Automatic large slag extrusion and crushing system of boiler

Abstract

This invention relates to an automated boiler slag crushing and extrusion system, comprising a shut-off gate mounted on a grid and a camera; a first spiral tube is spirally connected to the shut-off gate, and a universal flexible shaft is built into the first spiral tube; one end of the first spiral tube extends to the outside of the shut-off gate and is connected to a drill bit; the output end of the universal flexible shaft is connected to the drill bit; the first spiral tube is connected to an external cooling water source via a flexible water supply pipe; the first spiral tube has uniformly distributed first liquid outlet holes; when the camera detects that the slag block being crushed cannot be broken but instead deforms, the first spiral tube spirally rotates and inserts into the slag block; the drill bit drills a channel in the slag block for the insertion of the first spiral tube, facilitating the spiral insertion of the first spiral tube. After the first spiral tube is inserted into the slag block, external coolant is sprayed into the slag block through the first spiral tube, which improves cooling efficiency.

Description

Technical Field

[0001] This invention relates to the field of boiler ash removal technology, specifically to an automated boiler ash crushing and extrusion system. Background Technology

[0002] The basic principle of a dry slag removal system is to utilize the convective motion between ambient air and hot slag for heat exchange. This allows the hot slag to be cooled and discharged, while the cold air is heated and then enters the furnace under the negative pressure. For a dry slag removal system, the steel belt conveyor is a key component and the main load-bearing equipment. To prevent slag chunks falling from the furnace from directly landing on the steel belt of the dry slag conveyor, a grid is installed above the dry slag conveyor, at the outlet of the cold slag hopper. A hydraulically driven shut-off gate is installed on the grid; the main function of the shut-off gate is to isolate and compress the slag.

[0003] For example, the "dry slag discharge system" disclosed in patent publication number CN201561432U can crush large slag when the slag discharged from the boiler is too large, thus preventing large slag from falling onto the conveyor belt and damaging it.

[0004] However, in actual operation, when coking occurs inside the furnace, larger coke lumps fall onto the grid. After being observed by the camera, they need to be squeezed and broken up. However, due to the limited cooling air volume, the large coke lumps cannot be cooled and hardened. As a result, when squeezed with the shut-off door, the coke lumps are still soft and their shape changes, but they still cannot be broken into smaller pieces to fall onto the steel belt. At this point, even manual slag removal cannot solve the problem. If not handled in time, they will accumulate and accumulate more and more. In severe cases, the entire cold ash hopper will be full, and the furnace will have to be shut down for treatment.

[0005] Therefore, it is necessary to cool the larger slag blocks that fall onto the grid in the furnace to make the slag blocks harden quickly, and then crush them by squeezing through the extrusion head on the shut-off door.

[0006] For example, the patent publication number CN102580832B discloses "Isolation and Crushing Device and Method for Dry Slag Discharge Machine", which uses a crushing device, a water supply device and an isolation baffle to use a small flow rate and high pressure of cooling water to water-quench larger slag blocks falling on the grid in the furnace, so that the slag blocks harden quickly, and then crush them by squeezing through the extrusion head on the shut-off door.

[0007] However, in the existing technology, cooling water is sprayed onto the hot outer surface of the slag block. When the slag block is large, it is not easy to cool the inside, resulting in low cooling efficiency. At the same time, when the cold water comes into contact with the high temperature surface of the slag block, the water will evaporate rapidly to form a large amount of white mist, which will affect the visual recognition of the external camera. Summary of the Invention

[0008] To address the shortcomings of existing technologies, this invention provides an automated boiler slag crushing and extrusion system to solve the aforementioned problems.

[0009] This invention provides the following technical solution:

[0010] An automated boiler slag extrusion and crushing system includes a grid installed at the outlet of the cold slag hopper, a shut-off gate installed on the grid, and a camera aimed at the grid.

[0011] The shut-off door is spirally connected to a first spiral tube driven by a first power component, and the first spiral tube has a built-in universal flexible shaft; one end of the first spiral tube extends to the outside of the shut-off door and is connected to a drill bit.

[0012] The output end of the universal flexible shaft is connected to the drill bit, and the input end is driven by the second power component.

[0013] The first spiral tube is connected to an external cooling water source via a flexible water supply pipe; the first spiral tube has uniformly distributed first liquid outlet holes.

[0014] Preferably, the first power assembly includes an internal toothed groove formed inside the shut-off door, a first drive motor, and a drive gear installed at the output end of the first drive motor; a mounting plate is fixedly provided at one end of the first spiral tube, the first drive motor is mounted on the mounting plate, the drive gear meshes with the internal toothed groove, and the axis of the internal toothed groove is aligned with the axis of the first spiral tube.

[0015] Preferably, the second power component drive includes a second drive motor mounted on the mounting plate, and the output end of the second drive motor is connected to the input end of the universal flexible shaft.

[0016] Preferably, a matching second spiral tube is movably sleeved on the outer wall of the first spiral tube, and the second spiral tube has uniformly distributed second liquid outlet holes. The first spiral tube and the second spiral tube move relative to each other in a spiral motion so that the first liquid outlet hole and the second liquid outlet hole are aligned or staggered.

[0017] Preferably, the outer wall of the first spiral tube is provided with a limiting part, and the second spiral tube is located between the two sets of limiting parts.

[0018] Preferably, the outer wall of the movable bushing of the universal flexible shaft is provided with a rotation control sealing ring.

[0019] Preferably, the rotary control sealing ring includes a movable ring and a fixed ring, both of which have infusion channels. The fixed ring is fixed to the outer wall of the movable bushing, and the movable ring is rotatably connected to the fixed ring so that the infusion channels on the movable ring and the fixed ring are aligned or staggered.

[0020] Preferably, a thermal element is provided at the position of the fixed ring corresponding to the infusion channel. The thermal element closes the corresponding infusion channel when heated, and opens the corresponding infusion channel when cooled.

[0021] Preferably, the outer diameter of the drill bit is larger than the outer diameter of the first spiral tube and the second spiral tube.

[0022] Preferably, the shut-off door has a protrusion on the outer wall of the side where the first spiral tube spirals in and out.

[0023] The present invention has the following beneficial technical effects:

[0024] When the camera detects that the slag block is large, the present invention controls the hydraulic cylinder to drive the shut-off door, which crushes the large slag block.

[0025] When the camera detects that the squeezed slag cannot be broken but is deformed instead, it controls the first power unit to drive the first spiral tube to rotate and move to the outside of the shut-off door. During this process, the first spiral tube is spirally inserted into the slag. At the same time, the second power unit drives the drill bit to rotate, and the drill bit drills out a channel for the first spiral tube to be inserted into the slag, which is conducive to the spiral insertion of the first spiral tube.

[0026] After the first spiral tube is inserted into the slag block, the external coolant is sprayed into the slag block through the first spiral tube. Spraying coolant into the slag block helps to improve cooling efficiency.

[0027] Spraying coolant inside the slag block can reduce the amount of coolant used and also reduce the formation of white mist. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of the present invention;

[0029] Figure 2 This is a schematic diagram of the shut-off door structure of the present invention;

[0030] Figure 3 yes Figure 2 A magnified view of part A;

[0031] Figure 4 This is a schematic diagram of the first power component inside the shut-off door of the present invention;

[0032] Figure 5 This is a schematic diagram of the engagement between the internal tooth groove and the drive gear of the present invention;

[0033] Figure 6 This is a schematic diagram of the first and second helical tubes of the present invention in conjunction;

[0034] Figure 7This is a schematic diagram of the engagement of the movable bushing and the rotation control sealing ring of a portion of the universal flexible shaft of the present invention;

[0035] Figure 8 This is a schematic diagram of the first direction of the rotation control sealing ring of the present invention;

[0036] Figure 9 This is a schematic diagram of the second direction of the rotation control sealing ring of the present invention.

[0037] The attached figures are labeled as follows:

[0038] 1. Camera; 2. Grille; 3. Hydraulic cylinder; 4. Shut-off door; 41. Protrusion; 42. Internal tooth groove; 5. First spiral tube; 51. First outlet hole; 52. Mounting plate; 53. First drive motor; 54. Drive gear; 55. Limiting part; 6. Drill bit; 61. Second drive motor; 7. Rotation control sealing ring; 71. Movable ring; 72. Fixed ring; 73. Infusion channel; 74. Thermosensitive element; 8. Second spiral sleeve; 81. Second outlet hole. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] An automated boiler slag extrusion and crushing system, such as Figure 1-9 As shown:

[0041] The grid 2 is located at the outlet of the cold slag hopper. Several shut-off gates 4 are divided into two groups and symmetrically arranged on both sides of the top of the grid 2. The two symmetrical groups of shut-off gates 4 are driven to move closer or further apart by corresponding hydraulic cylinders 3. The camera 1 is aimed at the grid 2. The camera 1 is part of the visual recognition system and is used to capture the image of slag blocks on the grid 2.

[0042] The visual recognition system uses the PointNet deep learning model to capture video footage and analyze whether there is large slag on the top of the grid 2. In manual mode, it can output a large slag alarm signal, and in automatic mode, it can automatically interlock and shut off the slag extrusion head of the gate 4 to carry out the crushing action.

[0043] An internal toothed groove 42 is provided inside the shut-off door 4. An installation plate 52 is provided inside the internal toothed groove 42. A first drive motor 53, a second drive motor 61 and a planetary gear set are installed on the side wall of the installation plate 52. A drive gear 54 is installed at the output end of the first drive motor 53. The drive gear 54 is one of the planetary gear sets and meshes with the internal toothed groove 42.

[0044] The first spiral tube 5 is spirally engaged with the shut-off door 4; one end of the first spiral tube 5 extends to the inner tooth groove 42 and is connected to the mounting plate 52, and the other end extends to the outside of the shut-off door 4 and is rotatably connected to the drill bit 6; the first spiral tube 5 has a hollow interior design, and a universal flexible shaft is installed inside the first spiral tube 5. The output end of the universal flexible shaft is connected to the drill bit 6, and the input end of the universal flexible shaft is connected to the output end of the second drive motor 61; and the axis of the first spiral tube 5 is aligned with the axis of the inner tooth groove 42.

[0045] The outer wall of the first spiral tube 5 is uniformly provided with first liquid outlet holes 51. The interior of the first spiral tube 5 is connected to an external cooling water source through a soft water supply pipe. The outer wall of the first spiral tube 5 is provided with two limiting parts 55. The outer wall of the first spiral tube 5 located between the two limiting parts 55 is fitted with a second spiral sleeve 8. The outer wall of the second spiral sleeve 8 is uniformly provided with second liquid outlet holes 81. The inner contour of the second spiral sleeve 8 is adapted to the outer contour of the first spiral tube 5.

[0046] The outer wall of the movable bushing of the universal flexible shaft is provided with a rotation control sealing ring 7, and the movable bushing achieves a liquid seal fit with the inner wall of the first spiral tube 5 through the rotation control sealing ring 7.

[0047] The rotary control sealing ring 7 includes a movable ring 71 and a fixed ring 72. Both the movable ring 71 and the fixed ring 72 are provided with corresponding infusion channels 73. The fixed ring 72 is fixed to the outer wall of the movable bushing. The movable ring 72 is rotatably connected to the side wall of the coaxial fixed ring 71 and the rotation angle is limited. The outer edge of the movable ring 72 is provided with an elastic sealing layer to improve the sealing effect between it and the inner wall of the first spiral tube 5. A heat-sensitive element 74 is provided at the infusion channel 73 of the movable ring 71.

[0048] Example 1:

[0049] Under normal conditions, most of the first spiral tube 5 is hidden inside the inner cavity of the inner tooth groove 42 of the shut-off gate 4, and the drill bit 6 is attached to the side wall of the shut-off gate 4. When the camera 1 detects a large slag block on the top of the grid 2, the shut-off gate 4 is driven by the hydraulic cylinder 3. The two symmetrical shut-off gates 4 work together to crush the large slag block. During this process, the protrusion 41 on the side wall of the shut-off gate 4 can prevent the slag block from contacting the drill bit 6.

[0050] During the process of crushing a large slag block by the cooperation of two symmetrical shut-off gates 4, when the camera 1 detects that the slag block has undergone large deformation and cannot be crushed, the deformable slag block indicates that the texture is relatively soft, and the hydraulic cylinder 3 is controlled to stop driving.

[0051] At the same time, the first drive motor 53 is controlled to drive the drive gear 54 to rotate in the forward direction. The rotation of the gear 54, in cooperation with the relatively fixed inner tooth groove 42, pushes the gear 54 to rotate around the axis of the inner tooth groove 42, thereby realizing the rotation of the mounting plate 52. The rotation of the mounting plate 52 drives the first spiral tube 5 to rotate accordingly. The first spiral tube 5 rotates and moves to the outside of the shut-off door 4.

[0052] Meanwhile, the second drive motor 61 drives the drill bit 6 to rotate at the end of the first spiral tube 5 via a universal flexible shaft. The rotation of the drill bit 6 at the end of the first spiral tube 5 enables drilling of the slag block to provide a channel for the subsequent spiral insertion of the first spiral tube 5 into the slag block.

[0053] During this process, the drive gear 54 adapts to the relative movement along the axis of the internal tooth groove 42 / first spiral tube 5.

[0054] After the first spiral tube 5 is spirally inserted into the slag block, external cooling water is supplied to the first spiral tube 5 through a flexible water supply pipe and sprayed into the slag block through the first liquid outlet 51, thereby achieving the effect of spraying coolant into the slag block to improve the cooling effect. Afterwards, the first spiral tube 5 is rotated in the opposite direction to detach from the slag block and reset.

[0055] A gap is left between the inner cavity of the first spiral tube 5 and the universal flexible shaft to allow cooling water to flow.

[0056] Hydraulic cylinder 3 continues to push shut-off gate 4 to crush the water-cooled and hardened slag. The visual recognition system detects the crushing of the slag through camera 1 and controls hydraulic cylinder 3 to reset.

[0057] Example 2 includes all the contents of Example 1:

[0058] When the first drive motor 53 rotates in the forward direction, the second spiral sleeve 8 moves relative to the first spiral tube 5 under the action of external friction, causing the second spiral sleeve 8 to abut against one of the limiting parts 55. At this time, the second liquid outlet hole 81 on the second spiral sleeve 8 is misaligned with the first liquid outlet hole 51 on the first spiral tube 5, thereby closing the first liquid outlet hole 51 by the second spiral sleeve 8. Thus, during the process of the first spiral tube 5 being spirally inserted into the slag block, the coolant inside the first spiral tube 5 will not flow out, preventing the slag block from hardening due to water cooling, which would make drilling by the drill bit 6 more difficult.

[0059] After the first spiral tube 5 is spirally inserted into the slag block, the first drive motor 53 is controlled to rotate in the opposite direction. First, the second spiral sleeve 8 moves in the opposite direction relative to the first spiral tube 5 under the action of external friction, so that the second spiral sleeve 8 abuts against another limiting part 55. At this time, the second liquid outlet hole 81 on the second spiral sleeve 8 is aligned with the first liquid outlet hole 51 on the first spiral tube 5, so that the first liquid outlet hole 51 is in the open state. The coolant inside the first spiral tube 5 flows out through the first liquid outlet hole 51 and the second liquid outlet hole 81 to water cool the inside of the slag block. The slag block hardens when wetted.

[0060] The first spiral tube 5 rotates in the opposite direction to be extracted from inside the slag block.

[0061] Example 3 includes all the contents of Example 2:

[0062] As the first drive motor 53 rotates in the forward direction, causing the first spiral tube 5 to be spirally inserted into the slag block, the second drive motor 61 drives the universal flexible shaft to rotate in the forward direction. During this process, the movable ring 71 first rotates relative to the fixed ring 72 to the first limit position due to the friction between the movable ring 71 and the inner wall of the first spiral tube 5. At this time, the infusion channels 73 of the movable ring 71 and the fixed ring 72 are misaligned, so that the rotation control sealing ring is in a closed state. Thus, the rotation control sealing ring blocks the flow of external cooling water to the end of the first spiral tube 5, preventing the slag block from hardening due to the presence of cooling water at the end of the first spiral tube 5, which would make it inconvenient for the drill bit 6 to drill.

[0063] Before the first drive motor 53 rotates in the reverse direction to cause the first spiral tube 5 to be spirally drawn out of the slag block, the second drive motor 61 first drives the universal flexible shaft to rotate in the reverse direction. During this process, the movable ring 71 first rotates in the opposite direction to the fixed ring 72 to the second limit position through the friction between the movable ring 71 and the inner wall of the first spiral tube 5. At this time, the liquid delivery channels 73 of the movable ring 71 and the fixed ring 72 are connected one by one, so that the rotation control sealing ring is in the open state, and the external cooling water can flow freely in the first spiral tube 5.

[0064] Example 4 includes all the contents of Example 3:

[0065] Before the first spiral tube 5 is spirally inserted into the slag block when the first drive motor 53 rotates in the forward direction, the initial state of the thermal element 74 is in the closed state of the corresponding liquid delivery channel 73, which further blocks the flow of external cooling water to the end of the first spiral tube 5.

[0066] During the process of the first spiral tube 5 being spirally inserted into the slag block, due to the large amount of heat inside the slag block at this time, the heat-sensitive element 74 is deformed by heat and is in the state of opening the corresponding infusion channel 73.

[0067] After the external cooling water cools the inside of the slag block, the internal temperature of the slag block decreases, and the temperature of the heat-sensitive element 74 also decreases and returns to its original state, and it is in the closed one-to-one corresponding liquid delivery channel 73 state. This avoids the slag block from cooling and hardening, and the continued delivery of cooling water due to improper operation, which would cause the outflowing cold water to come into contact with the outer surface of other slag blocks, and the water would evaporate to form a large amount of white mist, affecting the visual recognition effect of the external camera.

[0068] The embodiments described above are merely illustrative of specific implementations of the present invention, and while the descriptions are detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. An automated boiler slag crushing and extrusion system, comprising a grid (2) installed at the outlet of the cold slag hopper, a shut-off gate (4) installed on the grid (2), and a camera (1) aligned with the grid (2), characterized in that: The shut-off door (4) is spirally connected to a first spiral tube (5) driven by a first power component. The first spiral tube (5) has a built-in universal flexible shaft. One end of the first spiral tube (5) extends to the outside of the shut-off door (4) and is connected to a drill bit (6). The output end of the universal flexible shaft is connected to the drill bit (6), and the input end is driven by the second power component; The first spiral tube (5) is connected to an external cooling water source through a flexible water supply pipe; the first spiral tube (5) is provided with uniformly distributed first liquid outlet holes (51); The outer wall of the first spiral tube (5) is movably fitted with a matching second spiral tube (8), and the second spiral tube (8) is provided with uniformly distributed second liquid outlet holes (81). The first spiral tube (5) and the second spiral tube (8) move in a spiral motion relative to each other so that the first liquid outlet hole (51) and the second liquid outlet hole (81) are aligned or staggered. The outer wall of the movable bushing of the universal flexible shaft is provided with a rotation control sealing ring (7). The rotary control sealing ring (7) includes a movable ring (71) and a fixed ring (72). Both the movable ring (71) and the fixed ring (72) are provided with infusion channels (73). The fixed ring (72) is fixed to the outer wall of the movable bushing. The movable ring (71) is rotatably connected to the fixed ring (72) so that the infusion channels (73) on the movable ring (71) and the fixed ring (72) are aligned or staggered. The fixed ring (72) is provided with a thermal element (74) at the position corresponding to the infusion channel (73). The thermal element (74) closes the corresponding infusion channel (73) when heated, and opens the corresponding infusion channel (73) when cooled.

2. The boiler automated slag extrusion and crushing system according to claim 1, characterized in that, The first power assembly includes an internal tooth groove (42) opened in the shut-off door (4), a first drive motor (53), and a drive gear (54) installed at the output end of the first drive motor (53); a mounting plate (52) is fixedly provided at one end of the first spiral tube (5), the first drive motor (53) is mounted on the mounting plate (52), the drive gear (54) meshes with the internal tooth groove (42), and the axis of the internal tooth groove (42) is aligned with the axis of the first spiral tube (5).

3. The boiler automated slag extrusion and crushing system according to claim 2, characterized in that, The second power assembly includes a second drive motor (61) mounted on a mounting plate (52), the output end of which is connected to the input end of a universal flexible shaft.

4. The boiler automated slag extrusion and crushing system according to claim 1, characterized in that, The outer wall of the first spiral tube (5) is provided with a limiting part (55), and the second spiral tube (8) is located between the two sets of limiting parts (55).

5. The boiler automated slag extrusion and crushing system according to claim 1, characterized in that, The outer diameter of the drill bit (6) is greater than the outer diameter of the first spiral tube (5) and the second spiral tube (8).

6. The boiler automated slag extrusion and crushing system according to claim 1, characterized in that, The shut-off door (4) is provided with a protrusion (41) on the outer wall of the spiral tube (5) on one side.

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