Exhaust smoke waste heat monitoring device for thermal power plant

Abstract

The utility model relates to the technical field of thermal power plants, and discloses a thermal power plant smoke exhaust waste heat monitoring device which comprises a monitoring equipment shell, a temperature sensor is fixedly installed in the monitoring equipment shell, a sampling assembly is arranged on the monitoring equipment shell and comprises a connecting pipe, and the connecting pipe is arranged on the monitoring equipment shell. An extension pipe is arranged on the connecting pipe, an installation pipe is fixedly installed on the extension pipe, a first sampling pipe is arranged on one side of the installation pipe, a standby side connecting pipe and a second sampling pipe are arranged on one side of the installation pipe, and covering assemblies are arranged on the second sampling pipe and the first sampling pipe. By arranging the covering assembly, a servo motor on a sampling pipe II is controlled to start and drive a driving gear to rotate and is matched with a movable rack and a synchronous belt to drive six covering plates to be opened towards the outer side, and at the moment, flue gas can enter the monitoring equipment shell through the sampling pipe II and a side connecting pipe to carry out temperature detection; and normal and uninterrupted flue gas preheating monitoring is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal power plants, in particular to a smoke exhaust waste heat monitoring device for thermal power plants. Background Art

[0002] A thermal power plant is a factory that uses combustibles (such as coal) as fuel to produce electricity. Usually, the flue gas of a thermal power plant needs to be heat exchanged first, and then discharged through the chimney. During the exhaust process, the temperature of the flue gas usually needs to be monitored in real time to ensure full utilization of energy.

[0003] Usually, when the monitoring equipment is performing residual heat monitoring on the flue gas, the exhaust flue gas is collected through a sampling tube, and the temperature of the flue gas is detected by a temperature sensor. The detected data is then transmitted to the processing system for data analysis and processing. The flue gas contains a lot of particulate matter, which is collected by the sampling tube and enters the equipment. After long-term use, more and more particulate matter will accumulate inside the equipment or in the sampling tube, and eventually blockage may occur. Once the sampling tube is blocked, it will be difficult for the monitoring equipment to perform normal flue gas collection and detection work, and the residual heat monitoring will also be interrupted.

[0004] Therefore, we propose a smoke exhaust waste heat monitoring device for thermal power plants. Utility Model Content

[0005] The utility model mainly solves the technical problems existing in the above-mentioned prior art and provides a smoke exhaust waste heat monitoring device for a thermal power plant.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a thermal power plant exhaust waste heat monitoring device, comprising a monitoring device housing, a temperature sensor is fixedly installed inside the monitoring device housing, a sampling assembly is arranged on the monitoring device housing, the sampling assembly comprises a connecting pipe, the connecting pipe is arranged on the monitoring device housing, an extension pipe is arranged on the connecting pipe, a mounting pipe is fixedly installed on the extension pipe, a sampling pipe 1 is arranged on one side of the mounting pipe, a side pipe for backup and a sampling pipe 2 are arranged on one side of the mounting pipe, and a covering assembly is arranged on the sampling pipe 2 and the sampling pipe 1;

[0007] The covering assembly includes an external sleeve, which is fixedly mounted on the corresponding sampling tube 1 and sampling tube 2. Six covering plates are movably mounted on one side of the external sleeve, and the central angle of the covering plates is 60°.

[0008] Preferably, a signal receiving module is fixedly mounted on the housing of the monitoring device, and a detachable cover is provided on the housing of the monitoring device, and the detachable cover is threadedly connected to the housing of the monitoring device via bolts.

[0009] Preferably, a filter is fixedly installed inside the sampling tube 1, and a filter is also fixedly installed inside the sampling tube 2. A flow meter is fixedly installed inside the sampling tube 1, and a flow meter is also fixedly installed inside the sampling tube 2.

[0010] Preferably, the connecting pipe is connected to the monitoring equipment housing through flanges and bolts, the extension pipe is connected to the connecting pipe through flanges and bolts, the sampling tube is connected to the mounting pipe through flanges and bolts, and the side pipe is connected to the mounting pipe through flanges and bolts.

[0011] Preferably, a connecting elbow is provided between the side pipe and sampling tube 2, and both ends of the connecting elbow are respectively connected to the side pipe and one end of sampling tube 2 through flanges and bolts, and a covering assembly is provided on one end of sampling tube 1 and sampling tube 2.

[0012] Preferably, the covering assembly also includes a movable rack, which is fixedly mounted on the covering plate and slidably mounted on an external sleeve. The external sleeve is provided with a mounting hole for connecting the movable rack. A driving gear is rotatably mounted on one side of the movable rack, and the driving gear is meshed with the movable rack. A synchronous belt is arranged between the six driving gears.

[0013] Preferably, the covering assembly further comprises a connecting shaft, which is arranged on one side of the driving gear, the connecting shaft is fixedly connected to the external sleeve, and the connecting shaft is rotationally connected to the driving gear.

[0014] The utility model provides a smoke exhaust waste heat monitoring device for a thermal power plant, which has the following improvements and advantages compared with the prior art: by providing a covering component, when it is detected that the sampling tube 1 is blocked, the servo motor on one side of the sampling tube 1 is controlled to start and drive one of the driving gears to rotate, and through the cooperation of a synchronous belt and a movable rack, six covering plates are driven to move toward the middle position to cover from one side of the sampling tube 1, and the sampling tube 1 can be cleaned and maintained manually later, and the valve on the sampling tube 2 is opened synchronously, and the servo motor on the sampling tube 2 is controlled to start and drive the driving gear to rotate and cooperate with the movable rack and the synchronous belt to drive the six covering plates to open outwards, at this time, the smoke can enter the inner shell of the monitoring equipment through the sampling tube 2 and the side pipe for temperature detection, thereby ensuring the normal and uninterrupted monitoring of the smoke preheating. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings described below are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0016] Figure 1 A schematic diagram of the structure of a thermal power plant exhaust waste heat monitoring device proposed by the utility model;

[0017] Figure 2 A schematic diagram of the internal structure of the housing of a monitoring device in a thermal power plant exhaust waste heat monitoring device proposed by the utility model;

[0018] Figure 3 A schematic diagram of the installation of a covering component in a smoke exhaust waste heat monitoring device for a thermal power plant proposed by the utility model;

[0019] Figure 4 This is a schematic diagram of the internal structure of a sampling tube 1 in a thermal power plant exhaust waste heat monitoring device proposed by the utility model;

[0020] Figure 5 The present invention is a schematic structural diagram of a covering component in a thermal power plant exhaust waste heat monitoring device.

[0021] Legend:

[0022] 1. Monitoring equipment housing; 2. Signal receiving module; 3. Removable cover; 4. Temperature sensor; 5. Connecting pipe; 6. Extension pipe; 7. Installation pipe; 8. Sampling pipe 1; 9. Side pipe; 10. Sampling pipe 2; 11. Connecting elbow; 12. Filter; 13. Flow meter; 14. External sleeve; 15. Cover plate; 16. Movable rack; 17. Driving gear; 18. Connecting shaft. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] A thermal power plant exhaust waste heat monitoring device, such as Figure 1 - Figure 5As shown, it includes a monitoring device housing 1, a signal receiving module 2 is fixedly installed on the monitoring device housing 1, and the signal receiving module 2 is connected to the signal of the external data analysis system. A temperature sensor 4 is fixedly installed inside the monitoring device housing 1, and the temperature sensor 4 can monitor the flue gas temperature. A detachable cover plate 3 is provided on the monitoring device housing 1, and the detachable cover plate 3 is threadedly connected to the monitoring device housing 1 through bolts. A sampling component is provided on the monitoring device housing 1, and the sampling component can perform real-time sampling of flue gas. The sampling component includes a connecting pipe 5, which is provided on the monitoring device housing 1, and the connecting pipe 5 is connected to the monitoring device housing 1 through flanges and bolts. An extension pipe 6 is provided on the connecting pipe 5, and the extension pipe 6 is connected to the connecting pipe 5 through flanges and bolts. A mounting pipe 7 is fixedly installed on the extension pipe 6, and a sampling pipe 8 is provided on one side of the mounting pipe 7. The sampling pipe 8 can perform flue gas sampling. The mounting pipe 7 A spare side pipe 9 and a sampling pipe 10 are provided on one side. The side pipe 9 and the sampling pipe 10 can perform emergency monitoring when the sampling pipe 8 is blocked. Both the sampling pipe 8 and the sampling pipe 10 are provided with a one-way valve. Both the sampling pipe 10 and the sampling pipe 8 are provided with a covering component, which can cover and shield from one side. By providing the sampling pipe 10 and the covering component, during the smoke exhaust process, the sampling pipe 8 can sample the smoke. After the smoke enters the housing 1 of the monitoring device, the temperature sensor 4 can detect the temperature of the smoke. When smoke dust is blocked in the sampling pipe 8, the covering component on the sampling pipe 10 is opened, and the covering component on the sampling pipe 8 is closed at the same time, and the sampling pipe 10 is switched to the air inlet pipe. The sampled smoke enters the housing 1 of the monitoring device through the sampling pipe 10 and the side pipe 9 for detection, thereby ensuring the normal and uninterrupted monitoring of the smoke waste heat.

[0025] Furthermore, a filter screen 12 is fixedly installed inside the sampling tube 1 8, and the filter screen 12 can filter the collected flue gas to prevent smoke dust from entering and accumulating inside the monitoring device housing 1. A filter screen 12 is also fixedly installed inside the sampling tube 2 10. A flow meter 13 is fixedly installed inside the sampling tube 1 8, and the flow meter 13 is electrically connected to the external controller. The flow meter 13 is also fixedly installed inside the sampling tube 2 10. By providing the upper structure, the flue gas is sampled through the sampling tube 1 8 or the sampling tube 2 10 and enters the monitoring device housing 1 for temperature detection. The flue gas entering the sampling tube 1 8 or the sampling tube 2 10 can be filtered through the filter screen 12 for smoke dust. Simultaneously, the flow meter 13 can monitor the flow rate of the flue gas. When the monitored flue gas flow rate gradually decreases to a certain amount during normal flue gas emission, the filter screen 12 on the sampling tube 1 8 or the sampling tube 2 10 may be covered and blocked by smoke dust. At this time, the other air intake duct is switched to ensure normal flue gas monitoring.

[0026] Furthermore, the sampling tube 1 8 is connected to the mounting tube 7 through flanges and bolts, the side tube 9 is connected to the mounting tube 7 through flanges and bolts, a connecting elbow 11 is provided between the side tube 9 and the sampling tube 2 10, and both ends of the connecting elbow 11 are respectively connected to the side tube 9 and one end of the sampling tube 2 10 through flanges and bolts, and a covering component is provided on one end of the sampling tube 1 8 and the sampling tube 2 10; by providing the upper structure, when smoke and dust accumulation and blockage occur inside the sampling tube 1 8 or the sampling tube 2 10, the bolts at the connection of the sampling tube 1 8, the side tube 9, the sampling tube 2 10 and the connecting elbow 11 can be removed, and then the sampling tube 1 8, the side tube 9 and the sampling tube 2 10 can be disassembled and cleaned, thereby ensuring the normal monitoring of the subsequent flue gas waste heat.

[0027] Furthermore, the covering assembly includes an external sleeve 14, which is fixedly mounted on the corresponding sampling tube 1 8 and sampling tube 2 10. Six covering plates 15 are movably mounted on one side of the external sleeve 14. The covering plates 15 are arc-shaped plates with a central angle of 60°. The six covering plates 15 are brought together and fitted together to form a circular plate. A movable rack 16 is fixedly mounted on the covering plate 15. The movable rack 16 is slidably mounted on the external sleeve 14. A mounting hole for connecting the movable rack 16 is provided on the external sleeve 14. A driving gear 17 is rotatably mounted on one side of the movable rack 16. The driving gear 17 and the movable rack 16 are meshed with each other. One of the driving gears 17 is driven by a servo motor, and the servo motor is electrically connected to the external controller. A synchronous belt is arranged between the six driving gears 17, and the synchronous belt is movably connected to the six driving gears 17. A connecting shaft 18 is provided on one side, which is fixedly connected to the external sleeve 14, and is rotationally connected to the driving gear 17; by providing a covering component, when the sampling tube 8 is detected to be blocked, the servo motor on one side of the sampling tube 8 is controlled to start and drive one of the driving gears 17 to rotate, and through the cooperation of the synchronous belt and the movable rack 16, the six covering plates 15 are driven to move to the middle position and close together to cover the sampling tube 8 from one side, and synchronously, the valve on the sampling tube 2 10 is opened, and the servo motor on the sampling tube 2 10 is controlled to start and drive the driving gear 17 to rotate and cooperate with the movable rack 16 and the synchronous belt to drive the six covering plates 15 to open outwards. At this time, the flue gas can enter the monitoring equipment housing 1 through the sampling tube 2 10 and the side pipe 9 for temperature detection, thereby ensuring the normal and uninterrupted flue gas preheating monitoring.

[0028] Furthermore, the working principle of the utility model is as follows: when the sampling tube 8 is detected to be blocked, the servo motor on one side of the sampling tube 8 is controlled to start and drive one of the driving gears 17 to rotate and drive the six covering plates 15 to move to the middle position through the cooperation of the synchronous belt and the movable rack 16 to cover the sampling tube 8 from one side. Synchronously, the valve on the sampling tube 2 10 is opened, and the servo motor on the sampling tube 2 10 is controlled to start and drive the driving gear 17 to rotate and cooperate with the movable rack 16 and the synchronous belt to drive the six covering plates 15 to open outward. At this time, the flue gas can enter the monitoring equipment housing 1 through the sampling tube 2 10 and the side pipe 9 for temperature detection, thereby ensuring the normal and uninterrupted flue gas preheating monitoring.

[0029] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A device for monitoring exhaust heat in a thermal power plant, comprising a monitoring device housing (1), wherein a temperature sensor (4) is fixedly installed inside the monitoring device housing (1), and characterized in that: The monitoring device housing (1) is provided with a sampling assembly, the sampling assembly comprising a connecting tube (5), the connecting tube (5) being provided on the monitoring device housing (1), an extension tube (6) being provided on the connecting tube (5), a mounting tube (7) being fixedly mounted on the extension tube (6), a sampling tube 1 (8) being provided on one side of the mounting tube (7), a side pipe (9) for backup and a sampling tube 2 (10) being provided on one side of the mounting tube (7), and a covering assembly being provided on both the sampling tube 2 (10) and the sampling tube 1 (8); The covering assembly comprises an external sleeve (14), which is fixedly mounted on the corresponding sampling tube 1 (8) and sampling tube 2 (10), and six covering plates (15) are movably mounted on one side of the external sleeve (14), wherein the central angle of the covering plates (15) is 60°.

2. A thermal power plant exhaust waste heat monitoring device according to claim 1, characterized in that: A signal receiving module (2) is fixedly mounted on the monitoring device housing (1), and a detachable cover plate (3) is provided on the monitoring device housing (1), wherein the detachable cover plate (3) is threadedly connected to the monitoring device housing (1) via bolts.

3. The device for monitoring exhaust heat in a thermal power plant according to claim 1, characterized in that: The sampling tube 1 (8) has a filter screen (12) fixedly installed inside, and the sampling tube 2 (10) has a filter screen (12) fixedly installed inside. The sampling tube 1 (8) has a flow meter (13) fixedly installed inside, and the sampling tube 2 (10) has a flow meter (13) fixedly installed inside.

4. The device for monitoring exhaust heat in a thermal power plant according to claim 1, characterized in that: The connecting pipe (5) is connected to the monitoring device housing (1) via flanges and bolts, the extension pipe (6) is connected to the connecting pipe (5) via flanges and bolts, the sampling pipe 1 (8) is connected to the mounting pipe (7) via flanges and bolts, and the side pipe (9) is connected to the mounting pipe (7) via flanges and bolts.

5. The device for monitoring exhaust heat in a thermal power plant according to claim 1, characterized in that: A connecting elbow (11) is provided between the side pipe (9) and the second sampling pipe (10), and the two ends of the connecting elbow (11) are respectively connected to the side pipe (9) and one end of the second sampling pipe (10) through flanges and bolts, and a covering component is provided on one end of the first sampling pipe (8) and the second sampling pipe (10).

6. The device for monitoring exhaust heat in a thermal power plant according to claim 5, characterized in that: The covering assembly further comprises a movable rack (16), wherein the movable rack (16) is fixedly mounted on the covering plate (15), and the movable rack (16) is slidably mounted on the external sleeve (14), and a mounting hole for connecting the movable rack (16) is provided on the external sleeve (14), and a driving gear (17) is rotatably mounted on one side of the movable rack (16), and the driving gear (17) and the movable rack (16) are meshed with each other, and a synchronous belt is arranged between the six driving gears (17).

7. A thermal power plant exhaust waste heat monitoring device according to claim 6, characterized in that: The covering assembly further comprises a connecting shaft (18), which is arranged on one side of the driving gear (17), the connecting shaft (18) is fixedly connected to the outer sleeve (14), and the connecting shaft (18) is rotationally connected to the driving gear (17).

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