CN110425566B - Air preheater monitoring and early warning system and working method thereof - Google Patents
Air preheater monitoring and early warning system and working method thereof Download PDFInfo
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- CN110425566B CN110425566B CN201910630163.0A CN201910630163A CN110425566B CN 110425566 B CN110425566 B CN 110425566B CN 201910630163 A CN201910630163 A CN 201910630163A CN 110425566 B CN110425566 B CN 110425566B
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- module
- concentration
- comparison module
- air preheater
- analyzer
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000007405 data analysis Methods 0.000 claims abstract description 26
- 238000013500 data storage Methods 0.000 claims abstract description 26
- 230000002159 abnormal effect Effects 0.000 claims abstract description 24
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 52
- 229910021529 ammonia Inorganic materials 0.000 claims description 28
- 239000003546 flue gas Substances 0.000 claims description 28
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 26
- 238000001514 detection method Methods 0.000 claims description 18
- 239000000779 smoke Substances 0.000 claims description 17
- 238000007664 blowing Methods 0.000 claims description 14
- 239000004071 soot Substances 0.000 claims description 14
- 238000005507 spraying Methods 0.000 claims description 13
- 238000004458 analytical method Methods 0.000 claims description 12
- 230000005856 abnormality Effects 0.000 claims description 3
- 230000010485 coping Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 4
- 230000002411 adverse Effects 0.000 abstract description 2
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/006—Layout of treatment plant
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L15/00—Heating of air supplied for combustion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
-
- 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
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Treating Waste Gases (AREA)
- Air Supply (AREA)
Abstract
The invention discloses a monitoring and early warning system of an air preheater and a working method thereof, and the monitoring and early warning system comprises a sensing module, a data storage and analysis module, a monitoring module, a control system and an execution module, wherein the sensing module is electrically connected with the data storage and analysis module through a signal wire, the data storage and analysis module is electrically connected with the monitoring module through the signal wire, the monitoring module is electrically connected with the control system through the signal wire, and the control system is respectively electrically connected with the execution module and an alarm device through the signal wire. The invention can solve and alarm in time when the air preheater working environment is abnormal, so that the staff can know the situation in time, thereby taking precautionary measures, greatly improving the safety of the air preheater working environment, ensuring the normal operation of the air preheater and the machine set, avoiding the occurrence of adverse effects.
Description
Technical Field
The invention relates to an air preheater monitoring and early warning system and a working method thereof.
Background
The invention provides an air preheater monitoring and early warning system, which is characterized in that the air preheater is equipment which is required to be used in a boiler flue of a power plant, when the air preheater works, the environment in the flue is severe, the condition is complex, various anomalies are often generated in the air preheater, so that the normal operation of the whole flue system is influenced, the working environment and the working condition of the air preheater are required to be known at any time, so that the normal operation of the whole flue system is ensured, the existing air preheater is not provided with a monitoring system when the air preheater works, the working condition and the working environment of the air preheater cannot be known at any time, the problems are often found when the air preheater is out, and then the problems are solved, so that the normal operation of the whole unit is greatly influenced.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides an air preheater monitoring and early warning system, which solves the problems that the working condition and working environment of the air preheater cannot be mastered at any time without a monitoring system when the existing air preheater works, and the air preheater is usually found when a problem occurs and then solved, so that the normal operation of the whole flue system is greatly influenced.
The invention solves the problems by adopting the following technical scheme: the utility model provides an air preheater control early warning system, includes sensing module, data storage and analysis module, monitoring module, control system and execution module, its characterized in that: the sensing module is electrically connected with the data storage and analysis module through a signal wire, the data storage and analysis module is electrically connected with the monitoring module through a signal wire, the monitoring module is electrically connected with the control system through a signal wire, and the control system is respectively electrically connected with the execution module and the alarm device through signal wires.
Further, the sensing module comprises a thermocouple, a differential pressure transmitter, a flue gas analyzer, an NH 3 concentration analyzer and an SO 3 concentration analyzer.
Further, the monitoring module comprises a cold end comprehensive temperature comparison module, a flue gas side pressure difference comparison module, an ammonia concentration comparison module and an SO 3 concentration comparison module.
Further, the control system is a PLC control system.
Further, the execution module comprises a heater, a soot blowing system, an ammonia spraying system and an SO 3 removing system.
The working method of the air preheater monitoring and early warning system comprises the following steps of respectively installing a plurality of thermocouples at temperature measuring points of a cold end, a hot end and an intermediate layer of the smoke side of the air preheater, respectively installing thermocouples at a primary air inlet and a secondary air inlet of the air preheater, installing a differential pressure transmitter at a smoke side outlet of the air preheater, arranging detecting points of a smoke analyzer, an NH 3 concentration analyzer and an SO 3 concentration analyzer at an inlet of the air preheater, the temperature measured by a plurality of thermocouples, the pressure difference of the smoke side measured by a pressure difference transmitter, the analysis of smoke components by a smoke analyzer, The analysis result of NH 3 concentration analyzer to NH 3 concentration and the analysis result of SO 3 concentration analyzer to SO 3 concentration are respectively transmitted into a data storage and analysis module for storage and analysis, The data storage and analysis module transmits the data measured by the thermocouple, the differential pressure transmitter, the NH 3 concentration analyzer and the SO 3 concentration analyzer to the monitoring module, the cold end comprehensive temperature comparison module, the flue gas side pressure difference comparison module, the ammonia concentration comparison module and the SO 3 concentration comparison module in the monitoring module compare the detection data transmitted by the data storage and analysis module, the cold end comprehensive temperature comparison module, the flue gas side pressure difference comparison module, the ammonia concentration comparison module and the SO 3 concentration comparison module are respectively provided with set values, if various data transmitted by the data storage and analysis module exceeds the set value ranges of the cold end comprehensive temperature comparison module, the flue gas side pressure difference comparison module, the ammonia concentration comparison module and the SO 3 concentration comparison module, The monitoring module transmits the signal to the control system, the control system controls the air heater, the soot blowing system, the ammonia spraying system and the SO 3 removing system in the execution module to work, the air heater corresponds to the detection points of a plurality of thermocouples respectively, the soot blowing system corresponds to the detection point of a differential pressure transmitter, the ammonia spraying system corresponds to the detection point of an NH 3 concentration analyzer, the SO 3 removing system corresponds to the detection point of an SO 3 concentration analyzer, When the temperature of the detection point of the thermocouple is abnormal, the air heater works to solve the problem of temperature abnormality, when the pressure difference data at the smoke side inlet and the smoke side outlet of the air preheater is abnormal, the soot blowing system works to solve the problem of pressure difference at the smoke side inlet and the smoke side outlet of the air preheater, when the concentration of NH 3 and the concentration of SO 3 are abnormal, the ammonia spraying system and the SO 3 removing system work, The problem that the NH 3 concentration and SO 3 concentration data are abnormal is solved, the control system also controls the alarm device to alarm, workers can know that abnormal conditions occur at the first time, the method is convenient to be ready for coping at the first time, meanwhile, whether the problem of abnormal data is successfully solved by the execution module or not can be observed, and the safety and reliability of equipment operation are greatly improved.
Compared with the prior art, the invention has the following advantages and effects: the air preheater monitoring and early warning system is characterized in that a sensing module is arranged in the working environment of the air preheater, various parameters in the working environment of the air preheater can be detected, data are stored, a monitoring module, a control system and an execution module are further arranged, abnormal conditions in the working environment of the air preheater can be timely processed through the execution module, the abnormal conditions are timely solved, major accidents are avoided, and meanwhile, an alarm device is further arranged, when the air preheater is abnormal, the alarm device can timely alarm, so that workers can timely know the conditions, precautionary measures are taken, the safety of the working environment of the air preheater is greatly improved, the working of the whole flue system is ensured to be normal, adverse effects are avoided.
Drawings
Fig. 1 is a schematic structural view of an embodiment of the present invention.
In the figure: the system comprises a 1-sensing module, a 101-thermocouple, a 102-differential pressure transmitter, a 103-flue gas analyzer, a 104-NH 3 concentration analyzer, a 105-SO 3 concentration analyzer, a 2-data storage and analysis module, a 3-monitoring module, a 301-cold end comprehensive temperature comparison module, a 302-flue gas side differential pressure comparison module, a 303-ammonia concentration comparison module, a 304-SO 3 concentration comparison module, a 4-control system, a 5-execution module, a 501-warm air blower, a 502-soot blowing system, a 503-ammonia injection system, a 504-SO 3 removal system and a 6-alarm device.
Detailed Description
The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and not limited to the following examples.
Referring to fig. 1, it can be seen that: the air preheater monitoring and early warning system in the embodiment comprises a sensing module 1, a data storage and analysis module 2, a monitoring module 3, a control system 4 and an execution module 5, wherein the sensing module 1 is electrically connected with the data storage and analysis module 2 through a signal wire, the data storage and analysis module 2 can store and analyze data detected by the sensing module 1, the data storage and analysis module 2 is electrically connected with the monitoring module 3 through the signal wire, the monitoring module 3 is electrically connected with the control system 4 through the signal wire, the control system 4 is respectively electrically connected with the execution module 5 and an alarm device 6 through the signal wire, and the alarm device 6 can alarm when various parameter data are abnormal in the working environment of the air preheater, so that a worker can quickly know the situation.
The sensing module 1 comprises a thermocouple 101, a differential pressure transmitter 102, a flue gas analyzer 103, an NH 3 concentration analyzer 104 and an SO 3 concentration analyzer 105, wherein the thermocouple 101, the differential pressure transmitter 102, the flue gas analyzer 103, the NH 3 concentration analyzer 104 and the SO 3 concentration analyzer 105 can detect various parameters in the working environment of the air conditioner; the monitoring module 3 comprises a cold end comprehensive temperature comparison module 301, a flue gas side pressure difference comparison module 302, an ammonia concentration comparison module 303 and an SO 3 concentration comparison module 304, wherein the cold end comprehensive temperature comparison module 301, the flue gas side pressure difference comparison module 302, the ammonia concentration comparison module 303 and the SO 3 concentration comparison module 304 are respectively provided with data range values of related parameters, and the data range values are used for comparing data detected by corresponding equipment in the monitoring module 3; the control system 4 is a PLC control system, and the PLC control system is a PLC programmable controller in the prior art and can control the execution module 5 to work; the execution module 5 comprises a heater 501, a soot blowing system 502, an ammonia spraying system 503 and an SO 3 removing system 504, wherein the heater 501, the soot blowing system 502, the ammonia spraying system 503 and the SO 3 removing system 504 are mature technologies in the existing flue system, and can be matched with instructions of the control system 4 to solve various abnormal data in the working environment of the air preheater.
The working principle and the advantages of the invention are that: a plurality of thermocouples 101 are respectively arranged at temperature measuring points of a cold end, a hot end and an intermediate layer of the flue gas side of the air preheater, the thermocouples 101 are respectively arranged at a primary air inlet and a secondary air inlet of the air preheater, a differential pressure transmitter 102 is arranged at a flue gas side inlet of the air preheater, the detecting points of a flue gas analyzer 103, a NH 3 concentration analyzer 104 and a SO 3 concentration analyzer 105 are arranged at the inlet of the air preheater, the temperature measured by the thermocouples 101, the pressure difference on the flue gas side measured by the pressure difference transmitter 102, the analysis of the flue gas components by the flue gas analyzer 103, The analysis result of the NH 3 concentration analyzer 104 on the NH 3 concentration and the analysis result of the SO 3 concentration analyzer 105 on the SO 3 concentration are respectively transmitted into the data storage and analysis module 2 for storage and analysis, The data storage and analysis module 2 transmits the data measured by the thermocouple 101, the differential pressure transmitter 102, the NH 3 concentration analyzer 104 and the SO 3 concentration analyzer 105 to the monitoring module 3, the cold end comprehensive temperature comparison module 301, the flue gas side pressure difference comparison module 302, the ammonia concentration comparison module 303 and the SO 3 concentration comparison module 304 in the monitoring module 3 compare the detection data transmitted by the data storage and analysis module 2, The cold end comprehensive temperature comparison module 301, the flue gas side pressure difference comparison module 302, the ammonia concentration comparison module 303 and the SO 3 concentration comparison module 304 are respectively provided with set values, if various data transmitted by the data storage and analysis module 2 exceeds the numerical ranges set by the cold end comprehensive temperature comparison module 301, the flue gas side pressure difference comparison module 302, the ammonia concentration comparison module 303 and the SO 3 concentration comparison module 304, The monitoring module 3 transmits the signal to the control system 4, the control system 4 controls the heater 501, the soot blowing system 502, the ammonia spraying system 503 and the SO 3 removing system 504 in the execution module 5 to work, the heater 501 corresponds to the detection points of the plurality of thermocouples 101 respectively, the soot blowing system 502 corresponds to the detection point of the differential pressure transmitter 102, the ammonia spraying system 503 corresponds to the detection point of the NH 3 concentration analyzer 104, The SO 3 removing system 504 corresponds to the detection point of the SO 3 concentration analyzer 105, when the temperature of the detection point of the thermocouple 101 is abnormal, the air heater 501 works to solve the problem of temperature abnormality, when the pressure difference data at the smoke side outlet of the air preheater is abnormal, the soot blowing system 502 works to solve the problem of pressure difference at the smoke side outlet of the air preheater, When the data of the NH 3 concentration and the SO 3 concentration are abnormal, the ammonia spraying system 503 and the SO 3 removing system 504 work to solve the problem of the abnormal data of the NH 3 concentration and the SO 3 concentration, meanwhile, the control system 4 also controls the alarm device 6 to alarm, so that a worker can know that an abnormal situation occurs at the first time, the worker is convenient to prepare a coping method at the first time, and meanwhile, whether the problem of abnormal data is successfully solved by the execution module 5 can be observed, so that the safety and reliability of equipment operation are greatly improved. the invention has scientific and reasonable structure, good use monitoring and early warning effect, safety and reliability and is suitable for popularization and use.
Although the present invention has been described with reference to the above embodiments, it should be understood that the present invention is not limited to the above embodiments, and modifications can be made by those skilled in the art without departing from the spirit and scope of the invention.
Claims (1)
1. The working method of the air preheater monitoring and early warning system comprises a sensing module (1), a data storage and analysis module (2), a monitoring module (3), a control system (4) and an execution module (5), and is characterized in that: the sensing module (1) is electrically connected with the data storage and analysis module (2) through a signal wire, the data storage and analysis module (2) is electrically connected with the monitoring module (3) through the signal wire, the monitoring module (3) is electrically connected with the control system (4) through the signal wire, and the control system (4) is respectively electrically connected with the execution module (5) and the alarm device (6) through the signal wire; the sensing module (1) comprises a thermocouple (101), a differential pressure transmitter (102), a flue gas analyzer (103), an NH 3 concentration analyzer (104) and an SO 3 concentration analyzer (105); the monitoring module (3) comprises a cold end comprehensive temperature comparison module (301), a flue gas side pressure difference comparison module (302), an ammonia concentration comparison module (303) and an SO 3 concentration comparison module (304); the execution module (5) comprises a warm air blower (501), a soot blowing system (502), an ammonia spraying system (503) and an SO 3 removing system (504); the control system (4) is a PLC control system;
A plurality of thermocouples (101) are respectively arranged at temperature measuring points of a smoke side cold end, a hot end and an intermediate layer of the air preheater, the thermocouples (101) are respectively arranged at a primary air inlet and a secondary air inlet of the air preheater, a differential pressure transmitter (102) is arranged at a smoke side outlet of the air preheater, detecting points of a smoke analyzer (103), a NH 3 concentration analyzer (104) and a SO 3 concentration analyzer (105) are arranged at the inlet of the air preheater, Temperature measured by a plurality of thermocouples (101), pressure difference on the flue gas side measured by a pressure difference transmitter (102), analysis of flue gas components by a flue gas analyzer (103), The analysis result of NH 3 concentration analyzer (104) to NH 3 concentration and the analysis result of SO 3 concentration analyzer (105) to SO 3 concentration are respectively transmitted into a data storage and analysis module (2) for storage and analysis, the data storage and analysis module (2) transmits the data measured by the thermocouple (101), the differential pressure transmitter (102), the NH 3 concentration analyzer (105) and the SO 3 concentration analyzer (105) into the monitoring module (3), and the cold end comprehensive temperature comparison module (301), the flue gas side differential pressure comparison module (302) in the monitoring module (3), The ammonia concentration comparison module (303) and the SO 3 concentration comparison module (304) compare the detection data transmitted by the data storage and analysis module (2), and set values are arranged in the cold end comprehensive temperature comparison module (301), the flue gas side pressure difference comparison module (302), the ammonia concentration comparison module (303) and the SO 3 concentration comparison module (304), If various data transmitted by the data storage and analysis module (2) exceeds the numerical ranges set by the cold end comprehensive temperature comparison module (301), the flue gas side pressure difference comparison module (302), the ammonia concentration comparison module (303) and the SO 3 concentration comparison module (304), the monitoring module (3) transmits the signal to the control system (4), the control system (4) controls the air heater (501), the soot blowing system (502), the ammonia spraying system (503) and the SO 3 removing system (504) in the execution module (5) to work, The warm air device (501) is respectively corresponding to the detection points of a plurality of thermocouples (101), the soot blowing system (502) is corresponding to the detection point of a differential pressure transmitter (102), the ammonia spraying system (503) is corresponding to the detection point of a NH 3 concentration analyzer (104), the SO 3 removing system (504) is corresponding to the detection point of a SO 3 concentration analyzer (105), When the temperature of the detection point of the thermocouple (101) is abnormal, the air heater (501) works to solve the problem of temperature abnormality, when the pressure difference data at the smoke side outlet of the air preheater is abnormal, the soot blowing system (502) works to solve the problem of pressure difference at the smoke side outlet of the air preheater, when the concentration of NH 3 and the concentration data of SO 3 are abnormal, The ammonia spraying system (503) and the SO 3 removing system (504) work to solve the problem of abnormal data of the concentration of NH 3 and the concentration of SO 3, and the control system (4) also controls the alarm device (6) to alarm SO that the staff can know that abnormal conditions occur at the first time, The method is convenient for preparing the coping method at the first time, and meanwhile, whether the problem of abnormal data is successfully solved by the execution module (5) can be observed.
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| CN201910630163.0A CN110425566B (en) | 2019-07-12 | 2019-07-12 | Air preheater monitoring and early warning system and working method thereof |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206929799U (en) * | 2017-05-22 | 2018-01-26 | 甘肃蓝科石化高新装备股份有限公司 | It is a kind of to prevent air preheater from the device of acid dew piont corrosion occur |
| CN210772277U (en) * | 2019-07-12 | 2020-06-16 | 华电电力科学研究院有限公司 | Air preheater monitoring and early warning system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102278767B (en) * | 2010-06-12 | 2013-09-11 | 上海市东方海事工程技术有限公司 | Air leakage control system and control method for air pre-heater |
| CN103914063A (en) * | 2014-03-31 | 2014-07-09 | 华电国际电力股份有限公司技术服务中心 | On-line performance diagnostic system and method for rotary air pre-heater |
| CN109632277A (en) * | 2018-12-17 | 2019-04-16 | 华电电力科学研究院有限公司 | A kind of rotary regenerative air heater heat exchange element performance test system and method |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206929799U (en) * | 2017-05-22 | 2018-01-26 | 甘肃蓝科石化高新装备股份有限公司 | It is a kind of to prevent air preheater from the device of acid dew piont corrosion occur |
| CN210772277U (en) * | 2019-07-12 | 2020-06-16 | 华电电力科学研究院有限公司 | Air preheater monitoring and early warning system |
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