CN108613162A - Station boiler based on strain measurement suspends heating surface fouling monitoring system and method in midair - Google Patents
Station boiler based on strain measurement suspends heating surface fouling monitoring system and method in midair Download PDFInfo
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- CN108613162A CN108613162A CN201810592469.7A CN201810592469A CN108613162A CN 108613162 A CN108613162 A CN 108613162A CN 201810592469 A CN201810592469 A CN 201810592469A CN 108613162 A CN108613162 A CN 108613162A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 77
- 238000012544 monitoring process Methods 0.000 title claims abstract description 18
- 238000005259 measurement Methods 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000007664 blowing Methods 0.000 claims abstract description 73
- 239000004071 soot Substances 0.000 claims abstract description 62
- 230000005540 biological transmission Effects 0.000 claims abstract description 17
- 238000006243 chemical reaction Methods 0.000 claims abstract description 8
- 238000010977 unit operation Methods 0.000 claims abstract description 5
- 238000010926 purge Methods 0.000 claims description 10
- 238000004891 communication Methods 0.000 claims description 7
- 238000005457 optimization Methods 0.000 claims description 5
- 239000011888 foil Substances 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 2
- 239000004744 fabric Substances 0.000 claims 1
- 239000003245 coal Substances 0.000 abstract description 14
- 239000000725 suspension Substances 0.000 abstract description 5
- 230000007812 deficiency Effects 0.000 abstract description 2
- 230000004044 response Effects 0.000 abstract description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000003546 flue gas Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000002817 coal dust Substances 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 238000013517 stratification Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001815 facial effect Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/56—Boiler cleaning control devices, e.g. for ascertaining proper duration of boiler blow-down
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Incineration Of Waste (AREA)
Abstract
The invention discloses a kind of, and the station boiler based on strain measurement suspends heating surface fouling monitoring system and method in midair, which includes unit DCS, data acquisition device, data transmission set and soot blowing and optimal PLC；Data acquisition device includes strain transducer and temperature sensor, is arranged on the load-bearing sunpender of suspention heating surface, and be connected with soot blowing and optimal PLC, for load-bearing sunpender strain signal and temperature signal to be transmitted to soot blowing and optimal PLC；Data transmission set is connected with unit DCS and soot blowing and optimal PLC respectively, for related unit operation parameter to be transmitted to soot blowing and optimal PLC；Soot blowing and optimal PLC is calculated according to strain signal, temperature signal and unit operation parameter and is suspended the relevant conversion strain signal S of fouling of heating surface slagging degree in midair, and sends out corresponding soot blowing and optimal signal；The present invention can in real time, accurate response boiler suspension fouling of heating surface slagging degree, can be used for instructing and control various pulverized-coal fired boilers quantitatively to be purged according to the practical fouling and slagging situation of heating surface, solves the problems, such as that boiler soot-blowing is excessive and soot blowing deficiency.
Description
Technical field
It is measured the present invention relates to Power Plant Thermal and field of intelligent control technology, and in particular to a kind of based on strain measurement
Station boiler suspends heating surface fouling monitoring system and method in midair.
Background technology
In generating plant pulverized coal boiler operational process, coal dust is water cooled wall suction in burner hearth internal-combustion, a part of heat of release
It receives, for water supply to be heated to be saturated vapor, high-temperature flue gas flows through superheater, and saturated vapor is heated into certain steam product
The superheated steam of matter, is sent into steam turbine high-pressure cylinder acting, and steam turbine high-pressure cylinder steam discharge is heated into and superheated steam phase by reheater
Then the steam of nearly temperature is re-fed into Steam Turbine Through IP Admission and low pressure (LP) cylinder acting.Along with the mistake of coal dust firing and flow of flue gas
The particulate matter of journey, non-combustible mineral formation can be deposited on boiler heating surface, lead to the different degrees of fouling and slagging of heating surface.Slagging
The higher radiation heat transfer region of in-furnace temperature is occurred mainly in, as water-cooling wall or pendant superheater slagging, dust stratification occur mainly in
The lower heat convection area of flue-gas temperature.
Domestic coal unit has the characteristics that coal quality is changeable, load variations are big, it is inferior to use coal coal quality mostly, exacerbates
The fouling and slagging degree of heating surface seriously affects safe and economical boiler operation.Large thermal power plant is equipped with steam soot blowing and sets mostly
It is standby, start slag-blowing equipmemt generally according to fixed soot blowing sequence timing and heating surface is cleaned, or is passed through by operations staff
Experience selectively purges heating surface.This random purge mode of soot-blowing mode or operations staff at regular time and quantity is not
Consider the practical fouling and slagging situation of each heating surface of boiler, it is likely that cause the serious heating surface soot blowing of fouling and slagging insufficient, and
The slight heating surface excessive soot blowing of fouling and slagging.Soot blowing deficiency can reduce the heat transfer property of boiler heating surface, lead to boiler exhaust gas
Temperature increases, and boiler efficiency declines；Excessive soot blowing not only waste a large amount of steam blowing media but also frequently purge also increase by
The danger of hot facial canal wall booster.Therefore, there is prodigious Optimal improvements space for existing soot-blowing mode.
Boiler soot-blowing optimization is studied by lot of domestic and international research institution.External Emerson companies
The SootOpt products of Sootblower Optimization systems, NeuCo companies are all based on the hard measurements hand such as thermodynamic computing
Section establishes the contamination model of boiler heating surface, realizes intelligent ash blowing.Chinese patent (2009100209232) discloses a kind of base
In the intelligent ash blowing control system of sound wave gas temperature field measuring technique, connect by the way that sound wave transmitting is arranged in boiler heating surface side
Sensor is received, to measure the flue-gas temperature of boiler heating surface indirectly, using mathematics measurement model, by the dust stratification of each heating surface of boiler
Degree carries out quantification treatment, instructs the on-demand soot blowing of boiler sootblower.Chinese patent (2010105368204) discloses one kind and is based on
The boiler furnace soot-blowing control device of heat flow on-line measurement, by the heat flow signal for acquiring burner hearth surrounding fin panel casing fin
To judge the contamination situation in each region of boiler furnace water-cooling wall, the realization on-demand soot blowing of water cooling wall region.Due to domestic pulverized-coal fired boiler
Coal quality and the changeable feature of load, cause based on boiler heating surface stain the soot blowing and optimal method that model calculates be applied to suspention by
Hot face fouling monitoring practical application effect is unsatisfactory.It is surveyed online based on sound wave gas temperature field measuring technique and based on heat flow
The soot blowing that the soot blowing and optimal method of amount technology is only applicable to the radiation heating-surfaces such as water-cooling wall judges, is not suitable for suspending heating surface area in midair
The monitoring of grey slagging degree.
Invention content
It is of the existing technology it is an object of the invention to solve the problems, such as, and then a kind of power station based on strain measurement is provided
Boiler suspension heating surface fouling monitoring system and method, can be used for instructing and control the optimization of various pulverized-coal fired boiler heating surface soot blowings
Operation, quantitatively purges according to the practical fouling and slagging situation of heating surface, solves the problems, such as that boiler soot-blowing is excessive and soot blowing is insufficient.
To achieve the above object, the present invention adopts the following technical scheme that：
A kind of station boiler suspention heating surface fouling monitoring system based on strain measurement, including the acquisition of unit DCS, data
Device, data transmission set, soot blowing and optimal PLC；
The data acquisition device is connected with the soot blowing and optimal PLC；It is described including strain transducer and temperature sensor
Strain transducer and temperature sensor are arranged on the load-bearing sunpender of suspention heating surface, and temperature sensor is arranged in strain sensing
Device close position；The whole load-bearing sunpenders or part of representative load-bearing sunpender of each suspention heating surface are arranged with strain and pass
Sensor and temperature sensor, strain size and temperature change for acquiring load-bearing sunpender point position；
The equipment that the suspention heating surface is arranged on the heating steam of boiler internal, the load-bearing sunpender is the suspention
The bearing equipment of heating surface, each heating surface that suspends in midair are suspended to boiler internal by multiple load-bearing sunpender load-bearing；
The data transmission set is connected with unit DCS and soot blowing and optimal PLC, for unit correlation operating parameter to be transmitted to
Soot blowing and optimal PLC, while the soot blowing and optimal PLC Optimal Parameters generated are transmitted to unit DCS system, instruct operations staff rationally to blow
Ash；
The soot blowing and optimal PLC includes controller unit, analog input unit and communication unit, and wherein communication unit is used
The unit part operating parameter of data transmission set input is received, analog input unit adopts for receiving data acquisition device
The strain of collection and temperature signal.
Preferably, the strain transducer is foil gage, and foil gage position is in load-bearing sunpender
At 1/5 position of top.
Preferably, described that temperature sensor is answered to carry air purge set, for keeping temperature sensor surface cleaning.
The present invention also provides a kind of, and the generating plant pulverized coal boiler based on strain measurement suspends heating surface fouling monitoring method, packet in midair
Include following steps：
Step (1), the strain transducer acquisition t moment suspention heating surface in data acquisition device correspond on load-bearing sunpender
Strain signal St1,St2,St3…Stm；
Step (2), the temperature sensor acquisition t moment suspention heating surface in data acquisition device correspond on load-bearing sunpender
Temperature signal Tt1,Tt2,Tt3…Ttn；
T moment unit primary operating parameter is transmitted to logical in soot blowing and optimal PLC by step (3), data transmission set
Unit is interrogated, while the analog input unit in soot blowing and optimal PLC receives strain and the temperature signal of data acquisition device acquisition；
Step (4), the controller unit in soot blowing and optimal PLC calculate being averaged for t moment suspention heating surface load-bearing sunpender
Temperature T,
Step (5), the controller unit in soot blowing and optimal PLC calculate the conversion of t moment suspention heating surface load-bearing sunpender
S is strained,
In formula, a is the number for suspending all load-bearing sunpenders of heating surface in midair, and m is the load-bearing sunpender for being equipped with strain transducer
Number, CTIt is and the relevant conversion factor of t moment load-bearing sunpender mean temperature, CRIt is and the relevant folding of t moment unit operation parameter
Calculate coefficient；
Step (6), soot blowing and optimal PLC compare conversion strain S and strain upper limit set value SmaxIf continuous several times, preferably
Ground, 3 times, S>Smax, then soot blowing and optimal PLC soot blowing signal is sent out by data transmission set and gives unit DCS, remind operations staff
The corresponding heating surface of purging in time.
In general, through the invention it is contemplated above technical scheme is compared with the prior art, can obtain down and show
Beneficial effect：
The present invention can be used for instructing and control the optimization operation of various pulverized-coal fired boiler heating surface soot blowings, according to heating surface reality
Fouling and slagging situation quantitatively purges, and solves the problems, such as that boiler soot-blowing is excessive and soot blowing is insufficient.
The present invention reacts boiler suspension heating surface by directly acquiring the strain of the load-bearing sunpender of boiler suspension heating surface
Weight increases situation, and the temperature by acquiring load-bearing sunpender is corrected the strain, is corresponded to by unit real time execution parameter
Become carry out secondary correction, can in real time, accurate response boiler suspension fouling of heating surface slagging degree, instruct operations staff rationally to blow
Ash.
Description of the drawings
Fig. 1 is the generating plant pulverized coal boiler suspention heating surface fouling monitoring based on strain measurement described in the embodiment of the present invention
The structural schematic diagram of system.
Fig. 2 is the structural schematic diagram of the suspention heating surface described in the embodiment of the present invention.
In all the appended drawings, identical reference numeral is used for indicating identical element or structure, wherein：
The steam inlets 1- load-bearing sunpender 2- header 3- steam (vapor) outlet headers
4- column pipe 5- strain transducer 6- temperature sensors
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in the various embodiments of the present invention described below
It does not constitute a conflict with each other and can be combined with each other.
Fig. 1 is the generating plant pulverized coal boiler suspention heating surface fouling monitoring based on strain measurement described in the embodiment of the present invention
The structural schematic diagram of system, as seen from the figure comprising unit DCS, data acquisition device, data transmission set, soot blowing and optimal
PLC。
Fig. 2 is the structural schematic diagram of the suspention heating surface described in the embodiment of the present invention, as seen from the figure comprising load-bearing is hung
Bar 1, steam inlet header 2, steam (vapor) outlet header 3, column pipe 4, strain transducer 5, temperature sensor 6.
The data acquisition device includes strain transducer 5 and temperature sensor 6, the strain transducer 5 and the temperature
Degree sensor 6 is arranged on the load-bearing sunpender 1 of suspention heating surface, and the temperature sensor 5 is arranged in the strain transducer
Close position；The whole load-bearing sunpenders or part of representative load-bearing sunpender of each suspention heating surface are arranged with strain sensing
Device 5 and temperature sensor 6, strain size and temperature change for acquiring load-bearing sunpender point position；
The equipment that the suspention heating surface is arranged on the heating steam of boiler internal, the load-bearing sunpender is the suspention
The bearing equipment of heating surface, each suspention heating surface are suspended to boiler internal by multiple load-bearing sunpender load-bearing；
The data acquisition device is connected with the soot blowing and optimal PLC；
The data transmission set is connected with unit DCS and soot blowing and optimal PLC, for unit correlation operating parameter to be transmitted to
Soot blowing and optimal PLC, while the soot blowing and optimal PLC Optimal Parameters generated are transmitted to unit DCS system, instruct operations staff rationally to blow
Ash；
The soot blowing and optimal PLC includes controller unit, analog input unit and communication unit, and wherein communication unit is used
The unit part operating parameter of data transmission set input is received, analog input unit adopts for receiving data acquisition device
The strain of collection and temperature signal.
The present invention also provides a kind of, and the generating plant pulverized coal boiler based on strain measurement suspends heating surface fouling monitoring method, packet in midair
Include following steps：
Step (1), strain transducer 5 acquire t moment suspention heating surface and correspond to the strain signal S on load-bearing sunpendert1,
St2,St3…Stm；
Step (2), temperature sensor 6 acquire t moment suspention heating surface and correspond to the temperature signal T on load-bearing sunpendert1,
Tt2,Tt3…Ttn；
T moment unit primary operating parameter is transmitted to logical in soot blowing and optimal PLC by step (3), data transmission set
Unit is interrogated, while the analog input unit in soot blowing and optimal PLC receives strain and the temperature signal of data acquisition device acquisition；
Step (4), the controller unit in soot blowing and optimal PLC calculate being averaged for t moment suspention heating surface load-bearing sunpender
Temperature T,
Step (5), the controller unit in soot blowing and optimal PLC calculate the conversion of t moment suspention heating surface load-bearing sunpender
S is strained,
In formula, a is the number for suspending all load-bearing sunpenders of heating surface in midair, and m is the load-bearing sunpender for being equipped with strain transducer
Number, CTIt is and the relevant conversion factor of t moment load-bearing sunpender mean temperature, CRIt is and the relevant folding of t moment unit operation parameter
Calculate coefficient；
Step (6), soot blowing and optimal PLC compare conversion strain S and strain upper limit set value SmaxIf continuous several times, preferably
Ground, 3 times, S>Smax, then soot blowing and optimal PLC soot blowing signal is sent out by data transmission set and gives unit DCS, remind operations staff
The corresponding heating surface of purging in time.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, all within the spirits and principles of the present invention made by all any modification, equivalent and improvement etc., should all include
Within protection scope of the present invention.
Claims (5)
1. a kind of station boiler based on strain measurement suspends heating surface fouling monitoring system in midair, it is characterised in that：Including unit
DCS, data acquisition device, data transmission set, soot blowing and optimal PLC, wherein
The data acquisition device is connected with the soot blowing and optimal PLC；Including strain transducer and temperature sensor, the strain
Sensor and temperature sensor are arranged on the load-bearing sunpender of suspention heating surface, and temperature sensor is arranged in strain transducer neighbour
Near position；The whole load-bearing sunpenders or part of representative load-bearing sunpender of each suspention heating surface are arranged with strain transducer
And temperature sensor, strain size and temperature change for acquiring load-bearing sunpender point position；The suspention heating surface is cloth
The equipment in the heating steam of boiler internal is set, the load-bearing sunpender is the bearing equipment of the suspention heating surface, each to suspend in midair
Heating surface is suspended to boiler internal by multiple load-bearing sunpender load-bearing；
The data transmission set is connected with unit DCS and soot blowing and optimal PLC, for unit correlation operating parameter to be transmitted to soot blowing
Optimize PLC, while the soot blowing and optimal PLC Optimal Parameters generated are transmitted to unit DCS, instructs the reasonable soot blowing of operations staff；
The soot blowing and optimal PLC includes controller unit, analog input unit and communication unit, and wherein communication unit is used for connecing
The unit part operating parameter of data transmission set input is received, analog input unit is used to receive data acquisition device acquisition
Strain and temperature signal.
2. a kind of station boiler based on strain measurement according to claim 1 suspends heating surface fouling monitoring system in midair,
It is characterized in that, the strain transducer is foil gage, and foil gage position is 1/5 above load-bearing sunpender
At position.
3. a kind of station boiler based on strain measurement according to claim 1 suspends heating surface fouling monitoring system in midair,
It is characterized in that, it is described that temperature sensor is answered to carry air purge set, for keeping temperature sensor surface cleaning.
4. the monitoring method of the station boiler suspention heating surface fouling monitoring system based on strain measurement described in claim 1,
It is characterized in that, includes the following steps：
Step (1), the strain transducer acquisition t moment suspention heating surface in data acquisition device correspond to answering on load-bearing sunpender
Varying signal St1,St2,St3…Stm；
Step (2), the temperature sensor acquisition t moment suspention heating surface in data acquisition device correspond to the temperature on load-bearing sunpender
Spend signal Tt1,Tt2,Tt3…Ttn；
T moment unit primary operating parameter is transmitted to the communication list in soot blowing and optimal PLC by step (3), data transmission set
Member, while the analog input unit in soot blowing and optimal PLC receives strain and the temperature signal of data acquisition device acquisition；
Step (4), the controller unit in soot blowing and optimal PLC calculate the mean temperature of t moment suspention heating surface load-bearing sunpender
T,
Step (5), the controller unit in soot blowing and optimal PLC calculate the conversion strain of t moment suspention heating surface load-bearing sunpender
S,
In formula, a is the number for suspending all load-bearing sunpenders of heating surface in midair, and m is the number for the load-bearing sunpender for being equipped with strain transducer,
CTIt is and the relevant conversion factor of t moment load-bearing sunpender mean temperature, CRIt is to be with the relevant conversion of t moment unit operation parameter
Number；
Step (6), soot blowing and optimal PLC compare conversion strain S and strain upper limit set value SmaxIf continuous several times S>Smax, then blow
Ash optimization PLC sends out soot blowing signal by data transmission set and gives unit DCS, reminds operations staff to purge in time corresponding heated
Face.
5. monitoring method according to claim 4, it is characterised in that：Continuous several times described in step (6) refer to continuous 3
It is secondary.
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|---|---|---|---|
| CN201810592469.7A CN108613162A (en) | 2018-06-11 | 2018-06-11 | Station boiler based on strain measurement suspends heating surface fouling monitoring system and method in midair |
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|---|---|---|---|
| CN201810592469.7A CN108613162A (en) | 2018-06-11 | 2018-06-11 | Station boiler based on strain measurement suspends heating surface fouling monitoring system and method in midair |
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Family
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Cited By (3)
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| CN110578933A (en) * | 2019-09-16 | 2019-12-17 | 华能国际电力股份有限公司 | Dust deposition on-line monitoring system and monitoring method for convection heat exchanger at tail of coal-fired boiler |
| WO2020225489A1 (en) * | 2019-05-09 | 2020-11-12 | Andritz Oy | A method and an arrangement for measuring mass changes of heat exchangers of a steam boiler |
| RU2806128C2 (en) * | 2019-05-09 | 2023-10-26 | Андритц Ой | Method and device for measuring changes in the mass of heat exchangers of a steam boiler |
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| WO2020225489A1 (en) * | 2019-05-09 | 2020-11-12 | Andritz Oy | A method and an arrangement for measuring mass changes of heat exchangers of a steam boiler |
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| RU2806128C2 (en) * | 2019-05-09 | 2023-10-26 | Андритц Ой | Method and device for measuring changes in the mass of heat exchangers of a steam boiler |
| CN110578933A (en) * | 2019-09-16 | 2019-12-17 | 华能国际电力股份有限公司 | Dust deposition on-line monitoring system and monitoring method for convection heat exchanger at tail of coal-fired boiler |
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Application publication date: 20181002 |