodes and the risk of air leakage at the pipe connection, but also avoids the problem of flue gas loss or outside air entering and affecting the analysis results due to air leakage. It also improves the sealing of the pipe connection and the reliability of switching, and ensures the stable operation of the dual-pipeline alternating analysis mode.

[0060] It should be noted that in some embodiments, when the intake pipe 102 is connected to the two sampling pipes 101 through the three-way valve 22, the switching valve 21 may not be provided on the two sampling pipes 101.

[0061] It should also be noted that components such as fans or sampling pumps can be installed in the sampling pipeline 101 to provide the power required for the flue gas to flow in the sampling pipeline 101. This is a conventional technical means in the field and will not be described in detail here.

[0062] Through the description of several embodiments of the flue gas analysis device of this utility model, it can be seen that the embodiments of the flue gas analysis device of this utility model have at least one or more of the following advantages: 1. By setting multiple sampling pipelines 101 to correspond with the same analyzer 1, and setting multiple sampling pipelines 101 to correspond one-to-one with multiple boilers, a single analyzer 1 can analyze the flue gas of multiple boilers, thereby saving the number of analyzers 1 and reducing the analysis cost.

[0063] 2. By setting a switching valve 21 on each sampling pipeline 101 and controlling the switching valve 21 to connect or disconnect the sampling pipeline 101, the analyzer 1 can analyze the flue gas sampled from multiple sampling pipelines 101 in turn. This avoids the flue gas from multiple boilers interfering with each other and affecting the accuracy of the analysis results.

[0064] 3. By setting up the air blowing box 4, the air blowing box 4 blows air onto the probe 5 to prevent the flue gas from clogging the probe 5, and the air blowing box 4 blows air onto the analyzer 1 to purify the analyzer 1, so as to prevent the residual flue gas from the previous analysis from affecting the results of the next flue gas analysis and to ensure the accuracy of the flue gas analysis results.

[0065] 4. By setting the controller 3 to control the operation of the switching valve 21 and the blowing box 4, the automation and intelligence of flue gas analysis can be realized, thereby improving the efficiency of flue gas analysis.

[0066] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0067] The above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A flue gas analysis device for analyzing flue gas emitted from multiple boilers; characterized in that, The flue gas analysis device includes: Analyzer; The sampling pipeline is configured as multiple pipelines, which are arranged in parallel with each other; each sampling pipeline corresponds to one of the multiple boilers; and the multiple sampling pipelines are connected to the same analyzer. A switching valve, which is located on the sampling pipeline, is used to control the on / off state of the sampling pipeline; In this configuration, one of the analyzers can only be connected to one of the sampling lines at a time; multiple sampling lines can be connected to the same analyzer alternately.

2. The flue gas analysis device according to claim 1, characterized in that, The switching valve is configured in multiple ways, and each of the multiple switching valves corresponds to one of the multiple sampling pipelines.

3. The flue gas analysis device according to claim 1, characterized in that, The sampling pipeline is equipped with a probe for sampling the flue gas from the boiler. When the sampling pipeline is connected to the analyzer, the probe samples the flue gas. When the sampling pipeline is disconnected from the analyzer, the probe stops sampling the flue gas.

4. The flue gas analysis device according to claim 3, characterized in that, It also includes an air blowing box, which is connected to an exhaust pipe. The end of the exhaust pipe away from the air blowing box is connected to the probe. The air blowing box blows air toward the probe through the exhaust pipe to prevent smoke from clogging the probe. When the air blowing box blows air toward the probe, the switching valve cuts off the sampling pipeline.

5. The flue gas analysis device according to claim 4, characterized in that, The blowing box is also connected to the analyzer, and the blowing box blows air into the analyzer to expel the residual flue gas inside the analyzer; When the air blowing box blows air toward the analyzer, the sampling pipeline stops sampling.

6. The flue gas analysis device according to claim 5, characterized in that, The exhaust pipe is connected to the sampling pipeline, and the connection point between the exhaust pipe and the sampling pipeline is located on the sampling pipeline between the switching valve and the probe. When the air blowing box blows air toward the analyzer, the switching valve connects to the sampling pipeline.

7. The flue gas analysis device according to claim 4, characterized in that, The air blowing box is configured in multiple ways, and the multiple air blowing boxes are configured in one-to-one correspondence with the multiple probes through the corresponding sampling pipelines.

8. The flue gas analysis device according to claim 4, characterized in that, It also includes a controller, which is electrically connected to the switching valve and is used to control the switching valve to connect or disconnect the sampling pipeline; the controller is also electrically connected to the air blowing box and is used to control the air blowing box to blow air.

9. The flue gas analysis device according to claim 1, characterized in that, The sampling pipeline is configured as two lines, and the analyzer is configured as one unit. The two sampling pipelines are alternately connected to the analyzer.

10. The flue gas analysis device according to claim 9, characterized in that, The analyzer is equipped with an air inlet pipe, which is connected to a three-way valve, and the three-way valve is also connected to two sampling pipes.

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