On-line monitoring device for combustion state of pulverized coal fired boiler

Abstract

The utility model relates to the technical field of on-line monitoring devices, and discloses a pulverized coal fired boiler combustion state on-line monitoring device which comprises a boiler shell, an ignition device is arranged on the surface of the boiler shell, and a flue gas exhaust pipe is arranged at a gas outlet. The industrial camera is arranged on the surface of the boiler shell; the fan is arranged on the upper surface of the boiler shell, an air outlet of the fan is connected with the cleaning ring through an air inducing pipe, the cleaning ring is installed on the inner wall of the boiler shell and located on the periphery of the lens, and air outlet pipes are evenly distributed on the inner wall. The flue gas analyzer is arranged at an air outlet of the flue gas exhaust pipe, and a high-temperature infrared temperature measuring unit and a pressure fluctuation sensor are further arranged in the boiler shell. The device has the advantages that airflow is conveyed to the cleaning ring through the draught fan via the air inducing pipe, a directional airflow field surrounding the lens is formed through the air outlet pipe on the inner wall of the cleaning ring, the surface of the lens is purged in real time, imaging blurring caused by dust accumulation is prevented, the cleaning ring and the lens are coaxially installed, it is ensured that the purge range is fully covered, and continuous work of an image collecting system is maintained.

Description

Technical Field

[0001] The utility model relates to the technical field of on-line monitoring devices, in particular to an on-line monitoring device for the combustion state of a pulverized coal boiler. Background Technique

[0002] The on-line monitoring device for boiler combustion is a key safety system to ensure the safe operation of the boiler during the combustion process. These on-line monitoring devices can quickly take measures when abnormal working conditions are detected to prevent accidents.

[0003] During the operation of a pulverized coal boiler, as the core component for monitoring the combustion state, the lens of the industrial camera is long-term exposed to a high-temperature flue gas environment, and it is extremely easy to cause blurred imaging due to the deposition of particulate matter in the flue gas. Traditional protection measures are difficult to achieve real-time dynamic cleaning, resulting in the interruption or distortion of monitoring data, directly affecting the real-time performance and accuracy of the optimal control of boiler combustion. Content of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides an on-line monitoring device for the combustion state of a pulverized coal boiler to solve the problems proposed in the above background technique that the lens is long-term exposed to a high-temperature flue gas environment, and it is extremely easy to cause blurred imaging due to the deposition of particulate matter in the flue gas. Traditional protection measures are difficult to achieve real-time dynamic cleaning, resulting in the interruption or distortion of monitoring data, directly affecting the real-time performance and accuracy of the optimal control of boiler combustion.

[0005] To achieve the above object, the utility model provides the following technical solution: An on-line monitoring device for the combustion state of a pulverized coal boiler, comprising:

[0006] A boiler shell, on the surface of which an ignition device is installed, and a flue gas exhaust pipe is installed at the air outlet of the boiler shell;

[0007] An industrial camera is arranged on the surface of the boiler shell, and a lens is installed through the surface of the boiler shell;

[0008] A blower is arranged on the upper surface of the boiler shell, an air guiding pipe is installed at the air outlet of the blower, a cleaning ring is installed at the air outlet end of the air guiding pipe, the cleaning ring is installed on the inner wall of the boiler shell, the cleaning ring is located on the outer periphery of the lens, and air outlet pipes are evenly arranged on the inner wall of the cleaning ring;

[0009] A flue gas analyzer is arranged at the air outlet of the flue gas exhaust pipe, a high-temperature infrared temperature measuring unit is installed inside the boiler shell, and a pressure fluctuation sensor is also installed inside the boiler shell.

[0010] Preferably, a fixing frame is installed on the upper surface of the boiler shell, the flue gas analyzer is installed on the inner wall of the fixing frame, and the flue gas analyzer obtains the concentrations of CO, NOx, O2 and unburned carbon through a high-temperature resistant sampling probe.

[0011] Preferably, a support plate is installed on the upper surface of the boiler shell, and a mounting plate is installed on the upper surface of the support plate.

[0012] Preferably, mounting hoops are installed on the surface of the mounting plate. The mounting hoops are semi-circular in design and are located on the front and rear sides of the fan. The mounting hoops are used to mount the fan.

[0013] Preferably, connecting blocks are installed on both the left and right sides of the mounting hoop, and threaded rods are rotatably connected between the connecting blocks. The threaded rods can drive the mounting hoop to clamp the fan.

[0014] Preferably, support rings are evenly distributed on the surface of the fan. The support rings are all located below the mounting hoop, and the support rings can prevent the fan from falling off.

[0015] Compared with the prior art, the present utility model provides an on-line monitoring device for the combustion state of a pulverized coal boiler, having the following beneficial effects:

[0016] For the on-line monitoring device for the combustion state of the pulverized coal boiler, the fan installed on the outer wall of the added boiler shell conveys air flow to the cleaning ring through the air duct. The air outlet pipes evenly arranged on the inner wall of the cleaning ring form a directional air flow field surrounding the lens. When the lens of the industrial camera is attached with dust due to being in a high-temperature flue gas environment for a long time, the continuously acting air flow can blow the surface of the lens in real time, preventing imaging blur caused by particulate deposition. The coaxial installation structure of the cleaning ring and the lens ensures that the blowing range is fully covered, thereby maintaining the continuous working ability of the image acquisition system and ensuring the integrity of the combustion state monitoring data. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the present utility model;

[0018] Figure 2 is a schematic cross-sectional structural diagram of the present utility model;

[0019] Figure 3 is a schematic installation structure diagram of the fan of the present utility model;

[0020] Figure 4 is a schematic structural diagram of the fan of the present utility model;

[0021] Figure 5 is a schematic structural diagram of the industrial camera of the present utility model.

[0022] In the figure: 1. Boiler shell; 2. Ignition device; 3. Flue gas exhaust pipe; 4. Industrial camera; 5. Lens; 6. Fan; 7. Induction air pipe; 8. Cleaning ring; 9. Air outlet pipe; 10. Flue gas analyzer; 11. High-temperature infrared temperature measurement unit; 12. Pressure fluctuation sensor; 13. Fixed bracket; 14. Support plate; 15. Mounting plate; 16. Mounting hoop; 17. Connecting block; 18. Threaded rod; 19. Support ring. Detailed implementation manners

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0024] The present invention provides a technical solution, an on-line monitoring device for the combustion state of a pulverized coal boiler. Please refer to Figure 1 , which includes a boiler shell 1, an ignition device 2 is installed on the surface of the boiler shell 1, and a flue gas exhaust pipe 3 is installed at the air outlet of the boiler shell 1;

[0025] An industrial camera 4 is arranged on the surface of the boiler shell 1. Please refer to Figure 5 , and a lens 5 is installed through the surface of the boiler shell 1 by the industrial camera 4;

[0026] Please refer to Figure 1 , a fan 6 is arranged on the upper surface of the boiler shell 1. Please refer to Figure 3 , an induction air pipe 7 is installed at the air outlet of the fan 6, and a cleaning ring 8 is installed at the air outlet end of the induction air pipe 7. The cleaning ring 8 is installed on the inner wall of the boiler shell 1. Please refer to Figure 5 , the cleaning ring 8 is located on the outer periphery of the lens 5, and air outlet pipes 9 are evenly arranged on the inner wall of the cleaning ring 8;

[0027] The air outlet pipe 9 is a high-pressure air jet head, which is a device that utilizes high-pressure gas high-speed air flow;

[0028] Please refer to Figure 1 , a flue gas analyzer 10 is arranged at the air outlet of the flue gas exhaust pipe 3. Please refer to Figure 2 , a high-temperature infrared temperature measurement unit 11 is installed inside the boiler shell 1, and a pressure fluctuation sensor 12 is also installed inside the boiler shell 1;

[0029] The high-temperature infrared temperature measurement unit 11 is used to collect the data of the flame temperature field distribution in the furnace in real time, and the pressure fluctuation sensor 12 is arranged near the burner nozzle to monitor the combustion dynamic pressure pulsation signal.

[0030] Please refer toFigure 1 On the upper surface of the boiler shell 1, a fixing frame 13 is installed, and the flue gas analyzer 10 is installed on the inner wall of the fixing frame 13. The flue gas analyzer 10 obtains the concentrations of CO, NOx, O2, and unburned carbon through a high-temperature resistant sampling probe.

[0031] Airflow is delivered to the cleaning ring 8 through the blower 6 arranged on the outer wall of the boiler shell 1 via the air duct 7. The air outlet pipes 9 evenly distributed on the inner wall of the cleaning ring 8 form a directional airflow field around the lens 5. When the lens 5 of the industrial camera 4 is attached with dust due to being in a high-temperature flue gas environment for a long time, the continuously acting airflow can blow the surface of the lens 5 in real time, preventing imaging blurring caused by particulate deposition. The coaxial installation structure of the cleaning ring 8 and the lens 5 ensures full coverage of the blowing range, thereby maintaining the continuous working ability of the image acquisition system and guaranteeing the integrity of the combustion state monitoring data.

[0032] A support plate 14 is installed on the upper surface of the boiler shell 1, and a mounting plate 15 is installed on the upper surface of the support plate 14.

[0033] Please refer to Figure 3 On the surface of the mounting plate 15, a mounting hoop 16 is installed. The mounting hoop 16 is designed as a semi-circular shape and is located on the front and back sides of the blower 6. The mounting hoop 16 is used to install the blower 6.

[0034] Please refer to Figure 4 On the left and right sides of the mounting hoop 16, connection blocks 17 are installed, and threaded rods 18 are rotatably connected between the connection blocks 17. The threaded rods 18 can drive the mounting hoop 16 to clamp the blower 6.

[0035] Support rings 19 are evenly distributed on the surface of the blower 6, and the support rings 19 are all located below the mounting hoop 16. The blower 6 can be prevented from falling off through the support rings 19.

[0036] When this solution is working: After ignition is started by the ignition device 2, the industrial camera 4 continuously collects the flame image in the furnace through the lens 5. At this time, the blower 6 delivers high-pressure airflow to the cleaning ring 8 through the air duct 7, and a directional air curtain around the lens 5 is formed through the air outlet pipes 9 to blow the surface of the lens 5 in real time to prevent dust accumulation. At the same time, the high-temperature infrared temperature measurement unit 11 collects the furnace temperature field data, the pressure fluctuation sensor 12 monitors the pressure pulsation signal at the burner nozzle, and the flue gas analyzer 10 analyzes the concentrations of CO, NOx, O2, and unburned carbon at the outlet of the flue gas exhaust pipe 3 through a high-temperature resistant probe. After all the monitoring data is processed by the control unit fixed by the support plate 14 and the mounting plate 15, under the guarantee of the system stability maintained by the blower 6 clamped by the mounting hoop 16 and the support rings 19, the combustion state evaluation result is finally output.

[0037] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0038] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An on-line monitoring device for the combustion state of a pulverized coal boiler, characterized in that, Comprising: A boiler shell (1), on the surface of which an ignition device (2) is installed, and a flue gas exhaust pipe (3) is installed at the air outlet of the boiler shell (1); An industrial camera (4) is arranged on the surface of the boiler shell (1), and a lens (5) is installed through the surface of the boiler shell (1) by the industrial camera (4); A fan (6) is arranged on the upper surface of the boiler shell (1), an air guiding pipe (7) is installed at the air outlet of the fan (6), a cleaning ring (8) is installed at the air outlet end of the air guiding pipe (7), the cleaning ring (8) is installed on the inner wall of the boiler shell (1), the cleaning ring (8) is located on the outer periphery of the lens (5), and air outlet pipes (9) are evenly arranged on the inner wall of the cleaning ring (8); A flue gas analyzer (10) is arranged at the air outlet of the flue gas exhaust pipe (3), a high-temperature infrared temperature measuring unit (11) is installed inside the boiler shell (1), and a pressure fluctuation sensor (12) is also installed inside the boiler shell (1).

2. The on-line monitoring device for the combustion state of a pulverized coal boiler according to claim 1, wherein: A fixing frame (13) is installed on the upper surface of the boiler shell (1), and the flue gas analyzer (10) is installed on the inner wall of the fixing frame (13).

3. An on-line monitoring device for the combustion state of a pulverized coal boiler according to claim 1, characterized in that: A support plate (14) is installed on the upper surface of the boiler shell (1), and a mounting plate (15) is installed on the upper surface of the support plate (14).

4. An on-line monitoring device for the combustion state of a pulverized coal boiler according to claim 3, characterized in that: A mounting hoop (16) is installed on the surface of the mounting plate (15), the mounting hoop (16) is designed as a semi-circular shape, and the mounting hoop (16) is located on the front and rear sides of the fan (6).

5. The on-line monitoring device for the combustion state of a pulverized coal boiler according to claim 4, characterized in that: Connecting blocks (17) are installed on both the left and right sides of the mounting hoop (16), and threaded rods (18) are rotatably connected between the connecting blocks (17).

6. The on-line monitoring device for the combustion state of a pulverized coal boiler according to claim 4, characterized in that: Support rings (19) are evenly arranged on the surface of the fan (6), and the support rings (19) are all located below the mounting hoop (16).

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