CN112799362A - Pneumatic ash conveying abnormal state diagnosis and fault early warning method - Google Patents
Pneumatic ash conveying abnormal state diagnosis and fault early warning method Download PDFInfo
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- CN112799362A CN112799362A CN202011630349.5A CN202011630349A CN112799362A CN 112799362 A CN112799362 A CN 112799362A CN 202011630349 A CN202011630349 A CN 202011630349A CN 112799362 A CN112799362 A CN 112799362A
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- ash conveying
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS], computer integrated manufacturing [CIM]
- G05B19/4184—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS], computer integrated manufacturing [CIM] characterised by fault tolerance, reliability of production system
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/31—From computer integrated manufacturing till monitoring
- G05B2219/31088—Network communication between supervisor and cell, machine group
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Abstract
The invention provides a pneumatic ash conveying abnormal state diagnosis and fault early warning method, which is characterized in that an ash conveying abnormal self-diagnosis early warning model is established on the basis of an ash conveying DCS control system monitoring platform, the pneumatic ash conveying abnormal state diagnosis is carried out, and an alarm is sent out in real time. The invention collects ash conveying parameters based on DCS and establishes a state judgment monitoring model, thereby greatly reducing the monitoring intensity of ash conveying operators and improving the timeliness of defect discovery; the reliability and the automation level of the ash conveying system are improved, and the smoke emission of the thermal power plant is ensured to meet the environmental protection regulations; and faults can be found, judged and early warned in time. The system can be ensured to run safely, the energy consumption is reduced, and a basis is provided for state maintenance.
Description
Technical Field
The invention belongs to the field of program control protection of thermal power plants, and particularly relates to a pneumatic ash conveying abnormal state diagnosis and fault early warning method.
Background
The control of present coal fired power plant ash conveying system relies on to predetermine the parameter and carries out automatic control ash conveying basically, appears stifled pipe when ash conveying system operation, and the valve is revealed, is stuck, can not in time discover, can lead to ash conveying system transport efficiency to descend, and the energy consumption increases, because of ash conveying untimely, the serious person probably leads to electric precipitation ash bucket grey level to rise, influences electric precipitation safe operation. The ash conveying system of the power plant can not be timely found and treated after system abnormality occurs in the ash conveying operation, so that the ash conveying system is stopped and equipment is damaged.
Therefore, it is an urgent need to solve the above problems by those skilled in the art to develop a method for diagnosing, discovering and alarming various abnormal conditions during ash transportation operation of a power plant.
Disclosure of Invention
In order to solve the problems, the invention discloses a pneumatic ash conveying abnormal state diagnosis and fault alarm method.
In order to achieve the purpose, the invention provides the following technical scheme:
a pneumatic ash conveying abnormal state diagnosis and fault early warning method is characterized in that an ash conveying abnormal self-diagnosis early warning model is established on the basis of an ash conveying DCS control system monitoring platform, pneumatic ash conveying abnormal state diagnosis is carried out, and an alarm is given out in real time.
Further, the diagnosis of the abnormal state of the pneumatic ash conveying comprises the diagnosis of conveying overtime, the diagnosis of pressurizing leakage, the diagnosis of system pressure overpressure and the diagnosis of abnormal valve jam.
Further, the specific method of delivery timeout diagnosis is as follows:
installing a pressure transmitter at each conveying main pipe of the ash conveying system, measuring the pressure of the conveying main pipe in real time, and transmitting the pressure to a DCS (distributed control system) for recording;
setting a conveying maximum set time TS1 of the ash conveying system and a net set pressure value PK1 of the air pipe;
when the conveying time exceeds the maximum set time TS1 and the pressure value detected by the pressure transmitter is greater than PK1, the pipe blockage in the current conveying main pipe is judged, and the pipe blockage alarm is triggered.
Further, the specific method for diagnosing the charge leakage is as follows:
a pressure transmitter is arranged in front of a discharge valve of a conveying bin pump unit group and used for measuring the sealing property of a conveying unit in a stamping fluidization stage;
setting the maximum set time TS2 for fluidizing and pressurizing compressed air and the lowest set pressure value PK2 of the ash conveying bin pump set;
when the fluidization pressurization time exceeds the maximum set time TS2 and the pressure value of the ash conveying bin pump set detected by the pressure transmitter is smaller than PK2, judging that the current system valve has an internal leakage phenomenon, and triggering the ash conveying bin pump set to perform stamping leakage alarm.
Further, the specific method for diagnosing the system pressure overpressure is as follows:
setting a highest set pressure value PK3 of the ash conveying bin pump set;
when the pressure value of the ash conveying bin pump group detected by the pressure transmitter is larger than PK3, judging that the current system has an overpressure fault, and triggering overpressure alarm.
Further, the specific method for diagnosing the abnormal valve jamming includes the following steps:
a position feedback detection switch is arranged on a pneumatic control valve of each ash conveying bin pump group, a position feedback signal is transmitted to a DCS control system, and feedback detection time TS3 is set;
when the DCS control system receives the position feedback signal within the feedback detection time TS3, the valve jam fault alarm is triggered.
Compared with the prior art, the invention has the following beneficial effects:
1. collecting ash conveying parameters based on DCS, and establishing a state judgment monitoring model, thereby greatly reducing the monitoring intensity of ash conveying operators and improving the timeliness of defect discovery;
2. the reliability and the automation level of the ash conveying system are improved, and the smoke emission of the thermal power plant is ensured to meet the environmental protection regulations;
3. and faults can be found, judged and early warned in time. The system can be ensured to run safely, the energy consumption is reduced, and a basis is provided for state maintenance.
Drawings
FIG. 1 is a flow chart of delivery timeout diagnostics in the present invention;
FIG. 2 is a flow chart of the present invention for diagnosing a charge leakage;
FIG. 3 is a flow chart of the system pressure overpressure diagnostic of the present invention;
fig. 4 is a flow chart of valve sticking anomaly diagnosis in the present invention.
Detailed Description
The technical solutions provided by the present invention will be described in detail below with reference to specific examples, and it should be understood that the following specific embodiments are only illustrative of the present invention and are not intended to limit the scope of the present invention.
The invention provides a pneumatic ash conveying abnormal state diagnosis and fault early warning method, which is characterized in that an ash conveying abnormal self-diagnosis early warning model is established on the basis of an ash conveying DCS control system monitoring platform, the pneumatic ash conveying abnormal state diagnosis is carried out, and an alarm is sent out in real time.
Specifically, the diagnosis of the abnormal state of pneumatic ash conveying comprises the diagnosis of conveying overtime, the diagnosis of pressurizing leakage, the diagnosis of system pressure overpressure and the diagnosis of abnormal jamming of a valve.
As shown in fig. 1, the specific method of delivery timeout diagnosis is as follows: installing a pressure transmitter at each conveying main pipe of the ash conveying system, measuring the pressure of the conveying main pipe in real time, and transmitting the pressure to a DCS (distributed control system) for recording; setting a conveying maximum set time TS1 of the ash conveying system and a net set pressure value PK1 of the air pipe; when the conveying time exceeds the maximum set time TS1, and the pressure value detected by the pressure transmitter is greater than PK1, the pipe blockage in the current conveying main pipe is judged, the pipe blockage alarm is triggered, an operator is prompted to strengthen a monitoring disc, and the pipe blockage reason is analyzed.
As shown in fig. 2, the specific method of the pressurized leak diagnosis is as follows: a pressure transmitter is arranged in front of a discharge valve of a conveying bin pump unit group and used for measuring the sealing property of a conveying unit in a stamping fluidization stage; setting the maximum set time TS2 for fluidizing and pressurizing compressed air and the lowest set pressure value PK2 of the ash conveying bin pump set; when the fluidization pressurization time exceeds the maximum set time TS2 and the pressure value of the ash conveying bin pump set detected by the pressure transmitter is smaller than PK2, judging that the current system valve has an internal leakage phenomenon, triggering the ash conveying bin pump set to perform stamping leakage alarm, and prompting an operator to perform system airtightness inspection.
As shown in fig. 3, the specific method of system pressure overpressure diagnosis is as follows: setting a highest set pressure value PK3 of the ash conveying bin pump set; when the pressure value of the ash conveying bin pump group detected by the pressure transmitter is greater than PK3, judging the overpressure fault of the current system, triggering overpressure alarm, and prompting operating personnel to investigate the overpressure reason of the bin pump group.
As shown in fig. 4, the specific method for diagnosing the abnormal valve jamming includes: a position feedback detection switch is arranged on a pneumatic control valve of each ash conveying bin pump group, a position feedback signal is transmitted to a DCS control system, and feedback detection time TS3 is set; the pneumatic control valve comprises an air inlet valve, a discharge valve, a feed valve and a balance valve; when the DCS control system receives the position feedback signal within the feedback detection time TS3, the valve jam fault alarm is triggered, and the operator is prompted to check the fault valve.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the technical solutions, and those skilled in the art should understand that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all the modifications and equivalent substitutions should be covered by the claims of the present invention.
Claims (6)
1. A pneumatic ash conveying abnormal state diagnosis and fault early warning method is characterized in that: the method is based on an ash conveying DCS control system monitoring platform, establishes an ash conveying abnormity self-diagnosis early warning model, diagnoses the pneumatic ash conveying abnormity state, and sends out an alarm in real time.
2. The pneumatic ash conveying abnormal state diagnosis and fault early warning method according to claim 1, characterized in that: the diagnosis of the abnormal state of the pneumatic ash conveying comprises the diagnosis of conveying overtime, the diagnosis of pressurizing leakage, the diagnosis of system pressure overpressure and the diagnosis of abnormal jamming of a valve.
3. The pneumatic ash conveying abnormal state diagnosis and fault early warning method according to claim 2, characterized in that: the specific method for the delivery timeout diagnosis is as follows:
installing a pressure transmitter at each conveying main pipe of the ash conveying system, measuring the pressure of the conveying main pipe in real time, and transmitting the pressure to a DCS (distributed control system) for recording;
setting a conveying maximum set time TS1 of the ash conveying system and a net set pressure value PK1 of the air pipe;
when the conveying time exceeds the maximum set time TS1 and the pressure value detected by the pressure transmitter is greater than PK1, the pipe blockage in the current conveying main pipe is judged, and the pipe blockage alarm is triggered.
4. The pneumatic ash conveying abnormal state diagnosis and fault early warning method according to claim 3, wherein the method comprises the following steps: the specific method for diagnosing the pressure leakage comprises the following steps:
a pressure transmitter is arranged in front of a discharge valve of a conveying bin pump unit group and used for measuring the sealing property of a conveying unit in a stamping fluidization stage;
setting the maximum set time TS2 for fluidizing and pressurizing compressed air and the lowest set pressure value PK2 of the ash conveying bin pump set;
when the fluidization pressurization time exceeds the maximum set time TS2 and the pressure value of the ash conveying bin pump set detected by the pressure transmitter is smaller than PK2, judging that the current system valve has an internal leakage phenomenon, and triggering the ash conveying bin pump set to perform stamping leakage alarm.
5. The pneumatic ash conveying abnormal state diagnosis and fault early warning method according to claim 4, wherein the method comprises the following steps: the specific method for diagnosing the pressure overpressure of the system comprises the following steps:
setting a highest set pressure value PK3 of the ash conveying bin pump set;
when the pressure value of the ash conveying bin pump group detected by the pressure transmitter is larger than PK3, judging that the current system has an overpressure fault, and triggering overpressure alarm.
6. The pneumatic ash conveying abnormal state diagnosis and fault early warning method according to claim 5, wherein the method comprises the following steps: the specific method for diagnosing the abnormal jamming of the valve comprises the following steps:
a position feedback detection switch is arranged on a pneumatic control valve of each ash conveying bin pump group, a position feedback signal is transmitted to a DCS control system, and feedback detection time TS3 is set;
when the DCS control system receives the position feedback signal within the feedback detection time TS3, the valve jam fault alarm is triggered.
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| CN202011630349.5A CN112799362A (en) | 2020-12-31 | 2020-12-31 | Pneumatic ash conveying abnormal state diagnosis and fault early warning method |
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| CN202011630349.5A CN112799362A (en) | 2020-12-31 | 2020-12-31 | Pneumatic ash conveying abnormal state diagnosis and fault early warning method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114751198A (en) * | 2022-04-22 | 2022-07-15 | 山东钢铁集团永锋临港有限公司 | Automatic cleaning and blowing method for pneumatic conveying of blocked pipe |
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2020
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| CN203372829U (en) * | 2013-07-18 | 2014-01-01 | 上海博士高环保设备工程有限公司 | Fly ash pneumatic auxiliary feeding combined device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114751198A (en) * | 2022-04-22 | 2022-07-15 | 山东钢铁集团永锋临港有限公司 | Automatic cleaning and blowing method for pneumatic conveying of blocked pipe |
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Application publication date: 20210514 |