Waste discharging device suitable for blast furnace coal mill
By designing a waste discharge device for blast furnace coal mills, the combination of square sealing cylinders and front sealing plates and high-pressure nitrogen injection, the problem of external air influx into coal mills is solved, ensuring the normal operation of the system and the improvement of production quality.
Patent Information
- Application Number
- CN202421145897.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-24
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2034-05-24
AI Technical Summary
During the waste discharge process of blast furnace coal mills, external air is prone to pour into the inside of the coal mills, resulting in excess of the oxygen content and affecting production quality and progress.
A waste discharge device including a square sealing cylinder, a front sealing plate, a cover opening mechanism, a discharge part and an inflatable part is designed. The sealing cavity is provided by a combination of a square sealing cylinder and a front sealing plate, and high pressure nitrogen is injected into the cavity to ensure that the influx of gas when the cover is opened is nitrogen rather than air.
It effectively avoids external air entering the coal mill, ensures the normal operation of the coal mill system, avoids the problem of excessive oxygen content, and improves production quality and progress.
Smart Images
Figure CN222624800U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a waste discharge device, in particular to a device that can ensure the reliability and safety of waste discharge of a blast furnace coal mill and prevent external air from flowing into the coal mill as a discharge port is opened to affect the operation of the coal mill, belonging to the technical field of coal mill waste discharge equipment. Background Art
[0002] The medium-speed coal mill for pulverizing blast furnace is an extremely important equipment in the coal injection system of blast furnace. Its function is to continuously prepare coal powder through the coal mill and inject it into the blast furnace through the injection system. In the process of coal powder production in the mill, due to the humidity of the raw coal, the grindability coefficient, hanging materials, debris and stones, etc., the pressure difference before and after the mill will suddenly increase or decrease, which can easily make the system unstable and cause coal discharge from the waste outlet of the mill. If the waste outlet of the mill is not checked regularly and at a fixed point, the high-temperature waste coal discharged from the mill will accumulate. In the waste outlet, spontaneous combustion occurs; in normal production, in order to prevent the waste from catching fire, the waste outlet needs to be manually opened frequently at regular intervals to discharge the waste; during frequent inspections, outside air will flow into the mill, causing the oxygen content of the entire coal grinding system to exceed the standard, seriously affecting the production quality and progress of the coal grinding mill; therefore, a waste discharge device is needed, which is required to prevent air from flowing into the mill when the waste outlet is opened to discharge, thereby ensuring the normal operation of the coal grinding mill system. Utility Model Content
[0003] The utility model aims to overcome the deficiencies of the prior art and provide a waste discharge device suitable for a blast furnace coal mill, which can effectively prevent outside air from entering the coal mill when the waste is discharged, thereby ensuring the smooth production of the coal mill.
[0004] The problem described in the utility model is solved by the following technical solutions:
[0005] A waste discharge device suitable for a blast furnace coal mill comprises a square sealing cylinder, a front sealing plate, a cover opening mechanism, a discharge part and an inflation part; the square sealing cylinder is arranged at the periphery of a waste discharge port of the coal mill, and one end of the square sealing cylinder away from the waste discharge port is open, and the front sealing plate is fitted on the open part; a square hole is arranged on the front sealing plate, and a visual glass is inlaid in the square hole; the discharge part is arranged at the bottom end of the square sealing cylinder; and the inflation part is arranged between the side walls on both sides of the square sealing cylinder.
[0006] The above-mentioned waste discharge device suitable for blast furnace coal mill, the cover opening mechanism includes a hydraulic cylinder, an upper hinged seat and a lower hinged seat; the upper hinged seat is arranged on the top end surface of the inner wall of the square sealing cylinder; the lower hinged seat is arranged on the outer wall of the flip cover of the coal mill waste discharge port; the shell of the hydraulic cylinder and the upper hinged seat constitute an articulated matching connection structure, and the end of the hydraulic cylinder piston rod and the lower articulated seat constitute an articulated matching connection structure.
[0007] The above-mentioned waste discharge device suitable for blast furnace coal mill, the unloading part includes a sealing slide plate, a handle, a limit rod and a limit plate; the bottom end face of the square sealing cylinder is provided with a square through hole along the vertical direction; the end face of the bottom side wall of the square sealing cylinder away from the waste discharge port is provided with a strip hole, and the sealing slide plate passes through the strip hole at the bottom end of the square sealing cylinder and is inserted into the square through hole of the square sealing cylinder; the two side walls of the sealing slide plate are respectively in contact with the two sides of the inner wall of the square through hole on the bottom end face of the square sealing cylinder; the limit rod is arranged on the end face of the bottom side wall of the square sealing cylinder away from the waste discharge port, and the limit plate is axially connected to the end face of the limit rod away from the waste discharge port, and the limit plate is in contact with the end face of the sealing slide plate away from the waste discharge port; the end face of the sealing slide plate away from the waste discharge port is provided with a handle.
[0008] The above-mentioned waste discharge device suitable for blast furnace coal mill, the inflation part includes a long air pipe, a limit block, an air inlet and a circular ring; sealing holes are arranged on the side walls of both sides of the square sealing cylinder, and the long air pipe passes through the sealing holes on both sides; a limit block is arranged at one end of the long air pipe, and a handle is arranged at the other end, and the handle and the limit block are both located outside the square sealing cylinder; an air inlet is arranged at one end of the side wall of the long air pipe, and the air inlet is connected to a high-pressure nitrogen source through a hose; the circular ring is arranged on the side wall of the long air pipe, and the circular ring is located inside the square sealing cylinder; the interior of the circular ring is a cavity structure, and the interior of the circular ring is connected with the interior of the long air pipe; a nozzle is arranged on the circumferential outer wall of the circular ring; the circular ring is located directly above one end of the inner wall of the square through hole of the square sealing cylinder close to the waste discharge port.
[0009] The waste discharge device suitable for blast furnace coal mill is additionally provided with a discharge hopper, and the discharge hopper is arranged at the bottom end of the square sealing cylinder, the upper end opening of the discharge hopper is large, and the lower end opening is small.
[0010] The utility model provides a sealed cavity structure outside the waste discharge port through the combination of a square sealing cylinder and a front sealing plate, and ensures that what flows into the coal mill when the cover is opened is nitrogen instead of air by filling the interior of the cavity structure; the purpose of opening and closing the flip cover of the waste discharge port is achieved through the cover opening mechanism; the purpose of waste unloading is achieved through the unloading part; the high-pressure nitrogen is injected into the sealed cavity through the inflation part on the one hand, and the inner wall of the square through hole of the square sealing cylinder is cleaned on the other hand, so as to ensure that the sealing slide plate can slide into place and ensure the sealing performance of the sealed cavity. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;
[0012] Figure 2 It is a schematic diagram of the three-dimensional structure of the utility model after removing the front sealing plate.
[0013] The list of numbers in the figure is: 1. square sealing cylinder, 2. front sealing plate, 3. hydraulic cylinder, 4. sealing slide plate, 5. limit plate, 6. long air pipe, 7. circular ring, 8. discharge hopper. DETAILED DESCRIPTION
[0014] See also Figure 1 and Figure 2 The utility model comprises a square sealing cylinder 1, a front sealing plate 2, an opening mechanism, a discharge part and an inflation part; the square sealing cylinder 1 is arranged at the periphery of the waste outlet of the coal mill, and the end of the square sealing cylinder 1 away from the waste outlet is open, and the front sealing plate 2 is fitted at the open part; the combination of the square sealing cylinder 1 and the front sealing plate 2 provides a sealed cavity environment for the peripheral environment of the waste outlet, and high-pressure nitrogen is injected into the cavity environment, and the high-pressure nitrogen provides a nitrogen environment for the waste outlet. When the flip cover of the waste outlet is opened, what flows into the coal mill is no longer the outside air, but the high-pressure nitrogen; a square hole is arranged on the front sealing plate 2, and a visual glass is inlaid in the square hole; the situation in the sealed cavity composed of the square sealing cylinder 1 and the front sealing plate 2 can be observed through the visual glass, so that the staff can judge the next operation; the discharging part is arranged at the bottom end of the square sealing cylinder 1; the inflation part is arranged between the side walls on both sides of the square sealing cylinder 1.
[0015] The cover opening mechanism includes a hydraulic cylinder 3, an upper hinge seat and a lower hinge seat; the upper hinge seat is arranged on the top end surface of the inner wall of the square sealing cylinder 1; the lower hinge seat is arranged on the outer wall of the flip cover of the coal mill waste discharge port; the shell of the hydraulic cylinder 3 and the upper hinge seat constitute an articulated matching connection structure, and the end of the piston rod of the hydraulic cylinder 3 and the lower hinge seat constitute an articulated matching connection structure; when the hydraulic cylinder 3 retracts the piston rod, the flip cover at the waste discharge port is opened, and the waste accumulated inside naturally falls and is discharged; when the hydraulic cylinder 3 extends the piston rod, the flip cover is pushed back to its original position and the waste discharge port is re-closed.
[0016] The unloading part includes a sealing slide plate 4, a limiting rod and a limiting plate 5; the bottom end surface of the square sealing cylinder 1 is provided with a square through hole in the vertical direction, and the square through hole is used for passing waste; the bottom side wall of the square sealing cylinder 1 is provided with a strip hole on the end surface away from the waste discharge port, and the strip hole is connected to the square through hole, so the sealing slide plate 4 can pass through the strip hole and the square through hole in sequence; the sealing slide plate 4 passes through the strip hole at the bottom end of the square sealing cylinder 1 and is inserted into the square through hole of the square sealing cylinder 1; the opening and closing of the square through hole is realized by sliding the sealing slide plate 4, when the sealing slide plate 4 blocks the square through hole, the waste accumulates on the sealing slide plate 4, when the sealing slide plate 4 slides away from the square through hole, the channel of the square through hole is opened, and the accumulated waste can fall from the channel of the square through hole; The two side walls of the sealing slide 4 are respectively in contact with the two sides of the inner walls of the square through hole on the bottom end face of the square sealing cylinder 1; the limiting rod is arranged on the end face of the bottom side wall of the square sealing cylinder 1 away from the waste discharge port, and the limiting plate 5 is axially connected to the end face of the limiting rod away from the waste discharge port, and the limiting plate 5 is in contact with the end face of the sealing slide 4 away from the waste discharge port; the limiting plate 5 can rotate on the limiting rod, and then adjust the state so that it limits or releases the sealing slide 4. When the limiting plate 5 touches and presses on the tail of the sealing slide 4, the sealing slide 4 cannot slide, thereby limiting the passage of the square through hole; when the limiting plate 5 is rotated so that it does not contact the sealing slide 4, the sealing slide 4 can slide; a handle is arranged on the end face of the sealing slide 4 away from the waste discharge port, and the staff holds the handle to control the sealing slide 4 to slide.
[0017] The inflation part includes a long air tube 6, a limit block, an air inlet and a circular ring 7; sealing holes are provided on both side walls of the square sealing tube 1, and the long air tube 6 passes through the sealing holes on both sides; the long air tube 6 contains high-pressure nitrogen; a limit block is provided at one end of the long air tube 6, and a handle is provided at the other end, and the handle and the limit block are both located outside the square sealing tube 1; the long air tube 6 is driven to slide by the handle at the end of the long air tube 6; an air inlet is provided at one end of the side wall of the long air tube 6, and the air inlet is connected to a high-pressure nitrogen source through a hose; the high-pressure nitrogen source injects high-pressure nitrogen into the long air tube 6; the circular ring 7 is provided on the side wall of the long air tube 6, and the circular ring 7 is located inside the square sealing tube 1; the interior of the circular ring 7 is a cavity structure, and the interior of the circular ring 7 It is connected to the interior of the long air pipe 6; the long air pipe 6 provides high-pressure nitrogen to the circular ring 7, which is finally ejected from the nozzle on the circular ring 7; a nozzle is arranged on the circumferential outer wall of the circular ring 7; the circular ring 7 is located directly above the end of the inner wall of the square through hole of the square sealing cylinder 1 close to the waste outlet; since the front end of the sealing slide plate 4 needs to support and fit the end of the inner wall of the square through hole close to the waste outlet, the sealing of the sealing cavity composed of the square sealing cylinder 1 and the front sealing plate 2 is achieved; if there is residual waste material on the end of the inner wall of the square through hole close to the waste outlet, the sealing ring 4 will not slide into place and affect the sealing performance. Therefore, the existence of the circular ring 7 is used to purge the inner wall of the square through hole close to the waste outlet to ensure that the sealing slide plate 4 can slide into place smoothly to achieve sealing.
[0018] A discharge hopper 8 is added, and the discharge hopper 8 is arranged at the bottom end of the square sealing cylinder 1. The upper end opening of the discharge hopper 8 is large, and the lower end opening is small; the discharge hopper 8 allows the waste to fall into the waste cart below during the falling process, avoiding the waste from falling everywhere during the falling process.
[0019] Actual use process: in the initial state, the sealing slide plate 4 blocks the square through hole at the bottom end of the square sealing cylinder; when waste needs to be discharged, high-pressure nitrogen is injected into the cavity of the combination of the square sealing cylinder 1 and the front sealing plate 2 through the long air pipe 6 and the circular ring 7; then the hydraulic cylinder 3 is started to open the flap at the waste outlet, at this time, the waste is discharged and falls on the sealing slide plate 4, and the staff observes through the visual glass that after the waste is discharged, the hydraulic cylinder 3 drives the flap to reset and re-blocks the discharge outlet; then the limiting plate 5 is moved, the sealing slide plate 4 is pulled, the passage of the square through hole is opened, and the waste falls into the trolley below. After the waste is discharged, the long air pipe 6 is pushed to make the circular ring 7 move horizontally and purge the inner wall of the square through hole near the waste outlet, and the residual materials along the way are purged cleanly to ensure that the sealing slide plate 4 can slide into place for sealing. After purging, the nitrogen source valve is closed; then the sealing slide plate 4 is pushed to seal the square through hole, and then the limiting plate 5 is moved to limit the sealing slide plate 4; at this point, the waste discharge operation is completed.
Claims
1. A waste discharge device suitable for a blast furnace coal mill, characterized in that: The invention comprises a square sealing cylinder (1), a front sealing plate (2), a cover opening mechanism, a discharge part and an air filling part; the square sealing cylinder (1) is arranged at the periphery of the waste discharge port of the coal mill, and one end of the square sealing cylinder (1) away from the waste discharge port is open, and the front sealing plate (2) is fitted on the open part; a square hole is arranged on the front sealing plate (2), and a visual glass is embedded in the square hole; the discharge part is arranged at the bottom end of the square sealing cylinder (1); and the air filling part is arranged between the side walls on both sides of the square sealing cylinder (1).
2. The waste discharge device for blast furnace coal mill according to claim 1, characterized in that: The cover opening mechanism comprises a hydraulic cylinder (3), an upper hinge seat and a lower hinge seat; the upper hinge seat is arranged on the top end surface of the inner wall of the square sealing cylinder (1); the lower hinge seat is arranged on the outer wall of the flip cover of the coal mill waste discharge port; the shell of the hydraulic cylinder (3) and the upper hinge seat form an articulated matching connection structure, and the end of the piston rod of the hydraulic cylinder (3) and the lower hinge seat form an articulated matching connection structure.
3. The waste discharge device for blast furnace coal mill according to claim 2, characterized in that: The unloading part comprises a sealing slide plate (4), a limiting rod and a limiting plate (5); a square through hole is arranged on the bottom end surface of the square sealing cylinder (1) along the vertical direction; a strip hole is arranged on the end surface of the bottom side wall of the square sealing cylinder (1) away from the waste discharge port, and the sealing slide plate (4) passes through the strip hole at the bottom end of the square sealing cylinder (1) and is inserted into the square through hole of the square sealing cylinder (1); the two side walls of the sealing slide plate (4) are respectively in contact with the two sides of the inner wall of the square through hole on the bottom end surface of the square sealing cylinder (1); the limiting rod is arranged on the end surface of the bottom side wall of the square sealing cylinder (1) away from the waste discharge port, and the limiting plate (5) is axially connected to the end surface of the limiting rod away from the waste discharge port, and the limiting plate (5) is in contact with the end surface of the sealing slide plate (4) away from the waste discharge port; and a handle is arranged on the end surface of the sealing slide plate (4) away from the waste discharge port.
4. The waste discharge device for blast furnace coal mill according to claim 3, characterized in that: The inflatable part comprises a long air tube (6), a stopper, an air inlet and a circular ring (7); sealing holes are arranged on both side walls of the square sealing cylinder (1), and the long air tube (6) passes through the sealing holes on both sides; a stopper is arranged at one end of the long air tube (6), and a handle is arranged at the other end, and the handle and the stopper are both located outside the square sealing cylinder (1); an air inlet is arranged at one end of the side wall of the long air tube (6), and the air inlet is connected to a high-pressure nitrogen source through a hose; the circular ring (7) is arranged on the side wall of the long air tube (6), and the circular ring (7) is located inside the square sealing cylinder (1); the interior of the circular ring (7) is a cavity structure, and the interior of the circular ring (7) is connected to the interior of the long air tube (6); a nozzle is arranged on the circumferential outer wall of the circular ring (7); the circular ring (7) is located just above one end of the inner wall of the square through hole of the square sealing cylinder (1) close to the waste discharge port.
5. The waste discharge device for blast furnace coal mill according to claim 4, characterized in that: A discharge hopper (8) is additionally provided, and the discharge hopper (8) is arranged at the bottom end of the square sealing cylinder (1), and the upper end opening of the discharge hopper (8) is large, and the lower end opening is small.