Flue gas detection sampling probe equipment

Abstract

The utility model relates to the technical field of flue gas detection, and particularly discloses flue gas detection sampling probe equipment which comprises a box body, a conveying pipe is horizontally and fixedly arranged in the middle of one side of the box body, a connecting pipe is vertically and upwards fixedly arranged at one end, far away from the box body, of the conveying pipe, and a probe main body is fixedly arranged at the top end of the connecting pipe. The whole probe body is of a hollow circular tubular structure, a flow guide cover is fixedly arranged at the top end of the probe body, a filtering mechanism is fixedly arranged at the top of an inner cavity of the probe body, heating pipes are fixedly wound in the conveying pipe, the connecting pipe and the probe body, a temperature sensor is fixedly arranged in the box body, and the three sets of heating pipes are electrically connected with the temperature sensor. According to the utility model, the heating pipes are fixedly wound in the conveying pipe, the connecting pipe and the probe main body, so that the stability of the temperature in the conveying pipe, the connecting pipe and the probe main body can be ensured, and the problem that the representativeness and the analysis accuracy of a sample are influenced due to a local condensation risk is avoided.

Description

Technical Field

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

[0002] A flue gas sampling probe is a specialized device that is directly installed on a flue, chimney, or process pipeline. Its core function is to continuously and in situ collect representative gas samples in high-temperature, high-dust, high-humidity, and highly corrosive industrial flue gas environments, and to perform primary physical pretreatment on the samples to provide stable gas samples that meet the requirements for downstream analytical instruments.

[0003] In environmental monitoring and industrial process control, accurate sampling and analysis of gas composition within flue gas ducts are crucial. Existing flue gas sampling probes commonly suffer from the following problems during long-term operation: the probe's internal temperature struggles to adapt to fluctuations in flue gas conditions, posing a risk of localized condensation and affecting sample representativeness and analytical accuracy; the filtration mechanism is prone to rapid clogging due to the accumulation of large particles, leading to decreased sampling flow or even failure, requiring frequent shutdowns for manual cleaning and incurring high maintenance costs. Utility Model Content

[0004] In view of the shortcomings of the prior art, this utility model provides a flue gas detection sampling probe device to solve the problems of uneven temperature inside the probe leading to the risk of local condensation and easy clogging of the filter mechanism leading to a decrease in sampling flow.

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

[0006] The aforementioned flue gas detection sampling probe device includes a housing. A delivery pipe is horizontally fixed in the middle of one side of the housing. A connecting pipe is vertically fixed upward at the end of the delivery pipe away from the housing. A probe body is fixed at the top of the connecting pipe. The probe body is a hollow cylindrical structure. A flow guide is fixed at the top of the probe body. A filter mechanism is fixed at the top of the inner cavity of the probe body. Heating tubes are fixedly wound inside the delivery pipe, connecting pipe, and probe body. A temperature sensor is fixedly installed inside the housing. All three sets of heating tubes are electrically connected to the temperature sensor. An air pump is also fixedly installed inside the housing. A sampling tube is fixedly connected to the inlet of the air pump. The sampling tube passes through the side wall of the housing, the delivery pipe, and the connecting pipe. The end of the sampling tube away from the air pump is connected to the inner cavity of the probe body.

[0007] Furthermore, a connecting plate is fixedly installed at the bottom of the connecting pipe, and the end of the conveying pipe away from the box is fixedly connected to the connecting plate. Both the conveying pipe and the connecting pipe are connected to the inner cavity of the connecting plate.

[0008] Furthermore, an air inlet is provided at the top of the probe body, a flow guide is fixedly connected to the air inlet, and an air outlet is provided at the bottom of the probe body. The end of the sampling tube away from the air pump is connected to the inner cavity of the probe body through the air outlet, and the outer diameter of the end of the sampling tube away from the air pump is adapted to the diameter of the air outlet.

[0009] Furthermore, the overall flow guide is hemispherical in shape, and several flow guide holes are evenly and intermittently opened along the circumference of the flow guide. All the flow guide holes are connected to the inner cavity of the probe body through the air inlet.

[0010] Furthermore, the filtering mechanism includes three sets of filter plates that are evenly and spacedly fixedly arranged at the top of the inner cavity of the probe body. The filter plates are generally circular in shape, and the diameter of the filter plates is adapted to the inner diameter of the probe body.

[0011] Furthermore, the uppermost filter plate has several through holes 1 evenly and at intervals, the middle filter plate has several through holes 2 evenly and at intervals, and the lowermost filter plate has several through holes 3 evenly and at intervals, with the diameters of through holes 1, 2 and 3 decreasing sequentially.

[0012] Furthermore, a connecting cavity is provided inside the connecting plate to accommodate the sampling tube, and the delivery tube and connecting tube are both connected to the connecting cavity.

[0013] Furthermore, the connecting plate has a circular plate-like structure, and several bolt holes are evenly spaced and drilled through the connecting plate along its circumference.

[0014] Furthermore, a connecting flange is fixedly installed at one end of the delivery pipe near the box body, and a fastener is fixedly installed in the middle of one side of the box body in conjunction with the connecting flange. The connecting flange and the fastener are fixedly connected, and the middle of both the connecting flange and the fastener are provided with four through holes through which the sampling pipe passes. The sampling pipe passes through two sets of four through holes.

[0015] Furthermore, the connecting flange has several bolt holes 2 evenly spaced along the circumference, and the fastener has several bolt holes 3 through which several bolt holes 2 are drilled. The bolt holes 2 and 3 are all threaded with fixing bolts, and the connecting flange is fixedly connected to the fastener by several fixing bolts.

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

[0017] This invention ensures stable temperatures within the delivery pipe, connecting pipe, and probe body by fixing heating tubes around them, thus avoiding the risk of localized condensation affecting sample representativeness and analytical accuracy. The inclusion of a flow guide and filtration mechanism filters out larger particles and other impurities, while the use of a vacuum pump and sampling tube generates negative pressure to remove blockages from the flow guide and filtration mechanism, ensuring stable flow rate during sampling. 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 Enlarged structural diagram at point B;

[0021] Figure 4 This is a partial structural cross-sectional view of the probe body, air inlet, air guide cover, air guide hole, filter mechanism and heating tube of this utility model;

[0022] Figure 5 This is a partial structural cross-sectional view of the delivery pipe, connecting pipe, heating pipe, sampling pipe, connecting plate, and communicating cavity of this utility model;

[0023] Figure 6 for Figure 5 A magnified structural diagram at point C.

[0024] In the diagram: 1. Housing; 2. Delivery pipe; 3. Connecting pipe; 4. Probe body; 41. Air inlet; 5. Flow guide; 51. Flow guide hole; 6. Filtering mechanism; 61. Filter plate; 62. Through hole one; 63. Through hole two; 64. Through hole three; 7. Heating pipe; 8. Sampling pipe; 9. Connecting plate; 91. Connecting cavity; 92. Bolt hole one; 10. Connecting flange; 11. Fastener; 12. Bolt hole two. Detailed Implementation

[0025] The present invention will now be described and explained in detail with reference to the accompanying drawings.

[0026] Example 1

[0027] like Figure 1-6As shown, the flue gas detection sampling probe device includes a housing 1. A delivery pipe 2 is horizontally fixed in the middle of one side of the housing 1. A connecting pipe 3 is vertically fixed upward at the end of the delivery pipe 2 away from the housing 1. A probe body 4 is fixed at the top of the connecting pipe 3. The probe body 4 is a hollow cylindrical structure. A flow guide shroud 5 is fixed at the top of the probe body 4. A filter mechanism 6 is fixed at the top of the inner cavity of the probe body 4. Heating pipes 7 are fixedly wound inside the delivery pipe 2, the connecting pipe 3, and the probe body 4. A temperature sensor is fixedly installed inside the housing 1. All three sets of heating pipes 7 are electrically connected to the temperature sensor. An air pump is also fixedly installed inside the housing 1. A sampling pipe 8 is fixedly connected to the inlet of the air pump. The sampling pipe 8 passes through the side wall of the housing 1, the delivery pipe 2, and the connecting pipe 3. The end of the sampling pipe 8 away from the air pump is connected to the inner cavity of the probe body 4.

[0028] With the above setup, the outlet of the vacuum pump is connected to a detection device; the temperature sensor is electrically connected to a temperature control device. The temperature sensor converts the temperature inside the delivery pipe 2, connecting pipe 3, and probe body 4 into an electrical signal and transmits it to the temperature control device. According to the actual situation, the temperature control device adjusts the temperature of the three sets of heating tubes 7 respectively, thereby adjusting the temperature inside the delivery pipe 2, connecting pipe 3, and probe body 4, ensuring the stability of the temperature inside the delivery pipe 2, connecting pipe 3, and probe body 4, and preventing the flue gas from condensing on the inner walls of the delivery pipe 2, connecting pipe 3, and probe body 4. This utility model, by fixing heating tubes 7 around the delivery pipe 2, connecting pipe 3, and probe body 4, can ensure the stability of the temperature inside the delivery pipe 2, connecting pipe 3, and probe body 4, avoiding the problem of sample representativeness and analytical accuracy being affected by the risk of local condensation. By setting up a flow guide hood 5 and a filter mechanism 6, larger particles and other impurities can be filtered out. Furthermore, by setting up a vacuum pump and a sampling pipe 8, negative pressure can be generated to remove blockages in the flow guide hood 5 and filter mechanism 6, ensuring the stability of the flow rate during sampling.

[0029] A connecting plate 9 is fixedly installed at the bottom end of the connecting pipe 3. The end of the conveying pipe 2 away from the box 1 is fixedly connected to the connecting plate 9, and both the conveying pipe 2 and the connecting pipe 3 are connected to the inner cavity of the connecting plate 9.

[0030] The top of the probe body 4 is provided with an air inlet 41, the flow guide 5 is fixedly connected to the air inlet 41, the bottom of the probe body 4 is provided with an air outlet, the end of the sampling tube 8 away from the air pump is connected to the inner cavity of the probe body 4 through the air outlet, and the outer diameter of the end of the sampling tube 8 away from the air pump is adapted to the diameter of the air outlet.

[0031] The flow guide 5 has a hemispherical structure. Several flow guide holes 51 are evenly and intermittently opened along the circumference of the flow guide 5. The flow guide holes 51 are all connected to the inner cavity of the probe body 4 through the air inlet 41.

[0032] With the above configuration, the flow guide hood 5 has a hemispherical structure with a smooth curved surface at the top, which can smoothly guide the frontal impact of the flue gas flow to the surrounding area, significantly reducing the local resistance coefficient and avoiding the formation of a high-pressure stagnation zone, thereby reducing the frontal deposition of large particles. The flow guide hood 5 has several flow guide holes 51 evenly and intermittently opened along the circumference, which ensures that the airflow entering the probe body 4 from all directions is uniform. In addition, the flow guide holes 51 can block large particles that may exist in the pipe, preventing them from directly entering the probe body 4 and impacting the filter mechanism and causing damage, and can also prevent large particles from clogging the filter mechanism.

[0033] The filtering mechanism 6 includes three sets of filter plates 61 that are evenly and spacedly fixedly arranged at the top of the inner cavity of the probe body 4. The filter plates 61 are generally circular in shape, and the diameter of the filter plates 61 is adapted to the inner diameter of the probe body 4.

[0034] The filter plate 61 at the top has several through holes 62 evenly spaced and interspersed, the filter plate 61 in the middle has several through holes 63 evenly spaced and interspersed, and the filter plate 61 at the bottom has several through holes 64 evenly spaced and interspersed. The diameters of the through holes 62, 63 and 64 decrease in that order.

[0035] With the above arrangement, the three sets of filter plates 61 are arranged at intervals from top to bottom, and the diameters of through holes 1 62, through holes 2 63 and through holes 3 64 decrease in sequence, which can realize gradient filtration from coarse to fine and improve the filtration capacity of the filter mechanism 6.

[0036] The connecting plate 9 has a connecting cavity 91 that is connected to the sampling tube 8. The delivery tube 2 and the connecting tube 3 are both connected to the connecting cavity 91.

[0037] The connecting plate 9 has a circular plate-like structure, and several bolt holes 92 are evenly spaced and perforated along the circumference of the connecting plate 9.

[0038] With the above setup, the connecting plate 9 can be fixedly connected to the flue gas duct by setting several bolt holes 92, thus fixing the connecting plate 9 and the entire device and ensuring the stability of the device during the sampling process.

[0039] A connecting flange 10 is fixedly installed at one end of the conveying pipe 2 near the box body 1. A fastener 11 is fixedly installed in the middle of one side of the box body 1 in conjunction with the connecting flange 10. The connecting flange 10 and the fastener 11 are fixedly connected, and the middle of the connecting flange 10 and the fastener 11 are both connected to the sampling pipe 8 through which four through holes are opened. The sampling pipe 8 passes through two sets of four through holes.

[0040] The connecting flange 10 has several bolt holes 12 evenly spaced along its circumference. The fastener 11 has several bolt holes 3 through which the bolt holes 12 are inserted. The bolt holes 12 and the bolt holes 3 are all threaded with fixing bolts. The connecting flange 10 is fixedly connected to the fastener 11 by the fixing bolts.

[0041] Working principle and process:

[0042] In use, the probe body 4 is inserted into the flue gas duct, and the connecting plate 9 is fixedly connected to the flue gas duct, thus securing the connecting plate 9 and the entire device. Then, the suction pump is started, and the flue gas enters the probe body 4 evenly through the air inlet 41 via several guide holes 51 on the guide shroud 5. The guide shroud 5 blocks any large particles that may be present in the flue gas duct. At the same time, the temperature of the sampled gas is monitored in real time by a temperature sensor, and the temperature of the delivery pipe 2, connecting pipe 3, and probe body 4 is converted into an electrical signal and transmitted to the temperature control device. According to the actual situation, the temperature of the three sets of heating tubes 7 is adjusted by the temperature control device, thereby adjusting the temperature of the delivery pipe 2, connecting pipe 3, and probe body 4 to prevent flue gas condensation. After entering the probe body 4, the flue gas passes through several through holes 62, 63, and 64 from top to bottom, undergoing gradient filtration from coarse to fine. The filtered flue gas enters the sampling pipe 8 through the air outlet and is then discharged into the detection device by the suction pump for detection.

Claims

1. A flue gas detection and sampling probe device, comprising a housing (1), characterized in that, A delivery pipe (2) is fixed horizontally in the middle of one side of the box (1). A connecting pipe (3) is fixed vertically upward at the end of the delivery pipe (2) away from the box (1). A probe body (4) is fixed at the top of the connecting pipe (3). The probe body (4) is a hollow cylindrical structure. A flow guide (5) is fixed at the top of the probe body (4). A filter mechanism (6) is fixed at the top of the inner cavity of the probe body (4). A heating pipe (7) is fixedly wound inside the delivery pipe (2), the connecting pipe (3), and the probe body (4). A temperature sensor is fixedly installed inside the box (1). All three sets of heating pipes (7) are electrically connected to the temperature sensor. A vacuum pump is also fixedly installed inside the box (1). A sampling pipe (8) is fixedly connected to the inlet of the vacuum pump. The sampling pipe (8) passes through the side wall of the box (1), the delivery pipe (2), and the connecting pipe (3). The end of the sampling pipe (8) away from the vacuum pump is connected to the inner cavity of the probe body (4).

2. The flue gas detection and sampling probe device according to claim 1, characterized in that, A connecting plate (9) is fixedly installed at the bottom end of the connecting pipe (3). The end of the conveying pipe (2) away from the box (1) is fixedly connected to the connecting plate (9), and both the conveying pipe (2) and the connecting pipe (3) are connected to the inner cavity of the connecting plate (9).

3. The flue gas detection and sampling probe device according to claim 1, characterized in that, An air inlet (41) is provided at the top of the probe body (4), and a flow guide (5) is fixedly connected to the air inlet (41). An air outlet is provided at the bottom of the probe body (4). The end of the sampling tube (8) away from the air pump is connected to the inner cavity of the probe body (4) through the air outlet, and the outer diameter of the end of the sampling tube (8) away from the air pump is adapted to the diameter of the air outlet.

4. The flue gas detection and sampling probe device according to claim 3, characterized in that, The flow guide (5) has a hemispherical structure. Several flow guide holes (51) are evenly and intermittently opened along the circumference of the flow guide (5). The flow guide holes (51) are all connected to the inner cavity of the probe body (4) through the air inlet (41).

5. The flue gas detection and sampling probe device according to claim 1, characterized in that, The filtering mechanism (6) includes three sets of filter plates (61) that are evenly and spacedly fixedly arranged at the top of the inner cavity of the probe body (4). The filter plates (61) are generally circular in shape, and the diameter of the filter plates (61) is adapted to the inner diameter of the probe body (4).

6. The flue gas detection and sampling probe device according to claim 5, characterized in that, The filter plate (61) at the top has several through holes (62) evenly spaced and interspersed. The filter plate (61) in the middle has several through holes (63) evenly spaced and interspersed. The filter plate (61) at the bottom has several through holes (64) evenly spaced and interspersed. The diameters of the through holes (62), (63) and (64) decrease in sequence.

7. The flue gas detection and sampling probe device according to claim 1, characterized in that, The connecting plate (9) is equipped with a connecting cavity (91) for the sampling tube (8), and the delivery tube (2) and the connecting tube (3) are connected to the connecting cavity (91).

8. The flue gas detection and sampling probe device according to claim 1, characterized in that, The connecting plate (9) has a circular plate structure. Several bolt holes (92) are evenly and intermittently opened along the circumference of the connecting plate (9).

9. The flue gas detection and sampling probe device according to claim 1, characterized in that, A connecting flange (10) is fixedly installed at one end of the conveying pipe (2) near the box body (1). A fastener (11) is fixedly installed in the middle of one side of the box body (1) in conjunction with the connecting flange (10). The connecting flange (10) and the fastener (11) are fixedly connected. The middle of the connecting flange (10) and the fastener (11) are both connected to the sampling pipe (8) through which four through holes are opened. The sampling pipe (8) passes through two sets of four through holes.

10. The flue gas detection and sampling probe device according to claim 9, characterized in that, The connecting flange (10) has several bolt holes 2 (12) evenly spaced along the circumference. The fastener (11) has several bolt holes 3 through which several bolt holes 2 (12) are opened. The bolt holes 2 (12) and several bolt holes 3 are threaded with fixing bolts. The connecting flange (10) is fixedly connected by several fixing bolts and fastener (11).

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