Thermal power plant environmental protection emission index monitoring and early warning device and method

Abstract

The invention provides a thermal power plant environmental protection emission index monitoring and early warning device and method.The device comprises a base and a monitoring box, the base is fixedly connected with a supporting column, the supporting column is provided with an adjusting assembly, the adjusting assembly is used for lifting the monitoring box, and the monitoring box is provided with a dust removal assembly and a linkage assembly; the dust removal assembly is used for cleaning a panel of the monitoring box, and the linkage assembly is used for driving the dust removal assembly to clean the monitoring box in the process that the adjusting assembly lifts the monitoring box. The height of the monitoring box can be adjusted through the adjusting assembly, the overhaul convenience and safety are remarkably improved, the linkage-driven dust removal assembly is arranged, panel cleaning is automatically completed in the lifting process, the maintenance process integration is achieved, cleaning operation is driven through lifting motion, an extra power source is not needed, and the characteristics of energy saving and environment friendliness are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of environmental protection monitoring, and particularly to a monitoring and early warning device and method for environmental protection emission indicators of thermal power plants. Background Art

[0002] A thermal power plant, abbreviated as a power plant, is a factory that uses combustibles as fuel to produce electric energy. Its basic production process is as follows: the fuel heats water to generate steam during combustion, converting the chemical energy of the fuel into heat energy. The steam pressure drives the steam turbine to rotate, converting heat energy into mechanical energy. Then the steam turbine drives the generator to rotate, converting mechanical energy into electric energy. The commonly used fuel in power plants is coal. For environmental protection, the gases generated after coal combustion need to be treated before being discharged. In order to ensure that the discharged gases meet the emission standards, a monitoring and early warning device is required to monitor the discharged gases in real time.

[0003] To ensure the stability of the monitoring and early warning device, it is necessary to regularly overhaul the monitoring and early warning device. Most of the existing monitoring and early warning devices for environmental protection emission indicators of thermal power plants are installed at high places, and there are the following technical defects during regular maintenance: (1) The fixed height of the monitoring box makes it inconvenient for maintenance personnel to operate and there are potential safety hazards; (2) Long-term exposure to dusty flue gas causes serious dust accumulation on the panel, and separate cleaning operations are required; (3) The cleaning and lifting operations are separated, consuming additional time and energy. These problems lead to low maintenance efficiency of the monitoring device, directly affecting the continuity and reliability of emission monitoring. Summary of the Invention

[0004] In view of the deficiencies in the prior art, the present invention provides a monitoring and early warning device and method for environmental protection emission indicators of thermal power plants. To achieve the above object, the present invention adopts the following technical solutions: A monitoring and early warning device for environmental protection emission indicators of thermal power plants, including a base and a monitoring box. A support column is fixedly connected to the base, and an adjustment component is installed on the support column. The adjustment component is used to lift and lower the monitoring box. A dust removal component and a linkage component are arranged on the monitoring box. The dust removal component is used to clean the panel of the monitoring box, and the linkage component is used to drive the dust removal component to clean the monitoring box during the process of the adjustment component lifting and lowering the monitoring box.

[0005] Preferably, the linkage component includes a reciprocating lead screw, a transmission gear and a fixed rack. Two bearing seats are fixedly connected to the top of the monitoring box, and the bearing seats are respectively located at positions close to the ends of the reciprocating lead screw. The reciprocating lead screw is rotatably installed on the bearing seats. The transmission gear is fixedly connected to one end of the reciprocating lead screw, and the fixed rack is vertically fixed on the support column and is matched with the transmission gear.

[0006] Preferably, it further includes a blowing component, which includes a rotating disk, a connecting rod, a fixed rod, a piston plate, a piston cylinder and a blowing pipe. The rotating disk is fixedly connected to one end of the reciprocating lead screw. The connecting rod is eccentrically hinged to the rotating disk. The fixed rod is hinged to the end of the connecting rod. The piston plate is fixed to the end of the fixed rod. The piston cylinder is fixedly connected to the side of the monitoring box and is provided with a check valve at the bottom of the piston cylinder. The blowing pipe is fixedly installed on the panel of the monitoring box and is connected to the piston cylinder. The blowing pipe is evenly provided with blowing holes for evenly blowing the panel of the monitoring box.

[0007] Preferably, the dust removal component includes a sliding sleeve, a limiting rod and a cleaning plate. The sliding sleeve is in threaded cooperation with the reciprocating lead screw. The limiting rod is fixedly installed on the top surface of the monitoring box body and is arranged parallel to the reciprocating lead screw. The cleaning plate is fixedly connected to the sliding sleeve and is slidably connected to the limiting rod. The cleaning plate is used for cleaning the panel of the monitoring box.

[0008] Preferably, a rubber pad for cleaning dust is fixedly connected to the surface of the cleaning plate that fits the panel of the monitoring box.

[0009] Preferably, the adjusting component includes a servo motor, a threaded column and a threaded sleeve. The servo motor is fixedly installed in the support column. The output end of the servo motor is fixedly connected to the threaded column. The threaded column is rotatably installed in the support column. The support column is provided with a radial travel groove. The threaded column passes through the travel groove. The threaded sleeve is slidably arranged in the travel groove and is in threaded connection with the threaded column. The threaded sleeve is fixedly connected to the monitoring box, and the monitoring box is driven to lift in the travel groove by the threaded column.

[0010] Preferably, it further includes a balancing component, which includes a fixed cover, a threaded rod, a counterweight, a driven sprocket and a driving sprocket. The fixed cover is fixed to the back of the support column. The threaded rod is rotatably installed in the fixed cover. The thread direction of the threaded rod is opposite to that of the threaded column. The counterweight is in threaded connection with the threaded rod. The driven sprocket is fixedly installed on the threaded rod. The driving sprocket is fixed on the threaded column. The driving sprocket and the driven sprocket are connected by a chain drive.

[0011] An environmental protection emission index monitoring and warning method for a thermal power plant, using the warning device as described above, includes the following steps: S1. Lift the monitoring box to the maintenance height through the adjusting component; S2. During the lifting process, drive the dust removal component to clean the panel of the monitoring box through the linkage component; S3. After the monitoring box reaches the specified height, perform parameter calibration or component replacement operations; S4. After the maintenance is completed, operate the adjusting component in reverse, and trigger the cleaning operation again during the process of lifting the monitoring box.

[0012] Preferably, the cleaning operation in step S2 includes: Driving a cleaning plate to perform mechanical scraping and dust removal through the rotation of a reciprocating lead screw; Synchronously driving a blowing assembly to generate pulsed air flow to purge the surface of the panel.

[0013] Preferably, during the lifting and lowering processes of steps S1 and S4, the position of a counterweight block is adjusted in real time through a balancing assembly, specifically including: A driving sprocket rotates with a lifting shaft, and drives a reverse threaded rod to rotate through chain transmission; The counterweight block moves along the reverse thread to generate a reverse moment, offsetting the overturning moment generated by the lifting and lowering of the monitoring box.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The height of the monitoring box is adjustable through an adjusting assembly, significantly improving the convenience and safety of maintenance; 2. An integrated dust removal assembly with linkage drive is provided, automatically completing the cleaning of the panel during the lifting and lowering processes, realizing an integrated maintenance process; 3. The cleaning operation is driven by the lifting movement, without the need for an additional power source, having the characteristics of energy conservation and environmental protection; 4. The dust removal method combining purging and mechanical cleaning ensures that the cleanliness of the monitoring panel meets the requirements of optical detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic three-dimensional structure diagram of an embodiment of the present invention; Figure 2 is a schematic exploded structure diagram of an embodiment of the present invention; Figure 3 is a schematic three-dimensional structure diagram of a monitoring box in an embodiment of the present invention; Figure 4 is Figure 2 an enlarged structure diagram of part A in Figure 5 is Figure 2 an enlarged structure diagram of part B in Figure 6 is a schematic exploded structure diagram of a blowing assembly in an embodiment of the present invention; Figure 7 is a schematic three-dimensional structure diagram of a stabilizing assembly in an embodiment of the present invention.

[0016] In the figure: Base 1, support column 2, stroke groove 21, adjustment component 3, servo motor 31, threaded column 32, threaded sleeve 33, monitoring box 4, linkage component 5, reciprocating lead screw 51, transmission gear 52, fixed rack 53, bearing seat 54, air blowing component 6, rotating disc 61, connecting rod 62, fixed rod 63, piston plate 64, piston cylinder 65, air blowing pipe 66, dust removal component 7, sliding sleeve 71, limiting rod 72, cleaning plate 73, rubber pad 74, balance component 8, fixed cover 81, threaded rod 82, counterweight 83, driven sprocket 84, driving sprocket 85. Detailed implementation mode

[0017] 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 work shall fall within the protection scope of the present invention.

[0018] Please refer to Figures 1 to 7 , the present invention provides a technical solution: An environmental protection emission index monitoring and warning device for a thermal power plant, including a base 1 and a monitoring box 4. A support column 2 is fixedly connected to the base 1, and an adjustment component 3 is installed on the support column 2. The adjustment component 3 is used to lift and lower the monitoring box 4. A dust removal component 7 and a linkage component 5 are arranged on the monitoring box 4. The dust removal component 7 is used to clean the panel of the monitoring box 4, and the linkage component 5 is used to drive the dust removal component 7 to clean the monitoring box 4 during the process of the adjustment component 3 lifting and lowering the monitoring box 4.

[0019] Refer to Figures 1 to 5 , in order to achieve automatic cleaning of the monitoring box 4 during the process of the monitoring box 4 descending from a high place, so that the linkage component 5 cooperates with the dust removal component 7, wherein: The linkage component 5 includes a reciprocating lead screw 51, a transmission gear 52 and a fixed rack 53. Two bearing seats 54 are fixedly connected to the top of the monitoring box 4, and the bearing seats 54 are respectively located at positions close to the ends of the reciprocating lead screw 51. The reciprocating lead screw 51 is rotatably installed on the bearing seats 54. The transmission gear 52 is fixedly connected to one end of the reciprocating lead screw 51. The fixed rack 53 is vertically fixed on the support column 2 and cooperates with the transmission gear 52. By meshing of the gear and the rack, the linear lifting is converted into a rotational motion, accurately controlling the rotation frequency of the reciprocating lead screw 51, ensuring the synchronization of the dust removal action and the lifting speed, and improving the reliability of the system operation; The dust removal component 7 includes a sliding sleeve 71, a limiting rod 72 and a cleaning plate 73. The sliding sleeve 71 is in threaded cooperation with the reciprocating lead screw 51. The limiting rod 72 is fixedly installed on the top surface of the monitoring box 4 and is arranged parallel to the reciprocating lead screw 51. The cleaning plate 73 is fixedly connected to the sliding sleeve 71 and is slidably connected to the limiting rod 72. The cleaning plate 73 is used to clean the panel of the monitoring box 4, constructing an actuator for mechanical cleaning. The rotational motion is converted into a linear reciprocating motion through a threaded pair, and the limiting rod 72 is used to eliminate the motion deviation, ensuring that the cleaning plate 73 maintains a constant contact pressure with the monitoring panel and improving the dust removal uniformity.

[0020] Refer to Figure 4 , in order to optimize the cleaning contact interface, a rubber pad 74 for cleaning dust is fixedly connected to the surface of the cleaning plate 73 that fits the panel of the monitoring box 4. The rubber pad 74 is designed with both elastic deformation and wear resistance characteristics, avoiding scratches on the panel caused by direct metal contact while ensuring the scraping force, and prolonging the service life of the optical sensor protective cover.

[0021] Refer to Figure 5 , 6 , in order to further improve the cleaning effect of the monitoring box 4, a blowing component 6 is introduced. The blowing component 6 includes a rotating disk 61, a connecting rod 62, a fixed rod 63, a piston plate 64, a piston cylinder 65 and a blowing pipe 66. The rotating disk 61 is fixedly connected to one end of the reciprocating lead screw 51. The connecting rod 62 is eccentrically hinged to the rotating disk 61. The fixed rod 63 is hinged to the end of the connecting rod 62. The piston plate 64 is fixed to the end of the fixed rod 63. The piston cylinder 65 is fixedly connected to the side of the monitoring box 4 and a one-way valve is arranged at the bottom of the piston cylinder 65. The blowing pipe 66 is fixedly installed on the panel of the monitoring box 4 and is connected to the piston cylinder 65. The blowing pipe 66 is evenly provided with blowing holes for evenly blowing the panel of the monitoring box 4. The piston is driven by the lifting power to generate pulsed air flow, forming a composite cleaning mechanism with mechanical cleaning, effectively removing caked dust, especially suitable for treating stubborn stains in a high-humidity flue gas environment.

[0022] Refer to Figure 2, in order to lower the monitoring box 4 from a height of 4 people to a lower place for maintenance, the adjustment component 3 is used to automatically lift and lower the monitoring box 4, reducing labor intensity and being convenient to use. The adjustment component 3 is introduced. The adjustment component 3 includes a servo motor 31, a threaded column 32 and a threaded sleeve 33. The servo motor 31 is fixedly installed in the support column 2, and the output end of the servo motor 31 is fixedly connected to the threaded column 32. The threaded column 32 is rotatably installed in the support column 2. The support column 2 is provided with a radial travel groove 21. The threaded column 32 passes through the travel groove 21. The threaded sleeve 33 is slidably arranged in the travel groove 21 and is threadedly connected to the threaded column 32. The threaded sleeve 33 is fixedly connected to the monitoring box 4, and the monitoring box 4 is driven to lift and lower in the travel groove 21 by the threaded column 32. The precise transmission combination of the servo motor 31 + ball screw is adopted, and the circumferential rotation is restricted by the travel groove 21 to achieve high positioning accuracy and meet the personalized height requirements of maintenance personnel of different body types.

[0023] Refer to Figure 7 , in order to make the monitoring box 4 lift and lower stably and keep the center of gravity of the whole device located in the middle section, the balance component 8 is introduced. The balance component 8 includes a fixed cover 81, a threaded rod 82, a counterweight 83, a driven sprocket 84 and a driving sprocket 85. The fixed cover 81 is fixed on the back of the support column 2. The threaded rod 82 is rotatably installed in the fixed cover 81. The threaded direction of the threaded rod 82 is opposite to that of the threaded column 32. The counterweight 83 is threadedly connected to the threaded rod 82. The driven sprocket 84 is fixedly installed on the threaded rod 82. The driving sprocket 85 is fixed on the threaded column 32. The driving sprocket 85 and the driven sprocket 84 are connected by chain drive. The reverse torque is generated by the counterweight 83 with reverse threads to offset the center of gravity shift caused by the lifting and lowering of the monitoring box 4 in real time and prevent the support column 2 from deforming.

[0024] When maintenance is required, during the process of the adjustment component 3 driving the monitoring box 4 to descend, the fixed rack 53 on the support column 2 meshes with the transmission gear 52 to drive the reciprocating lead screw 51 to rotate, so that the sliding sleeve 71 moves along the reciprocating lead screw 51 and drives the cleaning plate 73 to mechanically clean the monitoring panel; at the same time, the rotating disc 61 drives the piston plate 64 to reciprocate in the piston cylinder 65 through the linkage mechanism, and blows the compressed air evenly over the surface of the panel through the air blowing pipe 66 to achieve a double dust removal effect.

[0025] A method for monitoring and warning environmental protection emission indicators of a thermal power plant is also provided, including the following steps: S1. Lift and lower the monitoring box 4 to the maintenance height through the adjustment component 3; S2. During the lifting and lowering process, drive the dust removal component 7 to clean the panel of the monitoring box 4 through the linkage component 5; S3. When the monitoring box 4 reaches the specified height, perform parameter calibration or component replacement operations; S4. After the maintenance is completed, operate the adjustment component 3 in the reverse direction, and trigger the cleaning operation again during the process of lifting the monitoring box 4.

[0026] Among them, the cleaning operation in step S2 includes: Driving the cleaning plate 73 to perform mechanical scraping and dust removal through the rotation of the reciprocating lead screw 51; Synchronously driving the blowing component 6 to generate pulsed air flow to blow the surface of the panel.

[0027] Among them, during the lifting and lowering processes in steps S1 and S4, the position of the counterweight 83 is adjusted in real time through the balance component 8, specifically including: The driving sprocket 85 rotates with the lifting shaft, and drives the reverse threaded rod 82 to rotate through chain drive; The counterweight 83 moves along the reverse thread to generate a reverse torque to offset the overturning torque generated by the lifting and lowering of the monitoring box 4.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A thermal power plant environmental emission index monitoring and early warning device, comprising a base and a monitoring box, characterized in that: A support column is fixedly connected to the base, and an adjustment component is installed on the support column. The adjustment component is used to lift the monitoring box. The monitoring box is provided with a dust removal component and a linkage component. The dust removal component is used to clean the panel of the monitoring box. The linkage component is used to drive the dust removal component to clean the monitoring box during the process of the adjusting component lifting the monitoring box.

2. A thermal power plant environmental emission index monitoring and early warning device according to claim 1, characterized in that: The linkage assembly includes a reciprocating screw, a transmission gear and a fixed rack. Two bearing seats are fixedly connected to the top of the monitoring box. The bearing seats are respectively located near the ends of the reciprocating screw. The reciprocating screw is rotatably mounted on the bearing seats. The transmission gear is fixedly connected to one end of the reciprocating screw. The fixed rack is vertically fixed on the support column and cooperates with the transmission gear.

3. A thermal power plant environmental emission index monitoring and early warning device according to claim 2, characterized in that: It also includes a blowing assembly, which includes a rotating disk, a connecting rod, a fixed rod, a piston plate, a piston cylinder and a blowing pipe. The rotating disk is fixedly connected to one end of the reciprocating screw, the connecting rod is eccentrically hinged on the rotating disk, the fixed rod is hinged to the end of the connecting rod, the piston plate is fixed to the end of the fixed rod, the piston cylinder is fixedly connected to the side of the monitoring box and a one-way valve is provided at the bottom of the piston cylinder, the blowing pipe is fixedly installed on the panel of the monitoring box and connected to the piston cylinder, and the blowing pipe is evenly provided with blowing holes for evenly blowing air to the panel of the monitoring box.

4. A thermal power plant environmental emission index monitoring and early warning device according to claim 2, characterized in that: The dust removal assembly includes a sliding sleeve, a limiting rod and a cleaning plate. The sliding sleeve is threadedly matched with the reciprocating screw. The limiting rod is fixedly mounted on the top surface of the monitoring box and is arranged parallel to the reciprocating screw. The cleaning plate is fixedly connected to the sliding sleeve and slidably connected to the limiting rod. The cleaning plate is used to clean the panel of the monitoring box.

5. A thermal power plant environmental emission index monitoring and early warning device according to claim 4, characterized in that: A rubber pad for cleaning dust is fixedly connected to one side of the cleaning plate that is in contact with the panel of the monitoring box.

6. The device for monitoring and early warning of environmental emission indicators of a thermal power plant according to claim 1, characterized in that: The adjustment component includes a servo motor, a threaded column and a threaded sleeve. The servo motor is fixedly installed in the support column. The output end of the servo motor is fixedly connected to the threaded column. The threaded column is rotatably installed in the support column. The support column is provided with a radial stroke groove. The threaded column passes through the stroke groove. The threaded sleeve is slidably arranged in the stroke groove and is threadedly connected with the threaded column. The threaded sleeve is fixedly connected to the monitoring box and drives the monitoring box to rise and fall in the stroke groove through the threaded column.

7. A thermal power plant environmental emission index monitoring and early warning device according to claim 6, characterized in that: It also includes a balancing assembly, which includes a fixed cover, a threaded rod, a counterweight, a driven sprocket and a driving sprocket. The fixed cover is fixed to the back of the support column, the threaded rod is rotatably installed in the fixed cover, the threaded direction of the threaded rod is opposite to that of the threaded column, the counterweight is threadedly connected to the threaded rod, the driven sprocket is fixedly installed on the threaded rod, the driving sprocket is fixed on the threaded column, and the driving sprocket and the driven sprocket are connected by a chain transmission.

8. A method for monitoring and early warning of environmental emission indicators of thermal power plants, characterized in that: Using the early warning device as claimed in any one of claims 1 to 7, comprising the following steps: S1. Lift the monitoring box to the inspection height by adjusting the components; S2. During the lifting process, the dust removal component is driven by the linkage component to clean the monitoring box panel; S3. When the monitoring box reaches the specified height, perform parameter calibration or component replacement operations; S4. After the inspection is completed, reverse the adjustment component to trigger the cleaning operation again during the process of lifting the monitoring box.

9. A thermal power plant environmental emission index monitoring and early warning device according to claim 8, characterized in that: The cleaning operation in step S2 includes: The mechanical scraping and dust removal is carried out by driving the cleaning plate through the rotation of the reciprocating screw; The blowing assembly is synchronously driven to generate pulse airflow to blow the panel surface.

10. The device for monitoring and early warning of environmental emission indicators of a thermal power plant according to claim 8, characterized in that: During the lifting process of steps S1 and S4, the position of the counterweight is adjusted in real time by the balancing assembly, specifically including: The active tooth sprocket rotates with the lifting shaft, and drives the reverse threaded rod to rotate through the chain transmission; The counterweight moves along the reverse thread to generate a reverse torque, which offsets the overturning torque caused by the lifting of the monitoring box.

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