Coal blending system

Abstract

The invention discloses a coal blending system which is characterized in that all hard coal blending units and non-hard coal blending units in the coal blending system are arranged in a row along a first direction, namely all the coal blending units are arranged in a single row; different kinds of coal in the coal transfer station can be conveyed to the corresponding coal blending units only by arranging one first conveying component above the coal blending units, the number of conveying devices above the coal blending units is reduced by one time, the height of a feeding conveyor is reduced, dust removal devices are reduced, and the civil engineering investment cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of coal blending, and in particular to a coal blending system. Background Art

[0002] To conserve scarce coking coal resources, expand the range of coking coal used, reduce costs, and improve coke quality, the advantages of stamp-charged coke ovens are increasingly recognized by users. Stamp-charged coke ovens utilize over a dozen different types of coking coal, with relatively inexpensive smaller coal grades becoming increasingly popular. However, the proportions of each individual type vary widely. Optimizing the coal blending process and equipment selection has become a key research topic for coking plants.

[0003] Current technology typically uses two rows of coal bunkers for blending coal in stamping coke ovens: one row delivers hard coal to the pre-crusher chamber for crushing, and the other row delivers coal that does not require pre-crushing directly to the crusher chamber for crushing. This dual-row arrangement requires at least two feed conveyors, increases the height of the feed transfer station, and requires additional dust removal facilities, resulting in high construction and equipment investments.

[0004] How to simplify the structure of the coal blending system as much as possible and thus reduce the manufacturing cost is an important issue that has always been of concern to those skilled in the art. Summary of the Invention

[0005] The purpose of the embodiments of the present application is to provide a coal blending system, which can reduce the height of the feed transfer station, reduce dust removal equipment, and reduce civil engineering investment costs.

[0006] The present invention provides a coal blending system, comprising:

[0007] a coal blending chamber, wherein at least one hard coal blending unit and at least one non-hard coal blending unit are disposed inside the coal blending chamber, wherein all the hard coal blending units and all the non-hard coal blending units are arranged in a row along a first direction, wherein each of the hard coal blending units and each of the non-hard coal blending units comprises at least a coal blending bin and a weighing component, wherein a valve is provided at a discharge port of the coal blending bin, and the weighing component is located below the discharge port of the coal blending bin;

[0008] a first conveying member and a discharge device, wherein the first conveying member extends along the first direction and is used to convey the coal in the coal transfer station to the location of the hard coal blending unit or the non-hard coal blending unit, and the discharge device is used to unload the coal on the first conveying member from the hard coal blending unit or the non-hard coal blending unit;

[0009] The discharging conveying component is used to convey the coal material weighed by the weighing component to the subsequent work station.

[0010] Compared with the prior art in which two conveyor belts are set in the coal blending unit, in the embodiment of the present application, the hard coal blending unit and the non-hard coal blending unit are arranged in a row along the first direction, that is, all the coal blending units are arranged in a single row, and only one first conveying component is set above the coal blending unit to transport different types of coal in the coal transfer station to the corresponding coal blending unit. The conveying equipment above the coal blending unit is reduced by half, which is also conducive to reducing the height of the feed conveyor, reducing dust removal equipment, and reducing civil engineering investment costs.

[0011] In one example, the discharge conveying component includes a second conveying component and a third conveying component;

[0012] The second conveying component is used to convey the hard coal material weighed by the weighing component of the hard coal blending unit to the pre-crusher;

[0013] The third conveying component is used to convey the non-hard coal material weighed by the weighing component of the non-hard coal blending unit to the pulverizer.

[0014] In one example, the third conveying member is at least partially located below the discharge port of the pre-crusher so as to convey the hard coal material crushed by the pre-crusher to the crusher;

[0015] Alternatively, or / and, the second conveying component and the third conveying component both include a first belt conveyor and a second belt conveyor, the first belt conveyor extends from the coal blending chamber to the coal transfer station, the second belt conveyor extends from the coal transfer station to the pre-crusher or the crusher, and the coal material on the first belt conveyor can fall from the end located at the coal transfer station to the second belt conveyor.

[0016] In one example, the unloading point of the weighing component of the hard coal blending unit and the unloading point of the weighing component of the non-hard coal blending unit are located on different sides of the coal blending bin, so that the conveying sections of the second conveying component and the third conveying component located inside the coal blending chamber are at least partially staggered in the horizontal plane.

[0017] In one example, the weighing component is a belt scale, and the batching capacities of the belt scales in at least two of all the hard coal blending units and all the non-hard coal blending units are different.

[0018] In one example, the unloading device is reciprocatingly movable along the first conveying component.

[0019] In one example, all of the hard coal blending units are continuously arranged, and all of the non-hard coal blending units are continuously arranged.

[0020] In one example, each of the hard coal blending units and each of the non-hard coal blending units further includes a feeder, which is located between the coal blending bin and the weighing component, and the coal in the coal blending bin is fed into the weighing component through the feeder.

[0021] In one example, the feeder is a disc feeder, which includes a driving component, a disc and a scraper. The driving component is used to drive the disc to rotate, and the scraper is used to scrape the coal on the disc to the weighing component.

[0022] In one example, the unloading point of the feeder in all the hard coal blending units is located on a first side of the feeder; and the unloading point of the feeder in all the non-hard coal blending units is located on a side of the feeder away from the first side. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a structural block diagram of a coal blending system in an embodiment provided in the present application;

[0024] Figure 2 A schematic structural diagram of a coal blending system according to an embodiment of the present application is provided;

[0025] Figure 3 for Figure 2 The floor plan of the coal blending system provided;

[0026] Figure 4 for Figure 2 A perspective view of a hard coal blending unit in the coal blending system shown;

[0027] Figure 5 for Figure 2 A three-dimensional view of the non-hard coal blending unit in the coal blending system shown.

[0028] in, Figures 1 to 5 The reference numerals in the figures are described as follows:

[0029] 100 Coal transfer station; 1 Feed conveyor; 200 Coal blending chamber; 2 First conveying component; 3 Unloading equipment; 201 Hard coal blending unit; 202 Non-hard coal blending unit; 4 Coal blending bin; 5 Valve; 6 Feeder; 7 Weighing component; 8 Second conveying component; 81 First hard coal belt conveyor; 82 Second hard coal belt conveyor; 9 Third conveying component; 91 First non-hard coal belt conveyor; 92 Second non-hard coal belt conveyor;

[0030] 300 pre-crusher room; 12 pre-crusher; 400 crusher room; 13 crusher; DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the technical solutions of the embodiments of the present application, the embodiments of the present application are further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] Please refer to Figures 1 to 5 , Figure 1 This is a structural block diagram of a coal blending system in an embodiment provided in the present application; Figure 2 A schematic structural diagram of a coal blending system according to an embodiment of the present application is provided; Figure 3 for Figure 2 The floor plan of the coal blending system provided; Figure 4 for Figure 2 A perspective view of a hard coal blending unit in the coal blending system shown; Figure 5 for Figure 2 The three-dimensional diagram of the non-hard coal blending unit in the coal blending system shown. Figure 1 and Figure 2 The middle arrow indicates the direction of coal transportation. Figure 4 and Figure 5 A and B represent the two sides of the coal bunker respectively.

[0033] The embodiment of the present application provides a coal blending system that can be used to blend coal for ramming coke ovens or other types of coke ovens. The coal blending system includes a coal transfer station 100, a coal blending chamber 200, a pre-crusher chamber 300, and a crusher chamber 400. The coal transfer station 100 is mainly used for the transfer of coal, that is, the transfer of coal from one conveying device to another. At least one pre-crusher 12 is installed inside the pre-crusher chamber 300, and the pre-crusher 12 is mainly used for the primary crushing of hard coal. The crusher chamber 400 is installed with at least one crusher 13, and the crusher 13 is mainly used for crushing the hard coal after the primary crushing and the non-hard coal transferred from the coal blending chamber.

[0034] In the embodiment of the present application, the coal blending chamber 200 is provided with at least one hard coal blending unit 201 and at least one non-hard coal blending unit 202. Figure 1 2 shows that six hard coal blending units 201 and ten non-hard coal blending units 202 are arranged inside the coal blending chamber. The six hard coal blending units 201 are arranged continuously and adjacently along the first direction, and the ten non-hard coal blending units 202 are arranged continuously and adjacently along the first direction. Figure 1 Ten non-hard coal blending units 202 are outlined in dashed lines. Of course, the number of hard coal blending units 201 and non-hard coal blending units 202 is not limited to the number described herein, nor is their arrangement. For example, hard coal blending units 201 and non-hard coal blending units 202 may be arranged at intervals. Typically, the number of non-hard coal blending units 202 is approximately twice that of hard coal blending units 201, which can meet most coal blending needs.

[0035] In this embodiment, all hard coal blending units 201 and all non-hard coal blending units 202 are arranged in a row along a first direction, which can be a straight line. Each hard coal blending unit 201 and each non-hard coal blending unit 202 includes at least a blending chamber 200 and a weighing component 7. A valve 5, which can be a flat valve, is provided at the outlet of the blending chamber 200. The weighing component 7 is located below the valve 5.

[0036] The weighing component 7 can be a belt scale. The specifications of the belt scales for all hard coal blending units 201 and all non-hard coal blending units 202 can be the same or different. In one example, the scales in at least two of all blending units have different batching capacities. Each scale can have a different capacity based on the proportion of coal in each unit, with an accuracy of ±5%. The following specifications are available (including but not limited to): a belt scale with a 1000mm belt width, with a batching capacity of 10-100 t / h; an 800mm belt width, with a batching capacity of 4-40 t / h; and a 650mm belt width, with a batching capacity of 2-20 t / h. The belt scales can be frequency-controlled, using a variable frequency drive to adjust the belt speed and control the feed rate. If all scales have a 1000mm belt width, the batching accuracy for small coal grades below 10 t / h will not meet the required accuracy. This process equipment selection, which combines large and small batching scales of various specifications, makes coal batching more accurate, greatly improves the accuracy of coal batching, enhances the quality of coke, and reduces equipment investment costs.

[0037] The belt scale can be a variable frequency belt scale, and the running speed of the belt in the belt scale is adjustable to control the amount of material fed into the discharge conveying component below.

[0038] In an embodiment of the present application, the coal blending system also includes a first conveying component 2 and a unloading device 3. The first conveying component 2 extends along a first direction and is used to convey the coal inside the coal transfer station 100 to the hard coal blending unit 201 or the non-hard coal blending unit 202. The unloading device 3 is used to unload the coal on the first conveying component 2 to the hard coal blending unit 201 or the non-hard coal blending unit 202.

[0039] The discharge conveying component is used to convey the coal material weighed by the weighing component 7 to the subsequent workstation. The discharge conveying component can be a conveyor belt type, of course, it can also be a hopper type or other structures.

[0040] Compared with the prior art in which two conveyor belts are set in the coal blending unit, in the embodiment of the present application, the hard coal blending unit 201 and the non-hard coal blending unit 202 are arranged in a row along the first direction, that is, all the coal blending units are arranged in a single row, and only one first conveying component 2 is set above the coal blending unit to transport different types of coal in the coal transfer station 100 to the corresponding coal blending unit. The conveying equipment above the coal blending unit is reduced by half, which is also conducive to reducing the height of the feed conveyor 1, reducing dust removal equipment, and reducing civil engineering investment costs.

[0041] In one specific embodiment, the discharge conveyor assembly includes a second conveyor assembly 8 and a third conveyor assembly 9. The second conveyor assembly 8 is used to convey the hard coal material, weighed by the weighing assembly 7 of the hard coal blending unit 201, to the pre-crusher; the third conveyor assembly 9 is used to convey the non-hard coal material, weighed by the weighing assembly 7 of the non-hard coal blending unit 202, to the crusher. In this embodiment, separate conveyor assemblies are used to convey the weighed hard coal and the weighed non-hard coal, respectively. This allows for direct delivery of the hard coal and non-hard coal to different crushing locations, meeting the coal conveying requirements of the process, providing greater conveying flexibility, and facilitating the arrangement of the discharge conveyor assembly.

[0042] In a specific embodiment, the third conveying component 9 is at least partially located below the discharge port of the pre-crusher so as to convey the hard coal material crushed by the pre-crusher to the crusher; this embodiment reasonably arranges the path of the third conveying component 9, so that the hard coal crushed in one go can be conveyed to the crusher without the need for additional conveying components, which can further reduce civil engineering costs.

[0043] In a specific embodiment, the second conveying member 8 and the third conveying member 9 each include a first belt conveyor and a second belt conveyor. The first belt conveyor extends from the coal blending chamber 200 to the coal transfer station 100, and the second belt conveyor extends from the coal transfer station 100 to the pre-crusher or crusher. The coal on the first belt conveyor can fall from the end of the coal transfer station 100 to the second belt conveyor. Please refer again Figure 2 The second conveying component 8 includes a first hard coal belt conveyor 81 and a second hard coal belt conveyor 82. The first hard coal belt conveyor 81 is partially located below the hard coal blending unit 201 in the coal blending chamber 200 and partially located within the coal transfer station 100. The second hard coal belt conveyor 82 is also partially located within the coal transfer station 100. Coal from the first hard coal belt conveyor 81 can be transferred to the second hard coal belt conveyor 82. In one specific embodiment, the end of the first hard coal belt conveyor 81 located at the coal transfer station 100 is located above the corresponding end of the second hard coal belt conveyor 82. The other end of the second hard coal belt conveyor 82 extends into the pre-crusher chamber 300 to convey the coal to the pre-crusher.

[0044] The third conveying component 9 includes a first non-hard coal belt conveyor 91 and a second non-hard coal belt conveyor 92. The first non-hard coal belt conveyor 91 is located below the coal blending chamber 200 to convey the weighed non-hard coal to the coal transfer station 100. The non-hard coal on the first non-hard coal belt conveyor 91 is transferred to the second non-hard coal belt conveyor 92 at the coal transfer station 100. The second non-hard coal belt conveyor 92 passes through the pre-crusher chamber 300 and extends to the crusher chamber, so that the hard coal and non-hard coal crushed once can be conveyed to the feed port of the crusher in the crusher chamber at the same time.

[0045] This setting method has a relatively simple structure.

[0046] In one specific embodiment, the discharge point of the weighing component 7 of the hard coal blending unit 201 and the discharge point of the weighing component 7 of the non-hard coal blending unit 202 are located on different sides of the coal blending chamber 200, so that the conveying sections of the second conveying component 8 and the third conveying component 9 within the coal blending chamber 200 are at least partially staggered in the horizontal plane. This facilitates the arrangement of the second conveying component 8 and the third conveying component 9.

[0047] In one specific embodiment, each hard coal blending unit 201 and each non-hard coal blending unit 202 further includes a feeder 6 located between the coal blending chamber 200 and the weighing component 7. The feeder 6 feeds the coal in the coal blending chamber 200 into the weighing component via the feeder 6. After the valve 5 in the coal blending chamber 200 is opened, the coal in the coal blending chamber 200 falls under its own weight onto the feeder 6 and then from the feeder 6 into the weighing component, thereby improving the accuracy of the coal blending.

[0048] In one specific embodiment, the feeder 6 may be a disc feeder 6 , comprising a drive unit, a disc, and a scraper. The drive unit is used to drive the disc, and the scraper is used to scrape coal from the disc onto the weighing unit. The amount of material discharged by the disc feeder 6 is controllable, further improving the accuracy of the weighing by the weighing unit 7 . Furthermore, the discharge point of the disc feeder 6 can be flexibly configured, facilitating the arrangement of the first conveying unit 2 and the third conveying unit 9 .

[0049] Of course, the feeder 6 is not limited to the disc feeder, and can be other feeding equipment as long as it meets the use requirements.

[0050] In the above embodiments, the unloading points of the feeders 6 in all the hard coal blending units 201 are located on the first side of the feeder 6; the unloading points of the feeders 6 in all the non-hard coal blending units 202 are located on the side of the feeder 6 away from the first side, that is, the unloading points of the feeders 6 in the hard coal blending units 201 and the unloading points of the feeders 6 in the non-hard coal blending units 202 are located on different sides of the feeder 6, which facilitates the arrangement of the first conveying component 2 and the third conveying component 9. This application provides an embodiment in which the unloading points of the feeders 6 in the hard coal blending units 201 and the unloading points of the feeders 6 in the non-hard coal blending units 202 are arranged at approximately 180 degrees. Please refer to Figure 4 and Figure 5 The sections of the first hard coal belt conveyor 81 and the first non-hard coal belt conveyor 91 located inside the coal blending chamber 200 are located on the left and right sides of the coal blending chamber 200 respectively.

[0051] In the above embodiments, the unloading device can move back and forth along the first conveying component. Such an unloading device can unload all coal bunkers, simplify the system structure, and reduce the cost of using the system.

[0052] The specific structure of the unloading equipment can be found in the prior art and will not be described in detail in this article.

[0053] The specific structure of the discharge conveying component is not limited to the description herein, as long as it can realize the transportation of coal.

[0054] In the description of the embodiments of the present application, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0055] The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A coal blending system, characterized in that: include: a coal blending chamber, wherein at least one hard coal blending unit and at least one non-hard coal blending unit are disposed inside the coal blending chamber, wherein all the hard coal blending units and all the non-hard coal blending units are arranged in a row along a first direction, wherein each of the hard coal blending units and each of the non-hard coal blending units comprises at least a coal blending bin and a weighing component, wherein a valve is provided at a discharge port of the coal blending bin, and the weighing component is located below the discharge port of the coal blending bin; a first conveying member and a discharge device, wherein the first conveying member extends along the first direction and is used to convey the coal in the coal transfer station to the location of the hard coal blending unit or the non-hard coal blending unit, and the discharge device is used to unload the coal on the first conveying member from the hard coal blending unit or the non-hard coal blending unit; The discharging conveying component is used to convey the coal material weighed by the weighing component to the subsequent work station.

2. The coal blending system according to claim 1, characterized in that: The discharging conveying component includes a second conveying component and a third conveying component; The second conveying component is used to convey the hard coal material weighed by the weighing component of the hard coal blending unit to the pre-crusher; The third conveying component is used to convey the non-hard coal material weighed by the weighing component of the non-hard coal blending unit to the pulverizer.

3. The coal blending system according to claim 2, characterized in that: The third conveying member is at least partially located below the discharge port of the pre-crusher so as to convey the hard coal material crushed by the pre-crusher to the crusher; Alternatively, or / and, the second conveying component and the third conveying component both include a first belt conveyor and a second belt conveyor, the first belt conveyor extends from the coal blending chamber to the coal transfer station, the second belt conveyor extends from the coal transfer station to the pre-crusher or the crusher, and the coal material on the first belt conveyor can fall from the end located at the coal transfer station to the second belt conveyor.

4. The coal blending system according to claim 2, characterized in that: The unloading point of the weighing component of the hard coal blending unit and the unloading point of the weighing component of the non-hard coal blending unit are located on different sides of the coal blending bin, so that the conveying sections of the second conveying component and the third conveying component located inside the coal blending chamber are at least partially staggered in the horizontal plane.

5. The coal blending system according to claim 1, characterized in that: The weighing component is a belt scale, and the batching capacities of the belt scales of at least two of the hard coal blending units and all the non-hard coal blending units are different.

6. The coal blending system according to claim 1, characterized in that: The unloading device is reciprocatingly movable along the first conveying component.

7. The coal blending system according to any one of claims 1 to 6, characterized in that: All of the hard coal blending units are continuously arranged, and all of the non-hard coal blending units are continuously arranged.

8. The coal blending system according to any one of claims 1 to 6, characterized in that: Each of the hard coal blending units and each of the non-hard coal blending units further includes a feeder, which is located between the coal blending bin and the weighing component, and the coal in the coal blending bin is fed into the weighing component via the feeder.

9. The coal blending system according to claim 8, characterized in that: The feeder is a disc feeder, which includes a driving component, a disc and a scraper. The driving component is used to drive the disc to rotate, and the scraper is used to scrape the coal on the disc to the weighing component.

10. The coal blending system according to claim 9, characterized in that: The discharge points of the feeders in all the hard coal blending units are located on a first side of the feeder; and the discharge points of the feeders in all the non-hard coal blending units are located on a side of the feeder away from the first side.

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