Moving Coke Formation Observation System for Platen Superheater of Pulverized Coal Boiler

Abstract

The invention discloses a movable coking observation system for a platen superheater of a pulverized coal boiler, which includes the front wall of the water-cooled wall in the platen superheater area. A viewing hole is opened on the front wall of the water-cooled wall, and a small door is installed on the viewing hole. The small door is opened and closed by a cylinder. A channel steel track is provided on the front wall of the water-cooled wall, and a movable trolley is arranged on the channel steel track. A coke platform and an observation platform are arranged on the trolley. An oil cylinder is installed on the coke platform, and a high-temperature resistant metal rod is installed at the front end of the oil cylinder. An observation lens is also installed on the coke platform. A six-axis robotic arm is installed on the observation platform for clamping a coking observation device in the furnace. A cable trough is also installed under the channel steel track on the front wall, and a crawler-type cable trough is installed in the cable trough. The crawler-type cable trough connects the circuits and air paths of the equipment installed on the electric track slide trolley to the external pipelines and circuits.

Description

Technical Field

[0001] The present invention relates to the technical field of coking observation, and specifically to a system for observing coking of a platen superheater in a pulverized coal boiler. Background Art

[0002] Coking in boilers is a common problem in coal-fired power plants. It can disrupt the normal combustion conditions, reduce the boiler efficiency, damage the normal water circulation, and even cause tube explosion accidents. When a pulverized coal boiler burns high-alkali coal, coking is likely to occur in some parts of the platen superheater. Observing coking in the platen superheater area can provide good guidance for boiler operation.

[0003] The high-temperature endoscopic imaging technology in the furnace is a technology for observing boiler coking and fouling under the operating conditions of a thermal power plant boiler in recent years. This technology relies on the "dual-view full-temperature zone furnace coking observer" in the furnace. This device can be inserted into the furnace, filter the flame and observe the condition of the heating surface. This device is expensive. To observe different parts of the boiler, multiple sets of devices need to be installed, resulting in too high costs. If only one set is installed, the observation area is very limited and cannot provide good guidance for boiler operation. Therefore, a mobile coking observation system for the platen superheater of a pulverized coal boiler with a simple structure, good use effect, and capable of realizing unattended operation is proposed. Summary of the Invention

[0004] The purpose of the present invention is to provide a system for mobile coking observation of a platen superheater in a pulverized coal boiler to solve the contradiction between cost and observation effect raised in the above background art.

[0005] To achieve the above object, the present invention provides the following technical solution: a mobile coking observation system for the platen superheater of a pulverized coal boiler. It includes the front wall of the water-cooled wall in the platen superheater area. A number of viewing holes are opened on the front wall of the water-cooled wall. Small doors are installed on the viewing holes. The small doors are opened and closed by cylinders. The front wall of the water-cooled wall is also installed with channel steel rails in the left-right direction. An electric rail sliding table trolley is installed on the channel steel rails. A number of coke knocking positioners and observation positioners are also installed on the channel steel rails. A stopper is installed at each end of the channel steel rails. A coke knocking cloud platform and an observation cloud platform are installed on the electric rail sliding table trolley. An oil cylinder is installed on the coke knocking cloud platform. A high-temperature-resistant metal rod is installed at the front end of the oil cylinder. An observation lens is also installed on the coke knocking cloud platform. A six-axis robotic arm is installed on the observation cloud platform for clamping the coking observation device in the furnace. A cable trough is also installed under the channel steel rails on the front wall. A crawler-type cable trough is installed in the cable trough. The crawler-type cable trough connects the circuits and air paths of the equipment installed on the electric rail sliding table trolley to the external pipelines and circuits. The present invention is designed according to the needs of coking observation in the platen superheater area of a pulverized coal boiler in a thermal power plant and the characteristics of the boiler itself, improving the coking observation range in the platen superheater area, reducing the investment in observation devices, and effectively extending the service life of the observation equipment.

[0006] Preferably, the circuits and air paths on the relevant equipment are sorted out inside the local control box installed on the sliding table trolley and then connected to the pipelines and circuits of the external control cabinet through the crawler-type cable trough. This enables the electric rail sliding table trolley and its carried relevant equipment to have good mobility.

[0007] Preferably, the mobile coking observation system for the platen superheater of a pulverized coal boiler is controlled by an industrial control system to operate the entire system and transmit the collected images to the control room.

[0008] Preferably, the six-axis robotic arm selects a complete set of equipment with dust-proof and high-temperature-resistant properties. The coking observation device clamped by the six-axis robotic arm is used for coking observation. There is a torque sensor inside the six-axis robotic arm, which can withdraw from operation in case of abnormal situations such as jamming.

[0009] Preferably, the coking observation device is a device with specific spectral acceptance characteristics that can penetrate the flame to observe the heating surface in the furnace. The coking observation device is cooled by compressed air and is inserted into the furnace for observation by the six-axis robotic arm simulating manual operation.

[0010] Preferably, the head of the metal rod for coke knocking is of a trapezoidal structure and matches the size of the viewing hole, and can penetrate into the viewing hole.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] The movable coking observation system for the platen superheater of a pulverized coal boiler can be composed of existing components, with controllable costs. Through this device, the situation of the entire platen superheater area can be observed through the front wall of the normal superheater area of the boiler, meeting the usage requirements and controlling the cost of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a front view three-dimensional schematic diagram of the structure of the present invention.

[0014] Figure 2 It is a framework diagram of the operation process.

[0015] As shown in the figure: 1 is the front wall of the water wall, 2 is the channel steel track, 3 is the cable trough, 11 is the viewing hole A, 12 is the small door A, 13 is the cylinder A, 14 is the viewing hole B, 15 is the small door B, 16 is the cylinder B, 17 is the viewing hole C, 18 is the small door C, 19 is the cylinder C, 21 is the limiter 1, 22 is the coke-breaking locator A, 23 is the observation locator A, 24 is the coke-breaking locator B, 25 is the observation locator B, 26 is the coke-breaking locator C, 27 is the observation locator C, 28 is the limiter 2, 31 is the crawler-type cable trough, 32 is the control cabinet, 41 is the local control box, 42 is the coke-breaking platform, 43 is the oil cylinder, 44 is the observation lens, 45 is the observation platform, 46 is the six-axis robotic arm, 47 is the metal rod, 48 is the coking observation device. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The above content of the present invention will be further described in detail below through embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts belong to the scope of protection of the present invention.

[0017] Example 1: Refer to Figure 1, which is a schematic structural diagram of Embodiment 1 of the present invention. This embodiment discloses a movable coking observation system for a platen superheater of a pulverized coal boiler, which is characterized in that it includes the front water wall (1) in the platen superheater area. A number of viewing holes (11, 14, 17) are opened in the front water wall, and small doors (12, 15, 18) are installed on the viewing holes. The small doors are opened and closed by cylinders (13, 16, 19). A channel steel track (2) in the left-right direction is also installed on the front water wall. An electric track sliding table trolley (4) is installed on the channel steel track. A number of coke knocking positioners (22, 24, 26) and observation positioners (23, 25, 27) are also installed on the channel steel track. A stopper (21, 28) is installed at each end of the channel steel track. A coke knocking cloud platform (42) and an observation cloud platform (45) are installed on the electric track sliding table trolley. An oil cylinder (43) is installed on the coke knocking cloud platform (42), and a high-temperature resistant metal rod (47) is installed at the front end of the oil cylinder. An observation lens (44) is also installed on the coke knocking cloud platform (42). A six-axis robotic arm (46) is installed on the observation cloud platform (45), and the six-axis robotic arm (46) is used to clamp the in-furnace coking observation device (48). A cable trough (3) is also installed under the channel steel track on the front wall, and a crawler cable trough (31) is installed in the cable trough.

[0018] The head of the metal rod (47) is of a trapezoidal structure and matches the size of the viewing hole, and can penetrate into the viewing hole.

[0019] A control box (41) is provided on the sliding table trolley. The circuits and air paths of the coke knocking cloud platform (42) and the observation cloud platform (45) are placed inside the control box (41). After being sorted out, the circuits and air paths are connected to the pipelines and circuits of the external control cabinet (32) through the crawler cable trough (31) for the circuits and air paths of the equipment installed on the electric track sliding table trolley.

[0020] An industrial control system is installed in the control cabinet (32) to control the operation of the entire system and transmit the collected images to the control room.

[0021] The six-axis robotic arm (46) installed on the observation cloud platform (45). The six-axis robotic arm selects a complete set of equipment with dust-proof and high-temperature resistance. The coking observation device (48) clamped by the six-axis robotic arm is a device with specific spectral acceptance characteristics that can penetrate the flame to observe the in-furnace heating surface.

[0022] An oil cylinder (43) is installed on the coke knocking cloud platform (42). A high-temperature resistant metal rod (47) is installed at the head of the oil cylinder (43). An observation lens (44) for observing the coke knocking hole is installed on the coke knocking cloud platform (42). The image transmitted back by the observation lens (44) is used to judge whether the coke knocking is successful.

[0023] There is a torque sensor inside the six-axis robotic arm (46). In case of abnormal conditions such as jamming, it can stop running to protect the coke deposition observation device (48).

[0024] The front wall of the water-cooled wall in the platen superheater area (1) is provided with several viewing holes (11, 14, 17). The conditions of the heating surface inside the furnace can be observed through these viewing holes. Small doors (12, 15, 18) are installed on the viewing holes. The small doors are opened and closed by cylinders (13, 16, 19), which are opened before observation and closed after observation. Channels (2) in the left-right direction are installed at an appropriate height on the front wall of the water-cooled wall. The channels are used to install an electric rail sliding table trolley (4). Related equipment is installed on the electric rail sliding table trolley, including a coke knocking platform (42) and an observation platform (45). An oil cylinder (43) is installed on the coke knocking platform. A high-temperature resistant metal rod (47) is installed at the front end of the oil cylinder. The metal rod (47) can be pushed by the oil cylinder (43) to knock coke. An observation lens (44) is also installed on the coke knocking platform to observe the viewing holes (11, 14, 17) to determine whether the coke knocking is successful. A six-axis robotic arm (46) is installed on the observation platform to clamp the coke deposition observation device (48) inside the furnace and rotate the coke deposition observation device (48) inside the furnace after sending it into the viewing hole to observe the coke deposition situation inside the furnace.

[0025] Several coke knocking positioners (22, 24, 26) and observation positioners (23, 25, 27) are also installed on the channels. They can position the electric rail sliding table trolley (4) at the specified position so that related components can work at the corresponding positions. A stopper (21, 28) is installed at each end of the channels to limit the moving position of the electric rail sliding table trolley (4) and make it stay at one of the two ends when it stops working. A cable trough (3) is also installed below the channels. A crawler cable trough (31) is installed in the cable trough to organize the cables and cooling air pipes, enabling the electric rail sliding table trolley (4) to move and work.

[0026] The local control box (41) installed on the electric rail sliding table trolley (4) moves with the trolley, facilitating wiring. After internal arrangement, the circuits and air paths of the equipment installed on the electric rail sliding table trolley are connected to the pipelines and circuits of the external control cabinet (32) through the crawler cable trough (31). An industrial control system is installed in the control cabinet (32) to control the operation of the entire system and transmit the collected images to the control room.

Claims

1. A movable coke deposition observation system for a platen superheater of a pulverized coal boiler, characterized in that: The front water-cooled wall (1) including the platen superheater area, several viewing holes (11, 14, 17) are opened on the front water-cooled wall, small doors (12, 15, 18) are installed on the viewing holes, the small doors are opened and closed by cylinders (13, 16, 19), the front water-cooled wall is also installed with channel steel rails (2) in the left-right direction, an electric rail sliding table trolley (4) is installed on the channel steel rails, several coke knocking positioners (22, 24, 26) and observation positioners (23, 25, 27) are also installed on the channel steel rails, limiters (21, 28) are installed at both ends of the channel steel rails, a coke knocking cloud platform (42) and an observation cloud platform (45) are installed on the electric rail sliding table trolley, an oil cylinder (43) is installed on the coke knocking cloud platform (42), a high-temperature resistant metal rod (47) is installed at the front end of the oil cylinder, an observation lens (44) is also installed on the coke knocking cloud platform (42), a six-axis robotic arm (46) is installed on the observation cloud platform (45), the six-axis robotic arm (46) is used to clamp the in-furnace coke formation observation device (48), a cable trough (3) is also installed under the channel steel rails on the front wall, and a crawler cable trough (31) is installed in the cable trough; A control box (41) is provided on the sliding table trolley, the circuits and air paths of the coke knocking cloud platform (42) and the observation cloud platform (45) are placed inside the control box (41), and after being sorted out, the circuits and air paths of the equipment installed on the electric rail sliding table trolley are connected to the pipelines and circuits of the external control cabinet (32) through the crawler cable trough (31); An industrial control system is installed in the control cabinet (32) to control the operation of the whole system and transmit the collected images to the control room; A six-axis robotic arm (46) is installed on the observation cloud platform (45), the six-axis robotic arm selects a complete set of equipment with dust-proof and high-temperature resistance, and the coke formation observation device (48) clamped by the six-axis robotic arm is a device with specific spectral acceptance characteristics that can penetrate the flame to observe the in-furnace heating surface; An oil cylinder (43) is installed on the coke knocking cloud platform (42), a high-temperature resistant metal rod (47) is installed at the head of the oil cylinder (43), an observation lens (44) for observing the coke knocking hole is installed on the coke knocking cloud platform (42), and the image transmitted back by the observation lens (44) is used to judge whether the coke knocking is successful.

2. The movable coke formation observation system for the platen superheater of a pulverized coal boiler according to claim 1, characterized in that: The head of the metal rod (47) is of a trapezoidal structure and matches the size of the viewing hole, and can penetrate into the viewing hole.

3. The movable coke formation observation system for the platen superheater of a pulverized coal boiler according to claim 1, wherein: A torque sensor is installed inside the six-axis robotic arm (46), and it exits the operation in case of abnormal conditions to protect the coke formation observation device (48).

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