CN108930977B - A kind of furnace combustion state real-time online acquisition methods - Google Patents
A kind of furnace combustion state real-time online acquisition methods Download PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
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Abstract
The present invention relates to a kind of furnace combustion state real-time online acquisition methods, comprising the following steps: 1) operation data and coal amount director data can be surveyed by obtaining current time corresponding boiler carbonated drink side in DCS system；2) operation data estimation current time corresponding effective caloric receptivity can be surveyed according to boiler carbonated drink side；3) according to coal amount director data estimate current time it is corresponding enter the total coal amount of furnace；4) according to the hearth combustion economic index corresponding with furnace total coal amount acquisition current time is entered that effectively recepts the caloric of acquisition；5) off-line identification is carried out to the dynamic characteristic parameter of fired power generating unit pulverizing process.Compared with prior art, the present invention can rapidly and accurately reflect state change of burning in furnace, optimize and revise for burning in furnace and provide effective hard measurement information；And the technical bottleneck of the direct metrical information scarcity of combustion state caused by complicated hot environment in burner hearth is breached, without installing any hardware facility additional, have the advantages that calculate easy and easy to implement.
Description
Technical field
The present invention relates to thermal technology's soft-measuring technique fields, more particularly, to a kind of furnace combustion state real-time online acquisition side
Method.
Background technique
As China's power market reform is deepened, in order to increase the market competitiveness, thermal power generation corporations run unit
Economy, the boiler Dynamic Burning optimization performance especially in variable parameter operation propose new demand.In unit stable state and
During variable load operation, it is telling for thermal power generation corporations that real-time control pollutant, which generates and improves combustion economization as far as possible,
It asks.Although the detection technique of furnace radiant energy signal is developed in recent years, and runs in part Installation in Plant, absolutely mostly
The in-service fired power generating unit of number does not have this technology.Therefore, in conjunction with the existing parameter monitoring technology of fired power generating unit and operation data, lead to
Cross theory analysis make full use of it is existing in DCS system survey operation data resource, obtain to reflect hearth combustion economy in real time
Property and be easy to calculate substitute variable, be the key that realize the optimal control of boiler Dynamic Burning.
The absence of information of hearth combustion economy is mainly excessively high due to burn in furnace bad environments, temperature, is difficult to pass through
Conventional sensor technology obtains accurate combustion state parameter.In contrast, the carbonated drink side parameter of burner hearth flue gas heat exchange is received
State inspection it is relatively complete.When combustion position changes in furnace, due to boiler heat exchange process dynamic process when
Between it is shorter, be arranged in burner hearth surrounding and top vapo(u)rization system and superheater high temperature section it is effective caloric receptivity will quickly ring
It answers, drum pressure, main steam thermal parameter can also change therewith.Therefore, it can be used by the estimation of carbonated drink side measurable parameters
Boiler, which effectively recepts the caloric, characterizes combustion intensity in furnace.On the other hand, it is contemplated that it is that conventional rack coordinates control that boiler, which effectively recepts the caloric,
Important controlled variable in system processed.Especially in direct energy blance Coordinated Control Systems, effectively recept the caloric with boiler
Relevant heat signal is even more directly as controlled volume.Combustion state caused by complicated hot environment directly to measure in burner hearth
Absence of information, current technology generally requires installation hardware facility and carrys out subsidiary, and can not rapidly and accurately reflect furnace internal combustion
State change is burnt, effective hard measurement information can not be provided by optimizing and revising to burning in furnace.
Summary of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of furnace combustion states
Real-time online acquisition methods.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of furnace combustion state real-time online acquisition methods, method includes the following steps:
Step 1: the requirement effectively to be recepted the caloric according to boiler steam and water circuit, obtains current time corresponding pot in DCS system
Furnace carbonated drink side can survey operation data and coal amount director data；
Boiler carbonated drink side can survey the drum outlet vapor flow that operation data is estimationIts expression formula are as follows:
In formula, τ is current time, and Δ τ is sampling period, qattFor desuperheat spray flow, pt、Tt、ρt、qtRespectively overheat
Pressure, temperature, density and the flow of steam, VshFor the volume in high temperature superheater pipeline.
Step 2: having for operation data estimation current time corresponding vapo(u)rization system can be surveyed according to the boiler carbonated drink side of acquisition
Effective caloric receptivity of effect caloric receptivity and boiler totality；
Effective caloric receptivity of vapo(u)rization systemIt can be obtained by following estimation formula:
Wherein,
In formula, KdFor the regenerative capacity of vapo(u)rization system, hsFor drum outlet vapor enthalpy, ρsw、Vsw、hswRespectively evaporation system
Density, volume and the enthalpy of water, c in unitingpw、mwtThe respectively specific heat capacity and gross mass of vapo(u)rization system tube metal.
Effective caloric receptivity of boiler totalityCalculation expression are as follows:
In formula,It is the corresponding flue gas of current time τ in the economizer and low temperature mistake for being arranged in burner hearth back-end ductwork
The heat exchange amount of the equipment such as hot device,Indicate effective heat exchange amount of the flue gas in hyperthermia and superheating section, htFor the enthalpy of superheated steam,
qattFor the desuperheat spray flow of high temperature superheater entrance, hfwFor Enthalpy of Feed Water, msh,cpshRespectively in high temperature superheater pipeline
Tube metal quality and specific heat capacity, TtFor the temperature of superheated steam, pdFor drum pressure.
Estimation expression formula of the flue gas in effective heat exchange amount of hyperthermia and superheating section are as follows:
In formula, hsh1For high temperature superheater inlet steam enthalpy.
The corresponding flue gas of current time τ is changed the equipment such as economizer and the low temperature superheater for being arranged in burner hearth back-end ductwork
HeatExpression formula are as follows:
Step 3: estimating current time corresponding furnace coal weight according to the coal amount director data of acquisition, and obtain total into furnace
Coal amount, specifically includes the following steps:
31) unit pulverized-coal system puts into corresponding coal amount to feeder according to fuel command, since fuel transmission process needs
The time is wanted, the dynamic process of pulverized coal preparation system delays link there are pure, it is expressed as follows:
In formula, rf,IFor the fuel command of tier I combustion zone, unit kg/s；For the practical coal for entering coal pulverizer I
Amount, unit kg/s；δ is delay time, unit s；
32) every coal pulverizer provides the as-fired coal powder amount met the requirements for one layer of burner, the coal storage of coal pulverizer and its
It is directly proportional to export pulverized coal flow, and the following first order inertial loop of its dynamic characteristic indicates:
In formula, qf,IFor the as-fired coal powder flow of tier I combustion zone；kfFor coal pulverizer dynamic time constant；
33) the corresponding boiler of current time τ enters the summation that the total coal amount of furnace is each layer furnace coal weight, and calculation expression is as follows
It is shown:
In formula, qf(τ) enters the total coal amount of furnace for current time τ's.
Step 4: according to Step 2: effectively recepting the caloric and entering the total coal amount acquisition of furnace for the vapo(u)rization system that step 3 obtains is worked as
Preceding moment corresponding hearth combustion economic index；
When combustion position changes in furnace, effective caloric receptivity of vapo(u)rization systemIt is arranged in the water-cooling wall in burner hearth
Effectively effective heat exchange amount of caloric receptivity and hyperthermia and superheating sectionIt will change correspondingly, especially be located near primary combustion zoneIt can most reflect the variation of combustion position in furnace in time.When in furnace combustion intensity increase when, water supply vapo(u)rization system receive with
Based on radiation energyAlso it can increase accordingly；Conversely, then reducing.The present invention is with effective caloric receptivity of water supply vapo(u)rization systemMake
For the state variable for reflecting combustion position in furnace real-time, quickly.It is corresponding in order to evaluate and test unit current time τ during varying duty
Hearth combustion economy, can be by effective caloric receptivity of the vapo(u)rization systemIt is converted to effective caloric receptivity of unit of fuel amount, and
Using it as the hard measurement information of the corresponding hearth combustion economy of reflection current time τ, it is converted to the effective of unit of fuel amount
Caloric receptivityExpression formula are as follows:
Step 5: the dynamic characteristic parameter to fired power generating unit pulverizing process carries out off-line identification；
The dynamic characteristic parameter of fired power generating unit pulverizing process includes inertia time and delay time.It is transported in Present Thermal Power unit
During row, total coal dust amount mean allocation in each coal pulverizer, and the dynamic characteristic of each powder manufacturing apparatus is consistent.Cause
This, is effectively recepted the caloric with the vapo(u)rization system of each sampled point estimation as output, and collected coal amount instruction operation data is input, root
It can recognize to obtain two dynamic characteristic parameters of pulverizing process according to following formula.To the dynamic characteristic parameter of fired power generating unit pulverizing process into
The expression formula of row off-line identification are as follows:
In formula, kQTo estimate effective caloric receptivity of obtained vapo(u)rization system and the proportionality coefficient for entering the total coal amount of furnace.
Compared with prior art, the invention has the following advantages that
(1) the present invention is based on conservations of energy principle, sufficiently excavate boiler vapour included in the common DCS system of fired power generating unit
Water side can survey the useful information in operation data, enter boiler vapour corresponding to furnace fuel quantity by each sampled point unit of real-time estimation
Water system effectively recepts the caloric and enters the total coal amount of furnace, can rapidly and accurately reflect state change of burning in furnace, is burning in furnace
It optimizes and revises and provides effective hard measurement information；
(2) present invention breaches the skill of the direct metrical information scarcity of combustion state caused by complicated hot environment in burner hearth
Art bottleneck has the advantages that calculate easy and easy to implement without installing any hardware facility additional.
Detailed description of the invention
Fig. 1 is the implementing procedure block diagram of the method for the present invention；
Fig. 2 is object thermal power unit boiler-steam turbine equipment structural schematic diagram of the invention；
Fig. 3 is object pulverizing process dynamic performance model fitting precision proof diagram of the invention.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment
In order to assess boiler furnace combustion economization in real time, each sampling instant furnace coal weight q is neededfThe real time data of (τ).
Due to not including the reality of furnace coal weight in unit DCS system (Distributed Control System, Distributed Control System)
Measurement information, therefore real-time estimation is carried out to it.Known coal dust need to first pass around pulverizing process before entering hearth combustion.
For real-time estimation furnace coal weight, need to determine pulverized coal preparation system dynamic characteristic offline first.Blowing powder producing process dynamic model master
It to include two parameters to be identified of inertia time and delay time.
The history fortune that the present embodiment is recorded with Zhejiang No.3 in Power Plant 300MW dum boiler fossil-fired unit DCS system
Row data instance is illustrated furnace combustion state real-time estimating method proposed by the invention.Set data sampling period
11 carbonated drink side data measuring points as shown in Table 1 and 5 coal amounts in the corresponding unit DCS system of Vt=1s, acquisition current time τ
Data measuring point.
The DCS operation data point relevant to model of table 1 summarizes
In boiler system, burning dynamic process is negligible relative to pulverizing process in furnace.In other words, in boiler system
The dynamic change of furnace coal weight and combustion state parameter each in furnace is always consistent in system.Accordingly, it is considered to using main combustion is located at
The water supply vapo(u)rization system for burning region surrounding effectively recept the caloric real-time estimation value, and the substitute variable as furnace coal weight is used to dynamically join
Number identification.Acquiring interior boiler drum side relevant to effective caloric receptivity estimation of vapo(u)rization system of several periods in sampling period offline can
Operation data is surveyed, and the unit coal amount of corresponding period instructs operation data.
As shown in Figure 1, this method includes following step the present invention relates to a kind of furnace combustion state real-time online acquisition methods
It is rapid:
S1: the carbonated drink side data measuring point and coal amount data measuring point in DCS system are chosen:
In boiler actual moving process, drum outlet vapor flow generally can not be measured directly, can pass through current time τ
Corresponding main steam flow, desuperheat amount of water sprayed and superheated steam system dynamic characteristic relevant boiler carbonated drink side can survey operation number
According to being calculated as follows to obtain:
In formula,To estimate obtained drum outlet vapor flow, unit kg/s；Δ τ is sampling period, unit s；
qattFor desuperheat spray flow, unit kg/s；pt、Tt、ρt、qtThe respectively pressure, temperature, density and flow of superheated steam,
Unit be respectively MPa, DEG C, kg/m3And kg/s；VshFor the volume in high temperature superheater pipeline, unit m3。
S2: current time corresponding boiler carbonated drink side can survey operation data and coal amount director data in acquisition DCS system:
In thermal power unit boiler as shown in Figure 2-steam turbine structure schematic diagram, the surrounding of burner hearth primary combustion zone is by giving
Water-cooling wall surrounds in water evaporation system.When combustion position changes in furnace, effective (including vapo(u)rization system that recepts the caloric of vapo(u)rization system
Effective caloric receptivity of interior working medium and metal pipe-wall) it will directly be affected.Dynamic effects of the heat exchange for vapo(u)rization system in furnace
It can be described as the variation of drum pressure.According to vapo(u)rization system quality and law of conservation of energy, cigarette in the corresponding furnace of current time τ
Effective heat exchange amount of the gas to vapo(u)rization systemIt can be estimated and be acquired by following relational expression:
In formula,Unit be kJ/s；qs、hsRespectively drum outlet vapor flow and enthalpy, unit are respectively kg/s
And kJ/kg；hfwFor Enthalpy of Feed Water, unit kJ/kg；pdFor drum pressure, unit MPa；ρsw、Vsw、hswRespectively evaporation system
Density, volume and the enthalpy of water in uniting, unit is respectively kg/m3、m3And kJ/kg；cpw、mwtRespectively vapo(u)rization system tube metal
Specific heat capacity and gross mass, unit is respectively KJ/ (kg. DEG C) and kg；KdFor the regenerative capacity of vapo(u)rization system, unit kJ/
MPa。
It is arranged in the influence that the high temperature superheater of upper furnace also can directly by changed condition of burning in furnace, burning in furnace
Situation changes the influence for high temperature superheater, embodies a concentrated expression of in the dynamic change of main steam condition.Current time, τ was corresponding
Effective heat exchange amount of the flue gas in hyperthermia and superheating sectionIt can be expressed from the next:
In formula, msh,cpshTube metal quality and specific heat capacity respectively in high temperature superheater pipeline.htFor superheated steam
Enthalpy.qattFor the desuperheat spray flow of high temperature superheater entrance.hsh1For high temperature superheater inlet steam enthalpy.
It is arranged in the flue gas heat exchange amount of the equipment such as economizer and the low temperature superheater of burner hearth back-end ductwork, although also by burner hearth
The influence that combustion position changes, but since physical location is not in burner hearth primary combustion zone radiation scope, input/output terminal
The dynamic change of carbonated drink parameter is ignored.Thus, heat exchange amount of the corresponding flue gas of current time τ in this regionTable
It is shown as:
Operation data and set structure design parameter, convolution (2)~formula can be surveyed according to current time boiler carbonated drink side
(5), real-time estimation is carried out to effective caloric receptivity of current time τ corresponding boiler totality, calculation expression such as following formula:
S3: due to only including real-time coal amount command information in DCS system, lack the real-time measuring data of furnace coal weight.For
Real-time reflection Boiler Furnace chamber inner combustion economy, needs furnace coal weight q corresponding to current time τf(τ) is estimated in real time
It calculates.The step specifically includes:
31) unit pulverized-coal system puts into corresponding coal amount to feeder according to fuel command.Since fuel transmission process needs
The time is wanted, the dynamic process of pulverized coal preparation system delays link there are pure, it is expressed as follows:
In formula, rf,IFor the fuel command of tier I combustion zone, unit kg/s；For the practical coal for entering coal pulverizer I
Amount, unit kg/s；δ is delay time, unit s.
32) every coal pulverizer provides the as-fired coal powder amount met the requirements for one layer of burner.Coal pulverizer has certain storage
Coal amount, it is proportional that coal storage with it exports pulverized coal flow, and following first order inertial loop table can be used in its dynamic characteristic
Show:
In formula, qf,IFor the furnace coal weight of tier I combustion zone；kfFor coal pulverizer dynamic time constant.
33) total furnace coal weight q of the corresponding boiler of current time τf(τ) is the summation of each layer furnace coal weight, computational chart
It is as follows up to formula:
S4: the effective caloric receptivity burner hearth corresponding with furnace coal weight acquisition current time obtained according to step S2, step S3
Combustion economization index；
When combustion position changes in furnace, effective caloric receptivity of vapo(u)rization systemIt is arranged in the water-cooling wall in burner hearth
Effectively effective heat exchange amount of caloric receptivity and hyperthermia and superheating sectionIt will change correspondingly, especially be located near primary combustion zoneIt can most reflect the variation of combustion position in furnace in time.When in furnace combustion intensity increase when, water supply vapo(u)rization system receive with
Based on radiation energyAlso it can increase accordingly；Conversely, then reducing.The present invention is with effective caloric receptivity of water supply vapo(u)rization systemMake
For the state variable for reflecting combustion position in furnace real-time, quickly.It is corresponding in order to evaluate and test unit current time τ during varying duty
Hearth combustion economy, can be by effective caloric receptivity of the vapo(u)rization systemIt is converted to the unit of fuel amount as shown in formula (10)
Effective caloric receptivity, and using it as the hard measurement information of the corresponding hearth combustion economy of reflection current time τ.
S5: to fired power generating unit pulverizing process dynamic characteristic parameter off-line identification:
Estimate that the vapo(u)rization system of each sampled point effectively recepts the caloric by formula (2) and formula (3).In Present Thermal Power unit running process
In, total coal dust amount mean allocation in each coal pulverizer, and the dynamic characteristic of each powder manufacturing apparatus is consistent.Thus, with
The vapo(u)rization system of each sampled point estimation effectively recepts the caloric to export, and collected coal amount instruction operation data is input, under
Formula can recognize to obtain two dynamic characteristic parameters of pulverizing process.
It should be noted that, although effective caloric receptivity of vapo(u)rization system is non-linear relation with the total coal amount of furnace is entered, but its
Influence of the relational expression for pulverizing process dynamic characteristic is smaller.In order to simplify the identification process of powder dynamic time parameters processed,
Formula (11) assumes that the two is linear approximate relationship, proportionality coefficient kQ.Identification obtains the dynamic time constant k of coal pulverizerf=65
Second；Delay time δ is 25 seconds；Estimate effective caloric receptivity of obtained vapo(u)rization systemWith the approximately linear ratio for entering the total coal amount of furnace
Example coefficient kQFor 9x105kW/(kg/s)。
In order to which the pulverized coal preparation system dynamic performance model obtained to identification is verified, one group of 7000 seconds unit is resurveyed
Coal amount director data, and as mode input, it is quasi- that the model that vapo(u)rization system effectively recepts the caloric is calculated according to formula (11)
Close output valve.Using boiler carbonated drink side can survey the correspondence moment boiler evaporating system that operation data is estimated effectively recept the caloric as
Reality output.Under identical unit coal amount instruction input, contrast model fitting output and reality output.As shown in figure 3, model
Although fitting is exported and is not exclusively overlapped between reality output, the two dynamic change trend is consistent substantially.Therefore, should
Unit pulverizing process dynamic performance model has certain fitting precision.
It further illustrates, since the dynamic characteristic of pulverized coal preparation system is mainly determined by structure of system equipment, substantially not by unit
The influence of the method for operation.Therefore, in actual moving process, which does not need to readjust substantially, can
Given information as furnace coal weight real-time estimation.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
The staff for being familiar with the art in the technical scope disclosed by the present invention, can readily occur in various equivalent modifications or replace
It changes, these modifications or substitutions should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with right
It is required that protection scope subject to.
Claims (10)
1. a kind of furnace combustion state real-time online acquisition methods, which is characterized in that method includes the following steps:
1) requirement effectively to be recepted the caloric according to boiler steam and water circuit obtains current time corresponding boiler carbonated drink side in DCS system
Operation data and coal amount director data can be surveyed；
2) effective caloric receptivity of operation data estimation current time corresponding vapo(u)rization system can be surveyed according to the boiler carbonated drink side of acquisition
And effective caloric receptivity of boiler totality；
3) current time corresponding furnace coal weight is estimated according to the coal amount director data of acquisition, and obtained into the total coal amount of furnace；
4) vapo(u)rization system obtained according to step 2), step 3) effectively recepts the caloric and enters the total coal amount of furnace to obtain current time corresponding
Hearth combustion economic index；
5) off-line identification is carried out to the dynamic characteristic parameter of fired power generating unit pulverizing process.
2. a kind of furnace combustion state real-time online acquisition methods according to claim 1, which is characterized in that step 1)
In, boiler carbonated drink side can survey the drum outlet vapor flow that operation data is estimationIts expression formula are as follows:
In formula, τ is current time, and Δ τ is sampling period, qattFor desuperheat spray flow, pt、Tt、ρt、qtRespectively superheated steam
Pressure, temperature, density and flow, VshFor the volume in high temperature superheater pipeline.
3. a kind of furnace combustion state real-time online acquisition methods according to claim 2, which is characterized in that step 2)
In, effective caloric receptivity of boiler totalityCalculation expression are as follows:
In formula,For effective caloric receptivity of vapo(u)rization system,Furnace is being arranged in for the corresponding flue gas of current time τ
The heat exchange amount of thorax back-end ductwork equipment,Effective heat exchange amount for flue gas in hyperthermia and superheating section, htFor the enthalpy of superheated steam
Value, qattFor the desuperheat spray flow of high temperature superheater entrance, hfwFor Enthalpy of Feed Water, msh,cpshRespectively high temperature superheater pipeline
Interior tube metal quality and specific heat capacity, TtFor the temperature of superheated steam, pdFor drum pressure.
4. a kind of furnace combustion state real-time online acquisition methods according to claim 3, which is characterized in that vapo(u)rization system
Effective caloric receptivityEstimation formula are as follows:
Wherein,
In formula, KdFor the regenerative capacity of vapo(u)rization system, hsFor drum outlet vapor enthalpy, ρsw、Vsw、hswRespectively in vapo(u)rization system
Density, volume and the enthalpy of water, cpw、mwtThe respectively specific heat capacity and gross mass of vapo(u)rization system tube metal.
5. a kind of furnace combustion state real-time online acquisition methods according to claim 4, which is characterized in that flue gas is in height
Effective heat exchange amount of warm superheat sectionEstimation expression formula are as follows:
In formula, hsh1For high temperature superheater inlet steam enthalpy.
6. a kind of furnace combustion state real-time online acquisition methods according to claim 5, which is characterized in that current time
The corresponding flue gas of τ is in the heat exchange amount for being arranged in burner hearth back-end ductwork equipmentEstimation expression formula are as follows:
7. a kind of furnace combustion state real-time online acquisition methods according to claim 6, which is characterized in that step 3) tool
Body the following steps are included:
31) unit pulverized-coal system puts into corresponding coal amount to feeder according to fuel command, when being needed due to fuel transmission process
Between, the dynamic process of pulverized coal preparation system delays link there are pure, it is expressed as follows:
r′f,I(τ)=rf,I(τ-δ)
In formula, rf,IFor the fuel command of tier I combustion zone, r 'f,IFor the practical coal amount for entering coal pulverizer I, δ is when postponing
Between；
32) every coal pulverizer provides the as-fired coal powder amount met the requirements for one layer of burner, and the coal storage of coal pulverizer is exported with it
Pulverized coal flow is directly proportional, and the following first order inertial loop of its dynamic characteristic indicates:
In formula, qf,IFor the furnace coal weight of current time τ tier I combustion zone, kfFor coal pulverizer dynamic time constant；
33) the corresponding boiler of current time τ enters the total coal amount q of furnacef(τ) is the summation of each layer furnace coal weight, calculation expression
Are as follows:
qf(τ)=∑Iqf,I(τ)。
8. a kind of furnace combustion state real-time online acquisition methods according to claim 7, which is characterized in that step 4)
Particular content are as follows:
The effective caloric receptivity for the vapo(u)rization system that estimation is obtainedIt is converted to unit of fuel amount effectively to recept the caloric, and using it as instead
The hard measurement information for reflecting the corresponding hearth combustion economy of current time τ is converted to unit of fuel amount and effectively recepts the caloric's
Expression formula are as follows:
9. a kind of furnace combustion state real-time online acquisition methods according to claim 8, which is characterized in that step 5)
In, the expression formula of off-line identification is carried out to the dynamic characteristic parameter of fired power generating unit pulverizing process are as follows:
In formula, kQTo estimate effective caloric receptivity of obtained vapo(u)rization system and the proportionality coefficient for entering the total coal amount of furnace.
10. a kind of furnace combustion state real-time online acquisition methods according to claim 1, which is characterized in that thermal motor
The dynamic characteristic parameter of group pulverizing process includes inertia time and delay time.
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