Boiler flue gas emission on-line monitoring analyzer

Abstract

The present application relates to the field of flue gas analysis, in particular to a kind of boiler flue gas emission on-line monitoring analyzer, the present application includes shell, detection passage is equipped in shell, detection passage is communicated two sides of shell, first telescopic rod is equipped at the top of detection passage, installation seat is equipped at the bottom of first telescopic rod, gas analyzer is equipped at the bottom of installation seat, protection shell is slidably connected in both sides of installation seat, the drive part for driving protection shell sliding is equipped at the bottom of installation seat;Detection passage bottom is equipped with conveying assembly, conveying assembly is equipped with collection belt, a plurality of grooves are equipped on collection belt, plate body is detachably connected in the groove, handle body is equipped on plate body, conveying assembly is used to drive collection belt to move.The technical scheme of the present application, by the protection shell that can be opened and closed, reduce the influence of gas analyzer by flue gas, and utilize protection shell to assist the collection of sample.

Description

Technical Field

[0001] This invention relates to the field of flue gas analysis technology, and more specifically, to an online monitoring and analysis instrument for boiler flue gas emissions. Background Technology

[0002] Gas-fired boiler flue gas emission monitoring devices are crucial equipment for real-time monitoring and control of flue gas emissions from gas-fired boilers. These devices use sensors installed in the boiler's exhaust pipes to collect real-time data on pollutant concentrations in the flue gas and transmit the data to a central processing unit for analysis and processing. The system can display pollutant concentrations in real time and issue alarms based on preset standards, ensuring that pollutant emissions remain within legally permissible limits.

[0003] Existing sensors generally suffer from the following problems: First, the high temperature of flue gas causes the sensor to heat up during long-term monitoring, leading to thermal drift in the monitoring data. Second, flue gas contains a large amount of particulate matter, which adheres to the probe, affecting the contact between the probe and the flue gas and reducing detection accuracy. Furthermore, the sensor is located inside the flue, and the state of the flue is not easily obtained, making it difficult to detect when monitoring accuracy deteriorates. Therefore, a monitoring and analysis instrument is needed that reduces the impact of thermal drift and particulate matter adhesion, and minimizes the influence of low-precision data. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides an online monitoring and analysis instrument for boiler flue gas emissions. This instrument uses an openable and closable protective casing to reduce the influence of flue gas on the gas analyzer and to assist in the verification of sample collection.

[0005] This invention is achieved through the following technical solution: an online monitoring and analysis instrument for boiler flue gas emissions, comprising a housing, a detection channel inside the housing, the detection channel connecting both sides of the housing, a first telescopic rod at the top of the detection channel, a mounting base at the bottom of the first telescopic rod, a gas analyzer at the bottom of the mounting base, protective shells slidably connected to both sides of the mounting base, and a driving component at the bottom of the mounting base for driving the protective shells to slide. The protective shells are used to form a closed cavity to accommodate the gas analyzer by closing, and the protective shells are used to reduce the direct contact time between the gas analyzer and the flue gas by intermittent closing. The bottom of the detection channel is equipped with a conveyor assembly, which has a collection belt. The collection belt has several grooves, each of which is detachably connected to a plate. The plate has a handle. The conveyor assembly is used to drive the collection belt to move. The protective shell is used to clamp the handle by closing it, and the plate is removed from or inserted into the groove by using the first telescopic rod through the clamped handle.

[0006] Furthermore, the handle has a T-shaped structure.

[0007] Furthermore, the bottom of the protective shell is equipped with claws, rubber pads are provided on the claws, and a ladder groove is opened on the inner side of the claws.

[0008] Furthermore, a cover shell is fixedly connected to the bottom of the detection channel. The cover shell is located above the transmission component, and an interaction hole is provided on the cover shell, which is located below the protective shell.

[0009] Furthermore, a sliding groove is provided on the inner side of the cover, which engages with the handle.

[0010] Furthermore, absorbent cotton is fixedly connected inside the groove, and a magnetic sheet is provided at the bottom of the plate.

[0011] Furthermore, the plate body is provided with several air storage chambers, the top of the handle body is provided with an air injection port, the air injection port is provided with a one-way valve, the top of the detection channel is fixedly connected with a second telescopic rod, the second telescopic rod is fixedly connected with an air injection needle, and the air injection needle is connected to an air pump.

[0012] Furthermore, both the first and second telescopic rods are fitted with elastic sleeves.

[0013] Furthermore, a rod is fixedly connected to one end of the collection belt.

[0014] The technical solution of the present invention has at least the following beneficial effects: In this design, the gas analyzer is housed in a protective enclosure, which can be opened and closed by a drive mechanism. The protective enclosure switches between closed and open states to intermittently detect gas.

[0015] When the protective casing is open, flue gas enters, and the gas analyzer detects and analyzes the gas content within it. When the protective casing is closed, flue gas cannot enter. Because the casing constantly switches between opening and closing states, the contact between the flue gas and the gas analyzer is reduced, thus minimizing the interference from temperature variations and particulate matter buildup on the analyzer.

[0016] However, with prolonged use, temperature fluctuations and the accumulation of particulate matter can lead to a decrease in the detection accuracy of the gas analyzer. Furthermore, while intermittent detection by the gas analyzer can cover most application scenarios, it results in the loss of data for certain time periods. Therefore, a sampling strip is incorporated. The sampling strip collects samples of the flue gas. Multiple grooves on the sampling strip are directly exposed to the flue gas after the plate is removed, allowing particulate matter in the flue gas to adhere. When the plate is replaced, it covers the grooves, preventing further adhesion of particulate matter in the flue gas. Utilizing this characteristic, each groove can record the flue gas conditions over a period of time. By subsequently removing the sampling strip and analyzing it in the laboratory, the composition can be determined, thereby assessing whether the gas analyzer's detection accuracy has decreased.

[0017] Since the plate needs to be removed and inserted, a mechanism is required to perform these actions. The protective shell is controlled to open and close via a drive mechanism and is suspended within the detection channel, thus allowing for the addition of a first telescopic rod to move the protective shell. Extending the first telescopic rod lowers the protective shell, allowing it to clamp the handle on the plate when closed. Retracting the first telescopic rod removes the plate from the groove. The conveyor assembly drives the collection belt to move and switch the grooves at the bottom of the protective shell, allowing the protective shell to remove a plate from an unattached groove and place it into a properly attached groove.

[0018] In this solution, the amount of flue gas that the gas analyzer comes into contact with is controlled by a protective shell that can be opened and closed. At the same time, the protective shell can also operate the sampling belt to assist in the collection of flue gas particulate matter samples, so as to facilitate subsequent verification of detection accuracy and acquisition of collection information during gap periods. Attached Figure Description

[0019] Figure 1 This is an isometric schematic diagram of an embodiment of the boiler flue gas emission online monitoring and analysis instrument of the present invention; Figure 2 This is a front view schematic diagram of an embodiment of the online monitoring and analysis instrument for boiler flue gas emissions of the present invention; Figure 3 This is a cross-sectional schematic diagram of the protective shell of an embodiment of the online monitoring and analysis instrument for boiler flue gas emissions of the present invention; Figure 4 This is a top view schematic diagram of the interactive hole in an embodiment of the online monitoring and analysis instrument for boiler flue gas emissions of the present invention; Figure 5 This is a side-view cross-sectional schematic diagram of the casing of an embodiment of the online monitoring and analysis instrument for boiler flue gas emissions of the present invention; Figure 6 This is a side-view cross-sectional schematic diagram of the protective shell of an embodiment of the boiler flue gas emission online monitoring and analysis instrument of the present invention; Figure 7 This is a side view of the outer side of the casing of an embodiment of the boiler flue gas emission online monitoring and analysis instrument of the present invention.

[0020] Reference numerals: 1. Housing; 2. Detection channel; 3. First telescopic rod; 4. Mounting base; 5. Gas analyzer; 6. Protective shell; 7. Drive component; 8. Conveying assembly; 9. Collection belt; 10. Groove; 11. Plate; 12. Handle; 13. Claw; 14. Ladder groove; 15. Cover shell; 16. Interactive hole; 17. Slide groove; 18. Absorbent cotton; 19. Gas injection port; 20. Second telescopic rod; 21. Gas injection needle; 22. Air pump; 23. Rod body. Detailed Implementation

[0021] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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 the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 mechanical connection or an electrical 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 invention based on the specific circumstances.

[0024] The following detailed description illustrates the specific implementation method: Example 1 As attached Figures 1-7 As shown, an online monitoring and analysis instrument for boiler flue gas emissions includes a housing 1. A detection channel 2 is provided inside the housing 1, connecting both sides of the housing 1. A first telescopic rod 3 is bolted to the top of the detection channel 2, and a mounting base 4 is bolted to the bottom of the first telescopic rod 3. A gas analyzer 5 is screwed to the bottom of the mounting base 4. The gas analyzer 5 detects sulfur dioxide, nitrogen oxides, oxygen, and humidity. Protective shells 6 are slidably connected to both sides of the mounting base 4. A driving component 7, a push-pull rod driven by a bidirectional screw with positive and negative threads, is provided at the bottom of the mounting base 4 to drive the protective shells 6 to slide. The protective shell 6 is used to create a closed cavity to accommodate the gas analyzer 5 by closing intermittently, reducing the direct contact time between the gas analyzer 5 and the flue gas. A heat insulation layer is bonded and fixed inside the protective shell 6, and a rod body 23 is bolted to one end of the sampling belt 9.

[0025] The bottom of the detection channel 2 is equipped with a conveyor assembly 8, which is a belt-type conveyor belt. The conveyor assembly 8 is equipped with a collection belt 9, which is equipped with several grooves 10. Each groove 10 is detachably connected to a plate 11. A handle 12 is integrally formed on the plate 11. The conveyor assembly 8 is used to drive the collection belt 9 to move.

[0026] The protective shell 6 is used to clamp the handle 12 by closing it, and to use the first telescopic rod 3 to remove or insert the plate 11 from the groove 10 through the clamped handle 12.

[0027] When in use, the casing 1 is placed in the flue. When the boiler is running, the flue gas emitted will enter the detection channel 2 through the flue.

[0028] The gas analyzer 5 is housed in the protective housing 6, which can be opened and closed by the drive component 7. In this design, the protective housing 6 switches between closed and open states to intermittently detect gas. The switching interval between closed and open states is controlled between 10s and 60s.

[0029] When the protective housing 6 is open, flue gas enters it, and the gas analyzer 5 detects and analyzes the gas content within it. When the protective housing 6 is closed, flue gas cannot enter. Because the protective housing 6 continuously switches between open and closed states, the contact between the flue gas and the gas analyzer 5 is reduced, thus minimizing the interference from temperature variations and particulate matter on the gas analyzer 5. The protective housing 6 also has an insulation layer, making it more difficult for heat changes in the detection channel 2 to be transferred into the protective housing 6, further reducing the temperature impact on the gas analyzer 5.

[0030] However, with long-term use, the effects of temperature and the accumulation of particulate matter will still lead to a decrease in the detection accuracy of the gas analyzer 5. It is necessary to calibrate it at regular intervals. Although the intermittent detection of the gas analyzer 5 can cover most usage scenarios, it will lose data for some time periods.

[0031] Therefore, a sampling belt 9 is set up. The function of the sampling belt 9 is to collect the attached samples of flue gas as the basis for analysis during calibration. Under normal circumstances, the plate 11 covers the grooves 10, preventing the flue gas from contacting the bottom of the grooves 10. After the plate 11 is removed, the multiple grooves 10 on the sampling belt 9 are directly exposed to the flue gas, where particulate matter in the flue gas adheres. When the plate 11 is replaced, it covers the grooves 10 again, preventing the re-attachment of particulate matter in the flue gas. Utilizing this characteristic, each groove 10 can record the flue gas conditions over a period of time. By subsequently removing the sampling belt 9 and taking it to the laboratory for analysis, the composition can be determined. By comparing the data with the data collected by the gas analyzer 5 at the corresponding time period, it can be determined whether the accuracy of the gas analyzer 5 has decreased.

[0032] Since the plate 11 needs to be removed and inserted, a mechanism is required to perform this action. In this embodiment, the insertion is performed by the protective shell 6, which is controlled to open and close by the drive component 7 and is suspended within the detection channel 2. Therefore, a first telescopic rod 3 can be added to drive the movement of the protective shell 6. When the first telescopic rod 3 extends, the protective shell 6 can be lowered so that when the protective shell 6 is closed, it can clamp the handle 12 on the plate 11. When the first telescopic rod 3 retracts, the protective shell 6 can clamp the plate 11 out. With the plate 11 suspended in the detection channel 2, the conveying component 8 can drive the collection belt 9 to move, switching the groove 10 located below the protective shell 6. Then, when the plate 11 is lowered again, it can be placed in another groove 10. Therefore, initially, no plate 11 is placed in the first groove 10 of the collection belt 9, and it is directly exposed to the flue gas. After the exposure time reaches a certain value (1-3 days), the particulate matter in the flue gas will adhere to the groove 10 and form a thin layer. The conveying component 8 then conveys the next groove 10, moving it below the protective shell 6. The protective shell 6 lowers and clamps the plate 11 inside. Then, the conveying component 8 drives the collection belt 9 to move, so that the groove 10 with the attached particulate matter returns to below the protective shell 6. The protective shell 6 lowers and places the plate 11 into the groove 10 covered with particulate matter. In this way, the plate 11 will cover the groove 10, and no new particulate matter will reach the bottom of the groove 10. At the same time, the plate 11 in another groove 10 is removed, and the particulate matter can then adhere to that groove 10. After the subsequent exposure time reaches a certain value, the above process is repeated, and particulate matter samples can be collected from each groove 10 on the collection belt 9.

[0033] A rod 23 is bolted to one side of the collection belt 9. The rod 23 extends out of the housing 1, allowing the user to directly pull out the collection belt 9 using the rod 23, and then analyze the sample on the collection belt 9.

[0034] In this embodiment, the amount of flue gas contacted by the gas analyzer 5 is controlled by the protective shell 6, which can be opened and closed, while the sampling belt 9 is operated to collect flue gas particulate matter samples, so as to facilitate subsequent verification of detection accuracy and acquisition of collection information during gap periods.

[0035] Example 2 The difference from the above embodiment is that the handle 12 has a T-shaped structure. The bottom of the protective shell 6 is integrally formed with a claw 13, and a rubber pad is glued and fixed on the claw 13. A stepped groove 14 is opened on the inner side of the claw 13.

[0036] To improve the stability of the protective shell 6 during clamping, the bottom of the protective shell 6 can extend into a claw 13, and the rubber pad on the claw 13 can increase the friction during clamping. At the same time, the handle 12 has a T-shaped structure with a protruding head at the top and a stepped groove 14 on the inner side of the claw, which can lock the head when gripping, thereby improving the stability of clamping and making it less likely for the plate 11 to fall off.

[0037] Example 3 The difference from the above embodiment is that a cover shell 15 is installed at the bottom of the detection channel 2, the cover shell 15 is located above the conveying assembly 8, and an interaction hole 16 is provided on the cover shell 15, which is located below the protective shell 6. A sliding groove 17 is provided on the inner side of the cover shell 15, and the sliding groove 17 engages with the handle 12. A magnetic suction piece is provided at the bottom of the plate 11.

[0038] The conveyor assembly 8 and the collection belt 9 can be hidden inside the bottom of the detection channel 2. The groove 10 where the operation and collection need to be performed is exposed through the interaction hole 16. This can prevent particles from adhering to other areas of the collection belt 9 and constrain the position of the collection belt 9, making it less likely for the collection belt 9 to be misaligned. At the same time, there are fewer particles adhering to the conveyor belt, reducing the maintenance cost of the conveyor assembly 8.

[0039] The magnetic sheet allows the plate 11 to adhere to the bottom of the groove 10 through magnetic attraction, making it less likely for the plate 11 to fall out of the groove 10.

[0040] Example 4 The difference from the above embodiment is that an absorbent cotton 18 is adhered and fixed in the groove 10, several air storage chambers are provided in the plate body 11, an air injection port 19 is opened at the top of the handle body 12, a one-way valve is provided in the air injection port 19, a second telescopic rod 20 is fixedly connected to the top of the detection channel 2, an air injection needle 21 is fixedly connected to the second telescopic rod 20, the air injection needle 21 is connected to an air pump 22, and a filter screen is provided at the air inlet of the air pump 22. Both the first telescopic rod 3 and the second telescopic rod 20 are covered with elastic sleeves.

[0041] The absorbent cotton 18 enhances the adhesion efficiency of particulate matter in the flue gas, facilitating the collection of more samples and thus enabling component analysis. Simultaneously, the plate 11 stores the flue gas during the exposure time of the groove 10, facilitating subsequent gas component analysis and verification of gas component detection accuracy. The plate 11 contains multiple gas storage chambers. During gas storage, the exposure time is divided into several segments, each segment infused with gas via the air pump 22 and the gas injection needle 21. Both the gas injection needle 21 and the gas injection port 19 have multiple orifices, with the orifices facing each other. Each orifice of the gas injection port 19 connects to a different gas storage chamber. By controlling the orifice through which the gas is discharged from the gas injection needle 21, the gas storage chamber into which gas is injected is switched.

[0042] Since particulate matter has been collected by adhering to the groove 10, the air pump 22 can filter out the particulate matter in advance when it is intake, thereby reducing the probability of blockage of the air pump 22 and the air injection needle 21. Simultaneously, since the plate 11 covered by the groove 10 after exposure comes from the next groove 10, the air injection needle 21 driven by the second telescopic rod 20 can be set at the top of the detection channel 2. The second telescopic rod 20 can extend to insert the air injection needle 21 into the plate 11 in the next groove 10, injecting air for the plate 11 subsequently placed in the groove 10 while the groove 10 is exposed. Obviously, the above embodiments are merely examples for clear illustration and are not intended to limit the implementation. For those skilled in the art, other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all embodiments here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. An online monitoring and analysis instrument for boiler flue gas emissions, characterized in that, Includes a housing (1), a detection channel (2) is provided inside the housing (1), the detection channel (2) connects the two sides of the housing (1), a first telescopic rod (3) is provided at the top of the detection channel (2), a mounting base (4) is provided at the bottom of the first telescopic rod (3), a gas analyzer (5) is provided at the bottom of the mounting base (4), a protective shell (6) is slidably connected to both sides of the mounting base (4), a driving component (7) for driving the protective shell (6) to slide is provided at the bottom of the mounting base (4), the protective shell (6) is used to construct a closed cavity to accommodate the gas analyzer (5) by closing, and the protective shell (6) is used to reduce the direct contact time between the gas analyzer (5) and the flue gas by intermittent closing; The bottom of the detection channel (2) is provided with a conveying component (8), the conveying component (8) is provided with a collection belt (9), the collection belt (9) is provided with several grooves (10), and each groove (10) is detachably connected with a plate (11), the plate (11) is provided with a handle (12), and the conveying component (8) is used to drive the collection belt (9) to move; The protective shell (6) is used to clamp the handle (12) by closing it, and to use the first telescopic rod (3) to remove or insert the plate (11) from the groove (10) through the clamped handle (12).

2. The online monitoring and analysis instrument for boiler flue gas emissions according to claim 1, characterized in that, The handle (12) has a T-shaped structure.

3. The online monitoring and analysis instrument for boiler flue gas emissions according to claim 2, characterized in that, The bottom of the protective shell (6) is provided with a claw (13), a rubber pad is provided on the claw (13), and a ladder groove (14) is provided on the inner side of the claw (13).

4. The online monitoring and analysis instrument for boiler flue gas emissions according to claim 3, characterized in that, The bottom of the detection channel (2) is fixedly connected to a cover shell (15), which is located above the transmission component (8). An interaction hole (16) is provided on the cover shell (15), which is located below the protective shell (6).

5. The online monitoring and analysis instrument for boiler flue gas emissions according to claim 4, characterized in that, The inner side of the cover shell (15) is provided with a sliding groove (17), which engages with the handle (12).

6. The online monitoring and analysis instrument for boiler flue gas emissions according to claim 5, characterized in that, An absorbent cotton (18) is fixedly connected inside the groove (10), and a magnetic sheet is provided at the bottom of the plate (11).

7. The online monitoring and analysis instrument for boiler flue gas emissions according to claim 6, characterized in that, The plate (11) has several air storage chambers, and the top of the handle (12) has an air injection port (19). The air injection port (19) has a one-way valve. The top of the detection channel (2) is fixedly connected to a second telescopic rod (20). The second telescopic rod (20) is fixedly connected to an air injection needle (21). The air injection needle (21) is connected to an air pump (22).

8. The online monitoring and analysis instrument for boiler flue gas emissions according to claim 7, characterized in that, Both the first telescopic rod (3) and the second telescopic rod (20) are fitted with elastic sleeves.

9. The online monitoring and analysis instrument for boiler flue gas emissions according to claim 8, characterized in that, The protective shell (6) has a heat insulation layer inside.

10. The online monitoring and analysis instrument for boiler flue gas emissions according to claim 9, characterized in that, One end of the collection belt (9) is fixedly connected to a rod (23).

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