Coal grinding device for thermal power plant

Abstract

The invention relates to the technical field of coal mills, in particular to a coal milling device for a thermal power plant, which comprises a coal milling assembly including a mounting part, a driving part arranged on the mounting part, a pressing part arranged on the mounting part, a material distributing part arranged on the mounting part, and a guide part arranged on the material distributing part; the adjusting assembly comprises a rotating piece arranged on the downward pressing piece and a pushing piece arranged on the downward pressing piece; and the conveying assembly comprises a collecting piece arranged on the mounting piece and a conveying piece arranged on the collecting piece. The coal briquettes are screened through the material distributing piece and are subjected to graded grinding, it is ensured that the coal briquettes with different granularities reach the needed fineness in the respective grinding stages, unnecessary excessive grinding is reduced, the rotating piece drives the pushing piece to enable the grinding roller to achieve angle adjustment, the fineness uniformity of pulverized coal and the coal grinding efficiency are improved, and the coal grinding efficiency is improved. And the collecting piece is used for collecting coal briquettes which jump out during coal grinding and are not fully ground, and secondary grinding is carried out again, so that the quality of pulverized coal is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of coal mills, and particularly to a coal grinding device for thermal power plants. Background Art

[0002] The coal mill for thermal power plants is an industrial device. There are various types of coal mills used in thermal power plants, including low-speed coal mills, medium-speed coal mills, and high-speed coal mills. Different types of coal mills are suitable for different coal types and boiler designs. The coal mill is specifically used to grind coal blocks or coal particles into fine coal powder suitable for boiler combustion. This equipment is crucial for thermal power plants because their main function is to convert coal into heat energy, and then generate steam to drive turbines for power generation. Coal mills are an essential part of thermal power plants, and they directly affect the operation efficiency, economy, and environmental impact of the power plant.

[0003] In the medium-speed vertical coal mill used in reality, coal blocks first enter the coal mill through the feeding system, and then the grinding components grind the coal blocks. At the same time, hot air is sent into the coal mill through the hot air system, which plays the role of drying the coal powder and conveying it. However, during the grinding process of traditional coal mills, due to the different sizes of coal blocks, large coal blocks require more time and energy to grind, which may cause excessive wear of the coal mill. Moreover, due to factors such as the gap between the grinding roller and the grinding disc and the wear degree of the grinding roller, the fineness of the coal powder is often uneven, affecting the combustion efficiency. In addition, when grinding coal, there may be coal blocks that bounce out or are not fully ground. Existing coal mills are difficult to automatically grind these coal blocks for a second time. If the coal blocks that are not fully ground are directly used for combustion, it will lead to incomplete combustion and cause energy waste. Summary of the Invention

[0004] The purpose of this part is to outline some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. In this part, as well as in the abstract and title of the specification of this application, some simplifications or omissions may be made to avoid obscuring the purpose of this part, the abstract, and the title of the invention. However, such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] In view of the problems that the different sizes of coal blocks may cause excessive wear of the coal mill, uneven fineness of the coal powder, and difficulty in automatically grinding the coal blocks that are not fully ground for a second time, the present invention is proposed.

[0006] Therefore, the purpose of the present invention is to provide a coal grinding device for thermal power plants.

[0007] To solve the above technical problems, the present invention provides the following technical solutions: A coal grinding device for a thermal power plant, comprising a coal grinding assembly, including a mounting member, a driving member disposed on the mounting member, a pressing member disposed on the mounting member, a material distributing member disposed on the mounting member, and a guiding member disposed on the material distributing member; an adjusting assembly, including a rotating member disposed on the pressing member, and a pushing member disposed on the pressing member; and a conveying assembly, including a collecting member disposed on the mounting member, and a conveying member disposed on the collecting member.

[0008] As a preferred embodiment of the coal grinding device for a thermal power plant of the present invention, wherein: The mounting member includes a housing, a machine base disposed on the housing, a coal inlet pipe disposed on the housing, a pulverized coal outlet disposed on the housing, and an air inlet disposed on the housing.

[0009] As a preferred embodiment of the coal grinding device for a thermal power plant of the present invention, wherein: The driving member includes an electric motor, a speed reducer disposed in the machine base, a first gear disposed on the machine base, a second gear disposed on the machine base, and a grinding table disposed on the second gear.

[0010] As a preferred embodiment of the coal grinding device for a thermal power plant of the present invention, wherein: The pressing member includes a triangular frame disposed inside the housing, a fixing rod disposed on the triangular frame, a grinding roller disposed on the fixing rod, and a hydraulic pull rod disposed on the machine base.

[0011] As a preferred embodiment of the coal grinding device for a thermal power plant of the present invention, wherein: The material distributing member includes a connecting cylinder disposed inside the housing, a conveying roller disposed in the connecting cylinder, and a first motor disposed on the housing.

[0012] As a preferred embodiment of the coal grinding device for a thermal power plant of the present invention, wherein: The guiding member includes a placing groove disposed on the connecting cylinder, and a guiding pipe disposed on the placing groove.

[0013] As a preferred embodiment of the coal grinding device for a thermal power plant of the present invention, wherein: The rotating member includes a rotating ring disposed on the triangular frame, a screw rod disposed on the triangular frame, and a motor disposed on the screw rod.

[0014] As a preferred embodiment of the coal grinding device for a thermal power plant of the present invention, wherein: The pushing member includes a sliding groove opened on the fixing rod, an L-shaped toothed rod disposed in the sliding groove, a circular groove opened on the grinding roller, a sliding buckle disposed in the circular groove, and a connecting rod disposed on the L-shaped toothed rod.

[0015] As a preferred embodiment of the coal grinding device for thermal power plants of the present invention, the following is provided: the collecting member includes a belt sleeved on the grinding disc, an L-shaped telescopic rod arranged on the belt, a notch formed on the machine base, a collecting pipe arranged on the machine base, and a collecting box arranged on the machine base.

[0016] As a preferred embodiment of the coal grinding device for thermal power plants of the present invention, the following is provided: the conveying member includes a conveying cylinder arranged on the collecting box, a second motor arranged on the conveying cylinder, a rotating rod arranged at the output end of the second motor, a spiral blade arranged on the rotating rod, an opening formed on the conveying cylinder, and a conveyor belt arranged on the machine shell.

[0017] Advantages of the present invention: The present invention screens coal blocks through a material distributing member and places them on the corresponding grinding discs through a guiding pipe, and grinds coal blocks of different particle sizes in a classified manner, which can ensure that coal blocks of different particle sizes reach the required fineness in their respective grinding stages, thereby obtaining more uniform pulverized coal, reducing unnecessary over-grinding, and reducing energy consumption. Driven by the rotating member, the pushing member drives the grinding roller to be adjustable in angle, effectively improving the fineness uniformity and coal grinding efficiency of the pulverized coal. And through the collecting member, the coal blocks that bounce out and the coal blocks that are not fully ground during coal grinding are collected and re-fed into the coal pipe for secondary grinding to ensure the quality of the pulverized coal and improve the grinding efficiency. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for description in the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 It is an overall schematic diagram of a coal grinding device for a thermal power plant.

[0020] Figure 2 It is a schematic diagram of the driving member of a coal grinding device for a thermal power plant.

[0021] Figure 3 It is a schematic diagram of the pressing member of a coal grinding device for a thermal power plant.

[0022] Figure 4 It is a cross-sectional view of the material distributing member of a coal grinding device for a thermal power plant.

[0023] Figure 5 It is a cross-sectional view of the guiding member of a coal grinding device for a thermal power plant.

[0024] Figure 6Schematic diagram of an adjustment component of a coal grinding device for a thermal power plant.

[0025] Figure 7 It is Figure 6 The enlarged view of part A in

[0026] Figure 8 Schematic diagram of a conveying component of a coal grinding device for a thermal power plant.

[0027] Figure 9 It is Figure 8 The enlarged view of part B in Specific implementation manners

[0028] To make the above objects, features and advantages of the present invention more obvious and understandable, the specific implementation manners of the present invention will be described in detail below with reference to the accompanying drawings of the specification.

[0029] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0030] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure or characteristic that may be included in at least one implementation manner of the present invention. The "in one embodiment" appearing in different places in this specification does not all refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0031] Thirdly, the present invention is described in detail in conjunction with the schematic diagrams. When detailing the embodiments of the present invention, for the convenience of explanation, the cross-sectional views showing the device structure will be enlarged locally out of the general proportion, and the schematic diagrams are only examples and should not limit the scope of protection of the present invention herein. In addition, in actual production, three-dimensional spatial dimensions including length, width and depth should be included.

[0032] Embodiment 1

[0033] Refer to Figures 1 - 9, which is the first embodiment of the present invention. This embodiment provides a coal grinding device for a thermal power plant, including a coal grinding assembly 100, which includes a mounting member 101 for receiving a driving member 102 and a pressing member 103, a driving member 102 disposed on the mounting member 101 for cooperating with the pressing member 103 to grind coal blocks, a pressing member 103 disposed on the mounting member 101, which generates a rolling pressure with the driving member 102 when pressing, a feeding member 104 disposed on the mounting member 101 for screening coal blocks of different particle sizes, and a guiding member 105 disposed on the feeding member 104 for guiding the screened coal blocks for transportation; an adjusting assembly 200, which includes a rotating member 201 disposed on the pressing member 103 for providing driving force for a pushing member 202, and a pushing member 202 disposed on the pressing member 103 for pushing the pressing member 103 to adjust the angle; and a conveying assembly 300, which includes a collecting member 301 disposed on the mounting member 101 for collecting the coal blocks that pop out or are not fully ground, and a conveying member 302 disposed on the collecting member 301 for conveying the coal blocks that pop out or are not fully ground for secondary grinding.

[0034] Specifically, the mounting member 101 includes a casing 101a, a base 101b fixedly connected to the bottom of the casing 101a, a coal inlet pipe 101c fixedly connected to the top of the casing 101a, a powder discharge port 101d disposed on the casing 101a, and an air inlet 101e disposed on the casing 101a. The casing 101a plays a protective role, the base 101b provides support for the casing 101a, coal blocks enter the device through the coal inlet pipe 101c, the ground coal powder is discharged through the powder discharge port, the air inlet 101e is connected to a blower, and hot air enters the interior of the device through the air inlet 101e.

[0035] Furthermore, the driving member 102 includes an electric motor 102a, a speed reducer 102b disposed in the base 101b, a first gear 102c rotatably connected to the top of the base 101b, a second gear 102d rotatably connected to the top of the base 101b, and a grinding disc 102e fixedly connected to the second gear 102d. The electric motor 102a is fixedly connected to the speed reducer 102b, and the electric motor 102a provides driving force for the speed reducer 102b. The speed reducer 102b is used to reduce the speed of the electric motor 102a and increase the output torque so that the speed meets the actual requirements. The first gear 102c is fixedly connected to the output end of the speed reducer 102b, the first gear 102c meshes with the second gear 102d, and there are two second gears 102d and grinding discs 102e, which are symmetrically arranged.

[0036] Further, the pressing member 103 includes a tripod 103a disposed within the casing 101a, a fixing rod 103b fixedly connected to the side of the tripod 103a, a grinding roller 103c rotatably connected to the fixing rod 103b, and a hydraulic pull rod 103d fixedly connected to the machine base 101b. The tripod 103a provides bearing capacity for the fixing rod 103b and the grinding roller 103c. The fixing rod 103b is used to carry the grinding roller 103c. The grinding roller 103c is in close contact with the grinding disc 102e, and the generated rolling pressure grinds the coal blocks. A plurality of fixing rods 103b and grinding rollers 103c are provided and are evenly distributed in a circumferential manner. The end of the hydraulic pull rod 103d is fixedly connected to the tripod 103a. The hydraulic pressure generated by the hydraulic pull rod 103d is transmitted to the grinding roller 103c to generate grinding pressure with the grinding disc 102e. Two tripods 103a and hydraulic pull rods 103d are provided and are symmetrically arranged.

[0037] Further, the material distributing member 104 includes a connecting cylinder 104a fixedly connected within the casing 101a, a conveying roller 104b rotatably connected within the connecting cylinder 104a, and a first motor 104c fixedly connected to the casing 101a. One end of the coal inlet pipe 101c within the casing 101a is fixedly connected to the connecting cylinder 104a. The conveying roller 104b is conical in shape. Two conveying rollers 104b are provided and are symmetrically arranged. The output end of the first motor 104c is fixedly connected to one of the conveying rollers 104b, and the ends of the two conveying rollers 104b are engaged with each other.

[0038] Further, the guiding member 105 includes a placing groove 105a disposed on the connecting cylinder 104a, and a guiding pipe 105b fixedly connected to the placing groove 105a. Two placing grooves 105a and guiding pipes 105b are provided and are symmetrically arranged. The coal blocks conveyed on the conveying roller 104b enter the two placing grooves 105a respectively according to their sizes. The ends of the two guiding pipes 105b are respectively aligned with the centers of the two tripods 103a, so that coal blocks of different particle sizes enter the corresponding grinding discs 102e.

[0039] Operation process: Coal lumps enter the connecting cylinder 104a through the coal inlet pipe 101c. At this time, the first motor 104c is started. Since the ends of the two conveyor rollers 104b are meshed, the two conveyor rollers 104b rotate in opposite directions, pushing the coal lumps to move to the right. Since the two conveyor rollers 104b are conically arranged, the gap on the left side between the two conveyor rollers 104b is small, and the gap on the right side is large. The coal lumps enter the placement grooves 105a according to their sizes respectively. Under the guidance of the guide pipe 105b, different-sized coal lumps are released by controlling the guide pipe 105b according to the grinding requirements, pass through the tripod 103a and fall onto the grinding disc 102e. The pressing force of the pressing member 103 is adjusted according to the size of the fed coal lumps. The hydraulic pull rod 103d drives the tripod 103a to move downward. The grinding rollers 103c on the fixed rods 103b of the two tripods 103a are respectively suitable for the coal lumps to be ground. The motor 102a drives the first gear 102c to rotate through the speed reducer 102b, and drives the two second gears 102d to rotate, so that the two grinding discs 102e rotate. Due to the centrifugal force generated by the rotation of the grinding disc 102e, the coal lumps are dispersed on the grinding disc 102e. The hydraulic pressure generated by the hydraulic pull rod 103d is transmitted to the grinding roller 103c, generating a grinding pressure with the grinding disc 102e to grind the coal lumps. At this time, hot air enters through the air inlet 101e, blows up the crushed fine coal powder, dries the coal powder while taking it away, and the coal powder is discharged through the powder discharge port 101d. By classifying and grinding coal lumps of different particle sizes, it can ensure that coal lumps of different particle sizes reach the required fineness in their respective grinding stages, thereby obtaining more uniform coal powder, reducing unnecessary over-grinding, and reducing energy consumption.

[0040] Embodiment 2

[0041] Referring to Figures 6 - 7 , this is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is: The rotating member 201 includes a rotating ring 201a fixedly connected to the tripod 103a, a screw rod 201b rotatably connected to the tripod 103a, and a motor 201c fixedly connected to the screw rod 201b. The rotating ring 201a is provided with tooth grooves, the screw rod 201b is provided with gears, the rotating ring 201a is meshed with the screw rod 201b, and a plurality of screw rods 201b are arranged and evenly distributed in a circle, corresponding to the grinding rollers 103c, and the motor 201c provides driving force for the screw rod 201b.

[0042] Specifically, the driving member 202 includes a chute 202a formed on the fixed rod 103b, an L-shaped toothed rod 202b slidably connected in the chute 202a, a circular groove 202c formed on the grinding roller 103c, a sliding buckle 202d slidably connected in the circular groove 202c, and a connecting rod 202e fixedly connected to the L-shaped toothed rod 202b. The chute 202a guides the L-shaped toothed rod 202b. The L-shaped toothed rod 202b meshes with the screw rod 201b. The circular groove 202c guides the sliding buckle 202d. The connecting rod 202e is rotatably connected to the sliding buckle 202d that slides in the circular groove 202c.

[0043] The remaining structures are the same as those in Embodiment 1.

[0044] Operation process: When the motor 201c is started, the motor 201c drives a screw rod 201b to rotate. The swivel ring 201a rotates accordingly and drives multiple screw rods 201b to rotate. When the screw rod 201b rotates, since the screw rod 201b meshes with the L-shaped toothed rod 202, it drives the L-shaped toothed rod 202b to move in the chute 202a. The connecting rod 202e moves along with the movement of the L-shaped toothed rod 202b. Since the connecting rod 202e is rotatably connected to the sliding buckle 202d that slides in the circular groove 202c, the movement of the connecting rod 202e can push the grinding roller 103c to rotate on the fixed rod 103b, thereby realizing the angle adjustment of the grinding roller 103c and adjusting the gap between the grinding roller 103c and the grinding disc 102e, effectively improving the fineness uniformity of pulverized coal and the coal grinding efficiency.

[0045] Embodiment 3

[0046] Referring to Figures 8 - 9 , this is the third embodiment of the present invention. The difference between this embodiment and the above embodiments is that the collecting member 301 includes a belt 301a sleeved on the grinding disc 102e, an L-shaped telescopic rod 301b fixedly connected to the side edge of the belt 301a, a notch 301c formed on the machine base 101b, a collecting pipe 301d fixedly connected to the machine base 101b, and a collecting box 301e fixedly connected to the machine base 101b. Both ends of the belt 301a are respectively sleeved on two grinding discs 102e and are transmitted as the grinding disc 102e rotates. A spring is arranged inside the L-shaped telescopic rod 301b. The end of the L-shaped telescopic rod 301b is in close contact with the inner wall of the machine shell 101a. The L-shaped telescopic rod 301b is slidably connected in the notch 301c. The notch 301c guides the L-shaped telescopic rod 301b. The collecting pipe 301d is used to convey the coal blocks that bounce out of the grinding disc 102e and the coal blocks that are not fully ground. The collecting box 301e is used to store the coal blocks.

[0047] Specifically, the conveying member 302 includes a conveying cylinder 302a fixedly connected to the collection box 301e, a second motor 302b fixedly connected to the top of the conveying cylinder 302a, a rotating rod 302c fixedly connected to the output end of the second motor 302b, a spiral blade 302d fixedly connected to the rotating rod 302c, an opening 302e formed in the conveying cylinder 302a, and a conveyor belt 302f fixedly connected to the top of the machine housing 101a. The conveying cylinder 302a provides guidance for the coal blocks, the second motor 302b provides driving force for the rotating rod 302c, the rotating blade performs a spiral movement as the rotating rod 302c rotates. There are two openings 302e which are symmetrically arranged. The two openings 302e are respectively arranged at the bottom and the top of the connecting cylinder 104a. The conveyor belt 302f is used to convey the coal blocks.

[0048] The remaining structures are the same as those in Embodiment 2.

[0049] Operation process: When grinding the coal blocks, under the action of the centrifugal force generated by the rotation of the grinding disc 102e or the rolling pressure of the grinding disc 102e and the grinding roller 103c, some coal blocks may pop out, or there may be coal blocks that are not fully ground. When hot air enters the interior of the machine housing 101a, it blows up the fine coal powder, and the popped and unfully ground coal blocks will fall onto the machine housing 101a. The rotation of the grinding disc 102e drives the belt 301a to run, and the belt 301a drives the L-shaped telescopic rod 301b to push the coal blocks along the guidance of the notch 301c, so that the coal blocks enter the collection box 301e through the collection pipe 301d. When the second motor 302b is started, it drives the rotating rod 302c fixedly connected to its output end to rotate, and the spiral blade 302d rotates accordingly. The coal blocks in the collection box 301e enter the connecting cylinder 104a through the opening 302e formed at the bottom of the connecting cylinder 104a, and are spirally conveyed under the action of the spiral blade 302d, and are discharged onto the conveyor belt 302f through the opening 302e formed at the top of the connecting cylinder 104a. Under the conveyance of the conveyor belt 302f, the coal blocks that pop out during coal grinding and the unfully ground coal blocks are re-fed into the coal pipe 101c for secondary grinding, ensuring the quality of the coal powder and improving the grinding efficiency.

[0050] Importantly, it should be noted that the construction and arrangement of the present application shown in multiple different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who refer to this disclosure should easily understand that many modifications are possible without materially departing from the novel teachings and advantages of the subject matter described in this application (e.g., changes in the dimensions, scales, structures, shapes and proportions of various elements, as well as parameter values (such as temperature, pressure, etc.), installation arrangements, use of materials, colors, orientations, etc.). For example, an element shown as being integrally formed may be composed of multiple parts or elements, the position of the element may be inverted or otherwise changed, and the nature, number or position of discrete elements may be altered or changed. Accordingly, all such modifications are intended to be included within the scope of the present invention. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "means-plus-function" clause is intended to cover the structures that perform the recited function described herein, and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present invention. Accordingly, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0051] In addition, in order to provide a concise description of the exemplary embodiments, all features of the actual embodiments may not be described (i.e., those features that are not relevant to the currently contemplated best mode of carrying out the present invention or those features that are not relevant to implementing the present invention).

[0052] It should be understood that in the development of any actual implementation, as in any engineering or design project, numerous specific implementation decisions may be made. Such development efforts may be complex and time-consuming, but for those of ordinary skill in the art who benefit from this disclosure, without undue experimentation, such development efforts will be a routine task of design, manufacturing and production.

[0053] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention may be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A coal grinding device for a thermal power plant, characterized in that: including, a coal grinding assembly (100), comprising a mounting member (101), a driving member (102) disposed on the mounting member (101), a pressing member (103) disposed on the mounting member (101), a material distributing member (104) disposed on the mounting member (101), and a guiding member (105) disposed on the material distributing member (104); an adjusting assembly (200), comprising a rotating member (201) disposed on the pressing member (103), and a pushing member (202) disposed on the pressing member (103); and, a conveying assembly (300), comprising a collecting member (301) disposed on the mounting member (101), and a conveying member (302) disposed on the collecting member (301).

2. The coal grinding device for thermal power plants according to claim 1, characterized in that: The mounting member (101) comprises a casing (101a), a base (101b) disposed on the casing (101a), a coal inlet pipe (101c) disposed on the casing (101a), a pulverized coal outlet (101d) disposed on the casing (101a), and an air inlet (101e) disposed on the casing (101a).

3. The coal grinding device for thermal power plants according to claim 2, wherein: The driving member (102) comprises an electric motor (102a), a speed reducer (102b) disposed in the base (101b), a first gear (102c) disposed on the base (101b), a second gear (102d) disposed on the base (101b), and a grinding table (102e) disposed on the second gear (102d).

4. The coal grinding device for thermal power plants according to claim 3, characterized in that: The pressing member (103) comprises a tripod (103a) disposed inside the casing (101a), a fixing rod (103b) disposed on the tripod (103a), a grinding roller (103c) disposed on the fixing rod (103b), and a hydraulic pull rod (103d) disposed on the base (101b).

5. The coal grinding device for thermal power plants according to claim 4, characterized in that: The material distributing member (104) comprises a connecting cylinder (104a) disposed inside the casing (101a), a conveying roller (104b) disposed in the connecting cylinder (104a), and a first motor (104c) disposed on the casing (101a).

6. The coal grinding device for thermal power plants according to claim 5, characterized in that: The guiding member (105) comprises a placing groove (105a) disposed on the connecting cylinder (104a), and a guiding pipe (105b) disposed on the placing groove (105a).

7. The coal grinding device for thermal power plants according to claim 6, characterized in that: The rotating member (201) comprises a rotating ring (201a) disposed on the tripod (103a), a screw rod (201b) disposed on the tripod (103a), and a motor (201c) disposed on the screw rod (201b).

8. The coal grinding device for thermal power plants according to claim 7, characterized in that: The pusher (202) includes a chute (202a) formed in the fixed rod (103b), an L-shaped toothed rod (202b) disposed in the chute (202a), a circular groove (202c) formed in the grinding roller (103c), a sliding buckle (202d) disposed in the circular groove (202c), and a connecting rod (202e) disposed on the L-shaped toothed rod (202b).

9. The coal grinding device for a thermal power plant according to claim 8, characterized in that: The collector (301) includes a belt (301a) sleeved on the grinding disc (102e), an L-shaped telescopic rod (301b) disposed on the belt (301a), a notch (301c) formed in the machine base (101b), a collecting pipe (301d) disposed on the machine base (101b), and a collecting box (301e) disposed on the machine base (101b).

10. The coal grinding device for thermal power plants according to claim 9, characterized in that: The conveyor (302) includes a conveying cylinder (302a) disposed on the collecting box (301e), a second motor (302b) disposed on the conveying cylinder (302a), a rotating rod (302c) disposed on the output end of the second motor (302b), a spiral blade (302d) disposed on the rotating rod (302c), an opening (302e) formed in the conveying cylinder (302a), and a conveyor belt (302f) disposed on the machine shell (101a).

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