CN113578503A - Coal mill maintenance method and system, storage medium and terminal thereof - Google Patents
Coal mill maintenance method and system, storage medium and terminal thereof Download PDFInfo
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- CN113578503A CN113578503A CN202110791450.7A CN202110791450A CN113578503A CN 113578503 A CN113578503 A CN 113578503A CN 202110791450 A CN202110791450 A CN 202110791450A CN 113578503 A CN113578503 A CN 113578503A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C25/00—Control arrangements specially adapted for crushing or disintegrating
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Abstract
The invention provides a coal mill overhauling method and a system, a storage medium and a terminal thereof, comprising the following steps of: collecting coal powder concentration data, coal powder pipe wind speed data and coal powder fineness data of a plurality of coal powder pipes; comparing the coal powder concentration data of each coal powder pipe with a preset coal powder concentration threshold value, and determining the working state of each coal powder pipe according to the comparison result; comparing the pulverized coal pipe wind speed data of the pulverized coal pipe with a preset pulverized coal wind speed threshold, and determining the working state of the air supply equipment according to the comparison result; comparing the coal powder fineness data of the coal powder pipe with a preset coal powder fineness threshold, and determining the working state of the rotary separator according to the comparison result; can carry out accurate maintenance to the coal pulverizer like this, the emergence of prevention accident has reduced the human cost.
Description
Technical Field
The invention relates to the technical field of coal mill maintenance, in particular to a coal mill maintenance method and a system, a storage medium and a terminal thereof.
Background
Coal mills are machines for breaking up and grinding coal briquettes into coal dust, which are important auxiliary equipment for coal dust furnaces. The coal grinding process is a process in which coal is crushed and its surface area is increased continuously. To increase the new surface area, the binding force between solid molecules must be overcome, and thus energy is consumed. The coal is ground into coal powder in a coal mill mainly by three modes of crushing, smashing and grinding.
The coal mill can cause the loss of the coal mill after being used for a period of time, and the maintenance of the coal mill is carried out routinely according to the operating hours and the abrasion degree of the grinding roller for a long time or is consistent with the maintenance period of a unit, the target is not clear when the maintenance is carried out, the maintenance effect is greatly reduced, and a large amount of manpower and material resources are wasted.
Disclosure of Invention
In order to solve the technical problems, the invention provides a coal mill overhauling method, a system, a storage medium and a terminal thereof, which can accurately overhaul a coal mill, prevent accidents and reduce labor cost.
In order to achieve the purpose, the technical scheme of the invention is as follows:
the invention provides a coal mill overhauling method, which comprises the following steps:
collecting coal powder concentration data, coal powder pipe wind speed data and coal powder fineness data of a plurality of coal powder pipes;
comparing the coal powder concentration data of each coal powder pipe with a preset coal powder concentration threshold value, and determining the working state of each coal powder pipe according to the comparison result;
comparing the pulverized coal pipe wind speed data of the pulverized coal pipe with a preset pulverized coal wind speed threshold, and determining the working state of the air supply equipment according to the comparison result;
and comparing the coal powder fineness data of the coal powder pipe with a preset coal powder fineness threshold, and determining the working state of the rotary separator according to the comparison result.
The invention provides a coal mill overhauling method and a system, a storage medium and a terminal thereof, which can accurately overhaul a coal mill, prevent accidents and reduce labor cost.
As a preferred technical scheme, the pulverized coal pipe is arranged on the coal mill and connected with the coal mill.
As a preferred technical scheme, the air supply equipment is arranged on the coal mill and is connected with the coal mill.
As a preferred technical solution, the rotary separator is disposed on the coal mill, and the rotary separator is connected to the coal mill.
The preferable technical scheme comprises the following steps:
acquiring initial coal powder concentration data, initial coal powder pipe wind speed data and initial coal powder fineness data of each coal powder pipe at the outlet of the coal mill in an initial running state of the coal mill;
under different running time states of the coal mill, respectively acquiring coal dust concentration data, coal dust pipe wind speed data and coal dust fineness data of each coal dust pipe at the outlet of the coal mill under different running times;
and sending an image generation request according to the received initial coal powder concentration data, the initial coal powder pipe wind speed data, the initial coal powder fineness data, the coal powder concentration data under different running times, the coal powder pipe wind speed data under different running times and the coal powder fineness data under different running times, and obtaining a variation standard curve chart of the coal mill parameters.
As a preferred technical scheme, the method also comprises the following steps:
when the coal mill is in the same operation time, determining whether the comparison of the coal powder concentration data, the coal powder pipe wind speed data and the coal powder fineness data parameters of each coal powder pipe at the outlet of the coal mill and the corresponding data parameters on the change standard curve chart of the coal mill parameters is different, determining that the difference exists, and triggering a safety early warning instruction to start a corresponding safety mechanism when the coal mill fails.
The invention provides a computer storage medium for coal mill maintenance, which is stored with a computer program, wherein the stored computer program enables an electronic device to execute the coal mill maintenance method.
The invention provides a system for implementing the coal mill maintenance, which comprises:
the data acquisition module is used for acquiring coal powder concentration data, coal powder pipe wind speed data and coal powder fineness data of each coal powder pipe at the outlet of the coal mill;
the coal mill state determining module is used for determining the working state of the coal dust pipes according to the comparison of the received coal dust concentration data of each coal dust pipe and a preset coal dust concentration threshold value, determining the working state of the air supply equipment according to the comparison of the received coal dust pipe air speed data of each coal dust pipe and a preset coal dust air speed threshold value, and determining the working state of the rotary separator according to the comparison result according to the comparison of the received coal dust fineness data of each coal dust pipe and the preset coal dust air speed threshold value;
a standard curve chart generation module for variation of parameters of the coal mill: the system comprises a data acquisition module, a data processing module and a data processing module, wherein the data processing module is used for sending an image generation request according to initial coal dust concentration data, initial coal dust pipe wind speed data, initial coal dust fineness data, coal dust concentration data under different running times, coal dust pipe wind speed data under different running times and coal dust fineness data under different running times acquired by the data acquisition module to acquire a variation standard curve graph of parameters of the coal mill;
and the analysis processing module is used for confirming whether the coal powder concentration data, the coal powder pipe wind speed data and the coal powder fineness data parameters of each coal powder pipe at the outlet of the coal mill are different from the corresponding data parameter comparison on the change standard curve chart of the coal mill parameters or not under the same operation time of the coal mill, confirming the difference, triggering a safety early warning instruction when the coal mill breaks down, and starting a corresponding safety mechanism.
The invention provides a terminal for carrying the system for overhauling the coal mill.
Drawings
FIG. 1 is a flow chart of a coal mill servicing system provided by the present invention.
Detailed Description
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
It is understood that the present invention achieves the objects of the invention by way of some embodiments, and as shown in fig. 1, provides a coal mill servicing system comprising:
the data acquisition module is used for acquiring coal powder concentration data, coal powder pipe wind speed data and coal powder fineness data of each coal powder pipe at the outlet of the coal mill;
the coal mill state determining module is used for determining the working state of the coal dust pipes according to the comparison of the received coal dust concentration data of each coal dust pipe and a preset coal dust concentration threshold value, determining the working state of the air supply equipment according to the comparison of the received coal dust pipe air speed data of each coal dust pipe and a preset coal dust air speed threshold value, and determining the working state of the rotary separator according to the comparison result according to the comparison of the received coal dust fineness data of each coal dust pipe and the preset coal dust air speed threshold value;
a standard curve chart generation module for variation of parameters of the coal mill: the system comprises a data acquisition module, a data processing module and a data processing module, wherein the data processing module is used for sending an image generation request according to initial coal dust concentration data, initial coal dust pipe wind speed data, initial coal dust fineness data, coal dust concentration data under different running times, coal dust pipe wind speed data under different running times and coal dust fineness data under different running times acquired by the data acquisition module to acquire a variation standard curve graph of parameters of the coal mill;
and the analysis processing module is used for confirming whether the coal powder concentration data, the coal powder pipe wind speed data and the coal powder fineness data parameters of each coal powder pipe at the outlet of the coal mill are different from the corresponding data parameter comparison on the change standard curve chart of the coal mill parameters or not under the same operation time of the coal mill, confirming the difference, triggering a safety early warning instruction when the coal mill breaks down, and starting a corresponding safety mechanism.
The invention provides a terminal for carrying the coal mill maintenance system.
The data acquisition module monitors the wind speed data of the pulverized coal pipe according to the equal-section grid principle (reference standard 'performance test of coal mills and pulverizing systems in power stations') in two directions which are 90 degrees away from each other on the circular section of the primary air pipe, monitors the dynamic pressure by using a backrest speed measuring pipe with a calibrated coefficient, simultaneously measures the static pressure and the temperature in the pulverized coal pipe and the atmospheric pressure near a measuring hole, and calculates and acquires the wind speed data of the pulverized coal pipe in the pulverized coal pipe.
The data acquisition module samples coal powder samples point by using a flat-head coal powder constant-speed sampling gun according to a constant-section grid principle, and the sample collection of each coal powder pipe is not less than 80% of the volume of the collection tank every time, if the sample is too much or too little, the sampling time is adjusted; the coal powder samples collected by each coal powder pipe are independently packaged in the sealing bags and used for weighing, analyzing fineness and calculating and collecting coal powder concentration data and coal powder fineness data.
Taking the air speed of the pulverized coal pipe at the outlet of the coal pulverizer as an example, when the coal pulverizer is just put into operation, the condition that whether the adjustable shrinkage cavity of the pulverized coal pipe is completely closed or semi-closed can be found in time through the actually measured data of the speed distribution on the cross section of each pulverized coal pipe at the outlet of the coal pulverizer, and the timely maintenance operation is reminded; in actual operation, if the actual measurement data of the coal dust pipe wind speed online monitoring equipment at different time intervals shows that the wind speed of the coal dust pipe at the outlet of the coal pulverizer gradually decreases to be below a threshold value (18m/s) and has a trend of continuously decreasing, the blockage of the coal dust pipe is preliminarily judged, and the blockage needs to be cleared in time; in actual operation, if an online monitoring device or actual measurement data at different time intervals finds that the wind speed of the pulverized coal pipe at the outlet of the coal mill is gradually abnormal, compared with the wind speed of the rest pulverized coal pipes, the wind speed of a certain pulverized coal pipe is obviously higher (lower) than the pulverized coal speed of the rest pulverized coal pipes, if the wind speed is higher (lower) than the pulverized coal speed of the rest pulverized coal pipes by more than 20%, the throttle shrinkage cavity at the outlet of the coal mill cannot be adjusted to be within 10%, which indicates that the resistance characteristic of each pulverized coal pipe is changed, and the resistance block of each pulverized coal pipe needs to be redesigned.
Taking the coal powder concentration of the coal pulverizer outlet powder pipe as an example, in actual operation, if the actual measurement data of the coal powder concentration online monitoring equipment finds that the coal pulverizer outlet coal powder concentration data is gradually abnormal, compared with the preset coal powder concentration threshold value, the coal powder concentration data of a certain coal powder pipe is obviously higher (lower) than the preset coal powder concentration threshold value, if the coal powder concentration data is higher (lower) than 50%, the coal pulverizer outlet air ring or the rotary separator blade is broken or bridged, the coal pulverizer needs to be stopped, inspected and overhauled in time, and the defects are eliminated.
Taking the coal powder fineness of the coal mill outlet coal powder pipe as an example, in actual operation, if the actual measurement data of the coal powder fineness online monitoring equipment at different time intervals finds that the coal powder fineness data of the coal mill outlet coal powder pipe is gradually abnormal, compared with a preset coal powder fineness threshold value, the coal powder fineness data of a certain coal powder pipe is obviously higher (lower) than the rest preset coal powder fineness threshold values, if the coal powder fineness data is higher (lower) by more than 20%, the coal powder fineness data of the certain coal powder pipe indicates that an air ring or a rotary separator blade at the coal mill outlet is broken or bridged, the coal mill needs to be stopped, inspected and overhauled in time, and defects are eliminated.
The invention provides a coal mill overhauling method, which comprises the following steps:
collecting coal powder concentration data, coal powder pipe wind speed data and coal powder fineness data of a plurality of coal powder pipes;
comparing the coal powder concentration data of each coal powder pipe with a preset coal powder concentration threshold value, and determining the working state of each coal powder pipe according to the comparison result;
comparing the pulverized coal pipe wind speed data of the pulverized coal pipe with a preset pulverized coal wind speed threshold, and determining the working state of the air supply equipment according to the comparison result;
comparing the coal powder fineness data of the coal powder pipe with a preset coal powder fineness threshold, and determining the working state of the rotary separator according to the comparison result;
acquiring initial coal powder concentration data, initial coal powder pipe wind speed data and initial coal powder fineness data of each coal powder pipe at the outlet of the coal mill in an initial running state of the coal mill;
under different running time states of the coal mill, respectively acquiring coal dust concentration data, coal dust pipe wind speed data and coal dust fineness data of each coal dust pipe at the outlet of the coal mill under different running times;
sending an image generation request according to the received initial coal powder concentration data, the initial coal powder pipe wind speed data, the initial coal powder fineness data, the coal powder concentration data under different running times, the coal powder pipe wind speed data under different running times and the coal powder fineness data under different running times, and obtaining a variation standard curve chart of parameters of the coal mill;
when the coal mill is in the same operation time, determining whether the comparison of the coal powder concentration data, the coal powder pipe wind speed data and the coal powder fineness data parameters of each coal powder pipe at the outlet of the coal mill and the corresponding data parameters on the change standard curve chart of the coal mill parameters is different, determining that the difference exists, and triggering a safety early warning instruction to start a corresponding safety mechanism when the coal mill fails.
The pulverized coal pipe is arranged on the coal mill and connected with the coal mill. The air supply equipment is arranged on the coal mill and connected with the coal mill. The rotary separator is arranged on the coal mill and connected with the coal mill.
The invention provides a coal mill overhauling method, which comprises the following steps:
s1 coal powder pipe wind speed on-line monitoring equipment is used for monitoring coal powder pipe wind speed data at the outlet of the coal mill, coal powder concentration on-line monitoring equipment is used for monitoring coal powder concentration data at the outlet of the coal mill, and coal powder fineness on-line monitoring equipment is used for monitoring coal powder fineness data at the outlet of the coal mill;
s2, when the unit is in a running state and the coal mill runs, acquiring initial coal powder concentration data, initial coal powder pipe wind speed data and initial coal powder fineness data of each coal powder pipe at the outlet of the coal mill; simultaneously, respectively acquiring coal dust concentration data of each coal dust pipe at the outlet of the coal mill under different operation times (after 3000h, 6000h, 9000h and 12000 h), coal dust pipe wind speed data under different operation times (after 3000h, 6000h, 9000h and 12000 h) and coal dust fineness data under different operation times (after 3000h, 6000h, 9000h and 12000 h);
s3, analyzing and sending an image generation request according to the received initial coal powder concentration data, initial coal powder pipe wind speed data, initial coal powder fineness data, coal powder concentration data under different running times, coal powder pipe wind speed data under different running times and coal powder fineness data under different running times, acquiring a change standard curve chart of parameters of the coal mill, bringing the change standard curve chart into a coal mill state overhaul basic database, and guiding the state overhaul of the coal mill.
The invention provides a computer storage medium for coal mill maintenance, which is stored with a computer program, wherein the stored computer program enables an electronic device to execute the coal mill maintenance method.
The invention provides a coal mill overhauling method and a system, a storage medium and a terminal thereof, which can accurately overhaul a coal mill, prevent accidents and reduce labor cost.
It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes in the features and embodiments, or equivalent substitutions may be made therein by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all modifications and equivalents falling within the scope of the appended claims. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (9)
1. A coal mill overhauling method is characterized by comprising the following steps:
collecting coal powder concentration data, coal powder pipe wind speed data and coal powder fineness data of a plurality of coal powder pipes;
comparing the coal powder concentration data of each coal powder pipe with a preset coal powder concentration threshold value, and determining the working state of each coal powder pipe according to the comparison result;
comparing the pulverized coal pipe wind speed data of the pulverized coal pipe with a preset pulverized coal wind speed threshold, and determining the working state of the air supply equipment according to the comparison result;
and comparing the coal powder fineness data of the coal powder pipe with a preset coal powder fineness threshold, and determining the working state of the rotary separator according to the comparison result.
2. The coal mill servicing method of claim 1, wherein the pulverized coal pipe is disposed on the coal mill, the pulverized coal pipe being connected to the coal mill.
3. The coal mill overhauling method of claim 1 wherein the air supply device is disposed on the coal mill and the air supply device is connected to the coal mill.
4. The coal mill servicing method of claim 1, wherein the rotating separator is disposed on the coal mill, the rotating separator being connected to the coal mill.
5. The coal pulverizer servicing method of claim 1, comprising the steps of:
acquiring initial coal powder concentration data, initial coal powder pipe wind speed data and initial coal powder fineness data of each coal powder pipe at the outlet of the coal mill in an initial running state of the coal mill;
under different running time states of the coal mill, respectively acquiring coal dust concentration data, coal dust pipe wind speed data and coal dust fineness data of each coal dust pipe at the outlet of the coal mill under different running times;
and sending an image generation request according to the received initial coal powder concentration data, the initial coal powder pipe wind speed data, the initial coal powder fineness data, the coal powder concentration data under different running times, the coal powder pipe wind speed data under different running times and the coal powder fineness data under different running times, and obtaining a variation standard curve chart of the coal mill parameters.
6. The coal mill servicing method of claim 5, further comprising the steps of:
when the coal mill is in the same operation time, determining whether the comparison of the coal powder concentration data, the coal powder pipe wind speed data and the coal powder fineness data parameters of each coal powder pipe at the outlet of the coal mill and the corresponding data parameters on the change standard curve chart of the coal mill parameters is different, determining that the difference exists, and triggering a safety early warning instruction to start a corresponding safety mechanism when the coal mill fails.
7. A computer storage medium for coal mill maintenance, having stored thereon a computer program for causing an electronic device to perform the coal mill maintenance method of any one of claims 1-6.
8. A coal mill servicing system for carrying out any one of claims 1-6, comprising:
the data acquisition module is used for acquiring coal powder concentration data, coal powder pipe wind speed data and coal powder fineness data of each coal powder pipe at the outlet of the coal mill;
the coal mill state determining module is used for determining the working state of the coal dust pipes according to the comparison of the received coal dust concentration data of each coal dust pipe and a preset coal dust concentration threshold value, determining the working state of the air supply equipment according to the comparison of the received coal dust pipe air speed data of each coal dust pipe and a preset coal dust air speed threshold value, and determining the working state of the rotary separator according to the comparison result according to the comparison of the received coal dust fineness data of each coal dust pipe and the preset coal dust air speed threshold value;
a standard curve chart generation module for variation of parameters of the coal mill: the system comprises a data acquisition module, a data processing module and a data processing module, wherein the data processing module is used for sending an image generation request according to initial coal dust concentration data, initial coal dust pipe wind speed data, initial coal dust fineness data, coal dust concentration data under different running times, coal dust pipe wind speed data under different running times and coal dust fineness data under different running times acquired by the data acquisition module to acquire a variation standard curve graph of parameters of the coal mill;
and the analysis processing module is used for confirming whether the coal powder concentration data, the coal powder pipe wind speed data and the coal powder fineness data parameters of each coal powder pipe at the outlet of the coal mill are different from the corresponding data parameter comparison on the change standard curve chart of the coal mill parameters or not under the same operation time of the coal mill, confirming the difference, triggering a safety early warning instruction when the coal mill breaks down, and starting a corresponding safety mechanism.
9. A terminal carrying the coal pulverizer servicing system of claim 8.
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