Automatic measurement and control system connected in series with coal quality analysis and coal preparation production line

Abstract

The invention relates to the technical field of ash content detection, and discloses a coal quality analysis and coal dressing production line series connection automatic measurement and control system which comprises a coal dressing conveying belt, a dynamic ratio detection device and a monitoring terminal. The time delay module is used for calculating a time node when a new material batch arrives at the intersection of the detection conveying belt and the dynamic ratio detection device according to the feeding batch recorded in the monitoring terminal; the control terminal controls the detection conveying belt to convey clean coal of a new material batch in the coal dressing conveying belt to a weighing hopper in the dynamic proportion detection device according to a time node; through the addition of the time delay module, the detection data of the dynamic ratio detection device correspond to the batch of the coal preparation plant, the design of the shunting disc is introduced, on the basis of not changing the existing working facilities and working environment of the coal preparation plant, the forms of clean coal sampling, filtering flow guide and vibration discharge promotion are realized, the single-time acquisition quantity meets the detection requirement, the structure is simple, and the environmental adaptability is good.

Description

Technical Field

[0001] This invention relates to the field of ash content detection technology, specifically an automatic measurement and control system that integrates coal quality analysis with a coal preparation production line. Background Technology

[0002] Coal ash content testing is mainly used in the coal preparation process to control coal quality. Coal undergoes flotation to obtain clean coal. Because coal preparation plants are integrated with mining operations, the continuous, large-scale coal beneficiation process requires frequent and long-term measurements. Different batches of clean coal need to be tested, and even within the same batch, multiple tests are needed to obtain a more accurate ash content value through averaging.

[0003] The method of obtaining ash value by testing coal slurry using the slurry preparation method is more accurate, but it requires solid-liquid mixing. Due to the need to ensure accuracy during quality testing and mixing, the material cannot be fed continuously, which is not conducive to continuous data acquisition.

[0004] Furthermore, the clean coal obtained by detecting ash content is located on the conveyor belt of the flotation coal. Since the coal conveying production line of the coal preparation plant is huge, if the branch series detection mechanism is connected on the basis of the existing conveying production line of the coal preparation plant, continuous intermittent detection can be carried out through computer control. In order to ensure output, the coal preparation plant uses large-sized conveyor belts. Therefore, it is necessary to connect small-volume conveying structures on large-sized conveyor belts to carry out series processes in order to meet the requirements of series process. Summary of the Invention

[0005] The purpose of this invention is to provide an automatic measurement and control system that integrates coal quality analysis with a coal preparation production line. This system is suitable for continuous, high-volume conveying systems in coal preparation plants, solving the problem of discontinuous processing caused by proportioning and slurry preparation in testing institutions, and achieving series matching with the existing conveying structure of coal preparation plants. By adding a time delay module, the detection data of the dynamic proportioning detection device corresponds to the batches in the coal preparation plant. Simultaneously, a diversion plate design is introduced to achieve clean coal sampling, filtration and diversion, and vibration-driven discharge without changing the existing working facilities and environment of the coal preparation plant. The single-pass volume meets the testing requirements, the system has a simple structure, and good environmental adaptability, thus solving the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] An automatic measurement and control system for coal quality analysis and coal preparation production line integration includes a coal preparation conveyor belt, a dynamic proportioning detection device, and a monitoring terminal. It also includes a detection conveyor belt, a time delay module, and a control terminal. The coal preparation conveyor belt and the dynamic proportioning detection device are connected via the detection conveyor belt. The time delay module calculates the time node when a new batch of material arrives at the intersection of the detection conveyor belt and the dynamic proportioning detection device based on the feeding batches recorded in the monitoring terminal. The control terminal controls the detection conveyor belt to transport the clean coal of the new batch of material from the coal preparation conveyor belt to the weighing hopper in the dynamic proportioning detection device, where it is then pulped and detected.

[0008] The same batch of materials are located in the detection conveyor belt and are intermittently conveyed to the weighing hopper in the dynamic proportion detection device through the detection conveyor belt. The dynamic proportion detection device acquires multiple batch detection data and prepares a data package.

[0009] The control terminal uses the time point at which the new batch of materials arrives at the intersection of the detection conveyor belt and the dynamic proportioning detection device as a basis to control the dynamic proportioning detection device to prepare a new batch data packet.

[0010] As a further aspect of the present invention: the dynamic proportioning detection device also has a liquid collection and weighing device. The dynamic proportioning detection device controls the liquid collection amount of the liquid collection and weighing device based on the weight of clean coal detected by the weighing hopper. When the solid-liquid mass ratio reaches the set value, the solid and liquid are added to the mixing chamber for mixing, and the mixed slurry is transported to the detection end to detect the ash value.

[0011] As a further embodiment of the present invention: a diverter is rotatably connected above the coal preparation conveyor belt, the diverter is supported by a rotating support frame, and a power component for driving the diverter to rotate is installed on the rotating support frame. The rotation axis of the diverter is perpendicular to the conveying direction of the coal preparation conveyor belt, and the diverter is located at the junction of the coal preparation conveyor belt and the detection conveyor belt.

[0012] As a further embodiment of the present invention: a through track is provided on the side of the diverter plate, the through track passes through the center of the diverter plate, a bucket is fixedly connected to one end of the through track, a multi-faceted conical cavity is fixedly connected to the inner wall of the diverter plate away from the opening of the bucket, and a filter layer is fixedly connected to the top surface of the multi-faceted conical cavity.

[0013] As a further embodiment of the present invention: a flap is rotatably connected to the side of the filter layer away from the bucket, and the filter layer and the flap cooperate to close the open end of the multifaceted cone cavity.

[0014] As a further embodiment of the present invention: a guide pipe is fixedly connected to the side of the multifaceted conical cavity, the guide pipe extends out from the side wall of the diverter plate, and the guide pipe is located outside the coal preparation conveyor belt.

[0015] As a further embodiment of the present invention: when the opening end of the guide tube is at its lowest point, the opening end of the guide tube is located above the detection conveyor belt.

[0016] As a further embodiment of the present invention: when the diverter plate is stationary, the guide pipe and the bucket are located above the flapper, and the guide pipe and the bucket are at the same horizontal height, the opening end of the bucket is downward, and the flapper is in the open state due to gravity.

[0017] As a further aspect of the present invention: when the diverter is in a static state, the bottom edge of the circumferential side of the diverter has a gap with the surface of the coal seam at the top of the coal preparation conveyor belt.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] This system is suitable for continuous, high-volume conveying systems in coal preparation plants, solving the problem of non-continuous processing caused by proportioning and slurry preparation in testing institutions, and achieving series matching with the existing conveying structure of coal preparation plants. By adding a time delay module, the detection data of the dynamic proportioning testing device corresponds to the batches in the coal preparation plant. Simultaneously, the introduction of a diversion plate design enables clean coal sampling, filtration and diversion, and vibration-driven discharge without altering the existing working facilities and environment of the coal preparation plant, achieving a residue-free process. The single-pass volume meets testing requirements, and the system features a simple structure and good environmental adaptability. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a system diagram of an automatic measurement and control system that integrates coal quality analysis with a coal preparation production line.

[0022] Figure 2 A schematic diagram showing the addition of a flow divider plate to an automatic measurement and control system that connects coal quality analysis and coal preparation production lines.

[0023] Figure 3 A schematic cross-sectional view of a flow divider in an automatic measurement and control system that integrates coal quality analysis and coal preparation production lines.

[0024] Figure 4 A schematic diagram of the use of a flow divider in an automatic measurement and control system that connects coal quality analysis and coal preparation production line;

[0025] In the diagram: 100, Coal preparation conveyor belt; 200, Detection conveyor belt; 300, Dynamic proportioning detection device; 400, Monitoring terminal; 500, Time delay module; 600, Control terminal; 1, Diverter plate; 11, Through track; 12, Filter layer; 13, Flip plate; 14, Multi-faceted cone cavity; 15, Bucket; 2, Rotating support frame; 3, Guide pipe. Detailed Implementation

[0026] Please see Figures 1-4 In this embodiment, the system includes a coal preparation conveyor belt 100, a dynamic proportioning detection device 300, and a monitoring terminal 400. It also includes a detection conveyor belt 200, a time delay module 500, and a control terminal 600. The coal preparation conveyor belt 100 and the dynamic proportioning detection device 300 are connected via the detection conveyor belt 200. The time delay module 500 calculates the time node when a new batch of material arrives at the intersection of the detection conveyor belt 200 and the dynamic proportioning detection device 300 based on the feeding batches recorded in the monitoring terminal 400. The control terminal 600 controls the detection conveyor belt 200 to transport the clean coal of the new batch of material from the coal preparation conveyor belt 100 to the weighing hopper in the dynamic proportioning detection device 300, where it is then slurryed and detected.

[0027] In a coal preparation plant, coal undergoes multiple processes to obtain clean coal through flotation. The coal preparation plant has a monitoring terminal 400, which records the coal flotation batches. The batches are often set by the manufacturer, and the batch number can be marked according to the source, single output, etc. Each batch of coal needs to have a corresponding ash content value to determine its physicochemical properties. The target object detected by the dynamic proportioning detection device 300 is located at the end of the entire flotation process. Therefore, when the monitoring terminal 400 updates the coal batch, there is a delay in the arrival of the new batch of coal at the dynamic proportioning detection device 300. Thus, a time delay module 500 is set up.

[0028] The dynamic proportioning detection device 300 also has a liquid collection and weighing device. The dynamic proportioning detection device 300 controls the liquid collection amount of the liquid collection and weighing device based on the weight of clean coal detected by the weighing hopper. When the solid-liquid mass ratio reaches the set value, the solid and liquid are added to the mixing chamber for mixing, and the mixed slurry is transported to the detection end to detect the ash value.

[0029] If the dynamic proportioning detection device 300 is connected in series with the coal preparation conveyor belt 100, then the detection conveyor belt 200 is required. Due to the impact of batch number updates, the addition of the time delay module 500 can accurately determine the time when the monitoring terminal 400 starts the detection conveyor belt 200 after detecting a coal batch number update. When a single batch is tested once, after the previous batch of material is tested, the dynamic proportioning detection device 300 performs backflushing cleaning. After the monitoring terminal 400 obtains the new batch of coal, the time delay module 500 calculates the time it takes for the new batch of coal to reach the intersection of the detection conveyor belt 200 and the coal preparation conveyor belt 100. When the control terminal 600 detects that the time is greater than the time it takes for the new batch of coal to reach the intersection of the detection conveyor belt 200 and the coal preparation conveyor belt 100, it starts the detection conveyor belt 200 to collect samples and transport them to the dynamic proportioning detection device 300 for testing. At this time, the detection value at the dynamic proportioning detection device 300 corresponds to the coal batch number.

[0030] The delay module 500 can obtain the delay time based on the process flow time or the material outflow time of multiple process steps' independent equipment, combined with the conveyor belt's transport speed. The control terminal 600 mainly controls the feeding, mixing, detection, backflushing of the dynamic proportioning detection device 300, as well as the conveying of the detection conveyor belt 200. The feeding, mixing, detection, and backflushing are recorded as a complete detection time.

[0031] Furthermore, materials of the same batch are located within the detection conveyor belt 200 and are intermittently conveyed to the weighing hopper within the dynamic proportioning detection device 300 via the detection conveyor belt 200. The dynamic proportioning detection device 300 acquires multiple batch detection data and prepares a data package. The control terminal 600 controls the dynamic proportioning detection device 300 to prepare a new batch data package based on the time node at which the new batch of materials arrives at the intersection of the detection conveyor belt 200 and the dynamic proportioning detection device 300.

[0032] This method, by averaging multiple samples from the same batch of coal, yields an ash content value that more closely approximates the actual value. The specific implementation method is as follows:

[0033] The detection conveyor belt 200 has a certain length, therefore it moves intermittently. Coal of the same batch is conveyed sequentially on the coal preparation conveyor belt 100. The detection conveyor belt 200 moves one step at a time. Coal from the coal preparation conveyor belt 100 is added to the detection conveyor belt 200 by means of a robotic arm or manual control. There are multiple coal piles above the detection conveyor belt 200. As the length of the coal piles above the detection conveyor belt 200 reaches the dynamic proportioning detection device 300, the detection conveyor belt 200 moves another step, at which point one coal pile falls into the weighing hopper of the dynamic proportioning detection device 300. The advantage of this method is that equipment using spectroscopy and / or X-ray to detect ash content requires the activation of waste heat, which is coupled with the dynamic operation of the dynamic proportioning detection device 300.

[0034] At this time, the control terminal 600 uses the time node at which the new batch of materials arrives at the intersection of the detection conveyor belt 200 and the dynamic proportion detection device 300 as the basis, and uses the sum of the current time node and the time of the detection conveyor belt 200 to the dynamic proportion detection device 300 to control the dynamic proportion detection device 300 to prepare the new batch data packet.

[0035] The above describes the series connection between the dynamic proportioning detection device 300 and the detection conveyor belt 200. However, the coal preparation conveyor belt 100 is only a section of the conveyor belt. The entire conveying scale is huge, so the specifications of the conveyor belt are large. The robotic arm is a high-precision device. There are also crushing mechanisms, such as jaw crushers, in the vicinity of the coal preparation conveyor belt 100. The ground is prone to vibration, and the robotic arm is easily affected by vibration, which can lead to accuracy problems. Visual acquisition is also easily affected by lens shaking, which can lead to analysis errors.

[0036] Therefore, equipment suitable for this environment needs to have a simple structure and be able to achieve the purpose of reversing conveying, and preferably should not affect the structure of the current coal preparation conveyor belt 100. The following improvements are made to address this issue:

[0037] Improvements: A diverter plate 1 is rotatably connected above the coal preparation conveyor belt 100. The diverter plate 1 is supported by a rotating support frame 2, on which a power component for driving the diverter plate 1 to rotate is installed. The rotation axis of the diverter plate 1 is perpendicular to the conveying direction of the coal preparation conveyor belt 100. The diverter plate 1 is located at the junction of the coal preparation conveyor belt 100 and the detection conveyor belt 200. A through track 11 is opened on the side of the diverter plate 1, passing through the center of the diverter plate 1. A bucket 15 is fixedly connected to one end of the through track 11. A multi-faceted conical cavity 14 is fixedly connected to the cavity on the inner wall of the diverter plate 1 away from the opening direction of the bucket 15. A filter layer 12 is fixedly connected to the top surface of the multi-faceted conical cavity 14. The filter layer 12 rotates on the side away from the bucket 15. A flap 13 is dynamically connected to the filter layer 12. The flap 13 and the filter layer 12 cooperate to close the open end of the multifaceted cone cavity 14. A guide pipe 3 is fixedly connected to the side of the multifaceted cone cavity 14. The guide pipe 3 passes through the side wall of the diverter plate 1 and is located outside the coal preparation conveyor belt 100. When the open end of the guide pipe 3 is at the lowest point, the open end of the guide pipe 3 is above the detection conveyor belt 200. When the diverter plate 1 is stationary, the guide pipe 3 and the bucket 15 are located above the flap 13 and are at the same horizontal height. The open end of the bucket 15 is downward. The flap 13 is in the open state due to gravity. When the diverter plate 1 is stationary, there is a gap between the bottom of the circumferential side of the diverter plate 1 and the surface of the coal layer at the top of the coal preparation conveyor belt 100.

[0038] Please see Figures 2-4The diverter plate 1 is disc-shaped. During the rotation of the diverter plate 1, the bucket 15 is inserted into the coal seam above the coal preparation conveyor belt 100. The conveying action of the coal preparation conveyor belt 100 on the coal seam allows clean coal to enter through the open end of the bucket 15. The diverter plate 1 continues to rotate, and the clean coal enters the through track 11. The filter layer 12 is located below the clean coal, and the clean coal enters the multifaceted cone cavity 14 through the filter layer 12. As the entry end of the clean coal in the through track 11 gradually rises, the clean coal slides on the filter layer 12, causing the clean coal to be spread evenly on the filter layer 12. Filtered clean coal smaller than 1mm enters the multifaceted cone cavity 14. Since the guide pipe 3 is located at the bottom of the multifaceted cone cavity 14, when the discharge end of the guide pipe 3 is at the lowest point, the converging tip of the multifaceted cone cavity 14 is also at the lowest point. At this time, the filtered clean coal can be discharged into the detection conveyor belt 200 through the inclined guide pipe 3.

[0039] As the diversion plate 1 continues to rotate, the large coal particles located inside the through track 11 and above the filter layer 12 are discharged to the coal preparation conveyor belt 100 through the other end of the through track 11. Since the large coal particles do not meet the pulping conditions, but do not affect subsequent use, no coal will be retained.

[0040] Furthermore, the clean coal inside the flap 13 is not completely discharged through the guide pipe 3. To avoid residue, the flap 13 structure is installed. Please refer to [link / reference]. Figure 4 When the distributor plate 1 rotates to Figure 4 When in the posture shown in the lower right figure, the flap 13 is opened by gravity. At this time, the residual coal inside the flap 13 is discharged to the coal preparation conveyor belt 100 through the flap 13. The coal on the side of the filter layer 12 near the through track 11 is affected by gravity and ground vibration and falls into the through track 11 to reach the smooth surface. It is then guided to the coal preparation conveyor belt 100 through the smooth surface of the through track 11.

[0041] Additional explanation: The vibration generated by the ground in the area where the coal preparation conveyor belt 100 is located promotes the separation of residual clean coal in the diversion plate 1, reducing particle residue inside the diversion plate 1. When the clean coal above the filter layer 12 near the multifaceted cone cavity 14 cannot fall off under vibration, the impact of a small amount of clean coal particles from other batches is minimal in subsequent multiple tests.

[0042] The rotating support frame 2 is fixed to the ground, and the vibration of the ground can be transmitted to the diversion plate 1 through the rotating support frame 2 to promote the separation of clean coal.

[0043] When at rest, maintain Figure 4 The posture shown in the lower right image promotes the discharge of residual clean coal without interfering with the coal conveying of the coal preparation conveyor belt 100.

[0044] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An automatic measurement and control system for coal quality analysis and coal preparation production line in series, comprising a coal preparation conveyor belt (100), a dynamic proportioning detection device (300), and a monitoring terminal (400), characterized in that: It also includes a detection conveyor belt (200), a time delay module (500), and a control terminal (600). The coal preparation conveyor belt (100) and the dynamic proportion detection device (300) are connected through the detection conveyor belt (200). The time delay module (500) calculates the time node when the new material batch arrives at the intersection of the detection conveyor belt (200) and the dynamic proportion detection device (300) based on the feeding batch recorded in the monitoring terminal (400). The control terminal (600) controls the detection conveyor belt (200) to transport the clean coal of the new material batch in the coal preparation conveyor belt (100) to the weighing hopper in the dynamic proportion detection device (300) according to the time node, and the dynamic proportion detection device (300) performs slurry preparation and detection. Materials of the same batch are located in the detection conveyor belt (200) and are intermittently conveyed to the weighing hopper in the dynamic proportion detection device (300) through the detection conveyor belt (200). The dynamic proportion detection device (300) acquires multiple batch detection data and prepares a data package. The control terminal (600) controls the dynamic proportioning detection device (300) to prepare a new batch data packet based on the time node at which the new batch of materials arrives at the intersection of the detection conveyor belt (200) and the dynamic proportioning detection device (300).

2. The automatic measurement and control system for coal quality analysis and coal preparation production line in series according to claim 1, characterized in that: The dynamic proportioning detection device (300) also has a liquid collection and weighing device. The dynamic proportioning detection device (300) controls the liquid collection amount of the liquid collection and weighing device based on the weight of clean coal detected by the weighing hopper. When the solid-liquid mass ratio reaches the set value, the solid and liquid are put into the mixing chamber for mixing, and the mixed slurry is transported to the detection end to detect the gray value.

3. The automatic measurement and control system for coal quality analysis and coal preparation production line in series according to claim 1, characterized in that: A diverter plate (1) is rotatably connected above the coal preparation conveyor belt (100). The diverter plate (1) is supported by a rotating support frame (2). A power component that drives the diverter plate (1) to rotate is installed on the rotating support frame (2). The rotation axis of the diverter plate (1) is perpendicular to the conveying direction of the coal preparation conveyor belt (100). The diverter plate (1) is located at the junction of the coal preparation conveyor belt (100) and the detection conveyor belt (200).

4. The automatic measurement and control system for coal quality analysis and coal preparation production line in series according to claim 3, characterized in that: The side of the diversion plate (1) is provided with a through track (11), which passes through the center of the diversion plate (1). One end of the through track (11) is fixedly connected to a bucket (15). A multi-faceted conical cavity (14) is fixedly connected in the cavity of the inner wall of the diversion plate (1) away from the opening direction of the bucket (15). A filter layer (12) is fixedly connected to the top surface of the multi-faceted conical cavity (14).

5. The automatic measurement and control system for coal quality analysis and coal preparation production line in series according to claim 4, characterized in that: The filter layer (12) is rotatably connected to a flap (13) on the side away from the bucket (15), and the filter layer (12) and the flap (13) cooperate to close the open end of the multifaceted cone cavity (14).

6. The automatic measurement and control system for coal quality analysis and coal preparation production line in series according to claim 5, characterized in that: A guide pipe (3) is fixedly connected to the side of the multifaceted conical cavity (14). The guide pipe (3) extends out from the side wall of the diverter plate (1) and is located outside the coal preparation conveyor belt (100).

7. The automatic measurement and control system for coal quality analysis and coal preparation production line in series according to claim 6, characterized in that: When the opening end of the guide tube (3) is at its lowest point, the opening end of the guide tube (3) is above the detection conveyor belt (200).

8. The automatic measurement and control system for coal quality analysis and coal preparation production line in series according to claim 6, characterized in that: When the diverter plate (1) is stationary, the guide pipe (3) and the bucket (15) are located above the flap (13), and the guide pipe (3) and the bucket (15) are at the same horizontal height. The opening end of the bucket (15) is downward, and the flap (13) is in the open state due to gravity.

9. The automatic measurement and control system for coal quality analysis and coal preparation production line in series according to claim 6, characterized in that: When the diverter plate (1) is stationary, there is a gap between the bottom edge of the circumferential side of the diverter plate (1) and the surface of the coal seam at the top of the coal preparation conveyor belt (100).

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