An automatic coal-fired boiler blockage removal device

Abstract

The present invention discloses an automatic blockage removal device for a coal-fired boiler, which is installed on a slag channel communicating with a slag discharge port and includes an actuator, a steel drill rod, a crushing blade, a shut-off door, and a sealing device; one side of the shut-off door is connected to one end of a cylinder body, the steel drill rod is installed inside the cylinder body, a crushing blade is provided at the front end of the steel drill rod, and the rear end of the steel drill rod is connected to a push rod of the actuator that can perform repeated linear motion. The automatic blockage removal device for a coal-fired boiler of the present invention is a blockage removal device that can perform automatic operation, replaces the current manual blockage removal, has significantly improved blockage removal effect compared to manual blockage removal, higher blockage removal efficiency, saves time and effort, and is safe and reliable.

Description

Technical Field

[0001] The present invention relates to the technical field of blockage removal devices, and particularly to an automatic blockage removal device for a coal-fired boiler. Background Art

[0002] During the operation of a coal-fired boiler in a thermal power plant, coking and the phenomenon of castable falling off and blocking the slag discharge port often occur. Once blocked, the bottom slag of the boiler cannot be discharged in time, the height of the boiler bed material will increase, affecting the normal operation of the boiler. If not dredged in time, it will cause great economic losses to the power plant.

[0003] To ensure the normal operation of the boiler, the power plant needs to carry out blockage removal. Usually, special personnel are equipped for manual blockage removal, which is not only time-consuming and laborious, but also because the bottom slag temperature is as high as 1000°C, and due to heat radiation around the slag tapping port, the ambient temperature is very high. Workers usually carry out manual blockage removal at the risk of high temperature and scalding. If it goes smoothly, it can be dredged quickly. If not, it will take a long time to operate. Moreover, the boiler is frequently blocked and needs to be manually blocked and removed frequently. The workload is large, the working intensity is high, the working conditions are harsh and dangerous, and the blockage removal effect is also very poor. Summary of the Invention

[0004] The purpose of the present invention is to provide a blockage removal device and an automatic blockage removal device for a coal-fired boiler that can replace the current manual blockage removal and can achieve automatic operation in view of the technical defects existing in the prior art.

[0005] The technical solution adopted to achieve the purpose of the present invention is:

[0006] An automatic blockage removal device for a coal-fired boiler, which is installed on the slag channel communicating with the slag discharge port, and includes an actuator, a steel drill rod, a crushing edge, a shut-off door, and a sealing device; one side of the shut-off door is connected to one end of a cylinder body, the steel drill rod is installed inside the cylinder body, a crushing edge is provided at the front end of the steel drill rod, the rear end of the steel drill rod is connected to a push rod that can move linearly repeatedly of the actuator, and a sealing device is provided inside the cylinder body.

[0007] The other end of the cylinder body is connected to a perforated end cover with a T-shaped structure by bolts.

[0008] The crushing edge includes a plurality of blade bodies in the shape of right-angled triangles, which are evenly arranged on the outer wall of the front end of the steel drill rod.

[0009] The automatic blockage removal device for a coal-fired boiler of the present invention is a blockage removal device that can perform automatic operation, replacing the current manual blockage removal. Its blockage removal effect is significantly improved compared with manual blockage removal, the blockage removal efficiency is higher, it saves time and effort, and is safe and reliable. Brief Description of the Drawings

[0010] Figure 1 It is a schematic structural diagram of an automatic blockage removal device for a coal-fired boiler. Detailed implementation mode

[0011] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0012] See Figure 1 As shown, an automatic slag-blockage clearing device for a coal-fired boiler includes an actuator 1, a steel drill 2, a crushing blade 3, an electric shut-off door 4, and a sealing device 5, which are installed on a slag channel communicating with a slag discharge port. One side of the shut-off door is connected to one end of a cylinder 6, and the steel drill is installed inside the cylinder. A crushing blade is provided at the front end of the steel drill, and the crushing blade is inside the cylinder. A push rod (not shown) that can move linearly repeatedly of the actuator is connected to the rear end of the steel drill. A sealing device 5 is provided inside the cylinder 6, which is arranged near the outer side end of the cylinder to block the high-temperature ash and slag brought back by the steel drill 2 and the crushing blade 3 during the return stroke, so as to avoid damaging the piston rod or push rod of the actuator 1.

[0013] Wherein, the other end (outer side end) of the cylinder is connected to a perforated end cover 7 of a T-shaped structure by bolts.

[0014] Wherein, the crushing blade includes a plurality of blade bodies in the shape of right-angled triangles, which are evenly arranged on the outer wall of the front end of the steel drill.

[0015] Furthermore, the outside of the steel drill is sleeved in a sleeve 8 connecting the cylinder and the actuator. One end of the sleeve is fixed to one end of the actuator 1, and the other end extends into the cylinder through the hole on the end cover 7. The other end of the sleeve is connected to a perforated plate 9 welded inside the cylinder. The inner diameter of the perforated plate 9 is the same as the inner diameter of the sleeve. Wherein, the outer wall of the perforated plate is hermetically connected and fixed to the inner wall of the cylinder. The steel drill extends out from the perforated plate 9 and extends towards the shut-off door. As Figure 1 shown, a sealing device 5 is filled between the perforated plate and the end cover, and between the end cover and the inner or outer wall of the sleeve and the cylinder. The sealing device 5 adopts sealing packing and other similar materials. The perforated end cover 7 of the T-shaped structure extends into the cylinder and is placed between the cylinder and the sleeve. As Figure 1 shown.

[0016] The automatic slag-blockage clearing device of the present invention is installed on a slag channel communicating with a slag discharge port. When the automatic slag-blockage clearing operation is not carried out, the electric shut-off door 4 is in a closed state, isolating the slag channel from the automatic slag-blockage clearing device to avoid damage to the automatic slag-blockage clearing device by high-temperature ash and slag. The other side of the electric shut-off door 4 can be welded and installed on the outside of a slag poking port on the slag channel communicating with the slag discharge port, and is fixedly connected to the slag poking port on the slag channel.

[0017] When the slag discharge port is blocked, first open the electric shut-off valve 4 to open the dredging channel. The actuator 1 is activated to drive the steel rod 2 to reciprocate rapidly. The crushing blade 3 installed at the end of the steel rod 2 crushes the coke lumps, castables, etc. that block the slag discharge port.

[0018] The sealing device 5 will block the high-temperature ash and slag brought back by the steel rod 2 and the crushing blade 3 during the return stroke, avoiding damage to the piston rod or push rod of the actuator 1.

[0019] The crushing blade 3 is made of high-strength stainless steel that is wear-resistant and heat-resistant, and is conical, which can gradually and powerfully crush the blockage from small to large.

[0020] After the slag discharge port is dredged, the actuator 1 retracts the steel rod 2 and the crushing blade 3, and the electric shut-off valve 4 closes to protect the automatic dredging device.

[0021] It should be noted that in the present invention, the actuator can be a pneumatic actuator such as a cylinder, or other automatic actuators such as an electric actuator or an electro-hydraulic actuator.

[0022] In the present invention, the electric shut-off valve may not be provided. If it is provided, the electric shut-off valve can be a shut-off valve driven by other automated control mechanisms such as pneumatic or electro-hydraulic drive.

[0023] In addition, it should be noted that the sealing device and the crushing blade may not be provided.

[0024] The present invention can adopt automatic control and automated operation, without the need for staff to perform high-intensity and high-risk manual operations in a high-temperature environment. Moreover, the dredging effect is significantly improved compared to manual dredging, with higher efficiency, saving time and effort, and being safe and reliable. The automatic dredging device for coal-fired boilers of the present invention is a dredging device that can perform automatic operation, replacing the current manual dredging. Its dredging effect is significantly improved compared to manual dredging, with higher dredging efficiency, saving time and effort, and being safe and reliable.

[0025] The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. An automatic coal-fired boiler blockage removal device, characterized in that, Installed on the slag channel connected to the slag discharge port, it includes an actuator, a steel rod, a crushing blade, an electric shut-off door, and a sealing device; one side of the electric shut-off door is connected to one end of the cylinder body, and the other side of the electric shut-off door is welded and installed on the outside of the slag poking port on the slag channel connected to the slag discharge port, and is fixedly connected to the slag poking port on the slag channel. The steel rod is installed inside the cylinder body. There is a crushing blade at the front end of the steel rod. The rear end of the steel rod is connected to the push rod of the actuator that can perform repeated linear motion. The outside of the steel rod is sleeved in a sleeve that connects the cylinder body and the actuator. One end of the sleeve is fixed to one end of the actuator, and the other end extends into the cylinder body through the hole on the end cover. The other end of the sleeve is connected to the orifice plate welded inside the cylinder body. The inner diameter of the orifice plate is consistent with the inner diameter of the sleeve. The outer wall of the orifice plate is hermetically connected and fixed to the inner wall of the cylinder body. The steel rod extends out from the orifice plate and towards the electric shut-off door. There is a sealing device inside the cylinder body. The sealing device is arranged at the near outer side end of the cylinder body, and the sealing device is arranged between the orifice plate and the end cover, as well as between the end cover and the sleeve, the inner wall or the outer wall of the cylinder body. The sealing device uses sealing packing; The other end of the cylinder body is connected to a perforated end cover of a T-shaped structure by bolts; The crushing blade includes a plurality of blade bodies in the shape of right triangles, which are evenly arranged on the outer wall of the front end of the steel rod.

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