CN221063060U - Intelligent coal mill system - Google Patents
Intelligent coal mill system Download PDFInfo
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- CN221063060U CN221063060U CN202321955175.9U CN202321955175U CN221063060U CN 221063060 U CN221063060 U CN 221063060U CN 202321955175 U CN202321955175 U CN 202321955175U CN 221063060 U CN221063060 U CN 221063060U
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- 239000003245 coal Substances 0.000 title claims abstract description 118
- 238000001514 detection method Methods 0.000 claims abstract description 75
- 239000000843 powder Substances 0.000 claims abstract description 30
- 239000002817 coal dust Substances 0.000 claims abstract description 6
- 239000000779 smoke Substances 0.000 claims description 26
- 239000003638 chemical reducing agent Substances 0.000 claims description 7
- 238000012800 visualization Methods 0.000 claims description 5
- 230000001050 lubricating effect Effects 0.000 claims description 4
- 238000002485 combustion reaction Methods 0.000 description 12
- 238000000034 method Methods 0.000 description 9
- 239000007789 gas Substances 0.000 description 6
- 238000001228 spectrum Methods 0.000 description 6
- 238000010248 power generation Methods 0.000 description 5
- 102220213553 rs1026192345 Human genes 0.000 description 4
- 238000005461 lubrication Methods 0.000 description 3
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 206010021143 Hypoxia Diseases 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000035784 germination Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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- Crushing And Grinding (AREA)
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Abstract
The utility model relates to an intelligent coal mill system, which comprises a coal mill and a separator control device of the coal mill; the coal mill supplies coal dust to a boiler of the thermal power plant through at least 4 powder feeding pipes; at least 4 first temperature detection devices, wherein the at least 4 first temperature detection devices are respectively and correspondingly arranged on the furnace wall of the boiler so as to respectively monitor the temperature near the furnace wall; the fineness control device of the coal mill is in control connection with the at least 4 first temperature detection devices and is also in control connection with the separator control device; the separator control device can control and regulate the rotating speed and the angle of the blades of the separator according to the instruction of the fineness control device of the coal mill. The intelligent adjustment of the output, the air-coal ratio, the pulverized coal fineness and the uniformity of the powder pipe of the coal mill is realized.
Description
Technical Field
The utility model relates to the technical field of coal mills, in particular to an intelligent coal mill system.
Background
The 2022 coal power generation accounts for more than about half of the total amount of electricity generated in China, and still occupies a high proportion in the expected future.
The coal mill is an important part in thermal power generation, and most of automatic operation is realized in the current coal mill at thermal power factory, but can't solve the influence that the raw coal changes at any time according to the running state of boiler, and the change of coal quality influences the combustion efficiency and the burnout of boiler.
Meanwhile, the existing equipment cannot effectively judge the faults of the coal mill in time, cannot be perceived in advance, can only be judged according to experience, has high error rate, and easily causes the accident jump stop of the coal mill.
The application of the intelligent coal mill device in the thermal power plant can solve the influence of coal quality change on the combustion efficiency and burnout of the boiler, improve the boiler efficiency and burnout rate, reduce the emission of coal consumption, NOx and CO2, reduce the power generation cost, improve the economic benefit of the power plant, reduce the emission and make an friendly power generation enterprise
Accordingly, there is a need for an intelligent coal pulverizer system that addresses the foregoing issues.
Disclosure of utility model
The present utility model is directed to alleviating or solving at least one aspect or point of the problems discussed above.
According to one aspect of the utility model, an intelligent coal mill system is provided, which comprises a coal mill, a coal mill fineness control device and a coal mill separator control device;
the coal mill supplies coal dust to a boiler of the thermal power plant through at least 4 powder feeding pipes;
At least 4 first temperature detection devices, wherein the at least 4 first temperature detection devices are respectively and correspondingly arranged on furnace walls of the boiler so as to respectively monitor temperatures near the 4 furnace walls;
the fineness control device of the coal mill is in control connection with the at least 4 first temperature detection devices and is also in control connection with the separator control device;
The separator control device can control and regulate the rotating speed and the angle of the blades of the separator according to the instruction of the fineness control device of the coal mill.
Preferably, the method further comprises: the second temperature detection device is used for detecting the exhaust gas temperature of the boiler; the first smoke exhaust detection device is used for detecting the NOx content in smoke exhaust of the boiler; and the second smoke exhaust detection device is used for detecting the content of CO2 in smoke exhaust of the boiler.
Preferably, the fineness control device of the coal mill is in control connection with the second temperature detection device, the first smoke discharge detection device and the second smoke discharge detection device.
Preferably, the coal pulverizer further comprises a first pressure detection device for detecting the air outlet pressure of the coal pulverizer; the fan control device of the coal mill is in control connection with the first pressure detection device and controls the air quantity of the fan according to the signal of the first pressure detection device.
Preferably, the device also comprises vibration detection devices for detecting the vibration of the coal mill; and the sound detection device is used for detecting the sound spectrum of the coal mill.
Preferably, the method further comprises: the hydraulic system detection device is used for detecting the pressure, the temperature and the differential pressure of the hydraulic system of the coal mill.
Preferably, the method further comprises: and the lubricating system detection device is used for detecting oil pressure, oil temperature and differential pressure of the lubricating system.
Preferably, the method further comprises: the speed reducer system detection device is used for detecting the oil temperature and the differential pressure of the speed reducer system.
Preferably, the shape and the pipe diameter of the at least 4 powder feeding pipes are consistent.
Preferably, the at least 4 powder feeding pipes are uniformly arranged around the boiler in a surrounding mode and positioned on the same horizontal plane.
Preferably, the coal pulverizer further comprises a visualization device, wherein the visualization device is used for displaying the operation parameters of the coal pulverizer.
Preferably, 4 first temperature detecting means are provided at the boiler wall, respectively.
According to the utility model, by arranging a plurality of first temperature detection devices at the position of the boiler close to the boiler wall, the combustion deviation of the boiler is indirectly obtained through the temperature difference between the first temperature detection devices, and the fineness and uniformity index of the powder discharged from the coal mill and the powder quantity of 4 powder pipes are adjusted through the control device to control. Through the arrangement, the coal mill can carry out fine and intelligent auxiliary control on the combustion of the boiler, the combustion efficiency and burnout are improved, the purpose of reducing the exhaust gas temperature is achieved, the emission of coal consumption and pollutants is finally realized, and the power generation cost is reduced.
The utility model further provides a second temperature detection device for detecting the temperature of the discharged smoke, wherein the first discharged smoke detection device and the second discharged smoke detection device detect the content of NOx and CO2 and transmit the detection data to a coal mill fineness control device, and the coal mill fineness control device performs auxiliary control according to the data, so that the combustion efficiency of the boiler is improved.
Drawings
FIG. 1 is a schematic view of an exemplary intelligent coal pulverizer system of the present utility model.
FIG. 2 is a schematic diagram of a control method of an intelligent coal pulverizer system according to an exemplary embodiment of the present utility model.
Detailed Description
The following description of embodiments of the present utility model with reference to the accompanying drawings is intended to illustrate the general inventive concept and should not be taken as limiting the utility model. In the present utility model, the same reference numerals denote the same or similar components.
The features described herein may be embodied in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein have been provided to illustrate only some of the many possible ways to implement the methods, devices, and/or systems described herein that will be apparent after an understanding of the present disclosure.
Although terms such as "first," "second," and "third" may be used herein to describe various elements, components, regions, layers or sections, these elements, components, regions, layers or sections should not be limited by these terms. Rather, these terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section.
In the description, when an element (such as a layer, region or substrate) is referred to as being "on" another element, "connected to" or "coupled to" the other element, it can be directly "on" the other element, be directly "connected to" or be "coupled to" the other element, or one or more other elements intervening elements may be present. In contrast, when an element is referred to as being "directly on" or "directly connected to" or "directly coupled to" another element, there may be no other element intervening elements present.
The terminology used herein is for the purpose of describing various examples only and is not intended to be limiting of the disclosure. Singular forms also are intended to include plural forms unless the context clearly indicates otherwise. The terms "comprises," "comprising," and "having" specify the presence of stated features, amounts, operations, components, elements, and/or combinations thereof, but do not preclude the presence or addition of one or more other features, amounts, operations, components, elements, and/or combinations thereof.
In order to enable one skilled in the art to utilize the teachings of the present utility model, the following exemplary embodiments are presented in terms of particular application scenarios, particular system, device and component parameters and particular manner of connection. However, it will be apparent to those having ordinary skill in the art that these embodiments are merely examples, and that the general principles defined herein may be applied to other embodiments and applications without departing from the spirit and scope of the utility model.
According to an exemplary embodiment of the present utility model: as shown in fig. 1 and 2, an intelligent coal mill system comprises a coal mill, a coal mill fineness control device, a coal mill fan control device and a coal mill separator control device; the coal mill supplies coal dust to a boiler of the thermal power plant through at least 4 powder feeding pipes; in the utility model, the output ports of the 4 powder feeding pipes are arranged on the periphery of the boiler in a surrounding way. The shape and the size of the two layers are consistent and are positioned on the same horizontal plane. By the arrangement, the pulverized coal combustion environments sent out from the 4 powder feeding pipes are ensured to be approximately the same.
If the granularity of the pulverized coal sent out by the powder feeding pipe of the coal mill is uneven, the problems of insufficient combustion of part of the pulverized coal and low heat conversion efficiency of part of the pulverized coal combustion can exist during combustion. One of the existing treatment methods of the thermal power plant is to control the air supply of a boiler; and the air supply control is difficult to fundamentally solve the above problems. In the process of inputting the air powder into the boiler through the powder feeding pipe, the coal mill is difficult to detect the uniformity of the coal powder in real time.
According to the utility model, the uniformity of coal dust is indirectly determined in a temperature detection mode, at least 4 first temperature detection devices are arranged, and the at least 4 first temperature detection devices are respectively and correspondingly arranged on the outer walls of the boiler close to the 4 powder feeding pipes so as to respectively monitor the temperatures of the outer walls of the boiler close to the 4 powder feeding pipes. If the pulverized coal in the total powder feeding pipe is uneven, the pulverized coal can be divided into 4 branches, namely, the 4 powder feeding pipes have different pulverized coal contents, and when the powder feeding pipes spray the pulverized coal into a boiler, the temperature of the boiler wall close to the powder feeding pipes can be different. Through the detection of the temperatures at the different positions, whether the fineness or uniformity of the pulverized coal meets the requirements or not can be indirectly obtained.
If the maximum value of the difference value between any two temperature values of the temperatures detected by the 4 first temperature detection devices is smaller than a first threshold value, the uniformity of the coal dust is indicated, the requirements are met, and the fineness of the coal mill can not be adjusted; if the difference value is larger than the first threshold value, the uniformity of the pulverized coal is poor, and the fineness of the pulverized coal needs to be adjusted.
Optionally, the fineness control device of the coal mill is in control connection with the at least 4 first temperature detection devices and is also in control connection with the separator control device.
According to an exemplary embodiment of the present utility model: the utility model also includes: the second temperature detection device is used for detecting the exhaust gas temperature of the boiler; the first smoke exhaust detection device is used for detecting the NOx content in smoke exhaust of the boiler; and the second smoke exhaust detection device is used for detecting the content of CO2 in smoke exhaust of the boiler. When the pulverized coal fineness adjustment is carried out, the parameters are detected in real time, and the change of the parameter values is recorded. And correspondingly analyzing the relation of the fineness of the pulverized coal and the detection value, and optionally, constructing the corresponding relation by adopting a fitting curve mode, wherein when the parameters are required to be controlled in the later period, the control can be performed through fineness adjustment.
According to an exemplary embodiment of the present utility model: the fineness control device of the coal mill is in control connection with the second temperature detection device, the first smoke discharge detection device and the second smoke discharge detection device; judging whether the content of NOx detected by the first smoke exhaust detection device and the content of CO2 detected by the second smoke exhaust detection device are within a preset range or not, and if not, adjusting the fineness of the boiler through a control device of the boiler, and adjusting the fineness of the boiler through a fineness control device of the coal mill so as to meet the requirements.
According to an exemplary embodiment of the present utility model: the utility model also includes: the vibration detection device is used for detecting the vibration of the coal mill, the sound spectrum detection device is used for detecting the sound spectrum of the coal mill, and the parameters are used for judging whether the coal mill normally operates.
According to an exemplary embodiment of the present utility model: the utility model further comprises a hydraulic system detection device which is used for detecting the pressure, the temperature and the differential pressure of the hydraulic system of the coal mill.
The utility model also comprises a lubrication system detection device for detecting the oil pressure, the oil temperature and the differential pressure of the lubrication system.
The utility model also comprises a speed reducer system detection device which is used for detecting the oil temperature, vibration and sound spectrum of the speed reducer system.
And judging whether the parameter is abnormal or not through real-time detection and comparison of the parameter with a standard range value, and performing intervention treatment in time when the abnormality is found. Thereby ensuring the normal operation of the coal mill. The utility model controls the operation state of the coal mill through the operation parameters of the coal mill.
According to an exemplary embodiment of the present utility model: the utility model also comprises a visualization device which is used for displaying the operation parameters of the coal mill and preferably displaying the operation parameters by means of image colors, such as displaying whether the coal mill is in a normal operation range or not by adopting different color depths. The visual device can display the output, wind-coal ratio, electricity consumption, vibration, sound spectrum and abrasion condition of the coal mill; the temperature, pressure and differential pressure conditions of the wind-powder mixture can be displayed; displaying the fineness condition of the wind powder. Displaying oil pressure, oil temperature and differential pressure of the lubrication system; displaying oil temperature, vibration and sound spectrum of the speed reducer system; displaying the pressure, temperature and differential pressure of the hydraulic system; and the running state of the coal mill is displayed in a preferable mode of adopting image colors so as to more intuitively display the running state and health condition of the coal mill. The problems are found in time, faults are processed in the germination period in time, and losses caused by the faults are reduced. The unmanned inspection is realized, and the machine set is operated without opening the door and entering the inspection coal mill, so that personnel injury caused by accidents is prevented, and the oxygen deficiency and high temperature injury of the closed space are prevented.
The operation of the utility model is described below with reference to fig. 2: the method comprises the following steps:
S1: at least 4 first temperature detection devices detect the wall temperature of the boiler, which is close to at least 4 powder feeding pipes, a second temperature detection device detects the exhaust gas temperature, the first exhaust gas detection device detects the NOx content, and the second exhaust gas detection device detects the CO2 content;
s2: the fineness control device of the coal mill receives temperature information detected by the first temperature detection device and the second temperature detection device and content information of NOx and CO 2;
S31A judges whether the maximum value of the difference value between any two temperature values of the temperatures detected by the first temperature detection device is larger than a first threshold value;
S31B, judging whether the detected temperature of the second temperature detection device and the contents of NOx and CO2 are within a preset range;
if the judgment result of the step S31A is yes, the step S4 is entered; if the judgment result of the step S31B is no, the step S32 is entered;
S32: judging whether the fineness of the coal mill is used for controlling; if yes, go to step S4; if not, go to step S33;
s33: adjusting by a boiler control system;
S4: the separator control device of the coal mill sends out a control instruction according to the received information;
s5: the rotational speed and angle of the separator blades are adjusted.
According to an exemplary embodiment of the present utility model, when the judgment result of S31A is yes and the judgment result of S32 is also yes, the separator control device of the coal mill preferably performs control according to the information in S31A.
According to the utility model, the uniformity of the powder output of the coal mill is indirectly obtained through the temperature difference between the first temperature detection devices by arranging the plurality of first temperature detection devices at the position, close to the outer wall of the powder feeding pipe, of the boiler, so that the fineness of the coal mill is controlled through the fineness control device of the coal mill. Through the arrangement, the combustion of the boiler can be controlled through the coal mill, and the control cost of directly controlling the boiler is reduced.
The utility model further provides a second temperature detection device for detecting the temperature of the discharged smoke, wherein the first discharged smoke detection device and the second discharged smoke detection device detect the content of NOx and CO2 and transmit the detection data to a coal mill fineness control device, and the coal mill fineness control device performs auxiliary control according to the data, so that the combustion efficiency of the boiler is improved.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes may be made and equivalents may be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. An intelligent coal pulverizer system, its characterized in that: comprises a coal mill, a fineness control device of the coal mill and a separator control device of the coal mill;
the coal mill supplies coal dust to a boiler of the thermal power plant through at least 4 powder feeding pipes;
At least 4 first temperature detection devices, wherein the at least 4 first temperature detection devices are respectively and correspondingly arranged on the furnace wall of the boiler so as to respectively monitor the temperatures of the furnace walls close to the 4 powder feeding pipes;
the fineness control device of the coal mill is in control connection with the at least 4 first temperature detection devices and is also in control connection with the separator control device;
The separator control device can control and regulate the rotating speed and the angle of the blades of the separator according to the instruction of the fineness control device of the coal mill.
2. The coal pulverizer system of claim 1, wherein: further comprises: the second temperature detection device is used for detecting the exhaust gas temperature of the boiler; the first smoke exhaust detection device is used for detecting the NOx content in smoke exhaust of the boiler; and the second smoke exhaust detection device is used for detecting the content of CO2 in smoke exhaust of the boiler.
3. The coal pulverizer system of claim 2, wherein: the fineness control device of the coal mill is in control connection with the second temperature detection device, the first smoke discharge detection device and the second smoke discharge detection device.
4. The coal pulverizer system of claim 1 or 2, wherein: the first pressure detection device is used for detecting the air outlet pressure of the coal mill; the fan control device of the coal mill is in control connection with the first pressure detection device and controls the air quantity of the fan according to the signal of the first pressure detection device.
5. The coal pulverizer system of claim 1 or 2, wherein: further comprises: and the lubricating system detection device is used for detecting oil pressure, oil temperature and differential pressure of the lubricating system.
6. The coal pulverizer system of claim 1 or 2, wherein: further comprises: the speed reducer system detection device is used for detecting the oil temperature and the differential pressure of the speed reducer system.
7. The coal pulverizer system of claim 1 or 2, wherein: the shape and the pipe diameter of the at least 4 powder feeding pipes are consistent.
8. The coal pulverizer system of claim 1 or 2, wherein: the at least 4 powder feeding pipes are uniformly arranged around the boiler in a surrounding mode and are positioned on the same horizontal plane.
9. The coal pulverizer system of claim 1 or 2, wherein: the coal pulverizer also comprises a visualization device, wherein the visualization device is used for displaying the operation parameters of the coal pulverizer.
10. The coal pulverizer system of claim 1 or 2, wherein: the 4 first temperature detection devices are respectively arranged at the furnace walls of the boiler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321955175.9U CN221063060U (en) | 2023-07-24 | 2023-07-24 | Intelligent coal mill system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321955175.9U CN221063060U (en) | 2023-07-24 | 2023-07-24 | Intelligent coal mill system |
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| Publication Number | Publication Date |
|---|---|
| CN221063060U true CN221063060U (en) | 2024-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321955175.9U Active CN221063060U (en) | 2023-07-24 | 2023-07-24 | Intelligent coal mill system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221063060U (en) |
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2023
- 2023-07-24 CN CN202321955175.9U patent/CN221063060U/en active Active
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