SO2 accurate measuring device of desulfurization CEMS instrument

Abstract

The invention provides an accurate SO2 measuring device of a desulfurization CEMS instrument. The invention discloses an accurate SO2 measuring device for a desulfurization CEMS instrument. The accurate SO2 measuring device comprises a flue gas sampling device; the heat tracing sampling pipeline is arranged on one side of the top of the flue gas sampling device, and a quartz sampling probe tube is arranged at the top of the heat tracing sampling pipeline through a flange. According to the accurate SO2 measuring device of the desulfurization CEMS instrument, the stainless steel filter pipe is installed at the top of the outer surface of the quartz sampling probe pipe, the filter plate is arranged at the top of the stainless steel filter pipe and used for filtering dust particles in flue gas, and the cleaning device utilizes airflow driven by the air pump to be guided to the surface of the filter plate through the spray head; dust particles accumulated on the surface of the filter plate are cleaned and prevented from being blocked on the surface of the filter plate, so that the filtering effect and the service life of the filter plate are guaranteed, the frequency of dismounting and cleaning by operators is reduced, and the working efficiency of equipment is improved.

Description

Technical Field

[0001] This invention relates to the field of flue gas emission monitoring technology, and in particular to an accurate SO2 measuring device for a desulfurization CEMS instrument. Background Technology

[0002] Continuous emission monitoring systems (CEMS) are core equipment for enterprise pollution monitoring and environmental protection department supervision. The accuracy of SO2 concentration measurement is directly related to the validity and compliance of pollution data.

[0003] During the operation of the desulfurization system, the flue gas at the outlet of the desulfurization tower has the characteristics of high humidity, high dust, and various acidic interfering gases, which leads to many defects in the SO2 measurement of traditional CEMS instruments, making it difficult to meet the needs of accurate monitoring.

[0004] Dust pollution has a significant impact on flue gas pretreatment. Although a filter screen is installed on the outer surface of the sampling probe tube to filter dust, residual desulfurized gypsum dust (CaSO4) in the flue gas easily adheres to the surface of the filter screen. As the usage time increases, it affects the filtration of the filtration equipment, requiring operators to frequently disassemble and clean it, which affects work efficiency.

[0005] Therefore, it is necessary to provide a desulfurization CEMS instrument for accurate SO2 measurement to solve the above-mentioned technical problems. Summary of the Invention

[0006] This invention provides an accurate SO2 measuring device for desulfurization CEMS instruments, which solves the problem that dust pollution has a significant impact on flue gas pretreatment. Although a filter screen is set on the outer surface of the sampling probe tube to filter dust, the residual desulfurization gypsum dust (CaSO4) in the flue gas easily adheres to the surface of the filter screen. As the usage time increases, it affects the filtration of the filtration equipment, requiring operators to frequently disassemble and clean it, which affects work efficiency.

[0007] To solve the above-mentioned technical problems, the present invention provides an accurate SO2 measurement device for a desulfurization CEMS instrument, comprising: a flue gas sampling device;

[0008] A heat tracing sampling pipeline is provided on one side of the top of the flue gas sampling device, and a quartz sampling probe tube is provided on the top of the heat tracing sampling pipeline through a flange.

[0009] A stainless steel filter tube is disposed at one end of the outer surface of the quartz sampling probe tube. A filter plate is fixedly connected to the top of the stainless steel filter tube. A flange block is fixedly installed in the middle of the outer surface of the stainless steel filter tube. An installation plate is fixedly installed at the bottom of the outer surface of the stainless steel filter tube. Cleaning devices are provided on both sides of the top of the installation plate.

[0010] Preferably, the cleaning device includes an air pump, an air inlet pipe, an exhaust pipe, a connecting plate, and nozzles. The air pump is disposed on one side of the top of the mounting plate, the air inlet pipe is disposed on one side of the outer surface of the air pump, the exhaust pipe is disposed on the other side of the air pump, the connecting plate is disposed on the top of the outer surface of the exhaust pipe, and a plurality of nozzles are equidistantly disposed on one side of the surface of the connecting plate.

[0011] Preferably, one end of the flue gas sampling device is equipped with a cyclone dust collector, and one side of the cyclone dust collector is connected to a multi-stage pretreatment device via a pipeline.

[0012] Preferably, one side of the multi-stage pretreatment device is connected to an anti-interference detection device via a pipe, and the bottom of one side of the anti-interference detection device is fixedly connected to a real-time calibration device via a pipe.

[0013] Preferably, a temperature and pressure compensation device is fixedly connected to one side of the real-time calibration device via a pipe, and a data processing and transmission device is fixedly connected to one side of the temperature and pressure compensation device via a pipe.

[0014] Preferably, the stainless steel filter tube is fixedly installed at the flue gas outlet of the desulfurization tower via a flange block.

[0015] Preferably, the exhaust pipe is embedded inside the stainless steel filter pipe.

[0016] Preferably, connecting blocks are fixedly installed on both sides of the flange surface on the outer surface of the quartz sampling probe tube. A threaded hole is opened on one side of the surface of the connecting block, and a receiving groove is opened on the other side of the surface of the connecting block. The receiving groove and the threaded hole are connected.

[0017] Preferably, the internal threads of the threaded hole engage with a threaded rod, one end of the outer surface of the threaded rod is rotatably mounted with a limit block, and the other end of the threaded rod is fixedly connected to a threaded rod.

[0018] Preferably, the limiting block and the storage slot are adapted to each other, and the bottom of the limiting block is attached to the top of the mounting plate.

[0019] Compared with related technologies, the SO2 accurate measurement device of the desulfurization CEMS instrument provided by the present invention has the following beneficial effects:

[0020] This invention provides an accurate SO2 measuring device for a desulfurization CEMS instrument. A stainless steel filter tube is installed on the top of the outer surface of a quartz sampling probe tube. A filter plate is installed on top of the stainless steel filter tube to filter dust particles in the flue gas. A cleaning device uses an air pump to drive airflow through a nozzle to clean the dust particles accumulated on the filter plate surface, preventing dust particles from clogging the filter plate surface. This ensures the filtration effect and service life of the filter plate, reduces the frequency of disassembly and cleaning by operators, and improves the working efficiency of the equipment. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a first embodiment of a desulfurization CEMS instrument for accurate SO2 measurement provided by the present invention;

[0022] Figure 2 for Figure 1 The enlarged schematic diagram of part A shown below;

[0023] Figure 3 for Figure 2 The diagram shows the structure of the cleaning device.

[0024] Figure 4 for Figure 1 The diagram shows a rear view of the anti-interference detection device.

[0025] Figure 5 This is a schematic diagram of the second embodiment of a desulfurization CEMS instrument for accurate SO2 measurement provided by the present invention;

[0026] Figure 6 for Figure 5 The enlarged schematic diagram of part B is shown.

[0027] Each unit is connected sequentially via flanges or sealed piping to ensure leak-free flue gas transmission.

[0028] The following are the labels in the diagram: 1. Flue gas sampling device; 2. Cyclone dust collector; 3. Multi-stage pretreatment device; 4. Anti-interference detection device; 5. Real-time calibration device; 6. Temperature and pressure compensation device; 7. Data processing and transmission device; 8. Heated sampling pipeline; 9. Quartz sampling probe tube; 10. Stainless steel filter tube; 11. Mounting plate; 12. Flange block; 13. Filter plate; 14. Cleaning device; 141. Air pump; 142. Inlet pipe; 143. Exhaust pipe; 144. Connecting plate; 145. Nozzle; 15. Connecting block; 16. Threaded hole; 17. Threaded rod; 18. Adjusting block; 19. Limiting block. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0030] First Embodiment

[0031] Please refer to the following: Figure 1 , Figure 2 , Figure 3 and Figure 4 ,in, Figure 1 This is a schematic diagram of the structure of a first embodiment of a desulfurization CEMS instrument for accurate SO2 measurement provided by the present invention; Figure 2 for Figure 1 The enlarged schematic diagram of part A shown below; Figure 3 for Figure 2 The diagram shows the structure of the cleaning device. Figure 4 for Figure 1 The diagram shows a rear view of the anti-interference detection device.

[0032] A desulfurization CEMS instrument for accurate SO2 measurement includes: a flue gas sampling device 1;

[0033] A heat tracing sampling pipeline 8 is provided on one side of the top of the flue gas sampling device 1, and a quartz sampling probe tube 9 is provided on the top of the heat tracing sampling pipeline 8 through a flange.

[0034] A stainless steel filter tube 10 is disposed at one end of the outer surface of the quartz sampling probe tube 9. A filter plate 13 is fixedly connected to the top of the stainless steel filter tube 10. A flange block 12 is fixedly installed in the middle of the outer surface of the stainless steel filter tube 10. An installation plate 11 is fixedly installed at the bottom of the outer surface of the stainless steel filter tube 10. Cleaning devices 14 are provided on both sides of the top of the installation plate 11.

[0035] The cleaning device 14 includes an air pump 141, an air inlet pipe 142, an exhaust pipe 143, a connecting plate 144, and nozzles 145. The air pump 141 is disposed on one side of the top of the mounting plate 11, the air inlet pipe 142 is disposed on one side of the outer surface of the air pump 141, the exhaust pipe 143 is disposed on the other side of the air pump 141, the connecting plate 144 is disposed on the top of the outer surface of the exhaust pipe 143, and a plurality of nozzles 145 are equidistantly disposed on one side of the surface of the connecting plate 144.

[0036] One end of the flue gas sampling device 1 is equipped with a cyclone dust collector 2, and one side of the cyclone dust collector 2 is connected to a multi-stage pretreatment device 3 via a pipe.

[0037] One side of the multi-stage pretreatment device 3 is connected to an anti-interference detection device 4 via a pipe, and the bottom of one side of the anti-interference detection device 4 is fixedly connected to a real-time calibration device 5 via a pipe.

[0038] A temperature and pressure compensation device 6 is fixedly connected to one side of the real-time calibration device 5 via a pipe, and a data processing and transmission device 7 is fixedly connected to one side of the temperature and pressure compensation device 6 via a pipe.

[0039] The stainless steel filter tube 10 is fixedly installed at the flue gas outlet of the desulfurization tower via a flange block 12.

[0040] The exhaust pipe 143 is embedded inside the stainless steel filter pipe 10.

[0041] The flue gas sampling device 1 includes a quartz sampling probe tube 9 with heating function and a heat-traced sampling line 8; the quartz sampling probe tube 9 has a built-in electric heating element, and the heating temperature can be adjusted to 120-140℃. The top surface of the filter plate 13 has multiple filter holes with a pore size of 1μm; the heat-traced sampling line 8 adopts a polytetrafluoroethylene lining structure, and the heat tracing temperature is the same as that of the quartz sampling probe tube 9.

[0042] Cyclone dust collector 2 separates dust particles with a diameter ≥0.5μm using centrifugal force, achieving high dust removal efficiency. Multi-stage pretreatment device 3 includes a semiconductor condenser dehumidifier, a high-efficiency filter, and a drain pump connected in sequence. The semiconductor condenser dehumidifier uses the Peltier effect to cool the flue gas temperature to 5-8℃, causing water vapor to condense into liquid water and be automatically discharged by the drain pump. The flue gas has low relative humidity after dehumidification. The high-efficiency filter uses a polytetrafluoroethylene filter membrane with a pore size of 0.1μm, achieving high filtration efficiency.

[0043] The anti-interference detection device 4 includes a dual-beam ultraviolet DOAS detection cell, an ultraviolet light source, a spectrometer, optical lenses with an anti-stick coating, and an automatic purging device. The optical path length of the dual-beam ultraviolet DOAS detection cell is 1m. The light emitted by the ultraviolet light source is divided into a measurement beam and a reference beam. The measurement beam passes through the detection cell and interacts with the flue gas before entering the spectrometer, while the reference beam enters the spectrometer directly. The surface of the optical lens is coated with a fluorocarbon anti-stick coating. The automatic purging device can purge the detection cell and the surface of the optical lens with dry clean air at a pressure of 0.4-0.6MPa according to a preset cycle (adjustable from 2 to 24 hours).

[0044] The real-time calibration device includes a standard gas cylinder group, a solenoid valve group, a flow controller, and a calibration gas path; the standard gas cylinder group includes a zero-point gas cylinder (containing high-purity nitrogen with a purity ≥99.999%) and a range gas cylinder (containing SO2 standard gas of known concentration); the temperature and pressure compensation device 6 has a built-in temperature sensor (measurement range -20-80℃, accuracy ±0.5℃) and a pressure sensor.

[0045] The data processing and transmission device 7 includes an industrial-grade PLC controller, a touch screen, a data storage module, and a communication interface; the communication interface supports 4G, Ethernet, or RS485 transmission methods and is compatible with HJ 212-2017 "Data Transmission Standard for Online Monitoring (Monitoring) Systems of Pollutants"; the touch screen is a 7-inch human-machine interface that supports parameter setting, historical data query, and manual calibration operations.

[0046] The flue gas sampling device 1, cyclone dust removal device 2, multi-stage pretreatment device 3, anti-interference detection device 4, real-time calibration device 5, temperature and pressure compensation device 6, data processing and transmission device 7, heated sampling pipeline 8, and quartz sampling probe 9 are all existing technologies. The flue gas sampling device 1, cyclone dust removal device 2, multi-stage pretreatment device 3, anti-interference detection device 4, real-time calibration device 5, temperature and pressure compensation device 6, and data processing and transmission device 7 are all connected by flange seals to ensure that there is no leakage or pollution during the sampling process.

[0047] The working principle of the accurate SO2 measurement device of the desulfurization CEMS instrument provided by the present invention is as follows:

[0048] During operation, the stainless steel filter tube 10 is first installed on the outer surface of the quartz sampling probe tube 9, and the filter plate 13 is placed on top of the stainless steel filter tube 10 to filter dust in the flue gas.

[0049] The stainless steel filter tube 10 is installed in the flue gas outlet of the desulfurization tower using flange block 12 and bolts. If necessary, the air pump 141 can be started. The air pump 141 guides the airflow through the air inlet pipe 142 to the exhaust pipe 143 and sprays it out from the nozzle 145. The sprayed airflow blows away the dust particles accumulated on the top of the filter plate 13, maintaining the flue gas flow efficiency on the surface of the filter plate 13 and reducing the frequency of manual disassembly, cleaning and maintenance.

[0050] Compared with related technologies, the SO2 accurate measurement device of the desulfurization CEMS instrument provided by the present invention has the following beneficial effects:

[0051] This invention provides an accurate SO2 measuring device for a desulfurization CEMS instrument. A stainless steel filter tube 10 is installed on the top of the outer surface of a quartz sampling probe tube 9. A filter plate 13 is installed on the top of the stainless steel filter tube 10 to filter dust particles in the flue gas. A cleaning device 14 uses an air pump 141 to drive airflow through a nozzle 145 to guide the airflow onto the surface of the filter plate 13, cleaning the dust particles accumulated on the surface of the filter plate 13. This prevents dust particles from clogging the surface of the filter plate 13, thus ensuring the filtration effect and service life of the filter plate 13, reducing the frequency of disassembly and cleaning by operators, and improving the working efficiency of the equipment.

[0052] Second Embodiment

[0053] Please refer to the following: Figure 5 and Figure 6 Based on the first embodiment of this application which provides an accurate SO2 measuring device for a desulfurization CEMS instrument, the second embodiment of this application proposes another accurate SO2 measuring device for a desulfurization CEMS instrument. The second embodiment is merely a preferred embodiment of the first embodiment, and the implementation of the second embodiment will not affect the separate implementation of the first embodiment.

[0054] Specifically, the difference in the SO2 accurate measurement device of the desulfurization CEMS instrument provided in the second embodiment of this application is that connecting blocks 15 are fixedly installed on both sides of the flange surface of the outer surface of the quartz sampling probe tube 9. A threaded hole 16 is opened on one side of the surface of the connecting block 15, and a receiving groove is opened on the other side of the surface of the connecting block 15. The receiving groove and the threaded hole 16 are connected.

[0055] The threaded hole 16 is internally threaded with a threaded rod 17. One end of the outer surface of the threaded rod 17 is rotatably mounted with a limit block 19, and the other end of the threaded rod 17 is fixedly connected to the threaded rod 17.

[0056] The limiting block 19 is adapted to the storage slot, and the bottom of the limiting block 19 is attached to the top of the mounting plate 11.

[0057] The storage slot is located on the surface of the connecting block 15 near the stainless steel filter tube 10. The limiting block 19 can be completely stored inside the storage slot. The limiting block 19 is square and fits the storage slot. It will not rotate due to the rotation of the threaded rod 17, but can only be pulled and slid by the threaded rod 17.

[0058] The working principle of the accurate SO2 measurement device of the desulfurization CEMS instrument provided by the present invention is as follows:

[0059] During operation, the stainless steel filter tube 10 is first fitted onto the outer surface of the quartz sampling probe tube 9, and the filter plate 13 is placed on top of the outer surface of the quartz sampling probe tube 9.

[0060] After installation, rotate the adjusting block 18. The adjusting block 18 drives the threaded rod 17 to rotate. The threaded rod 17 rotates and engages with the threaded hole 16 to move. The threaded rod 17 pushes the limiting block 19 to slide inside the receiving groove toward the stainless steel filter tube 10, so that the bottom of the limiting block 19 is attached to the top of the mounting plate 11, making it impossible for the mounting plate 11 to be pulled upwards or out of the outer surface of the quartz sampling probe tube 9. Furthermore, the filter plate 13 blocks the top of the quartz sampling probe tube 9, preventing the stainless steel filter tube 10 from moving downwards on the surface of the quartz sampling probe tube 9.

[0061] When it is necessary to disassemble the stainless steel filter tube 10, rotate the threaded rod 17 in the opposite direction to move the threaded hole 16 away from the stainless steel filter tube 10, so that the limiting block 19 is disengaged from the mounting plate 11 and stored in the storage groove of the connecting block 15. The mounting plate 11 is unrestricted, and the stainless steel filter tube 10 can be easily pulled upward.

[0062] Compared with related technologies, the SO2 accurate measurement device of the desulfurization CEMS instrument provided by the present invention has the following beneficial effects:

[0063] This invention provides an accurate SO2 measuring device for a desulfurization CEMS instrument. By fixing connecting blocks 15 on both sides of the flange surface on the outer surface of the quartz sampling probe tube 9, and with the stainless steel filter tube 10 installed on the outer surface of the quartz sampling probe tube 9, rotating the threaded rod 17 engages with the threaded hole 16, causing the threaded rod 17 to push the limiting block 19 to move. This allows the limiting block 19 to move out of the connecting block 15 and block the top of the mounting plate 11, making it easy to remove the stainless steel filter tube 10 from the surface of the quartz sampling probe tube 9. When it is necessary to clean the stainless steel filter tube... When cleaning or replacing the filter tube 10, simply rotate the threaded rod 17 in the reverse direction to allow the limiting block 19 to retract into the receiving groove of the connecting block 15. This makes it easy to remove the stainless steel filter tube 10 from the surface of the quartz sampling probe tube 9. The operation is simple and quick, greatly improving the maintenance efficiency of the equipment. The design of the limiting block 19 ensures the stability of the stainless steel filter tube 10 after installation, effectively preventing the stainless steel filter tube 10 from falling off the surface of the quartz sampling probe tube 9 due to flue gas impact or equipment vibration, thus ensuring the long-term stable operation of the equipment.

[0064] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A desulfurization CEMS instrument for accurate SO2 measurement, characterized in that, include: Flue gas sampling device; A heat tracing sampling pipeline is provided on one side of the top of the flue gas sampling device, and a quartz sampling probe tube is provided on the top of the heat tracing sampling pipeline through a flange. A stainless steel filter tube is disposed at one end of the outer surface of the quartz sampling probe tube. A filter plate is fixedly connected to the top of the stainless steel filter tube. A flange block is fixedly installed in the middle of the outer surface of the stainless steel filter tube. An installation plate is fixedly installed at the bottom of the outer surface of the stainless steel filter tube. Cleaning devices are provided on both sides of the top of the installation plate.

2. The SO2 accurate measuring device of a desulfurization CEMS instrument according to claim 1, characterized in that, The cleaning device includes an air pump, an air inlet pipe, an exhaust pipe, a connecting plate, and nozzles. The air pump is located on one side of the top of the mounting plate, the air inlet pipe is located on one side of the outer surface of the air pump, the exhaust pipe is located on the other side of the air pump, the connecting plate is located on the top of the outer surface of the exhaust pipe, and a plurality of nozzles are equidistantly arranged on one side of the surface of the connecting plate.

3. The SO2 accurate measuring device of a desulfurization CEMS instrument according to claim 1, characterized in that, One end of the flue gas sampling device is equipped with a cyclone dust collector, and one side of the cyclone dust collector is connected to a multi-stage pretreatment device via a pipeline.

4. The SO2 accurate measuring device of a desulfurization CEMS instrument according to claim 3, characterized in that, One side of the multi-stage pretreatment device is connected to an anti-interference detection device via a pipe, and the bottom of one side of the anti-interference detection device is fixedly connected to a real-time calibration device via a pipe.

5. The accurate SO2 measuring device for a desulfurization CEMS instrument according to claim 4, characterized in that, A temperature and pressure compensation device is fixedly connected to one side of the real-time calibration device via a pipe, and a data processing and transmission device is fixedly connected to one side of the temperature and pressure compensation device via a pipe.

6. The accurate SO2 measuring device for a desulfurization CEMS instrument according to claim 1, characterized in that, The stainless steel filter tube is fixedly installed at the flue gas outlet of the desulfurization tower via a flange block.

7. The SO2 accurate measuring device of a desulfurization CEMS instrument according to claim 2, characterized in that, The exhaust pipe is embedded inside the stainless steel filter pipe.

8. The accurate SO2 measuring device for a desulfurization CEMS instrument according to claim 1, characterized in that, Connecting blocks are fixedly installed on both sides of the flange surface on the outer surface of the quartz sampling probe tube. A threaded hole is opened on one side of the surface of the connecting block, and a receiving groove is opened on the other side of the surface of the connecting block. The receiving groove and the threaded hole are connected.

9. The accurate SO2 measuring device for a desulfurization CEMS instrument according to claim 8, characterized in that, The threaded hole has a threaded rod engaged with its internal threads. One end of the threaded rod is rotatably mounted with a limit block, and the other end of the threaded rod is fixedly connected to a threaded rod.

10. The accurate SO2 measuring device for a desulfurization CEMS instrument according to claim 9, characterized in that, The limiting block and the storage slot are adapted to each other, and the bottom of the limiting block is attached to the top of the mounting plate.

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