Coal mill device

Abstract

The invention relates to the technical field of thermal power generation, in particular to a coal mill device. Wherein the boiler is arranged in the support, the separator is arranged at the top of the support, the bottom of the separator penetrates through the support to be communicated with the boiler, the first coal mill and the second coal mill are installed at the top of the separator in a spaced mode, and a discharging port of the first coal mill and a discharging port of the second coal mill are both communicated with the separator. The two ends of the pipeline system communicate with the separator and the third coal mill correspondingly, the first fan is arranged on the pipeline system, and the separator is used for screening the fine coal powder and the coarse coal powder. According to the device, the multiple coal mills are arranged to convey pulverized coal to the boiler at the same time, the pulverized coal can be conveyed to the boiler in a scattered mode, pulverized coal accumulation can be avoided, pulverized coal supply can be guaranteed even if an individual conveying system is blocked, fine pulverized coal and coarse pulverized coal are screened through the separator, and under the air supply effect of the first draught fan, the pulverized coal can be conveyed to the boiler in a scattered mode. Fine pulverized coal enters the boiler to be fully combusted, the conveying efficiency of the pulverized coal is improved, and the combustion efficiency of the boiler is improved.

Description

Technical Field

[0001] The invention relates to the technical field of thermal power generation, and in particular to a coal mill device. Background Art

[0002] In the process of thermal power generation, the coal mill is one of the most important equipment, which is responsible for grinding coal into coal powder suitable for combustion, and then transporting the coal powder to the boiler for combustion. However, due to the large amount of coal powder transported, it is easy to accumulate at the feed port of the boiler, causing blockage, backlog or leakage, thereby reducing the coal powder transportation efficiency and the combustion efficiency of the boiler.

[0003] Therefore, a coal mill device is urgently needed to solve the above technical problems. Summary of the invention

[0004] The object of the present invention is to provide a coal mill device which can improve the conveying efficiency of coal powder and improve the combustion efficiency of the boiler.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] A coal mill device comprises: a support, a boiler, a first coal mill, a second coal mill, a plurality of coal mill components and a separator, wherein the boiler is arranged in the support, the separator is arranged at the top of the support, the bottom of the separator passes through the support and is connected to the boiler, the first coal mill and the second coal mill are installed at intervals on the top of the separator, and the discharge port of the first coal mill and the discharge port of the second coal mill are both connected to the separator, the coal mill components comprise a third coal mill, a pipeline system and a first fan, the two ends of the pipeline system are respectively connected to the separator and the third coal mill, the first fan is arranged in the pipeline system, and the separator is used to screen fine coal powder and coarse coal powder.

[0007] As a preferred technical solution of the above-mentioned coal mill device, the coal mill assembly further includes a regulating valve, which is arranged in the pipeline system and is used to adjust the airflow size in the pipeline system.

[0008] As a preferred technical solution of the above-mentioned coal mill device, the coal mill device also includes a plurality of second fans, which are arranged in a one-to-one correspondence with the plurality of coal mill components, and the two ends of the second fans are respectively connected to the separator and the pipeline system.

[0009] As a preferred technical solution of the above-mentioned coal mill device, the second fan is an air ring fan.

[0010] As a preferred technical solution of the above-mentioned coal mill device, the separator includes a shell and a filter screen, the filter screen is arranged in the shell, and the filter screen is used to screen fine coal powder and coarse coal powder.

[0011] As a preferred technical solution of the above-mentioned coal mill device, the coal mill device also includes a dust collector, which is arranged on the shell and is used to remove pollutants in the boiler.

[0012] As a preferred technical solution of the above-mentioned coal mill device, the coal mill device also includes an induced draft fan, which is arranged in the dust collector and is used to provide negative pressure for the dust collector.

[0013] As a preferred technical solution of the above-mentioned coal mill device, the coal mill device also includes an exhaust duct, and the exhaust duct is connected to the exhaust end of the induced draft fan.

[0014] As a preferred technical solution of the above-mentioned coal mill device, the coal mill device also includes a steam boiler, which is connected to the boiler through the separator and is used to store steam.

[0015] As a preferred technical solution of the above-mentioned coal mill device, the coal mill device further includes a steam pipe, one end of which is connected to the steam furnace, and the other end of which passes through the separator and is connected to the boiler.

[0016] Beneficial effects of the present invention:

[0017] The present invention provides a coal mill device. The coal mill device comprises: a support, a boiler, a first coal mill, a second coal mill, a plurality of coal mill components and a separator, wherein the boiler is arranged in the support, the separator is arranged on the top of the support, the bottom of the separator passes through the support and is connected to the boiler, the first coal mill and the second coal mill are installed at intervals on the top of the separator, and the discharge port of the first coal mill and the discharge port of the second coal mill are both connected to the separator, the coal mill components comprise a third coal mill, a pipeline system and a first fan, the two ends of the pipeline system are respectively connected to the separator and the third coal mill, the first fan is arranged in the pipeline system, and the separator is used to screen fine coal powder and coarse coal powder. The device conveys pulverized coal to the boiler at the same time by arranging a first coal mill, a second coal mill and several third coal mills, so that pulverized coal can be conveyed to the boiler in a dispersed manner, and pulverized coal can be avoided from accumulating. Even if an individual conveying system is blocked, the supply of pulverized coal can be guaranteed. The separator screens the fine pulverized coal and the coarse pulverized coal, and the fine pulverized coal is brought into the boiler for full combustion under the air supply of the first fan, thereby improving the pulverized coal conveying efficiency and the combustion efficiency of the boiler. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0019] Figure 1 A first structural schematic diagram of a coal mill device provided in an embodiment of the present invention;

[0020] Figure 2 for Figure 1 A partial enlarged view of middle A;

[0021] Figure 3 A second structural schematic diagram of a coal mill device provided in an embodiment of the present invention;

[0022] Figure 4 This is a third structural schematic diagram of the coal pulverizer device provided in an embodiment of the present invention.

[0023] In the figure:

[0024] 1. Bracket; 2. Protective cover; 3. Boiler; 4. First coal mill; 5. Second coal mill; 6. Third coal mill; 7. First fan; 8. Pipeline system; 9. Control valve; 10. Separator; 11. Second fan; 12. Filter; 13. Dust collector; 14. Draft fan; 15. Exhaust duct; 16. Steam pipe; 17. Steam boiler. DETAILED DESCRIPTION

[0025] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0026] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0028] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0029] like Figures 1 to 4 As shown, the present invention provides a coal mill device. The coal mill device includes: a bracket 1, a boiler 3, a first coal mill 4, a second coal mill 5, a plurality of coal mill components and a separator 10. Specifically, the boiler 3 is arranged in the bracket 1, the separator 10 is arranged on the top of the bracket 1, the bottom of the separator 10 passes through the bracket 1 and is connected to the boiler 3, the first coal mill 4 and the second coal mill 5 are installed at intervals on the top of the separator 10, and the discharge port of the first coal mill 4 and the discharge port of the second coal mill 5 are both connected to the separator 10, the coal mill components include a third coal mill 6, a pipeline system 8 and a first fan 7, the two ends of the pipeline system 8 are respectively connected to the separator 10 and the third coal mill 6, the first fan 7 is arranged in the pipeline system 8, and the separator 10 is used to screen fine coal powder and coarse coal powder. The device simultaneously conveys pulverized coal to the boiler 3 by arranging a first coal mill 4, a second coal mill 5 and a plurality of third coal mills 6, so that pulverized coal can be conveyed to the boiler 3 in a dispersed manner, and accumulation of pulverized coal can be avoided. Even if an individual conveying system is blocked, the supply of pulverized coal can be guaranteed. The separator 10 screens the fine pulverized coal and the coarse pulverized coal, and the fine pulverized coal is brought into the boiler 3 for full combustion under the air supply of the first fan 7, thereby improving the pulverized coal conveying efficiency and the combustion efficiency of the boiler 3.

[0030] Furthermore, in this embodiment, the coal mill device is provided with three coal milling assemblies, the internal bottom of the bracket 1 is embedded with a boiler 3, a first coal mill 4 is installed on one side of the top of the bracket 1, a second coal mill 5 is installed on one side of the first coal mill 4, a first third coal mill 6 is installed on the top of the second coal mill 5, a second third coal mill 6 is installed on one side of the first third coal mill 6, and a third third coal mill 6 is installed on the top of the second third coal mill 6, which can save installation space. When the coal mill device is working, each coal mill is started in turn according to a preset start-up sequence, so that each coal mill alternately supplies coal, which can ensure the supply of coal powder and avoid coal powder accumulation. Of course, in some other embodiments, the number and setting method of the coal mill are determined according to actual conditions, which will not be repeated here.

[0031] Optionally, the coal mill device further includes a protective cover 2, which covers the first coal mill 4 and the second coal mill 5 inside the protective cover 2 to prevent the first coal mill 4 and the second coal mill 5 from being damaged.

[0032] Optionally, the coal grinding assembly further includes a regulating valve 9, which is disposed in the pipeline system 8 and is used to adjust the airflow in the pipeline system 8. The regulating valve 9 adjusts the air volume as required to ensure stable transportation of coal powder.

[0033] Optionally, the coal mill device further includes a plurality of second fans 11, which are arranged one by one with the plurality of coal mill components, and the two ends of the second fans 11 are respectively connected to the separator 10 and the pipeline system 8, which can improve the coal powder conveying efficiency. Further, the second fans 11 are air ring fans.

[0034] Optionally, the separator 10 includes a housing and a filter 12, the filter 12 is disposed in the housing, and the filter 12 is used to screen the fine coal powder and the coarse coal powder. Specifically, before the coal powder enters the boiler 3, it will first pass through the separator 10 for separation. The separator 10 uses the airflow generated by the second fan 11 and the filter 12 to separate the qualified fine coal powder from the coarse coal powder or impurities. The qualified fine coal powder is further transported to the boiler 3 for combustion, while the coarse coal powder or impurities are recovered or processed to improve the combustion efficiency of the boiler 3.

[0035] Optionally, the coal mill device also includes a dust collector 13, which is arranged in the shell. The dust collector 13 is used to remove pollutants in the boiler 3, and can effectively remove particulate matter and other pollutants in the flue gas of the boiler 3, reduce the emission concentration of the flue gas, and reduce pollution to the environment.

[0036] Furthermore, the coal mill device further includes an induced draft fan 14, which is disposed on the dust collector 13 and is used to provide negative pressure for the dust collector 13, so as to suck out particulate matter and other pollutants in the boiler 3. Further, the coal mill device further includes an exhaust pipe 15, which is connected to the exhaust end of the induced draft fan 14 and can discharge particulate matter and other pollutants.

[0037] Optionally, the coal mill device further includes a steam furnace 17, which is connected to the boiler 3 through the separator 10, and the steam furnace 17 is used to store steam; the coal mill device further includes a steam pipe 16, one end of which is connected to the steam furnace 17, and the other end of which is connected to the boiler 3 through the separator 10. Specifically, the thermal energy generated by the combustion of coal powder in the boiler 3 can be efficiently converted into steam energy, and the steam pipe 16, as a medium for heat energy transmission, quickly transports high-temperature and high-pressure steam to the steam furnace 17, thereby realizing long-distance transmission and efficient utilization of heat energy, reducing the loss of heat energy during transmission, and improving the energy utilization efficiency of the entire system.

[0038] In addition, the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A coal mill device, characterized in that: include: A support (1), a boiler (3), a first coal mill (4), a second coal mill (5), a plurality of coal milling components and a separator (10), wherein the boiler (3) is arranged in the support (1), the separator (10) is arranged at the top of the support (1), the bottom of the separator (10) passes through the support (1) and is communicated with the boiler (3), the first coal mill (4) and the second coal mill (5) are installed at intervals on the top of the separator (10), and the discharge port of the first coal mill (4) and the discharge port of the second coal mill (5) are both communicated with the separator (10), the coal milling components include a third coal mill (6), a pipeline system (8) and a first fan (7), the two ends of the pipeline system (8) are respectively communicated with the separator (10) and the third coal mill (6), the first fan (7) is arranged in the pipeline system (8), and the separator (10) is used for screening fine coal powder and coarse coal powder.

2. A coal mill device according to claim 1, characterized in that: The coal grinding assembly further comprises a regulating valve (9), which is arranged in the pipeline system (8) and is used to adjust the size of the airflow in the pipeline system (8).

3. A coal mill device according to claim 1, characterized in that: The coal mill device further comprises a plurality of second fans (11), the plurality of second fans (11) being arranged in one-to-one correspondence with the plurality of coal mill components, and the two ends of the second fans (11) being respectively connected to the separator (10) and the pipeline system (8).

4. A coal mill device according to claim 3, characterized in that: The second fan (11) is an air ring fan.

5. A coal mill device according to claim 1, characterized in that: The separator (10) comprises a shell and a filter screen (12), wherein the filter screen (12) is arranged in the shell, and the filter screen (12) is used to screen fine coal powder and coarse coal powder.

6. A coal mill device according to claim 5, characterized in that: The coal mill device further comprises a dust collector (13), wherein the dust collector (13) is arranged on the shell, and the dust collector (13) is used to remove pollutants in the boiler (3).

7. A coal mill device according to claim 6, characterized in that: The coal mill device further comprises an induced draft fan (14), wherein the induced draft fan (14) is arranged on the dust collector (13), and the induced draft fan (14) is used to provide negative pressure for the dust collector (13).

8. A coal mill device according to claim 7, characterized in that: The coal mill device further comprises an exhaust pipe (15), wherein the exhaust pipe (15) is connected to the exhaust end of the induced draft fan (14).

9. A coal mill device according to any one of claims 1 to 8, characterized in that: The coal mill device further comprises a steam boiler (17), wherein the steam boiler (17) is connected to the boiler (3) through the separator (10), and the steam boiler (17) is used to store steam.

10. A coal mill device according to claim 9, characterized in that: The coal mill device further comprises a steam pipe (16), one end of which is connected to the steam furnace (17), and the other end of which passes through the separator (10) and is connected to the boiler (3).

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