Automatic deslagging mechanism of blending combustion boiler

Abstract

The utility model discloses a blending combustion boiler automatic deslagging mechanism which comprises a bottom plate, a deslagging box is fixedly installed on the top of the bottom plate, a slag feeding frame is installed on the top of the deslagging box in a butt joint mode, a plurality of sets of bearing rods are fixedly installed in the deslagging box, and ash processing mechanisms are fixedly installed on the two sides of the deslagging box and located at the positions of the bearing rods. A slag discharging opening is formed in one side of the slag discharging box, an adjusting plate is slidably installed on the slag discharging box at the position of the slag discharging opening, and an ash outlet pipe is installed at the bottom of the slag discharging box in a butt joint mode. Cold air flow is guided into the slag discharging box through the flow guide pipe, slag blocks in the slag discharging process of the slag inlet frame are cooled, and the situation that iron wires and stainless steel bars which cannot be sorted in the slag blocks are discharged into a slag cooler in the later period, softened iron wires are recovered through cooling, and the iron wires are hung and blocked at an inlet of the slag cooler is avoided. And the rotating frame is driven to rotate through the rotating bearing. And the slag blocks in the slag falling opening are discharged in batches.

Description

Technical Field

[0001] This utility model belongs to the field of co-firing boiler technology, specifically relating to an automatic ash discharge mechanism for co-firing boilers. Background Technology

[0002] Co-firing technology is a process in which different types and properties of coal are blended in a certain proportion during coal combustion in a boiler to generate electricity. Its basic principle is to utilize the composition of different coal types, blending them according to requirements to ensure that the final coal meets or closely approximates the boiler's design coal requirements in terms of performance indicators, thereby achieving high boiler efficiency, sufficient output, and good environmental performance. The boiler's working process mainly includes the coal combustion process and the heat transfer process from the flame and flue gas to the water. In the coal combustion process, coal enters the furnace through the coal hopper and burns, releasing its chemical energy as heat, giving the flame and flue gas high temperatures. The ash generated from combustion is finally discharged from the ash outlet. In the heat transfer process from the flame and flue gas to the water, the high-temperature flame and flue gas transfer heat to the water through the boiler drum and heated surfaces. The water circulates within the boiler, absorbing heat and eventually being heated into steam for use. The flue gas, after releasing heat, is discharged through the chimney.

[0003] Domestic utility model patent application number 202420900685.4 discloses a boiler ash removal device, belonging to the technical field of boiler ash removal equipment. It includes an ash removal chamber and a discharge pipe located at the bottom of the ash removal chamber. A valve device is installed on the discharge pipe. The ash removal chamber has a transmission chamber and an ash removal chamber arranged from top to bottom. A feed hopper is located at the top of one side of the transmission chamber, and an ash removal port communicating with the ash removal chamber is located at the bottom of the other side of the transmission chamber. A auger rod device that rotatably connects to the feed hopper and the ash removal port is connected inside the transmission chamber. The ash removal chamber is divided into two ash removal chambers, a first ash removal chamber and a second ash removal chamber, by a partition. Two discharge pipes are provided. A screening plate is inclinedly installed on the top of the second ash removal chamber via a vibrator. This utility model, by providing a transmission chamber, allows the auger rod device to continuously discharge ash from the transmission chamber into the ash removal chamber. The ash removal chamber, with its inclined screening plate via a vibrator, allows for the screening of large particles in the ash. The two discharge pipes can meet the different ash processing needs of various users. The aforementioned utility model cannot handle the complex composition of impurities after co-firing solid waste, which are difficult to sort and have low melting points, such as glass and aluminum, which easily melt and clump together, causing problems with slag discharge. During boiler ignition and operation, uneven air distribution can easily cause coking, resulting in poor slag discharge and requiring frequent opening and closing of the gate valve. In addition, after co-firing solid waste, unsortable iron wires and stainless steel strips are heated at high temperatures in the furnace and enter the slag cooler inlet with the slag discharge. The softened iron wires are restored after cooling and become stuck and blocked at the slag cooler inlet, requiring the gate valve to be closed to clear the blockage. There are also problems such as slag spraying when the gate valve is closed and opened again. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides an automatic ash discharge mechanism for a co-fired boiler, including a base plate, an ash discharge box fixedly installed on the top of the base plate, an ash inlet frame connected to the top of the ash discharge box, multiple sets of bearing rods fixedly installed inside the ash discharge box, and ash and slag treatment mechanisms fixedly installed on both sides of the ash discharge box at the positions of the bearing rods. An ash discharge port is opened on one side of the ash discharge box, and an adjusting plate is slidably installed on the ash discharge box at the position of the ash discharge port. An ash outlet pipe is connected to the bottom of the ash discharge box.

[0005] As a further preferred technical solution of this utility model; the bottom of the slag feeding frame is connected to the top of the slag discharge box, and a partition is welded and installed at the connection position between the bottom of the slag feeding frame and the slag discharge box. A set of guide ports are opened on the partition. A slag dropping port is extended and installed on the slag feeding frame on one side of the partition. A slag discharge channel penetrating the slag discharge box is opened inside the slag dropping port. A guide pipe is installed through one side of the slag feeding frame.

[0006] The slag blocks are discharged into the slag discharge box through the slag discharge port on the slag feed rack. During the slag discharge process, cold air is introduced into the slag discharge box through the guide pipe to cool the slag blocks during the slag discharge process.

[0007] As a further preferred technical solution of this utility model, a rotating frame is rotatably installed at the bottom of the partition plate, the rotating frame is rotatably connected to the bottom of the partition plate through a rotating bearing, multiple sets of guide inclined plates are fixedly installed on the rotating frame, and two sets of slag discharge sections are opened on the rotating frame to cooperate with the slag discharge channel for material discharge.

[0008] When cold air is introduced into the slag discharge box through the guide pipe, the airflow flows downward from the guide port, compressing the inclined surface of the guide plate on the rotating frame, causing the rotating frame to rotate through the rotating bearing. The slag in the slag discharge port is discharged in batches, and the rotation speed of the rotating frame can be controlled and adjusted according to the wind speed at the guide pipe to avoid continuous discharge and large amounts of slag clogging other structures inside the slag discharge box.

[0009] As a further preferred technical solution of this utility model, the ash and slag treatment mechanism includes a welded box welded to both sides of the slag discharge box, a hydraulic cylinder fixedly installed inside the welded box, and a slag crushing plate connected and installed at one end of the hydraulic cylinder through the inner wall of the slag discharge box.

[0010] The hydraulic cylinder is controlled by an electronic control system, which coordinates the rotation speed of the rotating frame caused by the wind speed with the material feeding time at the slag discharge port. The hydraulic cylinder simultaneously pushes the slag crushing plate to crush the large slag blocks on the support rod, preventing large slag blocks from accumulating on the support rod and causing blockage. At the same time, it ensures that external force is applied to some slag blocks with complex composition after co-firing solid waste that cannot be sorted, so as to avoid the slag discharge being obstructed.

[0011] As a further preferred technical solution of this utility model, connecting blocks are welded and installed at different heights on both sides of the inner wall of the slag discharge box. Screening plates are connected and installed on the connecting blocks. Double-layer screening screens are installed on the screening plates, and the screening screens are connected and installed by multiple sets of vibration springs. One end of the screening plate is installed at the slag discharge port.

[0012] The broken slag blocks, which are subjected to external force intervention, are screened again by a screening screen, causing the slag and ash on their surface to fall to the bottom of the slag discharge box. An exhaust structure is added to the end of the ash discharge pipe to extract the slag and ash inside the slag discharge box.

[0013] As a further preferred technical solution of this utility model; two sets of adjusting frames are welded and installed on one side of the slag discharge box; the adjusting plate and the slag discharge box are slidably installed through a sliding component fixedly installed on the slag discharge box; the sliding component is divided into a slider and a slide rail; the slide rail is installed on the slag discharge box; the slider is installed on the adjusting plate; positioning blocks are provided on both sides of the adjusting plate; the positioning blocks and the adjusting frame are fixedly installed through fixing bolts; the bottom of the slag discharge box is fixedly installed to the base plate through four sets of support rods.

[0014] If blockage or abnormal slag discharge occurs inside the slag discharge box, the adjusting plate can be slid to adjust the size of the slag discharge opening by removing the fixing bolts between the positioning block and the adjusting frame, thus preventing slag discharge blockage. The slag discharged from the slag discharge opening continues to be fed into the slag cooler for processing.

[0015] Beneficial effects

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] 1. Thermal power plants generate a large amount of slag during the co-firing of solid waste, which requires regular slag removal. This mechanism is installed at the slag discharge port of the co-firing boiler. The slag blocks are discharged into the slag discharge box through the slag discharge port on the slag feed rack. During the slag discharge process, cold air is introduced into the slag discharge box through the guide pipe to cool the slag blocks during the slag discharge process on the slag feed rack. This prevents unsortable iron wires and stainless steel strips in the slag blocks from being discharged into the slag cooler later. The cooling process restores the softened iron wires and prevents them from getting stuck and blocking the inlet of the slag cooler.

[0018] 2. When cold air is introduced into the slag discharge box through the guide pipe, the airflow flows downwards from the guide port, compressing the inclined surface of the guide plate on the rotating frame. According to Newton's third law, when the airflow rotates the frame, it exerts a force on the guide plate. Simultaneously, the guide plate exerts a reaction force on the airflow. Based on the design of the inclined surface on the guide plate, this reaction force drives the rotating frame to rotate via the rotating bearing. The slag in the slag discharge port is discharged in batches, and the rotation speed of the rotating frame can be controlled and adjusted according to the wind speed at the guide pipe to avoid continuous discharge and large amounts of slag clogging other structures inside the slag discharge box. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0021] Figure 3 This is a schematic cross-sectional view of the slag discharge channel of this utility model.

[0022] Figure 4 This is a schematic cross-sectional view of the sieve plate of this utility model.

[0023] In the diagram: 1. Base plate; 2. Slag discharge box; 21. Support rod; 22. Ash discharge pipe; 23. Slag inlet frame; 231. Guide pipe; 232. Partition plate; 233. Guide port; 234. Rotating frame; 235. Rotating bearing; 236. Guide inclined plate; 237. Slag discharge section; 238. Slag discharge channel; 239. Slag drop port; 24. Adjusting plate; 241. Positioning block; 25. Slag discharge port; 26. Adjusting frame; 27. Sliding component; 28. Connecting block; 29. ​​Bearing rod; 3. Ash and slag treatment mechanism; 31. Welding box; 32. Hydraulic cylinder; 33. Slag crushing plate; 4. Screening plate; 41. Screening mesh; 42. Vibration spring. Detailed Implementation

[0024] This specific embodiment is an automatic ash discharge mechanism for a co-firing boiler.

[0025] The aforementioned utility model cannot handle the complex composition of impurities after co-firing solid waste, which are difficult to sort and have low melting points, such as glass and aluminum, which easily melt and clump together, causing problems with slag discharge. During boiler ignition and operation, uneven air distribution can easily cause coking, resulting in poor slag discharge and requiring frequent opening and closing of the gate valve. In addition, after co-firing solid waste, unsortable iron wires and stainless steel strips are heated at high temperatures in the furnace and enter the slag cooler inlet with the slag discharge. The softened iron wires are restored after cooling and become stuck and blocked at the slag cooler inlet, requiring the gate valve to be closed to clear the blockage. There are also problems such as slag spraying when the gate valve is closed and opened again.

[0026] Its structural diagram is as follows Figures 1-4As shown. An automatic ash discharge mechanism for a co-fired boiler includes a base plate 1, a ash discharge box 2 fixedly installed on the top of the base plate 1, and an ash inlet frame 23 connected to the top of the ash discharge box 2. The bottom of the ash inlet frame 23 is connected to the top of the ash discharge box 2, and a partition plate 232 is welded and installed at the connection position between the bottom of the ash inlet frame 23 and the ash discharge box 2. A set of guide ports 233 are opened on the partition plate 232. A ash dropping port 239 extends from the ash inlet frame 23 on one side of the partition plate 232, and an ash discharge channel 238 penetrating the ash discharge box 2 is opened inside the ash dropping port 239. A guide pipe 231 is installed through one side of the ash inlet frame 23. During the co-firing of solid waste, thermal power plants generate a large amount of slag, which needs to be discharged regularly. This mechanism is installed at the slag discharge port of the co-firing boiler. The slag is discharged into the slag discharge box 2 through the slag discharge port 239 on the slag feed rack 23. During the slag discharge process, a cool airflow is introduced into the slag discharge box 2 through the guide pipe 231 to cool the slag during the slag discharge process on the slag feed rack 23. This prevents unsortable iron wires and stainless steel strips from being discharged into the slag cooler later, causing the softened iron wires to recover and become stuck and blocked at the inlet of the slag cooler. A rotating frame 234 is rotatably installed at the bottom of the partition plate 232. The rotating frame 234 is rotatably connected to the bottom of the partition plate 232 through a rotating bearing 235. Multiple sets of guide inclined plates 236 are fixedly installed on the rotating frame 234, and two sets of slag discharge sections 237 are opened on the rotating frame 234 to cooperate with the slag discharge channel 238 for material discharge. When cold air is introduced into the slag discharge box 2 through the guide pipe 231, the airflow flows downward through the guide port 233, compressing the inclined surface of the guide plate 236 on the rotating frame 234. According to Newton's third law, when the airflow rotates the frame 234, it will exert a force on the guide plate 236. At the same time, the guide plate 236 will exert a reaction force on the airflow. According to the design of the inclined surface on the guide plate 236, the reaction force will drive the rotating frame 234 to rotate through the rotating bearing 235. The slag blocks in the slag discharge port 239 are discharged in batches, and the rotation speed of the rotating frame 234 can be controlled and adjusted according to the wind speed at the guide pipe 231 to avoid continuous discharge and blockage of other structures inside the slag discharge box 2 by a large number of slag blocks. Multiple sets of bearing rods 29 are fixedly installed inside the slag discharge box 2, and ash and slag handling mechanisms 3 are fixedly installed on both sides of the slag discharge box 2 at the positions of the bearing rods 29. The ash and slag handling mechanism 3 includes welded boxes 31 welded to both sides of the slag discharge box 2, and hydraulic cylinders 32 fixedly installed inside the welded boxes 31. One end of the hydraulic cylinder 32 penetrates the inner wall of the slag discharge box 2 and is connected to a slag crushing plate 33. The hydraulic cylinder 32 is controlled by an electrical control system to coordinate with the rotation speed of the rotating frame 234 caused by the wind speed and the material discharge time of the slag discharge port 239. The hydraulic cylinder 32 simultaneously pushes the slag crushing plate 33 to crush large slag blocks on the bearing rod 29, preventing large slag blocks from accumulating on the bearing rod 29 and causing blockage. At the same time, it ensures that external force is applied to slag blocks with complex compositions after co-firing solid waste that cannot be sorted, thus preventing slag discharge from being obstructed.

[0027] A slag discharge port 25 is provided on one side of the slag discharge box 2, and an adjusting plate 24 is slidably installed on the slag discharge box 2 at the position of the slag discharge port 25. An ash discharge pipe 22 is connected to the bottom of the slag discharge box 2. Connecting blocks 28 are welded and installed at different heights on both sides of the inner wall of the slag discharge box 2. Screening plates 4 are connected and installed on the connecting blocks 28. Double-layer screening screens 41 are installed on the screening plates 4, and the screening screens 41 are connected and installed by multiple sets of vibration springs 42. One end of the screening plate 4 is installed at the position of the slag discharge port 25. The broken slag blocks that have been intervened by external force are screened again by the screening screens 41, so that the slag and ash on their surface fall to the bottom of the slag discharge box 2. An exhaust structure is added to the end of the ash discharge pipe 22 to extract the slag and ash inside the slag discharge box 2. Two sets of adjusting frames 26 are welded and installed on one side of the slag discharge box 2. The adjusting plate 24 and the slag discharge box 2 are slidably installed together via sliding parts 27 fixedly mounted on the slag discharge box 2. Positioning blocks 241 are provided on both sides of the adjusting plate 24. The positioning blocks 241 and the adjusting frames 26 are fixedly installed together by fixing bolts. The bottom of the slag discharge box 2 is fixedly installed to the bottom plate 1 by four sets of support rods 21. Once a blockage occurs inside the slag discharge box 2 or there is an abnormality in slag discharge, the fixing bolts between the positioning blocks 241 and the adjusting frames 26 are removed, and the adjusting plate 24 is slid to adjust the size of the slag discharge port 25 to avoid slag discharge blockage. The slag discharged from the slag discharge port 25 continues to be fed into the slag cooler for processing.

[0028] In the process of co-firing solid waste, thermal power plants generate a large amount of slag, which needs to be discharged regularly. This mechanism is set at the slag discharge port of the co-firing boiler. The slag is discharged into the slag discharge box 2 through the slag discharge port 239 on the slag feed rack 23. During the slag discharge process, cold air is introduced into the slag discharge box 2 through the guide pipe 231 to cool the slag during the slag discharge process of the slag feed rack 23. When the cold air is introduced into the slag discharge box 2 through the guide pipe 231, the air flows downward through the guide port 233 and squeezes the inclined surface of the guide plate 236 on the rotating frame 234, causing the rotating frame 234 to rotate through the rotating bearing 235. The hydraulic cylinder 32 is controlled by an electronic control system, coordinating with the rotation speed of the rotating frame 234 caused by the wind speed and the material discharge time of the slag discharge port 239. Simultaneously, the hydraulic cylinder 32 pushes the slag crushing plate 33 to crush the large slag blocks on the bearing rod 29. The crushed slag blocks, subjected to external force, are then screened again by the screening screen 41, causing the surface slag and ash to fall to the bottom of the slag discharge box 2. A ventilation structure is added to the end of the ash discharge pipe 22 to extract the slag and ash from inside the slag discharge box 2. Another portion of the screened slag blocks are discharged through the slag discharge port 25 and further fed into the slag cooler for processing.

[0029] All technical features in this embodiment can be freely combined according to actual needs.

[0030] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. An automatic slagging mechanism for a tangentially fired boiler, characterized in that, Includes a base plate (1), a slag discharge box (2) is fixedly installed on the top of the base plate (1), a slag inlet frame (23) is installed on the top of the slag discharge box (2), multiple sets of bearing rods (29) are fixedly installed inside the slag discharge box (2), and ash and slag treatment mechanisms (3) are fixedly installed on both sides of the slag discharge box (2) at the position of the bearing rods (29). A slag discharge port (25) is opened on one side of the slag discharge box (2), and an adjusting plate (24) is slidably installed on the slag discharge box (2) at the position of the slag discharge port (25). An ash discharge pipe (22) is installed at the bottom of the slag discharge box (2).

2. An automatic slagging mechanism for a tangentially fired boiler according to claim 1, characterized in that: The bottom of the slag feed frame (23) is connected to the top of the slag discharge box (2), and a partition plate (232) is welded and installed at the connection position between the bottom of the slag feed frame (23) and the slag discharge box (2). A set of guide ports (233) are opened on the partition plate (232). A slag discharge port (239) is extended on the slag feed frame (23) on one side of the partition plate (232), and a slag discharge channel (238) penetrating the slag discharge box (2) is opened inside the slag discharge port (239). A guide pipe (231) is installed through one side of the slag feed frame (23).

3. An automatic slagging mechanism for a tangentially fired boiler according to claim 2, characterized in that: A rotating frame (234) is rotatably mounted on the bottom of the partition (232). The rotating frame (234) is rotatably connected to the bottom of the partition (232) through a rotating bearing (235). Multiple sets of guide inclined plates (236) are fixedly mounted on the rotating frame (234), and two sets of slag discharge sections (237) are opened on the rotating frame (234) to cooperate with the slag discharge channel (238) for material discharge.

4. An automatic slagging mechanism for a tangentially fired boiler according to claim 1, characterized in that: The ash and slag treatment mechanism (3) includes a welding box (31) welded to both sides of the slag discharge box (2), a hydraulic cylinder (32) fixedly installed inside the welding box (31), and a slag block crushing plate (33) connected and installed at one end of the hydraulic cylinder (32) through the inner wall of the slag discharge box (2).

5. An automatic slagging mechanism for a tangentially fired boiler according to claim 1, characterized in that: The inner walls of the slag discharge box (2) are welded and installed with connecting blocks (28) at different heights on both sides. A screening plate (4) is installed on the connecting blocks (28). A double-layer screening screen (41) is installed on the screening plate (4), and the screening screens (41) are connected and installed by multiple sets of vibration springs (42). One end of the screening plate (4) is installed at the slag discharge port (25).

6. An automatic slagging mechanism for a tangentially fired boiler according to claim 1, characterized in that: Two sets of adjustment frames (26) are welded and installed on one side of the slag discharge box (2). The adjustment plate (24) and the slag discharge box (2) are slidably installed through a sliding component (27) fixedly installed on the slag discharge box (2). Positioning blocks (241) are provided on both sides of the adjustment plate (24). The positioning blocks (241) and the adjustment frame (26) are fixedly installed through fixing bolts. The bottom of the slag discharge box (2) is fixedly installed with the bottom plate (1) through four sets of support rods (21).

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