Coal-fired power plant boiler fly ash carbon content on-line detection device and detection method

Abstract

The invention relates to the technical field of fly ash carbon content detection, and discloses a coal-fired power plant boiler fly ash carbon content on-line detection device which comprises a collecting pipe installed in the middle of a horizontal smoke exhaust pipe, and a first electric control magnetic valve used for controlling opening and closing of the collecting pipe is arranged in the smoke exhaust pipe. Two first connecting rings located on the two sides of the first electric control magnetic valve are arranged on the side face of the collecting pipe, and a first communicating pipe communicating with the interior of the collecting pipe is arranged between the lower side faces of the two first connecting rings. According to the device, through cooperation of a first electric control magnetic valve and two second electric control magnetic valves, smoke within a certain distance or time in a smoke exhaust pipe is completely guided into a first communicating pipe, fly ash contained in the smoke is collected, a third communicating pipe is matched to drive a scraping plate to rotate, and the fly ash bonded to one face of a filter plate is scraped; fly ash contained in smoke within a certain distance or time in the smoke exhaust pipe is completely collected, and then the accuracy of detecting the carbon content of the fly ash in the smoke exhaust pipe is improved.

Description

Technical Field

[0001] The invention relates to the technical field of fly ash carbon content detection, and in particular to an online detection device and a detection method for fly ash carbon content in a coal-fired power plant boiler. Background Art

[0002] The carbon content of fly ash is one of the important parameters for the combustion of boiler equipment during the power generation process of a power plant. In the process of detecting the carbon content of fly ash, the air-coal ratio of the equipment can be adjusted according to the parameters, thereby effectively improving the combustion control capability of the power plant.

[0003] In order to facilitate the detection of the carbon content of fly ash in a coal-fired power plant boiler, the prior art provides a device for detecting the carbon content of fly ash in a coal-fired power plant boiler, such as a patent with a publication number of CN214374764U, which discloses a device for detecting the carbon content of fly ash in a coal-fired power plant boiler, including a boiler, an ash discharge pipe is fixedly connected to one side of the boiler body, an air inlet and an air outlet are opened at the bottom of the ash discharge pipe, an air inlet pipe and an air outlet are detachably connected to the bottom of the ash discharge pipe, the air inlet pipe is connected to the air inlet, and the air outlet pipe is connected to the bottom of the ash discharge pipe. The air inlet pipe is connected to the air outlet, and one end of the air outlet pipe away from the ash discharge pipe is fixedly connected to the ash hopper; the carbon content of boiler fly ash can be monitored in real time, and the air inlet pipe, the air outlet pipe and the ash discharge pipe are detachably connected, so that after the fly ash is collected, the connection between the air inlet pipe, the air outlet pipe and the ash discharge pipe can be disconnected, so as to facilitate the cleaning of the air inlet pipe and the ash hopper and avoid inaccurate carbon content detection. The intercepting plate can allow more fly ash to enter the air inlet pipe, and the baffle can prevent the exhaust gas in the ash discharge pipe from entering the air outlet.

[0004] The above patent has obvious beneficial effects, but still has the following shortcomings in actual operation:

[0005] In the above-mentioned comparative document, an air inlet pipe is set on the side of the ash discharge pipe of the boiler in the coal-fired power plant, and the fly ash in the ash discharge pipe is intercepted into the air inlet pipe in conjunction with the interception plate, and the fly ash contained in the gas is intercepted by the filter net, and the fly ash falls into the ash collecting bottle and is detected. However, in reality, the fly ash moves irregularly in the ash discharge pipe, and the above-mentioned comparative document only intercepts a part of the air and fly ash in the ash discharge pipe, thereby reducing the accuracy of the fly ash carbon content detection. At the same time, after the fly ash is intercepted by the filter net, most of the fly ash will fall due to its own weight, and a part of the fly ash will still be stuck to the filter net and cannot fall. Therefore, this field urgently needs to improve the online detection device and detection method for the carbon content of fly ash in coal-fired power plant boilers, so as to solve the defects of the existing technology. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention provides an online detection device and method for the carbon content in fly ash of a coal-fired power plant boiler, which improves the accuracy of detecting the carbon content in fly ash in an exhaust pipe.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] In the first aspect, the present invention discloses an online detection device for the carbon content of fly ash in a coal-fired power plant boiler, comprising a collecting pipe installed in the middle position of a horizontal smoke exhaust pipe, a first electrically controlled solenoid valve for controlling the opening and closing of the collecting pipe is provided in the smoke exhaust pipe, two first connecting rings are provided on the side of the collecting pipe and are located on both sides of the first electrically controlled solenoid valve, a first connecting pipe connected to the collecting pipe is provided between the lower sides of the two first connecting rings, a second connecting pipe connected to the collecting pipe is provided on the side of the first connecting pipe away from the collecting pipe, two first through-holes and a second through-hole matched with the two ends of the first connecting pipe are provided on the lower side of the collecting pipe, and a second connecting pipe is provided at one end of the second connecting pipe away from the first connecting pipe for For the detection unit for collecting and detecting fly ash, second electrically controlled solenoid valves for controlling the opening and closing of the first connecting pipe are provided on the side surfaces at both ends of the first connecting pipe, a filter plate adapted to the upper end position of the second connecting pipe is provided in the first connecting pipe, a scraper plate with a rotating effect and one side abutting against one side of the filter plate is provided on the side of the filter plate facing the first through-hole, a third connecting pipe is provided between the side surface of one end of the first connecting pipe close to the first through-hole and the middle side surface, and one end of the third connecting pipe is adapted to the scraper plate, a driving unit for driving the first connecting ring to rotate along the collecting pipe is provided on the side surface of the collecting pipe, and a vibration unit for vibrating the first connecting pipe is also provided on the side surface of the collecting pipe.

[0009] Preferably, the detection unit includes a detection box fixedly installed on the end of the second connecting pipe away from the first connecting pipe, a partition is fixedly installed in the cavity inside the detection box, a first telescopic device with one end passing through the partition, a third telescopic device with one end passing through the partition and a main controller are fixedly installed on the side wall of the detection box away from the second connecting pipe, a second telescopic device matched with the position of the first telescopic device and the third telescopic device is fixedly installed on the inner side wall of the detection box, a telescopic end of the second telescopic device is fixedly connected with a sleeve ring, a burning bottle matched with the second connecting pipe is provided in the sleeve ring, a weighing device for weighing is provided at the telescopic end of the third telescopic device, and a burning device for burning fly ash is provided on one side of the detection box.

[0010] Preferably, a first heat insulation plate is fixedly installed on a side of the weighing device away from the third telescopic device, a second heat insulation plate is fixedly installed on a side of the detection box away from the third telescopic device, the second heat insulation plate and the side wall of the detection box close to the second connecting tube are both provided with limiting grooves adapted to the burning bottle, and a vibration excitation device for vibrating the burning bottle is fixedly installed on the telescopic end of the first telescopic device.

[0011] Preferably, the driving unit includes two second connecting rings fixedly installed on the side of the collecting tube, a driving motor is fixedly installed on the side of the second connecting ring, a gear is fixedly installed on the output end of the driving motor, a tooth groove engaged with the gear is opened on the side of the first connecting ring, two third through-holes and a fourth through-hole adapted to the first through-hole and the second through-hole are opened on the side of the collecting tube, and a first guide plate adapted to the third through-hole and a second guide plate adapted to the fourth through-hole are fixedly connected to the inner side wall of the collecting tube.

[0012] Preferably, the vibration unit comprises a plurality of elastic rods fixedly mounted on the side of the second connecting ring, the elastic rods are elastic and one end of which is adapted to the position of the first connecting pipe, and one end of the elastic rod away from the second connecting ring is fixedly connected to a vibration ball.

[0013] According to the claim, an online detection device for the carbon content in fly ash of a coal-fired power plant boiler is characterized in that a fourth connecting pipe and a fifth connecting pipe with a disassembly effect and adapted to the first connecting pipe are provided in the middle position of the first connecting pipe, the second connecting pipe is provided on the side of the fourth connecting pipe, the filter plate is installed in the fifth connecting pipe, a first mounting rod is fixedly installed in the fourth connecting pipe, one end of the first mounting rod is rotatably connected to a rotating seat, a plurality of scraping plates are fixedly connected to the side of the rotating seat, and a pushing unit for pushing the filter plate to press against the scraping plate is provided in the fifth connecting pipe.

[0014] Preferably, the pushing unit includes a bucket-shaped wind guide cover arranged in the fifth connecting tube, a second mounting rod with a triangular cross-section is fixedly installed between the side surface of the wind guide cover and the inner wall of the fifth connecting tube, a movable rod with one end connected to the filter plate passes through the wind guide cover, a baffle is fixedly connected to the end of the movable rod away from the filter plate, and a spring mounted on the side of the movable rod is fixedly connected between one side of the baffle and the inner wall of the wind guide cover.

[0015] Preferably, a polygonal rectangular limiting block is fixedly connected to one end of the movable rod close to the filter plate, and a rectangular limiting opening adapted to the rectangular limiting block is formed on one side of the filter plate.

[0016] Preferably, a sealing ring and a plurality of balls matched with the first through-hole or the second through-hole are embedded in the inner side wall of the first connecting ring, and a taking-in and putting-out opening matched with the ignition bottle is opened on one side of the detection box.

[0017] In a second aspect, the present invention discloses an online detection method for the carbon content of fly ash in a coal-fired power plant boiler, comprising the above-mentioned online detection device for the carbon content of fly ash in a coal-fired power plant boiler. The method comprises the following steps:

[0018] S1: Preparation stage: Start the driving unit to drive the first connecting tube to the lower side of the collecting tube and match the first through-hole and the second through-hole, start the second telescopic device to drive the burning bottle to the upper side of the weighing device, and record the initial weight of the burning bottle through the main controller, drive the burning bottle to the position of the first telescopic device again through the second telescopic device, and start the first telescopic device to push the burning bottle to the second connecting tube;

[0019] S2: Collect fly ash: Close the first electrically controlled solenoid valve, open the two second electrically controlled solenoid valves, and the smoke in the smoke exhaust pipe enters the first connecting pipe through the first through-hole, and the fly ash is intercepted by the filter plate and falls into the burning bottle. At the same time, part of the smoke blows the scraping plate to rotate through the third connecting pipe, and the fly ash on the filter plate is scraped into the burning bottle. After the fly ash is collected, open the first electrically controlled solenoid valve and close the second electrically controlled solenoid valve;

[0020] S3: Detecting the carbon content: The telescopic end of the first telescopic device moves downward, and the telescopic end of the second telescopic device drives the burning bottle to move to the weighing device, and the third telescopic device is started to drive the upper end of the burning bottle to completely fit with the second heat insulation board, and the burning device is turned on to burn the fly ash in the burning bottle. After the burning is completed, the burning bottle is weighed by the weighing device, and the carbon content of the fly ash is calculated by the main controller;

[0021] S4: Cleaning stage: After the carbon content of the fly ash in the smoke exhaust pipe is detected, the burning bottle is moved to a position that matches the second connecting pipe through the cooperation of the second telescopic device and the first telescopic device. The first connecting ring is driven by the driving motor to rotate along the collecting pipe. At the same time, the vibrating ball knocks and vibrates the first connecting pipe to rotate the first connecting pipe to the upper side of the collecting pipe. The second electrically controlled solenoid valve is opened, and the first guide plate and the second guide plate are cooperated to allow the burnt fly ash to slide into the collecting pipe and be discharged.

[0022] In view of the deficiencies of the prior art, the present invention provides an online detection device and method for the carbon content of fly ash in a coal-fired power plant boiler, which overcomes the deficiencies of the prior art. The beneficial effects of the present invention are:

[0023] 1. In the present invention, the smoke of a certain distance or time in the smoke exhaust pipe is completely introduced into the first connecting pipe through the cooperation of the first electrically controlled solenoid valve and the two second electrically controlled solenoid valves, and the fly ash contained in the smoke is collected. The third connecting pipe is used to drive the scraping plate to rotate, and the fly ash adhered to one side of the filter plate is scraped off, so that the fly ash contained in the smoke of a certain distance or time in the smoke exhaust pipe is collected more completely, thereby improving the accuracy of the detection of the carbon content of the fly ash in the smoke exhaust pipe.

[0024] 2. In the present invention, by means of the first telescopic device, the burning bottle, the limit groove, the second telescopic device, the sleeve ring, the third telescopic device, the weighing device, the burning device and the main controller arranged on the detection box, after the fly ash is collected for a certain distance or time in the smoke exhaust pipe, the carbon content thereof can be detected, and the final data can be transmitted to the interactive platform through the main controller, thereby realizing the online detection of the carbon content of the fly ash in the smoke exhaust pipe, and facilitating the detection of the carbon content of the fly ash in the smoke exhaust pipe.

[0025] 3. In the present invention, the first connecting pipe can be driven to the top of the collecting pipe by a driving motor, and the vibration device is used to vibrate the incineration bottle to pour out the fly ash in the incineration bottle after detection, and the first guide plate and the second guide plate are used to use flue gas to bring out the fly ash after incineration, and the incineration bottle is cleaned, so as to facilitate multiple carbon content detection of the fly ash in the exhaust pipe.

[0026] 4. In the present invention, by arranging a plurality of elastic rods and vibrating balls, when the first connecting tube rotates along the side of the collecting tube, the vibrating balls hit the side of the first connecting tube, thereby vibrating the first connecting tube, preventing the burnt fly ash from adhering to the inner wall of the first connecting tube, thereby improving the cleaning effect inside the first connecting tube.

[0027] 5. In the present invention, the spring always exerts a pulling force on the baffle toward the filter plate, so that the filter plate always abuts against the side surfaces of several scraper plates, thereby preventing a gap from being generated between the scraper plate and the filter plate after long-term use, and cooperating with the movable rod to increase the service life of scraping fly ash on the filter plate.

[0028] 6. In the present invention, by providing the fourth connecting tube, the fifth connecting tube and the access port, the fifth connecting tube and the fourth connecting tube can be disassembled, and the rectangular limit block and the rectangular limit port are used to facilitate the installation or later replacement of the filter plate. The access port is convenient for taking and placing the calcination bottle, thereby improving the practicality of the overall device.

[0029] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0031] Figure 1 This is a schematic diagram of the structure of the present invention after overall installation;

[0032] Figure 2It is a schematic structural diagram of the overall cross-section of the present invention;

[0033] Figure 3 It is a schematic diagram of the structure of the collecting pipe and the first connecting pipe in the present invention;

[0034] Figure 4 It is a schematic structural diagram of a cross-section of the first connecting pipe in the present invention;

[0035] Figure 5 It is a schematic structural diagram of a cross-section of the first connecting ring in the present invention;

[0036] Figure 6 It is a schematic structural diagram of a partial cross-section of the fourth connecting pipe and the fifth connecting pipe in the present invention;

[0037] Figure 7 It is a schematic structural diagram of a cross-section of the detection box in the present invention;

[0038] Figure 8 It is a structural schematic diagram of the air guide cover in the present invention;

[0039] Fig. 9 A schematic diagram of the structure of the first guide plate and the second guide plate in the present invention;

[0040] Fig.10 for Figure 2 The enlarged structural diagram at A in the middle;

[0041] Fig.11 for Figure 3 The enlarged structural diagram at B in the middle;

[0042] Fig.12 for Figure 6 Enlarged structural diagram at point C in the middle.

[0043] In the figure: 1, smoke exhaust pipe; 2, collecting pipe; 3, first electric control solenoid valve; 4, first connecting pipe; 5, second connecting pipe; 6, first through-hole; 7, second through-hole; 8, detection unit; 9, second electric control solenoid valve; 10, first connecting ring; 11, third connecting pipe; 12, filter plate; 13, scraper plate; 14, drive unit; 15, vibration unit; 16, detection box; 17, partition; 18, first telescopic device; 19, burning bottle; 20, limit groove; 21, second telescopic device; 22, sleeve ring; 23, third telescopic device; 24, weighing device; 25, first heat insulation board; 26, burning device; 2 7. Second heat insulation board; 28. Main controller; 29. ​​Excitation device; 30. Second connecting ring; 31. Drive motor; 32. Gear; 33. Tooth groove; 34. Third through-hole; 35. Fourth through-hole; 36. First guide plate; 37. Second guide plate; 38. Elastic rod; 39. Vibrating ball; 40. Fourth connecting pipe; 41. Fifth connecting pipe; 42. First mounting rod; 43. Wind guide cover; 44. Second mounting rod; 45. Movable rod; 46. Baffle; 47. Spring; 48. Rectangular limit block; 49. Rotating seat; 50. Rectangular limit opening; 51. Sealing ring; 52. Ball; 53. Take-in and put-out opening. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] Embodiment 1

[0046] See also Figure 1-Figure 12, an online detection device for the carbon content of fly ash in a coal-fired power plant boiler, comprising a collecting pipe 2 installed in the middle of a horizontal exhaust pipe 1, a first electrically controlled solenoid valve 3 for controlling the opening and closing of the collecting pipe 2 is arranged in the exhaust pipe 1, two first connecting rings 10 are arranged on the side of the collecting pipe 2 and are located on both sides of the first electrically controlled solenoid valve 3, a first connecting pipe 4 communicating with the collecting pipe 2 is arranged between the lower sides of the two first connecting rings 10, a second connecting pipe 5 communicating with the first connecting pipe 4 is arranged on the side away from the collecting pipe 2, two first through-holes 6 and second through-holes 7 adapted to the two ends of the first connecting pipe 4 are arranged on the lower side of the collecting pipe 2, and one end of the second connecting pipe 5 away from the first connecting pipe 4 is provided with a first connecting pipe 4, and a second connecting pipe 5 communicating with the first connecting pipe 4 is provided with a first connecting pipe 4. A detection unit 8 for collecting and detecting fly ash is provided, second electrically controlled solenoid valves 9 for controlling the opening and closing of the first connecting pipe 4 are provided on both end sides of the first connecting pipe 4, a filter plate 12 adapted to the upper end position of the second connecting pipe 5 is provided in the first connecting pipe 4, a scraper plate 13 with a rotating effect and one side abutting against one side of the filter plate 12 is provided on the side of the filter plate 12 facing the first through-hole 6, a third connecting pipe 11 is provided between the side of one end of the first connecting pipe 4 close to the first through-hole 6 and the side of the middle thereof, and one end of the third connecting pipe 11 is adapted to the scraper plate 13, a driving unit 14 for driving the first connecting ring 10 to rotate along the collecting pipe 2 is provided on the side of the collecting pipe 2, and the collecting pipe 2 side is also provided with a vibration unit 15 for vibrating the first connecting pipe 4, the detection unit 8 includes a detection box 16 fixedly installed at the end of the second connecting pipe 5 away from the first connecting pipe 4, a partition 17 is fixedly installed in the cavity of the detection box 16, a first telescopic device 18 with one end penetrating the partition 17, a third telescopic device 23 with one end penetrating the partition 17 and a main controller 28 are fixedly installed on the side wall of the detection box 16 away from the second connecting pipe 5, a second telescopic device 21 adapted to the position of the first telescopic device 18 and the third telescopic device 23 is fixedly installed on the inner side wall of the detection box 16, and a sleeve ring 22 is fixedly connected to the telescopic end of the second telescopic device 21, and the sleeve ring A burning bottle 19 adapted to the second connecting pipe 5 is provided in 22, a weighing device 24 for weighing is provided at the telescopic end of the third telescopic device 23, a burning device 26 for burning fly ash is provided on one side of the detection box 16, a first heat insulation board 25 is fixedly installed on a side of the weighing device 24 away from the third telescopic device 23, a second heat insulation board 27 is fixedly installed on a side of the detection box 16 away from the third telescopic device 23, the second heat insulation board 27 and the side wall of the detection box 16 near the second connecting pipe 5 are both provided with a limiting groove 20 adapted to the burning bottle 19, and a vibration excitation device 29 for vibrating the burning bottle 19 is fixedly installed at the telescopic end of the first telescopic device 18.

[0047] Specifically, when installing the smoke exhaust pipe 1, the collecting pipe 2 is installed between the smoke exhaust pipes 1 in the horizontal direction through the mounting flange. When the carbon content of the boiler fly ash needs to be detected, the first connecting pipe 4 is driven to the lower side of the collecting pipe 2 by starting the driving unit 14. At this time, the first through-holes 6 and the second through-holes 7 at both ends of the first connecting pipe 4 are aligned, and the detection box 16 is in a horizontal position. The second telescopic device 21 is started by the main controller 28, and the telescopic end of the second telescopic device 21 drives the sleeve ring 22 to move, and the sleeve ring 22 drives the ignition bottle 19 to move on the partition 17. The weighing device 24 is set to zero, and the ignition bottle 19 moves to the top of the weighing device 24. The weighing device 24 weighs the ignition bottle 19, and the second telescopic device 21 is used again. Move the burning bottle 19 to the telescopic end position of the first telescopic device 18, start the first telescopic device 18, and the telescopic end of the first telescopic device 18 pushes the burning bottle 19 to move in the sleeve ring 22. The upper end of the burning bottle 19 is tightly against the limit groove 20 and is adapted to the lower end of the second connecting pipe 5. The first electrically controlled solenoid valve 3 is controlled to be closed by the main controller 28, and the two second electrically controlled solenoid valves 9 are opened at the same time. Since the collecting pipe 2 is closed by the first electrically controlled solenoid valve 3, the flue gas in the smoke exhaust pipe 1 will enter the first connecting pipe 4 through the first through-hole 6. After the smoke enters the first connecting pipe 4, a part of the smoke will enter the third connecting pipe 11 and move to the smoke exhaust pipe 1 again through the second through-hole 7. At this time, the fly ash in the smoke will be blocked by the filter plate 12, and most of it will be blocked by the filter plate 12. Part of the fly ash will fall into the burning bottle 19 through the second connecting pipe 5, and a small part of the fly ash from the first connecting pipe 4 will adhere to one side of the filter plate 12. Since the third connecting pipe 11 guides a part of the flue gas to the scraper plate 13, and the end of the third connecting pipe 11 close to the scraper plate 13 is tangent to the side of the first connecting pipe 4, the flue gas introduced by the third connecting pipe 11 will push the scraper plate 13 to rotate. When the scraper plate 13 rotates, the fly ash adhered to one side of the filter plate 12 will be scraped off. At this time, the fly ash contained in the flue gas for a certain distance or time in the exhaust pipe 1 is collected more completely, thereby improving the accuracy of detecting the carbon content of the fly ash in the exhaust pipe 1. After the fly ash is collected, the first electrically controlled solenoid valve 3 is opened and the two second electrically controlled solenoid valves 9 are closed. The telescopic end of the telescopic device 18 moves downward, and the calcination bottle 19 is located on the partition 17. The telescopic end of the second telescopic device 21 pushes the calcination bottle 19 to move to the position of the weighing device 24 through the movable sleeve ring 22, and the third telescopic device 23 is started. The telescopic end of the third telescopic device 23 pushes the calcination bottle 19 to seal with the second insulation board 27. The first insulation board 25 and the second insulation board 27 are insulation materials in the prior art. The calcination bottle 19 is weighed again by the weighing device 24, and the calcination device 26 is started to perform high-temperature calcination on the fly ash in the calcination bottle 19. After the high-temperature calcination is cooled, the calcination bottle 19 is weighed again by the weighing device 24, and multiple groups of data are transmitted to the main controller 28. The main controller 28 calculates the carbon content of the fly ash.The carbon content in the fly ash is detected online by the calculation formula: fly ash carbon content (C) = (ash sample and container mass before burning - ash sample and container mass after burning) / (ash sample mass before burning - container mass) × 100%, and the data is transmitted to the external interactive platform through the main controller 28.

[0048] As a technical optimization solution of the present invention, the driving unit 14 includes two second connecting rings 30 fixedly installed on the side of the collecting tube 2, a driving motor 31 is fixedly installed on the side of the second connecting ring 30, a gear 32 is fixedly installed on the output end of the driving motor 31, a tooth groove 33 meshing with the gear 32 is opened on the side of the first connecting ring 10, two third through-holes 34 and a fourth through-hole 35 adapted to the first through-hole 6 and the second through-hole 7 are opened on the side of the collecting tube 2, and a first guide plate 36 adapted to the third through-hole 34 and a second guide plate 37 adapted to the fourth through-hole 35 are fixedly connected to the inner wall of the collecting tube 2.

[0049] Specifically, after the detection is completed, the burning bottle 19 is moved to the first telescopic device 18 again through the second telescopic device 21, and the upper part of the burning bottle 19 is pressed against the position of the limit groove 20 through the first telescopic device 18. At this time, the driving motor 31 is started, and the output end of the driving motor 31 drives the gear 32 to rotate. The gear 32 drives the first connecting ring 10 to rotate along the collecting pipe 2 through the tooth groove 33 meshing therewith, and the exciting device 29 is turned on. The exciting device 29 is an exciter in the prior art, which vibrates the burning bottle 19. When the first connecting pipe 4 rotates to the top of the collecting pipe 2, the two ends of the first connecting pipe 4 are aligned with the third through-hole 34 and the fourth through-hole 35 respectively. At this time, the two second electrically controlled solenoid valves 9 are opened, and the burnt fly ash falls through the second connecting pipe 5. The high-speed flowing flue gas in the collecting pipe 2 is Due to the guidance of the first guide plate 36, the flue gas has a downward direction after passing through the first guide plate 36, so the flue gas flowing along the smoke exhaust pipe 1 will not enter the end of the first connecting pipe 4 located at the third through-hole 34, and the flue gas guided by the first guide plate 36 will hit the inclined second guide plate 37, the inclination angle of the second guide plate 37 is just adapted to the position of the fourth through-hole 35, and part of the high-speed flowing flue gas will be guided to the first connecting pipe 4 located at one end of the fourth through-hole 35, and the flue gas drives the burnt fly ash to be discharged through the third through-hole 34 and discharged into the collecting pipe 2 again, and the flue gas circulates to clean the burnt fly ash in the burning bottle 19, and when the amount of fly ash in the first connecting pipe 4 gradually decreases to a certain threshold, the second electrically controlled solenoid valve 9 is closed to wait for the next detection.

[0050] As a technical optimization solution of the present invention, the vibration unit 15 includes a plurality of elastic rods 38 fixedly mounted on the side of the second connecting ring 30. The elastic rods 38 are elastic and one end thereof is adapted to the position of the first connecting tube 4. The end of the elastic rod 38 away from the second connecting ring 30 is fixedly connected to a vibration ball 39.

[0051] Specifically, when the driving unit 14 drives the first connecting ring 10 to rotate along the collecting pipe 2, the first connecting tube 4 will push the vibrating ball 39 fixedly connected to the elastic rod 38 to move. When the first connecting tube 4 continues to move, it will break away from the vibrating ball 39. The bent elastic rod 38 rebounds and drives the vibrating ball 39 to hit the side of the first connecting tube 4, which has a vibrating effect on the first connecting tube 4, helps the fly ash adhered to the side of the first connecting tube 4 and the ignition bottle 19 to fall, and improves the effect of cleaning the first connecting tube 4 and the ignition bottle 19.

[0052] As a technical optimization solution of the present invention, a fourth connecting tube 40 and a fifth connecting tube 41 with a disassembly effect and adapted to the first connecting tube 4 are provided in the middle position of the first connecting tube 4, the second connecting tube 5 is provided on the side of the fourth connecting tube 40, the filter plate 12 is installed in the fifth connecting tube 41, a first mounting rod 42 is fixedly installed in the fourth connecting tube 40, one end of the first mounting rod 42 is rotatably connected to a rotating seat 49, a plurality of scraping plates 13 are fixedly connected to the side of the rotating seat 49, a pushing unit for pushing the filter plate 12 to be tightly against the scraping plate 13 is provided in the fifth connecting tube 41, and the pushing unit includes a push unit provided in the fifth connecting tube There is a bucket-shaped air guide cover 43 in 41, and a second mounting rod 44 with a triangular cross-section is fixedly installed between the side surface of the air guide cover 43 and the inner wall of the fifth connecting pipe 41. A movable rod 45 with one end connected to the filter plate 12 runs through the air guide cover 43, and a baffle 46 is fixedly connected to the end of the movable rod 45 away from the filter plate 12. A spring 47 sleeved on the side of the movable rod 45 is fixedly connected between one side of the baffle 46 and the inner wall of the air guide cover 43, and a polygonal rectangular limit block 48 is fixedly connected to the end of the movable rod 45 close to the filter plate 12, and a rectangular limit opening 50 adapted to the rectangular limit block 48 is opened on one side of the filter plate 12.

[0053] Specifically, the fourth connecting pipe 40 and the fifth connecting pipe 41 are installed through the mounting flange, and are connected to the first connecting pipe 4 through the mounting flange, so as to facilitate their installation or the replacement of the filter plate 12 in the later stage. Since the spring 47 always exerts a pulling force on the baffle plate 46 toward the filter plate 12, the filter plate 12 is always against the side surfaces of the plurality of scraping plates 13, and the movable rod 45 is cooperated to improve the service life of the fly ash scraping on the filter plate 12. The bucket-shaped air guide cover 43 and the second mounting rod 44 with a triangular cross section reduce the obstruction to the flow of smoke. 3 or when the filter plate 12 is replaced, the fourth connecting pipe 40, the fifth connecting pipe 41 and the first connecting pipe 4 are disassembled through the mounting flange, the rectangular limiting opening 50 is pulled out from the side of the rectangular limiting block 48, the rectangular limiting opening 50 on the new filter plate 12 is sleeved on the side of the rectangular limiting block 48, the filter plate 12 is inserted into one end of the fourth connecting pipe 40, one side of the filter plate 12 is against the scraping plate 13, and the fourth connecting pipe 40 and the fifth connecting pipe 41 are installed through the mounting flange, and the fifth connecting pipe 41 and the fourth connecting pipe 40 are installed on the first connecting pipe 4 again through the mounting flange.

[0054] As a technical optimization solution of the present invention, a sealing ring 51 and a plurality of balls 52 adapted to the first through-hole 6 or the second through-hole 7 are embedded in the inner wall of the first connecting ring 10, and a take-in and put-out port 53 adapted to the ignition bottle 19 is opened on one side of the detection box 16.

[0055] Specifically, a plurality of sealing rings 51 improve the sealing performance between the first connecting tube 4 and the collecting tube 2, and the ball 52 reduces the friction coefficient between the first connecting ring 10 and the collecting tube 2 when the first connecting ring 10 is rotated. The taking-in and putting-out opening 53 facilitates the taking-in and putting-out of the calcination bottle 19, and by starting the second telescopic device 21 to move the sleeve ring 22 to a position adapted to the taking-in and putting-out opening 53, the calcination bottle 19 can be taken-in and put, which facilitates the installation of the calcination bottle 19 or its later removal for cleaning and replacement.

[0056] Embodiment 2

[0057] An online detection method for the carbon content of fly ash in a coal-fired power plant boiler comprises the online detection device for the carbon content of fly ash in a coal-fired power plant boiler in the first embodiment above, and the method comprises the following steps:

[0058] S1: Preparation stage: Start the driving unit 14 to drive the first connecting pipe 4 to the lower side of the collecting pipe 2 and the first through-hole 6 and the second through-hole 7, start the second telescopic device 21 to drive the burning bottle 19 to the upper side of the weighing device 24, and record the initial weight of the burning bottle 19 through the main controller 28, and drive the burning bottle 19 to the position of the first telescopic device 18 again through the second telescopic device 21, and start the first telescopic device 18 to push the burning bottle 19 to the second connecting pipe 5;

[0059] S2: Collecting fly ash: Close the first electrically controlled solenoid valve 3, open the two second electrically controlled solenoid valves 9, the smoke in the smoke exhaust pipe 1 enters the first connecting pipe 4 through the first through-hole 6, the fly ash is intercepted by the filter plate 12 and falls into the burning bottle 19, and at the same time, part of the smoke blows the scraping plate 13 to rotate through the third connecting pipe 11, and the fly ash on the filter plate 12 is scraped into the burning bottle 19. After the fly ash is collected, open the first electrically controlled solenoid valve 3 and close the second electrically controlled solenoid valve 9;

[0060] S3: Detecting the carbon content: The telescopic end of the first telescopic device 18 moves downward, and the telescopic end of the second telescopic device 21 drives the burning bottle 19 to move to the weighing device 24, and the third telescopic device 23 is started to drive the upper end of the burning bottle 19 to completely fit with the second heat insulation board 27, and the burning device 26 is turned on to burn the fly ash in the burning bottle 19. After the burning is completed, the burning bottle 19 is weighed by the weighing device 24, and the carbon content of the fly ash is calculated by the main controller 28;

[0061] S4: Cleaning stage: After the carbon content of the fly ash in the smoke exhaust pipe 1 is detected, the burning bottle 19 is moved to a position matching the second connecting pipe 5 through the cooperation of the second telescopic device 21 and the first telescopic device 18 again, and the first connecting ring 10 is driven by the driving motor 31 to rotate along the collecting pipe 2. At the same time, the vibrating ball 39 knocks and vibrates the first connecting pipe 4 to rotate the first connecting pipe 4 to the upper side of the collecting pipe 2, and the second electrically controlled solenoid valve 9 is opened. In cooperation with the first guide plate 36 and the second guide plate 37, the burnt fly ash slides into the collecting pipe 2 and is discharged.

[0062] Among them, all the above-mentioned electrical products can be purchased on the market. They are mature technologies and have been fully disclosed, so they are not repeated in the specification. All the above-mentioned electrical products are equipped with power connection lines, and they are electrically connected to the main controller 28 and 220V phase voltage (or chemical power supply) through the power lines, and the main controller 28 can be a conventional known device such as a computer that plays a control role.

[0063] Finally, it should be noted that in the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0064] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0065] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An online detection device for the carbon content of fly ash in a coal-fired power plant boiler, comprising a collecting pipe (2) installed in the middle of a horizontal exhaust pipe (1), characterized in that: The smoke exhaust pipe (1) is provided with a first electrically controlled solenoid valve (3) for controlling the opening and closing of the collection pipe (2); two first connecting rings (10) are provided on the side of the collection pipe (2) and are located on both sides of the first electrically controlled solenoid valve (3); a first connecting pipe (4) communicating with the collection pipe (2) is provided between the lower sides of the two first connecting rings (10); a second connecting pipe (5) communicating with the collection pipe (2) is provided on the side of the first connecting pipe (4) away from the collection pipe (2); two first through openings (6) and a second through opening (7) adapted to the two ends of the first connecting pipe (4) are provided on the lower side of the collection pipe (2); a detection unit (8) for collecting and detecting fly ash is provided on the end of the second connecting pipe (5) away from the first connecting pipe (4); and both ends of the first connecting pipe (4) are provided with A second electrically controlled solenoid valve (9) for controlling the opening and closing of a first connecting tube (4); a filter plate (12) adapted to the upper end position of the second connecting tube (5) is provided in the first connecting tube (4); a scraper plate (13) having a rotating effect and abutting against one side of the filter plate (12) is provided on one side of the filter plate (12) facing the first through-hole (6); a third connecting tube (11) is provided between the side surface of one end of the first connecting tube (4) close to the first through-hole (6) and the side surface in the middle thereof, the third connecting tube (11) being connected and adapted to the scraper plate (13) at one end; a driving unit (14) for driving the first connecting ring (10) to rotate along the collecting tube (2) is provided on the side surface of the collecting tube (2); and a vibration unit (15) for vibrating the first connecting tube (4) is also provided on the side surface of the collecting tube (2).

2. The on-line detection device for carbon content in fly ash of a coal-fired power plant boiler according to claim 1 is characterized in that: The detection unit (8) comprises a detection box (16) fixedly mounted on an end of the second connecting pipe (5) away from the first connecting pipe (4); a partition (17) is fixedly mounted in a cavity of the detection box (16); a first telescopic device (18) having one end penetrating the partition (17), a third telescopic device (23) having one end penetrating the partition (17), and a main controller (28) are fixedly mounted on a side wall of the detection box (16) away from the second connecting pipe (5); and a main controller (28) is fixedly mounted on the inner side wall of the detection box (16) A second telescopic device (21) is installed to match the position of the first telescopic device (18) and the third telescopic device (23); a sleeve ring (22) is fixedly connected to the telescopic end of the second telescopic device (21); a burning bottle (19) matching the second connecting pipe (5) is arranged inside the sleeve ring (22); a weighing device (24) for weighing is arranged at the telescopic end of the third telescopic device (23); and a burning device (26) for burning fly ash is arranged on one side of the detection box (16).

3. The on-line detection device for carbon content in fly ash of a coal-fired power plant boiler according to claim 2 is characterized in that: A first heat insulation board (25) is fixedly mounted on a side of the weighing device (24) away from the third telescopic device (23); a second heat insulation board (27) is fixedly mounted on a side of the detection box (16) away from the third telescopic device (23); the second heat insulation board (27) and a side wall of the detection box (16) close to the second connecting pipe (5) are both provided with a limiting groove (20) adapted to the burning bottle (19); and a vibration excitation device (29) for vibrating the burning bottle (19) is fixedly mounted on the telescopic end of the first telescopic device (18).

4. The on-line detection device for carbon content in fly ash of a coal-fired power plant boiler according to claim 1 is characterized in that: The driving unit (14) comprises two second connecting rings (30) fixedly mounted on the side of the collecting tube (2); a driving motor (31) is fixedly mounted on the side of the second connecting ring (30); a gear (32) is fixedly mounted on the output end of the driving motor (31); a tooth groove (33) meshing with the gear (32) is provided on the side of the first connecting ring (10); two third through-holes (34) and a fourth through-hole (35) are provided on the side of the collecting tube (2) and are matched with the first through-hole (6) and the second through-hole (7); a first guide plate (36) matched with the third through-hole (34) and a second guide plate (37) matched with the fourth through-hole (35) are fixedly connected to the inner wall of the collecting tube (2).

5. The on-line detection device for carbon content in fly ash of a coal-fired power plant boiler according to claim 4 is characterized in that: The vibration unit (15) comprises a plurality of elastic rods (38) fixedly mounted on the side of the second connecting ring (30), the elastic rods (38) are elastic and one end of the elastic rods (38) is adapted to the position of the first connecting pipe (4), and one end of the elastic rods (38) away from the second connecting ring (30) is fixedly connected to a vibration ball (39).

6. The on-line detection device for carbon content in fly ash of a coal-fired power plant boiler according to claim 1 is characterized in that: A fourth connecting tube (40) and a fifth connecting tube (41) having a disassembly effect and adapted to the first connecting tube (4) are provided at the middle of the first connecting tube (4); the second connecting tube (5) is provided on the side of the fourth connecting tube (40); the filter plate (12) is installed in the fifth connecting tube (41); a first mounting rod (42) is fixedly installed in the fourth connecting tube (40); one end of the first mounting rod (42) is rotatably connected to a rotating seat (49); a plurality of scraping plates (13) are fixedly connected to the side of the rotating seat (49); and a pushing unit for pushing the filter plate (12) and the scraping plate (13) to be tightly pressed against each other is provided in the fifth connecting tube (41).

7. The on-line detection device for carbon content in fly ash of a coal-fired power plant boiler according to claim 6 is characterized in that: The pushing unit comprises a bucket-shaped air guide cover (43) arranged in the fifth connecting tube (41); a second mounting rod (44) with a triangular cross-section is fixedly installed between the side of the air guide cover (43) and the inner wall of the fifth connecting tube (41); a movable rod (45) having one end connected to the filter plate (12) passes through the air guide cover (43); a baffle (46) is fixedly connected to the end of the movable rod (45) away from the filter plate (12); and a spring (47) sleeved on the side of the movable rod (45) is fixedly connected between one side of the baffle (46) and the inner wall of the air guide cover (43).

8. The on-line detection device for carbon content in fly ash of a coal-fired power plant boiler according to claim 7 is characterized in that: A polygonal rectangular stopper (48) is fixedly connected to one end of the movable rod (45) close to the filter plate (12), and a rectangular stopper opening (50) adapted to the rectangular stopper block (48) is provided on one side of the filter plate (12).

9. The on-line detection device for carbon content in fly ash of a coal-fired power plant boiler according to claim 2, characterized in that: A sealing ring (51) and a plurality of balls (52) adapted to the first through-hole (6) or the second through-hole (7) are embedded in the inner wall of the first connecting ring (10), and a take-in and put-out opening (53) adapted to the burning bottle (19) is opened on one side of the detection box (16).

10. An online detection method for the carbon content of fly ash in a coal-fired power plant boiler, comprising the online detection device for the carbon content of fly ash in a coal-fired power plant boiler described in 1-9 above, the method comprising the following steps: S1: Preparation stage: Start the driving unit (14) to drive the first connecting tube (4) to the lower side of the collecting tube (2) and to the matching position with the first through-hole (6) and the second through-hole (7), start the second telescopic device (21) to drive the burning bottle (19) to the upper side of the weighing device (24), and record the initial weight of the burning bottle (19) through the main controller (28), and drive the burning bottle (19) to move to the position of the first telescopic device (18) again through the second telescopic device (21), and start the first telescopic device (18) to push the burning bottle (19) toward the second connecting tube (5); S2: collecting fly ash: closing the first electrically controlled solenoid valve (3), opening the two second electrically controlled solenoid valves (9), the smoke in the smoke exhaust pipe (1) enters the first connecting pipe (4) through the first through-hole (6), the fly ash is intercepted by the filter plate (12) and falls into the burning bottle (19), and at the same time, part of the smoke passes through the third connecting pipe (11) to blow the scraping plate (13) to rotate, scraping the fly ash on the filter plate (12) into the burning bottle (19), and after the fly ash is collected, opening the first electrically controlled solenoid valve (3) and closing the second electrically controlled solenoid valve (9); S3: Detecting the carbon content: the telescopic end of the first telescopic device (18) moves downward, and the telescopic end of the second telescopic device (21) drives the burning bottle (19) to move onto the weighing device (24), and the third telescopic device (23) is started to drive the upper end of the burning bottle (19) to completely fit the second heat insulation board (27), and the burning device (26) is turned on to burn the fly ash in the burning bottle (19). After the burning is completed, the burning bottle (19) is weighed by the weighing device (24), and the carbon content of the fly ash is calculated by the main controller (28); S4: Cleaning stage: After the carbon content of the fly ash in the smoke exhaust pipe (1) is detected, the burning bottle (19) is moved to a position matching the second connecting pipe (5) through the cooperation of the second telescopic device (21) and the first telescopic device (18), and the first connecting ring (10) is driven by the driving motor (31) to rotate along the collecting pipe (2). At the same time, the vibrating ball (39) knocks and vibrates the first connecting pipe (4) to rotate the first connecting pipe (4) to the upper side of the collecting pipe (2), and the second electrically controlled solenoid valve (9) is opened. In cooperation with the first guide plate (36) and the second guide plate (37), the burnt fly ash slides into the collecting pipe (2) and is discharged.

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