CN109798537A - A kind of coal quality parameter control method guaranteeing quasi- eastern coal burning boiler safe operation - Google Patents

A kind of coal quality parameter control method guaranteeing quasi- eastern coal burning boiler safe operation Download PDF

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CN109798537A
CN109798537A CN201910071463.XA CN201910071463A CN109798537A CN 109798537 A CN109798537 A CN 109798537A CN 201910071463 A CN201910071463 A CN 201910071463A CN 109798537 A CN109798537 A CN 109798537A
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coal
content
furnace
eastern
ash
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CN109798537B (en
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刘家利
姚伟
方顺利
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Xian Thermal Power Research Institute Co Ltd
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Thermal Power Research Institute
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Abstract

The invention discloses a kind of coal quality parameter control methods for guaranteeing quasi- eastern coal burning boiler safe operation, suitable for the eastern coal burning boiler of standard with good Anti-slagging and stain resistance energy, the mixing for additives such as coal-fired PM10 and the kaolin of quasi- eastern coal burning boiler can be instructed to match well, improve boiler operatiopn safety；Specific steps are as follows: 1, by mixing to burn the content of ashes of coal, ash component content and mixing and burn mass ratio ash component content into furnace mixed coal is calculated, or test to obtain the ash component content into furnace mixed coal according to GB/T1574-2007 coal ash analysis method；2, the basic anhydride content HB into furnace mixed coal, acidic oxide content HA, alkali acid ratio HB/A and HB/A*Na are calculated2O index；3, according to whether meeting following standard simultaneously determines whether furnace mixed coal can guarantee the safe operation of boiler: 1) HNa2O≤4%；2)HFe2O3≤ 10%, as HCaO > 15%, HFe2O3≤ 8%；3) HCaO≤25%；4) HB≤36%；5)HB/A≤0.8；6)HB/A*Na2O≤2.3%.

Description

A kind of coal quality parameter control method guaranteeing quasi- eastern coal burning boiler safe operation
Technical field
The present invention relates to the technical fields of pulverized-coal fired boiler safe operation, and in particular to a kind of quasi- eastern coal burning boiler safety fortune of guarantee Capable coal quality parameter control method, suitable for latter design and the eastern coal pot of the standard with good anti-slag and stain resistance energy to put into operation Furnace, can be used for quasi- eastern coal burning boiler coal-fired PM10 or it is coal-fired with it is kaolinic mix with etc..
Background technique
Quasi- east coal easily catch fire, easily after-flame and sulfur content is lower, is a kind of power in environmental protection that combustibility is excellent use Coal.Compared with domestic other Serious Slagging coals, Na in quasi- east coal coal ash2O, the basic anhydride such as CaO, MgO content it is high and SiO2And Al2O3Equal acidic oxides content is low, and boiler burner hearth Serious Slagging easily occurs when using quasi- eastern coal and convection heating surface is tight Weight contamination problems, current most of units need to be transported by mixing the safety for burning the additives such as low sodium coal or kaolin to guarantee unit Row.But how by controlling the determining suitable low sodium coal mixed-fuel burning proportion of crucial coal quality parameter into furnace mixed coal and how choosing conjunction Suitable additive and ratio does not provide explicitly temporarily at present.
Liu Jiali et al. is sintered ratio test by coal ash and has obtained B/A and Na2O index joint effect coal ash contamination Can, the result of study of Li Junjie et al. shows that quasi- eastern coal stains internal layer and has apparent Na2SO4And CaSO4Enrichment.Cao Peiqing is logical The contamination performance test that eastern coal quasi- to removing sodium carries out laboratory is crossed, has obtained lower Na2O content can substantially reduce quasi- eastern coal Contamination performance, but higher Fe in coal ash2O3Still cannot be guaranteed quasi- eastern coal with alkali metal contents such as CaO 100% uses.
Normal family magnitude people obtains according to the Small And Medium Capacity station boiler operative practice that the quasi- eastern coal of burning is mixed in Urumchi surrounding area Na in coal ash out2O content can be used as the monitoring index for guaranteeing safe operation of the boiler.Li Yuhang et al. is obtained by additive test Guarantee the safe operation of quasi- eastern coal unit in addition to needing to control Na2O content is also needed the elements mass fraction such as calcium in coal ash and iron It is reduced to reasonable level.Cao Peiqing mixes the slagging properties after burning by the kaolin of live quasi- eastern coal and heterogeneity and tests, and grinds Study carefully that the basic test result with Li Yuhang in laboratory of result is consistent, and proposing also needs Al2O3Control is in a reasonable interval. But the studies above does not provide specific controlling value, and operability is poor, and part result of study is the non-quasi- east based on early stage Coal burning boiler or Anti-slagging and the insufficient quasi- eastern coal burning boiler summary of soil resistant measure obtain, have been not suitable with current newly designed tool There is the eastern coal burning boiler of the standard of excellent Anti-slagging and stain resistance energy.
The eastern coal burning boiler of standard designed at present takes stringent Anti-slagging and soil resistant measure, such as amplify boiler furnace namely Lesser furnace load parameter, enough soot blower quantity, amplification convection heating surface tube spacing etc. are selected, boiler is directed at eastern coal Adaptability centainly enhanced.But whether the eastern coal burning boiler of such standard with excellent anti-slag and stain resistance energy being capable of clean burn standard Eastern coal is mixed and enters the control of furnace mixed coal key coal index still without specific regulation after burning.
Summary of the invention
In order to overcome above-mentioned disadvantage of the existing technology, the purpose of the present invention is to provide a kind of guarantee is newly designed The coal quality parameter control method of the eastern coal burning boiler safe operation of standard with excellent Anti-slagging and stain resistance energy, the quasi- east of collaboration consideration The influence of coal slagging and contamination performance to safe operation of the boiler, the quasi- eastern coal unit safety operation that is guaranteed enter furnace mixed coal pass Key coal index controlling value.
In order to achieve the above objectives, the invention adopts the following technical scheme:
A kind of coal quality parameter control method of the quasi- eastern coal burning boiler safe operation of guarantee, is suitable for newly designed with excellent The eastern coal burning boiler of the standard of Anti-slagging and stain resistance energy, specifically comprises the following steps:
Step 1: being calculated by mixing the content of ashes for burning coal, ash component content and mixing burning mass ratio into furnace The ash component content of mixed coal, or according to GB/T1574-2007 coal ash analysis method test to obtain the ash into furnace mixed coal at Divide content；The ash component includes SiO2、Al2O3、Fe2O3、CaO、MgO、Na2O、K2O and TiO2；
The calculation method for wherein entering furnace mixed coal difference ash component content is as follows:
HY=(R1*Y1*Aar1+R2*Y2*Aar2+.。。。+Ri*Yi*Aari)/(R1*Aar1+R2*Aar2+.。。。+Ri*Aari)
Wherein: HY indicates the SiO into furnace mixed coal2、Al2O3、Fe2O3、CaO、MgO、Na2O、K2O and TiO2In eight ash components A certain ash component content, %；That is HSiO2、HAl2O3Respectively indicate the SiO into furnace mixed coal2、Al2O3Content, %, with such It pushes away；
RiIt indicates to mix and burns the mass ratio that coal i Zhan always mixes burning coal, %
AariIt indicates to mix the content of ashes for burning coal i, %
YiIt indicates to mix a certain ash component content for burning coal i, %.
Second step；Calculate the basic anhydride content HB into furnace mixed coal, acidic oxide content HA, alkali acid ratio HB/A and HB/A*Na2O index；
Wherein HB=HFe2O3+HCaO+HMgO+HNa2O+HK2O%
HA=HSiO2+HAl2O3+HTiO2%
HB/A=HB/HA
HB/A*Na2O=HB/A × HNa2O
Third step；It determines whether furnace mixed coal can guarantee the safe operation of boiler according to following standard, need to meet simultaneously 6 provide below:
(1)HNa2O≤4%
(2)HFe2O3≤ 10%, as HCaO > 15%, HFe2O3≤ 8%
(3) HCaO≤25%
(4) HB≤36%
(5)HB/A≤0.8
(6)HB/A*Na2O≤2.3%.
The eastern coal burning boiler of standard with excellent Anti-slagging and stain resistance energy is controlled according to above-mentioned requirements into furnace mixed coal Matter, following table are the basic demands of 360MW and 660MW capacitance grade boiler.
Capacitance grade MW 360 660
Furnace cross MW/m2 ≤3.8 ≤4.0
Burner region furnace wall area thermic load MW/m2 ≤1.1 ≤1.1
Furnace volume heat release rate kW/m3 ≤70 ≤60
Burner last time wind snout extremely screen bottom size m ≥23.0 ≥26.5
Lowest level burner break distance m on dry bottom hopper >=5.0 (wall firing >=4.5) >=5.50 (wall firings
Furnace exit temperature DEG C ≤970 ≥≤5.907)0
Burner hearth is short to be blown only ≥90 ≥96
Horizontal flue and back-end ductwork soot blower are only ≥50 ≥80
。
Compared to the prior art compared with the present invention has following advantage:
1) often family magnitude people mixes the Small And Medium Capacity station boiler operative practice for burning quasi- eastern coal according to Urumchi surrounding area Obtain Na in coal ash2O content can be used as the monitoring index for guaranteeing safe operation of the boiler.The index is excessively unilateral, does not examine comprehensively Consider other ash components to be directed at eastern coal slagging and stain the influence of performance, and the controlling value of the index is to for newly designed at present The directiveness of the eastern coal unit of standard with excellent Anti-slagging and stain resistance energy is poor, does not fully consider unit design improvement pair The raising of quasi- east coal adaptability.All things considered guarantees there is excellent Anti-slagging and releasing currently without pertinent literature clear stipulaties The newly designed quasi- eastern coal burning boiler safe operation of dirty performance needs to control which coal index and corresponding controlling value.The present invention Different components of coal ash are considered comprehensively is directed at eastern coal slagging and the influence of contamination performance and quasi- eastern coal pot newly designed at present Furnace is directed at the raising of eastern coal adaptability, proposes multiple coal index monitoring and corresponding control range, can subject to eastern coal unit Safe operation provide scientific basis.
2) existing result of study shows Na2O、B/A、Fe2O3、CaO、B/A*Na2O etc. is directed at the safe operation of eastern coal Important function is played, but does not have its control range of clear stipulaties.The present invention innovatively proposes control as-fired coal kind Na2O、Fe2O3, CaO, alkali metal oxide content B, alkali acid ratio B/A, B/A*Na2The quasi- eastern coal machine of multiple index common guarantees such as O The safe operation of group.
3) present invention considers the newly designed eastern coal burning boiler pair of the standard with excellent Anti-slagging and stain resistance energy comprehensively The raising of quasi- east coal adaptability, therefore propose the Na in coal ash2O content is increased to 4%.
4) data show that coal ash alkali acid ratio B/A and B/A*Na2O be directed at the slagging of eastern coal and stain performance influence compared with Greatly, but components of coal ash is simply just classified as acidic oxide and basic anhydride by this index, not careful to consider different acid Property oxide or different basic anhydride index between be directed at eastern coal slagging and stain the difference that performance influences.The present invention retains Such combination ash component index is directed at the influence of eastern coal unit safety operation, and gives specific controlling value；Consider simultaneously Different alkaline ash components are directed at eastern coal burning boiler slagging and stain the influence of performance, and patent proposes also needs Fe2O3With CaO etc. Small Indicators are controlled in corresponding range.
5) present invention controls the safe operation of the quasi- eastern coal unit of common guarantee by single Small Indicators and combined index.
Specific embodiment
The present invention is described in more detail With reference to embodiment.
Whether the Tianchi embodiment 1:100% energy of coal can be in the newly designed quasi- eastern coal of 360MW and 660MW capacitance grade Clean burn on boiler
Step 1: being calculated by mixing the content of ashes for burning coal, ash component content and mixing burning mass ratio into furnace The ash component content of mixed coal, or according to GB/T1574-2007 coal ash analysis method test to obtain the ash into furnace mixed coal at Divide content.The ash component specifically includes SiO2、Al2O3、Fe2O3、CaO、MgO、Na2O、K2O and TiO2。
The present embodiment is tested to obtain the ash component into furnace mixed coal according to GB/T1574-2007 coal ash analysis method and is referred to Mark, specifically includes (SiO2、Al2O3、Fe2O3、CaO、MgO、Na2O、K2O、TiO2)；
The present embodiment as-fired coal is the single coal of Tianchi energy of coal, and test result is as follows for ash component:
SiO21=13.54%, Al2O31=14.79%, Fe2O31=5.68%, CaO1=32.74%, MgO1= 3.59%, Na2O1=4.63%, K2O1=0.70%, TiO21=1.13%
Second step；Calculate the basic anhydride content HB into furnace mixed coal, acidic oxide content HA, alkali acid ratio HB/A and HB/A*Na2O index；
Wherein HB=HFe2O3+HCaO+HMgO+HNa2O+HK2O%
HA=HSiO2+HAl2O3+HTiO2%
HB/A=HB/HA
HB/A*Na2O=HB/A × HNa2O
Since this as-fired coal is single coal,
HSiO2=SiO21=13.54%, HAl2O3=Al2O31=14.79%, HFe2O3=Fe2O31=5.68%, HCaO =CaO1=32.74%, HMgO=MgO1=3.59%, HNa2O=Na2O1=4.63%, HK2O=K2O1=0.70%, HTiO2 =TiO21=1.13%
The calculated result of the present embodiment Tianchi energy of coal is as follows
HB=HFe2O3+HCaO+HMgO+HNa2O+HK2O=5.68%+32.74%+3.59%+4.63%+0.70%= 47.34%
HA=HSiO2+HAl2O3+HTiO2=13.54%+14.79%+1.13%=29.46%
HB/A=HB/HA=47.34%/29.46%=1.61
HB/A*Na2O=HB/A × HNa2O=1.61 × 4.63%=7.45%.
Third step；It determines whether furnace mixed coal can guarantee the safe operation of boiler according to following standard, need to meet simultaneously 6 regulations below.
(1)HNa2O≤4%
(2)HFe2O3≤ 10%, as HCaO > 15%, HFe2O3≤ 8%
(3) HCaO≤25%
(4) HB≤36%
(5)HB/A≤0.8
(6)HB/A*Na2O≤2.3%.
For this Tianchi energy of coal, be unsatisfactory for condition has (1), (3), (4), (5) and (6) totally five, therefore cannot Meet safety and uses requirement.
Whether energy of coal+10% alkali ditch coal in the Tianchi embodiment 2:90% can set 360MW and 660MW capacitance grade is newest Clean burn on the eastern coal burning boiler of the standard of meter
Step 1: being calculated by mixing the content of ashes for burning coal, ash component content and mixing burning mass ratio into furnace The ash component content of mixed coal, or according to GB/T1574-2007 coal ash analysis method test to obtain the ash into furnace mixed coal at Divide content.The ash component specifically includes SiO2、Al2O3、Fe2O3、CaO、MgO、Na2O、K2O and TiO2。
The calculation method for wherein entering furnace mixed coal difference ash component content is as follows:
HY=(R1*Y1*Aar1+R2*Y2*Aar2+.。。。+Ri*Yi*Aari)/(R1*Aar1+R2*Aar2+.。。。+Ri*Aari)
Wherein: the SiO of HY expression mixed coal2、Al2O3、Fe2O3、CaO、MgO、Na2O、K2O and TiO2Certain in eight ash components One ash component content, %.Such as HSiO2、HAl2O3Respectively indicate the SiO into furnace mixed coal2、Al2O3Content, %, and so on；
RiIt indicates to mix and burns the mass ratio that coal i Zhan always mixes burning coal, %
AariIt indicates to mix the content of ashes for burning coal i, %
YiIt indicates to mix a certain ash component content for burning coal i, %.
This enters furnace mixed coal and is burnt mixing for 1 Tianchi energy of coal of coal and 10% mass ratio by mixing for 90% mass ratio and burnt coal 2 Alkali ditch coal is constituted, then R1=0.9, R2=0.1；
The present embodiment mix burn 1 Tianchi energy of coal of coal ash component test result is as follows:
SiO21=13.54%, Al2O31=14.79%, Fe2O31=5.68%, CaO1=32.74%, MgO1= 3.59%, Na2O1=4.63%, K2O1=0.70%, TiO21=1.13%
The present embodiment mix burn 2 alkali ditch coal of coal ash component test result is as follows:
SiO22=57.00%, Al2O32=22.70%, Fe2O32=5.78%, CaO2=4.14%, MgO2=2.19%, Na2O2=0.58%, K2O2=1.54%, TiO22=1.02%
The present embodiment Tianchi energy of coal and alkali ditch pit ash content are respectively 3.28% and 17.26%
The ash component data into furnace mixed coal are obtained according to the calculation method for entering furnace mixed coal ash component, specific calculated result is such as Under:
HSiO2=(R1×SiO21×Aar1+R2×SiO22×Aar2)/(R1×Aar1+R2×Aar2)=(0.9 × 13.54 × 3.28+0.1 × 57.00 × 17.26)/(0.9 × 3.28+0.1 × 17.26)=29.58%
HAl2O3=(R1×Al2O31×Aar1+R2×Al2O32×Aar2)/(R1×Aar1+R2×Aar2)=(0.9 × 14.79 × 3.28+0.1 × 22.70 × 17.26)/(0.9 × 3.28+0.1 × 17.26)=17.71%
HFe2O3=(R1×Fe2O31×Aar1+R2×Fe2O32×Aar2)/(R1×Aar1+R2×Aar2)=(0.9 × 5.68 × 3.28+0.1 × 5.78 × 17.26)/(0.9 × 3.28+0.1 × 17.26)=5.72%
HCaO=(R1×CaO1×Aar1+R2×CaO2×Aar2)/(R1×Aar1+R2×Aar2)=(0.9 × 32.74 × 3.28+0.1 × 4.14 × 17.26)/(0.9 × 3.28+0.1 × 17.26)=22.19%
HMgO=(R1×MgO1×Aar1+R2×MgO2×Aar2)/(R1×Aar1+R2×Aar2)=(0.9 × 3.59 × 3.28 + 0.1 × 2.19 × 17.26)/(0.9 × 3.28+0.1 × 17.26)=3.07%
HNa2O=(R1×Na2O1×Aar1+R2×Na2O2×Aar2)/(R1×Aar1+R2×Aar2)=(0.9 × 4.63 × 3.28+0.1 × 0.58 × 17.26)/(0.9 × 3.28+0.1 × 17.26)=3.14%
HK2O=(R1×K2O1×Aar1+R2×K2O2×Aar2)/(R1×Aar1+R2×Aar20.9 × 0.70 × 3.28+ of)=( 0.1 × 1.54 × 17.26)/(0.9 × 3.28+0.1 × 17.26)=1.01%
HTiO2=(R1×TiO21×Aar1+R2×TiO22×Aar2)/(R1×Aar1+R2×Aar2)=(0.9 × 1.13 × 3.28+0.1 × 1.02 × 17.26)/(0.9 × 3.28+0.1 × 17.26)=1.09%
Second step；Calculate the basic anhydride content HB into furnace mixed coal, acidic oxide content HA, alkali acid ratio HB/A and HB/A*Na2O index；
Wherein HB=HFe2O3+HCaO+HMgO+HNa2O+HK2O%
HA=HSiO2+HAl2O3+HTiO2%
HB/A=HB/HA
HB/A*Na2O=HB/A × HNa2O%
The calculated result for entering furnace mixed coal of the alkali ditch coal of+10% mass ratio of Tianchi energy of coal of 90% mass ratio of the present embodiment It is as follows:
HB=HFe2O3+HCaO+HMgO+HNa2O+HK2O=5.72%+22.19%+3.07%+3.14%+1.01%= 35.13%
HA=SiO2+Al2O3+TiO2=29.58%+17.71%+1.09%=48.38%
HB/A=35.13%/48.38%=0.73
HB/A*Na2O=B/A × Na2O=0.73 × 3.14%=2.29%
Third step；Determine whether furnace mixed coal can guarantee the safe operation of boiler according to following standard, while under satisfaction 6, face prescribed requirement.
(1)HNa2O≤4%
(2)HFe2O3≤ 10%, as HCaO > 15%, HFe2O3≤ 8%
(3) HCaO≤25%
(4) HB≤36%
(5)HB/A≤0.8
(6)HB/A*Na2O≤2.3。
The ash component for entering furnace mixed coal for 90% mass of the present embodiment than+10% quality of Tianchi energy of coal than alkali ditch coal and Index of correlation meets aforementioned (1) (2) (3) (4) (5) (6) all six, therefore meets safety and use requirement.
Whether energy of coal+10% kaolin in the Tianchi embodiment 3:90% can set 360MW and 660MW capacitance grade is newest Clean burn on the eastern coal burning boiler of the standard of meter
Step 1: being calculated by mixing the content of ashes for burning coal, ash component content and mixing burning mass ratio into furnace The ash component content of mixed coal, or according to GB/T1574-2007 coal ash analysis method test to obtain the ash into furnace mixed coal at Divide content.The ash component specifically includes SiO2、Al2O3、Fe2O3、CaO、MgO、Na2O、K2O and TiO2。
The calculation method that the present embodiment enters furnace mixed coal difference ash component content is as follows:
HY=(R1*Y1*Aar1+R2*Y2*Aar2+.。。。+Ri*Yi*Aari)/(R1*Aar1+R2*Aar2+.。。。+Ri*Aari)
Wherein: the SiO of HY expression mixed coal2、Al2O3、Fe2O3、CaO、MgO、Na2O、K2O and TiO2Certain in eight ash components One ash component content, %.Such as HSiO2、HAl2O3Respectively indicate the SiO into furnace mixed coal2、Al2O3Content, %, and so on；
RiIt indicates to mix and burns the mass ratio that coal i Zhan always mixes burning coal, %
AariIt indicates to mix the content of ashes for burning coal i, %
YiIt indicates to mix a certain ash component content for burning coal i, %.
The present embodiment enter furnace mixed coal by 90% mass ratio mix burn 1 Tianchi energy of coal of coal and 10% mass ratio mix burning coal 2 kaolin of kind are constituted, then R1=0.9, R2=0.1；
The present embodiment mix burn 1 Tianchi energy of coal of coal ash component test result is as follows:
SiO21=13.54%, Al2O31=14.79%, Fe2O31=5.68%, CaO1=32.74%, MgO1= 3.59%, Na2O1=4.63%, K2O1=0.70%, TiO21=1.13%
The present embodiment mix burn 2 kaolinite sooty coal of coal ash component test result is as follows:
SiO22=53.36%, Al2O32=41.74%, Fe2O32=1.20%, CaO2=1.26%, MgO2=0.1%, Na2O2=0.25%, K2O2=0.48%, TiO22=0.69%
The present embodiment Tianchi energy of coal and kaolinic content of ashes are respectively 3.28% and 100%.
The ash component data into furnace mixed coal are obtained according to the calculation method for entering furnace mixed coal ash component
HSiO2=(R1×SiO21×Aar1+R2×SiO22×Aar2)/(R1×Aar1+R2×Aar2)=(0.9 × 13.54 × 3.28+0.1 × 53.36 × 100)/(0.9 × 3.28+0.1 × 100)=44.28%
HAl2O3=(R1×Al2O31×Aar1+R2×Al2O32×Aar2)/(R1×Aar1+R2×Aar2)=(0.9 × 14.79 × 3.28+0.1 × 41.74 × 100)/(0.9 × 3.28+0.1 × 100)=35.60%
HFe2O3=(R1×Fe2O31×Aar1+R2×Fe2O32×Aar2)/(R1×Aar1+R2×Aar2)=(0.9 × 5.68 × 3.28+0.1 × 1.20 × 100)/(0.9 × 3.28+0.1 × 100)=2.22%
HCaO=(R1×CaO1×Aar1+R2×CaO2×Aar2)/(R1×Aar1+R2×Aar2)=(0.9 × 32.74 × 3.28+0.1 × 1.26 × 100)/(0.9 × 3.28+0.1 × 100)=8.43%
HMgO=(R1×MgO1×Aar1+R2×MgO2×Aar2)/(R1×Aar1+R2×Aar2)=(0.9 × 3.59 × 3.28 + 0.1 × 0.1 × 100)/(0.9 × 3.28+0.1 × 100)=0.90%
HNa2O=(R1×Na2O1×Aar1+R2×Na2O2×Aar2)/(R1×Aar1+R2×Aar2)=(0.9 × 4.63 × 3.28+0.1 × 0.25 × 100)/(0.9 × 3.28+0.1 × 100)=1.25%
HK2O=(R1×K2O1×Aar1+R2×K2O2×Aar2)/(R1×Aar1+R2×Aar20.9 × 0.70 × 3.28+ of)=( 0.1 × 0.48 × 100)/(0.9 × 3.28+0.1 × 100)=0.53%
HTiO2=(R1×TiO21×Aar1+R2×TiO22×Aar2)/(R1×Aar1+R2×Aar2)=(0.9 × 1.13 × 3.28+0.1 × 0.69 × 100)/(0.9 × 3.28+0.1 × 100)=0.79%
Second step；Calculate the basic anhydride content HB into furnace mixed coal, acidic oxide content HA, alkali acid ratio HB/A and HB/A*Na2O index；
Wherein HB=HFe2O3+HCaO+HMgO+HNa2O+HK2O%
HA=HSiO2+HAl2O3+HTiO2%
HB/A=HB/HA
HB/A*Na2O=HB/A × HNa2O%
+ 10% mass ratio of Tianchi energy of coal of 90% mass ratio of the present embodiment it is kaolinic enter furnace mixed coal calculated result It is as follows
HB=HFe2O3+HCaO+HMgO+HNa2O+HK2O=2.22%+8.43%+0.90%+1.25%+0.53%= 13.33%
HA=HSiO2+HAl2O3+HTiO2=44.28%+35.60%+0.79%=80.67%
HB/A=HB/HA=13.33%/80.67%=0.17
HB/A*Na2O=HB/A × HNa2O=0.17 × 1.25%=0.21%
Third step；Determine whether furnace mixed coal can guarantee the safe operation of boiler according to following standard, while under satisfaction 6, face prescribed requirement.
(1)HNa2O≤4%
(2)HFe2O3≤ 10%, as HCaO > 15%, HFe2O3≤ 8%
(3) HCaO≤25%
(4) HB≤36%
(5)HB/A≤0.8
(6)HB/A*Na2O≤2.3%.
For 90% mass ratio of the present embodiment+10% mass ratio of Tianchi energy of coal it is kaolinic enter furnace mixed coal ash at Divide and index of correlation meets aforementioned (1) (2) (3) (4) (5) (6) all six, therefore meets safety and use requirement.

Claims (2)

1. a kind of coal quality parameter control method for guaranteeing quasi- eastern coal burning boiler safe operation, it is characterised in that: be suitable for having excellent The eastern coal burning boiler of the standard of Anti-slagging and stain resistance energy, specifically comprises the following steps:
Step 1: being calculated by mixing the content of ashes for burning coal, ash component content and mixing burning mass ratio into furnace mixed coal Ash component content, or test to obtain the ash component into furnace mixed coal according to GB/T1574-2007 coal ash analysis method and contain Amount；The ash component includes SiO2、Al2O3、Fe2O3、CaO、MgO、Na2O、K2O and TiO2；
The calculation method for wherein entering furnace mixed coal difference ash component content is as follows:
HY=(R1*Y1*Aar1+R2*Y2*Aar2+.。。。+Ri*Yi*Aari)/(R1*Aar1+R2*Aar2+.。。。+Ri*Aari)
Wherein: HY indicates the SiO into furnace mixed coal2、Al2O3、Fe2O3、CaO、MgO、Na2O、K2O and TiO2Certain in eight ash components One ash component content, %；That is HSiO2、HAl2O3Respectively indicate the SiO into furnace mixed coal2、Al2O3Content, %, and so on；
RiIt indicates to mix and burns the mass ratio that coal i Zhan always mixes burning coal, %
AariIt indicates to mix the content of ashes for burning coal i, %
YiIt indicates to mix a certain ash component content for burning coal i, %.
Second step；Calculate the basic anhydride content HB into furnace mixed coal, acidic oxide content HA, alkali acid ratio HB/A and HB/ A*Na2O index；
Wherein HB=HFe2O3+HCaO+HMgO+HNa2O+HK2O%
HA=HSiO2+HAl2O3+HTiO2%
HB/A=HB/HA
HB/A*Na2O=HB/A × HNa2O
Third step；It determines whether furnace mixed coal can guarantee the safe operation of boiler according to following standard, following 6 need to be met simultaneously Item regulation:
(1)HNa2O≤4%
(2)HFe2O3≤ 10%, as HCaO > 15%, HFe2O3≤ 8%
(3) HCaO≤25%
(4) HB≤36%
(5)HB/A≤0.8
(6)HB/A*Na2O≤2.3%.
2. a kind of coal quality parameter control method for guaranteeing quasi- eastern coal burning boiler safe operation according to claim 1, feature It is: 360MW and 660MW capacitance grade boiler in the eastern coal burning boiler of the standard with excellent Anti-slagging and stain resistance energy Basic demand is as shown in the table:
Capacitance grade MW 360 660 Furnace cross MW/m2 ≤3.8 ≤4.0 Burner region furnace wall area thermic load MW/m2 ≤1.1 ≤1.1 Furnace volume heat release rate kW/m3 ≤70 ≤60 Burner last time wind snout extremely screen bottom size m ≥23.0 ≥26.5 Lowest level burner break distance m on dry bottom hopper >=5.0 (wall firing >=4.5) >=5.50 (wall firings Furnace exit temperature DEG C ≤970 ≥≤5.907)0 Burner hearth is short to be blown only ≥90 ≥96 Horizontal flue and back-end ductwork soot blower are only ≥50 ≥80
。
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