CN104008307B - Method for calculating in-boiler coal amount of pulverized coal and blast furnace gas multi-fuel-fired boiler - Google Patents
Method for calculating in-boiler coal amount of pulverized coal and blast furnace gas multi-fuel-fired boiler Download PDFInfo
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Abstract
The invention discloses a method for calculating the in-boiler coal amount of a pulverized coal and blast furnace gas multi-fuel-fired boiler. The problem that in the prior art, the in-boiler coal mount corresponding to the working condition can not be accurately acquired in a direct measuring mode for a boiler which is provided with a storage pulverizing system is solved. According to the method, acquired input parameters are used, then step by step computation is conducted, and at last the volume content percentage of three-atom gas in dry flue gas is obtained, the difference value of the calculating value of the volume content percentage of the three-atom gas and a practical measuring value is compared with a preset error range, if the difference value of the calculating value of the volume content percentage of the three-atom gas and the practical measuring value is beyond the preset error range, the in-boiler coal amount is regulated and calculated again until the difference value of the calculating value and the practical measuring value is within the preset error range, and the practical in-boiler coal amount is determined. The method solves the difficult problem that the in-boiler coal amount can not be calculated accurately in the boiler which is provided with the storage pulverizing system, and therefore the thermal efficiency of the pulverized coal and blast furnace gas multi-fuel-fired boiler can be conducted smoothly.
Description
Technical field
The present invention relates to the measuring method entering stove Coal-fired capacity of a kind of coal dust and blast furnace gas multi-fuel fired boiler.
Background technology
Iron and steel enterprise produces substantial amounts of blast furnace gas during smelting, and due to blast furnace gas, to have calorific value low, nitrogenous
Amount height and the feature of poor combustion stability, many steel plant are all insufficient to the utilization of blast furnace gas at present, substantial amounts of blast furnace coal
Gas is all diffused, and causes the waste of the energy, so how to make full use of the blast furnace gas resource of by-product in process for producing steel and iron, becomes
Problem for person skilled general concern.
In recent years, coal dust and blast furnace gas multi-fuel fired boiler achieve successful Application in some steel plant and progressively promote, and lead to
Cross and blast furnace gas is introduced pulverized-coal fired boiler, individually burning is more difficult to solve the problems, such as blast furnace gas, significantly reduces height
The bleeding rate of producer gas.And from the perspective of steel plant, can preferable land productivity by the way of coal dust and blast furnace gas multifuel combustion
With blast furnace gas, contribute to realizing the balance of blast furnace gas pipeline network.Additionally, after burning blast-furnace gas mixed by pulverized-coal fired boiler, SO2、NOxWith
The discharge capacity of dust granules thing is all reduced significantly compared with traditional pulverized-coal fired boiler.Therefore, coal dust and blast furnace gas
The mode of multifuel combustion has wide application prospect, especially in Current resource growing tension and the higher and higher shape of environmental requirement
Under gesture, more can highlight its economic benefit and social benefit.
The thermal efficiency of boiler reflects the heat-economy of unit operation, is the key index of unit performance examination.For coal
Powder and blast furnace gas multi-fuel fired boiler, the pure firing coal dust boiler calculating with routine of its thermal efficiency or pure burning blast-furnace gas boiler are
Different part is the measurement problem of fuel quantity.For conventional pure firing coal dust boiler or pure burning blast-furnace gas boiler, utilize
Back balance computational methods do not need into stove fuel quantity；And for coal dust and blast furnace gas multi-fuel fired boiler, to accurately solve coal dust
With the thermal efficiency of blast furnace gas multi-fuel fired boiler, either adopt positive balance computational methods or back balance computational methods, all necessary
Known enter stove Coal-fired capacity and enter the proportioning of stove blast furnace coal tolerance.For the boiler of configuration unit pulverized-coal system, belt can be adopted
The coal-supplying amount that weighing coal feeder measurement obtains enters stove Coal-fired capacity as boiler；Pot for configuration the ball type pulverizer system
Stove, due to being ultimately delivered to the coal dust amount of burner hearth and the coal-supplying amount not peer-to-peer entering coal pulverizer, is difficult to pass through direct measurement
Mode accurately to obtain and enter stove Coal-fired capacity under corresponding operating mode, and most of coal dusts and blast furnace gas multi-fuel fired boiler configure at present
Be all the ball type pulverizer system, this just give boiler thermal output solution bring very big difficulty.
Therefore, build a measuring method entering stove Coal-fired capacity being applied to coal dust and blast furnace gas multi-fuel fired boiler, be solution
Certainly current coal dust and the breach of a thermal efficiency solution difficult problem for blast furnace gas multi-fuel fired boiler, have important Practical significance.
Content of the invention
For the problems referred to above, the present invention provides a kind of accurate, convenient coal dust and the stove that enters of blast furnace gas multi-fuel fired boiler to fire
The measuring method of coal amount.
For reaching above-mentioned purpose, the measuring method bag entering stove Coal-fired capacity of coal dust of the present invention and blast furnace gas multi-fuel fired boiler
Include：
Step 1, obtains |input paramete, and described |input paramete at least includes dry flue gas parameter, and described dry flue gas parameter is at least
Measured value φ ' (RO including the volume content percentage rate of three atomic gas in dry flue gas2)；
Step 2, predetermined one enters stove Coal-fired capacity Bc；
Step 3, calculates and described pre- is incorporated into stove Coal-fired capacity BcUnder the conditions of fuel combination performance data；
Step 4, calculates and described pre- is incorporated into stove Coal-fired capacity BcUnder the conditions of the carbon quality fallen of fuel combination Actual combustion
Percent content；
Step 5, calculates and described pre- is incorporated into stove Coal-fired capacity BcUnder the conditions of fuel combination characteristic coefficient；
Step 6, calculates and described pre- is incorporated into stove Coal-fired capacity BcUnder the conditions of in dry flue gas three atomic gas volume content percentage
Rate φ 'js(RO2)；
Step 7, by the volume content percentage rate φ ' of three atomic gas in the described dry flue gas calculatingjs(RO2) with described
The measured value φ ' (RO of the volume content percentage rate of three atomic gas in dry flue gas2) be compared, if the difference of the two exceed pre-
Determine range of error, then willPre- it is incorporated into stove Coal-fired capacity B as newc, then re-execute step 3～step 7, directly
To calculating φ 'js(RO2) and φ ' (RO2) difference in the range of predictive error, determine and final pre- be incorporated into stove Coal-fired capacity BcMake
Enter stove Coal-fired capacity B for actualc.
Further, described |input paramete also includes coal-fired performance data, the performance data of blast furnace gas, lime-ash parameter
And enter stove blast furnace gas flow；
Described coal-fired performance data includes coal-fired As-received ash mass content percentage rate, coal-fired As-received carbon matter
Amount percent content, coal-fired As-received protium mass content percentage rate, coal-fired As-received oxygen element mass content percentage rate, combustion
Coal As-received nitrogen mass content percentage rate and coal-fired As-received element sulphur mass content percentage rate；
The performance data of described blast furnace gas includes the volume content percentage rate of the CO in blast furnace gas, H2Volume content
Percentage rate, CO2Volume content percentage rate, N2Volume content percentage rate, O2Volume content percentage rate, Hydrocarbon CmHn
Volume content percentage rate and moisture volume content percentage rate；
Described lime-ash parameter includes unburned carbon in flue dust and boiler slag carbon content；
Described dry flue gas parameter also includes O in dry flue gas2The measured value of volume content percentage rate, the volume content hundred of CO
Divide the measured value of rate；
The performance data of described fuel combination includes fuel combination As-received ash mass content percentage rate, fuel combination is received
To base carbon mass content percentage rate, fuel combination As-received protium mass content percentage rate, fuel combination As-received oxygen
Element mass content percentage rate, fuel combination As-received nitrogen mass content percentage rate, fuel combination As-received element sulphur matter
Amount percent content.
Further, the computation formula of the performance data of described fuel combination is
yi=bcoalxcoal,i+bgasxgas,i,
Wherein yiFor the performance data of described fuel combination, bcoal、bgasIt is respectively coal-fired consumption and blast furnace gas consumption
Amount accounts for the share of fuel combination consumption, xcoal,i、xgas,iIt is respectively coal-fired characteristic corresponding with the performance data of fuel combination
Data and the performance data of blast furnace gas；
bcoal、bgasComputing formula be respectively：Bc
For described enter stove Coal-fired capacity, BgStove blast furnace gas flow, ρ is entered described under standard stategasFor blast furnace gas under standard state
Density.
Further, under described standard state blast furnace gas density pgasComputing formula be
ρgas=0.0125 φ (CO)+0.0009 φ (H2)+∑(0.0054m+0.00045n)φ(CmHn)+0.0196φ
(CO2)+0.0125φ(N2)+0.0143φ(O2)+0.008φ(H2O), wherein φ (CO), φ (H2)、φ(CO2)、φ(N2)、
φ(O2)、φ(CmHn)、φ(H2O) it is respectively the volume content percentage rate of CO, institute described in the performance data of described blast furnace gas
State H2Volume content percentage rate, described CO2Volume content percentage rate, described N2Volume content percentage rate, described O2Appearance
Long-pending percent content, described Hydrocarbon CmHnVolume content percentage rate and described moisture volume content percentage rate.
Further, the computing formula of the carbon mass content percentage rate that described fuel combination Actual combustion is fallen is
Wherein,The carbon mass content percentage rate falling for described fuel combination Actual combustion, Car、AarIt is respectively institute
State fuel combination As-received carbon mass content percentage rate and described fuel combination As-received ash mass content percentage rate,
rlz、rfhIt is respectively slag, ash quantity accounts for the share of coal-fired total ash quantity in flying dust,For described boiler slag carbon content,For described
Unburned carbon in flue dust.
Further, the computing formula of described fuel combination characteristic coefficient is
Wherein, β is described fuel combination characteristic coefficient, Har、Oar、NarAnd SarIt is respectively described fuel combination As-received hydrogen
Element mass content percentage rate, described fuel combination As-received oxygen element mass content percentage rate, described fuel combination As-received
Nitrogen mass content percentage rate and described fuel combination As-received element sulphur mass content percentage rate.
Further, in dry flue gas three atomic gas volume content percentage rate φ 'js(RO2) computing formula be
Wherein φ ' (CO) is the volume content of CO in described dry flue gas
The measured value of percentage rate, φ ' (O2) it is O in described dry flue gas2Volume content percentage rate measured value.
Coal dust of the present invention and the measuring method entering stove Coal-fired capacity of blast furnace gas multi-fuel fired boiler, coal-fired by being incorporated into stove in advance
The dry flue gas compositional data obtained under the conditions of amount and the dry flue gas compositional data that smoke sampling analysis is obtained are compared, if two
The difference that person compares outside predictive error scope, is then adjusted and recalculates to entering stove Coal-fired capacity, until both differences
In the range of predictive error, so that it is determined that final enters stove Coal-fired capacity, overcome configuration the ball type pulverizer system in prior art
Boiler accurate measurement cannot enter the difficulty of stove Coal-fired capacity, so that coal dust and the blast furnace gas multi-fuel fired boiler thermal efficiency are calculated
To be smoothed out.
Brief description
Fig. 1 is the schematic flow sheet of the present invention.
Specific embodiment
With reference to Figure of description, the present invention will be further described.
Coal dust of the present invention and the measuring method entering stove Coal-fired capacity of blast furnace gas multi-fuel fired boiler, comprise the following steps：
Step 1, obtain every |input paramete, and described items |input paramete includes the performance data of fire coal, blast furnace gas
Performance data, lime-ash parameter, dry flue gas parameter, enter stove blast furnace gas flow.
Raw coal and coal dust are sampled and analyze：Carry out raw coal sampling on feeder and sediment tube respectively and coal dust takes
Sample, carries out assay to coal sample and coal dust sample and calculating is processed, and obtains the property data of coal-fired spy.Coal-fired special property number
Receive according to the coal-fired As-received ash mass content percentage rate of inclusion, the mass content percentage rate of coal-fired As-received carbon, fire coal
The mass content percentage rate of base protium, the mass content percentage rate of coal-fired As-received oxygen element, coal-fired As-received nitrogen
Mass content percentage rate and the mass content percentage rate of coal-fired As-received element sulphur；
Blast furnace gas is sampled and analyzes：On blast furnace gas pipeline, blast furnace gas is sampled before boiler, so
Afterwards blast furnace gas sample is carried out with assay and calculating is processed, obtain the performance data of blast furnace gas.The characteristic of blast furnace gas
Data includes volume content percentage rate φ (CO) of the CO in blast furnace gas, H2Volume content percentage rate φ (H2)、CO2Appearance
Long-pending percent content φ (CO2)、N2Volume content percentage rate φ (N2)、O2Volume content percentage rate φ (O2), all kinds of hydrocarbon
Compound CmHnVolume content percentage rate φ (CmHn) and moisture volume content percentage rate φ (H2O)；
Flying dust, slag are sampled and analyze：Carry out Fly ash sampling in air preheater exhaust pass, to flying dust sample
Product carry out unburned combustible in fly ash analysis, obtain unburned carbon in flue dust；Carry out slag sampling in slag remover exit, to slag
Sample carries out unburned combustible in slag analysis, obtains boiler slag carbon content.
Flue gas is sampled and analyzes：Press the principle of uiform section gridding method in air preheater exhaust pass, to cigarette
Gas samples, and fume sample is analyzed obtain dry flue gas parameter.Dry flue gas parameter includes O in dry flue gas2Volume content
The measured value φ ' (O of percentage rate2), the measured value φ ' (CO) of the volume content percentage rate of CO and three atomic gas RO2Volume contain
The measured value φ ' (RO of amount percentage rate2)；
Measure to entering stove blast furnace gas flow：On blast furnace gas main pipe before boiler, effusion meter is installed, by flow
Measurement measures into stove blast furnace gas flow Bg.
Step 2, predetermined one enters stove Coal-fired capacity Bc.
Step 3, calculates and is incorporated into stove Coal-fired capacity B in advancecUnder the conditions of fuel combination performance data.
The performance data of described fuel combination includes fuel combination As-received ash Aar, fuel combination As-received carbon matter
Amount percent content Car, fuel combination As-received protium mass content percentage rate Har, fuel combination As-received oxygen element quality
Percent content Oar, fuel combination As-received nitrogen mass content percentage rate Nar, fuel combination As-received element sulphur quality contains
Amount percentage rate Sar.
The computation formula of the performance data of fuel combination is：yi=bcoalxcoal,i+bgasxgas,i,
Wherein, yiFor a certain item performance data in the performance data of above-mentioned fuel combination, xcoal,i、xgas,iBe respectively with
yiThe performance data of corresponding fire coal and the performance data of blast furnace gas, wherein performance data x of blast furnace gasgas,iBe through
Performance data after conversion, the characteristic after conversion and coal-fired characterisitic parameter xcoal,iCharacteristic identical；bcoal、bgasIt is respectively and fire
Consumption of coal amount and blast furnace gas consumption account for the share of fuel combination consumption.
bcoal、bgasComputing formula be respectively
With
Wherein, BxFor described enter stove Coal-fired capacity, BcUnit be kg/h；BgStove blast furnace coal is entered described under standard state
Throughput, unit is m3/h；ρgasFor the density of blast furnace gas under standard state, unit is kg/m3.
ρgasComputational methods be
ρgas=0.0125 φ (CO)+0.0009 φ (H2)+∑(0.0054m+0.00045n)φ(CmHn)+0.0196φ
(CO2)+0.0125φ(N2)+0.0143φ(O2)+0.008φ(H2O)
In formula, φ (CO), φ (H2)、φ(CO2)、φ(N2)、φ(O2)、φ(CmHn)、φ(H2O) it is respectively in step 1
CO, H in blast furnace gas blast furnace gas sampled and obtains after analyzing2、CO2、N2、O2、CmHn、H2The volume content hundred of O
Divide rate.
Because the performance data of blast furnace gas and coal-fired performance data are variant in expression way, need in advance to height
The performance data of producer gas is converted, and could be synthesized with coal-fired corresponding performance data.
, the volume content percentage rate in the performance data of blast furnace gas needs to be scaled in advance taking elementary analysiss composition as a example
Blast furnace gas As-received mass content percentage rate, could be synthesized with coal-fired As-received elemental composition, same blast furnace gas As-received
Moisture is also such.It is below carbon, protium, oxygen element, the reduction formula of nitrogen：
In formula, (Car)gas、(Har)gas、(Oar)gas、(Nar)gasIt is respectively the blast furnace gas As-received carbon after converting
Mass content percentage rate, the mass content percentage rate of blast furnace gas As-received protium, the matter of blast furnace gas As-received oxygen element
Amount percent content, the mass content percentage rate of blast furnace gas As-received nitrogen, unit is %.
Element sulphur it should be noted that because blast furnace gas sulfur content is considerably less, almost can ignore, after therefore converting
Content (Sar)gasCan be by zero process；Equally, the dust content of blast furnace gas is relatively low, especially for presently the most conventional coal gas
Dry-dedusting system, outlet dust content of gas only has 2～5mg/m3, therefore convert after content of ashes (Aar)gasAlso can be by zero
Reason.
Step 4, calculates and is incorporated into stove Coal-fired capacity B in advancecUnder the conditions of the carbon mass content hundred fallen of fuel combination Actual combustion
Divide rateComputing formula is：WhereinFor fuel combination
The carbon mass content percentage rate that Actual combustion is fallen, unit is %；rlz、rfhBe respectively slag, in flying dust ash quantity account for coal-fired total
The share of ash quantity, unit is %, typically using being manually set, is taken as 85% and 15% respectively；It is respectively stove
Slag phosphorus content, unburned carbon in flue dust, unit is %.
Step 5, calculates and is incorporated into stove Coal-fired capacity B in advancecUnder the conditions of fuel combination characteristic coefficient β.
Computing formula is：
Wherein β is fuel combination characteristic coefficient, Har、Oar、NarAnd SarIt is respectively fuel combination As-received protium quality to contain
Amount percentage rate, fuel combination As-received oxygen element mass content percentage rate, fuel As-received nitrogen mass content percentage rate and
Fuel combination As-received element sulphur mass content percentage rate, unit is %.
Step 6, calculates and is incorporated into stove Coal-fired capacity B in advancecUnder the conditions of three atomic gas volume content percentage rate in dry flue gas
φ′js(RO2).
Computing formula is：
Wherein φ ' (CO) is the measured value of the volume content percentage rate of CO in described dry flue gas, and unit is %；φ′(O2)
For O in described dry flue gas2Volume content percentage rate measured value, unit be %.
Step 7, is incorporated into stove Coal-fired capacity B in advancecUnder the conditions of calculate described three atomic gas volume content percentage rate φ 'js
(RO2) with step 1 in smoke sampling and in the dry flue gas that obtains after analyzing three atomic gas volume content percentage rate actual measurement
Value φ ' (RO2) be compared, if the difference of the two exceedes predictive error scope, willAs new predetermined entering
Stove Coal-fired capacity Bc, re-execute step 3 to step 7, until obtaining φ 'js(RO2) and φ ' (RO2) difference in predictive error model
In enclosing, determine and finally predetermined enter stove Coal-fired capacity BcEnter stove Coal-fired capacity for required.
Coal dust of the present invention and the measuring method entering stove Coal-fired capacity of blast furnace gas multi-fuel fired boiler, coal-fired by being incorporated into stove in advance
The dry flue gas compositional data obtained under the conditions of amount and the dry flue gas compositional data that smoke sampling analysis is obtained are compared, if two
The difference that person compares outside predictive error scope, is then adjusted and recalculates to entering stove Coal-fired capacity, until both differences
In the range of predictive error, so that it is determined that final enters stove Coal-fired capacity, overcome configuration the ball type pulverizer system in prior art
Boiler accurate measurement cannot enter the difficulty of stove Coal-fired capacity, so that coal dust and the blast furnace gas multi-fuel fired boiler thermal efficiency are calculated
To be smoothed out.
More than, only presently preferred embodiments of the present invention, but protection scope of the present invention is not limited thereto, any it is familiar with basis
Those skilled in the art the invention discloses technical scope in, the change or replacement that can readily occur in, all should cover
Within protection scope of the present invention.Therefore, protection scope of the present invention should be defined by the protection domain that claim is defined.
Claims (4)
1. the measuring method entering stove Coal-fired capacity of a kind of coal dust and blast furnace gas multi-fuel fired boiler is it is characterised in that described measuring and calculating side
Method includes：
Step 1, obtains |input paramete, and described |input paramete at least includes dry flue gas parameter, and described dry flue gas parameter at least includes
The measured value φ ' (RO of the volume content percentage rate of three atomic gas in dry flue gas2)；
Step 2, predetermined one enters stove Coal-fired capacity Bc；
Step 3, calculates and described pre- is incorporated into stove Coal-fired capacity BcUnder the conditions of fuel combination performance data；
Step 4, calculates and described pre- is incorporated into stove Coal-fired capacity BcUnder the conditions of the carbon mass content hundred fallen of fuel combination Actual combustion
Divide rate；
Step 5, calculates and described pre- is incorporated into stove Coal-fired capacity BcUnder the conditions of fuel combination characteristic coefficient；
Step 6, calculates and described pre- is incorporated into stove Coal-fired capacity BcUnder the conditions of in dry flue gas three atomic gas volume content percentage rate
φ′js(RO2)；
Step 7, by the volume content percentage rate φ ' of three atomic gas in the described dry flue gas calculatingjs(RO2) and described dry cigarette
The measured value φ ' (RO of the volume content percentage rate of three atomic gas in gas2) be compared, if the difference of the two exceedes predetermined mistake
Difference scope, then willPre- it is incorporated into stove Coal-fired capacity B as newc, then re-execute step 3～step 7, until
Calculate φ 'js(RO2) and φ ' (RO2) difference in the range of predictive error, determine and final pre- be incorporated into stove Coal-fired capacity BcAs
Actual enters stove Coal-fired capacity Bc；
Described |input paramete also includes coal-fired performance data, the performance data of blast furnace gas, lime-ash parameter and enters stove blast furnace
Gas flow；
Described coal-fired performance data includes coal-fired As-received ash mass content percentage rate, coal-fired As-received carbon quality contains
Amount percentage rate, coal-fired As-received protium mass content percentage rate, coal-fired As-received oxygen element mass content percentage rate, coal-fired receipts
To base nitrogen mass content percentage rate and coal-fired As-received element sulphur mass content percentage rate；
The performance data of described blast furnace gas includes the volume content percentage rate of the CO in blast furnace gas, H2Volume content percentage
Rate, CO2Volume content percentage rate, N2Volume content percentage rate, O2Volume content percentage rate, Hydrocarbon CmHnAppearance
The volume content percentage rate of long-pending percent content and moisture；
Described lime-ash parameter includes unburned carbon in flue dust and boiler slag carbon content；
Described dry flue gas parameter also includes O in dry flue gas2The measured value of volume content percentage rate and CO volume content percentage rate
Measured value；
The performance data of described fuel combination includes fuel combination As-received ash mass content percentage rate, fuel combination As-received
Carbon mass content percentage rate, fuel combination As-received protium mass content percentage rate, fuel combination As-received oxygen element
Mass content percentage rate, fuel combination As-received nitrogen mass content percentage rate and fuel combination As-received element sulphur quality contain
Amount percentage rate；
The computation formula of the performance data of described fuel combination is
yi=bcoalxcoal,i+bgasxgas,i,
Wherein yiFor the performance data of described fuel combination, bcoal、bgasIt is respectively coal-fired consumption and blast furnace gas consumption accounts for
The share of fuel combination consumption, xcoal,i、xgas,iIt is respectively coal-fired performance data corresponding with the performance data of fuel combination
Performance data with blast furnace gas；
bcoal、bgasComputing formula be respectively：Wherein BcFor
Described enter stove Coal-fired capacity, BgStove blast furnace gas flow, ρ is entered described under standard stategasFor blast furnace gas under standard state
Density；
The density p of blast furnace gas under described standard stategasComputing formula be
ρgas=0.0125 φ (CO)+0.0009 φ (H2)+∑(0.0054m+0.00045n)φ(CmHn)+0.0196φ(CO2)+
0.0125φ(N2)+0.0143φ(O2)+0.008φ(H2O),
Wherein φ (CO), φ (H2)、φ(CO2)、φ(N2)、φ(O2)、φ(CmHn)、φ(H2O) it is respectively described blast furnace gas
The volume content percentage rate of CO described in performance data, described H2Volume content percentage rate, described CO2Volume content percentage
Rate, described N2Volume content percentage rate, described O2Volume content percentage rate, described Hydrocarbon CmHnVolume content
The volume content percentage rate of percentage rate and described moisture.
2. the measuring method entering stove Coal-fired capacity of coal dust and blast furnace gas multi-fuel fired boiler according to claim 1, its feature exists
In the computing formula of the carbon mass content percentage rate that described fuel combination Actual combustion is fallen is
Wherein,The carbon mass content percentage rate falling for described fuel combination Actual combustion, Car、AarIt is respectively described mixed
Close fuel As-received carbon mass content percentage rate and described fuel combination As-received ash mass content percentage rate, rlz、rfh
It is respectively slag, ash quantity accounts for the share of coal-fired total ash quantity in flying dust,For described boiler slag carbon content,For described flying marking
Amount.
3. the measuring method entering stove Coal-fired capacity of coal dust and blast furnace gas multi-fuel fired boiler according to claim 2, its feature exists
In the computing formula of described fuel combination characteristic coefficient is
Wherein, β is described fuel combination characteristic coefficient, Har、Oar、NarAnd SarIt is respectively described fuel combination As-received protium
Mass content percentage rate, described fuel combination As-received oxygen element mass content percentage rate, described fuel combination As-received nitrogen unit
Quality amount percent content and described fuel combination As-received element sulphur mass content percentage rate.
4. the measuring method entering stove Coal-fired capacity of coal dust and blast furnace gas multi-fuel fired boiler according to claim 3, its feature exists
In the volume content percentage rate φ ' of three atomic gas in dry flue gasjs(RO2) computing formula beWherein β is described fuel combination characteristic coefficient, φ ' (CO)
For the measured value of the volume content percentage rate of CO in described dry flue gas, φ ' (O2) it is O in described dry flue gas2Volume content percentage
The measured value of rate.
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| CN104615895B (en) * | 2015-02-12 | 2017-08-25 | 中冶华天工程技术有限公司 | The measuring method of coal dust and blast furnace gas multi-fuel fired boiler air leak rate of air preheater |
| CN104615899B (en) * | 2015-02-12 | 2017-10-31 | 中冶华天工程技术有限公司 | Metallurgical gases boiler air preheater air leak rate of air curtain measuring method |
| CN104614197A (en) * | 2015-02-12 | 2015-05-13 | 中冶华天工程技术有限公司 | Thermal efficient on-line monitoring method for furnace with multi-fuel combustion of pulverized coal and blast-furnace gas |
| CN111666531B (en) * | 2020-04-23 | 2023-08-25 | 中冶华天工程技术有限公司 | Fuel combustion calculation method under condition of high content of residual CO in flue gas |
| CN114252472B (en) * | 2021-12-14 | 2023-11-03 | 云南华电镇雄发电有限公司 | Online measurement method and system for boiler feeding coal amount |
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