Coking coal blending tank cross-line blending device and blending method
By connecting idle coal blending bins with normal coal blending bins through cross-line allocation devices and control systems, the problem of fixed number of coking plant silos has been solved, enabling flexible allocation and cost optimization of coking coal types, and improving asset utilization and production safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- LIUZHOU IRON & STEEL
- Filing Date
- 2026-04-03
- Publication Date
- 2026-06-23
AI Technical Summary
The existing coking plants have a fixed number of coal blending bins, which makes it impossible to optimize the raw material structure. This results in a limited quantity of coking coal and the ineffective utilization of idle coal blending bin resources, leading to asset waste and high costs.
The design incorporates a cross-line coal blending device for coking coal, which connects idle coal blending troughs with normally operating coal blending troughs via cross-line conveyors and discharge chutes. Sensors and controllers are used to achieve coordinated control, ensuring that coal types are fed and mixed in proportion, and integrated process interlocks guarantee safety.
This has enabled the revitalization of idle coal blending bins, expanded the range of coal types that can be used for blending, reduced costs, improved asset utilization and production flexibility, and ensured safe and reliable production.
Smart Images
Figure CN122254286A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of coking equipment technology, and in particular to a coking coal blending trough cross-line blending device and blending method. Background Technology
[0002] In the coking process, coal blending is a crucial step in determining coke quality, achieving rational resource utilization, and improving economic efficiency. To reduce blending costs, enterprises generally adopt a multi-mine, multi-variety coking coal procurement strategy, controlling costs by optimizing coal type ratios. In actual production, corresponding coal blending troughs are set up on each production line, each including a conveyor. Above the conveyor and along its running direction, multiple coal blending bins are arranged. During operation, different types of coking coal are stored in each coal blending bin, operating continuously in a storage-blending-transfer mode to complete the storage, blending, and transfer of different types of coking coal. However, the number of coal blending bins on each production line in existing coking plants is fixed in the design phase. This limited number of bins creates a significant contradiction with the enterprise's diversified coal procurement strategy. This contradiction directly results in the number of coal types that can participate in blending being limited by the inherent number of coal blending bins. A large amount of cost-effective coking coal cannot be incorporated into the blending scheme in a timely manner, severely restricting the enterprise's technical path to achieve continuous cost reduction through raw material structure optimization. Meanwhile, against the backdrop of industry restructuring, some coking production lines have been forced to shut down due to policy requirements or market fluctuations, leaving their supporting large-scale process equipment, such as coal blending troughs, idle for extended periods, resulting in a serious waste of existing assets. Therefore, how to manufacture a coking coal blending trough cross-line blending device that integrates idle coal blending troughs with those in normal production is a new problem that urgently needs to be solved by those skilled in the art. Summary of the Invention
[0003] This invention provides a coking coal blending bin cross-line blending device and blending method. The device and blending method can solve the problems that existing coking coal blending bins have a fixed number of compartments, making it difficult to optimize the raw material structure to achieve cost reduction and efficiency improvement, as well as the problem that idle coal blending bin resources cannot be effectively utilized.
[0004] To solve the above problems, the technical solution adopted by this invention is as follows: This coking coal blending trough cross-line blending device includes a first coal blending trough in normal operation and a second coal blending trough in idle operation. The first coal blending trough includes a first conveyor, and multiple coal blending trough chambers are arranged above the first conveyor along its operating direction. The second coal blending trough includes a second conveyor, and multiple coal blending trough chambers are also arranged above the second conveyor along its operating direction. A first discharge chute is provided at the input end of the first conveyor, and a second discharge chute is provided at the output end of the second conveyor. A cross-line conveyor is provided between the first discharge chute and the second discharge chute. A first sensor is correspondingly provided on the first conveyor, the second conveyor, and the cross-line conveyor. The first sensor is used to detect the start-up and operating status of the corresponding conveyor. A feeder is provided below the outlet end of each coal blending trough chamber, and a second sensor is provided on the feeder. The second sensor is used to detect the discharge amount of the feeder. The first sensor is connected to a controller, and the second sensor is connected to a feeding drive motor through the controller. Its preparation method is as follows: a. Proportioning and feeding: The controller calculates the instantaneous feeding amount set value corresponding to each coal bin based on the proportion of each coal type in the preset coal blending formula. After comparing, analyzing and judging the real-time feeding amount signal collected by the second sensor, the controller outputs a speed adjustment signal to the feeding drive to regulate the feeding amount of each feeder, so that multiple coal types are fed synchronously according to the preset proportion. b. Material convergence and mixing: After each type of coal is metered and fed by its corresponding feeder, the coal flow from the coal blending bin above the first conveyor falls into the first conveyor below it; the coal flow from the coal blending bin above the second conveyor falls into the second conveyor below it, is transferred to the cross-line conveyor via the second discharge chute, and then conveyed by the cross-line conveyor to the first discharge chute, finally converging into the first conveyor; all types of coal complete their initial convergence on the first conveyor, and are then conveyed by the first conveyor to the subsequent mixing equipment for mixing to form blended coal; c. Interlocking Guarantee: The entire coal blending process is monitored by the process interlocking program built into the controller. The working logic of this process interlocking program includes two parts: system startup interlocking and operation safety interlocking. The system startup interlocking is as follows: Before coal blending starts, the controller collects equipment operation signals through the first sensor, confirms that the startup and operation status of the first conveyor, the second conveyor, and the cross-line conveyor are normal, and verifies that the sum of the set values of each coal type blending ratio is 100%, and then issues an operation command to each feeder. The operation safety interlocking is as follows: During the feeding process, if the actual flow rate of any feeder is continuously lower than the set flow rate lower limit, the controller immediately issues a synchronous emergency stop command to all feeders.
[0005] In the above technical solution, a more specific technical solution may be: the outlet end of the first discharge chute is located above the input end of the first conveyor; the inlet end of the second discharge chute is located below the output end of the second conveyor; the input end of the cross-line conveyor is located below the outlet end of the second discharge chute, and the output end of the cross-line conveyor is located above the inlet end of the first discharge chute.
[0006] Furthermore, the second sensor is used to detect the instantaneous feed rate of the feeder in real time.
[0007] Furthermore: the first conveyor, the second conveyor, and the cross-line conveyor are all belt conveyors; the first sensor is a speed sensor; the feeder is a quantitative feed scale; the second sensor includes a speed sensor and a weighing sensor; and the controller is a programmable controller.
[0008] Furthermore: the controller includes a first coal blending trough controller and a second coal blending trough controller, the PROFINET communication interface of the first coal blending trough controller is connected to the PROFINET communication interface of the second coal blending trough controller; the first sensor includes a first conveying sensor, a second conveying sensor and a cross-line conveying sensor; the first conveying sensor is correspondingly connected to the first coal blending trough controller, the second conveying sensor is correspondingly connected to the second coal blending trough controller, and the cross-line conveying sensor is correspondingly connected to one of the first coal blending trough controller and the second coal blending trough controller.
[0009] By adopting the above technical solution, the present invention has the following advantages compared with the prior art: 1. By combining the normally operating first coal blending trough with the idle second coal blending trough, and physically connecting the two by adding a cross-line conveyor and a matching discharge chute, along with the linkage control of the first and second sensors and the controller, and the coordinated operation process of proportioning execution, logistics convergence, and interlocking protection, the idle second coal blending trough system can be integrated into the extended resources of the operating production line, revitalizing idle fixed assets and increasing the number of silos that can participate in coal blending simultaneously. It can also expand the range of coal types that can be blended and enhance the flexibility of the coal blending scheme, enabling enterprises to reduce coal blending costs and stabilize coke quality through raw material optimization. At the same time, the process interlocking control system that interconnects the controllers of the first and second coal blending troughs eliminates coal blending ratio errors, ensuring safe and reliable production. Moreover, the scheme does not require large-scale modification of the original structure, relies on existing idle equipment, is easy to implement, has low modification costs, and significantly improves asset utilization and coal blending efficiency.
[0010] 2. By further defining the vertical correspondence between the first and second feeding chutes and each conveyor, as well as the structure of the docking position between the cross-line conveyor and the two chutes, it is possible to ensure smooth coal transfer without spillage or blockage, and to realize the stable, continuous, and reliable inflow of coal from the idle coal blending trough into the main production system, thereby improving material transfer efficiency and coal blending continuity. Attached Figure Description
[0011] Figure 1 This is a structural schematic diagram of an embodiment of the present invention.
[0012] Figure 2 yes Figure 1 A-direction view.
[0013] Figure 3 yes Figure 1 View B.
[0014] Figure 4 This is a schematic diagram of the structure of the second feeding chute and the cross-line conveyor in an embodiment of the present invention.
[0015] Figure 5 This is a block diagram illustrating the control principle of an embodiment of the present invention. Detailed Implementation
[0016] To make the above-mentioned objects, features, and advantages of the present invention more readily understood, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Many specific details are set forth in the following description in order to provide a thorough understanding of the present invention; however, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.
[0017] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "fixation," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.
[0018] like Figures 1-5The coking coal blending trough cross-line distribution device shown includes a first blending trough 1 in normal operation and a second blending trough 2 in idle operation. The first blending trough 1 includes a first conveyor 1-1, and multiple blending trough chambers 3 are arranged sequentially above the first conveyor 1-1 along its operating direction. Each blending trough chamber 3 is used to store different types of coking coal, and the outlet of each blending trough chamber 3 corresponds to the conveying surface of the first conveyor 1-1, so that the coal can fall smoothly onto the first conveyor 1-1. The second blending trough 2 includes a second conveyor 2-1, and multiple blending trough chambers 3 are also arranged above the second conveyor 2-1 along its operating direction. The specifications and structure of the blending trough chambers 3 are the same as those of the blending trough chambers 3 of the first blending trough 1, and they can store various types of coking coal simultaneously. The first conveyor 1-1 has a first discharge chute 4 at its input end, and the outlet end of the first discharge chute 4 is located above the input end of the first conveyor 1-1, so that the coal transported by the first discharge chute 4 can fall accurately into the first conveyor 1-1; the second conveyor 2-1 has a second discharge chute 5 at its output end, and the inlet end of the second discharge chute 5 is located below the output end of the second conveyor 2-1, so that all the coal on the second conveyor 2-1 can flow into the second discharge chute 5, avoiding material spillage. A cross-line conveyor 6 is provided between the first discharge chute 4 and the second discharge chute 5. The input end of the cross-line conveyor 6 is located below the outlet end of the second discharge chute 5, and the output end of the cross-line conveyor 6 is located above the inlet end of the first discharge chute 4, forming a material transfer path of second coal blending trough 2 → second conveyor 2-1 → second discharge chute 5 → cross-line conveyor 6 → first discharge chute 4 → first conveyor 1-1, ensuring that the coal in the second coal blending trough 2 can be smoothly transferred into the main conveying system of the first coal blending trough 1; the first conveyor 1-1, the second conveyor 2-1 and the cross-line conveyor 6 are all belt conveyors.First sensors 7 are respectively installed on the first conveyor 1-1, the second conveyor 2-1, and the cross-line conveyor 6. The first sensors 7 are speed sensors used to detect the start-up and running status of the corresponding conveyors. A feeder 8 is installed below the outlet end of each coal mixing bin 3. A second sensor 9 is installed on the feeder 8. In this embodiment, the feeder 8 is a quantitative feed scale. The second sensor 9 includes a speed sensor 9-1 and a weighing sensor 9-2. The speed sensor 9-1 is used to collect the linear speed of the quantitative feed scale belt in real time, and multiply it by the weight of the material per unit length detected by the weighing sensor 9-2 to obtain the instantaneous feed rate of the feeder 8. The first sensors 7 are correspondingly connected to the controller 10. The second sensors 9 are connected to the controller 10. It is electrically connected to the corresponding feeding drive 11, which is a motor; wherein: the first sensor 7 includes a first conveying sensor 7-1, a second conveying sensor 7-2, and a cross-line conveying sensor 7-3, the first conveying sensor 7-1 is installed on the first conveyor 1-1, the second conveying sensor 7-2 is installed on the second conveyor 2-1, and the cross-line conveying sensor 7-3 is installed on the cross-line conveyor 6; the controller 10 includes a first coal blending trough controller 10-1 and a second coal blending trough controller 10-2; the first coal blending trough controller 10-1 and the second coal blending trough controller 10-2 are both CPU 317-2 PN / DP (Model: 6ES7317-2EJ10-0AB0); The PROFINET communication interface of the first coal blending trough controller 10-1 is connected to the PROFINET communication interface of the second coal blending trough controller 10-2 as a data interaction interface; the two controllers are physically interconnected through an Ethernet cable to build a dedicated industrial communication network, thereby establishing a stable communication link between the two controllers, realizing real-time data interaction and collaborative control between the two parties, and ensuring the stable operation of the coal blending system. The first conveying sensor 7-1 is connected to the first coal blending trough controller 10-1, the second conveying sensor 7-2 is connected to the second coal blending trough controller 10-2, and the cross-line conveying sensor 7-3 is connected to one of the first coal blending trough controller 10-1 or the second coal blending trough controller 10-2. Both the first coal blending trough controller 10-1 and the second coal blending trough controller 10-2 are programmable controllers, each containing a process interlock program. These programs receive various signals transmitted from the first sensor 7 and the second sensor 9, simultaneously issue control commands to the feeding drive 11, and automatically monitor the entire coal blending process through the built-in process interlock program. Its preparation method is as follows: a. Proportioning and feeding: The controller calculates the instantaneous feeding amount set value corresponding to each coal bin based on the proportion of each coal type in the preset coal blending formula. After comparing, analyzing and judging the real-time feeding amount signal collected by the second sensor, the controller outputs a speed adjustment signal to the feeding drive to regulate the feeding amount of each feeder, so that multiple coal types are fed synchronously according to the preset proportion. b. Material convergence and mixing: After each type of coal is metered and fed by its corresponding feeder, the coal flow from the coal blending bin above the first conveyor falls into the first conveyor below it; the coal flow from the coal blending bin above the second conveyor falls into the second conveyor below it, is transferred to the cross-line conveyor via the second discharge chute, and then conveyed by the cross-line conveyor to the first discharge chute, finally converging into the first conveyor; all types of coal complete their initial convergence on the first conveyor, and are then conveyed by the first conveyor to the subsequent mixing equipment for mixing to form a uniformly composed blended coal; c. Interlocking Guarantee: The entire coal blending process is monitored by the process interlocking program built into the controller. The working logic of this process interlocking program includes two parts: system startup interlocking and operation safety interlocking. The system startup interlocking is as follows: Before coal blending starts, the controller collects equipment operation signals through the first sensor, confirms that the startup and operation status of the first conveyor, the second conveyor, and the cross-line conveyor are normal, and after verifying that the sum of the set values of each coal type blending ratio is 100%, it issues an operation command to each feeder. The operation safety interlocking is as follows: During the feeding process, if the actual flow rate of any feeder (regardless of whether it belongs to the first coal blending trough or the second coal blending trough) is continuously lower than the set flow rate lower limit, the controller immediately issues a synchronous emergency stop command to all feeders (i.e., all feeders in the first coal blending trough and the second coal blending trough).
[0019] This invention reliably connects the idle second coal blending trough system with the operating first coal blending trough system by adding a cross-line conveyor and a matching discharge chute. This revitalizes idle fixed assets, integrates idle coal blending troughs as extended resources, and increases the number of coal blending troughs that can participate in coal blending simultaneously, significantly improving asset utilization. The expansion of the number of coal blending troughs not only allows the production line to use more different varieties and cost-effective coking coal, enhancing the flexibility of the coal blending scheme and effectively implementing the enterprise's diversified coal source procurement strategy, but also reduces the overall coal blending cost and stabilizes coke quality through raw material optimization. At the same time, the integrated process interlocking control system starts production after verifying that the equipment is operating normally and the blending ratio is compliant. In case of abnormality, it triggers a synchronous shutdown of the entire system, eliminating coal blending ratio errors at the source and ensuring coal blending quality and production reliability in the cross-line blending mode. This invention does not require large-scale modification of the original coal blending trough main structure. It only adds a conveying mechanism and control logic and utilizes existing idle equipment to achieve the function. It is simple to implement, has low additional investment, and has strong practicality and economic value.
[0020] This invention can be modified and varied in various ways. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the scope of protection of this invention.
Claims
1. A coking coal blending trough cross-line distribution device, comprising a first coal blending trough in normal operation and a second coal blending trough in idle state, the first coal blending trough including a first conveyor, and a plurality of coal blending compartments arranged above the first conveyor along the running direction of the first conveyor; the second coal blending trough including a second conveyor, and a plurality of coal blending compartments also arranged above the second conveyor along the running direction of the second conveyor; characterized in that: The first conveyor has a first discharge chute at its input end, and the second conveyor has a second discharge chute at its output end. A cross-line conveyor is provided between the first and second discharge chutes. Each of the first, second, and cross-line conveyors is equipped with a first sensor, which is used to detect the start-up and running status of the corresponding conveyor. Each coal mixing bin has a feeder below its outlet end, and the feeder is equipped with a second sensor, which is used to detect the amount of material discharged by the feeder. The first sensor is connected to a controller, and the second sensor is connected to a feeding drive motor through the controller.
2. The coking coal blending trough cross-line distribution device according to claim 1, characterized in that: The outlet end of the first discharge chute is located above the input end of the first conveyor; the inlet end of the second discharge chute is located below the output end of the second conveyor; the input end of the cross-line conveyor is located below the outlet end of the second discharge chute, and the output end of the cross-line conveyor is located above the inlet end of the first discharge chute.
3. The coking coal blending trough cross-line distribution device according to claim 1 or 2, characterized in that: The second sensor is used to detect the instantaneous feed rate of the feeder in real time.
4. The coking coal blending trough cross-line distribution device according to claim 3, characterized in that: The first conveyor, the second conveyor, and the cross-line conveyor are all belt conveyors; the first sensor is a speed sensor; the feeder is a quantitative feed scale; the second sensor includes a speed sensor and a weighing sensor; and the controller is a programmable controller.
5. The coking coal blending trough cross-line mixing device according to claim 4, characterized in that: The controller includes a first coal blending trough controller and a second coal blending trough controller. The PROFINET communication interface of the first coal blending trough controller is connected to the PROFINET communication interface of the second coal blending trough controller. The first sensor includes a first conveying sensor, a second conveying sensor, and a cross-line conveying sensor. The first conveying sensor is connected to the first coal blending trough controller, the second conveying sensor is connected to the second coal blending trough controller, and the cross-line conveying sensor is connected to one of the first coal blending trough controller and the second coal blending trough controller.
6. A method for cross-line coal blending in coking plants, characterized in that: A coking coal blending trough cross-line blending device is adopted. This device includes a first blending trough in normal operation and a second blending trough in idle operation. The first blending trough includes a first conveyor, and multiple blending trough chambers are arranged above the first conveyor along its operating direction. The second blending trough includes a second conveyor, and multiple blending trough chambers are also arranged above the second conveyor along its operating direction. A first discharge chute is provided at the input end of the first conveyor, and a second discharge chute is provided at the output end of the second conveyor. A cross-line conveyor is provided between the first and second discharge chutes. Each of the first, second, and cross-line conveyors is equipped with a first sensor to detect the start-up and operating status of the corresponding conveyor. A feeder is provided below the outlet end of each blending trough chamber, and a second sensor is provided on the feeder to detect the feed rate. The first sensor is connected to a controller, and the second sensor is connected to a feeding drive motor through the controller. Its preparation method is as follows: a. Proportioning and feeding: The controller calculates the instantaneous feeding amount set value corresponding to each coal bin based on the proportion of each coal type in the preset coal blending formula. After comparing, analyzing and judging the real-time feeding amount signal collected by the second sensor, the controller outputs a speed adjustment signal to the feeding drive to regulate the feeding amount of each feeder, so that multiple coal types are fed synchronously according to the preset proportion. b. Material convergence and mixing: After each type of coal is metered and fed by its corresponding feeder, the coal flow from the coal blending bin above the first conveyor falls into the first conveyor below it; the coal flow from the coal blending bin above the second conveyor falls into the second conveyor below it, is transferred to the cross-line conveyor via the second discharge chute, and then conveyed by the cross-line conveyor to the first discharge chute, finally converging into the first conveyor; all types of coal complete their initial convergence on the first conveyor, and are then conveyed by the first conveyor to the subsequent mixing equipment for mixing to form blended coal; c. Interlocking Guarantee: The entire coal blending process is monitored by the process interlocking program built into the controller. The working logic of this process interlocking program includes two parts: system startup interlocking and operation safety interlocking. The system startup interlocking is as follows: Before coal blending starts, the controller collects equipment operation signals through the first sensor, confirms that the startup and operation status of the first conveyor, the second conveyor, and the cross-line conveyor are normal, and verifies that the sum of the set values of each coal type blending ratio is 100%, and then issues an operation command to each feeder. The operation safety interlocking is as follows: During the feeding process, if the actual flow rate of any feeder is continuously lower than the set flow rate lower limit, the controller immediately issues a synchronous emergency stop command to all feeders.
7. The method for cross-line coal blending in coking coal troughs according to claim 6, characterized in that: The outlet end of the first discharge chute is located above the input end of the first conveyor; the inlet end of the second discharge chute is located below the output end of the second conveyor; the input end of the cross-line conveyor is located below the outlet end of the second discharge chute, and the output end of the cross-line conveyor is located above the inlet end of the first discharge chute.
8. The method for cross-line blending of coking coal according to claim 6 or 7, characterized in that: The second sensor is used to detect the instantaneous feed rate of the feeder in real time.
9. The method for cross-line coal blending in coking plants according to claim 8, characterized in that: The first conveyor, the second conveyor, and the cross-line conveyor are all belt conveyors; the first sensor is a speed sensor; the feeder is a quantitative feed scale; the second sensor includes a speed sensor and a weighing sensor; and the controller is a programmable controller.
10. The method for cross-line blending of coking coal according to claim 9, characterized in that: The controller includes a first coal blending trough controller and a second coal blending trough controller. The PROFINET communication interface of the first coal blending trough controller is connected to the PROFINET communication interface of the second coal blending trough controller. The first sensor includes a first conveying sensor, a second conveying sensor, and a cross-line conveying sensor. The first conveying sensor is connected to the first coal blending trough controller, the second conveying sensor is connected to the second coal blending trough controller, and the cross-line conveying sensor is connected to one of the first coal blending trough controller and the second coal blending trough controller.