CN109284581A - The method for analyzing boiler heating surface working medium flow and heat load distribution matching properties - Google Patents
The method for analyzing boiler heating surface working medium flow and heat load distribution matching properties Download PDFInfo
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Abstract
The invention discloses the methods of analysis boiler heating surface working medium flow and heat load distribution matching properties, calculate the matching attribute of heating surface cooling working medium flow and thermic load, are classified to mismatch situation；Calculate influence of each influence factor to matching attribute, it is classified according to influence degree, the mismatched degree of heating surface cooling working medium flow and thermic load is analyzed with this, diagnosis causes the cooling working medium flow of heating surface and the unmatched significant factors of thermic load, so that it is determined that administering boiler heating surface working medium flow and the unmatched sequence of heat load distribution.The present invention can be by analyzing the cooling working medium flow distribution of boiler heating surface with heat load distribution matching properties, it is diagnosed to be unmatched on heating surface and controllable significantly affects factor, controllable partly significantly affects factor, half controllable significantly affects factor, half it is controllable partly significantly affect factor, rapidly and accurately determine to the cooling working medium flow distribution of heating surface and the unmatched improvement order of heat load distribution.
Description
Technical field
The invention belongs to have the boiler heating surface of positive feedback characteristic and the matched analysis side of caloric receptivity, i.e. heat load distribution
Method, and in particular to the method for analysis boiler heating surface working medium flow and heat load distribution matching properties.
Background technique
The water-cooling wall of the superheater of boiler, reheater and direct current cooker has typical positive feedback characteristic, and heat exchanger tube heat is negative
Lotus is bigger, then heat transfer tube outlet Temperature of Working is higher, and working medium density is low to cause cooling working medium flow in pipe to reduce, and exports working medium temperature
Du Genggao.When design using control heat exchanger tube flow resistance coefficient come with the matched method of recepting the caloric come so that outlet Temperature of Working
It is almost the same, biggish difference is often shown in operation.At present to the more of outlet wall temperature distribution deviation analysis.But there is no shape
At the method statement heating surface working medium flow and matched degree of thermic load of system, also diagnosed without special method cause by
Hot face working medium flow and the unmatched reason of thermic load.
Boiler heating surface exports the biggish situation of wall temperature distribution deviation than more prominent, to boiler heating surface operational safety at present
It influences very big, such as causes that part heat exchange tube material aging is too fast, part heat transfer tube wall oxide scale growth is too fast and and base material
Bonding state is bad, water screen tube drawing crack and water screen tube large area transversal crack.The reason for causing wall temperature distribution deviation big
It is that cooling working medium flow and heat exchanger tube caloric receptivity mismatch in heat exchanger tube, causes unmatched because being known as: heat exchanger tube flow resistance
Coefficient distribution；The caloric receptivity deviation of different heat pipes；Inner flue gas of the stove temperature and flue gas flow are distributed, i.e. heat load distribution；It is heated
The coking of face surface and incrustation；Flue gas flow caused by boiler heat load changes and Temperature Distribution change；Radiation caused by thermic load
Heat exchange changes with heat convection ratio；The variation of furnace flame Temperature Distribution caused by boiler heat load changes；Coal pulverizer, which comes into operation, to be cut
The variation of furnace flame Temperature Distribution caused by changing；Import and export header static pressure distribution；The distribution of boiler circuit resistance coefficient is inclined with theory
Difference；Throttle orifice fouling etc..Statement to working medium flow and thermic load matching properties cooling in heating surface heat exchanger tube, there are also varying duties
Vapour fluctuating range and rate in the process, wall temperature fluctuate the enlarge-effect etc. compared with steam temperature.The variation of some of them factor is to be difficult to control
System, belong to uncontrollable factor；Some factors can change, and belong to controllable factor；Some factors, can portion by adjusting control
Divide and change, belongs to half controllable factor.
Summary of the invention
The technical problem to be solved by the present invention is to solve the above shortcomings of the prior art and to provide analysis boiler heating surface works
The method of mass flow amount and heat load distribution matching properties.
To realize the above-mentioned technical purpose, the technical scheme adopted by the invention is as follows:
The method for analyzing boiler heating surface working medium flow and heat load distribution matching properties calculates heating surface bosher mass flow
The matching attribute of amount and thermic load, is classified mismatch situation；Influence of each influence factor to matching attribute is calculated, according to
Influence degree is classified, and analyzes the mismatched degree of heating surface cooling working medium flow and thermic load with this, diagnosis cause by
The cooling working medium flow in hot face and the unmatched significant factors of thermic load, so that it is determined that administering boiler heating surface working medium flow and heat
The unmatched sequence of power load distributing, specifically includes the following steps:
Step 1: heating surface outlet wall temperature distribution under different operating conditions is tested；
Step 2: being distributed according to boiler operating parameter and wall temperature, and the working medium enthalpy for calculating each heat pipe rises distribution；
Step 3: statistics enthalpy rises distribution, calculates average enthalpy liter, Standard Enthalpies rise deviation, maximum enthalpy rises deviation, relative maximum enthalpy
Rise deviation；Abnormal enthalpy, which rises concentration degree, maximum enthalpy is transferred and promoted moves, abnormal enthalpy rises Distribution, transfer；
Calculate average enthalpy liter, Standard Enthalpies rise deviation, maximum enthalpy rises deviation, relative maximum enthalpy rises deviation；Abnormal enthalpy, which rises, to be concentrated
Degree, the formula that maximum enthalpy promotion moves, abnormal enthalpy rises Distribution, transfer are as follows:
Average enthalpy liter:
Standard Enthalpies rise deviation:
Enthalpy rises deviation, i.e. heat exchanger tube enthalpy rises the difference risen with average enthalpy: Δ Hij=Hij-HpkJ/kg (3)；
Maximum enthalpy rises deviation: Δ Hmax=maxHij-HpkJ/kg (4)；
Relative maximum enthalpy rises deviation, i.e., maximum enthalpy rises deviation and average enthalpy rises ratio: hmax=Hmax/Hp(5)；
Standard relative enthalpy rises deviation, i.e., heat exchanger tube enthalpy rises deviation and Standard Enthalpies rise bias ratio: hδ=Hp/δH(6)；
Maximum Standard Enthalpies rise deviation, i.e., maximum enthalpy rises deviation and Standard Enthalpies rise bias ratio: hδmax=Hmax/δH(7)；
Continuous abnormal enthalpy rises concentration degree γi: statistics heat exchanger tube Standard Enthalpies rise deviation and are greater than 3 times of δHPipe, midfeather do not surpass
The continuous abnormal that is considered as of two statistics points is crossed, continuous abnormal, which is counted, accounts for the percentage of statistical sample, and referred to as continuous abnormal enthalpy rises collection
Moderate, formula are as follows: γi=100 × ∑ Cont (h δ Max > 3)/N% (8)；
Maximum enthalpy, which is transferred and promoted, moves τkn: at operating condition k and under operating condition n, the statistics points of maximum enthalpy riser position migration account for statistics
The percentage of sample number is known as maximum enthalpy promotion and moves, formula are as follows: τkn=100 × (S (Hmax)k-S(Hmax)n)/N% (9)；
Wherein, S (Hmax)kEnthalpy rises maximum water screen tube location point when to number the operating condition for being k；
Abnormal Han Sheng dot center position Cen, i.e. Cont (hδMax > 3) it is the symmetrical center positions that continuous abnormal enthalpy rises distribution
Point；
Abnormal enthalpy rises Distribution, transfer τ γink: count continuously distributed abnormal Han Sheng dot center position, at operating condition k with work
Under condition n, the statistics points of center position migration account for the percentage of statistical sample number, and referred to as abnormal enthalpy rises Distribution, transfer, formula
Are as follows: τγkn=100 × (Cenk(Cont(hδmax>3))-Cenn(Cont(hδMax > 3)))/N% (10).
Step 4: using the statistical analysis technique of weighted factor, of heating surface cooling working medium flow and thermic load is calculated
With the factor；Matching attribute is the matching of heating surface cooling working medium flow and thermic load, is risen and is distributed to state using heat exchanger tube enthalpy,
It is denoted as ξ；Matching attribute can be divided into either simplex condition matching attribute and multi-state matching attribute, the multi-state matching attribute ξht k,nIt is flat
Equal enthalpy liter, Standard Enthalpies rise deviation, maximum enthalpy rises deviation, relative maximum enthalpy rises deviation, standard maximum enthalpy rises deviation, abnormal enthalpy rises collection
Moderate, maximum enthalpy be transferred and promoted move, abnormal enthalpy rises the function of Distribution, transfer, calculated using the method for weighted statistical；The either simplex
Condition matching attribute ξkOnly consider the matching properties under single operating condition, is average enthalpy liter, Standard Enthalpies rise deviation, maximum enthalpy rises partially
Poor, relative maximum enthalpy rises deviation, standard maximum enthalpy rises deviation, abnormal enthalpy rises the function of concentration degree, equally using weighted statistical
Method is calculated, and specific formula for calculation is as follows:
ξht k=f1(Hp,δH,Hmax,hmax,hδmax,γi)
=α1×Hp+α2×δH+α3×Hmax+α4×hmax+α5×hδmax+α6×γi(11)；
ξht k,n=f2(Hp,δH,Hmax,hmax,hδmax,γi,τkn,τγkn)=β1×(Hp-Hp)+β2×(δk H-δn H)+β3×(Hk max-
Hn max)+β4×(hk max-hn max)+β5×(hk δmax-hn δmax)+β6×(γk i-γn i)+β7×τkn+β8×τγkn(12),
In formula, α1、α2、α3、α4、α5、α6、β1、β2、β3、β4、β5、β6、β7And β8It is weighting coefficient.
Step 5: divided according to matching properties of the matching attribute of calculating to the cooling working medium flow of heating surface and thermic load
Grade；Stage division are as follows: given matches criteria factor ξ01、ξ02, as calculated heating surface matching attribute ξht>ξ01When, for significantly not
Matching；Work as ξ02>ξht>ξ01When, for half significant mismatch；Work as ξht<ξ02When, for matching.
Step 6: the factor that will affect the matching properties of the cooling working medium flow of heating surface and thermic load is classified；Specifically, shadow
Ring cooling working medium flow distribution because being known as: heat exchanger tube flow resistance coefficient, throttle orifice aperture, import header static pressure distribution, out
Mouth header static pressure distribution, boiler output, foreign matters from being blocked situation；Influence heat load distribution because being known as: boiler output, burner hearth knot
Coke, fouling of heating surface, coal pulverizer come into operation, First air uniformity, secondary air register adjust, coal-fired coal quality；The classification results are as follows: non-
Controllable factor has: heat exchanger tube flow resistance coefficient, import header static pressure distribution, outlet header static pressure distribution, coal-fired coal quality；Controllably
Because being known as: coal pulverizer comes into operation, throttle orifice aperture；Remaining factor is half controllable factor.
Step 7: calculating factor influences the matching attribute of the cooling working medium flow of heating surface and thermic load, to the shadow of factor
The degree of sound is classified；Stage division is carried out to the influence degree of factor are as follows: the different condition calculatings changed by influence factor
The matching attribute ξ of the heating surface of controllable factor and half controllable factor cooling working medium flow and thermic load outht k,n, with matches criteria because
Sub- ξef01、ξef02Compare, the influence to factor to matching attribute is classified, ξht k,n>ξef01When, to significantly affect factor；When
ξef02>ξht k,n>ξef01When, partly to significantly affect factor；Work as ξht k,n<ξef02When, it is non-significant influence factor.
Step 8: influence factor is classified；According to the controllable characteristics of influence factor, and the influence to matching attribute
Degree, the factor of will affect are divided into: it is controllable to significantly affect factor, half it is controllable significantly affect factor, non-controllable significantly affects
Factor；It is controllable partly to significantly affect factor, half it is controllable partly significantly affect factor, non-controllable partly significantly affects factor；It is non-aobvious
Write influence factor.
Step 9: boiler heating surface working medium flow and heat load distribution mismatch administered by it is controllable significantly affect because
Element, it is controllable partly to significantly affect factor, half it is controllable significantly affect factor, half it is controllable partly significantly affect factor progress, remaining
Factor does not consider to administer.
The invention has the following advantages:
The present invention can be by analyzing the cooling working medium flow distribution of boiler heating surface with heat load distribution matching properties, diagnosis
Out it is unmatched on heating surface it is controllable significantly affect factor, it is controllable partly to significantly affect factor, half it is controllable significantly affect because
Element, half it is controllable partly significantly affect factor, determine to the cooling working medium flow distribution of heating surface with heat load distribution is unmatched controls
Order is managed, method is simple and effective, and accuracy rate is high.
Specific embodiment
Below in conjunction with specific embodiment, present invention is further described in detail.
Integral Thought of the invention is as follows: the matching attribute of heating surface cooling working medium flow and thermic load is calculated, to not
It is classified with situation；Influence of each influence factor to matching attribute is calculated, is classified according to size is influenced.It is analyzed with this
The mismatched degree of heating surface cooling working medium flow and thermic load, diagnosis do not cause the cooling working medium flow of heating surface and thermic load not
The significant factors matched.
In embodiment, the water wall of monotube boiler to lower radiation using vertical water wall is realized using method of the invention
Cooling working medium flow and furnace load matching properties are analyzed, specifically includes the following steps:
Step 1: heating surface outlet wall temperature distribution under different operating conditions is tested；
Step 2: being distributed according to boiler operating parameter and wall temperature, and the working medium enthalpy for calculating each heat pipe rises distribution；
Step 3: statistics enthalpy rises distribution, calculates average enthalpy liter, Standard Enthalpies rise deviation, maximum enthalpy rises deviation, relative maximum enthalpy
Rise deviation；Abnormal enthalpy, which rises concentration degree, maximum enthalpy is transferred and promoted moves, abnormal enthalpy rises Distribution, transfer；
Calculate average enthalpy liter, Standard Enthalpies rise deviation, maximum enthalpy rises deviation, relative maximum enthalpy rises deviation；Abnormal enthalpy, which rises, to be concentrated
Degree, the formula that maximum enthalpy promotion moves, abnormal enthalpy rises Distribution, transfer are as follows:
Average enthalpy liter:
Standard Enthalpies rise deviation:
Enthalpy rises deviation, i.e. heat exchanger tube enthalpy rises the difference risen with average enthalpy: Δ Hij=Hij-HpkJ/kg (3)；
Maximum enthalpy rises deviation: Δ Hmax=maxHij-HpkJ/kg (4)；
Relative maximum enthalpy rises deviation, i.e., maximum enthalpy rises deviation and average enthalpy rises ratio: hmax=Hmax/Hp(5)；
Standard relative enthalpy rises deviation, i.e., heat exchanger tube enthalpy rises deviation and Standard Enthalpies rise bias ratio: hδ=Hp/δH(6)；
Maximum Standard Enthalpies rise deviation, i.e., maximum enthalpy rises deviation and Standard Enthalpies rise bias ratio: hδmax=Hmax/δH(7)；
Continuous abnormal enthalpy rises concentration degree γi: statistics heat exchanger tube Standard Enthalpies rise deviation and are greater than 3 times of δHPipe, midfeather do not surpass
The continuous abnormal that is considered as of two statistics points is crossed, continuous abnormal, which is counted, accounts for the percentage of statistical sample, and referred to as continuous abnormal enthalpy rises collection
Moderate, formula are as follows: γi=100 × ∑ Cont (h δ Max > 3)/N% (8)；
Maximum enthalpy, which is transferred and promoted, moves τkn: at operating condition k and under operating condition n, the statistics points of maximum enthalpy riser position migration account for statistics
The percentage of sample number is known as maximum enthalpy promotion and moves, formula are as follows: τkn=100 × (S (Hmax)k-S(Hmax)n)/N% (9)；
Wherein, S (Hmax)kEnthalpy rises maximum water screen tube location point when to number the operating condition for being k；
Abnormal Han Sheng dot center position Cen, i.e. Cont (hδMax > 3) it is the symmetrical center positions that continuous abnormal enthalpy rises distribution
Point；
Abnormal enthalpy rises Distribution, transfer τ γink: count continuously distributed abnormal Han Sheng dot center position, at operating condition k with work
Under condition n, the statistics points of center position migration account for the percentage of statistical sample number, and referred to as abnormal enthalpy rises Distribution, transfer, formula
Are as follows: τγkn=100 × (Cenk(Cont(hδmax>3))-Cenn(Cont(hδMax > 3)))/N% (10).
Step 4: using the statistical analysis technique of weighted factor, of heating surface cooling working medium flow and thermic load is calculated
With the factor；Matching attribute is the matching of heating surface cooling working medium flow and thermic load, is risen and is distributed to state using heat exchanger tube enthalpy,
It is denoted as ξ；Matching attribute can be divided into either simplex condition matching attribute and multi-state matching attribute, the multi-state matching attribute ξht k,nIt is flat
Equal enthalpy liter, Standard Enthalpies rise deviation, maximum enthalpy rises deviation, relative maximum enthalpy rises deviation, standard maximum enthalpy rises deviation, abnormal enthalpy rises collection
Moderate, maximum enthalpy be transferred and promoted move, abnormal enthalpy rises the function of Distribution, transfer, calculated using the method for weighted statistical；The either simplex
Condition matching attribute ξkOnly consider the matching properties under single operating condition, is average enthalpy liter, Standard Enthalpies rise deviation, maximum enthalpy rises partially
Poor, relative maximum enthalpy rises deviation, standard maximum enthalpy rises deviation, abnormal enthalpy rises the function of concentration degree, equally using weighted statistical
Method is calculated, and specific formula for calculation is as follows:
ξht k=f1(Hp,δH,Hmax,hmax,hδmax,γi)
=α1×Hp+α2×δH+α3×Hmax+α4×hmax+α5×hδmax+α6×γi(11)；
ξht k,n=f2(Hp,δH,Hmax,hmax,hδmax,γi,τkn,τγkn)=β1×(Hp-Hp)+β2×(δk H-δn H)+β3×(Hk max-
Hn max)+β4×(hk max-hn max)+β5×(hk δmax-hn δmax)+β6×(γk i-γn i)+β7×τkn+β8×τγkn(12),
In formula, α1、α2、α3、α4、α5、α6、β1、β2、β3、β4、β5、β6、β7And β8It is weighting coefficient.
Step 5: divided according to matching properties of the matching attribute of calculating to the cooling working medium flow of heating surface and thermic load
Grade；Stage division are as follows: given matches criteria factor ξ01、ξ02, as calculated heating surface matching attribute ξht>ξ01When, for significantly not
Matching；Work as ξ02>ξht>ξ01When, for half significant mismatch；Work as ξht<ξ02When, for matching.
Step 6: the factor that will affect the matching properties of the cooling working medium flow of heating surface and thermic load is classified；Specifically, shadow
Ring cooling working medium flow distribution because being known as: heat exchanger tube flow resistance coefficient, throttle orifice aperture, import header static pressure distribution, out
Mouth header static pressure distribution, boiler output, foreign matters from being blocked situation；Influence heat load distribution because being known as: boiler output, burner hearth knot
Coke, fouling of heating surface, coal pulverizer come into operation, First air uniformity, secondary air register adjust, coal-fired coal quality；The classification results are as follows: non-
Controllable factor has: heat exchanger tube flow resistance coefficient, import header static pressure distribution, outlet header static pressure distribution, coal-fired coal quality；Controllably
Because being known as: coal pulverizer comes into operation, throttle orifice aperture；Remaining factor is half controllable factor.
Step 7: calculating factor influences the matching attribute of the cooling working medium flow of heating surface and thermic load, to the shadow of factor
The degree of sound is classified；Stage division is carried out to the influence degree of factor are as follows: the different condition calculatings changed by influence factor
The matching attribute ξ of the heating surface of controllable factor and half controllable factor cooling working medium flow and thermic load outht k,n, with matches criteria because
Sub- ξef01、ξef02Compare, the influence to factor to matching attribute is classified, ξht k,n>ξef01When, to significantly affect factor；When
ξef02>ξht k,n>ξef01When, partly to significantly affect factor；Work as ξht k,n<ξef02When, it is non-significant influence factor.
Step 8: influence factor is classified；According to the controllable characteristics of influence factor, and the influence to matching attribute
Degree, the factor of will affect are divided into: it is controllable to significantly affect factor, half it is controllable significantly affect factor, non-controllable significantly affects
Factor；It is controllable partly to significantly affect factor, half it is controllable partly significantly affect factor, non-controllable partly significantly affects factor；It is non-aobvious
Write influence factor.
Step 9: boiler heating surface working medium flow and heat load distribution mismatch administered by it is controllable significantly affect because
Element, it is controllable partly to significantly affect factor, half it is controllable significantly affect factor, half it is controllable partly significantly affect factor progress, remaining
Factor does not consider to administer.
The above is only the preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-described embodiment,
All technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art
For those of ordinary skill, several improvements and modifications without departing from the principles of the present invention should be regarded as protection of the invention
Range.
Claims (7)
1. the method for analyzing boiler heating surface working medium flow and heat load distribution matching properties, it is characterised in that: calculate heating surface
The matching attribute of cooling working medium flow and thermic load, is classified mismatch situation；Each influence factor is calculated to matching attribute
Influence, be classified according to influence degree, the mismatched degree of heating surface cooling working medium flow and thermic load analyzed with this,
Diagnosis causes the cooling working medium flow of heating surface and the unmatched significant factors of thermic load, so that it is determined that administering boiler heating surface work
Mass flow amount and the unmatched sequence of heat load distribution, specifically includes the following steps:
Step 1: heating surface outlet wall temperature distribution under different operating conditions is tested；
Step 2: being distributed according to boiler operating parameter and wall temperature, and the working medium enthalpy for calculating each heat pipe rises distribution；
Step 3: statistics enthalpy rises distribution, and the average enthalpy liter of calculating, Standard Enthalpies rise deviation, maximum enthalpy rises deviation, relative maximum enthalpy liter is inclined
Difference；Abnormal enthalpy, which rises concentration degree, maximum enthalpy is transferred and promoted moves, abnormal enthalpy rises Distribution, transfer；
Step 4: using the statistical analysis technique of weighted factor, calculate the matching of the cooling working medium flow of heating surface and thermic load because
Son；Step 5: it is classified according to matching properties of the matching attribute of calculating to the cooling working medium flow of heating surface and thermic load；
Step 6: the factor that will affect the matching properties of the cooling working medium flow of heating surface and thermic load is classified；
Step 7: calculating factor influences the matching attribute of the cooling working medium flow of heating surface and thermic load, the influence journey to factor
Degree is classified；
Step 8: influence factor is classified；
Step 9: boiler heating surface working medium flow and heat load distribution mismatch are administered and significantly affect factor by controllable,
It is controllable partly to significantly affect factor, half it is controllable significantly affect factor, half controllable partly significantly affects factor progress, remaining factor
Do not consider to administer.
2. the method for analysis boiler heating surface working medium flow and heat load distribution matching properties according to claim 1,
Be characterized in that: the average enthalpy liter of calculating described in step 3, Standard Enthalpies rise deviation, maximum enthalpy rises deviation, relative maximum enthalpy rises deviation；It is different
The formula that normal enthalpy, which rises concentration degree, maximum enthalpy is transferred and promoted moves, abnormal enthalpy rises Distribution, transfer is as follows:
Average enthalpy liter:
Standard Enthalpies rise deviation:
Enthalpy rises deviation, i.e. heat exchanger tube enthalpy rises the difference risen with average enthalpy: Δ Hij=Hij-HpkJ/kg (3)；
Maximum enthalpy rises deviation: Δ Hmax=maxHij-HpkJ/kg (4)；
Relative maximum enthalpy rises deviation, i.e., maximum enthalpy rises deviation and average enthalpy rises ratio: hmax=Hmax/Hp(5)；
Standard relative enthalpy rises deviation, i.e., heat exchanger tube enthalpy rises deviation and Standard Enthalpies rise bias ratio: hδ=Hp/δH(6)；
Maximum Standard Enthalpies rise deviation, i.e., maximum enthalpy rises deviation and Standard Enthalpies rise bias ratio: hδmax=Hmax/δH(7)；
Continuous abnormal enthalpy rises concentration degree γi: statistics heat exchanger tube Standard Enthalpies rise deviation and are greater than 3 times of δHPipe, midfeather be no more than two
A statistics point is considered as continuous abnormal, and continuous abnormal, which is counted, accounts for the percentage of statistical sample, and referred to as continuous abnormal enthalpy rises concentration degree,
Formula are as follows: γi=100 × ∑ Cont (h δ Max > 3)/N% (8)；
Maximum enthalpy, which is transferred and promoted, moves τkn: at operating condition k and under operating condition n, the statistics points of maximum enthalpy riser position migration account for statistical sample
Several percentage is known as maximum enthalpy promotion and moves, formula are as follows: τkn=100 × (S (Hmax)k-S(Hmax)n)/N% (9)；
Wherein, S (Hmax)kEnthalpy rises maximum water screen tube location point when to number the operating condition for being k；
Abnormal Han Sheng dot center position Cen, i.e. Cont (hδMax > 3) it is the symmetrical center positions point that continuous abnormal enthalpy rises distribution；
Abnormal enthalpy rises Distribution, transfer τ γink: count continuously distributed abnormal Han Sheng dot center position, at operating condition k with operating condition n
Under, the statistics points of center position migration account for the percentage of statistical sample number, and referred to as abnormal enthalpy rises Distribution, transfer, formula are as follows:
τγkn=100 × (Cenk(Cont(hδmax>3))-Cenn(Cont(hδMax > 3)))/N% (10).
3. the method for analysis boiler heating surface working medium flow and heat load distribution matching properties according to claim 2,
Be characterized in that: matching attribute described in step 4 is the matching of heating surface cooling working medium flow and thermic load, utilizes heat exchanger tube enthalpy
Distribution is risen to state, is denoted as ξ；Matching attribute can be divided into either simplex condition matching attribute and multi-state matching attribute, the multi-state
With factor ξht k,nIt is average enthalpy liter, Standard Enthalpies rise deviation, maximum enthalpy rises deviation, relative maximum enthalpy rises deviation, standard maximum enthalpy liter
Deviation, abnormal enthalpy, which rise concentration degree, maximum enthalpy is transferred and promoted moves, abnormal enthalpy rises the function of Distribution, transfer, using weighted statistical method into
Row calculates；The either simplex condition matching attribute ξkOnly consider the matching properties under single operating condition, is average enthalpy liter, Standard Enthalpies liter
Deviation, maximum enthalpy rise deviation, relative maximum enthalpy rises deviation, standard maximum enthalpy rises deviation, abnormal enthalpy rises the function of concentration degree, equally
It is calculated using the method for weighted statistical, specific formula for calculation is as follows:
ξht k=f1(Hp,δH,Hmax,hmax,hδmax,γi)
=α1×Hp+α2×δH+α3×Hmax+α4×hmax+α5×hδmax+α6×γi(11)；
ξht k,n=f2(Hp,δH,Hmax,hmax,hδmax,γi,τkn,τγkn)=β1×(Hp-Hp)+β2×(δk H-δn H)+β3×(Hk max-
Hn max)+β4×(hk max-hn max)+β5×(hk δmax-hn δmax)+β6×(γk i-γn i)+β7×τkn+β8×τγkn(12)；
In formula, α1、α2、α3、α4、α5、α6、β1、β2、β3、β4、β5、β6、β7And β8It is weighting coefficient.
4. the method for analysis boiler heating surface working medium flow and heat load distribution matching properties according to claim 3,
It is characterized in that: stage division described in step 5 are as follows: given matches criteria factor ξ01、ξ02, when calculated heating surface matching attribute
ξht>ξ01When, it is mismatched to be significant；Work as ξ02>ξht>ξ01When, for half significant mismatch；Work as ξht<ξ02When, for matching.
5. the method for analysis boiler heating surface working medium flow and heat load distribution matching properties according to claim 4,
Be characterized in that: the factor of the cooling working medium flow of influence heating surface and the matching properties of thermic load described in step 6 is divided into influence cooling
Working medium flow distribution factor influences heat load distribution factor, specifically, influence cooling working medium flow distribution because being known as: exchange heat
Pipe flow resistance coefficient, throttle orifice aperture, import header static pressure distribution, outlet header static pressure distribution, boiler output, foreign matters from being blocked
Situation；Influence heat load distribution because being known as: boiler output, burner hearth coking, fouling of heating surface, coal pulverizer come into operation, First air is equal
Even property, secondary air register adjustment, coal-fired coal quality；The classification results are as follows: noncontrollable factors have: heat exchanger tube flow resistance coefficient, into
Mouth header static pressure distribution, outlet header static pressure distribution, coal-fired coal quality；Controllable factor has: coal pulverizer comes into operation, throttle orifice aperture；Its
Remaining factor is half controllable factor.
6. the method for analysis boiler heating surface working medium flow and heat load distribution matching properties according to claim 5,
It is characterized in that: stage division being carried out to the influence degree of factor described in step 7 are as follows: the different operating conditions changed by influence factor
Calculate the matching attribute ξ of the heating surface cooling working medium flow and thermic load of controllable factor and half controllable factorht k,n, with standard
With factor ξef01、ξef02Compare, the influence to factor to matching attribute is classified, ξht k,n>ξef01When, to significantly affect factor；
Work as ξef02>ξht k,n>ξef01When, partly to significantly affect factor；Work as ξht k,n<ξef02When, it is non-significant influence factor.
7. the side of -6 any analysis the boiler heating surface working medium flows and heat load distribution matching properties according to claim 1
Method, it is characterised in that: the method being classified described in step 8 to influence factor is as follows: according to the controllable characteristics of influence factor,
And the influence degree to matching attribute, the factor of will affect are divided into: it is controllable to significantly affect factor, half it is controllable significantly affect because
Element, non-controllable significantly affects factor；It is controllable partly to significantly affect factor, half it is controllable partly significantly affect factor, it is non-controllable
Partly significantly affect factor；Non-significant influence factor.
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