Deslagging device capable of reducing dust raising influence during slagging of coal mill

Abstract

The utility model discloses a deslagging device capable of reducing the influence of dust raising during deslagging of a coal mill, which relates to the technical field of thermoelectricity and comprises a coal mill body, and a dust falling component for spraying water to slag is assembled at the position of a discharge port of the coal mill body. The dust falling assembly comprises a frame shell fixed to the position of a discharging port of the coal mill body, feeding ports are formed in the position of the frame shell and the position of the discharging port, spoilers for prolonging the slag retention time are arranged on the inner wall of the frame shell in a staggered mode, and water spraying grids are installed in the upper space and the lower space of every two adjacent spoilers. According to the utility model, the retention time of slag discharging is prolonged through the dust falling assembly, enough time can be provided for the atomizing nozzle to carry out dust falling treatment, and meanwhile, the gap between the spoiler and the frame shell can be indirectly changed, so that the condition of internal flying dust leakage is blocked, the device can be ensured to sufficiently carry out dust falling on the slag, and the dust falling efficiency is improved. Therefore, the life health of workers around the device is ensured.

Description

Technical Field

[0001] This utility model relates to the field of thermoelectric technology, specifically to a slag discharge device that reduces the impact of dust generated by coal mill slag discharge. Background Technology

[0002] Thermal power plants typically use coal as their raw material for power generation. Before entering the boiler for combustion, the coal is pulverized by a coal mill to ensure that the particle size of the coal entering the boiler is within the appropriate mesh size, thereby achieving optimal combustion. While grinding the raw coal, the coal mill also removes impurities such as stones and wires to prevent them from affecting the boiler's combustion efficiency. These impurities are usually discharged directly onto the ground through the coal mill's ash discharge port and then transported away manually or mechanically. Because these impurities contain a large amount of dust, they are dispersed into the surrounding area during discharge, polluting the environment and affecting the health of nearby workers.

[0003] A search of the China Patent Network revealed a slag discharge device for reducing dust pollution from coal mill slag discharge. This device, through the setup of a water tank and a water pump, works by connecting the water pump to the power supply when the coal mill body finishes grinding and discharges the coal. This causes the water in the water tank to be sent out through the water outlet pipe, and then sprayed out through the conduit and atomizing nozzle, thereby greatly achieving the effect of preventing dust pollution.

[0004] However, the above technical solutions still have certain defects. The dust suppression path of the slag discharged from the coal mill is too short. Due to the blockage or blind spots of the atomizing nozzles, some dust may be scattered, resulting in incomplete dust suppression of the slag and thus endangering the health of the surrounding workers. Therefore, a slag discharge device to reduce the impact of dust discharge from the coal mill is proposed. Utility Model Content

[0005] Therefore, the purpose of this utility model is to provide a slag discharge device that reduces the impact of slag dust from coal mills, so as to solve the technical problems mentioned in the background.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a slag discharge device for reducing the impact of dust from coal mill slag discharge, comprising a coal mill body, wherein a dust suppression component for spraying water onto the slag is installed at the discharge port of the coal mill body.

[0007] The dust suppression assembly includes a frame fixed to the discharge port of the coal mill body. A feed inlet is provided at the discharge port. The inner wall of the frame is staggered with baffles to extend the residence time of the slag. Water spray grilles are installed in the upper and lower spaces between two adjacent sets of baffles. A U-tube connected to the two sets of water spray grilles is installed on the outer wall of the frame. Multiple atomizing nozzles are connected to the lower half of the outer wall of the U-tube. A water tank for supplying water to the U-tube is located at the top of the frame. Each baffle includes an outer frame fixed at one end to the inner wall of the frame, and an inner plate slidably disposed at the other end of the outer frame. Driven plates connected to the front and rear ends of the inner plate are embedded in the front and rear surfaces of the frame. A U-arm is mounted on the side of the frame away from the coal mill body, with both ends extending to the front and rear surfaces of the frame and fixed to the outer wall of the drive motor.

[0008] As a preferred technical solution, a drive motor is installed on the left outer wall of the frame, and an eccentric disk for driving the U-arm to lift is provided at the output end of the drive motor. A base plate for supporting the drive motor is welded to the outer wall of the frame.

[0009] As a preferred technical solution, the inner wall of the U-arm is fixed with two sets of sliders, and the left outer wall of the frame is provided with a slider groove that matches the two sets of sliders.

[0010] As a preferred technical solution, the water tank is equipped with a water pump connected to the U-tube, and the top of the water tank is connected to a water injection hole.

[0011] As a preferred technical solution, the front and rear surfaces of the frame shell are provided with stroke grooves at the contact positions with the driven plate. The stroke grooves are provided with progressive grooves at the corresponding positions of the front and rear ends of each set of inner plates. The front and rear ends of the inner plates are fixed with positioning shafts. The positioning shafts pass through the progressive grooves and are slidably connected to the driven plate. The end contact position of the driven plate with the positioning shaft is provided with a long straight groove.

[0012] As a preferred technical solution, a T-shaped constraint disk is slidably provided in the long straight groove, and the T-shaped constraint disk is fixed to the end face of the positioning shaft.

[0013] As a preferred technical solution, the bottom of the frame shell is hollowed out, and an external conveyor belt is used to transport the slag material below the frame shell.

[0014] In summary, the present invention has the following main advantages:

[0015] This invention extends the residence time of slag during discharge by extending the dust suppression component, allowing sufficient time for the atomizing nozzle to perform dust suppression. At the same time, the gap between the baffle and the frame can be indirectly changed to prevent internal dust leakage, ensuring that the device can effectively suppress dust from the slag and thus protecting the health and safety of personnel around the device. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is an unfolded structural diagram of the dust suppression component of this utility model;

[0018] Figure 3 This is a cross-sectional view of the dust suppression component of this utility model;

[0019] Figure 4 This is a schematic diagram of the water tank and U-tube of this utility model;

[0020] Figure 5 This is a schematic diagram of the spoiler and driven plate structure of this utility model.

[0021] In the diagram: 100, coal mill body; 200, dust suppression components;

[0022] 210. Frame; 211. Feed inlet; 212. Stroke groove; 213. Gradient groove; 220. Driven plate; 221. Long straight groove; 230. Drive motor; 240. Eccentric disc; 250. U-arm; 260. Water tank; 261. U-tube; 262. Spray grid; 263. Atomizing nozzle; 270. Positioning shaft; 280. Baffle; 281. Outer frame; 282. Inner plate. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0024] The embodiments of this utility model will be described below based on its overall structure.

[0025] A slag discharge device to reduce the impact of slag dust from coal mills, such as Figures 1 to 5 As shown, the device includes a coal mill body 100, and a dust suppression component 200 for spraying water onto the slag material is installed at the discharge port of the coal mill body 100.

[0026] The dust suppression assembly 200 includes a frame shell 210 fixed at the discharge port of the coal mill body 100. A feed inlet 211 is provided at the discharge port. The inner wall of the frame shell 210 is staggered with baffles 280 to extend the residence time of the slag. Water spray grilles 262 are installed in the upper and lower spaces of adjacent sets of baffles 280. A U-tube 261 connected to the two sets of water spray grilles 262 is installed on the outer wall of the frame shell 210. Multiple atomizing nozzles 263 are connected to the lower half of the outer wall of the U-tube 261. The top of 0 is provided with a water tank 260 for supplying water into the U-tube 261. The baffle 280 includes an outer frame 281 fixed at one end to the inner wall of the frame shell 210, and an inner plate 282 slidably provided at the other end of the outer frame 281. The front and rear surfaces of the frame shell 210 are inlaid with driven plates 220 connected to the front and rear ends of the inner plate 282. A U-arm 250 is assembled on the side of the frame shell 210 away from the coal mill body 100. The two ends of the U-arm 250 extend to the front and rear surfaces of the frame shell 210 and are fixed to the outer wall of the drive motor 230.

[0027] A drive motor 230 is installed on the left outer wall of the frame 210. The output end of the drive motor 230 is provided with an eccentric disk 240 for driving the U-arm 250 to lift. A base plate supporting the drive motor 230 is welded to the outer wall of the frame 210.

[0028] The front and rear surfaces of the frame 210 are provided with travel grooves 212 at the contact positions with the driven plate 220. The travel grooves 212 and the corresponding front and rear ends of each set of inner plates 282 are provided with progressive grooves 213. The front and rear ends of the inner plates 282 are fixed with positioning shafts 270. The positioning shafts 270 pass through the progressive grooves 213 and are slidably connected with the driven plate 220. The end contact positions of the driven plate 220 and the positioning shafts 270 are provided with long straight grooves 221.

[0029] The slag discharged from the coal mill body 100 enters the frame shell 210 through the feed inlet 211. Due to its own weight, it falls and comes into contact with the baffle 280. At this time, the drive motor 230 also starts to work and drives the eccentric disk 240 to rotate, causing the U-arm 250 to slide upward on the outer wall of the frame shell 210. Under the traction of the U-arm 250, the driven plates 220 on both inner sides will rise linearly in the stroke groove 212, and drive the inner plate through the positioning shaft 270. 282 moves synchronously. Due to the factor of the gradually rising groove 213, the positioning shaft 270 will tilt and rise along the gradually rising groove 213. The long straight groove 221 opened by the driven plate 220 allows the positioning shaft 270 to move laterally when tilting and rising. Finally, the inner plate 282 can tilt and rise synchronously and retract into the outer frame 281, making the gap between the end face of the inner plate 282 and the inner wall of the frame shell 210 larger, which allows the slag material on the upper surface of the baffle 280 to slide and fall off quickly.

[0030] Since the eccentric disk 240 rotates continuously and in one direction, when the U-arm 250 is no longer squeezed upward by the eccentric disk 240, it will lower and recover under its own weight. Therefore, the inner plate 282 will also extend out of the outer frame 281, making the gap between the end of the inner plate 282 and the frame shell 210 smaller. This extends the retention time of the slag at the top of the baffle 280. At this time, the water inside the water tank 260 enters the U-pipe 261 and is transported to the water spray grid 262 and discharged through the atomizing nozzle 263 to perform dust suppression treatment on the slag discharge. The staggered baffles 280 prevent the dust inside the frame shell 210 from easily leaking out, allowing for thorough dust suppression treatment in the frame shell 210.

[0031] Please refer to this carefully. Figure 2 and Figure 3 Two sets of sliders are fixed on the inner wall of the U-arm 250, and a slider groove that matches the two sets of sliders is opened on the left outer wall of the frame 210.

[0032] The path of the U-arm 250 for vertical movement is constrained so that it can move horizontally and drive the two sets of driven plates 220 to perform reciprocating lifting and lowering actions.

[0033] Please refer to this carefully. Figure 2 and Figure 3 The water tank 260 is equipped with a water pump connected to the U-pipe 261, and the top of the water tank 260 is connected to a water injection hole.

[0034] By using a water pump to deliver water into the U-tube 261 and generate a certain water pressure, and by adding water to the water tank 260 through the water injection hole, the atomizing nozzle 263 can be guaranteed to perform dust suppression in real time.

[0035] Please refer to this carefully. Figure 5 A T-shaped constraint disk is slidably provided in the long straight groove 221, and the T-shaped constraint disk is fixed to the end face of the positioning shaft 270.

[0036] The T-shaped constraint plate is used to lock the positioning shaft 270, ensuring that the end face of the positioning shaft 270 is always in contact with the driven plate 220 for horizontal movement.

[0037] Please refer to this carefully. Figure 3 The bottom of the frame shell 210 is hollow, and the slag material is transported by an external conveyor belt below the frame shell 210.

[0038] The slag after dust suppression is discharged from the bottom of the frame 210 and can be quickly moved to the destination by the conveyor belt (which is implemented using the prior art in the prior art document, and subsequent operations such as water control can be performed).

[0039] During operation, the slag discharged from the coal mill body 100 enters the frame shell 210 through the feed inlet 211. Due to its own weight, it falls and contacts the baffle 280. At this time, the drive motor 230 also starts to work and drives the eccentric disk 240 to rotate, causing the U-arm 250 to slide upward on the outer wall of the frame shell 210. Under the traction of the U-arm 250, the driven plates 220 on both inner sides will rise linearly in the stroke groove 212 and be driven by the positioning shaft 270. The inner plate 282 moves synchronously. Due to the gradual rise groove 213, the positioning shaft 270 will tilt and rise along the gradual rise groove 213. The long straight groove 221 opened in the driven plate 220 allows the positioning shaft 270 to move laterally when tilting and rising. Ultimately, the inner plate 282 can tilt and rise synchronously and retract into the outer frame 281, making the gap between the end face of the inner plate 282 and the inner wall of the frame shell 210 larger, which allows the slag on the upper surface of the baffle 280 to slide and fall off quickly.

[0040] Since the eccentric disk 240 rotates continuously and in one direction, when the U-arm 250 is no longer squeezed upward by the eccentric disk 240, it will lower and recover under its own weight. Therefore, the inner plate 282 will also extend out of the outer frame 281, making the gap between the end of the inner plate 282 and the frame shell 210 smaller, thus extending the retention time of the slag at the top of the baffle 280. At this time, the water inside the water tank 260 enters the U-tube 261 and is transported to the water spray grid 262 and discharged through the atomizing nozzle 263 to perform dust suppression treatment on the slag discharge. The staggered baffles 280 prevent the dust inside the frame shell 210 from easily leaking out, and can perform thorough dust suppression treatment in the frame shell 210. The parts not mentioned in this device are the same as or can be implemented using existing technology.

[0041] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A slag discharge device for reducing the impact of slag and dust emissions from a coal mill, comprising a coal mill body (100), characterized in that: The discharge port of the coal mill body (100) is equipped with a dust suppression component (200) for spraying water onto the slag. The dust suppression assembly (200) includes a frame shell (210) fixed at the discharge port of the coal mill body (100). The frame shell (210) and the discharge port have an inlet (211). The inner wall of the frame shell (210) is staggered with baffles (280) to extend the residence time of the slag. Water spray grilles (262) are installed in the upper and lower spaces between two adjacent sets of baffles (280). The outer wall of the frame shell (210) is fitted with a U-tube (261) connected to the two sets of water spray grilles (262). The lower half of the outer wall of the U-tube (261) is connected to multiple sets of atomizing nozzles (263). The frame shell (210)... The top of the U-tube (261) is provided with a water tank (260) for supplying water to the U-tube (261). The baffle (280) includes an outer frame (281) with one end fixed to the inner wall of the frame (210). An inner plate (282) is slidably provided at the other end of the outer frame (281). A driven plate (220) connected to the front and rear ends of the inner plate (282) is embedded in the front and rear surfaces of the frame (210). A U-arm (250) is assembled on the side of the frame (210) away from the coal mill body (100). The two ends of the U-arm (250) extend to the front and rear surfaces of the frame (210) and are fixed to the outer wall of the drive motor (230).

2. The slag discharge device for reducing the impact of coal mill slag dust according to claim 1, characterized in that: A drive motor (230) is installed on the left outer wall of the frame (210). The output end of the drive motor (230) is provided with an eccentric disk (240) for driving the U-arm (250) to rise and fall. A base plate supporting the drive motor (230) is welded to the outer wall of the frame (210).

3. The slag discharge device for reducing the impact of coal mill slag dust according to claim 1, characterized in that: Two sets of sliders are fixed to the inner wall of the U-arm (250), and a slider groove that matches the two sets of sliders is opened on the left outer wall of the frame (210).

4. The slag discharge device for reducing the impact of coal mill slag dust according to claim 1, characterized in that: The water tank (260) is equipped with a water pump connected to the U-tube (261), and the top of the water tank (260) is connected to a water injection hole.

5. The slag discharge device for reducing the impact of coal mill slag dust according to claim 1, characterized in that: The front and rear surfaces of the frame (210) are provided with travel grooves (212) at the contact positions with the driven plate (220). The travel grooves (212) are provided with progressive grooves (213) at the corresponding positions of the front and rear ends of each set of inner plates (282). The front and rear ends of the inner plates (282) are fixed with positioning shafts (270). The positioning shafts (270) pass through the progressive grooves (213) and are slidably connected with the driven plate (220). The end contact position of the driven plate (220) and the positioning shaft (270) is provided with a long straight groove (221).

6. The slag discharge device for reducing the impact of coal mill slag dust according to claim 5, characterized in that: A T-shaped constraint disk is slidably provided in the long straight groove (221), and the T-shaped constraint disk is fixed to the end face of the positioning shaft (270).

7. The slag discharge device for reducing the impact of coal mill slag dust according to claim 1, characterized in that: The bottom of the frame (210) is hollow, and the slag is transported by an external conveyor belt below the frame (210).

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