CN113578508B - Logic optimization method, device and system for protecting air volume at inlet of coal mill - Google Patents
Logic optimization method, device and system for protecting air volume at inlet of coal mill Download PDFInfo
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- CN113578508B CN113578508B CN202110797487.0A CN202110797487A CN113578508B CN 113578508 B CN113578508 B CN 113578508B CN 202110797487 A CN202110797487 A CN 202110797487A CN 113578508 B CN113578508 B CN 113578508B
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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
- B02C23/04—Safety devices
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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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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Abstract
The invention is suitable for the technical field of coal mills, and provides a logic optimization method, a device and a system for protecting the air volume at an inlet of a coal mill, wherein the method comprises the following steps: acquiring a wind volume monitoring value of a wind volume monitoring point at an inlet of the coal mill and a pressure value of a pressure monitoring point at an outlet of the coal mill; if the air volume monitoring value is smaller than a first air volume threshold value, triggering an inlet air volume low signal; if the pressure value meets the pressure abnormity condition, triggering a pressure abnormity signal; if the inlet air volume low signal and the pressure abnormal signal are obtained simultaneously, triggering a coal mill trip protection action; and if the inlet air volume low signal is acquired but the pressure abnormal signal is not acquired, triggering an air volume abnormal alarm action. By the method, the low air volume protection logic can be optimized, and the vicious event caused by the false operation of the low air volume protection on the coal mill is avoided.
Description
Technical Field
The invention belongs to the technical field of coal mills, and particularly relates to a coal mill inlet air volume protection logic optimization method, device and system.
Background
The direct-blowing coal mill of the thermal power plant blows coal powder into a hearth through a hot air system, the coal powder enters the hearth to directly influence a combustion system, an air quantity measuring point is generally installed at an inlet of the coal mill, the air quantity of the hot air system is reduced to directly influence the combustion of the hearth, and meanwhile, the coal blockage is caused to further threaten the safety of equipment, so that the coal mill system requires to design a protection function of low inlet air quantity, and the tripping protection of the coal mill is triggered when the air quantity is low.
However, when the hot air system of the coal mill runs for a long time, the blockage of the air quantity sampling device cannot be avoided, the air quantity display fluctuation is large after the device is blocked, the probability of false operation of the low air quantity protection of the coal mill is large, and serious events such as tripping operation, load limitation and the like of the coal mill are caused.
Disclosure of Invention
In view of this, embodiments of the present invention provide a method, an apparatus, and a system for optimizing coal mill inlet air volume protection logic, so as to solve a problem in the prior art that an air volume low protection malfunction causes a malignant event to a coal mill.
The first aspect of the embodiment of the invention provides a logic optimization method for protecting air volume at an inlet of a coal mill, which comprises the following steps:
acquiring a wind volume monitoring value of a wind volume monitoring point at an inlet of the coal mill and a pressure value of a pressure monitoring point at an outlet of the coal mill;
if the air volume monitoring value is smaller than a first air volume threshold value, triggering an inlet air volume low signal;
if the pressure value meets the pressure abnormity condition, triggering a pressure abnormity signal;
if the inlet air volume low signal and the pressure abnormal signal are obtained simultaneously, triggering a coal mill trip protection action;
and if the inlet air volume low signal is acquired but the pressure abnormal signal is not acquired, triggering an air volume abnormal alarm action.
A second aspect of the embodiments of the present invention provides a coal mill inlet air volume protection logic optimization apparatus, including:
the data acquisition module is used for acquiring a wind volume monitoring value of a wind volume monitoring point at the inlet of the coal mill and a pressure value of a pressure monitoring point at the outlet of the coal mill;
the inlet air volume low signal acquisition module is used for triggering an inlet air volume low signal if the air volume monitoring value is smaller than a first air volume threshold value;
the pressure abnormal signal acquisition module is used for triggering a pressure abnormal signal if the pressure value meets a pressure abnormal condition;
the trip protection module is used for triggering the trip protection action of the coal mill if the inlet air volume low signal and the pressure abnormal signal are obtained simultaneously;
and the air volume abnormity alarm module is used for triggering an air volume abnormity alarm action if the inlet air volume low signal is acquired but the pressure abnormity signal is not acquired.
A third aspect of the embodiments of the present invention provides a terminal device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor implements the steps of the coal mill inlet air volume protection logic optimization method as described above when executing the computer program.
A fourth aspect of an embodiment of the present invention provides a computer-readable storage medium storing a computer program which, when executed by a processor, implements the steps of the coal mill inlet air volume protection logic optimization method described above.
A fifth aspect of the embodiments of the present invention provides a coal mill inlet air volume protection logic optimization system, which includes: the system comprises an air volume monitoring device arranged at an inlet of the coal mill, a pressure monitoring device arranged at an outlet of the coal mill, a micro-positive pressure device arranged near the pressure monitoring device, a protection input button and the terminal equipment;
the air volume monitoring device, the pressure monitoring device, the micro-positive pressure device and the protection input button are respectively connected with the terminal equipment;
the air quantity monitoring device is used for acquiring an air quantity monitoring signal of an air quantity monitoring point at the inlet of the coal mill;
the pressure monitoring device is used for acquiring a pressure monitoring signal of a pressure monitoring point at the outlet of the coal mill;
the micro-positive pressure device is used for providing a micro-positive pressure environment for the pressure monitoring point;
and the terminal equipment is used for obtaining an air volume monitoring value according to the air volume monitoring signal, obtaining a pressure value according to the pressure monitoring signal and carrying out coal mill inlet air volume protection logic judgment according to the air volume monitoring value and the pressure value.
Compared with the prior art, the embodiment of the invention has the following beneficial effects: the method comprises the steps of obtaining a wind volume monitoring value of a wind volume monitoring point at an inlet of the coal mill and a pressure value of a pressure monitoring point at an outlet of the coal mill; if the air volume monitoring value is smaller than a first air volume threshold value, triggering an inlet air volume low signal; if the pressure value meets the pressure abnormity condition, triggering a pressure abnormity signal; if the inlet air volume low signal and the pressure abnormal signal are obtained simultaneously, triggering a coal mill trip protection action; and if the inlet air volume low signal is acquired but the pressure abnormal signal is not acquired, triggering an air volume abnormal alarm action. By the method, the low air volume protection logic can be optimized, and the vicious event caused by the false operation of the low air volume protection on the coal mill is avoided.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1 is a schematic flow chart of a method for logic optimization of coal mill inlet air volume protection provided by an embodiment of the invention;
FIG. 2 is a diagram of distribution of test points of a hot air system of a coal mill provided by an embodiment of the invention;
FIG. 3 is a schematic diagram of a logic optimization device for protecting the inlet air volume of a coal mill provided by an embodiment of the invention;
fig. 4 is a schematic diagram of a terminal device according to an embodiment of the present invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
In order to explain the technical means of the present invention, the following description will be given by way of specific examples.
In an embodiment, as shown in fig. 1, fig. 1 shows an implementation flow of the coal mill inlet air volume protection logic optimization method provided by this embodiment, and a process thereof is detailed as follows:
s101: and acquiring the air quantity monitoring value of the air quantity monitoring point at the inlet of the coal mill and the pressure value of the pressure monitoring point at the outlet of the coal mill.
In the embodiment, as shown in fig. 2, fig. 2 shows a coal mill hot air system measuring point distribution diagram, wherein FT01 represents a coal mill inlet air quantity monitoring point, and PT01-PT06 represents a coal mill outlet pressure monitoring point.
Specifically, the air volume monitoring points are arranged on the straight pipe section meeting the requirements, and aiming at the problem that the straight pipe section of the hot air duct of the direct-blowing coal mill is limited on site, only one air volume monitoring point is arranged on the straight pipe section at the inlet of the direct-blowing coal mill in the embodiment. The air quantity monitoring device is arranged at the air quantity monitoring point, the pressure monitoring device is arranged at the pressure monitoring point at the outlet of the coal mill, and the pressure monitoring points can be arranged in a plurality.
The main execution body of this embodiment is a DCS (Distributed Control System). The DCS system is respectively connected with the air quantity monitoring device and the pressure monitoring device, the air quantity monitoring device is used for detecting and sending an air quantity monitoring signal to the DCS system, and the pressure monitoring device is used for detecting and sending a pressure monitoring signal to the DCS system.
The DCS obtains an air volume monitoring value according to the air volume monitoring signal and obtains a pressure value according to the pressure monitoring signal. And performing subsequent calculation according to the air quantity monitoring value and the pressure value.
S102: and if the air volume monitoring value is smaller than a first air volume threshold value, triggering an inlet air volume low signal.
S103: and if the pressure value meets the pressure abnormity condition, triggering a pressure abnormity signal.
S104: and if the inlet air volume low signal and the pressure abnormal signal are acquired simultaneously, triggering the tripping protection action of the coal mill.
In the embodiment, the hot air system flow of the coal mill is fully considered, under normal conditions, the outlet pressure of the coal mill is simultaneously reduced when the inlet air volume is low, and based on the phenomenon, the embodiment optimizes the logic configuration, and performs the AND operation of the low air volume signal and the low outlet pressure to determine whether to trigger the tripping protection action of the coal mill.
In this embodiment, if the pressure value is smaller than the preset pressure threshold, the pressure abnormality signal is triggered.
S105: and if the inlet air volume low signal is acquired but the pressure abnormal signal is not acquired, triggering an air volume abnormal alarm action.
In this embodiment, if the air volume monitoring value of the inlet air volume monitoring point triggers an inlet air volume low signal, but the pressure abnormal signal is not monitored, it is described that the monitoring result of the inlet air volume low is doubtful, so that the tripping protection action of the coal mill is not triggered, but an air volume abnormal alarm action is generated, thereby not only avoiding the tripping error protection of the coal mill, but also timely reminding workers of abnormal air volume monitoring, timely solving the abnormal event and ensuring the safe and stable operation of the coal mill.
In one embodiment, if the abnormal air quantity alarm action is triggered, the tripping protection action of the coal mill is locked.
In this embodiment, if the abnormal air volume alarm is triggered, the triggering mechanism of the trip protection action of the coal pulverizer is turned off in the abnormal air volume alarm triggering stage.
In one embodiment, the pressure monitoring points comprise a plurality;
the pressure abnormal condition is that the number of the pressure monitoring points with the pressure values smaller than the preset pressure threshold value is larger than or equal to the preset number.
Illustratively, the number of outlet pressure monitoring points of a single coal mill is 6, the outlet pressure monitoring points are sent to a DCS (distributed control system) for analog quantity display, the preset number can be 3, namely, when 3 or more outlet pressure monitoring points are lower than a preset pressure threshold value, a pressure abnormal signal is triggered.
Specifically, the pressure anomaly signal is a coal mill outlet pressure low signal, and the preset pressure threshold value can be 0.6Kpa.
In one embodiment, the method provided in this embodiment further includes:
and if the air volume monitoring signal of the air volume monitoring point does not meet the preset quality condition or the change rate of the air volume monitoring value exceeds the preset rate range, triggering an air volume abnormity alarm action and locking the tripping protection action of the coal mill.
In one embodiment, the predetermined quality condition includes:
and the voltage value of the air volume monitoring signal is within a preset voltage range.
In this embodiment, the DCS system may perform quality monitoring on the air volume monitoring signal, and when the voltage value of the air volume monitoring signal exceeds the preset voltage range, determine that the quality of the air volume monitoring signal is bad/por, otherwise, determine that the quality of the air volume monitoring signal is good. When the quality of the air quantity monitoring signal is bad/por, the DCS triggers an air quantity abnormal alarm action and locks a coal mill tripping protection action, namely when the quality of the air quantity monitoring signal is bad/por, the DCS does not control tripping of the coal mill no matter what the air quantity monitoring value and the pressure value are.
In this embodiment, in addition to the quality monitoring of the air volume signal, the DCS system may determine whether the air volume is abnormal according to a variation rate of the air volume monitoring value, and when the air volume monitoring device is blocked, the air volume monitoring value may have an obvious jump, so that whether to trigger an air volume abnormality alarm operation may be determined by determining whether the air volume variation rate is abnormal.
In this embodiment, when it is monitored that the air volume monitoring signal does not satisfy the preset quality condition or the variation rate of the air volume monitoring value exceeds the preset rate range, an air volume abnormality alarm action is triggered;
or when the inlet air volume low signal is acquired but the pressure abnormal signal is not acquired, and the air volume monitoring signal is monitored not to meet the preset quality condition or the change rate of the air volume monitoring value exceeds the preset rate range, triggering an air volume abnormal alarm action.
In an embodiment, the method for logic optimization of coal mill inlet air volume protection provided in this embodiment further includes:
and if the protection input button is monitored to be closed, triggering the tripping protection action of the coal mill.
In this embodiment, the protection input button can manually realize the exit and the input of the protection function, and if the DCS system monitors that the protection input button is in the exit state, the trip protection action of the coal mill is directly triggered.
By the method, the misoperation of low air volume protection of the coal mill can be thoroughly avoided, and the abnormal change condition of the air volume of the coal mill can be noticed by operators at the first time by improving the sound-light alarm function, so that the safe and stable operation of the coal mill is ensured.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
In one embodiment, as shown in fig. 3, fig. 3 shows a structure of a coal mill inlet air volume protection logic optimization device 100 provided by the present embodiment, which includes:
the data acquisition module 110 is used for acquiring a wind volume monitoring value of a wind volume monitoring point at an inlet of the coal mill and a pressure value of a pressure monitoring point at an outlet of the coal mill;
an inlet air volume low signal obtaining module 120, configured to trigger an inlet air volume low signal if the air volume monitoring value is smaller than a first air volume threshold value;
a pressure abnormal signal obtaining module 130, configured to trigger a pressure abnormal signal if the pressure value satisfies a pressure abnormal condition;
the trip protection module 140 is configured to trigger a trip protection action of the coal pulverizer if the inlet air volume low signal and the pressure abnormal signal are simultaneously obtained;
and an air volume abnormality alarm module 150, configured to trigger an air volume abnormality alarm if the inlet air volume low signal is obtained but the pressure abnormality signal is not obtained.
In one embodiment, if the abnormal air quantity alarm action is triggered, the tripping protection action of the coal mill is locked.
In one embodiment, the pressure monitoring points comprise a plurality;
the pressure abnormal condition is that the number of the pressure monitoring points with the pressure values smaller than the preset pressure threshold value is larger than or equal to the preset number.
In one embodiment, the apparatus 100 provided in this embodiment further includes:
and the second air quantity abnormity alarm module is used for triggering an air quantity abnormity alarm action and locking the coal mill tripping protection action if the air quantity monitoring signal of the air quantity monitoring point does not meet the preset quality condition or the change rate of the air quantity monitoring value exceeds the preset rate range.
In one embodiment, the predetermined quality condition includes: and the voltage value of the air volume monitoring signal is within a preset voltage range.
In one embodiment, the apparatus 100 provided in this embodiment further includes:
and the protection input button using module is used for triggering the tripping protection action of the coal mill if the protection input button is monitored to be closed.
The embodiment of the invention provides a coal mill inlet air volume protection logic optimization system, which comprises an air volume monitoring device arranged at an inlet of a coal mill, a pressure monitoring device arranged at an outlet of the coal mill, a micro-positive pressure device arranged near the pressure monitoring device, a protection input button and the terminal equipment;
the air volume monitoring device, the pressure monitoring device, the micro-positive pressure device and the protection input button are respectively connected with the terminal equipment;
the air quantity monitoring device is used for acquiring an air quantity monitoring signal of an air quantity monitoring point at the inlet of the coal mill;
the pressure monitoring device is used for acquiring a pressure monitoring signal of a pressure monitoring point at the outlet of the coal mill;
the micro-positive pressure device is used for providing a micro-positive pressure environment for the pressure monitoring point;
and the terminal equipment is used for obtaining an air volume monitoring value according to the air volume monitoring signal, obtaining a pressure value according to the pressure monitoring signal and carrying out coal mill inlet air volume protection logic judgment according to the air volume monitoring value and the pressure value.
In this embodiment, the air volume monitoring device may be a pitot tube, and the pressure monitoring device may be a differential pressure transmitter. The continuous purging micro-positive pressure device is used for providing a micro-positive pressure environment for the pressure monitoring points, preventing a sampling pipeline from being blocked and improving the reliability of the pressure measuring points.
Fig. 4 is a schematic diagram of a terminal device according to an embodiment of the present invention. As shown in fig. 4, the terminal device 4 of this embodiment includes: a processor 40, a memory 41 and a computer program 42 stored in said memory 41 and executable on said processor 40. The processor 40, when executing the computer program 42, implements the steps in the various coal mill inlet air volume protection logic optimization method embodiments described above, such as steps 101 through 105 shown in fig. 1. Alternatively, the processor 40, when executing the computer program 42, implements the functions of the modules/units in the above-mentioned device embodiments, such as the modules 110 to 150 shown in fig. 3.
The computer program 42 may be partitioned into one or more modules/units that are stored in the memory 41 and executed by the processor 40 to implement the present invention. The one or more modules/units may be a series of computer program instruction segments capable of performing specific functions, which are used to describe the execution process of the computer program 42 in the terminal device 4.
The terminal device 4 may be a desktop computer, a notebook, a palm computer, a cloud server, or other computing devices. The terminal device may include, but is not limited to, a processor 40, a memory 41. Those skilled in the art will appreciate that fig. 4 is merely an example of a terminal device 4 and does not constitute a limitation of terminal device 4 and may include more or fewer components than shown, or some components may be combined, or different components, e.g., the terminal device may also include input-output devices, network access devices, buses, etc.
The Processor 40 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 41 may be an internal storage unit of the terminal device 4, such as a hard disk or a memory of the terminal device 4. The memory 41 may also be an external storage device of the terminal device 4, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like, which are provided on the terminal device 4. Further, the memory 41 may also include both an internal storage unit and an external storage device of the terminal device 4. The memory 41 is used for storing the computer program and other programs and data required by the terminal device. The memory 41 may also be used to temporarily store data that has been output or is to be output.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus/terminal device and method may be implemented in other ways. For example, the above-described embodiments of the apparatus/terminal device are merely illustrative, and for example, the division of the modules or units is only one logical division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated modules/units, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow of the method according to the embodiments of the present invention may also be implemented by a computer program, which may be stored in a computer-readable storage medium, and when the computer program is executed by a processor, the steps of the method embodiments may be implemented. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, read-Only Memory (ROM), random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the computer readable medium may contain content that is subject to appropriate increase or decrease as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media does not include electrical carrier signals and telecommunications signals as is required by legislation and patent practice.
The above-mentioned embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein.
Claims (10)
1. A logic optimization method for protecting the air volume at the inlet of a coal mill is characterized by comprising the following steps:
acquiring a wind volume monitoring value of a wind volume monitoring point at an inlet of the coal mill and a pressure value of a pressure monitoring point at an outlet of the coal mill;
if the air volume monitoring value is smaller than a first air volume threshold value, triggering an inlet air volume low signal;
if the pressure value meets the pressure abnormity condition, triggering a pressure abnormity signal;
if the inlet air volume low signal and the pressure abnormal signal are obtained simultaneously, triggering a coal mill trip protection action;
and if the inlet air volume low signal is acquired but the pressure abnormal signal is not acquired, triggering an air volume abnormal alarm action.
2. The method of optimizing logic for protecting coal pulverizer inlet air volume of claim 1, further comprising:
and if the abnormal air volume alarm action is triggered, locking the tripping protection action of the coal mill.
3. The method of optimizing coal pulverizer inlet air volume protection logic of claim 1, wherein the pressure monitoring points comprise a plurality;
the pressure abnormal condition is that the number of the pressure monitoring points with the pressure values smaller than the preset pressure threshold value is larger than or equal to the preset number.
4. The method of optimizing logic for protecting coal pulverizer inlet air volume of claim 1, further comprising:
and if the air volume monitoring signal of the air volume monitoring point does not meet the preset quality condition or the change rate of the air volume monitoring value exceeds the preset rate range, triggering an air volume abnormity alarm action and locking the tripping protection action of the coal mill.
5. The method of optimizing logic for protecting coal pulverizer inlet air volume according to claim 4, wherein the predetermined quality conditions include:
and the voltage value of the air volume monitoring signal is within a preset voltage range.
6. The method of optimizing logic for protecting coal pulverizer inlet air volume of claim 1, further comprising:
and if the protection input button is monitored to be closed, triggering the tripping protection action of the coal mill.
7. The utility model provides a coal pulverizer entry amount of wind protection logic optimizing apparatus which characterized in that includes:
the data acquisition module is used for acquiring a wind volume monitoring value of a wind volume monitoring point at the inlet of the coal mill and a pressure value of a pressure monitoring point at the outlet of the coal mill;
the inlet air volume low signal acquisition module is used for triggering an inlet air volume low signal if the air volume monitoring value is smaller than a first air volume threshold value;
the pressure abnormal signal acquisition module is used for triggering a pressure abnormal signal if the pressure value meets a pressure abnormal condition;
the trip protection module is used for triggering the trip protection action of the coal mill if the inlet air volume low signal and the pressure abnormal signal are obtained simultaneously;
and the air quantity abnormity alarm module is used for triggering an air quantity abnormity alarm action if the inlet air quantity low signal is acquired but the pressure abnormity signal is not acquired.
8. A terminal device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the steps of the method according to any of claims 1 to 6 when executing the computer program.
9. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 6.
10. A coal mill inlet air volume protection logic optimization system is characterized by comprising: an air volume monitoring device arranged at an inlet of a coal mill, a pressure monitoring device arranged at an outlet of the coal mill, a micro-positive pressure device arranged near the pressure monitoring device, a protection input button and the terminal equipment according to claim 8;
the air volume monitoring device, the pressure monitoring device, the micro-positive pressure device and the protection input button are respectively connected with the terminal equipment;
the air quantity monitoring device is used for acquiring an air quantity monitoring signal of an air quantity monitoring point at the inlet of the coal mill;
the pressure monitoring device is used for acquiring a pressure monitoring signal of a pressure monitoring point at the outlet of the coal mill;
the micro-positive pressure device is used for providing a micro-positive pressure environment for the pressure monitoring point;
and the terminal equipment is used for obtaining an air volume monitoring value according to the air volume monitoring signal, obtaining a pressure value according to the pressure monitoring signal and carrying out coal mill inlet air volume protection logic judgment according to the air volume monitoring value and the pressure value.
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| CN110918242B (en) * | 2019-10-18 | 2021-09-17 | 华创三立(北京)能源科技有限公司 | Coal mill monitoring and early warning method and system |
| CN111135944A (en) * | 2019-12-06 | 2020-05-12 | 华北电力科学研究院有限责任公司 | Method and system for determining coal blockage of coal mill of power station boiler |
| CN112115602B (en) * | 2020-09-14 | 2024-02-02 | 北京博望华科科技有限公司 | Coal mill pipeline blocking state determining method and device, storage medium and computing equipment |
| CN112536145B (en) * | 2020-11-20 | 2022-06-21 | 西安热工研究院有限公司 | Medium-speed coal mill operation safety on-line monitoring and early warning system and method |
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