CN105091932B - A kind of three points of storehouses rotary preheater segmentation dust stratification monitoring method - Google Patents
A kind of three points of storehouses rotary preheater segmentation dust stratification monitoring method Download PDFInfo
- Publication number
- CN105091932B CN105091932B CN201510482303.6A CN201510482303A CN105091932B CN 105091932 B CN105091932 B CN 105091932B CN 201510482303 A CN201510482303 A CN 201510482303A CN 105091932 B CN105091932 B CN 105091932B
- Authority
- CN
- China
- Prior art keywords
- mrow
- air
- msub
- hot arc
- cold section
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000000428 dust Substances 0.000 title claims abstract description 29
- 238000013517 stratification Methods 0.000 title claims abstract description 29
- 238000012544 monitoring process Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000011218 segmentation Effects 0.000 title claims abstract description 21
- 238000012546 transfer Methods 0.000 claims abstract description 48
- 239000003245 coal Substances 0.000 claims abstract description 21
- 238000004140 cleaning Methods 0.000 claims abstract description 20
- 108090000623 proteins and genes Proteins 0.000 claims abstract description 15
- 238000004364 calculation method Methods 0.000 claims abstract description 10
- 230000008021 deposition Effects 0.000 claims abstract description 5
- 238000009825 accumulation Methods 0.000 claims description 94
- 239000003546 flue gas Substances 0.000 claims description 89
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 88
- 230000008676 import Effects 0.000 claims description 65
- 239000007789 gas Substances 0.000 claims description 24
- 238000010438 heat treatment Methods 0.000 claims description 24
- 235000019504 cigarettes Nutrition 0.000 claims description 23
- 239000003517 fume Substances 0.000 claims description 23
- 239000000463 material Substances 0.000 claims description 9
- 239000000779 smoke Substances 0.000 claims description 7
- 238000012937 correction Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 239000004071 soot Substances 0.000 abstract description 23
- 238000007664 blowing Methods 0.000 abstract description 13
- 230000000007 visual effect Effects 0.000 abstract description 3
- 230000007547 defect Effects 0.000 abstract 1
- 230000008569 process Effects 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 4
- 238000013480 data collection Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 208000011580 syndromic disease Diseases 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Landscapes
- Air Supply (AREA)
Abstract
The invention discloses a kind of three points of storehouses rotary preheater segmentation dust stratification monitoring method, mainly include data acquisition module, computing module and output module, data collecting module collected as-fired coal matter parameter, structural parameters and boiler real time execution parameter, segmentation cleaning gene is carried out by well-established preheater ash deposition monitoring model to calculate, preheater is segmented the real time cleaning factor and exported with real-time parameter curve form by last output module.Shortcoming and defect of the present invention for the overall dust stratification monitoring method of existing power plant's preheater, propose the thought of segmentation dust stratification monitoring, and establish segmentation dust stratification monitoring calculation model, preheater dust stratification visual data can be provided, operations staff can be helped to judge appropriate soot blower occasion, segmentation soot blowing is carried out, so as to reduce soot blower steam loss and improve preheater heat transfer efficiency.
Description
Technical field
The invention belongs to collecting ash monitoring technical field, more particularly to a kind of three points of storehouses rotary preheater segmentation dust stratification
Monitoring method.
Background technology
At present, more than large-scale power station coal-burning boiler using three points of storehouse rotary preheater recovered flue gas heats come preheated air,
So as to overheavy firing, reduction exhaust gas temperature and raising boiler efficiency.Three points of storehouse rotary preheater heat transfer elements are by closely arranging
Heat accumulation plate constitute, due to its compact conformation and working medium passage is narrow, therefore easily dust stratification, or even block working medium passage, cause
The increase of cigarette air flow resistance, heat transfer efficiency reduction, so that the normal work of preheater is influenceed, therefore must often soot blowing cleaning.
The heat transfer element of three points of storehouse rotary preheaters according to material difference be divided into hot arc (including hot arc layer 1 and hot arc in
Interbed 2) and cold section (including cold section of layer 3).Comparatively speaking, cold segment element specific heat segment element is more easy to dust stratification, and power plant is strong now
Change soot blowing effect and be all disposed with steam sootblower (as shown in Figure 2), the hot arc soot blowing of upper end in hot cold end (upper and lower side)
Device 4, the cold end soot blower 5 of lower end, sectional soot blowing.But power plant operations staff sentences generally according to smoke entrance magnitude of pressure differential
The dust stratification degree of disconnected preheater, the method can only judge the overall dust stratification situation of preheater roughly, it is impossible to carry out sectional monitoring, so that
Can only cause by rule of thumb soot blowing frequently and steam loss is excessive, or cause soot blowing not in time and preheater heat transfer efficiency reduce.Cause
This, the preheater segmentation ash deposition monitoring model for setting up satisfaction requirement seems most important.
The content of the invention
The present invention provides a kind of three points of storehouses rotary preheater segmentation dust stratification monitoring method in view of the shortcomings of the prior art,：
The visual data that preheater is segmented dust stratification degree is provided, to help operations staff to judge cold and hot section of appropriate soot blower occasion, carried out
Soot blowing is segmented, so as to reduce soot blower steam loss and improve preheater heat transfer efficiency.
The present invention is to adopt the following technical scheme that：
A kind of three points of storehouses rotary preheater segmentation dust stratification monitoring method, the inventive method is divided into three modules：Data are adopted
Collect module, computing module and output module.Wherein data acquisition module is mainly collection as-fired coal prime number evidence, preheater structure ginseng
Number and preheater real-time running data.Computing module define can characterize the usage factor of preheater clean-up performance for cleaning because
Son, carries out thermodynamic computing to obtain segmentation cleaning gene according to the data gathered to preheater.Last output module will be cleaned
The factor, which is distributed in time making curve map, is presented to operations staff, so as to provide foundation for segmentation soot blowing.
Data acquisition module includes adopting for as-fired coal prime number evidence, preheater structural parameters and preheater real-time running data
Collection.Wherein as-fired coal prime number also needs to the proportioning of different coal samples according to being obtained by coal analysis if burning coal sample is blending coal.
Preheater structural parameters are obtained by preheater product description, it is necessary to accumulation of heat plate material, heat accumulation plate quality, heat accumulation plate length
(evening up), heat accumulation plate heating surface area, flue gas circulation area, First air circulation area, Secondary Air circulation area, cold section of ratio of heat,
Flue gas and ventilation area account for total circulation area share.Real-time running data is gathered by Power Plant DCS System, main measuring point bag
Include：Preheater rotor speed, boiler fired coal amount, boiler efficiency, smoke entrance temperature, First air out temperature, Secondary Air
Out temperature, First air inlet flow rate and Secondary Air import and export flow, and (above-mentioned measuring point is indispensable, and survey should be increased as power plant lacks
Point).
The usage factor that computing module defines preheater is cleaning gene, and usage factor is more big, shows that preheater is more clear
Clean, usage factor is smaller, and showing that preheater dust stratification needs to carry out soot blowing.Therefore, it is defined as the preheater profit of cleaning gene
Characterize dust stratification degree indirectly with coefficient, hot, cold section of usage factor need to be calculated by carrying out segmentation dust stratification monitoring, and calculating process is such as
Under：
Calculate assumed condition：
(a) three points of storehouse rotary preheater Calculation of Heat Transfer use convection heat transfer' heat-transfer by convection model, i.e., whole flue gases are with convection heat transfer' heat-transfer by convection side
Formula transfers heat to air, and flue gas and air flow in countercurrent direction；
(b) it is identical when the air mass flow share that heat, cooling sectional are calculated is with overall calculation for the air channel of air side first and second；
(c) fume side leaks into air all from first and second air channel.Cold, the section air leakage coefficient of heat is different, and specifically by heat
Balance is determined；
Calculation procedure
Step 1：According to the overall thermal balance of preheater, the average excess air coefficient of air side is calculated, fume side, which is always leaked out, is
Number：
(1) fume side thermal discharge：
(2) First air absorbs heat：
Secondary Air absorbs heat：
Integrated air recepts the caloric：Wherein
g2=1-g1
(3) the average excess air coefficient of air side is calculated according to actual measurement preheater Secondary Air average discharge：
Wherein
(4) according to thermal balance Qy=Qk, formula (1) and (2) in this step of simultaneous calculate the total air leakage coefficient Δ α of fume side；
Wherein, QyFor overall flue gas thermal discharge；QkRecepted the caloric for integrated air；Qk1Recepted the caloric for one piece wind；Qk2For
Overall Secondary Air caloric receptivity；Iy′、Iy" it is respectively flue gas import and export enthalpy；Ik1′、Ik1" it is respectively that First air imports and exports air enthalpy；
Ik2′、Ik2" it is respectively that Secondary Air imports and exports air enthalpy；(added for the average enthalpy of air side import and export by a secondary air duct
Power)；D1' it is First air inlet flow rate；D2′,、D2" it is Secondary Air import and export flow；V0For theoretical air volume；Protected for boiler
Hot coefficient, takes 0.998；g1、g2Respectively first and second wind flow accounts for the share of total air mass flow；It is averagely excessive for air side
Coefficient；Δ α is the lateral fume side air leakage coefficient of air；ρkFor atmospheric density；BjTo calculate Coal-fired capacity.
Step 2：Assuming that hot arc outlet cigarette temperature θm(i.e. cold section import cigarette temperature), lists hot, cold section of equation of heat balance, calculates
Hot, cold section of air leakage coefficient Δ αh,、Δαc, and hot arc inlet air mean temperature tk,m(i.e. cold section outlet air mean temperature)：
(1) hot arc equation of heat balance is set up：
(2) cold section of equation of heat balance is set up：
(3) according to flue gas enthalpy temperature table, by assumption value θmUtilize interpolation calculation Iy,m；
(4) (1) and (2) in this step of simultaneous and condition Δ αh+Δαc=Δ α, calculates hot, cold section of air leakage coefficient
Δαh,ΔαcWith the average enthalpy of hot arc inlet air(the average enthalpy of cold section of outlet air)；
(5) according to air enthalpy temperature table, byT is obtained using interpolation methodk,m；(wherein flue gas and air enthalpy temperature table passes through coal
Matter analysis is obtained, and this is thermodynamic computing general knowledge, is repeated no more)
Wherein, θmFor hot arc exit gas temperature (i.e. cold section import cigarette temperature)；Iy,mFor (i.e. cold section of hot arc exiting flue gas enthalpy
Import cigarette enthalpy), tk,mFor hot arc inlet air mean temperature (i.e. cold section outlet air mean temperature)；Hot arc inlet air
Average enthalpy (the average enthalpy of i.e. cold section outlet air)；Δαh、ΔαcRespectively hot, the cold section of lateral fume side air leakage coefficient of air.
Step 3：Assuming that air temperature t of hot arc importk1,m(the air temperature in i.e. cold section outlet), calculates hot, cold respectively
Section flue gas, First air and Secondary Air are to the exothermic coefficient of heat accumulation plate, then calculate hot, cold section of heating surface usage factor：
(1) air temperature t of hot arc import is assumedk1,m, according to tk,m=g1tk1,m+g2tk2,mObtain hot arc import Secondary Air
Temperature tk2,m；
(2) hot, cold section of flue gas mean temperature：
Hot, cold section of First air mean temperature：
Hot, cold section of Secondary Air mean temperature：
(3) hot arc mean temperature difference：
Cold section of mean temperature difference：
(1) hot arc heat transfer coefficient：
Cold section of heat transfer coefficient：
(2) hot arc flue gas flow rate：
Cold section of flue gas flow rate：
Hot arc First air flow velocity：
Cold section of First air flow velocity：
Hot arc Secondary Air flow velocity：
Cold section of Secondary Air flow velocity：(wherein )
(3) hot arc fume side coefficient of convective heat transfer：
Cold section of fume side coefficient of convective heat transfer：
Hot arc First air side coefficient of convective heat transfer：
Cold section of First air side coefficient of convective heat transfer：
Hot arc Secondary Air side coefficient of convective heat transfer：
Cold section of Secondary Air side coefficient of convective heat transfer：
(wherein)；
(4) hot arc usage factor：
Cold section of usage factor：
Wherein, (h), (c) represent hot arc and cold section respectively；Subscript y, k represents flue gas and air respectively；θ ', θ " are respectively
Preheater entirety smoke entrance temperature；t′k1、t″k1Preheater one piece wind out temperature is represented respectively；t′k2、t″k2Point
Wei not the overall Secondary Air import and export temperature of preheater；For flue gas mean temperature；Respectively primary and secondary air is average warm
Degree；Δ T is logarithmic mean temperature difference (LMTD)；K is heat transfer coefficient；W is flow velocity；Q is thermal discharge；FyFor flue gas actual internal area；Fk1、Fk2Point
Wei not primary and secondary air actual internal area；VyFor actual flue gas volume；α is coefficient of convective heat transfer；deqFor heat accumulation plate equivalent diameter；
Re is Reynolds number；Pr is Prandtl number；λ is thermal conductivity factor；ν is kinematic viscosity；Z is accumulation of heat template coefficient；Ct、ClRespectively count
It is related to correction factor in calculation, 1 is all can use for preheater heat exchange；H is heating surface area；xy、xk1、xk2Respectively flue gas, once
Wind and secondary air channel heating surface area account for the share of total heating surface product；ξ is that can characterize utilizing for heating surface clean-up performance to be
Number.
Step 4：According to hot arc flue gas, First air and Secondary Air and the surface heat exchanging equation of heat accumulation plate, hot arc is calculated respectively
(heat exchange equation is relevant with preheater air channel arrangement, and air preheater direction of rotation is pressed herein for heat accumulation plate wall temperature on exhaust gases passes interface
According to flue gas to Secondary Air, then to First air, finally go back to flue gas), hot arc checking conditions are listed, hot arc wind-warm syndrome of import is checked
Spend tk1,mAssumption value：
(1) hot arc flue gas and heat accumulation plate surface heat exchanging equation are set up：
Set up hot arc Secondary Air and heat accumulation plate surface heat exchanging equation：
Set up hot arc First air and heat accumulation plate surface heat exchanging equation：
(2) by t "w,y(h)=t 'w,k2(h), t "w,k2(h)=t 'w,k1(h), t "w,k1(h)=t 'w,y(h) boundary condition,
And simultaneous
(1) three equations calculate heat accumulation plate wall temperature t ' on the overall exhaust gases passes interface of preheater inw,y(h), t 'w′,y
(h), i.e., heat accumulation plate mean wall temperature at tangential (direction of rotation) import and export of hot arc smoke-gas area rotor；
(3) checking conditions：Air preheater hot arc flue gas thermal discharge is equal to heating amount of the flue gas area flue gas to heat accumulation plate, and error exists
± 2%；I.e.
The air temperature t of hot arc import assumed is checked according to above-mentioned conditionk1,m(the air temperature in i.e. cold section outlet), if
Condition is met then to assume correctly, to carry out step 5；Mistake, repeat step 3 to 4 are assumed if it can not meet condition；
Wherein, t 'w,y(h)、t″w,y(h) it is respectively tangential (direction of rotation) the import and export accumulation of heat of hot arc smoke-gas area rotor
Plate mean wall temperature；t′w,k2(h)、t″w,k2(h) it is respectively tangential (direction of rotation) the import and export accumulation of heat of hot arc Secondary Air region rotor
Plate mean wall temperature；t′w,k1(h)、t″w,k1(h) it is respectively tangential (direction of rotation) the import and export accumulation of heat of hot arc First air region rotor
Plate mean wall temperature；G (h) is hot arc heat accumulation plate heat transfer element gross mass；N is rotor speed；cx,hFor the ratio of hot arc accumulation of heat plate material
Thermal capacitance,；
Step 5：According to cold section of flue gas, First air and Secondary Air and the surface heat exchanging equation of heat accumulation plate, cold section is calculated respectively
Heat accumulation plate wall temperature on exhaust gases passes interface, lists cold section of section checking conditions, checks hot arc outlet cigarette temperature θm(cold section of import cigarette
Temperature) assumption value, heat outputting, cold section of usage factor value：
(1) cold section of flue gas and heat accumulation plate surface heat exchanging equation：
Cold section of Secondary Air and heat accumulation plate surface heat exchanging equation：
Cold section of First air and heat accumulation plate surface heat exchanging equation：
(2) by t "w,y(c)=t 'w,k2(c), t "w,k2(c)=t 'w,k1(c), t "w,k1(c)=t 'w,y(c) boundary condition,
And three equations calculate heat accumulation plate wall temperature t ' on the overall exhaust gases passes interfaces of preheater in (1) of simultaneous this stepw,y(c),
t″w,y(c), heat accumulation plate mean wall temperature at tangential (direction of rotation) import and export of as cold section smoke-gas area rotor；
(3) checking conditions：Cold section of flue gas thermal discharge of air preheater is equal to heating amount of the flue gas area flue gas to heat accumulation plate, and error exists
± 2%；I.e.
The hot arc outlet cigarette temperature θ assumed is checked according to above-mentioned conditionm(cold section of import cigarette temperature), exports step if condition is met
Hot, cold section of the usage factor calculated in rapid 3 is as cleaning gene；Mistake is assumed if it can not meet conditional, repeats to walk
Rapid 2 to 5；
Wherein, t 'w,y(c)、t″w,y(c) it is respectively tangential (direction of rotation) the import and export accumulation of heat of cold section of smoke-gas area rotor
Plate mean wall temperature；t′w,k2(c)、t″w,k2(c) it is respectively to be stored at tangential (direction of rotation) import and export of cold section of Secondary Air region rotor
Hot plate mean wall temperature；t′w,k1(c)、t″w,k1(c) it is respectively that tangential (direction of rotation) import and export of cold section of First air region rotor stores
Hot plate mean wall temperature；G (c) is cold section of heat accumulation plate heat transfer element gross mass；cx,cFor the specific heat capacity of cold section of accumulation of heat plate material；Remove into
Outside stove ature of coal parameter and structural parameters, the other specification being related in above-mentioned calculating process is all collect in DCS real-time
Parameter, the preheater hot arc of output and cold section of cleaning gene (usage factor) are also instantaneous value.
Hot arc and cold section of the real time cleaning factor (usage factor) are distributed in time making real-time parameter song by output module
(abscissa is time shaft to line chart, at intervals of DCS acquisition times interval；Ordinate is usage factor), it is segmented and accumulates as preheater
The visual data of ash monitoring, operations staff judges soot blower occasion according to hot arc and cold section of real-time parameter curve, controls hot junction
Segmentation soot blowing is carried out with the soot blower of cold end.
Brief description of the drawings
Fig. 1 is flow chart of the invention；
Fig. 2 is that preheater heat transfer element profile and hot cold end soot blower are distributed；
Fig. 3 is to be carried out being segmented cleaning gene calculation flow chart according to preheater ash deposition monitoring model by computing module.
Embodiment
The present invention is further described below in conjunction with the accompanying drawings.
Below with reference to the accompanying drawing of the present invention, clear, complete description is carried out to the technical scheme in the embodiment of the present invention
And discussion, it is clear that as described herein is only a part of example of the present invention, is not whole examples, based on the present invention
In embodiment, the every other implementation that those of ordinary skill in the art are obtained on the premise of creative work is not made
Example, belongs to protection scope of the present invention.
As shown in Figure 1 to Figure 3, a kind of three points of storehouses rotary preheater segmentation dust stratification monitoring method, data acquisition module, meter
Calculate module and output module.Wherein data acquisition module in power plant's gathered data by directly realizing, and Power Plant DCS or SIS
The output of system measuring point is typically Excel list data forms, is relatively easy to collection on the premise of clear and definite measuring point；Computing module due to
It is related to that parameter is more and process need to use loop iteration, therefore passes through Matlab programming realizations；Output module needs to be presented real-time
Parametric plot, can also program forming curves figure by Matlab by output valve and realize.(computer programming can also select it
His software)
Data acquisition module includes adopting for as-fired coal prime number evidence, preheater structural parameters and preheater real-time running data
Collection.Wherein as-fired coal prime number also needs to the proportioning of different coal samples according to being obtained by coal analysis if burning coal sample is blending coal.
Preheater structural parameters are obtained by preheater product description, it is necessary to accumulation of heat plate material, heat accumulation plate quality, heat accumulation plate length
(evening up), heat accumulation plate heating surface area, flue gas circulation area, First air circulation area, Secondary Air circulation area, cold section of ratio of heat,
Flue gas and ventilation area account for total circulation area share.Real-time running data is gathered by Power Plant DCS System, main measuring point bag
Include：Preheater rotor speed, boiler fired coal amount, boiler efficiency, smoke entrance temperature, First air out temperature, Secondary Air
Out temperature, First air inlet flow rate and Secondary Air import and export flow, and (above-mentioned measuring point is indispensable, and survey should be increased as power plant lacks
Point).
The usage factor that computing module defines preheater is cleaning gene, and usage factor is more big, shows that preheater is more clear
Clean, usage factor is smaller, and showing that preheater dust stratification needs to carry out soot blowing.Therefore, it is defined as the preheater profit of cleaning gene
Characterize dust stratification degree indirectly with coefficient, hot, cold section of usage factor need to be calculated by carrying out segmentation dust stratification monitoring.Calculating process is led to
Matlab programming realizations are crossed, first importing the data gathered in data acquisition module (due to being Excel forms, can directly read
Take), specific calculation procedure is following (referring to accompanying drawing 3)：
Step 1：According to the overall thermal balance of preheater, the average excess air coefficient of air side is calculated, fume side, which is always leaked out, is
Number：
(1) fume side thermal discharge：
(2) First air absorbs heat：
Secondary Air absorbs heat：
Integrated air recepts the caloric：(wherein g2=1-g1)
(3) the average excess air coefficient of air side is calculated according to actual measurement preheater Secondary Air average discharge：
Wherein
(4) according to thermal balance Qy=Qk, formula (1) and (2) in this step of simultaneous calculate the total air leakage coefficient Δ α of fume side；
Wherein, QyFor overall flue gas thermal discharge；QkRecepted the caloric for integrated air；Qk1Recepted the caloric for one piece wind；Qk2For
Overall Secondary Air caloric receptivity；Iy′、Iy" it is respectively smoke entrance enthalpy；Ik1′、Ik1" it is respectively that First air imports and exports air enthalpy；
Ik2′、Ik2" it is respectively that Secondary Air imports and exports air enthalpy；(added for the average enthalpy of air side import and export by a secondary air duct
Power)；D1' it is First air inlet flow rate；D2′、D2" import and export flow for Secondary Air；V0For theoretical air volume；For boiler thermal protection
Coefficient, takes 0.998；g1、g2Respectively first and second wind flow accounts for the share of total air mass flow；Averagely it is excessively for air side
Number；Δ α is the lateral fume side air leakage coefficient of air；ρkFor atmospheric density；BjTo calculate Coal-fired capacity.
Step 2：Assuming that hot arc outlet cigarette temperature θm(i.e. cold section import cigarette temperature), lists hot, cold section of equation of heat balance, calculates
Hot, cold section of air leakage coefficient Δ αh,Δαc, and hot arc inlet air mean temperature tk,m(i.e. cold section outlet air mean temperature)：
(1) hot arc equation of heat balance：
(2) cold section of equation of heat balance：
(3) according to flue gas enthalpy temperature table, by assumption value θmUtilize interpolation calculation Iy,m；
(4) (1) and (2) in this step of simultaneous and condition Δ αh+Δαc=Δ α, calculates hot, cold section of air leakage coefficient
Δαh,ΔαcWith the average enthalpy of hot arc inlet air(the average enthalpy of cold section of outlet air)；
(5) according to air enthalpy temperature table, byT is obtained using interpolation methodk,m；(wherein flue gas and air enthalpy temperature table passes through coal
Matter analysis is obtained, and this is thermodynamic computing general knowledge, is repeated no more)
Wherein, θmFor hot arc exit gas temperature (i.e. cold section import cigarette temperature)；Iy,mFor (i.e. cold section of hot arc exiting flue gas enthalpy
Import cigarette enthalpy), tk,mFor hot arc inlet air mean temperature (i.e. cold section outlet air mean temperature)；Hot arc inlet air is put down
Equal enthalpy (the average enthalpy of i.e. cold section outlet air)；Δαh,ΔαcRespectively hot, the cold section of lateral fume side air leakage coefficient of air.
Step 3：Assuming that air temperature t of hot arc importk1,m(the air temperature in i.e. cold section outlet), calculates hot, cold respectively
Section flue gas, First air and Secondary Air are to the exothermic coefficient of heat accumulation plate, then calculate hot, cold section of heating surface usage factor：
(1) air temperature t of hot arc import is assumedk1,m, according to tk,m=g1tk1,m+g2tk2,mObtain hot arc import Secondary Air
Temperature tk2,m；
(2) hot, cold section of flue gas mean temperature：
Hot, cold section of First air mean temperature：
Hot, cold section of Secondary Air mean temperature：
(3) hot arc mean temperature difference：
Cold section of mean temperature difference：
(5) hot arc heat transfer coefficient：
Cold section of heat transfer coefficient：
(6) hot arc flue gas flow rate：
Cold section of flue gas flow rate：
Hot arc First air flow velocity：
Cold section of First air flow velocity：
Hot arc Secondary Air flow velocity：
Cold section of Secondary Air flow velocity：(wherein )
(7) hot arc fume side coefficient of convective heat transfer：
Cold section of fume side coefficient of convective heat transfer：
Hot arc First air side coefficient of convective heat transfer：
Cold section of First air side coefficient of convective heat transfer：
Hot arc Secondary Air side coefficient of convective heat transfer：
Cold section of Secondary Air side coefficient of convective heat transfer：
(wherein)；
(8) hot arc usage factor：
Cold section of usage factor：
Wherein, (h), (c) represent hot arc and cold section respectively；Subscript y, k represents flue gas and air respectively；θ ', θ " are respectively
Preheater entirety smoke entrance temperature；t′k1、t″k1Preheater one piece wind out temperature is represented respectively；t′k2、t″k2Point
Wei not the overall Secondary Air import and export temperature of preheater；For flue gas mean temperature；Respectively primary and secondary air is average warm
Degree；Δ T is logarithmic mean temperature difference (LMTD)；K is heat transfer coefficient；W is flow velocity；Q is thermal discharge, kJ/kg；FyFor flue gas actual internal area；
Fk1、Fk2Respectively primary and secondary air actual internal area；VyFor actual flue gas volume；α is coefficient of convective heat transfer；deqWork as heat accumulation plate
Measure diameter；Re is Reynolds number；Pr is Prandtl number；λ is thermal conductivity factor；ν is kinematic viscosity；Z is accumulation of heat template coefficient；Ct、ClPoint
It is related to correction factor in Wei not calculating, 1 is all can use for preheater heat exchange；H is heating surface area；xy、xk1、xk2Respectively cigarette
Gas, First air and secondary air channel heating surface area account for the share of total heating surface product；ξ is that can characterize heating surface clean-up performance
Usage factor.
Step 4：According to hot arc flue gas, First air and Secondary Air and the surface heat exchanging equation of heat accumulation plate, hot arc is calculated respectively
(heat exchange equation is relevant with preheater air channel arrangement, and air preheater direction of rotation is pressed herein for heat accumulation plate wall temperature on exhaust gases passes interface
According to flue gas to Secondary Air, then to First air, finally go back to flue gas), hot arc checking conditions are listed, hot arc wind-warm syndrome of import is checked
Spend tk1,mAssumption value：
(1) hot arc flue gas and heat accumulation plate surface heat exchanging equation are set up：
Set up hot arc Secondary Air and heat accumulation plate surface heat exchanging equation：
Set up hot arc First air and heat accumulation plate surface heat exchanging equation：
(2) by t "w,y(h)=t 'w,k2(h), t "w,k2(h)=t 'w,k1(h), t "w,k1(h)=t 'w,y(h) boundary condition,
And three equations calculate heat accumulation plate wall temperature t ' on the overall exhaust gases passes interface of preheater in simultaneous (1)w,y(h), t "w,y(h)；
(3) checking conditions：Air preheater hot arc flue gas thermal discharge is equal to heating amount of the flue gas area flue gas to heat accumulation plate, and error exists
± 2%；I.e.
The air temperature t of hot arc import assumed is checked according to above-mentioned conditionk1,m(the air temperature in cold section of outlet), if full
Sufficient condition is then assumed correctly, to carry out step 5；Mistake, repeat step 3 to 4 are assumed if it can not meet conditional；
Wherein, t 'w,y(h)、t″w,y(h) it is respectively accumulation of heat at tangential (direction of rotation) import and export of hot arc smoke-gas area rotor
Plate mean wall temperature；t′w,k2(h)、t″w,k2(h) it is respectively tangential (direction of rotation) the import and export accumulation of heat of hot arc Secondary Air region rotor
Plate mean wall temperature；t′w,k1(h)、t″w,k1(h) it is respectively tangential (direction of rotation) the import and export accumulation of heat of hot arc First air region rotor
Plate mean wall temperature；G (h) is hot arc heat accumulation plate heat transfer element gross mass；N is rotor speed；cx,hFor the ratio of hot arc accumulation of heat plate material
Thermal capacitance；
Step 5：According to cold section of flue gas, First air and Secondary Air and the surface heat exchanging equation of heat accumulation plate, cold section is calculated respectively
Heat accumulation plate wall temperature on exhaust gases passes interface, lists cold section of section checking conditions, checks hot arc outlet cigarette temperature θm(cold section of import cigarette
Temperature) assumption value, heat outputting, cold section of usage factor value：
(1) cold section of flue gas and heat accumulation plate surface heat exchanging equation：
Cold section of Secondary Air and heat accumulation plate surface heat exchanging equation：
Cold section of First air and heat accumulation plate surface heat exchanging equation：
(2) by t "w,y(c)=t 'w,k2(c), t "w,k2(c)=t 'w,k1(c), t "w,k1(c)=t 'w,y(c) boundary condition,
And three equations calculate heat accumulation plate wall temperature t ' on the overall exhaust gases passes interfaces of preheater in (1) of simultaneous this stepw,y(c),
t″w,y(c)；
(3) checking conditions：Cold section of flue gas thermal discharge of air preheater is equal to heating amount of the flue gas area flue gas to heat accumulation plate, and error exists
± 2%；I.e.
The hot arc outlet cigarette temperature θ assumed is checked according to above-mentioned conditionm(cold section of import cigarette temperature), exports step if condition is met
Hot, cold section of the usage factor calculated in rapid 3 is as cleaning gene；Mistake is assumed if it can not meet conditional, repeats to walk
Rapid 2 to 5；
Wherein, t 'w,y(c)、t″w,y(c) it is respectively tangential (direction of rotation) the import and export accumulation of heat of cold section of smoke-gas area rotor
Plate mean wall temperature；t′w,k2(c)、t″w,k2(c) it is respectively tangential (direction of rotation) the import and export accumulation of heat of cold section of Secondary Air region rotor
Plate mean wall temperature；t′w,k1(c)、t″w,k1(c) it is respectively tangential (direction of rotation) the import and export accumulation of heat of cold section of First air region rotor
Plate mean wall temperature；G (c) is cold section of heat accumulation plate heat transfer element gross mass；cx,cFor the specific heat capacity of cold section of accumulation of heat plate material；
In addition to as-fired coal matter parameter and structural parameters, during the other specification being related in above-mentioned calculating process is all DCS
The real-time parameter collected, the preheater hot arc of output and cold section of cleaning gene (usage factor) are also instantaneous value.
Output module is pressed the real time cleaning factor (usage factor) of hot arc and cold section by the Plot functions in Matlab
Annual distribution makes real-time parameter curve map, and (abscissa is time shaft, at intervals of DCS acquisition times interval, usually 1min；It is vertical
Coordinate is usage factor numerical value), the foundation directly perceived of dust stratification monitoring is segmented as preheater, operations staff is according to hot arc and cold section
Real-time parameter curve judges soot blower occasion, and the soot blower of control hot junction and cold end carries out segmentation soot blowing.
The basic principles, principal features and advantages of the present invention have been shown and described above.The technical staff of the industry should
Understand, the invention is not limited in any way for above-described embodiment, it is all to be obtained by the way of equivalent substitution or equivalent transformation
Technical scheme, all falls within protection scope of the present invention.
It the above is only the preferred embodiment of the present invention, it should be pointed out that：Come for those skilled in the art
Say, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should be regarded as
Protection scope of the present invention.
Claims (6)
1. a kind of three points of storehouses rotary preheater segmentation dust stratification monitoring method, it is characterised in that comprise the following steps：
Step 1, data collecting module collected as-fired coal matter parameter, structural parameters and boiler real time execution parameter are passed through first；
Step 2, segmentation cleaning gene is carried out according to preheater ash deposition monitoring model by computing module to calculate；
Step 3, exported by way of cleaning gene is distributed in time with curvilinear figure by output module；
Segmentation cleaning gene calculating is carried out in the step 2 according to preheater ash deposition monitoring model by computing module to specifically include
Following steps：
(2a), according to the overall thermal balance of preheater, the average excess air coefficient of air side, the total air leakage coefficient of fume side are calculated；
(2b), assume a hot arc outlet cigarette temperature, list hot, cold section of equation of heat balance, calculate cold section of air leakage coefficient and heat
Section inlet air mean temperature；
(2c), assume air temperature of a hot arc import, hot arc and cold section of flue gas, First air and Secondary Air are calculated respectively to storing
The exothermic coefficient of hot plate, then calculate hot, cold section of heating surface usage factor；
(2d), the surface heat exchanging equation according to hot arc flue gas, First air and Secondary Air and heat accumulation plate, calculates hot arc flue gas and leads to respectively
Heat accumulation plate wall temperature on road interface, lists hot arc checking conditions, checks hot arc air temperature assumption value of import；
(2e), the surface heat exchanging equation according to cold section of flue gas, First air and Secondary Air and heat accumulation plate, calculates cold section of flue gas and leads to respectively
Heat accumulation plate wall temperature on road interface, lists cold section of section checking conditions, checks hot arc outlet cigarette temperature assumption value, heat outputting, cold section of profit
Use coefficient value.
2. a kind of three points of storehouses rotary preheater according to claim 1 is segmented dust stratification monitoring method, it is characterised in that：
Affiliated step (2a) calculates the average excess air coefficient of air side according to the overall thermal balance of preheater, and fume side is always leaked out
Coefficient is specially：
(a1) fume side thermal discharge：
(a2) First air absorbs heat：
Secondary Air absorbs heat：
Integrated air recepts the caloric：Wherein
<mrow>
<msubsup>
<mover>
<mi>I</mi>
<mo>&OverBar;</mo>
</mover>
<mi>k</mi>
<mrow>
<mo>&prime;</mo>
<mo>&prime;</mo>
</mrow>
</msubsup>
<mo>=</mo>
<msub>
<mi>g</mi>
<mn>1</mn>
</msub>
<msubsup>
<mi>I</mi>
<mrow>
<mi>k</mi>
<mn>1</mn>
</mrow>
<mrow>
<mo>&prime;</mo>
<mo>&prime;</mo>
</mrow>
</msubsup>
<mo>+</mo>
<msub>
<mi>g</mi>
<mn>2</mn>
</msub>
<msubsup>
<mi>I</mi>
<mrow>
<mi>k</mi>
<mn>2</mn>
</mrow>
<mrow>
<mo>&prime;</mo>
<mo>&prime;</mo>
</mrow>
</msubsup>
<mo>,</mo>
<msub>
<mi>g</mi>
<mn>1</mn>
</msub>
<mo>=</mo>
<mfrac>
<msubsup>
<mi>D</mi>
<mn>1</mn>
<mo>&prime;</mo>
</msubsup>
<mrow>
<msubsup>
<mi>D</mi>
<mn>1</mn>
<mo>&prime;</mo>
</msubsup>
<mo>+</mo>
<msubsup>
<mi>D</mi>
<mn>2</mn>
<mo>&prime;</mo>
</msubsup>
</mrow>
</mfrac>
<mo>,</mo>
<msub>
<mi>g</mi>
<mn>2</mn>
</msub>
<mo>=</mo>
<mn>1</mn>
<mo>-</mo>
<msub>
<mi>g</mi>
<mn>1</mn>
</msub>
<mo>;</mo>
</mrow>
(a3) the average excess air coefficient of air side is calculated according to actual measurement preheater Secondary Air average discharge：
Wherein
(a4) according to thermal balance Qy=Qk, (a1) and (a2) in this step of simultaneous calculates the total air leakage coefficient Δ α of fume side；
Wherein, QyFor overall flue gas thermal discharge；QkRecepted the caloric for integrated air；Qk1Recepted the caloric for one piece wind；Qk2For entirety
Secondary Air recepts the caloric；Iy′、Iy" it is respectively flue gas import and export enthalpy；Ik1′、Ik1" it is respectively First air import and export air enthalpy；Ik2′、
Ik2" it is respectively Secondary Air import and export air enthalpy；For the average enthalpy of air side import and export；D1' it is First air inlet flow rate；
D2′、D2" it is Secondary Air import and export flow；V0For theoretical air volume；For boiler errors；g1、g2Respectively first and second
Wind flow accounts for the share of total air mass flow；For the average excess coefficient of air side；Δ α is the lateral fume side air leakage coefficient of air；ρk
For atmospheric density；BjTo calculate Coal-fired capacity.
3. a kind of three points of storehouses rotary preheater according to claim 1 is segmented dust stratification monitoring method, it is characterised in that：Step
Step (2b), one hot arc of hypothesis export cigarette temperature belonging to rapid, list hot, cold section of equation of heat balance, calculate cold section of air leakage coefficient
And hot arc inlet air mean temperature is specially：
Assuming that hot arc exit gas temperature is θm
(b1) hot arc equation of heat balance is set up：
(b2) cold section of equation of heat balance is set up：
(b3) according to flue gas enthalpy temperature table, by assumption value θmUtilize interpolation calculation Iy,m；
(b4) (b1) and (b2) and condition Δ α in this step of simultaneoush+Δαc=Δ α, calculates hot, cold section of air leakage coefficient Δ
αh、ΔαcWith the average enthalpy of hot arc inlet air
(b5) according to air enthalpy temperature table, byT is obtained using interpolation methodk,m；
Wherein, θmFor hot arc exit gas temperature；Iy′、Iy" it is respectively flue gas import and export enthalpy, Iy,mFor hot arc exiting flue gas enthalpy,
tk,mFor hot arc inlet air mean temperature；The average enthalpy of hot arc inlet air；Δαh、ΔαcRespectively hot, cold section of air is lateral
Fume side air leakage coefficient；For the average excess coefficient of air side.
4. a kind of three points of storehouses rotary preheater according to claim 1 is segmented dust stratification monitoring method, it is characterised in that：Institute
State step (2c) and assume air temperature of a hot arc import, hot arc and cold section of flue gas, First air and Secondary Air pair are calculated respectively
The exothermic coefficient of heat accumulation plate, then calculate hot, cold section of heating surface usage factor and be specially：
(c1) it is t to assume air temperature of hot arc importk1,m, according to tk,m=g1tk1,m+g2tk2,mObtain hot arc import secondary air temperature
Spend tk2,m；
(c2) hot, cold section of flue gas mean temperature：
Hot, cold section of First air mean temperature：
Hot, cold section of Secondary Air mean temperature：
(c3) hot arc mean temperature difference：
Cold section of mean temperature difference：
(c4) hot arc heat transfer coefficient：
Cold section of heat transfer coefficient：
(c5) hot arc flue gas flow rate：
Cold section of flue gas flow rate：
Hot arc First air flow velocity：
Cold section of First air flow velocity：
Hot arc Secondary Air flow velocity：
Cold section of Secondary Air flow velocity：(wherein )
(c6) hot arc fume side coefficient of convective heat transfer：
Cold section of fume side coefficient of convective heat transfer：
Hot arc First air side coefficient of convective heat transfer：
Cold section of First air side coefficient of convective heat transfer：
Hot arc Secondary Air side coefficient of convective heat transfer：
Cold section of Secondary Air side coefficient of convective heat transfer：
Wherein
(c7) hot arc usage factor：
Cold section of usage factor：
Wherein, (h), (c) represent hot arc and cold section respectively；Subscript y, k1, k2 represent flue gas, First air and Secondary Air respectively；θ′、
θ " is respectively the overall smoke entrance temperature of preheater；t′k1、t″k1Preheater one piece wind import and export temperature is represented respectively；
t′k2、t″k2The respectively overall Secondary Air import and export temperature of preheater；For flue gas mean temperature；Respectively one, two
Secondary wind mean temperature；Δ T is logarithmic mean temperature difference (LMTD)；K is heat transfer coefficient；W is flow velocity；Q is thermal discharge；FyFor flue gas flow area
Product；Fk1、Fk2Respectively primary and secondary air actual internal area；VyFor actual flue gas volume；α is coefficient of convective heat transfer；deqFor accumulation of heat
Plate equivalent diameter；Re is Reynolds number；Pr is Prandtl number；λ is thermal conductivity factor；ν is kinematic viscosity；Z is accumulation of heat template coefficient；
Ct、ClIt is related to correction factor in respectively calculating；H is heating surface area；xy、xk1、xk2Respectively flue gas, First air and Secondary Air are logical
Road heating surface area accounts for the share of total heating surface product；ξ is that can characterize the usage factor of heating surface clean-up performance, θmGo out for hot arc
Mouth flue-gas temperature.
5. a kind of three points of storehouses rotary preheater according to claim 1 is segmented dust stratification monitoring method, it is characterised in that：Institute
Step (2d) is stated according to hot arc flue gas, First air and Secondary Air and the surface heat exchanging equation of heat accumulation plate, hot arc flue gas is calculated respectively
Heat accumulation plate wall temperature on passage interface, lists hot arc checking conditions, checks hot arc air temperature assumption value of import and is specially：
(d1) hot arc flue gas and heat accumulation plate surface heat exchanging equation are set up：
<mrow>
<msub>
<mi>B</mi>
<mi>j</mi>
</msub>
<msub>
<mi>Q</mi>
<mi>y</mi>
</msub>
<mrow>
<mo>(</mo>
<mi>h</mi>
<mo>)</mo>
</mrow>
<mo>=</mo>
<mi>&xi;</mi>
<mrow>
<mo>(</mo>
<mi>h</mi>
<mo>)</mo>
</mrow>
<msub>
<mi>&alpha;</mi>
<mi>y</mi>
</msub>
<mrow>
<mo>(</mo>
<mi>h</mi>
<mo>)</mo>
</mrow>
<msub>
<mi>x</mi>
<mi>y</mi>
</msub>
<mi>H</mi>
<mrow>
<mo>(</mo>
<mi>h</mi>
<mo>)</mo>
</mrow>
<mo>&lsqb;</mo>
<mover>
<mi>&theta;</mi>
<mo>&OverBar;</mo>
</mover>
<mrow>
<mo>(</mo>
<mi>h</mi>
<mo>)</mo>
</mrow>
<mo>-</mo>
<mn>0.5</mn>
<mrow>
<mo>(</mo>
<msubsup>
<mi>t</mi>
<mrow>
<mi>w</mi>
<mo>,</mo>
<mi>y</mi>
</mrow>
<mo>&prime;</mo>
</msubsup>
<mo>(</mo>
<mi>h</mi>
<mo>)</mo>
<mo>+</mo>
<msubsup>
<mi>t</mi>
<mrow>
<mi>w</mi>
<mo>,</mo>
<mi>y</mi>
</mrow>
<mrow>
<mo>&prime;</mo>
<mo>&prime;</mo>
</mrow>
</msubsup>
<mo>(</mo>
<mi>h</mi>
<mo>)</mo>
<mo>)</mo>
</mrow>
<mo>&rsqb;</mo>
<mo>;</mo>
</mrow>
Set up hot arc Secondary Air and heat accumulation plate surface heat exchanging equation：
<mrow>
<msub>
<mi>B</mi>
<mi>j</mi>
</msub>
<msub>
<mi>Q</mi>
<mrow>
<mi>k</mi>
<mn>2</mn>
</mrow>
</msub>
<mrow>
<mo>(</mo>
<mi>h</mi>
<mo>)</mo>
</mrow>
<mo>=</mo>
<mi>&xi;</mi>
<mrow>
<mo>(</mo>
<mi>h</mi>
<mo>)</mo>
</mrow>
<msub>
<mi>&alpha;</mi>
<mrow>
<mi>k</mi>
<mn>2</mn>
</mrow>
</msub>
<mrow>
<mo>(</mo>
<mi>h</mi>
<mo>)</mo>
</mrow>
<msub>
<mi>x</mi>
<mrow>
<mi>k</mi>
<mn>2</mn>
</mrow>
</msub>
<mi>H</mi>
<mrow>
<mo>(</mo>
<mi>h</mi>
<mo>)</mo>
</mrow>
<mo>&lsqb;</mo>
<mn>0.5</mn>
<mrow>
<mo>(</mo>
<msubsup>
<mi>t</mi>
<mrow>
<mi>w</mi>
<mo>,</mo>
<mi>k</mi>
<mn>2</mn>
</mrow>
<mo>&prime;</mo>
</msubsup>
<mo>(</mo>
<mi>h</mi>
<mo>)</mo>
<mo>+</mo>
<msubsup>
<mi>t</mi>
<mrow>
<mi>w</mi>
<mo>,</mo>
<mi>k</mi>
<mn>2</mn>
</mrow>
<mrow>
<mo>&prime;</mo>
<mo>&prime;</mo>
</mrow>
</msubsup>
<mo>(</mo>
<mi>h</mi>
<mo>)</mo>
<mo>)</mo>
</mrow>
<mo>-</mo>
<msub>
<mover>
<mi>t</mi>
<mo>&OverBar;</mo>
</mover>
<mrow>
<mi>k</mi>
<mn>2</mn>
</mrow>
</msub>
<mrow>
<mo>(</mo>
<mi>h</mi>
<mo>)</mo>
</mrow>
<mo>&rsqb;</mo>
<mo>;</mo>
</mrow>
Set up hot arc First air and heat accumulation plate surface heat exchanging equation：
<mrow>
<msub>
<mi>B</mi>
<mi>j</mi>
</msub>
<msub>
<mi>Q</mi>
<mrow>
<mi>k</mi>
<mn>1</mn>
</mrow>
</msub>
<mrow>
<mo>(</mo>
<mi>h</mi>
<mo>)</mo>
</mrow>
<mo>=</mo>
<mi>&xi;</mi>
<mrow>
<mo>(</mo>
<mi>h</mi>
<mo>)</mo>
</mrow>
<msub>
<mi>&alpha;</mi>
<mrow>
<mi>k</mi>
<mn>1</mn>
</mrow>
</msub>
<mrow>
<mo>(</mo>
<mi>h</mi>
<mo>)</mo>
</mrow>
<msub>
<mi>x</mi>
<mrow>
<mi>k</mi>
<mn>1</mn>
</mrow>
</msub>
<mi>H</mi>
<mrow>
<mo>(</mo>
<mi>h</mi>
<mo>)</mo>
</mrow>
<mo>&lsqb;</mo>
<mn>0.5</mn>
<mrow>
<mo>(</mo>
<msubsup>
<mi>t</mi>
<mrow>
<mi>w</mi>
<mo>,</mo>
<mi>k</mi>
<mn>1</mn>
</mrow>
<mo>&prime;</mo>
</msubsup>
<mo>(</mo>
<mi>h</mi>
<mo>)</mo>
<mo>+</mo>
<msubsup>
<mi>t</mi>
<mrow>
<mi>w</mi>
<mo>,</mo>
<mi>k</mi>
<mn>1</mn>
</mrow>
<mrow>
<mo>&prime;</mo>
<mo>&prime;</mo>
</mrow>
</msubsup>
<mo>(</mo>
<mi>h</mi>
<mo>)</mo>
<mo>)</mo>
</mrow>
<mo>-</mo>
<msub>
<mover>
<mi>t</mi>
<mo>&OverBar;</mo>
</mover>
<mrow>
<mi>k</mi>
<mn>1</mn>
</mrow>
</msub>
<mrow>
<mo>(</mo>
<mi>h</mi>
<mo>)</mo>
</mrow>
<mo>&rsqb;</mo>
<mo>;</mo>
</mrow>
(d2) by t "w,y(h)=t 'w,k2(h)、t″w,k2(h)=t 'w,k1(h)、t″w,k1(h)=t 'w,y(h) boundary condition, it is in parallel
Three equations calculate heat accumulation plate wall temperature t ' on the overall exhaust gases passes interface of preheater in vertical (d1)w,y(h)、t″w,y(h)；
(d3) checking conditions：Air preheater hot arc flue gas thermal discharge is equal to flue gas area flue gas to the heating amount of heat accumulation plate, error ±
2%；I.e.
The air temperature t of hot arc import assumed is checked according to above-mentioned conditionk1,m, assume correct if condition is met,
Carry out step (2e)；Mistake is assumed if it can not meet condition, repeat step (2c) arrives (2d)；
Wherein, t 'w,y(h)、t″w,y(h) it is respectively heat accumulation plate mean wall temperature at the tangential import and export of hot arc smoke-gas area rotor；
t′w,k2(h)、t″w,k2(h) it is respectively heat accumulation plate mean wall temperature at the tangential import and export of hot arc Secondary Air region rotor；t′w,k1(h)、
t″w,k1(h) it is respectively heat accumulation plate mean wall temperature at the tangential import and export of hot arc First air region rotor；G (h) is hot arc heat accumulation plate
Heat transfer element gross mass；N is rotor speed；cx,hFor the specific heat capacity of hot arc accumulation of heat plate material；ξ (h) is hot arc usage factor, ξ
(c) it is cold section of usage factor.
6. a kind of three points of storehouses rotary preheater according to claim 1 is segmented dust stratification monitoring method, it is characterised in that institute
Step (2e) is stated according to cold section of flue gas, First air and Secondary Air and the surface heat exchanging equation of heat accumulation plate, cold section of flue gas is calculated respectively
Heat accumulation plate wall temperature on passage interface, lists cold section of section checking conditions, checks hot arc outlet cigarette temperature assumption value, heat outputting, cold section
Usage factor value is specially：
(e1) cold section of flue gas and heat accumulation plate surface heat exchanging equation：
<mrow>
<msub>
<mi>B</mi>
<mi>j</mi>
</msub>
<msub>
<mi>Q</mi>
<mi>y</mi>
</msub>
<mrow>
<mo>(</mo>
<mi>c</mi>
<mo>)</mo>
</mrow>
<mo>=</mo>
<mi>&xi;</mi>
<mrow>
<mo>(</mo>
<mi>c</mi>
<mo>)</mo>
</mrow>
<msub>
<mi>&alpha;</mi>
<mi>y</mi>
</msub>
<mrow>
<mo>(</mo>
<mi>c</mi>
<mo>)</mo>
</mrow>
<msub>
<mi>x</mi>
<mi>y</mi>
</msub>
<mi>H</mi>
<mrow>
<mo>(</mo>
<mi>c</mi>
<mo>)</mo>
</mrow>
<mo>&lsqb;</mo>
<mover>
<mi>&theta;</mi>
<mo>&OverBar;</mo>
</mover>
<mrow>
<mo>(</mo>
<mi>c</mi>
<mo>)</mo>
</mrow>
<mo>-</mo>
<mn>0.5</mn>
<mrow>
<mo>(</mo>
<msubsup>
<mi>t</mi>
<mrow>
<mi>w</mi>
<mo>,</mo>
<mi>y</mi>
</mrow>
<mo>&prime;</mo>
</msubsup>
<mo>(</mo>
<mi>c</mi>
<mo>)</mo>
<mo>+</mo>
<msubsup>
<mi>t</mi>
<mrow>
<mi>w</mi>
<mo>,</mo>
<mi>y</mi>
</mrow>
<mrow>
<mo>&prime;</mo>
<mo>&prime;</mo>
</mrow>
</msubsup>
<mo>(</mo>
<mi>c</mi>
<mo>)</mo>
<mo>)</mo>
</mrow>
<mo>&rsqb;</mo>
<mo>;</mo>
</mrow>
Cold section of Secondary Air and heat accumulation plate surface heat exchanging equation：
<mrow>
<msub>
<mi>B</mi>
<mi>j</mi>
</msub>
<msub>
<mi>Q</mi>
<mrow>
<mi>k</mi>
<mn>2</mn>
</mrow>
</msub>
<mrow>
<mo>(</mo>
<mi>c</mi>
<mo>)</mo>
</mrow>
<mo>=</mo>
<mi>&xi;</mi>
<mrow>
<mo>(</mo>
<mi>c</mi>
<mo>)</mo>
</mrow>
<msub>
<mi>&alpha;</mi>
<mrow>
<mi>k</mi>
<mn>2</mn>
</mrow>
</msub>
<mrow>
<mo>(</mo>
<mi>c</mi>
<mo>)</mo>
</mrow>
<msub>
<mi>x</mi>
<mrow>
<mi>k</mi>
<mn>2</mn>
</mrow>
</msub>
<mi>H</mi>
<mrow>
<mo>(</mo>
<mi>c</mi>
<mo>)</mo>
</mrow>
<mo>&lsqb;</mo>
<mn>0.5</mn>
<mrow>
<mo>(</mo>
<msubsup>
<mi>t</mi>
<mrow>
<mi>w</mi>
<mo>,</mo>
<mi>k</mi>
<mn>2</mn>
</mrow>
<mo>&prime;</mo>
</msubsup>
<mo>(</mo>
<mi>c</mi>
<mo>)</mo>
<mo>+</mo>
<msubsup>
<mi>t</mi>
<mrow>
<mi>w</mi>
<mo>,</mo>
<mi>k</mi>
<mn>2</mn>
</mrow>
<mrow>
<mo>&prime;</mo>
<mo>&prime;</mo>
</mrow>
</msubsup>
<mo>(</mo>
<mi>c</mi>
<mo>)</mo>
<mo>)</mo>
</mrow>
<mo>-</mo>
<msub>
<mover>
<mi>t</mi>
<mo>&OverBar;</mo>
</mover>
<mrow>
<mi>k</mi>
<mn>2</mn>
</mrow>
</msub>
<mrow>
<mo>(</mo>
<mi>c</mi>
<mo>)</mo>
</mrow>
<mo>&rsqb;</mo>
<mo>;</mo>
</mrow>
Cold section of First air and heat accumulation plate surface heat exchanging equation：
<mrow>
<msub>
<mi>B</mi>
<mi>j</mi>
</msub>
<msub>
<mi>Q</mi>
<mrow>
<mi>k</mi>
<mn>1</mn>
</mrow>
</msub>
<mrow>
<mo>(</mo>
<mi>c</mi>
<mo>)</mo>
</mrow>
<mo>=</mo>
<mi>&xi;</mi>
<mrow>
<mo>(</mo>
<mi>h</mi>
<mo>)</mo>
</mrow>
<msub>
<mi>&alpha;</mi>
<mrow>
<mi>k</mi>
<mn>1</mn>
</mrow>
</msub>
<mrow>
<mo>(</mo>
<mi>c</mi>
<mo>)</mo>
</mrow>
<msub>
<mi>x</mi>
<mrow>
<mi>k</mi>
<mn>1</mn>
</mrow>
</msub>
<mi>H</mi>
<mrow>
<mo>(</mo>
<mi>c</mi>
<mo>)</mo>
</mrow>
<mo>&lsqb;</mo>
<mn>0.5</mn>
<mrow>
<mo>(</mo>
<msubsup>
<mi>t</mi>
<mrow>
<mi>w</mi>
<mo>,</mo>
<mi>k</mi>
<mn>1</mn>
</mrow>
<mo>&prime;</mo>
</msubsup>
<mo>(</mo>
<mi>c</mi>
<mo>)</mo>
<mo>+</mo>
<msubsup>
<mi>t</mi>
<mrow>
<mi>w</mi>
<mo>,</mo>
<mi>k</mi>
<mn>1</mn>
</mrow>
<mrow>
<mo>&prime;</mo>
<mo>&prime;</mo>
</mrow>
</msubsup>
<mo>(</mo>
<mi>c</mi>
<mo>)</mo>
<mo>)</mo>
</mrow>
<mo>-</mo>
<msub>
<mover>
<mi>t</mi>
<mo>&OverBar;</mo>
</mover>
<mrow>
<mi>k</mi>
<mn>1</mn>
</mrow>
</msub>
<mrow>
<mo>(</mo>
<mi>c</mi>
<mo>)</mo>
</mrow>
<mo>&rsqb;</mo>
<mo>;</mo>
</mrow>
(e2) by t "w,y(c)=t 'w,k2(c), t "w,k2(c)=t 'w,k1(c), t "w,k1(c)=t 'w,y(c) boundary condition, it is in parallel
Found three equations in (e1) of this step and calculate heat accumulation plate wall temperature t ' on the overall exhaust gases passes interface of preheaterw,y(c),
t″w,y(c)；
(e3) checking conditions：Cold section of flue gas thermal discharge of air preheater is equal to flue gas area flue gas to the heating amount of heat accumulation plate, error ±
2%；I.e.
The hot arc outlet cigarette temperature θ assumed is checked according to above-mentioned conditionm, if exporting calculated in step 3 hot, cold if meeting condition
The usage factor of section is used as cleaning gene；Mistake is assumed if it can not meet condition, repeat step (2b) arrives (2e)；
Wherein, t 'w,y(c)、t″w,y(c) it is respectively heat accumulation plate mean wall temperature at the cold section of tangential import and export of smoke-gas area rotor；
t′w,k2(c)、t″w,k2(c) it is respectively the cold section of tangential import and export heat accumulation plate mean wall temperature of Secondary Air region rotor；t′w,k1(c)、
t″w,k1(c) it is respectively the cold section of tangential import and export heat accumulation plate mean wall temperature of First air region rotor；G (c) is that cold section of heat accumulation plate is passed
Thermal element gross mass；cx,cFor the specific heat capacity of cold section of accumulation of heat plate material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510482303.6A CN105091932B (en) | 2015-08-07 | 2015-08-07 | A kind of three points of storehouses rotary preheater segmentation dust stratification monitoring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510482303.6A CN105091932B (en) | 2015-08-07 | 2015-08-07 | A kind of three points of storehouses rotary preheater segmentation dust stratification monitoring method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105091932A CN105091932A (en) | 2015-11-25 |
| CN105091932B true CN105091932B (en) | 2017-09-29 |
Family
ID=54572876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510482303.6A Active CN105091932B (en) | 2015-08-07 | 2015-08-07 | A kind of three points of storehouses rotary preheater segmentation dust stratification monitoring method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105091932B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106681284A (en) * | 2016-11-17 | 2017-05-17 | 上海发电设备成套设计研究院 | Coal-fired boiler heat-absorbing surface slagging contamination degree on-line real-time monitoring method |
| CN107219251B (en) * | 2017-06-28 | 2019-08-13 | 西安交通大学 | It is a kind of for testing the device and method of smoke gas afterheat heat exchanger dust stratification characteristic |
| CN108491360B (en) * | 2018-02-26 | 2022-04-01 | 北京天玛智控科技股份有限公司 | Coal mining amount calculation method |
| CN110132342A (en) * | 2019-05-22 | 2019-08-16 | 江苏方天电力技术有限公司 | Power station air preheater dust stratification monitoring method based on Clustering |
| CN110362873A (en) * | 2019-06-19 | 2019-10-22 | 华能集团技术创新中心有限公司 | Soot blowing control method, system, medium and equipment |
| CN110595555B (en) * | 2019-09-27 | 2020-09-01 | 江苏方天电力技术有限公司 | Flue gas flow distribution online monitoring method based on real-time coal quality condition |
| CN113361171B (en) * | 2021-06-11 | 2022-12-09 | 西安交通大学 | Method for monitoring ash deposition layering of rotary air preheater based on finite difference method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101034009A (en) * | 2007-04-09 | 2007-09-12 | 上海发电设备成套设计研究院 | Online detecting, soot blowing and optimal energy-saving method for large coal-fired boiler |
| CN102968561A (en) * | 2012-11-16 | 2013-03-13 | 国家电气设备检测与工程能效测评中心（武汉） | Energy efficiency assessment model and method for boiler system |
| CN103914615A (en) * | 2014-03-14 | 2014-07-09 | 上海交通大学 | Temperature field online estimating method for rotary air-preheater with self-correcting function |
| CN104215546A (en) * | 2014-08-15 | 2014-12-17 | 国家电网公司 | Monitoring system for ash fouling in power station boiler air preheater and working method of system |
| CN204202642U (en) * | 2014-05-06 | 2015-03-11 | 胡妍 | A kind of electric power system region environment monitoring system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05256660A (en) * | 1992-03-11 | 1993-10-05 | Nec Corp | Measured data monitoring and processing method and device thereof |
-
2015
- 2015-08-07 CN CN201510482303.6A patent/CN105091932B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101034009A (en) * | 2007-04-09 | 2007-09-12 | 上海发电设备成套设计研究院 | Online detecting, soot blowing and optimal energy-saving method for large coal-fired boiler |
| CN102968561A (en) * | 2012-11-16 | 2013-03-13 | 国家电气设备检测与工程能效测评中心（武汉） | Energy efficiency assessment model and method for boiler system |
| CN103914615A (en) * | 2014-03-14 | 2014-07-09 | 上海交通大学 | Temperature field online estimating method for rotary air-preheater with self-correcting function |
| CN204202642U (en) * | 2014-05-06 | 2015-03-11 | 胡妍 | A kind of electric power system region environment monitoring system |
| CN104215546A (en) * | 2014-08-15 | 2014-12-17 | 国家电网公司 | Monitoring system for ash fouling in power station boiler air preheater and working method of system |
Non-Patent Citations (1)
| Title |
|---|
| 基于火电厂DCS数据的回转式空气预热器运行性能评价及其预测;马悦;《中国优秀硕士学位论文全文数据库（电子期刊）工程科技Ⅱ辑》;20070915(第3期);正文第19-39、46页及附图5-4/4-8/5-5/4-4 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105091932A (en) | 2015-11-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105091932B (en) | A kind of three points of storehouses rotary preheater segmentation dust stratification monitoring method | |
| CN107219251B (en) | It is a kind of for testing the device and method of smoke gas afterheat heat exchanger dust stratification characteristic | |
| EP3521748B1 (en) | Dual model approach for boiler section cleanliness calculation | |
| CN106322412B (en) | Coal unit convection heating surface intelligent ash blowing method based on two-dimentional optimizing | |
| CN103604132B (en) | Boiler Convection Heating Surface dust stratification on-line monitoring system | |
| CN103914615B (en) | A kind of rotary regenerative air heater temperature field On-line Estimation method of band self-correcting function | |
| CN103699780B (en) | Ature of coal parameter is in the chaos optimization method of line computation | |
| CN203949198U (en) | The multistage retracting device of natural gas fume afterheat | |
| CN107883392A (en) | Feedforward neural network control method and system suitable for flue gas waste heat recovery apparatus | |
| CN103728339B (en) | A kind of real-time identification method for average heat resistance of heat-exchange equipment on thermal power boiler side | |
| CN108197723B (en) | Optimized energy-saving scheduling method for coal consumption and pollutant discharge of coal-electricity unit power supply | |
| CN105135468B (en) | Smoke waste heat utilization system | |
| CN106649945A (en) | Calculation method for determining generated power and smoke discharge parameters of single-shaft gas turbine | |
| CN104655673A (en) | Online diagnosis method for heat exchange performances of tri-sectional rotary type air preheater | |
| CN109932649A (en) | A kind of fired power generating unit generating efficiency monitoring method | |
| CN104655672A (en) | On-line heat exchange performance diagnosis method for two-branch-bin rotary air preheater | |
| CN104238534B (en) | Online monitoring device and online monitoring method for boiling degree of blast-furnace gas boiler economizer | |
| CN104267710A (en) | Blast-furnace gas boiler economizer boiling degree on-line monitoring device and method | |
| CN208735652U (en) | The eliminating white smoke system that a kind of heat exchanger and air preheater combine | |
| CN106765245A (en) | A kind of smoke waste heat utilization system | |
| CN104729810B (en) | The method of testing of air preheater hot junction air leak rate of air curtain | |
| CN209279687U (en) | A kind of ferrosilicon mineral hot furnace waste heat exchanger | |
| CN107014861A (en) | A kind of finned tube testing device for heat transferring performance of single | |
| CN111594862A (en) | Flue gas waste heat recovery evaluation system and method | |
| CN107451304A (en) | The modelling by mechanism computational methods of reheater transfer function model |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information |
Inventor after: Yue Junfeng Inventor after: Chen Youfu Inventor after: Ding Jianliang Inventor after: Zou Lei Inventor after: Zhang Enxian Inventor after: Guan Shipian Inventor after: Xu Ligang Inventor after: Huang Yaji Inventor after: Ma Xinli Inventor after: Xiao Jie Inventor before: Yue Junfeng Inventor before: Chen Youfu Inventor before: Ding Jianliang Inventor before: Zou Lei Inventor before: Zhang Enxian Inventor before: Guan Shipian Inventor before: Xu Ligang Inventor before: Huang Yaji Inventor before: Ma Xinli Inventor before: Xiao Jie |
|
| CB03 | Change of inventor or designer information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |