Dust detection device for flue gas pipeline

Abstract

The utility model relates to the technical field of flue gas detection, and particularly discloses a dust detection device for a flue gas pipeline, which comprises a box body, a connecting mechanism is fixedly arranged on the side wall of the box body, a heat tracing sampling pipe penetrates through and is fixedly arranged in the connecting mechanism, and a sampling probe is fixedly arranged at one end, far away from the box body, of the heat tracing sampling pipe. A protection port is fixedly arranged at one end, far away from the heat tracing sampling pipe, of the sampling probe, the whole protection port is of a circular truncated cone-shaped structure, a plurality of flow guide grooves are uniformly formed in the protection port in the circumferential direction at intervals in a penetrating manner, and a gas conveying pipe I, a gas conveying pipe II and a gas conveying pipe III are uniformly and fixedly arranged on the side wall of the box body at intervals. By arranging the heat tracing sampling pipe, heat tracing can be achieved in the whole process, and it is avoided that the temperature of smoke drops in the conveying process, and condensate water is generated; the sampling probe can be prevented from being directly exposed in high-speed flue gas by arranging the protective port and the plurality of diversion trenches, and the flue gas is prevented from directly impacting and blocking the sampling probe.

Description

Technical Field

[0001] This utility model relates to the field of flue gas detection technology, and specifically discloses a dust detection device for flue gas pipelines. Background Technology

[0002] In industrial production processes such as thermal power generation, metallurgy, and chemical industry, the flue gas produced by combustion usually contains a large number of dust particles. In order to monitor pollution emissions, optimize combustion efficiency, and meet environmental protection regulations, it is necessary to detect the dust concentration in the flue gas in real time and accurately. Existing dust detection devices usually adopt an extraction sampling method, that is, to extract flue gas samples from the flue through a sampling probe and send them to an analyzer for detection.

[0003] However, existing dust detection devices operate in high-temperature, high-humidity, and high-dust flue environments for extended periods, and generally face the following problems: 1. Poor sample representativeness: The sampling probe is directly exposed to high-speed flue gas, making it prone to blockage by large particles or scale, or the samples collected may not be representative due to uneven flue gas flow; 2. Heating and blockage issues: To prevent condensation of high-humidity flue gas in the sampling tube, heating is required. Traditional heating pipes and purging and cleaning pipes are messy, easily damaged, and the cleaning effect is incomplete; 3. Inconvenient installation and maintenance: The connection structure between the device and the flue wall and internal detection elements is complex, making disassembly difficult and inconvenient for daily maintenance, calibration, and probe replacement. Utility Model Content

[0004] In view of the shortcomings of the prior art, this utility model provides a dust detection device for flue gas ducts to solve the problems of poor sampling representativeness, obvious heat tracing and blockage problems, and inconvenient installation and maintenance.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] The dust detection device for flue gas ducts includes a housing. A connecting mechanism is fixedly installed on the side wall of the housing. A heat-tracing sampling tube is fixedly installed through and within the connecting mechanism. A sampling probe is fixedly installed at the end of the heat-tracing sampling tube away from the housing. A protective port is fixedly installed at the end of the sampling probe away from the heat-tracing sampling tube. The protective port has a frustum-shaped structure and several guide grooves are evenly and intermittently opened along the circumference of the protective port. Gas supply pipe one, gas supply pipe two, and gas supply pipe three are evenly and intermittently fixedly installed on the side wall of the housing. Gas supply pipe one, gas supply pipe two, and gas supply pipe three all pass through the connecting mechanism, and the ends of gas supply pipe one, gas supply pipe two, and gas supply pipe three away from the housing are all fixedly connected to the outer surface of the heat-tracing sampling tube away from the housing.

[0007] Furthermore, the connection mechanism includes a connecting flange 1 fixedly installed on the side wall of the box. The connecting flange 1 has an overall annular structure, and a number of bolt holes 1 are evenly and intermittently opened along the circumferential direction of the connecting flange 1. Each of the bolt holes 1 is threaded with a fixing bolt. The connecting flange 1 is fixedly connected to the box through the number of fixing bolts.

[0008] Furthermore, a connecting cylinder is fixedly installed on the side of the connecting flange one away from the housing, and a connecting flange two is fixedly installed at the end of the connecting cylinder one away from the connecting flange one. The connecting flange two has an overall annular structure, and several bolt holes two are evenly and intermittently opened along the circumferential direction on the connecting flange two.

[0009] Furthermore, a second connecting cylinder is fixedly installed inside the first connecting cylinder. One end of the second connecting cylinder passes through the first connecting flange and is fixedly connected to the side wall of the box. The end of the heat tracing sampling tube near the box passes through the second connecting cylinder and the side wall of the box and extends into the box.

[0010] Furthermore, a threaded cap is fixedly provided on the outer surface of the heat tracing sampling tube in conjunction with the connecting cylinder two. The outer surface of the connecting cylinder two away from the box body is provided with an external thread in conjunction with the threaded cap. The threaded cap is sleeved on the outer surface of the connecting cylinder two away from the box body through the external thread.

[0011] Furthermore, a limiting block 1 is fixedly installed on the side wall of the box. The limiting block 1 is provided with three sets of through holes that are evenly and intermittently opened to cooperate with the first, second and third air supply pipes. The outer surface of the connecting cylinder 1 is provided with three sets of limiting tubes that are fixedly installed through it. The first, second and third air supply pipes are respectively connected to the three sets of through holes and the three sets of limiting tubes.

[0012] Furthermore, dust detection devices and blowers are fixedly installed at intervals inside the box. One end of the heat tracing sampling tube extends into the box and is fixedly connected to the input end of the dust detection device. The ends of air supply pipe one, air supply pipe two, and air supply pipe three near the box all penetrate the side wall of the box and are fixedly connected to the output end of the blower.

[0013] Furthermore, a limiting block 2 is fixedly sleeved on the outer surface of the sampling probe near the heat tracing sampling tube. Three sets of fixed tubes are respectively installed on the limiting block 2, which are connected to the first, second and third gas supply pipes. The ends of the first, second and third gas supply pipes near the sampling probe are respectively fixedly connected to the three sets of fixed tubes.

[0014] Furthermore, the end of the sampling probe furthest from the heated sampling tube has an overall C-shaped structure, and several guide channels have an overall spiral structure, with all of the guide channels connected to the sampling probe.

[0015] Furthermore, hinges are fixedly installed on both sides of the top of the side wall near the connecting mechanism of the housing, and a cover is fixedly installed on the top of the two hinges. The cover is rotatably connected to the top of the housing through the two hinges.

[0016] The beneficial effects of this utility model are:

[0017] This invention features a heated sampling tube that provides continuous heating, preventing condensation from forming as the flue gas temperature drops during transport. Protective ports and several guide channels prevent the sampling probe from being directly exposed to the high-speed flue gas, thus preventing direct impact and blockage. Three gas supply pipes (pipe 1, pipe 2, and pipe 3) purge the end of the sampling probe furthest from the heated sampling tube, further enhancing the cleaning and anti-clogging effect. A connecting mechanism allows for quick docking and sealing between the housing and the flue gas duct, facilitating easy disassembly and replacement or maintenance. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 for Figure 1 Enlarged structural diagram at point A;

[0020] Figure 3 for Figure 1 A magnified structural diagram at point B in the middle.

[0021] In the diagram: 1. Box body; 2. Connecting mechanism; 21. Connecting flange one; 22. Fixing bolt; 23. Connecting cylinder one; 24. Connecting flange two; 25. Bolt hole two; 26. Connecting cylinder two; 27. Threaded cap; 28. Limiting tube; 3. Heat tracing sampling tube; 4. Sampling probe; 5. Protective port; 6. Gas supply pipe one; 7. Gas supply pipe two; 8. Gas supply pipe three; 9. Limiting block one; 10. Limiting block two; 11. Fixing tube; 12. Hinge; 13. Cover. Detailed Implementation

[0022] The present invention will now be described and explained in detail with reference to the accompanying drawings.

[0023] Example 1

[0024] like Figure 1-3As shown, the dust detection device for flue gas ducts includes a housing 1. A connecting mechanism 2 is fixedly installed on the side wall of the housing 1. A heat-tracing sampling tube 3 is fixedly installed through the connecting mechanism 2. A sampling probe 4 is fixedly installed at the end of the heat-tracing sampling tube 3 away from the housing 1. A protective port 5 is fixedly installed at the end of the sampling probe 4 away from the heat-tracing sampling tube 3. The protective port 5 has a frustum-shaped structure, and several guide grooves are evenly and intermittently opened along the circumference of the protective port 5. A gas supply pipe 1 6, a gas supply pipe 2 7, and a gas supply pipe 3 8 are evenly and intermittently fixedly installed on the side wall of the housing 1. All three gas supply pipes 1 6, 2 7, and 3 8 pass through the connecting mechanism 2, and the ends of the gas supply pipes 1 6, 2 7, and 3 8 away from the housing 1 are all fixedly connected to the outer surface of the heat-tracing sampling tube 3 on the side away from the housing 1.

[0025] With the above configuration, the heating sampling tube 3 has an integrated heating wire in its wall and an insulation layer on its outer surface to ensure stable temperature inside the tube during sampling. The heating sampling tube 3 provides continuous heating, preventing condensation from forming as the flue gas temperature drops during transport. The protective port 5 and several guide channels prevent the sampling probe 4 from being directly exposed to high-speed flue gas, thus preventing direct impact and blockage. The gas supply pipes 6, 7, and 8 allow for purging of the end of the sampling probe 4 furthest from the heating sampling tube 3, further improving the cleaning and anti-clogging effect. The connecting mechanism 2 enables quick docking and sealing between the housing 1 and the flue gas duct, facilitating easy disassembly and replacement or maintenance.

[0026] The connecting mechanism 2 includes a connecting flange 21 fixedly installed on the side wall of the housing 1. The connecting flange 21 has an overall ring-shaped structure, and a number of bolt holes are evenly spaced along the circumference of the connecting flange 21. Each of the bolt holes is threaded with a fixing bolt 22. The connecting flange 21 is fixedly connected to the housing 1 by the fixing bolts 22.

[0027] A connecting sleeve 23 is fixedly installed on the side of the connecting flange 21 away from the housing 1. A connecting flange 24 is fixedly installed on the end of the connecting sleeve 23 away from the connecting flange 21. The connecting flange 24 has an overall ring-shaped structure, and several bolt holes 25 are evenly and intermittently opened along the circumferential direction of the connecting flange 24.

[0028] With the above setup, during installation, by screwing several fixing bolts 22 into several bolt holes 1 respectively, the connecting flange 21 and the housing 1 are fixedly connected; then by screwing several bolts into several bolt holes 25 respectively, the connecting flange 24 and the flue gas duct are fixedly connected, thereby enabling rapid docking and sealing between the housing 1 and the flue gas duct.

[0029] A second connecting cylinder 26 is fixedly installed inside the first connecting cylinder 23. One end of the second connecting cylinder 26 passes through the first connecting flange 21 and is fixedly connected to the side wall of the box 1. The end of the heat tracing sampling tube 3 near the box 1 passes through the second connecting cylinder 26 and the side wall of the box 1 and extends into the box 1.

[0030] The outer surface of the heat tracing sampling tube 3 is fitted with a threaded cap 27 that is fixedly installed on the connecting tube 26. The outer surface of the connecting tube 26 away from the box 1 is fitted with an external thread that is provided on the threaded cap 27. The threaded cap 27 is fitted onto the outer surface of the connecting tube 26 away from the box 1 through the external thread.

[0031] With the above setup, the heat tracing sampling tube 3 is connected to the connecting tube 26 by the threaded cap 27, which facilitates disassembly and improves the efficiency of daily maintenance, calibration and probe replacement.

[0032] Limiting block 19 is fixedly installed on the side wall of box 1. Three sets of through holes are evenly and intermittently opened on limiting block 19 to cooperate with air supply pipe 16, air supply pipe 27 and air supply pipe 38 respectively. Three sets of limiting tubes 28 are fixedly installed on the outer surface of connecting cylinder 123. Air supply pipe 16, air supply pipe 27 and air supply pipe 38 pass through the three sets of through holes and the three sets of limiting tubes 28 respectively.

[0033] With the above settings, the gas pipe 6, gas pipe 7, and gas pipe 8 can be fixed and limited in an orderly manner throughout the entire process by setting the limiting block 9, which avoids the entanglement and wear of the pipeline and improves the service life of the gas pipe 6, gas pipe 7, and gas pipe 8.

[0034] The chamber 1 is equipped with a dust detection device and a blower, which are fixedly installed at intervals. The end of the heat tracing sampling tube 3 extending into the chamber 1 is fixedly connected to the input end of the dust detection device. The ends of the first air supply pipe 6, the second air supply pipe 7, and the third air supply pipe 8 near the chamber 1 all penetrate the side wall of the chamber 1 and are fixedly connected to the output end of the blower.

[0035] With the above setup, the sampled flue gas is transported to the dust detection device for detection through the heated sampling tube 3; when the blower is started, the end of the sampling probe 4 away from the heated sampling tube 3 is purged through the air supply pipe 1 6, air supply pipe 2 7 and air supply pipe 3 8 to improve the dust removal and anti-clogging effect.

[0036] A limiting block 2 10 is fixedly sleeved on the outer surface of the sampling probe 4 near the heat tracing sampling tube 3. Three sets of fixed tubes 11 are respectively installed on the limiting block 2 10, which are connected to the gas supply pipe 1 6, gas supply pipe 2 7 and gas supply pipe 3 8. The ends of the gas supply pipe 1 6, gas supply pipe 2 7 and gas supply pipe 3 8 near the sampling probe 4 are respectively fixedly connected to the three sets of fixed tubes 11.

[0037] By setting up the above-mentioned limit block 10 and three sets of fixed pipes 11, the stability of the purging process can be guaranteed, and the long-term operational reliability of the purging work can be improved.

[0038] The end of the sampling probe 4 furthest from the heat-tracing sampling tube 3 has an overall C-shaped structure, and several guide grooves have an overall spiral structure, and several guide grooves are connected to the sampling probe 4.

[0039] With the above settings, by using a C-shaped sampling probe 4 in conjunction with several spiral guide grooves, flue gas can be stably collected from multiple angles, reducing sampling errors caused by flue gas turbulence, making the samples more representative, and avoiding the problem of flue gas directly impacting the sampling probe 4, causing it to be damaged or blocked.

[0040] Hinges 12 are fixedly installed on both sides of the top of the side wall near the connecting mechanism 2 of the housing 1. A cover 13 is fixedly installed on the top of the two hinges 12. The cover 13 is rotatably connected to the top of the housing 1 through the two hinges 12.

[0041] With the above-mentioned setup, by setting the hinge 12 and the cover 13, the dust detection device and blower inside the housing 1 can be inspected and replaced by opening the cover 13. The operation is simple and further improves work efficiency.

Claims

1. A dust detection device for flue gas ducts, comprising a housing (1), characterized in that, A connecting mechanism (2) is fixedly installed on the side wall of the box (1). A heat tracing sampling tube (3) is fixedly installed through the connecting mechanism (2). A sampling probe (4) is fixedly installed at the end of the heat tracing sampling tube (3) away from the box (1). A protective port (5) is fixedly installed at the end of the sampling probe (4) away from the heat tracing sampling tube (3). The protective port (5) is in the shape of a frustum. Several guide grooves are evenly and intermittently opened along the circumference inside the protective port (5). A gas supply pipe one (6), a gas supply pipe two (7), and a gas supply pipe three (8) are evenly and intermittently fixedly installed on the side wall of the box (1). The gas supply pipe one (6), the gas supply pipe two (7), and the gas supply pipe three (8) all pass through the connecting mechanism (2). The ends of the gas supply pipe one (6), the gas supply pipe two (7), and the gas supply pipe three (8) away from the box (1) are all fixedly connected to the outer surface of the heat tracing sampling tube (3) away from the box (1).

2. The dust detection device for flue gas ducts according to claim 1, characterized in that, The connecting mechanism (2) includes a connecting flange (21) fixedly installed on the side wall of the box (1). The connecting flange (21) is in the shape of a ring, and a number of bolt holes are evenly and intermittently opened along the circumference of the connecting flange (21). Each of the bolt holes is threaded with a fixing bolt (22). The connecting flange (21) is fixedly connected to the box (1) by the fixing bolts (22).

3. The dust detection device for flue gas ducts according to claim 2, characterized in that, A connecting sleeve (23) is fixedly installed on the side of the connecting flange (21) away from the box (1). A connecting flange (24) is fixedly installed on the end of the connecting sleeve (23) away from the connecting flange (21). The connecting flange (24) is in the shape of a ring, and several bolt holes (25) are evenly and intermittently opened along the circumferential direction on the connecting flange (24).

4. The dust detection device for flue gas ducts according to claim 3, characterized in that, A connecting tube 2 (26) is fixedly installed inside the connecting tube 1 (23). One end of the connecting tube 2 (26) passes through the connecting flange 1 (21) and is fixedly connected to the side wall of the box (1). The end of the heat tracing sampling tube (3) near the box (1) passes through the connecting tube 2 (26) and the side wall of the box (1) and extends into the box (1).

5. The dust detection device for flue gas ducts according to claim 4, characterized in that, The outer surface of the heat tracing sampling tube (3) is fitted with a threaded cap (27) fixedly installed on the connecting tube two (26). The outer surface of the connecting tube two (26) away from the box (1) is fitted with the threaded cap (27) with an external thread. The threaded cap (27) is fitted onto the outer surface of the connecting tube two (26) away from the box (1) through the external thread.

6. The dust detection device for flue gas ducts according to claim 3, characterized in that, Limiting block 1 (9) is fixedly installed on the side wall of the box (1). Three sets of through holes are evenly and intermittently opened on the limiting block 1 (9) to cooperate with the gas supply pipe 1 (6), gas supply pipe 2 (7) and gas supply pipe 3 (8). Three sets of limiting tubes (28) are fixedly installed on the outer surface of the connecting cylinder 1 (23). The gas supply pipe 1 (6), gas supply pipe 2 (7) and gas supply pipe 3 (8) pass through the three sets of through holes and the three sets of limiting tubes (28) respectively.

7. The dust detection device for flue gas ducts according to claim 4, characterized in that, The chamber (1) is equipped with a dust detection device and a blower at intervals and fixedly installed inside. The end of the heat tracing sampling tube (3) extending into the chamber (1) is fixedly connected to the input end of the dust detection device. The ends of the first gas supply pipe (6), the second gas supply pipe (7), and the third gas supply pipe (8) near the chamber (1) all penetrate the side wall of the chamber (1) and are fixedly connected to the output end of the blower.

8. The dust detection device for flue gas ducts according to claim 1, characterized in that, The sampling probe (4) is fixedly fitted with a limiting block two (10) on the outer surface of the side near the heat tracing sampling tube (3). The limiting block two (10) is fitted with three sets of fixed tubes (11) that are connected to the gas supply pipe one (6), gas supply pipe two (7) and gas supply pipe three (8) respectively. The ends of the gas supply pipe one (6), gas supply pipe two (7) and gas supply pipe three (8) near the sampling probe (4) are fixedly connected to the three sets of fixed tubes (11) respectively.

9. The dust detection device for flue gas ducts according to claim 1, characterized in that, The end of the sampling probe (4) away from the heat-tracing sampling tube (3) is C-shaped, and the several guide grooves are spiral-shaped, and the several guide grooves are connected to the sampling probe (4).

10. The dust detection device for flue gas ducts according to claim 1, characterized in that, Hinges (12) are fixedly installed on both sides of the top of the side wall of the box (1) near the connecting mechanism (2). A cover (13) is fixedly installed on the top of the two hinges (12). The cover (13) is rotatably connected to the top of the box (1) through the two hinges (12).

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