A coal mill grinding table device that is easy to clean

Abstract

The present application relates to the technical field of coal mill, and discloses a coal mill grinding disc device convenient to clean, which comprises a coal mill grinding disc, the coal mill grinding disc is arranged on a coal mill base, a groove matched with the shape of a coal mill grinding roller is arranged on the upper portion of the coal mill grinding disc, and a scraper is arranged on the bottom of the coal mill grinding disc; a cleaning mechanism is arranged at the central position of the coal mill grinding disc in a liftable manner, the cleaning mechanism comprises a wind pipe and a tuyere, the tuyere is arranged on the top of the wind pipe, the wind pipe is connected with a primary air fan, the primary air fan is connected with a coal mill air chamber, and a valve is arranged on the inlet of the wind pipe; and a control system is connected with the cleaning mechanism, and is used for controlling the cleaning mechanism to clean according to the running state of the coal mill grinding disc. The coal mill grinding disc is swept from the center to the periphery, and the accumulation of dust on the coal mill grinding disc is reduced.

Description

Technical Field

[0001] This invention relates to the field of coal mill technology, and in particular to a coal mill grinding disc device that is easy to clean. Background Technology

[0002] Coal mills are one of the important auxiliary equipment in coal-fired power plant boilers, used to crush coal lumps and grind them into pulverized coal. Currently, most coal-fired power plant boilers use medium-speed coal mills as the pulverizing system equipment. As a pulverizing device that transforms raw coal into qualified pulverized coal, the coal mill plays the roles of grinding, conveying, and drying pulverized coal. Its working environment is harsh, and the working parts wear out quickly, requiring regular replacement and maintenance. After the coal mill stops grinding, coal, sand, and other residues remain on the grinding disc, requiring manual labor to clean it before maintenance can begin. This cleaning work has traditionally relied on manual labor, which is time-consuming, labor-intensive, and affects the normal operation of the coal mill due to the confined working environment, the inability to spread out the working face, and the long cleaning time. Therefore, there is an urgent need for a coal mill grinding disc cleaning device that can achieve the blowing and cleaning of the coal mill grinding disc, reducing the accumulation of ash and sand. Summary of the Invention

[0003] The purpose of this invention is to provide a coal mill grinding disc device that is easy to clean, solving the problem that existing coal mill grinding discs accumulate a lot of ash or sand during long-term operation, making them difficult to clean.

[0004] This invention provides a coal mill grinding disc device that is easy to clean, comprising:

[0005] A coal mill grinding disc is mounted on a coal mill base. The upper part of the coal mill grinding disc has a groove that matches the shape of the coal mill grinding roller, and the bottom of the coal mill grinding disc has a scraper.

[0006] A cleaning mechanism is provided, which is vertically and flexibly positioned at the center of the coal mill grinding disc. The cleaning mechanism includes an air duct and an air outlet. The air outlet is located at the top of the air duct. The air duct is connected to a primary air fan, and the primary air fan is connected to the coal mill air chamber. A valve is provided at the inlet of the air duct.

[0007] A control system is connected to the cleaning mechanism, and the control system is used to control the cleaning mechanism to perform cleaning according to the operating status of the coal mill disc.

[0008] In some embodiments of this application, the setting of the air outlet is improved so that it can blow air from the center of the coal mill disc to the surrounding area. The air outlet is equipped with a filter screen, the air outlet direction is parallel to the coal mill disc, and the air outlet direction is perpendicular to the air duct.

[0009] In some embodiments of this application, the control system is improved, and the control system includes a data acquisition module, a processing module, and a control module;

[0010] The data acquisition module is used to collect the operating status of the coal mill;

[0011] The processing module is used to set control commands for the cleaning mechanism according to the operating status of the coal mill;

[0012] The control module is used to control the cleaning mechanism according to the control instructions.

[0013] In some embodiments of this application, a specific method for the acquisition module to acquire the operating status of the coal mill is disclosed. The acquisition module acquires the operating status of the coal mill, including:

[0014] The data acquisition module is connected to the coal mill control system;

[0015] The acquisition module obtains the operating status of the coal mill through the coal mill control system;

[0016] The operating status includes the coal mill running time, coal quantity in the coal mill, and hydraulic pressure of the coal mill rollers.

[0017] In some embodiments of this application, the composition of the acquisition module is disclosed to facilitate the acquisition of the weight of the coal block falling into the center of the coal mill grinding disc. The acquisition module also includes a weighing sensor, which is set at the top of the air duct and is used to detect the weight of the coal block at the center of the coal mill grinding disc.

[0018] In some embodiments of this application, the specific function of the processing module is disclosed. The processing module sets control commands for the cleaning mechanism according to the operating status of the coal mill, including:

[0019] The degree of coal grinding is determined based on the coal quantity value of the coal mill, the hydraulic pressure value of the coal mill roller, and the running time of the coal mill.

[0020] The air volume of the primary air fan is controlled according to the degree of grinding of the coal.

[0021] The lifting and lowering of the cleaning mechanism and the opening and closing of the valve are controlled according to the weight of the coal block, so that primary hot air enters the coal mill air chamber from the center of the coal mill disc to clean the coal mill disc.

[0022] In some embodiments of this application, a specific method for determining the degree of coal grinding is disclosed, which determines the degree of coal grinding based on the coal quantity value of the coal mill, the hydraulic pressure value of the coal mill rollers, and the running time of the coal mill, including:

[0023] The system has a pre-defined relationship between the coal quantity value of the coal mill, the hydraulic pressure value of the coal mill rollers, and the running time of the coal mill.

[0024] Based on the correspondence, determine the preset hydraulic value of the coal mill roller and the preset running time of the coal mill corresponding to the coal quantity value of the coal mill.

[0025] If the hydraulic pressure value of the coal mill roller reaches the preset hydraulic pressure value of the coal mill roller and the running time of the coal mill reaches the preset running time of the coal mill, then it is determined that the degree of grinding of the coal block has reached the standard.

[0026] If the hydraulic pressure value of the coal mill roller does not reach the preset hydraulic pressure value of the coal mill roller and the running time of the coal mill does not reach the preset running time of the coal mill, then it is determined that the degree of grinding of the coal block does not meet the standard.

[0027] In some embodiments of this application, determining the degree of coal grinding also includes:

[0028] If the hydraulic pressure value of the coal mill roller does not reach the preset hydraulic pressure value of the coal mill roller, but the running time of the coal mill reaches the preset running time of the coal mill, then the hydraulic pressure difference between the hydraulic pressure value of the coal mill roller and the preset hydraulic pressure value of the coal mill roller, and the time difference between the running time of the coal mill and the preset running time of the coal mill are determined. If the hydraulic pressure difference is less than half of the preset hydraulic pressure value of the coal mill roller, and the time difference is greater than the preset running time of the coal mill, then the degree of coal grinding is determined to have reached the standard.

[0029] If the hydraulic pressure value of the coal mill roller reaches the preset hydraulic pressure value, but the running time of the coal mill does not reach the preset running time, then the hydraulic pressure difference between the hydraulic pressure value of the coal mill roller and the preset hydraulic pressure value, and the time difference between the running time of the coal mill and the preset running time are determined. If the hydraulic pressure difference is greater than half of the preset hydraulic pressure value of the coal mill roller and the time difference is less than half of the preset running time of the coal mill, then the degree of coal grinding is determined to have reached the standard.

[0030] In some embodiments of this application, a specific method for controlling the cleaning mechanism and valves is disclosed, wherein the lifting and lowering of the cleaning mechanism and the opening and closing of the valves are controlled according to the weight of the coal block, including:

[0031] If the weight of the coal block is less than the preset coal block weight, the cleaning mechanism is controlled to be in the raised state and the valve is opened;

[0032] If the weight of the coal block is greater than the preset coal block weight, the cleaning mechanism is controlled to descend and the valve is closed.

[0033] In some embodiments of this application, the function of the scraper is disclosed, wherein the scraper is used to follow the rotation of the coal mill disc to clean up coal chunks and large debris that fall from the bottom of the coal mill disc.

[0034] This invention discloses a coal mill grinding disc device that is easy to clean, comprising: a coal mill grinding disc, which is disposed on a coal mill base, the upper part of the coal mill grinding disc having a groove matching the shape of the coal mill grinding roller, and the bottom of the coal mill grinding disc having a scraper; a cleaning mechanism, which is vertically and flexibly disposed at the center of the coal mill grinding disc, the cleaning mechanism including an air duct and an air outlet, the air outlet being disposed at the top of the air duct, the air duct being connected to a primary air fan, the primary air fan being connected to the coal mill air chamber, wherein a valve is provided at the inlet of the air duct; and a control system, which is connected to the cleaning mechanism, the control system being used to control the cleaning mechanism to perform cleaning according to the operating status of the coal mill grinding disc.

[0035] This invention achieves the cleaning of the coal mill grinding disc by setting up a cleaning mechanism to blow it from the center outwards and from the bottom to the top, thereby reducing the accumulation of coal powder or fine sand in the grooves of the coal mill grinding disc and realizing the cleaning of the coal mill grinding disc.

[0036] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the structure of a coal mill grinding disc device that is easy to clean, according to the present invention.

[0038] Figure 2 This is a functional block diagram of the control system in an embodiment of the present invention.

[0039] Figure Labels

[0040] 1. Coal mill grinding disc; 11. Groove; 2. Coal mill base; 3. Coal mill grinding roller; 4. Scraper; 5. Air duct; 6. Air outlet; 7. Coal mill air chamber; 8. Discharge outlet. Detailed Implementation

[0041] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0042] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used herein have the ordinary meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0043] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments of the present invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof, without excluding other elements or objects. The terms "first," "second," and similar words used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "side," and "bottom," indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are merely relational terms determined for the convenience of describing the structural relationships of the various components or elements of the present invention, and do not specifically refer to any component or element in the invention, nor should they be construed as limiting the invention. Terms such as "fixed," "connected," and "linked," etc., should be interpreted broadly, indicating that it can be a fixed connection, an integral connection, or a detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. For researchers or technicians in the field, the specific meaning of the above terms in this invention can be determined according to the specific circumstances, and they should not be construed as limitations on this invention.

[0044] Example

[0045] Coal mills are used to crush coal lumps and grind them into pulverized coal. As a pulverizing equipment that transforms raw coal into qualified pulverized coal, coal mills play the roles of grinding, conveying, and drying pulverized coal. Their working environment is harsh, and the working parts wear out quickly, requiring regular replacement and maintenance. After the coal mill stops grinding, coal, sand, and other debris remain on the grinding disc, requiring manual labor to clean it. Only after cleaning can maintenance work begin. Previously, this cleaning work relied on manual labor, which was time-consuming, labor-intensive, and affected the normal operation of the coal mill due to the confined working environment and the inability to spread out the working face. Therefore, there is an urgent need for a coal mill grinding disc cleaning device that can effectively clean the grinding disc and reduce the accumulation of ash and sand.

[0046] This invention provides a device for easy cleaning of a coal mill grinding disc 1, such as... Figure 1 and Figure 2 As shown, it includes:

[0047] A coal mill grinding disc 1 is mounted on a coal mill base 2. The upper part of the coal mill grinding disc 1 is provided with a groove 11 that matches the shape of the coal mill grinding roller 3. The bottom of the coal mill grinding disc 1 is provided with a scraper 4.

[0048] A cleaning mechanism is provided, which is vertically and flexibly positioned at the center of the grinding disc 1 of the coal mill. The cleaning mechanism includes an air duct 5 and an air outlet 6. The air outlet 6 is located at the top of the air duct 5. The air duct 5 is connected to a primary air fan, and the primary air fan is connected to the air chamber 7 of the coal mill. A valve is provided at the inlet of the air duct 5.

[0049] A control system is connected to the cleaning mechanism, and the control system is used to control the cleaning mechanism to perform cleaning according to the operating status of the coal mill grinding disc 1.

[0050] This invention achieves the blowing of the coal mill grinding disc 1 from the center outwards and from the bottom upwards by setting up a cleaning mechanism and a control system, thereby reducing the accumulation of ash or sand on the coal mill grinding disc 1.

[0051] In some embodiments of this application, the setting of the air outlet 6 is improved so that it can blow air from the center of the coal mill grinding disc 1 to the surrounding area through the air outlet 6. The air outlet 6 is provided with a filter screen. The direction of the air outlet 6 is parallel to the coal mill grinding disc 1 and perpendicular to the air duct 5.

[0052] In this embodiment, several air vents 6 are provided, and the direction of the air vents 6 is set parallel to the coal mill grinding disc 1 to ensure that the direction of the primary hot air delivered through the air vents 6 is from the center of the coal mill grinding disc 1 outwards. In addition, the primary air fan is connected not only to the air duct 5, but also to the coal mill air chamber 7. When the primary air fan is running, the primary hot air blows upwards from the bottom of the coal mill grinding disc 1, which can also reduce the accumulation of ash at the bottom of the coal mill grinding disc 1.

[0053] In some embodiments of this application, the control system is improved, and the control system includes a data acquisition module, a processing module, and a control module.

[0054] The acquisition module is used to collect the operating status of the coal mill.

[0055] The processing module is used to set control commands for the cleaning mechanism according to the operating status of the coal mill.

[0056] The control module is used to control the cleaning mechanism according to the control instructions.

[0057] In some embodiments of this application, a specific method for the acquisition module to acquire the operating status of the coal mill is disclosed. The acquisition module acquires the operating status of the coal mill, including:

[0058] The data acquisition module is connected to the coal mill control system.

[0059] The acquisition module obtains the operating status of the coal mill through the coal mill control system.

[0060] The operating status includes the coal mill running time, coal quantity in the coal mill, and hydraulic pressure of the coal mill rollers.

[0061] In some embodiments of this application, the composition of the acquisition module is disclosed to facilitate the acquisition of the weight of the coal block falling into the center of the coal mill grinding disc 1. The acquisition module also includes a weighing sensor, which is set at the top of the air duct 5 and is used to detect the weight of the coal block at the center of the coal mill grinding disc 1.

[0062] In some embodiments of this application, the specific function of the processing module is disclosed. The processing module sets control commands for the cleaning mechanism according to the operating status of the coal mill, including:

[0063] The degree of coal grinding is determined based on the coal quantity value of the coal mill, the hydraulic pressure value of the coal mill roller, and the running time of the coal mill.

[0064] The air volume of the primary air fan is controlled according to the degree of grinding of the coal.

[0065] The lifting and lowering of the cleaning mechanism and the opening and closing of the valve are controlled according to the weight of the coal block, so that primary hot air enters the coal mill air chamber 7 from the center of the coal mill disc 1 to clean the coal mill disc 1.

[0066] In this embodiment, the coal quantity value is the amount of coal added into the coal mill, and the hydraulic pressure value of the coal mill roller is the grinding pressure of the coal mill roller. Since the coal mill roller is controlled by a hydraulic mechanism, the hydraulic value represents the grinding pressure of the coal mill roller.

[0067] In some embodiments of this application, a specific method for determining the degree of coal grinding is disclosed, which determines the degree of coal grinding based on the coal quantity value of the coal mill, the hydraulic pressure value of the coal mill rollers, and the running time of the coal mill, including:

[0068] The system has a pre-defined relationship between the coal quantity value of the coal mill, the hydraulic pressure value of the coal mill rollers, and the running time of the coal mill.

[0069] Based on the correspondence, the preset hydraulic value of the coal mill roller and the preset running time of the coal mill are determined according to the coal quantity value of the coal mill.

[0070] If the hydraulic pressure value of the coal mill roller reaches the preset hydraulic pressure value and the running time of the coal mill reaches the preset running time, then the degree of coal grinding is determined to meet the standard.

[0071] If the hydraulic pressure value of the coal mill roller does not reach the preset hydraulic pressure value of the coal mill roller and the running time of the coal mill does not reach the preset running time of the coal mill, then it is determined that the degree of grinding of the coal block does not meet the standard.

[0072] In this embodiment, the degree of coal grinding is related not only to the hydraulic pressure of the mill rollers (i.e., the grinding pressure) but also to the grinding time. Therefore, by analyzing the hydraulic pressure of the mill rollers and the mill running time, it is determined whether the degree of coal grinding meets the standard. Only when the fineness of the coal powder meets the standard can the coal powder be carried out with the primary hot air. If the fineness of the coal powder is too low, the primary hot air is not enough to blow up the coal powder. Therefore, it is necessary to determine the degree of coal grinding before controlling the primary blower to start ventilation.

[0073] In some embodiments of this application, determining the degree of coal grinding also includes:

[0074] If the hydraulic pressure value of the coal mill roller does not reach the preset hydraulic pressure value, but the running time of the coal mill reaches the preset running time, then the hydraulic pressure difference between the hydraulic pressure value of the coal mill roller and the preset hydraulic pressure value, and the time difference between the running time of the coal mill and the preset running time are determined. If the hydraulic pressure difference is less than half of the preset hydraulic pressure value of the coal mill roller, and the time difference is greater than the preset running time of the coal mill, then the degree of coal grinding is determined to have reached the standard.

[0075] If the hydraulic pressure value of the coal mill roller reaches the preset hydraulic pressure value, but the running time of the coal mill does not reach the preset running time, then the hydraulic pressure difference between the hydraulic pressure value of the coal mill roller and the preset hydraulic pressure value, and the time difference between the running time of the coal mill and the preset running time are determined. If the hydraulic pressure difference is greater than half of the preset hydraulic pressure value of the coal mill roller and the time difference is less than half of the preset running time of the coal mill, then the degree of coal grinding is determined to have reached the standard.

[0076] In some embodiments of this application, a specific method for controlling the cleaning mechanism and valves is disclosed, wherein the lifting and lowering of the cleaning mechanism and the opening and closing of the valves are controlled according to the weight of the coal block, including:

[0077] If the weight of the coal block is less than the preset coal block weight, the cleaning mechanism is controlled to be raised and the valve is opened.

[0078] If the weight of the coal block is greater than the preset coal block weight, the cleaning mechanism is controlled to descend and the valve is closed.

[0079] In some embodiments of this application, the function of the scraper 4 is disclosed, wherein the scraper 4 is used to follow the rotation of the coal mill grinding disc 1 to clean up coal chunks and large debris that fall from the bottom of the coal mill grinding disc 1.

[0080] In this embodiment, the scraper 4 is mounted on the bottom of the coal mill grinding disc 1. When the coal mill grinding disc 1 rotates, the scraper 4 will also rotate and discharge the falling coal chunks and large debris into the slag discharge box through the discharge port 8.

[0081] Finally, 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 preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

[0082] The system provided in the above embodiments is only illustrated by the division of the above functional modules. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the modules or steps in the embodiments of the present invention can be further decomposed or combined. For example, the modules in the above embodiments can be merged into one module, or further divided into multiple sub-modules to complete all or part of the functions described above. The names of the modules and steps involved in the embodiments of the present invention are only for distinguishing the various modules or steps and are not considered as an improper limitation of the present invention.

[0083] Those skilled in the art will recognize that the modules and method steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. The programs corresponding to the software modules and method steps can be placed in random access memory (RAM), main memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disks, removable disks, CD-ROMs, or any other form of storage medium known in the art. To clearly illustrate the interchangeability of electronic hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in electronic hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the invention.

Claims

1. A coal mill grinding disc device that is easy to clean, characterized in that, include: A coal mill grinding disc is mounted on a coal mill base. The upper part of the coal mill grinding disc has a groove that matches the shape of the coal mill grinding roller, and the bottom of the coal mill grinding disc has a scraper. A cleaning mechanism is provided, which is vertically and flexibly positioned at the center of the coal mill grinding disc. The cleaning mechanism includes an air duct and an air outlet. The air outlet is located at the top of the air duct. The air duct is connected to a primary air fan, and the primary air fan is connected to the coal mill air chamber. A valve is provided at the inlet of the air duct. A control system is connected to the cleaning mechanism, and the control system is used to control the cleaning mechanism to perform cleaning according to the operating status of the coal mill disc; The control system includes a data acquisition module, a processing module, and a control module; the data acquisition module is used to acquire the operating status of the coal mill; the processing module is used to set control commands for the cleaning mechanism based on the operating status of the coal mill; and the control module is used to control the cleaning mechanism according to the control commands. The data acquisition module collects the operating status of the coal mill, including: the data acquisition module is connected to the coal mill control system; the data acquisition module obtains the operating status of the coal mill through the coal mill control system; the operating status includes the coal mill running time, the coal quantity value of the coal mill, and the hydraulic pressure value of the coal mill grinding rollers; The processing module sets control commands for the cleaning mechanism based on the operating status of the coal mill, including: determining the degree of coal grinding based on the coal quantity, hydraulic pressure of the grinding rollers, and the operating time of the coal mill; controlling the air volume of the primary air fan based on the degree of coal grinding; and controlling the lifting and lowering of the cleaning mechanism and the opening and closing of the valves based on the weight of the coal, so that primary hot air enters the coal mill air chamber from the center of the grinding disc to clean the grinding disc. The degree of coal grinding is determined based on the coal quantity value, the hydraulic pressure value of the coal mill rollers, and the running time of the coal mill. This includes: pre-setting a correspondence between the coal quantity value, the hydraulic pressure value of the coal mill rollers, and the running time of the coal mill; determining the preset hydraulic pressure value of the coal mill rollers and the preset running time of the coal mill corresponding to the coal quantity value based on the correspondence; if the hydraulic pressure value of the coal mill rollers reaches the preset hydraulic pressure value and the running time of the coal mill reaches the preset running time, then the degree of coal grinding is determined to meet the standard; if the hydraulic pressure value of the coal mill rollers does not reach the preset hydraulic pressure value and the running time of the coal mill does not reach the preset running time, then the degree of coal grinding is determined to not meet the standard. The determination of the degree of coal grinding further includes: if the hydraulic pressure value of the coal mill roller does not reach the preset hydraulic pressure value of the coal mill roller, but the running time of the coal mill reaches the preset running time of the coal mill, then the hydraulic pressure difference between the hydraulic pressure value of the coal mill roller and the preset hydraulic pressure value of the coal mill roller, and the time difference between the running time of the coal mill and the preset running time of the coal mill are determined; if the hydraulic pressure difference is less than half of the preset hydraulic pressure value of the coal mill roller, and the time difference is greater than the preset running time of the coal mill, then the degree of coal grinding is determined to be... If the hydraulic pressure value of the coal mill roller reaches the preset hydraulic pressure value, but the running time of the coal mill does not reach the preset running time, then the hydraulic pressure difference between the hydraulic pressure value of the coal mill roller and the preset hydraulic pressure value, and the time difference between the running time of the coal mill and the preset running time are determined. If the hydraulic pressure difference is greater than half of the preset hydraulic pressure value of the coal mill roller and the time difference is less than half of the preset running time of the coal mill, then the degree of coal grinding is determined to have reached the standard.

2. The easy-to-clean coal mill grinding disc device according to claim 1, characterized in that, The air outlet is equipped with a filter screen, and the direction of the air outlet is parallel to the grinding disc of the coal mill and perpendicular to the air duct.

3. The easy-to-clean coal mill grinding disc device according to claim 1, characterized in that, The acquisition module also includes a weighing sensor, which is installed at the top of the air duct and is used to detect the weight of the coal block at the center of the coal mill's grinding disc.

4. The easy-to-clean coal mill grinding disc device according to claim 3, characterized in that, The control of raising and lowering the cleaning mechanism and opening and closing the valve includes: If the weight of the coal block is less than the preset coal block weight, the cleaning mechanism is controlled to be in the raised state and the valve is opened; If the weight of the coal block is greater than the preset coal block weight, the cleaning mechanism is controlled to descend and the valve is closed.

5. The easy-to-clean coal mill grinding disc device according to claim 1, characterized in that, The scraper is used to follow the rotation of the coal mill disc to clean up coal chunks and large debris that fall from the bottom of the coal mill disc.

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