Multi-point sampling and measuring device for oxygen content of tail flue gas of boiler

Abstract

The utility model discloses a boiler tail flue gas oxygen content multipoint sampling measuring device, which relates to the technical field of flue gas measurement, and comprises a detector body, the detector body comprises a junction box, a protective shell is fixedly mounted on one side of the junction box, a filter pipe is fixedly mounted at one end of the protective shell, a cleaning component is mounted on the protective shell, and the filter pipe is fixedly mounted on the cleaning component. The cleaning assembly comprises a gear ring, the gear ring is rotationally installed at one end of the protective shell, a cleaning brush is fixedly installed on one side of the gear ring, a driving shaft is rotationally installed on the protective shell, a driving gear is fixedly installed at one end of the driving shaft, a driving motor is fixedly installed on one side of the junction box, and the driving motor is fixedly connected with one end of the driving shaft. When much smoke dust adheres to the filtering pipe, the driving motor is used for driving the driving shaft to rotate, the driving shaft drives the driving gear to rotate, the driving gear drives the gear ring to rotate, the gear ring drives the cleaning brush to do circular motion along the filtering pipe to clean the filtering pipe, and filtering holes of the filtering pipe are prevented from being blocked.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas measurement, in particular to a multi-point sampling and measuring device for oxygen content in flue gas at the tail end of a boiler. Background Art

[0002] Measuring the oxygen content of flue gas at the tail end of a boiler is crucial for optimizing the combustion process and controlling pollutant emissions. Multiple flue gas oxygen measurement devices are required to take samples from different sections of the boiler flue to obtain more representative data. Such devices usually include sampling probes, pretreatment systems, gas analysis instruments, and data processing and remote communication systems.

[0003] Zirconia oxygen detectors are often used to detect the oxygen content in flue gas to observe whether the fuel is burning fully. When in use, they are fixed to the furnace or flue wall through a flange. A porous ceramic filter tube is installed at the flue gas inlet of the zirconia oxygen detector to filter out the soot in the flue gas. However, as the working time increases, soot will be adsorbed on the porous ceramic filter tube, which reduces the permeability of the porous ceramic filter tube and causes inaccurate oxygen measurement. Cleaning the porous ceramic filter tube requires removing the zirconia oxygen detector from the furnace or flue wall, which is inconvenient to operate. In response to the above problems, the inventors proposed a multi-point sampling and measuring device for the oxygen content of flue gas at the tail of the boiler to solve the above problems. Utility Model Content

[0004] In order to solve the problem that the filter tube in the existing boiler tail flue gas oxygen content sampling and measuring device is difficult to clean; the purpose of the utility model is to provide a boiler tail flue gas oxygen content multi-point sampling and measuring device.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions: a multi-point sampling and measuring device for the oxygen content of flue gas at the tail end of a boiler, comprising a detector body, the detector body comprising a junction box, a protective shell fixedly mounted on one side of the junction box, a filter tube fixedly mounted on one end of the protective shell, a cleaning assembly mounted on the protective shell, the cleaning assembly comprising a gear ring, the gear ring rotatably mounted on one end of the protective shell, a cleaning brush fixedly mounted on one side of the gear ring, and the bristles of the cleaning brush contact the filter holes of the filter tube, a drive shaft rotatably mounted on the protective shell, a drive gear fixedly mounted on one end of the drive shaft, and the drive gear is meshed with the gear ring, a drive motor fixedly mounted on one side of the junction box, and the drive motor is fixedly connected to one end of the drive shaft.

[0006] Preferably, a flange is slidably mounted on the protective shell, and the drive shaft is inserted through the flange. A sliding groove is fixedly mounted on the protective shell, and the flange is slidably clamped in the sliding groove.

[0007] Preferably, a threaded rod is rotatably installed in the slide groove, and the threaded rod is threadedly inserted in the flange. A rotating rod is rotatably installed on one side of the junction box where a protective shell is installed. A knob is fixedly installed at the bottom end of the rotating rod. Bevel gears are fixedly installed at the top of the rotating rod and one end of the threaded rod, and the two bevel gears are meshed.

[0008] Preferably, a zirconia tube is fixedly installed on one side of the junction box with a protective shell, and the zirconia tube is located in the protective shell. A flow guide cover is installed in the filter tube, and the flow guide cover is fixedly connected and communicated with one end of the zirconia tube.

[0009] Compared with the prior art, the beneficial effects of the present invention are:

[0010] 1. In the present invention, when there is a lot of smoke and dust adhering to the filter tube, the driving motor drives the driving shaft to rotate, the driving shaft drives the driving gear to rotate, the driving gear drives the gear ring to rotate, and the gear ring drives the cleaning brush to make a circular motion along the filter tube to clean the filter tube and prevent the filter holes of the filter tube from being blocked;

[0011] 2. In the present invention, according to the inner diameter of the smoke exhaust pipe, the knob is used to drive the rotating rod to rotate, the rotating rod drives the threaded rod to rotate through the bevel gear, and the threaded rod drives the flange to slide along the slide groove to adjust its position, so that the deflector at one end of the zirconia tube is located in the center of the smoke exhaust pipe, which is convenient for detecting the smoke. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0013] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the cross-sectional structure of the protective shell and filter tube of the utility model;

[0015] Figure 3 For this utility model Figure 2 A magnified schematic diagram of the structure in the middle.

[0016] In the figure: 1. Detector body; 101. Junction box; 102. Protective shell; 103. Filter tube; 104. Flange; 105. Zirconia tube; 106. Flow guide cover; 2. Cleaning assembly; 21. Gear ring; 22. Drive gear; 23. Cleaning brush; 24. Drive shaft; 25. Drive motor; 3. Slide; 4. Knob; 5. Threaded rod; 6. Rotating rod; 7. Bevel gear. DETAILED DESCRIPTION

[0017] 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.

[0018] Example: Figure 1-3 As shown, the utility model provides a multi-point sampling and measuring device for oxygen content in flue gas at the tail end of a boiler, including a detector body 1, the detector body 1 includes a junction box 101, a protective shell 102 is fixedly installed on one side of the junction box 101, a filter tube 103 is fixedly installed on one end of the protective shell 102, a cleaning component 2 is installed on the protective shell 102, the cleaning component 2 includes a gear ring 21, the gear ring 21 is rotatably installed on one end of the protective shell 102, a cleaning brush 23 is fixedly installed on one side of the gear ring 21, and the bristles of the cleaning brush 23 are in contact with the filter holes of the filter tube 103, a driving shaft 24 is rotatably installed on the protective shell 102, a driving gear 22 is fixedly installed on one end of the driving shaft 24, and the driving gear 22 is meshed with the gear ring 21, and a side of the junction box 101 is fixedly installed. A drive motor 25 is installed, and the drive motor 25 is fixedly connected to one end of the drive shaft 24. The filter tube 103 is made of ceramic material and is used to protect the zirconia tube 105 from dust pollution. The protective shell 102 is used to protect the internal components and usually has a fully enclosed structure to improve the sealing and high temperature resistance and corrosion resistance. The junction box 101 contains electrical connections and output signals. When there is a lot of smoke and dust adhering to the filter tube 103, the drive motor 25 is used to drive the drive shaft 24 to rotate, the drive shaft 24 drives the drive gear 22 to rotate, the drive gear 22 drives the gear ring 21 to rotate, and the gear ring 21 drives the cleaning brush 23 to make a circular motion along the filter tube 103 to clean the filter tube 103 (the cleaning brush 23 is a high-temperature resistant steel wire brush) to prevent the filter holes of the filter tube 103 from being blocked.

[0019] A flange 104 is slidably mounted on the protective shell 102 , and the drive shaft 24 is inserted through the flange 104 .

[0020] By adopting the above technical solution, the detector body 1 can be installed on the detection port of the smoke exhaust pipe using the flange 104 .

[0021] A slide groove 3 is fixedly mounted on the protective shell 102 , and the flange 104 is slidably clamped in the slide groove 3 .

[0022] By adopting the above technical solution, the position of the flange 104 can be slid along the slide groove 3 according to the inner diameter of the smoke exhaust pipe to adjust the position of the air inlet end of the zirconia tube 105, so that the air inlet end of the zirconia tube 105 is located in the center of the smoke exhaust pipe, which is convenient for detecting smoke.

[0023] A threaded rod 5 is rotatably mounted in the chute 3 , and the threaded rod 5 is threadedly inserted into the flange 104 .

[0024] By adopting the above technical solution, the threaded rod 5 drives the flange 104 to slide and adjust along the sliding groove 3.

[0025] A rotating rod 6 is rotatably mounted on one side of the junction box 101 where the protective shell 102 is mounted, and a knob 4 is fixedly mounted on the bottom end of the rotating rod 6 .

[0026] By adopting the above technical solution, the knob 4 is used to drive the rotating rod 6 to rotate.

[0027] The top end of the rotating rod 6 and one end of the threaded rod 5 are both fixedly mounted with bevel gears 7 , and the two bevel gears 7 are meshed.

[0028] By adopting the above technical solution, the rotating rod 6 drives the threaded rod 5 to rotate through the bevel gear 7.

[0029] A zirconia tube 105 is fixedly mounted on one side of the junction box 101 where the protective shell 102 is mounted, and the zirconia tube 105 is located inside the protective shell 102 .

[0030] By adopting the above technical solution, the zirconia tube 105 is used as the electrolyte, which is usually a ceramic material and is coated with a platinum electrode inside. It is usually used in combination with a platinum electrode to form a high-temperature electrolyte concentration cell. At high temperatures, zirconia can allow oxygen ions to migrate through its lattice, thereby generating a potential difference between the platinum electrodes on both sides. This potential difference is related to the oxygen partial pressure in the gas, and the oxygen concentration in the flue gas can be calculated using the Nernst formula.

[0031] A flow guide cover 106 is installed in the filter tube 103 , and the flow guide cover 106 is fixedly connected to and communicated with one end of the zirconia tube 105 .

[0032] By adopting the above technical solution, the opening of the guide cover 106 is directed toward the rising part of the flue gas, so as to guide the measured gas into the zirconia tube 105 .

[0033] Working Principle: When using the present invention, first, according to the inner diameter of the smoke exhaust pipe, the knob 4 is used to drive the rotating rod 6 to rotate, and the rotating rod 6 drives the threaded rod 5 to rotate through the bevel gear 7. The threaded rod 5 drives the flange 104 to slide along the slide groove 3 to adjust the position. Then, the detector body 1 is inserted into the smoke exhaust pipe so that the deflector 106 at one end of the zirconia tube 105 is located in the center of the smoke exhaust pipe, which is convenient for detecting smoke. The detector body 1 is then installed on the detection port on the smoke exhaust pipe using the flange 104.

[0034] When a lot of smoke and dust adheres to the filter tube 103, the drive motor 25 is used to drive the drive shaft 24 to rotate, the drive shaft 24 drives the drive gear 22 to rotate, the drive gear 22 drives the gear ring 21 to rotate, and the gear ring 21 drives the cleaning brush 23 to make a circular motion along the filter tube 103 to clean the filter tube 103 (the cleaning brush 23 is a high-temperature resistant steel wire brush) to prevent the filter holes of the filter tube 103 from being blocked.

[0035] Obviously, those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.

Claims

1. A multi-point sampling and measuring device for oxygen content in flue gas at the tail end of a boiler, comprising a detector body (1), characterized in that: The detector body (1) includes a junction box (101), a protective shell (102) is fixedly mounted on one side of the junction box (101), a filter tube (103) is fixedly mounted on one end of the protective shell (102), a cleaning assembly (2) is mounted on the protective shell (102), and the cleaning assembly (2) includes a gear ring (21), the gear ring (21) is rotatably mounted on one end of the protective shell (102), a cleaning brush (23) is fixedly mounted on one side of the gear ring (21), and the bristles of the cleaning brush (23) are in contact with the filter holes of the filter tube (103), a driving shaft (24) is rotatably mounted on the protective shell (102), a driving gear (22) is fixedly mounted on one end of the driving shaft (24), and the driving gear (22) is meshed with the gear ring (21), a driving motor (25) is fixedly mounted on one side of the junction box (101), and the driving motor (25) is fixedly connected to one end of the driving shaft (24).

2. A multi-point sampling and measuring device for oxygen content in boiler tail gas according to claim 1, characterized in that: A flange (104) is slidably mounted on the protective shell (102), and the drive shaft (24) is inserted through the flange (104).

3. The multi-point sampling and measuring device for oxygen content in boiler tail gas according to claim 1, characterized in that: A slide groove (3) is fixedly mounted on the protective shell (102), and the flange (104) is slidably mounted in the slide groove (3).

4. A multi-point sampling and measuring device for oxygen content in boiler tail gas according to claim 3, characterized in that: A threaded rod (5) is rotatably mounted in the slide groove (3), and the threaded rod (5) is threadedly inserted into the flange (104).

5. The multi-point sampling and measuring device for oxygen content in boiler tail gas according to claim 1, characterized in that: A rotating rod (6) is rotatably mounted on one side of the junction box (101) on which the protective shell (102) is mounted, and a knob (4) is fixedly mounted on the bottom end of the rotating rod (6).

6. A multi-point sampling and measuring device for oxygen content in boiler tail gas according to claim 5, characterized in that: The top end of the rotating rod (6) and one end of the threaded rod (5) are both fixedly mounted with a bevel gear (7), and the two bevel gears (7) are meshed.

7. The multi-point sampling and measuring device for oxygen content in boiler tail gas according to claim 1, characterized in that: A zirconia tube (105) is fixedly mounted on one side of the junction box (101) on which the protective shell (102) is mounted, and the zirconia tube (105) is located inside the protective shell (102).

8. The multi-point sampling and measuring device for oxygen content in boiler tail gas according to claim 1, characterized in that: A flow guide cover (106) is installed in the filter tube (103), and the flow guide cover (106) is fixedly connected to and communicated with one end of the zirconia tube (105).

Images