CN110320881B - Wisdom fuel system of thermal power factory - Google Patents
Wisdom fuel system of thermal power factory Download PDFInfo
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Abstract
The invention discloses an intelligent fuel system of a thermal power plant, which comprises a coal information pre-acquisition system, a coal type component analysis unit, coal storage and taking equipment and a coal storage and taking control system unit; the incoming coal information pre-acquisition system transmits coal information to the coal storage and retrieval control system unit; the coal type component analysis unit analyzes the components of the incoming coal, transmits the component analysis result to the coal access control system unit and checks the coal type information; the access coal control system unit determines the proportioning information of various incoming coals and the coal stacking area and the laying thickness of the incoming coal types, and controls the access coal equipment to stack the incoming coals in the coal stacking area in a horizontal direction according to the laying thickness of the current coal types so that the various incoming coals form a sandwich layered coal stacking structure; controlling the coal storage and taking equipment to set the coal taking thickness to take coal in a coal piling area; the coal yard can automatically determine the coal storage and retrieval area, automatically store and retrieve coal and automatically mix coal, the automation and the refinement of the coal yard management are realized, and the requirement of a thermal power plant on intelligent operation is met.
Description
Technical Field
The present disclosure relates to a fuel system operation and management system of a thermal power plant, and particularly relates to a smart fuel system of a thermal power plant.
Background
Most thermal power plants generate electricity by using coal as fuel, a large amount of coal needs to be consumed every day, especially for large coal-fired generating sets, the consumption of the coal is thousands of tons every day, and in order to ensure the normal operation of the power plants, the coal storage amount needs to be maintained for about 15 days, so that the coal storage amount of a coal yard is huge, and tens of thousands to tens of thousands of tons are frequently generated. The coal supply of the thermal power plant has the characteristics of multiple supply channels and variable coal types, and the coal-fired boiler has different requirements on the coal types in different operation stages, such as ignition, low-load operation, high-load operation and the like. On one hand, the coal storage capacity of the coal yard is huge, daily storage and coal taking are frequent, and on the other hand, the types of coal are multiple, and the requirements on the types of coal are variable, so that the management and operation of the coal yard to the coal become a difficult and complex work.
The conventional coal yard stores coal by adopting the regional stacking, namely, fixed coal is stored in a certain region, and the coal is taken from the fixed region according to the operation requirement. The coal storage area and the coal taking area are judged and operated manually by coal yard operators according to the operation condition of a generator set in the coal storage/taking process, the operation management mode of the coal yard is rough, the requirement of a modern thermal power plant on intelligent operation cannot be met, and particularly, when the stored coal types on the site are more and the newly-fed coal types are different from the originally-stored coal types, the problem of excessive stacked coal piles is caused, and the problem of difficult coal yard management becomes more prominent.
Under normal conditions, the coal types stored in the coal yard of the power plant are usually more than 3-4, the coal types which can be obtained by the power plant can change along with the change of the coal supply market, and the requirements of the coal-fired unit on the coal types are different in different operation stages, for example, in the ignition stage, the volatile components of the coal are required to be high, the coal types are easy to catch fire, so that the coal yard can be adjusted at any time according to the operation condition of the unit, and the proper coal types are provided according to the operation condition. According to the foregoing, coal in a traditional coal yard is stacked in different areas, so that an operator can only take coal according to the coal types stored in the existing place, and simply mix and match the coal by using temporary storage devices in the coal conveying process such as silos and underground coal ditches, and cannot complete the coal blending task matching with the operation condition, so that the requirements of economic and safe operation of a unit on the coal types are difficult to achieve in many cases.
Disclosure of Invention
The present disclosure aims to overcome the above disadvantages of the prior art and provide an intelligent fuel system for a thermal power plant; the system adopts layered stacking to the coal piling mode of the coal yard, utilizes a layered coal piling structure similar to a sandwich structure, directly completes the first blending in the coal piling process, directly takes the blended coal blending layer into the furnace for secondary blending combustion during coal taking, and meets the requirement of the generator set on the optimal matching of the required fuel components.
The invention aims to provide an intelligent fuel system of a thermal power plant, which adopts the following technical scheme for achieving the aim:
an intelligent fuel system of a thermal power plant comprises a coal information pre-acquisition system, a coal type component analysis unit, coal storage and taking equipment and a coal storage and taking control system unit;
the coming coal information pre-acquisition system inputs coal type information of coming coal and transmits the coal type information to the coal access control system unit;
the coal type component analysis unit analyzes the components of the incoming coal, transmits the component analysis result to the coal access control system unit and checks the coal type information;
the coal storage and retrieval control system unit determines the proportioning information of various incoming coals and the coal piling region and the laying thickness of each incoming coal type, and controls the coal storage and retrieval equipment to pile the coals in the horizontal direction in the coal piling region according to the laying thickness of the current coal type, so that the various incoming coals form a sandwich layered coal piling structure to finish coal piling; and controlling the coal storing and taking equipment to set the coal taking thickness to take coal in the coal piling area.
As a further technical solution, if the component analysis result of the coal component analysis unit does not match the coal information, the mismatch information of the coming coal is stored in the access coal control system unit.
As a further technical scheme, the sandwich layered coal piling structure comprises at least one layer of vertically arranged coal mixing proportioning layer, and the coal mixing proportioning layer is formed by stacking a plurality of layers of coal.
As a further technical scheme, when the sandwich layered coal piling structure comprises a plurality of layers of coal mixing proportioning layers, the coal storing and taking control system unit controls the coal storing and taking equipment to complete coal piling of the current coal mixing proportioning layer, and then coal piling of the next coal mixing proportioning layer is performed.
As a further technical scheme, the thickness of the mixed coal proportioning layer is smaller than the thickness of a desirable coal layer of the coal storing and taking device in one-time operation.
As a further technical scheme, when coal is taken by a coal storing and taking device, the coal is taken according to the thickness of a coal mixing proportioning layer; if the sandwich layered coal piling structure comprises a plurality of layers of coal blending proportioning layers, after the coal taking of the current coal blending proportioning layer is finished, the coal of the next coal blending proportioning layer is taken.
According to the further technical scheme, when the coal storage and taking device is used for storing and taking the piled coal, the laying thickness of the current coal seam is determined according to the running speed of the coal storage and taking device, the thickness of the current coal seam and the position where the coal laying is finished are stored in the coal storage and taking control system unit after the coal storage and taking device is paved with the coal piling area, and if the coal piling area is not paved with the current coal seam in the horizontal direction, the coal storage and taking device continues to finish the coal laying task of the coal piling area from the position where the coal laying is finished last time when the coal is next.
As a further technical scheme, the intelligent fuel system further comprises a positioning unit, the positioning unit is arranged on the coal storage and taking equipment, the positioning unit is used for positioning the position of the coal storage and taking equipment and transmitting the position information of the coal storage and taking equipment to the coal storage and taking control system unit.
As a further technical scheme, the fuel system further comprises a coal conveying device, wherein the coal conveying device comprises a coal storing and conveying device and a coal fetching and conveying device, the coal storing and conveying device is arranged between the coal unloading yard and the coal storing and taking device, and is used for conveying coal from the coal unloading yard to the coal storing and taking device; the coal taking and conveying equipment is arranged between the coal storing and taking equipment and the raw coal bin and conveys coal from the coal storing and taking equipment to the raw coal bin.
As a further technical scheme, the coal storing and taking device is a bucket wheel machine.
The beneficial effect of this disclosure does:
the intelligent fuel system of the thermal power plant can realize intelligent management of coal storage/retrieval in a coal yard, can carry out proportioning and laying through layering and layering thickness in the coal storage process according to the coal types of the coal and the requirements of economic and safe operation of a thermal generator set on the coal types, so that coal piles form a coal blending proportioning layer with a sandwich layered structure, and the primary blending process is completed.
The intelligent fuel system of the thermal power plant disclosed by the invention utilizes the coal storing and taking equipment to take a complete mixed coal proportioning layer at one time in the coal taking process so as to meet the requirement of the optimal operation working condition of the coal-fired unit on the mixed coal components. Meanwhile, the intelligent fuel system of the thermal power plant can realize the functions of automatically determining coal storage/taking areas, automatically storing/taking coal and automatically mixing coal, realizes automation and refinement of coal yard management, provides a perfect solution for safe and economic operation of the thermal power plant, and provides a quantitative basis for a coal purchasing link.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
FIG. 1 is a schematic plan view of coal pile;
FIG. 2 is a schematic cross-sectional view of a sandwich layered coal pile structure;
FIG. 3 is a schematic diagram of a coal fetching process of the coal storing and taking device;
in the figure, 1, a bucket wheel machine, 2, a coal storing and taking control system unit, 3, a main coal mixing ratio layer I coal piling area, 4, a positioning unit, 5, a coal conveying belt, 6, a secondary coal mixing ratio layer II coal piling area, 7, a secondary coal mixing ratio layer III coal piling area, 8, A coming coal type, 9, B coming coal type, 10, C coming coal type and 11, a coal mixing ratio layer.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an", and/or "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;
for convenience of description, the words "up", "down", "left" and "right" in this disclosure, if any, merely indicate correspondence with up, down, left and right directions of the drawings themselves, and do not limit the structure, but merely facilitate description of the disclosure and simplify description, rather than indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the disclosure.
As introduced in the background art, the inventor finds that a traditional coal yard coal material management mode cannot complete a coal blending task consistent with an operation condition, and is difficult to meet the requirements of economic and safe operation of a unit on coal types.
The application provides an intelligent fuel system of a thermal power plant, which comprises a coal information pre-acquisition system, a coal type component analysis unit, coal storage and taking equipment and a coal storage and taking control system unit;
the coming coal information pre-acquisition system inputs coal type information of coming coal and transmits the coal type information to the coal access control system unit;
the coal type component analysis unit analyzes the components of the incoming coal, transmits the component analysis result to the coal access control system unit and checks the coal type information;
the coal storage and retrieval control system unit determines the proportioning information of various incoming coals and the coal piling region and the laying thickness of each incoming coal type, and controls the coal storage and retrieval equipment to pile the coals in the horizontal direction in the coal piling region according to the laying thickness of the current coal type, so that the various incoming coals form a sandwich layered coal piling structure to finish coal piling; and controlling the coal storing and taking equipment to set the coal taking thickness to take coal in the coal piling area.
Example 1
The fuel system disclosed in the present embodiment will be further described with reference to fig. 1 to 3;
referring to fig. 1, the intelligent fuel system of the thermal power plant includes a coal information pre-collection system, a coal type component analysis unit, a coal unloader, a coal storage and retrieval device, a coal conveying device, a positioning unit, and a coal storage and retrieval control system unit 2.
The incoming coal information pre-acquisition system inputs the coal type information of the incoming coal and transmits the coal type information to the coal access control system unit 2. The coal type information is the composition information of the coal supplied by a coal supplier, and the information is recorded and stored in the coal access control system unit 2 by a coal information pre-acquisition system as the basic data of coal blending, and can be manually recorded.
The coal type component analysis unit analyzes the components of the incoming coal, transmits the component analysis results to the coal access control system unit, and checks the coal type information input by the incoming coal information pre-acquisition system, so that the accuracy of the incoming coal information pre-acquisition system is improved; the coal type component analysis unit adopts the existing chemical analysis system and is used for carrying out component analysis on the coal type so as to check whether the coal type information input by the coal information pre-acquisition system is matched or not.
The coal unloader is responsible for unloading coal from the transport vehicle;
in the embodiment, the coal storing and taking device adopts a bucket wheel machine 1, the bucket wheel machine 1 is responsible for taking and storing coal, the coal conveying device adopts a coal conveying belt 5, the coal conveying belt 5 is responsible for conveying the coal from a coal unloading field to the bucket wheel machine 1 when the coal is stored, and is responsible for conveying the coal from the bucket wheel machine 1 to a raw coal bunker of a power plant when the coal is taken;
The coal storing and taking control system unit 2 is responsible for controlling the operation of the bucket wheel machine 1, including the operation direction and operation speed of the bucket wheel machine, the coal storing/taking speed, angle, position height and the like of the bucket wheel machine.
The coal storing and taking control system unit 2 performs proportioning on various incoming coals according to the coal type information of the incoming coal information pre-acquisition system and the requirements of the coal-fired unit of the power plant on the coal type components under various operating conditions, determines the storage area and the laying thickness of the coal type, and controls the bucket wheel machine to lay the coal bed according to the thickness requirement.
In the coal storage process of the bucket wheel machine 1, according to the instruction of the coal storage and retrieval control system unit 2, stacking coal according to layers, namely, paving certain coal received by a coal yard according to the coal seam thickness determined by the coal storage and retrieval control system unit 2 in the horizontal direction, paving all the coal in corresponding coal storage areas layer by layer, and finally forming a sandwich layered coal stacking structure.
The thickness of each layer of coal in the sandwich layered coal piling structure is determined by the coal storing and taking control system unit according to the requirement of final coal blending, and finally the bucket wheel machine is controlled to realize the thickness. The thickness of each coal layer in the sandwich layered coal piling structure is determined by the operation speed of the bucket wheel machine and the rotating speed of the coal bucket and the coal conveying belt. After the coal thickness is determined, the coal storage and retrieval control system unit 2 controls the operation speed of the bucket wheel machine 1 and the rotation speed of the coal bucket and the coal conveying belt, and further controls the coal storage area to lay coal with the set thickness. After the coal is paved, the thickness of the coal and the position where the coal paving is finished are stored in the coal storing and taking control system unit 2; if the coal piling area is not fully paved in the horizontal direction of the current coal type, when the next coal comes from the coal type, the coal storing and taking control system unit 2 controls the bucket wheel machine 1 to continuously pave the coal from the position where the last coal paving is finished until the coal paving thickness and the coal paving amount determined by the coal storing and taking control system unit are reached, and the coal paving task of the coal piling area is completed.
Each coal type is laid in a coal storage area to form a coal type layer, a plurality of coal type layers form a complete coal mixing proportioning layer, and the coal mixing proportioning layer forms coal mixing of coal type components required by a coal-fired unit in the coal taking process; the sandwich layered coal piling structure can be composed of one complete coal mixing proportioning layer or a plurality of complete coal mixing proportioning layers.
The complete mixed coal proportioning layer can be composed of two layers of different coal types, and can also be composed of a plurality of layers of different coal types.
The thickness of the complete mixed coal proportioning layer is determined by the diameter of the bucket wheel machine, and the thickness is not more than the thickness of the coal bed which can be taken by the bucket wheel machine to ensure that the bucket wheel machine can run once to take the complete mixed coal proportioning layer when taking coal.
The height position of the bucket wheel machine coal bucket can be determined by the coal storing and taking control system unit 2, after the height of the bucket wheel machine coal bucket is determined, the thickness of coal which can be taken by the bucket wheel machine is immediately determined, the thickness of a complete mixed coal proportioning layer is set to be not more than the thickness of a coal bed which can be taken by the bucket wheel machine, the bucket wheel machine can take the complete mixed coal proportioning layer away after the bucket wheel machine operates at the current height once, and the mixed coal proportioning layer is sent to a raw coal bunker of a power plant through a coal conveying belt 5. The one-time operation of the bucket wheel machine refers to flat-layer operation at a set height.
The bucket wheel diameter of bucket wheel machine 1 is saved in access coal control system unit 2, can confirm the maximum thickness on a complete coal mixture ratio layer by the bucket wheel diameter of bucket wheel machine 1, and access coal control system unit 2 can confirm the ratio relation of corresponding multiple coal of coming according to the requirement of thermal power generation unit to the coal blending, and then can confirm the thickness in each coal seam by the thickness on a complete coal mixture ratio layer.
The coal taking thickness of the bucket wheel machine is a complete coal mixing proportioning layer in a sandwich layered structure, so that the coal mixing formed by the taken coal can meet the requirements of the optimal operation working condition of the unit on the coal mixing components.
If the sandwich layered coal piling structure comprises a plurality of layers of coal mixing proportioning layers, coal is taken according to the thickness of the coal mixing proportioning layers when coal taking equipment takes coal; and after the coal is taken out from the current coal blending ratio layer, taking out the coal of the next coal blending ratio layer.
The technical solution of the present disclosure will be described in detail with reference to specific examples.
As shown in fig. 1, after receiving coal in a coal yard, the incoming coal information pre-collection system records and transmits coal type information of the incoming coal to the coal access control system unit 2; the coal type component analysis unit (not shown in the figure) performs component analysis on the coal type and transmits the analysis result to the coal access control system unit 2, and the coal access control system unit 2 determines the stacking area of the coal type in the coal yard and the coal seam thickness during coal stacking according to the coal type information data input by the coal information pre-acquisition system and the requirement of the thermal power generation unit on coal blending.
The coal is delivered into the bucket wheel machine 1 through a coal conveyor belt 5 after passing through a coal unloader; the bucket wheel machine 1 determines the operation state of the bucket wheel machine according to the control instruction from the coal storage and retrieval control system unit 2, including the parameters of the bucket wheel machine such as the operation direction, the operation speed, the coal storage/retrieval speed, the angle, the position height and the like, and finishes the laying of the coal in the coal piling process; meanwhile, the position of the bucket wheel machine 1 is accurately determined by the positioning unit 4, and the positioning unit 4 transmits positioning information to the coal storage and retrieval control system unit 2 at any time.
As shown in fig. 1, the whole coal yard is divided into three coal piling regions, namely a main coal blending ratio layer I coal piling region 3, a sub coal blending ratio layer II coal piling region 6 and a sub coal blending ratio layer III coal piling region 7, wherein the number and size of the coal piling regions are determined according to the actual operation requirements of the thermal power plant; the kind of coal blending stored in each area is set by the coal storage and retrieval control system unit 2, and the coal storage and retrieval control system unit 2 controls the bucket wheel machine 1 to store the coal in the set area. The coal pile of each coal pile area is formed by one or a plurality of coal mixture proportioning layers 11 from bottom to top, each coal mixture proportioning layer 11 can be formed by a plurality of coal types, and the coal type of each coal mixture proportioning layer 11 is determined by the coal storing and taking control system unit 2 according to the unit operation requirement. FIG. 2 is a schematic cross-sectional view of a sandwich layered coal pile structure composed of two coal blending ratio layers 11, wherein each coal blending ratio layer is composed of a source coal type 8, a source coal type 9 and a source coal type 10. When the coal seam is specifically paved, the paving thickness determined by the coal storing and taking control system unit 2 is paved in the coal piling area by the bucket wheel machine 1. During paving, the paving thickness of the current coal type can be determined by the operation speed of the bucket wheel machine and the rotating speed of the coal bucket, the thickness of the paved coal layer and the position of the coal paving end are stored in the coal storing and taking control system unit 2, if the coal piling area is not fully paved in the horizontal direction of the current coal type, the coal storing and taking control system unit 2 controls the bucket wheel machine 1 to continuously complete the coal paving task of the coal storing area from the position of the last coal paving end when the next coal type comes. If a plurality of coal blending ratio layers for coal stacking are preset in the coal stacking area, coal paving of the next coal blending ratio layer is carried out after coal paving of the current coal blending ratio layer is finished. And taking the coal in the same way when taking the coal, and taking the coal of the next mixed coal proportioning layer after the bucket wheel machine finishes taking the coal from the current mixed coal proportioning layer.
After the coal types are stored, the coal storage information of each area is stored in the coal storage and retrieval control system unit 2, and during subsequent coal retrieval, the coal storage and retrieval control system unit 2 controls the bucket wheel machine to retrieve coal in the corresponding area according to the requirement of required coal blending. As shown in FIG. 3, when the bucket wheel machine fetches coal, the coal fetching thickness is the thickness of a complete coal blending layer according to the height sequence of the complete coal blending layer, namely, the coal blending ratio fetched by the bucket wheel machine meets the set ratio during coal storage in the coal fetching process. Because the coal taking thickness of the bucket wheel machine is a complete coal mixing proportioning layer in the sandwich layered coal piling structure, the coal mixing formed by the taken coal can meet the requirement of the preset optimal operation working condition of the unit on the coal mixing components. The coal taken out by the bucket wheel machine is sent into a raw coal bunker through a coal conveying belt, and is sent to different coal pulverizing systems for secondary blending combustion in the furnace, so as to meet the operation requirement of a coal-fired unit.
Although the present disclosure has been described with reference to specific embodiments, it should be understood that the scope of the present disclosure is not limited thereto, and those skilled in the art will appreciate that various modifications and changes can be made without departing from the spirit and scope of the present disclosure.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (8)
1. An intelligent fuel system of a thermal power plant is characterized by comprising a coal information pre-acquisition system, a coal type component analysis unit, coal storage and taking equipment and a coal storage and taking control system unit;
the coming coal information pre-acquisition system inputs coal type information of coming coal and transmits the coal type information to the coal access control system unit;
the coal type component analysis unit analyzes the components of the incoming coal, transmits the component analysis result to the coal access control system unit and checks the coal type information;
the coal storage and retrieval control system unit determines the proportioning information of various incoming coals and the coal piling region and the laying thickness of each incoming coal type, and controls the coal storage and retrieval equipment to pile the coals in the horizontal direction in the coal piling region according to the laying thickness of the current coal type, so that the various incoming coals form a sandwich layered coal piling structure to finish coal piling; controlling the coal storage and taking equipment to set the coal taking thickness to take coal in the coal piling area;
the sandwich layered coal piling structure comprises at least one layer of vertically arranged coal mixing proportioning layer, and the coal mixing proportioning layer is formed by stacking a plurality of layers of coal sources; when the coal is taken by the coal storage and taking equipment, taking coal according to the thickness of the mixed coal proportioning layer; if the sandwich layered coal piling structure comprises a plurality of layers of coal blending proportioning layers, after the coal taking of the current coal blending proportioning layer is finished, the coal of the next coal blending proportioning layer is taken.
2. The intelligent fuel system of a thermal power plant according to claim 1, wherein if the composition analysis result of the coal composition analysis unit does not match the coal information, the mismatch information of the coming coal is stored in the access coal control system unit.
3. The intelligent fuel system of a thermal power plant as claimed in claim 1, wherein when the sandwich layered coal stacking structure includes a plurality of coal blending ratio layers, the coal access control system unit controls the coal access device to complete coal stacking of the current coal blending ratio layer, and then coal stacking of the next coal blending ratio layer is performed.
4. The intelligent fuel system of a thermal power plant according to claim 1, wherein the thickness of the coal blending ratio layer is smaller than the thickness of a coal layer which can be obtained by one-time operation of the coal access equipment.
5. The intelligent fuel system of a thermal power plant according to claim 1, wherein when the coal storage and retrieval equipment deposits the coal, the thickness of the current coal layer and the position of the coal deposit end are determined by the operation speed of the coal storage and retrieval equipment, the thickness of the current coal layer after the coal deposit and the position of the coal deposit end are stored in the coal storage and retrieval control system unit, and if the coal deposit area is not fully paved with the current coal in the horizontal direction, the coal storage and retrieval equipment continues to complete the coal deposit task of the coal deposit area from the position of the last coal deposit end when the next coal deposit of the current coal is started.
6. The intelligent fuel system of a thermal power plant according to claim 1, further comprising a positioning unit, wherein the positioning unit is disposed at the coal storage and retrieval equipment, and the positioning unit positions the coal storage and retrieval equipment and transmits the position information of the coal storage and retrieval equipment to the coal storage and retrieval control system unit.
7. The intelligent fuel system of the thermal power plant according to claim 1, further comprising a coal conveying device, wherein the coal conveying device comprises a coal storage and conveying device and a coal fetching and conveying device, the coal storage and conveying device is arranged between the coal unloading yard and the coal storing and taking device, and conveys coal from the coal unloading yard to the coal storing and taking device; the coal taking and conveying equipment is arranged between the coal storing and taking equipment and the raw coal bin and conveys coal from the coal storing and taking equipment to the raw coal bin.
8. The intelligent fuel system of a thermal power plant as claimed in claim 1, wherein the coal storage and retrieval equipment is a bucket wheel machine.
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| CN111453450A (en) * | 2020-05-18 | 2020-07-28 | 北京能为科技股份有限公司 | Intelligent blending and stacking device and method for fire coal |
| CN112637246A (en) * | 2021-01-14 | 2021-04-09 | 山西太钢不锈钢股份有限公司 | Method for intelligently encoding and transmitting coal type information of coking coal sampling control system |
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