Calibration equipment of CEMS (Continuous Emission Monitoring System) flue gas online monitoring system

Abstract

The utility model relates to the technical field of flue gas on-line monitoring, and discloses a calibration device of a CEMS flue gas on-line monitoring system, which comprises a mounting plate, one side of the mounting plate is fixedly provided with a flue gas probe, the top of one side of the mounting plate is fixedly provided with a motor, an output shaft of the motor is connected with a gear, and the output shaft of the gear is connected with an output shaft of the CEMS. A sleeve is fixedly arranged on the other side of the mounting plate, a plugging pipe is arranged in the sleeve, and a gear ring connected with the gear in an engaged mode is arranged on the inner wall of one end of the plugging pipe; one end of the plugging pipe can be supported through the supporting assembly, the gear is driven by the motor, the gear can drive the plugging pipe to rotate through the gear ring, the plugging pipe can plug the sleeve and isolate smoke in the chimney, standard gas is input into the sleeve through the gas inlet pipe, and the standard gas can reach the smoke probe. And the flue gas reaches the flue gas analyzer from the flue gas probe.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas online monitoring, in particular to calibration equipment for a CEMS flue gas online monitoring system. Background Art

[0002] The continuous emission monitoring system (CEMS) can be used to monitor harmful gases and particulate matter in the air. It can be used in thermal power plants, brick factories, kilns, waste incineration and other places. It mainly conducts real-time online continuous monitoring of flue gas pollutants generated by combustion, and is an important part of current environmental monitoring management.

[0003] Its application number is "202121098143.2" disclosed in the "CEMS flue gas online monitoring equipment full system calibration device", its "CEMS flue gas online monitoring equipment full system calibration device, including a sampling probe, a sampling tube, a standard gas tube, a standard gas tank, an exhaust pipe, a three-way solenoid valve, an equipment room, a sample gas pretreatment device, a first exhaust pipe, a three-way switching valve, a second exhaust pipe, an adjustable flow meter, a third exhaust pipe and a flue gas analyzer. The sampling probe and the three-way solenoid valve are both located at the flue gas online equipment platform at an elevation of 23 meters. The input end of the three-way solenoid valve is connected to the sampling probe through a sampling tube. The standard gas tank, the sample gas pretreatment device, the first exhaust pipe, the three-way switching valve, the second exhaust pipe, the adjustable flow meter, the third exhaust pipe and the flue gas analyzer are all located in the equipment room on the ground. The standard gas tank is connected to the input end of the three-way solenoid valve through a standard gas tube." In the utility model, an anti-corrosion three-way solenoid valve is added at the sampling probe of the flue gas online equipment platform (elevation 23 meters), and the original spare sampling pipeline is used as a standard gas pipe to be connected to the outlet pipe through the three-way solenoid valve. When calibrating the entire system, it is only necessary to open the three-way solenoid valve to isolate the sampling probe from the outlet pipe while connecting the standard gas pipe and the outlet pipe, and then introduce standard gas into the standard gas pipe between the equipment. The standard gas can enter the flue gas analyzer through the outlet pipe, the sample gas pretreatment device and other devices for calibration. The utility model can simulate the sample gas flow route during normal measurement of the flue gas online monitoring system to perform full system detection, avoid inaccurate measurement data due to leakage or blockage of the sampling pipe and the sample gas pretreatment device, and ensure the accuracy of the flue gas online monitoring data to the greatest extent.

[0004] However, the above method still has the following defects: standard gas can be input through the three-way solenoid valve, but the standard gas reaches the flue gas analyzer directly, and it is difficult to make the standard gas pass through the sampling probe. When the sampling probe is working normally, it is easy to cause errors when calibrating the monitoring system. Utility Model Content

[0005] In view of the deficiencies of the prior art, the present invention provides a calibration device for a CEMS flue gas online monitoring system, which has the advantages of facilitating the passage of standard gas through a sampling probe, reducing errors, and solving the problems raised by the above-mentioned background technology.

[0006] The utility model provides the following technical solutions: a calibration device for a CEMS flue gas online monitoring system, comprising a mounting plate, a flue gas probe being fixedly provided on one side of the mounting plate, a motor being fixedly provided on the top of one side of the mounting plate, the output shaft of the motor being connected to a gear, a sleeve being fixedly provided on the other side of the mounting plate, a sealing tube being provided inside the sleeve, a gear ring being meshed with the gear on the inner wall of one end of the sealing tube, a supporting assembly for supporting the sealing tube being provided on one end of the sleeve, a decompression assembly for discharging excess standard gas being provided on one side of the sleeve, and an air inlet pipe being provided on the other side of the sleeve.

[0007] As an optimal technical solution of the present invention, a plurality of mounting holes are opened on the surface of the mounting plate, a rubber ring is provided on one side of the mounting plate, and a protective shell is fixed on the other side of the mounting plate, and the smoke probe and the motor are both located inside the protective shell.

[0008] As a preferred technical solution of the present invention, a pipeline sheath is fixedly provided on the bottom end of the protective shell, a support frame is fixedly provided on one side of the protective shell, and a cover plate is fixedly connected to one side of the support frame by screws.

[0009] As an optimal technical solution of the present invention, the support assembly includes a support shaft, a bearing and a support plate. The support shaft is rotatably connected to the middle part of one end of the sleeve through the bearing, the middle part of one side of the support plate is fixedly connected to one end of the support shaft, the other end of the sealing tube is fixedly connected to the other side of the support plate, and an axial hole is opened in the middle part of one end of the sleeve to be interlaced with the support shaft.

[0010] As an optimal technical solution of the present invention, the top and bottom of the sleeve are both provided with a first ventilation groove, the surface of the blocking tube is provided with two second ventilation grooves, and the surface of the second ventilation groove is provided with a sealing strip.

[0011] As a preferred technical solution of the present invention, a ventilation pipe is fixedly connected to one side of the smoke probe, and the ventilation pipe is located inside the blocking pipe.

[0012] As a preferred technical solution of the present utility model, the decompression assembly includes a pressure relief hood, one end of the pressure relief hood is fixedly connected to one side of the sleeve, a plurality of exhaust holes are provided on the surface of the pressure relief hood, a piston is slidably connected to the inside of the pressure relief hood, a sliding rod is provided in the middle of one end of the piston, the sliding rod is slidably connected to the other end of the pressure relief hood, a spring is provided on the surface of the sliding rod, and a blocking plate is fixedly provided at one end of the sliding rod.

[0013] As a preferred technical solution of the present invention, both ends of the piston are provided with limiting grooves, and the interior of the limiting grooves is engaged with sealing rings.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. One end of the blocking tube can be supported by the support assembly. The motor drives the gear, which can drive the blocking tube to rotate through the gear ring. The blocking tube can block the sleeve to isolate the flue gas inside the chimney. Standard gas is input into the sleeve through the air inlet pipe, so that the standard gas reaches the flue gas probe, and then reaches the flue gas analyzer through the flue gas probe. The monitoring system can be calibrated when the flue gas probe is working, and it is not easy to cause errors.

[0016] 2. When the pressure of the standard gas input through the air inlet pipe is high, the pressure reducing assembly can discharge the excess standard gas to avoid the phenomenon of excessive pressure. The motor drives the gear in reverse to reset the blocking tube and stop the blocking sleeve, which can ensure that the flue gas inside the chimney reaches the flue gas probe and can perform online monitoring of the flue gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is one of the structural diagrams of the present utility model;

[0018] Figure 2 This is the second structural diagram of the present utility model;

[0019] Figure 3 This is a schematic diagram of the explosion structure of the utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the plugging sleeve of the utility model;

[0021] Figure 5 This is a structural diagram of the mounting plate of the utility model;

[0022] Figure 6 This is a schematic structural diagram of the gear ring of the utility model;

[0023] Figure 7 This is a schematic structural diagram of the decompression assembly of the utility model.

[0024] In the figure: 1. Mounting plate; 2. Mounting hole; 3. Rubber ring; 4. Sleeve; 5. Sealing tube; 6. Ventilation groove 1; 7. Ventilation groove 2; 8. Sealing strip; 9. Support assembly; 901. Support shaft; 902. Bearing; 903. Support plate; 10. Shaft hole; 11. Gear ring; 12. Pressure reducing assembly; 1201. Pressure relief cover; 1202. Slide rod; 1203. Spring; 1204. Piston; 1205. Sealing ring; 1206. Baffle; 1207. Exhaust hole; 13. Smoke probe; 14. Ventilation pipe; 15. Motor; 16. Protective shell; 17. Pipeline sheath; 18. Support frame; 19. Cover plate; 20. Gear; 21. Inlet pipe. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] See also Figures 1 to 7 , the calibration equipment of the CEMS flue gas online monitoring system includes a mounting plate 1, a flue gas probe 13 is fixedly provided on one side of the mounting plate 1, a motor 15 is fixedly installed on the top of one side of the mounting plate 1, the output shaft of the motor 15 is connected to a gear 20, and a sleeve 4 is fixedly provided on the other side of the mounting plate 1, a sealing tube 5 is provided inside the sleeve 4, and the inner wall of one end of the sealing tube 5 is provided with a gear ring 11 meshing with the gear 20, and a support assembly 9 for supporting the sealing tube 5 is provided at one end of the sleeve 4, and one end of the sealing tube 5 can be supported by the support assembly 9, and the gear 20 is driven by the motor 15, and the gear 20 can drive the sealing tube 5 to rotate through the gear ring 11, and the sealing tube 5 can block the sleeve 4 to isolate the flue gas, and a decompression assembly 12 for discharging excess standard gas is provided on one side of the sleeve 4, and an air inlet pipe 21 is provided on the other side of the sleeve 4, and standard gas is input into the sleeve 4 through the air inlet pipe 21, so that the standard gas can reach the flue gas probe 13;

[0027] In this embodiment, preferably, the support assembly 9 includes a support shaft 901, a bearing 902 and a support plate 903. The support shaft 901 is rotatably connected to the middle part of one end of the sleeve 4 through the bearing 902. The middle part of one side of the support plate 903 is fixedly connected to one end of the support shaft 901. The other end of the blocking tube 5 is fixedly connected to the other side of the support plate 903. The middle part of one end of the sleeve 4 is provided with an axial hole 10 that is interlaced with the support shaft 901. The support plate 903 can be supported by the bearing 902 and the support shaft 901. The support plate 903 can support one end of the blocking tube 5 and ensure the rotation of the blocking tube 5.

[0028] In this embodiment, preferably, the decompression assembly 12 includes a pressure relief cover 1201, one end of the pressure relief cover 1201 is fixedly connected to one side of the sleeve 4, a plurality of exhaust holes 1207 are opened on the surface of the pressure relief cover 1201, a piston 1204 is slidably connected to the interior of the pressure relief cover 1201, a slide rod 1202 is provided in the middle of one end of the piston 1204, the slide rod 1202 is slidably connected to the other end of the pressure relief cover 1201, a spring 1203 is provided on the surface of the slide rod 1202, and a baffle 1207 is fixed on one end of the slide rod 1202. 206, both ends of the piston 1204 are provided with limiting grooves, and the inner part of the limiting groove is engaged with a sealing ring 1205, which can limit the sealing ring 1205 through the limiting groove. The sealing ring 1205 can ensure the sealing between the piston 1204 and the pressure relief cover 1201. When the input standard gas pressure is large, the pressure will be transmitted to the piston 1204. The piston 1204 can compress the spring 1203 under pressure, causing displacement, and the excess standard gas can be discharged through the exhaust hole 1207, avoiding the phenomenon of excessive pressure;

[0029] In this embodiment, preferably, a plurality of mounting holes 2 are opened on the surface of the mounting plate 1, and a rubber ring 3 is provided on one side of the mounting plate 1. The mounting plate 1 can be fixed to the chimney through the mounting hole 2, and the rubber ring 3 can seal it. A protective shell 16 is fixed on the other side of the mounting plate 1, and the flue gas probe 13 and the motor 15 are both located inside the protective shell 16. The protective shell 16 can provide protection for the flue gas probe 13 and the motor 15. A pipeline sheath 17 is fixed on the bottom end of the protective shell 16, and the pipeline of the flue gas probe 13 can be passed through the pipeline sheath 17. A support frame 18 is fixed on one side of the protective shell 16, and a cover plate 19 is fixedly connected to one side of the support frame 18 by screws, and the cover plate 19 can be fixed by the support frame 18;

[0030] In this embodiment, preferably, a ventilation groove 1 6 is provided on the top and bottom of the sleeve 4, two ventilation grooves 2 7 are provided on the surface of the sealing tube 5, and a sealing strip 8 is provided on the surface of the ventilation groove 2 7. A ventilation pipe 14 is fixedly connected to one side of the smoke probe 13, and the ventilation pipe 14 is located inside the sealing tube 5. The ventilation groove 1 6 and the ventilation groove 2 7 can ensure that the smoke passes through the ventilation pipe 14 of the smoke probe 13, so that the smoke can be monitored online.

[0031] When in use, first, the motor 15 drives the gear 20, and the gear 20 drives the blocking tube 5 to rotate through the gear ring 11. The blocking tube 5 can block the ventilation groove 1 6 of the sleeve 4, and the ventilation groove 1 6 can be misaligned with the ventilation groove 2 7. The sealing strip 8 can seal between the ventilation groove 2 7 and the sleeve 4, which can isolate the smoke inside the chimney and prevent the entry of smoke. Then, standard gas is input into the sleeve 4 through the air inlet pipe 21. The standard gas reaches the smoke probe 13 through the ventilation pipe 14, and reaches the smoke analyzer from the smoke probe 13. The monitoring system can be calibrated when the smoke probe 13 is working, which is not easy to cause errors.

[0032] When the pressure of the standard gas input during the calibration process is relatively high, the pressure will be transmitted to the piston 1204. The piston 1204 is under pressure to compress the spring 1203, causing displacement, and the excess standard gas can be discharged through the exhaust hole 1207, avoiding the phenomenon of excessive pressure. After the pressure is reduced, the spring 1203 can push the piston 1204 to reset. After the calibration is completed, the staff drives the gear 20 in reverse through the motor 15 to reset the sealing tube 5. The air vent groove 2 7 and the air vent groove 1 6 are located in the same vertical plane, and the sealing sleeve 4 is stopped, which can ensure that the flue gas inside the chimney passes through the air vent groove 2 7 and the air vent groove 1 6 to reach the flue gas probe 13, so that the flue gas can be monitored online.

[0033] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A calibration device for a CEMS flue gas online monitoring system, comprising a mounting plate (1), characterized in that: A smoke probe (13) is fixedly provided on one side of the mounting plate (1), a motor (15) is fixedly provided on the top of one side of the mounting plate (1), the output shaft of the motor (15) is connected to a gear (20), a sleeve (4) is fixedly provided on the other side of the mounting plate (1), a sealing tube (5) is provided inside the sleeve (4), a gear ring (11) meshingly connected to the gear (20) is provided on the inner wall of one end of the sealing tube (5), a support assembly (9) for supporting the sealing tube (5) is provided on one end of the sleeve (4), a decompression assembly (12) for discharging excess standard gas is provided on one side of the sleeve (4), and an air inlet pipe (21) is provided on the other side of the sleeve (4).

2. The calibration device of the CEMS online flue gas monitoring system according to claim 1, characterized in that: A plurality of mounting holes (2) are provided on the surface of the mounting plate (1), a rubber ring (3) is provided on one side of the mounting plate (1), and a protective shell (16) is fixedly provided on the other side of the mounting plate (1), and the smoke probe (13) and the motor (15) are both located inside the protective shell (16).

3. The calibration device of the CEMS online flue gas monitoring system according to claim 2, characterized in that: A pipeline sheath (17) is fixedly provided at the bottom end of the protective shell (16), a support frame (18) is fixedly provided at one side of the protective shell (16), and a cover plate (19) is fixedly connected to one side of the support frame (18) by screws.

4. The calibration device for the CEMS online flue gas monitoring system according to claim 1, characterized in that: The support assembly (9) comprises a support shaft (901), a bearing (902) and a support plate (903); the support shaft (901) is rotatably connected to the middle portion of one end of the sleeve (4) via the bearing (902); the middle portion of one side of the support plate (903) is fixedly connected to one end of the support shaft (901); the other end of the blocking tube (5) is fixedly connected to the other side of the support plate (903); and an axial hole (10) for interpenetrating and linking with the support shaft (901) is provided in the middle portion of one end of the sleeve (4).

5. The calibration device for the CEMS online flue gas monitoring system according to claim 1, characterized in that: The top and bottom of the sleeve (4) are both provided with a first ventilation groove (6), the surface of the blocking tube (5) is provided with two second ventilation grooves (7), and the surface of the second ventilation groove (7) is provided with a sealing strip (8).

6. The calibration device for the CEMS online flue gas monitoring system according to claim 1, characterized in that: A ventilation pipe (14) is fixedly connected to one side of the smoke probe (13), and the ventilation pipe (14) is located inside the blocking pipe (5).

7. The calibration device for the CEMS online flue gas monitoring system according to claim 1, characterized in that: The decompression assembly (12) includes a pressure relief cover (1201), one end of which is fixedly connected to one side of the sleeve (4), a plurality of exhaust holes (1207) are provided on the surface of the pressure relief cover (1201), a piston (1204) is slidably connected to the interior of the pressure relief cover (1201), a sliding rod (1202) is provided in the middle of one end of the piston (1204), the sliding rod (1202) is slidably connected to the other end of the pressure relief cover (1201), a spring (1203) is sleeved on the surface of the sliding rod (1202), and a baffle (1206) is fixedly provided at one end of the sliding rod (1202).

8. The calibration device for the CEMS online flue gas monitoring system according to claim 7, characterized in that: Both ends of the piston (1204) are provided with limiting grooves, and the interior of the limiting grooves is engaged with a sealing ring (1205).

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