Novel tar residue coal blending device and method

Abstract

The invention relates to the technical field of tar residue coal blending, in particular to a novel tar residue coal blending device and a novel tar residue coal blending method. Comprising a stock bin, a spiral conveyor connected with a discharge port of the stock bin, a belt conveyor arranged below the discharge port of the spiral conveyor, a ball forming mill installed at a conveying terminal of the belt conveyor and an unloading unit installed on one side of the upper end of the stock bin, and the unloading unit, the stock bin and the spiral conveyor are all arranged in a workshop capable of being closed. The ball forming mill is arranged outside the workshop, the belt conveyor penetrates through the workshop, and the conveying starting end and the conveying terminal end of the belt conveyor are connected with the spiral conveyor and the ball forming mill respectively. By means of the coal blending device arranged in the workshop capable of being closed, whole-course closed conveying of tar dry residues from the residue box to the stock bin is achieved, the problem of dust raising pollution caused by traditional outdoor open space unloading is avoided, and compared with traditional dumper transportation, the transportation cost is reduced through forklift transfer and unloading in the closed workshop.

Description

Technical Field

[0001] This invention relates to the field of coal blending technology based on tar residue, and in particular to a novel coal blending device and method based on tar residue. Background Technology

[0002] Coking tar residue is a viscous, easily agglomerated waste residue produced during coking production. Its main components include coke powder, coal dust, coal tar, and bitumen. Traditionally, coal chemical enterprises typically transport the tar residue to coal yards for storage or sell it at low prices as fuel. However, this method severely pollutes the environment and wastes resources. However, tar residue has a high carbon content and low ash content. When coal powder and coking waste tar residue are thoroughly mixed with blended coal for coking, coke yield and gas production can be increased without affecting coke quality. This not only reuses coking waste but also reduces waste residue treatment costs and environmental governance pressure. Furthermore, the quality of the coke is not reduced. Therefore, using separated tar residue for coal blending allows for full resource reuse and reduces pollution.

[0003] Currently, tar residue for coal blending typically involves separating the residue from a mechanized tar-ammonia clarification tank, then transporting it in dump trucks to the tar residue blending section, where it is fed onto a coal conveyor. However, this method is inconvenient for dumping the residue and is unsuitable for small-scale relocation. Due to the limitations of the dump truck's tipping height and large size, this process requires outdoor open spaces, leading to dust problems. Furthermore, the large carrying capacity of dump trucks and the significant impact of dumping dry residue can damage equipment if dumped directly onto the coal blending conveyor section. Dumping it on-site not only occupies space but also incurs secondary transfer costs, increasing the overall cost of coal blending.

[0004] Therefore, to address the above issues, a tilting unloading coal blending device can be designed. This device allows for mechanical tilting unloading and coal blending within a closed workshop via forklift transport, improving mechanical utilization and transportation efficiency, and reducing the transportation costs and dust control difficulties associated with dry slag reuse coal blending. Summary of the Invention

[0005] To overcome the problems of high cost, low efficiency of relocation, and dust pollution in outdoor open spaces caused by large dump trucks transporting tar residue and coal.

[0006] The technical solution of this invention is as follows: a novel tar residue coal blending device, comprising a silo, a screw conveyor connected to the silo outlet, a belt conveyor located below the screw conveyor outlet, a pelletizing machine installed at the conveying end of the belt conveyor, and an unloading unit installed on one side of the upper end of the silo. The unloading unit, silo, and screw conveyor are all located within a secluded workshop, while the pelletizing machine is located outside the workshop. The belt conveyor passes through the workshop, with its starting and ending points connected to the screw conveyor and pelletizing machine, respectively. After a forklift enters the workshop, it only needs to lift the tar bin and place it on the unloading unit. After the forklift leaves the workshop, the operator operates the control system located in the workshop's safe area to pour the dry tar residue (particle size <3mm, moisture content <15%) from the tar bin into the silo, which is then conveyed to the pelletizing machine by the conveying equipment. The conveying process does not generate dust, so the conveying end can pass through the workshop and be placed outside. The pelletizing machine mixes the dry residue and coking coal, compresses it into pellets, and reuses them in coking. A pelletizing machine is an existing device that produces spherical particles from powdery or granular materials through physical or mechanical action. Its working principle can be simply summarized as follows: dry slag and coking coal are fed into an inclined rotating disc inside the pelletizing machine. Under the combined action of centrifugal force, friction, and gravity, they roll along the inner wall of the disc. After being moistened by pre-adding water or a binder, the materials gradually agglomerate into mother balls. During the rolling process, they continuously collide and squeeze, eventually forming spherical particles. Qualified particles overflow from the edge of the disc, while substandard particles are screened and returned for further processing.

[0007] The unloading unit includes a frame fixedly installed on one side of the upper end of the silo, a tipping wheel frame rotatably connected to the frame, and a drive module installed on the frame. The tipping wheel frame has a loading port, into which the slag box can be placed (the loading port can be designed to match the size of the slag box, generally a rectangular structure for easy forklift transport). The output end of the drive module is connected to the input end of the tipping wheel frame and is used to drive the tipping wheel frame to rotate within a preset angle, so that the open side of the slag box faces towards or away from the silo. In the stopped state, the open side of the loading port faces the workshop entrance. After a forklift enters, it can directly place the slag box into the loading port, at which point the open side of the slag box faces upwards. During the tipping wheel frame's rotation, the open side of the slag box gradually tilts from facing upwards towards the silo until it reaches the preset maximum rotation angle, at which point the dry tar residue naturally falls into the silo.

[0008] A lifting platform is installed on the tipping wheel frame, and a clamping frame is fixedly installed at the output end of the lifting platform. The lifting platform is used to drive the clamping frame closer to or away from the opening of the slag box. When the clamping frame abuts against the open side of the slag box, the slag box is fixed inside the loading opening. Before the tipping wheel frame is turned over, it must be confirmed that the clamping frame is completely in contact with the top of the slag box to ensure that the slag box is locked inside the loading opening (this is generally achieved by using extrusion pressure to increase static friction between the structures). Otherwise, the slag box can easily fall off the tipping wheel frame during the turning process, causing a safety accident.

[0009] The control system interface of the coal blending device of this invention is located in the safe area of ​​the coal blending workshop. An infrared identification system is added to the control system and deeply integrated with the logic control system to achieve safe isolation and intelligent protection of the electric tilting unloading device. Once personnel leave the safe area, the infrared sensor immediately sends an interrupt signal to the PLC, triggering the emergency stop relay to cut off the power supply to the device and activating the audible and visual alarm device (which can be a flashing red warning light + buzzer alarm), while locking the operating terminal to prevent unauthorized operation.

[0010] Preferably, the tipping wheel frame includes two parallel wheels with their centers aligned on a straight line. The drive module drives the wheels to rotate around this straight line. A connecting beam is installed between the two wheels, positioned above the loading opening. Multiple crossbeams are located between the two wheels, one set of which, positioned above the loading opening, serves as the connecting beam (this connecting beam is essential to enhance the overall structural strength and deformation resistance of the tipping wheel frame). A certain distance exists between this connecting beam and the top of the loading opening, within which the clamping frame moves.

[0011] Preferably, the loading opening is a rectangular slot open on one side, and the rectangular slot matches the outer dimensions of the slag box. The open side of the loading opening has a slanted opening with a figure-eight structure, and the height of the slanted opening is less than the vertical movement range of the forklift plate. To increase the stability of the slag box in the loading opening, the height and depth of the loading opening are as close as possible to the outer dimensions of the slag box. With the slanted opening, when the forklift puts the slag box into the loading opening, the top and bottom surfaces of the slag box can be more easily put into the loading opening along the figure-eight structure of the slanted opening. Compared with a straight edge design, it is less likely to cause obstruction. (It is worth noting that the forklift plate of a general forklift is controlled by a chain drive or a screw drive, which has a certain amount of vertical movement. That is to say, even if there is a slight deviation between the lifting height of the slag box and the loading opening, the slag box can slide along the slanted opening and be finely adjusted upwards to accurately enter the loading opening. In actual operation, it is only necessary to control the bottom plane of the slag box to be higher than the bottom of the bottom slanted opening and lower than the bottom plane of the loading opening.)

[0012] Preferably, the drive module includes a servo motor mounted on the frame, a driving wheel and a driven wheel rotatably connected to the frame, one end of the driving wheel being connected to the output end of the servo motor, and both the driving wheel and the driven wheel meshing with the tilting wheel frame. The servo motor drives the tilting wheel frame to rotate through the driving wheel. The servo motor drives the driving wheel to rotate, causing the tilting wheel frame to rotate through meshing transmission. The driven wheel is located on the other side of the bottom of the tilting wheel frame relative to the driving wheel and is also meshed, providing auxiliary transmission and support for the tilting wheel frame.

[0013] Preferably, the rotation angle of the tipping wheel frame is 0 degrees to 125 degrees. When the slag box is inside the loading opening, as the tipping wheel frame rotates from 0 degrees to 125 degrees, the opening of the slag box changes from facing upwards to tilting towards the inlet of the silo. The tipping wheel frame carries the slag box and flips it over. When it flips to 90 degrees, the open side of the slag box is already facing the silo, and the dry tar residue slowly collapses downwards. With further flipping, all the dry tar residue slides into the silo.

[0014] Preferably, the bottom surface of the clamping frame has an arc-shaped raised structure, and two open-bottomed latches are provided on the clamping frame. When the slag box is in the loading port, the latches are directly opposite the top of the side plate of the slag box. The open side of the latches has an eight-shaped structure. When the top of the side plate of the slag box enters the latch, the slag box is fixed in the loading port. The clamping frame is above the slag box. When pouring dry tar slag, some dry slag can slide to both sides into the hopper along the arc-shaped raised surface of the clamping frame, avoiding material residue on the clamping frame. In addition, compared with the flat structure, the arc-shaped raised structure has a smaller contact area with the top of the slag box, and the fixing effect is generally not good. With the eight-shaped latches, the top of the side plate of the slag box can be completely locked after being inserted into the latch, greatly enhancing stability. Moreover, this method can be used to further calibrate the position of the slag box in the loading port (sometimes when the forklift cannot deliver the slag box into place, by moving the clamping frame down, in conjunction with the downward pressure of the latches on the side plate of the slag box, the slag box can be moved a small distance in the loading port until it is fully in place).

[0015] Furthermore, sensors are installed on the connecting beam, and alarms are installed on the tipping wheel frame. When the clamping frame rises or falls, the sensors detect the movement and send signals to the alarm. The sensors are spring-type pressure sensors, with their sensing ends connected to the clamping frame. When the clamping frame is at its furthest point on the open side of the slag box, the sensor detects a pressure threshold of T0. When the clamping frame abuts against the top surface of the slag box side plate, the sensor detects a pressure threshold of T1. When the pressure value detected by the sensor is T... X For T0 < T X When the distance is less than T1, the alarm will sound. Sometimes, during long-term operation of the elevator, malfunctions may occur, causing the clamping frame to fail to fully contact the slag box. If the equipment tilts during operation, the slag box could easily slip and cause a safety accident. Therefore, a sensor is installed to detect the actual travel of the clamping frame. The alarm will not sound when the clamping frame is in the initial state (T0) and fully clamped position (T1). However, if the clamping frame is not in position during the movement of the clamping frame or after the elevator has finished operating (T0 < T1), the alarm will sound. X <T1), the alarm continues to sound, the next flipping procedure of the equipment will not be started, and the operator is warned to stay away from the equipment and maintain a safe distance.

[0016] Furthermore, a vibrator is installed on the tipping wheel frame, and an excitation boss is installed at the output end of the vibrator. Both the vibrator and the excitation boss are located below the loading port. When the slag box is inside the loading port, the top surface of the excitation boss contacts the bottom surface of the slag box. A contact switch is installed on the tipping wheel frame, and another contact switch is installed on the frame. When the tipping wheel frame rotates 125 degrees, the contact switches are energized and send a signal to the control unit of the vibrator. The tipping wheel frame first rotates to 105 degrees, pouring most of the dry tar residue into the hopper. At this point, only some residue remains. It then rotates another 20 degrees to 125 degrees, energizing the contact switches and sending a signal to the control unit of the vibrator. The vibrator starts and transmits vibration to the bottom surface of the slag box through the excitation boss.

[0017] Preferably, the excitation bosses are arranged in a linear array of three groups, with the distance between each group greater than the width of the forklift's forks. Two sets of protective plates are fixedly connected to the tipping wheel frame, positioned between adjacent sets of excitation bosses. A figure-eight guide plate is fixedly connected to the front end of each protective plate. The protective plates have a groove structure, allowing the forklift's forks to extend horizontally into them. When the forklift delivers the slag box to the tipping wheel frame, the forks are at the bottom of the slag box, very close to the vibrator and excitation bosses. As the forklift approaches the equipment, the front end of the forks is prone to impacting the vibrator, causing damage. This three-set linearly distributed excitation boss structure, combined with the protective plates and the figure-eight guide plate, ensures that when the forklift moves, the forks enter the grooves of the protective plates, positioned precisely between adjacent excitation bosses, thus preventing impact.

[0018] A method for blending coal with tar residue, employing a novel tar residue coal blending device as described above, includes the following steps: S1: The forklift transports the slag box containing dry slag to the workshop, and then moves it with the lifting device of the forklift to the loading port. The staff operates the control system of the unloading unit from the safe area of ​​the workshop. S2: First, the elevator operates, controlling the clamping frame to approach the top of the slag box until the two touch, and the slag box is fixed in the loading port; S3: Then, the drive module starts, controlling the tipping wheel frame and the fixed slag box to rotate from 0 degrees to 125 degrees, and the tar dry slag is poured into the hopper during the rotation. S4: After the belt conveyor has been running for 30 minutes (when the belt conveyor has been running for about 30 minutes, the coking coal will begin to appear below the outlet of the screw conveyor, and the dry slag will be mixed with the coking coal), the electric discharge valve at the outlet of the silo will be opened, and the tar dry slag will fall into the screw conveyor. The screw conveyor will then be transported to the belt conveyor at a preset speed to mix with the coking coal. After being transported to the pelletizer, it will be made into tar coal blocks for coking.

[0019] The beneficial effects of this invention are: 1. The unloading unit, silo, and screw conveyor are all located inside a closed workshop, while the pelletizing machine is located outside the workshop. The belt conveyor passes through the workshop, realizing the fully enclosed transportation of tar residue from the slag box to the silo. This avoids the dust pollution problem caused by unloading in traditional outdoor open spaces, meets environmental protection requirements, and reduces the pressure on environmental governance. 2. A two-stage tipping unloading method of "105 degrees + 20 degrees" is adopted. First, the material is tipped 105 degrees to unload more than 85% of the dry tar residue. Then, it is tipped 20 degrees to 125 degrees and the vibrator is activated to shake out the remaining dry tar residue. The residual material rate is greatly reduced and the unloading thoroughness is significantly improved (experiments have verified that there is basically no residue in the slag box, while the traditional method leaves about 2% to 11% residue). 3. The segmented tilting unloading method avoids stress concentration on the equipment caused by a single large-angle tilting, making the tilting process more stable and reducing mechanical impact and wear. 4. By deploying infrared beam sensors at the boundary of the safe zone and combining them with the intelligent logic control of the PLC controller, accurate identification and protection of personnel in the safe zone are achieved. When personnel leave the safe zone, the system immediately triggers an emergency stop, activates an audible and visual alarm, and locks the operating terminal, greatly improving the system's reliability and security. 5. By using forklifts for transfer and unloading within the enclosed workshop, the secondary transfer costs associated with traditional dump truck transportation are avoided, thus reducing the transportation costs of dry slag reuse and coal blending. Attached Figure Description

[0020] Figure 1 The diagram shown is a three-dimensional structural schematic of the novel tar residue coal blending device of the present invention. Figure 2 The diagram shown is a front view of the novel tar residue coal blending device of the present invention. Figure 3 The diagram shown is a three-dimensional structural schematic of another state of the novel tar residue coal blending device of the present invention. Figure 4 The diagram shown is a front view of another state of the novel tar residue coal blending device of the present invention. Figure 5 The diagram shown is a three-dimensional structural schematic of the unloading unit of the present invention; Figure 6 The diagram shown illustrates the loading state of the unloading unit of the present invention with the slag box. Figure 7 The diagram shown is a front view of the unloading unit of the present invention. Figure 8 The diagram shown is a side view of the unloading unit of the present invention.

[0021] Explanation of reference numerals in the attached drawings: 1. Hopper; 2. Screw conveyor; 3. Belt conveyor; 4. Pelletizer; 5. Unloading unit; 6. Slag box; 501. Frame; 502. Tilting wheel frame; 5021. Connecting beam; 503. Loading port; 5031. Inclined opening; 504. Servo motor; 5041. Drive wheel; 5042. Driven wheel; 505. Elevator; 506. Pressing frame; 5061. Bayonet; 601. Vibrator; 6011. Vibration boss; 6012. Contact switch; 701. Sensor; 702. Alarm; 801. Protective plate; 802. Guide plate. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Please see Figures 1-4 This invention provides an embodiment of a novel tar residue coal blending device, comprising a silo 1, a screw conveyor 2 connected to the outlet of the silo 1, a belt conveyor 3 positioned below the outlet of the screw conveyor 2, a pelletizing machine 4 installed at the conveying end of the belt conveyor 3, and an unloading unit 5 installed on one side of the upper end of the silo 1. The unloading unit 5, the silo 1, and the screw conveyor 2 are all located within a secluded workshop, while the pelletizing machine 4 is located outside the workshop. The belt conveyor 3 passes through the workshop, with its starting and ending points connected to the screw conveyor 2 and the pelletizing machine 4, respectively. After a forklift enters the workshop, it only needs to lift the tar bin 6 and place it on the unloading unit 5. After the forklift leaves the workshop, the operator operates the control system located in the workshop's safe zone to pour the dry tar residue from the tar bin 6 into the silo 1, which is then conveyed to the pelletizing machine 4 by the conveying equipment. The conveying process does not generate dust, so the conveying end can pass through the workshop and be placed outside. The pelletizing machine 4 mixes and compresses the dry residue and coking coal into pellets for reuse in coking. The pelletizing machine 4 is an existing device that produces spherical particles from powdery or granular materials through physical or mechanical action. Its working principle can be simply summarized as follows: dry slag and coking coal are fed into an inclined rotating disc inside the pelletizing machine 4. Under the combined action of centrifugal force, friction, and gravity, they roll along the inner wall of the disc. After being moistened by pre-adding water or a binder, the materials gradually agglomerate into mother balls. During the rolling process, they continuously collide and squeeze, eventually forming spherical particles. Qualified particles overflow from the edge of the disc, while substandard particles are returned to the machine for further processing after screening.

[0024] The unloading unit 5 includes a frame 501 fixedly installed on one side of the upper end of the silo 1, a tipping wheel frame 502 rotatably connected to the frame 501, and a drive module installed on the frame 501. The tipping wheel frame 502 has a loading port 503, and the slag box 6 can be placed in the loading port 503 (the loading port 503 can be designed to match the size of the slag box 6, and is generally a rectangular structure for easy forklift transportation). The output end of the drive module is connected to the input end of the tipping wheel frame 502 and is used to drive the tipping wheel frame 502 to rotate within a preset angle, so that the opening of the slag box 6 faces or away from the silo 1. In the stopped state, the open side of the loading port 503 faces the entrance of the workshop. After the forklift enters, it can directly put the slag box 6 into the loading port 503. At this time, the opening of the slag box 6 faces upward. During the flipping process of the tipping wheel frame 502, the open side of the slag box 6 slowly tilts from facing upward towards the silo 1 until the preset maximum flipping angle is reached. At this time, the dry tar residue naturally falls into the silo 1.

[0025] A lifting platform 505 is installed on the tipping wheel frame 502. A clamping frame 506 is fixedly installed at the output end of the lifting platform 505. The lifting platform 505 is used to drive the clamping frame 506 closer to or further away from the opening of the slag box 6. When the clamping frame 506 abuts against the open side of the slag box 6, the slag box 6 is fixed inside the loading port 503. Before the tipping wheel frame 502 is tipped, it must be confirmed that the clamping frame 506 is completely in contact with the top of the slag box 6 to ensure that the slag box 6 is locked inside the loading port 503 (this is generally achieved by using extrusion pressure to increase static friction between the structures). Otherwise, the slag box 6 can easily fall off the tipping wheel frame 502 during the tipping process, causing a safety accident.

[0026] In practical applications, the operating interface of the coal blending device control system proposed in this invention is set within the safe zone of the coal blending workshop (near the workshop entrance, maintaining a distance of more than 10m from the equipment). An infrared identification system is added to the control system and deeply integrated with the logic control system to achieve safe isolation and intelligent protection of the electric tilting unloading device. Specifically, the control system deploys an infrared beam sensor 701 at the boundary of the safe zone to detect in real time whether the operator is within the safe range. Simultaneously, the PLC controller, as the core logic unit, receives signals from the sensor 701 and links with the operating terminal: when personnel are within the safe zone, the PLC allows the operation command to trigger equipment operation; once personnel leave the safe zone, the infrared sensor 701 immediately sends an interrupt signal to the PLC, triggering an emergency stop relay to cut off the device's power supply and activating an audible and visual alarm device (which can be a flashing red warning light + a buzzer alarm), while simultaneously locking the operating terminal to prevent unauthorized operation. Furthermore, to improve reliability, the system can adopt a dual-signal verification mechanism, i.e., the infrared beam sensor 701 and a thermal imager (to assist in identifying human thermal signals) work together to reduce the risk of false alarms; in addition, physically isolating the operating panel ensures that operations can only be performed within the safe zone, further eliminating dangerous operations. This design achieves multiple redundancy protections through pulse modulation signal anti-interference technology, fault self-testing logic (periodicly checking the status of sensor 701), and remote monitoring expansion interface, ensuring both personnel safety and meeting the requirements of industrial automation for efficient operation and functional safety.

[0027] Please see Figures 1-8In this embodiment, the tipping wheel frame 502 includes two parallel wheels with their centers on the same straight line. The drive module drives the wheels to rotate around this straight line as their axis. A connecting beam 5021 is installed between the two wheels, and the connecting beam 5021 is located above the loading port 503. Multiple crossbeam structures exist between the two wheels, one of which, located above the loading port 503, is the connecting beam 5021 (this connecting beam 5021 is necessary to enhance the overall structural strength and deformation resistance of the tipping wheel frame 502). A certain distance exists between the connecting beam 5021 and the top of the loading port 503, and the clamping frame 506 moves within this distance. The loading port 503 is a rectangular slot open on one side, and the rectangular slot matches the outer dimensions of the slag box 6. The open side of the loading port 503 has a slanted opening 5031 in a V-shape, and the height of the slanted opening 5031 is less than the vertical movement range of the fork plate. To increase the stability of the slag box 6 within the loading opening 503, the height and depth of the loading opening 503 are designed to closely match the external dimensions of the slag box 6. With the inclined opening 5031, when the forklift feeds the slag box 6 into the loading opening 503, the top and bottom surfaces of the slag box 6 can be more easily fed into the loading opening 503 along the V-shaped structure of the inclined opening 5031. Compared to a straight opening design, this reduces the likelihood of obstruction. (It is worth noting that forklifts typically control the lifting of the slag box 6 via a chain drive or screw drive, allowing for a certain amount of vertical movement. This means that even if there is a slight deviation between the lifting height of the slag box 6 and the loading opening 503, the slag box 6 can slide along the inclined opening 5031 and be precisely adjusted upwards to enter the loading opening 503. In actual operation, it is sufficient to ensure that the bottom plane of the slag box 6 is higher than the bottom of the inclined opening 5031 but lower than the bottom plane of the loading opening 503.)

[0028] Please see Figures 5-8In this embodiment, the drive module includes a servo motor 504 mounted on a frame 501, a drive wheel 5041 and a driven wheel 5042 rotatably connected to the frame 501. One end of the drive wheel 5041 is connected to the output end of the servo motor 504. Both the drive wheel 5041 and the driven wheel 5042 mesh with the tilting wheel frame 502. The servo motor 504 drives the drive wheel 5041 to rotate, causing the tilting wheel frame 502 to rotate through meshing transmission. The driven wheel 5042 is located on the other side of the bottom of the tilting wheel frame 502 relative to the drive wheel 5041 and also meshes with it, providing auxiliary transmission and support for the tilting wheel frame 502. The rotation angle of the tipping wheel frame 502 is 0 degrees to 125 degrees. When the slag box 6 is inside the loading port 503, as the tipping wheel frame 502 rotates from 0 degrees to 125 degrees, the opening of the slag box 6 changes from facing upwards to tilting towards the entrance of the silo 1. The tipping wheel frame 502 carries the slag box 6 and flips it together. When it flips to 90 degrees, the open side of the slag box 6 is already facing the silo 1, and the tar residue slowly collapses downwards. With further flipping, all the tar residue slides into the silo 1. In practical applications, a two-stage or three-stage flipping method is adopted. The two-stage method is 0 degrees to 105 degrees and 105 degrees to 125 degrees, and the three-stage method is 0 degrees to 55 degrees, 55 degrees to 105 degrees, and 105 degrees to 125 degrees. By unloading in stages, the stress concentration of the equipment caused by a single large-angle flip is avoided, making the flipping process more stable, reducing mechanical impact and wear, and extending the service life of the equipment.

[0029] Please see Figures 5-8In this embodiment, the bottom surface of the clamping frame 506 is an arc-shaped protrusion structure. The clamping frame 506 has two open-bottomed slots 5061. When the slag box 6 is inside the loading port 503, the slots 5061 are directly opposite the top of the side plate of the slag box 6. The open side of the slots 5061 is a figure-eight structure. When the top of the side plate of the slag box 6 enters the slots 5061, the slag box 6 is fixed inside the loading port 503. The clamping frame 506 is positioned above the slag box 6. When pouring dry tar slag, some of the slag can slide down into the hopper 1 along the arc-shaped protrusions of the clamping frame 506, preventing material residue from remaining on the clamping frame 506. Furthermore, compared to a flat structure, the arc-shaped protrusions have a smaller contact area with the top of the slag box 6, resulting in a less effective fixation. A figure-eight shaped locking slot 5061 is provided; once the top of the side plate of the slag box 6 is engaged with the slot 5061, it can be completely locked, greatly enhancing stability. This method can also be used to further calibrate the slag box 6 at the loading port 50. In position 3 (sometimes the forklift cannot deliver the slag box 6 into place; by moving the clamping frame 506 downwards, in conjunction with the downward pressure of the jaw 5061 on the side plate of the slag box 6, the slag box 6 moves a small distance within the loading opening 503 until it is fully in place. It is worth noting that when using the clamping frame 506 with the jaw 5061, a three-stage flipping method is required. First, control the slag box 6 to flip to 55 degrees. At this time, the slag box 6, which is not fully in place, has the potential energy to slide downwards at an angle. When the clamping frame 506 presses down at this time, the slag box 6 is easier to slide into place). A sensor 701 is installed on the connecting beam 5021, and an alarm 702 is installed on the tipping wheel frame 502. When the clamping frame 506 rises or falls, the sensor 701 detects and sends a signal to the alarm 702. The sensor 701 is a spring-type pressure sensor 701, and its sensing end is connected to the clamping frame 506. When the clamping frame 506 is at the farthest end of the open side of the slag box 6, the sensor 701 detects a pressure threshold of T0. When the clamping frame 506 abuts against the top surface of the side plate of the slag box 6, the sensor 701 detects a pressure threshold of T1. When the pressure value T detected by the sensor 701 is... X For T0 < T X When T1 < T1, alarm 702 will sound. During long-term operation, the elevator 505 may malfunction, causing the clamping frame 506 to fail to fully contact the slag box 6. If the equipment tilts during operation, the slag box 6 could easily slip, causing a safety accident. Therefore, sensor 701 is installed to detect the actual travel of the clamping frame 506. When the clamping frame 506 is in the initial state (T0) and fully clamped position (T1), alarm 702 (which can be an alarm light or buzzer) will not sound. However, if the clamping frame 506 is not in position during movement or after the elevator 505 has finished operating (T0 < T1), alarm 702 will sound. X <T1), alarm 702 continues to sound, the next flipping procedure of the equipment will not be started, and the operator will be warned to stay away from the equipment and maintain a safe distance.

[0030] Please see Figure 5 and Figure 7 In this embodiment, a vibrator 601 is installed on the tipping wheel frame 502, and an excitation boss 6011 is installed on the output end of the vibrator 601. Both the vibrator 601 and the excitation boss 6011 are located below the loading port 503. When the slag box 6 is inside the loading port 503, the top surface of the excitation boss 6011 is in contact with the bottom surface of the slag box 6 (it is worth noting that the bottom surface of the slag box 6 needs to be firmly pressed against the excitation boss 6011 to maintain a zero-gap state. The vibrator 601 can be a pneumatic power source and is installed on the crossbeam of the tipping wheel frame 502 with high-strength bolts). A contact switch 6012 is installed on the tipping wheel frame 502, and another contact switch 6012 is installed on the frame 501. When the tipping wheel frame 502 rotates 125 degrees, the contact switches 6012 are energized and send a signal to the control unit of the vibrator 601. The tipping wheel frame 502 first rotates to 105 degrees, pouring most of the dry tar residue into the hopper 1. At this point, only some residue remains. It then rotates again by 20 degrees to 125 degrees, and the contact switch 6012 is activated, sending a signal to the control unit of the vibrator 601. The vibrator 601 starts and transmits vibration to the bottom surface of the slag box 6 through the excitation boss 6011. The vibration frequency is preferably 75Hz-120Hz, the amplitude is 0.5-1mm, the excitation force is 1.5-12.5KN, and the vibration time is 3-5 seconds. The excitation bosses 6011 are arranged in a linear array of three groups, and the distance between each group is greater than the width of the forklift's forks. Two sets of protective plates 801 are fixedly connected to the tipping wheel frame 502. The two sets of protective plates 801 are located between two adjacent sets of excitation bosses 6011. The front end of the protective plate 801 is fixedly connected to a figure-eight shaped guide plate 802. The protective plate 801 is a groove structure and the forklift's insert plate can extend horizontally into the protective plate 801. When the forklift delivers the slag bin 6 onto the tipping wheel frame 502, the forks are at the bottom of the slag bin 6, very close to the vibrator 601 and the excitation boss 6011. As the forklift approaches the equipment, the front end of the forks is prone to colliding with the vibrator 601, causing damage. To address this, a structure with three linearly distributed excitation bosses 6011, along with a protective plate 801 and a V-shaped guide plate 802, is used. When the forklift moves, the forks enter the groove of the protective plate 801, precisely positioned between adjacent excitation bosses 6011, thus preventing collisions. In practical applications, guide lines are set on the workshop floor, aligned with the guide plate 802. After the forklift enters the workshop, it moves along the guide lines, allowing for very accurate positioning of the forks.

[0031] Please see Figures 1-8 In this embodiment, the present invention provides a method for blending coal with tar residue, employing a novel coal blending device with tar residue as described above, comprising the following steps: S1: The forklift transports the slag box 6 containing dry slag to the workshop, walks along the guide line set on the workshop floor and approaches the unloading unit 5, and then moves with the help of the forklift's lifting device (fork plate), and moves the slag box 6 into the loading port 503 along the guide plate 802 and the protective plate 801 (note that the bottom height of the slag box 6 should be between the bottom height of the inclined port 5031 and the bottom plane height of the loading port 503, and slide into the loading port 503 by using the vertical movement of the fork plate). The staff operates the control system of the unloading unit 5 (set with a one-button start and stop system) from the safe area of ​​the workshop. S2: First, the elevator 505 operates, controlling the clamping frame 506 to approach the top of the slag box 6 until the two are in contact (the top of the side plate of the slag box 6 enters through the bayonet 5061), and the slag box 6 is fixed in the loading port 503. During this process, the sensor 701 detects whether the stroke of the clamping frame 506 has reached the preset value. If the preset value has not been reached, the alarm 702 will continue to alarm, and the control system will automatically cut off the operation program. S3: Then, the drive module starts, and the servo motor 504 transmits power to the tipping wheel frame 502 through the drive wheel 5041, controlling the tipping wheel frame 502 and the fixed slag box 6 to rotate from 0 degrees to 105 degrees. More than 85% of the tar dry slag is poured into the hopper 1 during the rotation. S4: The tipping wheel frame 502 and the slag box 6 are kept at 105 degrees for 5-10 seconds, and then the servo motor 504 is started again to control the tipping wheel frame 502 and the slag box 6 to rotate again until they reach 125 degrees. At this time, the contact switch 6012 is energized. S5: After receiving the signal, the vibrator 601 starts and transmits vibration to the bottom surface of the slag box 6 through the excitation boss 6011, so that all the residual tar residue in the slag box 6 falls into the silo 1. S6: After the belt conveyor 3 has been running for 30 minutes (around 30 minutes after the belt conveyor 3 has been running, coking coal will begin to appear below the outlet of the screw conveyor 2, and the dry slag will be mixed with the coking coal. Note that the 30 minutes of belt conveyor 3 running is the waiting time required for the first start-up of the equipment on the same day. No waiting is required for the second coal blending and unloading), the electric unloading valve at the outlet of the silo 1 will be opened, and the tar dry slag will fall into the screw conveyor 2. The screw conveyor 2 will then be transported to the belt conveyor 3 at a preset rate to mix with the coking coal. After being transported to the pelletizer 4, it will be made into tar coal blocks for coking.

Claims

1. A novel coal blending device for tar residue, comprising a silo (1), a screw conveyor (2) connected to the outlet of the silo (1), a belt conveyor (3) disposed below the outlet of the screw conveyor (2), and a pelletizer (4) installed at the conveying end of the belt conveyor (3), characterized in that: It also includes a discharge unit (5) installed on one side of the upper end of the silo (1), wherein the discharge unit (5), the silo (1) and the screw conveyor (2) are all located in a closed workshop, the pelletizing machine (4) is located outside the workshop, and the belt conveyor (3) passes through the workshop and the conveying start and conveying end are respectively connected to the screw conveyor (2) and the pelletizing machine (4); The unloading unit (5) includes a frame (501) fixedly installed on one side of the upper end of the silo (1), a turning wheel frame (502) rotatably connected to the frame (501), and a drive module installed on the frame (501). The turning wheel frame (502) has a loading port (503) and the slag box (6) can be placed in the loading port (503). The output end of the drive module is connected to the input end of the turning wheel frame (502) and is used to drive the turning wheel frame (502) to rotate within a preset angle so that the opening of the slag box (6) faces or turns away from the silo (1). A lifting platform (505) is installed on the tipping wheel frame (502). A clamping frame (506) is fixedly installed at the output end of the lifting platform (505). The lifting platform (505) is used to drive the clamping frame (506) to approach or move away from the opening of the slag box (6). When the clamping frame (506) abuts against the opening side of the slag box (6), the slag box (6) is fixed inside the loading port (503).

2. The novel tar residue coal blending device according to claim 1, characterized in that: The material turning wheel frame (502) includes two parallel wheels with their centers on the same straight line. The drive module drives the wheels to rotate around the straight line as the axis. A connecting beam (5021) is installed between the two wheels and is located above the loading port (503).

3. The novel tar residue coal blending device according to claim 1, characterized in that: The loading port (503) is a rectangular slot with one side open, and the rectangular slot matches the outer dimensions of the slag box (6). The open side of the loading port (503) is provided with a slanted opening (5031) and has a figure-eight structure.

4. A novel tar residue coal blending device according to claim 1, characterized in that: The drive module includes a servo motor (504) mounted on the frame (501), a drive wheel (5041) and a driven wheel (5042) rotatably connected to the frame (501). One end of the drive wheel (5041) is connected to the output end of the servo motor (504). Both the drive wheel (5041) and the driven wheel (5042) mesh with the turning wheel frame (502). The servo motor (504) drives the turning wheel frame (502) to rotate through the drive wheel (5041).

5. A novel tar residue coal blending device according to claim 1, characterized in that: The rotation angle of the tipping wheel frame (502) is 0 degrees to 125 degrees. When the slag box (6) is inside the loading port (503), during the process of the tipping wheel frame (502) rotating from 0 degrees to 125 degrees, the opening of the slag box (6) changes from facing upwards to tilting towards the inlet of the silo (1).

6. A novel tar residue coal blending device according to claim 5, characterized in that: The bottom surface of the clamping frame (506) is an arc-shaped protrusion structure. The clamping frame (506) has two open-bottomed slots (5061). When the slag box (6) is in the loading port (503), the slots (5061) are directly opposite the top of the side plate of the slag box (6). The open side of the slots (5061) is a figure-eight structure. When the top of the side plate of the slag box (6) enters the slots (5061), the slag box (6) is fixed in the loading port (503).

7. A novel tar residue coal blending device according to claim 6, characterized in that: A vibrator (601) is installed on the tipping wheel frame (502). A vibration boss (6011) is installed at the output end of the vibrator (601). Both the vibrator (601) and the vibration boss (6011) are located below the loading port (503). When the slag box (6) is inside the loading port (503), the top surface of the vibration boss (6011) is in contact with the bottom surface of the slag box (6). A contact switch (6012) is installed on the material turning wheel frame (502), and another contact switch (6012) is installed on the frame (501). When the material turning wheel frame (502) rotates 125 degrees, the contact switches (6012) are energized and send a signal to the control unit of the vibrator (601).

8. A novel tar residue coal blending device according to claim 2, characterized in that: A sensor (701) is installed on the connecting beam (5021), and an alarm (702) is installed on the tipping wheel frame (502). When the clamping frame (506) rises or falls, the sensor (701) is used to detect and send a signal to the alarm (702). The sensor (701) is a spring-type pressure sensor (701), and its sensing end is connected to the clamping frame (506). When the clamping frame (506) is at the farthest end of the open side of the slag box (6), the sensor (701) detects a pressure threshold of T0. When the clamping frame (506) abuts against the top surface of the side plate of the slag box (6), the sensor (701) detects a pressure threshold of T1. When the pressure value T detected by the sensor (701) is T1, the sensor (701) detects a pressure threshold of T2. X For T0 < T X When <T1, the alarm (702) will sound.

9. A novel tar residue coal blending device according to claim 7, characterized in that: The excitation boss (6011) is arranged in a linear array of three groups, and the distance between each group is greater than the width of the forklift fork. Two sets of protective plates (801) are fixedly connected to the tipping wheel frame (502). The two sets of protective plates (801) are located between two adjacent sets of excitation bosses (6011). The front end of the protective plate (801) is fixedly connected to a guide plate (802) with a figure-eight structure. The protective plate (801) is a groove structure and the forklift's insert plate can be horizontally inserted into the protective plate (801).

10. A method for blending coal with tar residue, characterized in that: The novel tar residue coal blending device as described in claim 1 includes the following steps: S1: The forklift transports the slag box (6) containing dry slag to the workshop, and then moves it with the lifting device of the forklift to place the slag box (6) into the loading port (503). The staff operates the control system of the unloading unit (5) in the safe area of ​​the workshop. S2: First, the elevator (505) operates, controlling the clamping frame (506) to approach the top of the slag box (6) until the two touch, and the slag box (6) is fixed inside the loading port (503); S3: Then, the drive module starts and controls the tipping wheel frame (502) and the fixed slag box (6) to rotate from 0 degrees to 125 degrees. The tar dry slag is poured into the silo (1) during the rotation. S4: After the belt conveyor (3) has been running for 30 minutes, the electric unloading valve at the outlet of the silo (1) is opened, and the tar residue falls into the screw conveyor (2). The screw conveyor (2) then transports the residue to the belt conveyor (3) at a preset speed to mix with the coking coal. The residue is then transported to the pelletizer (4) to form tar coal blocks for coking.

Images