CN113686507A - System and method for monitoring leakage of thermal generator set - Google Patents
System and method for monitoring leakage of thermal generator set Download PDFInfo
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- CN113686507A CN113686507A CN202111014454.0A CN202111014454A CN113686507A CN 113686507 A CN113686507 A CN 113686507A CN 202111014454 A CN202111014454 A CN 202111014454A CN 113686507 A CN113686507 A CN 113686507A
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- flue
- monitoring
- generator set
- flue gas
- vertical flue
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 19
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000003546 flue gas Substances 0.000 claims abstract description 30
- 239000000428 dust Substances 0.000 claims abstract description 13
- 238000005070 sampling Methods 0.000 claims abstract description 8
- 238000012545 processing Methods 0.000 claims description 26
- 238000005259 measurement Methods 0.000 claims description 6
- 230000000630 rising effect Effects 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 3
- 238000007405 data analysis Methods 0.000 claims description 3
- 239000000779 smoke Substances 0.000 claims description 3
- 238000010248 power generation Methods 0.000 description 11
- 238000006477 desulfuration reaction Methods 0.000 description 7
- 230000023556 desulfurization Effects 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000007613 environmental effect Effects 0.000 description 4
- 239000003245 coal Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
Abstract
The application discloses a method for monitoring leakage of a thermal generator set, which comprises the following steps of S1, collecting flue gas humidity information at a position which is behind a bag-type dust collector and is located at the front vertical flue elevation of an induced draft fan by 25-27 meters; the application also discloses a system for monitoring leakage of the thermal generator set, which comprises a vertical flue, wherein the vertical flue is positioned between a bag-type dust collector of the generator set and an induced draft fan, and a sampling hole is formed in the position 25-27 meters away from the elevation of the vertical flue. The alarm is carried out by increasing the change amplitude and the change rate of the flue gas humidity at the measuring point of the flue, when the water-cooled wall, the superheater, the economizer and the like of the boiler leak, the flue gas can change rapidly, and operators can judge whether the boiler leaks or not through the change of the measuring point of the boiler frame humidity and the popup window alarm, so that the adjustment is carried out as soon as possible, the accident is avoided being further enlarged, the system safety is improved, the safe operation of a unit is further ensured, and the investment cost is low.
Description
Technical Field
The invention relates to the technical field of thermal power generation, in particular to a system and a method for monitoring leakage of a thermal generator set.
Background
A method of generating electricity using energy contained in combustible materials and the like is collectively called thermal power generation; according to the power generation mode, thermal power generation is divided into coal-fired steam turbine power generation, oil-fired steam turbine power generation, gas-steam combined cycle power generation and internal combustion engine power generation; thermal power still occupies most markets of electric power, so that thermal power technology is continuously improved and developed, and thermal power generation is an essential facility for development of high-energy-consumption industries.
In the unit equipment of thermal power generation, the operation of the system is mature, but factors influencing stable operation and high-efficiency operation still exist in the operation, wherein, the water in the generator set is a key factor influencing the operation, as water is needed in many links of the thermal power generation, therefore, once the ring joint leaks, the calorific value of the coal is influenced, the generating efficiency is reduced, the energy waste is caused, the surrounding facilities are easy to be corroded, the service life is influenced, therefore, in each link of the unit operation, a plurality of devices are required to be installed for monitoring, which not only greatly increases the unit cost, but also cannot realize comprehensive monitoring, and still has monitoring blind spots, therefore, personnel are required to check the operation of each instrument all day long, and the labor cost of the unit is increased.
Disclosure of Invention
The application provides a system and a method for monitoring leakage of a thermal generator set, and solves the problem that the traditional thermal generator set is difficult to monitor and find the leakage of the thermal generator set during operation.
The application provides a method for monitoring leakage of a thermal generator set, which comprises the following steps:
s1, collecting flue gas humidity information at the position of a vertical flue elevation 25-27 meters behind the bag-type dust collector and in front of the induced draft fan;
s2, transmitting the flue gas humidity information to a processing module for data analysis;
s3, the processing module judges whether the smoke humidity information has a value larger than 14% VOL or whether the rising rate is larger than 1VOL per minute;
s4, if yes, the output module flickers and alarms on the operation picture of the popup window; and if not, the operation picture of the output module normally displays the operation data.
The utility model provides a system for monitoring thermal generator set reveals, includes vertical flue, vertical flue is located between generating set's sack cleaner and the draught fan, elevation 25-27 meters department of vertical flue is equipped with the sampling trompil, be equipped with the flange pipe on the sampling trompil, the one end of flange pipe is connected with humidity measurement device, humidity measurement device's the input module that has through communication control cable connection, input module is connected with processing module, processing module is connected with output module.
Preferably, the flanged pipe is inclined upwards by 5-10 ° with respect to the vertical of the vertical flue.
Preferably, the moisture measuring device is a JANAPO moisture meter.
Preferably, the collection point for collecting the flue gas humidity information is located at the elevation 26.4 meters of the vertical flue.
Preferably, the processing module is a NEXUS DCS control system.
Preferably, the output module is a computer display screen.
Preferably, the temperature of the flue gas at the inlet of the bag-type dust collector is 65 to 67 ℃.
According to the technical scheme, the system and the method for monitoring the leakage of the thermal generator set are provided, in operation, the system monitors flue gas of the traditional thermal generator set, in order to ensure the operation reliability of the system, the desulfurization and dust removal process of the thermal generator set needs to meet the environmental protection requirement, the humidity measuring device measures the humidity of the flue gas at the elevation 25-27 meters of the vertical flue, the flue gas is transmitted to the processing module through the signal control cable at 4-20mA, the controller is judged according to the logic of the processing module, when the value is greater than 14% VOL or the rising rate is greater than 1VOL per minute, the popup window on an operation picture of the output module flickers to give an alarm, the system is normally monitored at other time, and the output module displays the alarm.
Compared with the prior art, the invention has the beneficial effects that:
the invention alarms by increasing the change amplitude and the change rate of the flue gas humidity at the measuring point of the flue, when the leakage occurs on a boiler water-cooled wall, a superheater, a coal economizer and the like, the flue gas can change rapidly, and operators judge whether the boiler has the leakage or not through the change of the measuring point of the boiler frame humidity and the popup window alarm, so that the adjustment is made as soon as possible, the accident is avoided being further enlarged, the system safety is improved, meanwhile, the waste of water resources and energy sources can be reduced, the system is stable and reliable in operation, the safe operation of a unit is further ensured, and the investment cost is low.
Drawings
In order to more clearly illustrate the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without any creative effort.
Fig. 1 is a schematic view of an installation structure of a system for monitoring leakage of a thermal generator set according to the present invention;
fig. 2 is a schematic control structure diagram of a system for monitoring leakage of a thermal generator set according to the present invention;
fig. 3 is a schematic processing structure diagram of a method for monitoring leakage of a thermal generator set according to the present invention.
In the figure: the device comprises a vertical flue 1, a sampling hole 2, a flange pipe 3, a humidity measuring device 4, an input module 5, a processing module 6 and an output module 7.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.
Referring to fig. 1-3, a method for monitoring a thermal generator set leakage includes the following steps:
s1, in order to ensure the reliability of system operation, after the system is installed, the dust removal of the generator set must meet the environmental protection requirement, the desulfurization reaches the control requirement of ultra-low emission desulfurization parameters, after the desulfurization of the desorption tower, the temperature of the flue gas entering the inlet of the bag-type dust remover is 65 to 67 ℃, and the above requirements are all the specified requirements of desulfurization and dust removal, therefore, the system does not need to modify the original dust removal process, the application of the method has less influence on each link of the thermal generator set, and is convenient to implement and apply, the flue gas humidity information of 1 elevation 25 to 27 meters of the vertical flue in front of the induced draft fan machine is collected, the collection point of the flue gas humidity information is optimally located at the elevation 26.4 meters of the vertical flue 1, the flow of the flue gas is stable, the data of each parameter in the flue gas is stable, therefore, the measured value is accurate, and the monitoring is reliable;
s2, transmitting the flue gas humidity information to a processing module 6 for data analysis, wherein the processing module 6 is a NEXUS DCS control system, an Essen JANAPO hygrograph is used for measuring the humidity, the measuring principle is a resistance-capacitance sensing technology, and the measuring range is 0-40% VOL; the humidity measuring instrument is of a four-wire system, is powered by 220VAC, is transmitted to the AI card input end of the GE Xinhua NEXUS DCS control system through a signal control cable in a 4-20mA mode, is a passive contact, has long service life and accurate measurement, can feed measured data back to the processing module 6 for processing in time and quickly, and the processing module 6 is a common control system of a factory, so that the integration with the existing system of the factory can be realized, information can be fed back to each department in time, and the input cost is low;
s3, the processing module 6 judges the flue gas humidity information, whether the value is greater than 14% VOL or whether the rising rate is greater than 1VOL per minute, when the unit normally operates and is put outside the furnace for desulfurization, the humidity measured value is about 10 VOL%, after the boiler leaks, the measuring point is in a rapid rising trend along with the increase of leakage, the amplitude and the change rate of the measuring point are obviously changed, in multiple leakage events after the scheme is implemented, the humidity measuring point is obviously raised as shown in the following table 1, the timeliness and the accuracy of the reaction of the measuring point are superior to the changes of the boiler feed water flow, the tail flue related smoke temperature and the pressure measuring point, and the alarm is timely;
table 1: related parameter change table for leakage
S4, if yes, the output module 7 operates the picture popup to flash and alarm; if the operation data is displayed normally by the operation picture of the output module 7, the output module 7 is a computer display screen, the change amplitude and the change rate of the measuring point are increased for alarming, when leakage occurs on a water wall, a superheater, a coal economizer and the like of the boiler, operators judge whether the leakage occurs in the boiler through the change of the humidity measuring point of the boiler picture and popup window alarming, so that adjustment is made as soon as possible, further expansion of accidents is avoided, safe operation of the unit is ensured, the DCS light character plate flickers when the humidity measuring point value reaches 14 VOL% or the speed value of the humidity measuring point per minute rises by 1 VOL%, the operators are reminded to strengthen monitoring, check and make adjustment in time, and when the parameters are normal, the output module 7 displays normally.
A system for monitoring the leakage of a thermal power generating set comprises a vertical flue 1, wherein flue gas can stably move, resistance is small, the vertical flue 1 is positioned between a bag-type dust collector and an induced draft fan of the generating set, after the flue gas is pre-processed, interference factors are few, measurement is more accurate, a sampling opening 2 is arranged at the elevation of 25-27 meters of the vertical flue 1, a measuring point meets the requirement of environmental protection, the airflow of the flue gas is stable, a flange pipe 3 is arranged on the sampling opening 2, the installation is convenient, the sealing performance is good, the flange pipe 3 is upwards inclined by 5-10 degrees relative to the vertical line of the vertical flue 1, a measuring point is inclined by a certain angle and is better contacted with the flue gas, one end of the flange pipe 3 is connected with a humidity measuring device 4, the humidity measuring device 4 extends into the vertical flue 1 for monitoring, a Nanjing Eisen JAO humidity meter is used in the system, the measuring principle is a capacitance-resistance type sensing technology, the range is 0-40% VOL, humidity measuring device 4 is connected with input module 5 through communication control cable, input module 5 is the AI fastener, for passive contact, input module 5 is connected with processing module 6, processing module 6 is GE Xinhua NEXUS DCS control system, input module 5 inserts and carries out logical operation in the processing module, compare with the default, processing module 6 is connected with output module 7, show the real-time data of monitoring through output module 7, when reaching the warning default, pop out the bullet window and report to the police, timely feedback is to monitoring personnel, timely adjustment of making, avoid the accident to enlarge.
According to the technical scheme, during use, the system monitors the flue gas of the traditional thermal generator set, the reliability of system operation is guaranteed, the desulfurization and dust removal processes of the thermal generator set need to meet the environmental protection requirement, the humidity of the flue gas is measured at the elevation 25-37 meters of the vertical flue 1 by the humidity measuring device 4, the flue gas is transmitted to the processing module by 4-20mA through the signal control cable, the controller is judged according to the logic of the processing module, when the value is greater than 14% VOL or the rising rate is greater than 1VOL per minute, the output module operates the picture popup window to flash and alarm, other time systems normally monitor, and the output module normally displays.
Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope of the disclosure being indicated by the following claims.
It will be understood that the present application is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The above-described embodiments of the present application do not limit the scope of the present application.
Claims (8)
1. A method for monitoring leakage of a thermal generator set comprises the following steps:
s1, collecting flue gas humidity information at the position of 25-27 meters of elevation of a vertical flue (1) in front of a draught fan behind a bag-type dust collector;
s2, transmitting the flue gas humidity information to a processing module (6) for data analysis;
s3, the processing module (6) judges whether the smoke humidity information has a value larger than 14% VOL or whether the rising rate is larger than 1VOL per minute;
s4, if yes, the output module (7) operates the pop-up window on the picture to flash and alarm; if not, the operation picture of the output module (7) normally displays the operation data.
2. The utility model provides a system for monitoring thermal generator set reveals, includes vertical flue (1), its characterized in that: vertical flue (1) is located between generating set's sack cleaner and the draught fan, the elevation 25-27 meters department of vertical flue (1) is equipped with sampling trompil (2), be equipped with flange pipe (3) on sampling trompil (2), the one end of flange pipe (3) is connected with humidity measurement device (4), there is input module (5) humidity measurement device (4) through communication control cable connection, input module (5) are connected with processing module (6), processing module (6) are connected with output module (7).
3. A system for monitoring a thermal power generating unit leakage according to claim 2, characterized in that the flange pipe (3) is inclined 5-10 ° upwards in relation to the vertical of the vertical flue (1).
4. A system for monitoring a thermal power generating unit leak according to claim 2, characterized in that the humidity measuring device (4) is a JANAPO hygrometer.
5. A method for monitoring a thermal power generating unit leakage according to claim 1, characterized in that the collection point for collecting the flue gas humidity information is located at the elevation 26.4 meters of the vertical flue (1).
6. A method of monitoring a thermal power generating unit leakage according to claim 1, characterized in that the processing module (6) is a NEXUSDCS control system.
7. A method for monitoring a thermal generator set leakage according to claim 1, characterized in that the output module (7) is a computer display screen.
8. The method of claim 1, wherein the temperature of the flue gas at the inlet of the bag-type dust collector is 65 to 67 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111014454.0A CN113686507A (en) | 2021-08-31 | 2021-08-31 | System and method for monitoring leakage of thermal generator set |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111014454.0A CN113686507A (en) | 2021-08-31 | 2021-08-31 | System and method for monitoring leakage of thermal generator set |
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| CN113686507A true CN113686507A (en) | 2021-11-23 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203259380U (en) * | 2013-05-20 | 2013-10-30 | 铜陵蓝光电子科技有限公司 | Smoke sampling device capable of preventing pipeline blockage |
| CN104697911A (en) * | 2015-03-11 | 2015-06-10 | 贾金柱 | Device and method for continuous online measurement of concentration of wet flue gas particles in coal-fired power plant |
| CN107036070A (en) * | 2017-05-22 | 2017-08-11 | 深圳钰湖电力有限公司 | A kind of boiler leakage detects warning device |
| CN206618604U (en) * | 2017-03-24 | 2017-11-07 | 中兴仪器（深圳）有限公司 | A kind of high heating element of dilution sampling device |
| CN108645571A (en) * | 2018-05-17 | 2018-10-12 | 高振宇 | The device and method of coal-powder boiler or circulating fluidized bed boiler tiny leakage for identification |
| CN209745930U (en) * | 2019-04-04 | 2019-12-06 | 深圳市云顶自动化技术有限公司 | Flue gas hygrometer with drainage function |
-
2021
- 2021-08-31 CN CN202111014454.0A patent/CN113686507A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203259380U (en) * | 2013-05-20 | 2013-10-30 | 铜陵蓝光电子科技有限公司 | Smoke sampling device capable of preventing pipeline blockage |
| CN104697911A (en) * | 2015-03-11 | 2015-06-10 | 贾金柱 | Device and method for continuous online measurement of concentration of wet flue gas particles in coal-fired power plant |
| CN206618604U (en) * | 2017-03-24 | 2017-11-07 | 中兴仪器（深圳）有限公司 | A kind of high heating element of dilution sampling device |
| CN107036070A (en) * | 2017-05-22 | 2017-08-11 | 深圳钰湖电力有限公司 | A kind of boiler leakage detects warning device |
| CN108645571A (en) * | 2018-05-17 | 2018-10-12 | 高振宇 | The device and method of coal-powder boiler or circulating fluidized bed boiler tiny leakage for identification |
| CN209745930U (en) * | 2019-04-04 | 2019-12-06 | 深圳市云顶自动化技术有限公司 | Flue gas hygrometer with drainage function |
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