CN106441962A - Method for real-time monitoring of performance of fan of boiler in power station - Google Patents
Method for real-time monitoring of performance of fan of boiler in power station Download PDFInfo
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- CN106441962A CN106441962A CN201610782247.2A CN201610782247A CN106441962A CN 106441962 A CN106441962 A CN 106441962A CN 201610782247 A CN201610782247 A CN 201610782247A CN 106441962 A CN106441962 A CN 106441962A
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Classifications
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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
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/005—Testing of complete machines, e.g. washing-machines or mobile phones
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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
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/008—Subject matter not provided for in other groups of this subclass by doing functionality tests
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
Abstract
The invention provides a method for real-time monitoring of the performance of a fan of a boiler in a power station. The method is characterized in that the method includes following steps: step 1, an inlet air duct of the fan is provided with a fan inlet pressure measuring device, a thermocouple, and a fan inlet back-supported tube, an outlet air duct of the fan is provided with a fan outlet pressure measuring device, a computer acquires data acquired at the fan inlet pressure measuring device, the fan inlet back-supported tube, and the fan outlet pressure measuring device through a pressure transmitter group, and the computer acquires data acquired at the thermocouple through a data acquisition device; and step 2, operation parameters are obtained. According to the method, the defect that in the conventional measuring method, the performance of the fan is difficult to be measured and grasped in real time is overcome, the fan test data acquired in real time and the related DCS operation parameters are combined, the current practical operation efficiency and the operating point of the fan are obtained through calculation and can be displayed in a fan performance curve, and the reference is provided for operation personnel of a power supply plant for determination of the security and economy of the fan.
Description
Technical field
The present invention relates to a kind of method of Air Fans of Utility Boilers performance real-time monitoring.
Background technology
The primary air fan that coal-burning power plant is equipped with, pressure fan are important subsidiary engines, mainly have centrifugal, two kinds of axial-flow type.Logical
Often the unit more than 600MW grade typically adopts axial fan, is divided into stator blade or the movable vane can according to blade adjustments mode again
Mode.
Whether safe fan operation is is directly connected to boiler operatiopn safety.In recent years because fluctuating in coal market, power plant adopts
Purchase fuel is with the market price as Main Basiss mostly, less uses design coal.Because the replacing of coal, operating condition fluctuate
Frequently, equipment old the problems such as so that under boiler different load, the power producing characteristics of blower fan are also being continually changing, First air wind
Coal ratio, First air pulverized-coal concentration, operation oxygen amount, total blast volume etc. are all different with operation characteristic during design.In addition, run people
The operation custom of member, season (rainwater multi fuel is wet, air pressure is high low) all have an impact to fan operation characteristic.If blower fan is in peace
It is possible to have an accident when near the border of row for the national games, surge during such as low load operation and higher load operation
When stall, now blower fan can only reduce blast, unit have to reduce load to run, can cause if especially stall is serious
Fan blade ruptures, and boiler has to shut down.
Before and after the big light maintenance of unit, power plant is usually to entrust the units such as DianKeYuan to carry out performance to blower fan in different load section
Test, after being modified calculating further according to blower fan plant equipment characteristic curve, draws blowing machine on the basis of test data
The important curve such as actual motion performance curve, especially blast and air quantity, efficiency and blast, by these results, just can find out
Actual motion scope and the distance of stall point, but result of the test is not real-time, and operating mode when testing and true operation
When again can not possibly be completely the same, if real traffic coverage typically adopts close to stall point, then power plant in high load capacity
Reduce blast to run, to ensure the safety of fan operation.
But such mode can cause a series of problems, such as boiler combustion performance, blower fan economy.Such as when need more
Many First air and blower fan will not stall when, due to having forced down blast operation, it is not enough to allow for primary air ratio, affects powder system processed
The economy of system is run, the burning structure of boiler tissue；When such as pressure fan reduces blast operation again, boiler requisite oxygen can be caused
Amount is not enough so that unburned carbon in flue dust improves, and boiler economics decline.
Operations staff so how is allowed to know that the real-time operation characteristic of blower fan just seems particularly significant.Generally Power Plant DCS system
Blower fan data on system only has the parameters such as electric current, blast, air quantity (air quantity is typically again inaccurate), but these parameters are inadequate,
Fan operation characteristic can not be obtained comprehensively, need to be combined together necessary test data and fan operation data,
The real-time characteristic of fan operation can be drawn.Here it is by the measuring cell of key parameter, data transfer, data calculates and result is put
Together, form set of device.
Content of the invention
The technical problem to be solved in the present invention：Draw the real-time characteristic of fan operation.
In order to solve above-mentioned technical problem, the technical scheme is that to provide a kind of Air Fans of Utility Boilers performance real-time
The method of monitoring is it is characterised in that comprise the following steps：
The first step, on fans entrance air channel install fans entrance pressure gauge, thermocouple, fans entrance backrest
Pipe, installs fan outlet pressure gauge on fan outlet air channel, and computer gathers blower fan by pressure transmitter group and enters
The data that mouth pressure gauge, fans entrance backing tube and fan outlet pressure gauge are collected, computer passes through number
Gather the data that thermocouple is collected according to Acquisition Instrument；
Second step, acquisition operational factor, this operational factor includes：
Average dynamic pressure p at flow measurement sectiond,In formula, pdiRepresent n in flow measurement section
Time average dynamic pressure on mesh point, is obtained by fans entrance backing tube (8) measurement；
Flow q at flow measurement sectionv,In formula, A represents the area in flow measurement section, and ρ represents
Media density at flow measurement section,ρ0Represent the close of flue gas or air under standard state
Degree, PaRepresent the atmospheric pressure at flow measurement, PsRepresent the static pressure at flow measurement section, by fans entrance pressure measxurement
Measurement device obtains, and t represents the medium temperature at flow measurement section, is obtained by thermocouple measurement；
The relevant parameter in addition to air quantity being collected using the existing DCS system of power plant；
Fan outlet static pressure, is obtained by fan outlet pressure gauge measurement；
Fan electromotor input power Pe, Pe=1.732V × I × cos φ, in formula, V represents motor voltage value, passes through
The existing DCS system of power plant obtains, and I represents motor current value, is obtained by the existing DCS system of power plant, cos φ represent power because
Element.
Preferably, also include：
3rd step, the operational factor drafting characteristic curve of fan being obtained according to second step, and in real time result of calculation is shown
Picture to the existing DCS system of power plant.
The drawbacks of method that the present invention provides overcomes difficult to reach in conventional measuring method to measure grasp fan performance in real time,
The fan test data of Real-time Collection is combined with associated DC S operational factor, is calculated the effect of the currently practical operation of blower fan
Rate and operating point it is possible to be shown in characteristic curve of fan, electric power supply plant operations staff with reference to the safety judging blower fan and
Economy.
Brief description
Fig. 1 is the device scheme of installation in the inventive method；
Fig. 2 is the inventive method data acquisition and calculation flow chart；
Fig. 3 is the master drawing being eventually displayed in DCS system.
Specific embodiment
For making the present invention become apparent, hereby with preferred embodiment, and accompanying drawing is coordinated to be described in detail below.
A kind of method of Air Fans of Utility Boilers performance real-time monitoring that the present invention provides is it is characterised in that include following walking
Suddenly：
The first step, combine Fig. 1, fans entrance pressure gauge 3, thermocouple 4, blower fan are installed on fans entrance air channel
Entrance backing tube 8, installs fan outlet pressure gauge 7 on fan outlet air channel, and computer passes through pressure transmitter group 1
And rubber tube 2 gathers fans entrance pressure gauge 3, fans entrance backing tube 8 and fan outlet pressure gauge 7 and collects
The data arriving, computer gathers, by data collecting instrument 5, the data that thermocouple 4 is collected；
Second step, acquisition operational factor, in conjunction with Fig. 2, this operational factor includes air quantity, fan outlet static pressure, fan motor
Machine input power Pe and the such as electric current being collected by the existing DCS system of power plant, outlet blast, blower fan power consumption it
Other related operational factors of class.
The calculation procedure of air quantity includes：
Step 1, calculated flow rate measure the average dynamic pressure p at sectiond,In formula, pdiRepresent that flow is surveyed
Time average dynamic pressure on n mesh point in amount section, is obtained by fans entrance backing tube 8 measurement；
Step 2, calculated flow rate measure the flow q at sectionv, as air quantity,In formula, A represents flow
The area in measurement section, ρ represents the Media density at flow measurement section,ρ0Expression standard
The density of flue gas or air, P under stateaRepresent the atmospheric pressure at flow measurement, PsRepresent the static pressure at flow measurement section,
Obtained by fans entrance pressure gauge 3 measurement, t represents the medium temperature at flow measurement section, is surveyed by thermocouple 4
Measure.
Fan outlet static pressure, is obtained by fan outlet pressure gauge 7 measurement；
Fan electromotor input power Pe, Pe=1.732V × I × cos φ, in formula, V represents motor voltage value, passes through
The existing DCS system of power plant obtains, and I represents motor current value, is obtained by the existing DCS system of power plant, cos φ represent power because
Element.
3rd step, the operational factor drafting characteristic curve of fan being obtained according to second step, and in real time result of calculation is shown
To the picture of the existing DCS system of power plant, can intuitively show performance and the secure border of blowing machine, as shown in Figure 3.
The method that the present invention provides has safely provided and has intuitively ensured not just for the operation of blower fan, but also drops for energy-conservation
Consumption provides in real time intuitively foundation.
Claims (2)
1. a kind of method of Air Fans of Utility Boilers performance real-time monitoring is it is characterised in that comprise the following steps：
The first step, on fans entrance air channel install fans entrance pressure gauge (3), thermocouple (4), fans entrance backrest
Pipe (8), installs fan outlet pressure gauge (7) on fan outlet air channel, and computer is adopted by pressure transmitter group (1)
Wind collector inlet pressure measurement apparatus (3), fans entrance backing tube (8) and fan outlet pressure gauge (7) are collected
Data, computer gathers, by data collecting instrument (5), the data that thermocouple (4) is collected；
Second step, acquisition operational factor, this operational factor includes：
Average dynamic pressure p at flow measurement sectiond,In formula, pdiRepresent n grid in flow measurement section
Time average dynamic pressure on point, is obtained by fans entrance backing tube (8) measurement；
Flow q at flow measurement sectionv,In formula, A represents the area in flow measurement section, and ρ represents flow
Media density at measurement section,ρ0Represent the density of flue gas or air under standard state, Pa
Represent the atmospheric pressure at flow measurement, PsRepresent the static pressure at flow measurement section, by fans entrance pressure gauge
(3) measurement obtains, and t represents the medium temperature at flow measurement section, is obtained by thermocouple (4) measurement；
The relevant parameter in addition to air quantity being collected using the existing DCS system of power plant；
Fan outlet static pressure, is obtained by fan outlet pressure gauge (7) measurement；
Fan electromotor input power Pe, Pe=1.732V × I × cos φ, in formula, V represents motor voltage value, by power plant
Existing DCS system obtains, and I represents motor current value, is obtained by the existing DCS system of power plant, cos φ represents power factor (PF).
2. as claimed in claim 1 a kind of method of Air Fans of Utility Boilers performance real-time monitoring it is characterised in that also including：
3rd step, the operational factor drafting characteristic curve of fan being obtained according to second step, and show result of calculation to electricity in real time
The picture of the existing DCS system of factory.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610782247.2A CN106441962A (en) | 2016-08-30 | 2016-08-30 | Method for real-time monitoring of performance of fan of boiler in power station |
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| CN201610782247.2A CN106441962A (en) | 2016-08-30 | 2016-08-30 | Method for real-time monitoring of performance of fan of boiler in power station |
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| CN201610782247.2A Pending CN106441962A (en) | 2016-08-30 | 2016-08-30 | Method for real-time monitoring of performance of fan of boiler in power station |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109099001A (en) * | 2018-09-14 | 2018-12-28 | 国网河北省电力有限公司电力科学研究院 | Measure the detection platform and method of station boiler air inducing engine efficiency |
| CN110469530A (en) * | 2019-07-30 | 2019-11-19 | 广西电网有限责任公司电力科学研究院 | Station boiler axle induced-draft fan Performance Test System and its Efficiency test method |
| CN111536554A (en) * | 2020-05-21 | 2020-08-14 | 哈尔滨工业大学 | Induced draft fan stall control method for preventing boiler MFT from being triggered |
| CN112412861A (en) * | 2020-11-19 | 2021-02-26 | 国能开远发电有限公司 | Method and system for realizing visualization of running working point of axial flow fan |
| CN112594208A (en) * | 2020-12-07 | 2021-04-02 | 广州市耀安实业发展有限公司 | Fan flow detection method and system, computer equipment and storage medium |
| CN113253018A (en) * | 2021-04-20 | 2021-08-13 | 苏州西热节能环保技术有限公司 | Electric energy balance monitoring method for coal-fired power plant |
| CN113379217A (en) * | 2021-05-31 | 2021-09-10 | 浙江浙能技术研究院有限公司 | Power station boiler fan efficiency real-time online calculation method based on DCS parameters |
| CN113669294A (en) * | 2021-07-29 | 2021-11-19 | 华能(浙江)能源开发有限公司玉环分公司 | Induced draft fan stall early warning method |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109099001A (en) * | 2018-09-14 | 2018-12-28 | 国网河北省电力有限公司电力科学研究院 | Measure the detection platform and method of station boiler air inducing engine efficiency |
| CN110469530A (en) * | 2019-07-30 | 2019-11-19 | 广西电网有限责任公司电力科学研究院 | Station boiler axle induced-draft fan Performance Test System and its Efficiency test method |
| CN111536554A (en) * | 2020-05-21 | 2020-08-14 | 哈尔滨工业大学 | Induced draft fan stall control method for preventing boiler MFT from being triggered |
| CN111536554B (en) * | 2020-05-21 | 2022-02-08 | 哈尔滨工业大学 | Induced draft fan stall control method for preventing boiler MFT from being triggered |
| CN112412861A (en) * | 2020-11-19 | 2021-02-26 | 国能开远发电有限公司 | Method and system for realizing visualization of running working point of axial flow fan |
| CN112594208A (en) * | 2020-12-07 | 2021-04-02 | 广州市耀安实业发展有限公司 | Fan flow detection method and system, computer equipment and storage medium |
| CN113253018A (en) * | 2021-04-20 | 2021-08-13 | 苏州西热节能环保技术有限公司 | Electric energy balance monitoring method for coal-fired power plant |
| CN113379217A (en) * | 2021-05-31 | 2021-09-10 | 浙江浙能技术研究院有限公司 | Power station boiler fan efficiency real-time online calculation method based on DCS parameters |
| CN113669294A (en) * | 2021-07-29 | 2021-11-19 | 华能(浙江)能源开发有限公司玉环分公司 | Induced draft fan stall early warning method |
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Application publication date: 20170222 |