CN110148439A - A method of it is simulated based on liquid phase and calculates coal ash or mixed coal ash melting temperature - Google Patents
A method of it is simulated based on liquid phase and calculates coal ash or mixed coal ash melting temperature Download PDFInfo
- Publication number
- CN110148439A CN110148439A CN201910410563.0A CN201910410563A CN110148439A CN 110148439 A CN110148439 A CN 110148439A CN 201910410563 A CN201910410563 A CN 201910410563A CN 110148439 A CN110148439 A CN 110148439A
- Authority
- CN
- China
- Prior art keywords
- coal ash
- temperature
- liquid phase
- mixed
- mixed coal
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16C—COMPUTATIONAL CHEMISTRY; CHEMOINFORMATICS; COMPUTATIONAL MATERIALS SCIENCE
- G16C20/00—Chemoinformatics, i.e. ICT specially adapted for the handling of physicochemical or structural data of chemical particles, elements, compounds or mixtures
- G16C20/10—Analysis or design of chemical reactions, syntheses or processes
Abstract
The invention discloses a kind of methods simulated based on liquid phase and calculate coal ash or mixed coal ash melting temperature, coal ash chemical component and mass percent are inputted by Factsage7.2 Thermodynamic Simulation software, calculates coal ash in 820 DEG C ~ 1500 DEG C of liquid phase quality score and relationship and the mapping of temperature.Changed by liquid phase generating rate and determine four sections, deformation temperature, softening temperature, the flowing temperature of coal ash are determined by the point of interface in section.The present invention is easy to operate using the method for FactSage software prediction ash melting temperature, and calculation amount is few, and accuracy is high, and wide adaptation range has apparent advantage in terms of prediction coal ash and mixed coal coal ash meltbility.
Description
Technical field
The present invention relates to a kind of methods simulated based on liquid phase and calculate coal ash or mixed coal ash melting temperature, belong to coal gasification
Technical field of improvement.
Background technique
Coal ash melting property is a critical nature index of coal combustion or gasification.In gasification, the selection of the type of furnace and
The setting of operating condition is all closely bound up with the melting characteristic of coal ash, and coal ash melting property is mainly reflected on coal ash melting temperature.
The grey melting temperature of coal all has a significant impact to boiler scaling characteristic and the thermal efficiency, and many countries have all formulated to be come with ash fusion point
Judge the standard of boiler scaling characteristic.Coal gasification technique may be generally divided into dry ash extraction and gaseous state deslagging two according to deslagging mode
Kind, two kinds of deslagging modes have certain requirement to coal ash melting temperature.To adapt to different deslagging requirements, coal ash melting need to be changed
Temperature, it is general that ash fusion point is adjusted by addition auxiliary agent and coal blending etc., while wherein coal blending method makes full use of all coal resources
Cost is also reduced, but the uncertain of ash fusion point limits the application of this method after coal blending.Coal ash melting temperature mainly leads at present
It crosses chemical composition or mineral factors is predicted, and the predictor formula established.But have one by the method that chemical composition calculates
The fixed scope of application, and the generation to react to each other between coal ash Minerals with low-temperature eutectic object make the big restriction of prediction result deviation
The applications of these formula.Mineral factors need X-ray diffraction experiment and software to count mineral species and relative amount
It calculates, program complexity and heavy workload constrain the application of these formula to a certain extent.
Summary of the invention
Present invention aims in view of the deficiencies of the prior art, provide a kind of only simulate by thermodynamic software to calculate drawing
Deformation temperature, softening temperature and the flowing temperature that coal ash or mixed coal ash can be accurately determined, there is the ash fusion point of coal
The regulation of effect ground.
To achieve the goals above, the technology used in the present invention method is as follows:
A method of it is simulated based on liquid phase and calculates coal ash or mixed coal ash melting temperature comprising the steps of:
(1) raw coal is put into Muffle furnace and is prepared into coal ash according to GB/T1574-2008.
(2) using x-ray fluorescence instrument measurement coal ash or mixed coal ash composition and its content, and by from greatly to minispread.
(3) start Factsage7.2 Thermodynamic Simulation software and enter Equilib module.
(4) FactPS and FTxoid database is selected, inputs what coal ash or mixed coal is grey in the box of Reactants
Preceding 10 kinds of ingredients and its mass fraction, such as SiO2, Al2O3, CaO etc..
(5) setting initial temperature is 820 DEG C, and outlet temperature is 1500 DEG C, and 20 DEG C are an interval, and setting pressure is one
Standard atmospheric pressure.
(6) FTxoid-SLAGA are selected to be calculated, obtain the liquid phase quality score of coal ash at each temperature or mixed coal ash,
Setting temperature is abscissa, and liquid phase quality score is ordinate, draws line chart.
(7) changed by liquid phase generating rate and determine four sections, the point of interface in four sections is followed successively by coal from low to high
Deformation temperature (DT), softening temperature (ST) and the flowing temperature (FT) of ash or mixed coal ash；The liquid phase in second section increases
Rate 0.6-0.8%/DEG C within the scope of, temperature corresponding to the beginning and terminal position in the section be determined as coal ash or mixed coal ash
Deformation temperature, softening temperature；Temperature corresponding to 4th section beginning is determined as the flowing temperature of coal ash or mixed coal ash, at this time
Coal ash or mixed coal ash liquid content reach peak and no longer change.
The invention has the benefit that
1. present invention determine that the method for coal ash or mixed coal ash melting temperature is relatively simple, it is only necessary to know that oxide composition therein
And its mass fraction, data are substituted into Factsage7.2 Thermodynamic Simulation software and are calculated.
2. can more intuitively extrapolate the characteristic temperature of coal ash or mixed coal ash in melting process according to line chart
(deformation temperature, softening temperature and flowing temperature), it is very clear.
3. the present invention is applied widely, coal ash after the ash of coal or biomass, the various auxiliary agents of addition, two kinds or two kinds with
The upper mixed ash of coal can carry out the determination of melting temperature using this method.
4. the present invention has apparent cost advantage.
Detailed description of the invention:
Fig. 1 is the shanxi coal ash liquid phase content change diagram of embodiment 1 in the present invention；
Fig. 2 is the Fujian coal ash liquid content variation diagram of embodiment 2 in the present invention；
Fig. 3 is the grey 1 liquid content variation diagram of mixed coal of embodiment 3 in the present invention；
Fig. 4 is the grey 2 liquid content variation diagrams of mixed coal of embodiment 4 in the present invention.
Specific embodiment:
Below by specific case study on implementation, the present invention will be described in detail.Protection scope of the present invention includes but is not limited to
Following case study on implementation, under the premise of without departing from spirit and scope, the details of any pair of technical solution of the present invention
It is protection scope of the present invention with the modification that form is made.
A method of it is simulated based on liquid phase and calculates coal ash or mixed coal ash melting temperature comprising the steps of:
(1) raw coal is put into Muffle furnace and is prepared into coal ash or mixed coal ash according to GB/T1574-2008.
(2) using x-ray fluorescence instrument measurement coal ash or mixed coal ash composition and its content, and by from greatly to minispread.
(3) start Factsage7.2 Thermodynamic Simulation software and enter Equilib module.
(4) FactPS and FTxoid database is selected, inputs what coal ash or mixed coal is grey in the box of Reactants
Preceding 10 kinds of ingredients and its mass fraction.
(5) setting initial temperature is 820 DEG C, and outlet temperature is 1500 DEG C, and 20 DEG C are an interval, and setting pressure is one
Standard atmospheric pressure.
(6) FTxoid-SLAGA are selected to be calculated, obtains the liquid phase quality point of coal ash at each temperature or mixed coal ash
Number, setting temperature are abscissa, and liquid phase quality score is ordinate, draw line chart.
(7) changed by liquid phase generating rate and determine four sections, the point of interface in four sections is followed successively by coal from low to high
Deformation temperature, softening temperature and the flowing temperature of ash or mixed coal ash；The liquid phase rate of rise in second section is in 0.6-
0.8%/DEG C, temperature corresponding to the beginning and terminal position in the section is determined as the deformation temperature of coal ash or mixed coal ash, softening temperature
Degree；Temperature corresponding to 4th section beginning is determined as the flowing temperature of coal ash or mixed coal ash, at this time coal ash or mixed coal ash liquid phase
Content reaches peak and no longer changes.
Embodiment 1
Using Shanxi coal ash as research object, the method according to the invention predicts its grey melting temperature.Table 1 is Shanxi coal ash
Pass through the relationship between the Factsage7.2 Thermodynamic Simulation software liquid content being calculated and melting temperature.
Fig. 1 is shanxi coal ash liquid content and melting temperature relational graph.As shown in Figure 1, Shanxi coal ash generates the mistake of liquid phase
Journey can be divided into four-stage, and for first stage in 1040 DEG C to 1100 DEG C sections of temperature, 1040 DEG C of whens start liquid phase occur,
Liquid content reaches 26.2% when to 1100 DEG C, it is average it is every increase 1 DEG C, liquid content increases by 0.4 percentage.Second stage exists
Between 1100 DEG C to 1180 DEG C, which can be considered coal ash deformation stage, and average every 1 DEG C of raising, liquid content increases by 0.7%, should
A stage liquid content speedup upper stage is faster.Phase III, the section included coal in 1180 DEG C to 1280 DEG C sections
The hemispherical fusion temperature of ash, the stage liquid phase formation speed is relatively slow, and liquid content speedup is only 0.1%/DEG C.Fourth stage is at 1280 DEG C
After, liquid content is held essentially constant, which is fully converted to liquid phase.Wherein a two-stage intersection (point 1) is right
1100 DEG C of the temperature answered is identical as coal ash deformation temperature DT, 1180 DEG C of the corresponding temperature of two or three stage intersections (point 2) and softening
Temperature ST is close, and 1280 DEG C of corresponding temperature of three or four stage intersections (point 3), close to 1262 DEG C of flowing temperature of coal ash.By mountain
Western coal ash melting temperature measured value and predicted value carry out deviation evaluation, the results are shown in Table 2.
Embodiment 2
Using Fujian coal ash as research object, the method according to the invention predicts its grey melting temperature.Table 3 is Fujian coal ash
Pass through the relationship between the Factsage7.2 Thermodynamic Simulation software liquid content being calculated and melting temperature.
Fig. 2 is Fujian coal ash liquid content and melting temperature relational graph.As seen from Figure 2, the liquid phase of Fujian coal ash becomes
Change situation is similar with Shanxi coal ash, but the temperature range of its liquid phase generation first stage is longer, is located at 900 DEG C to 1120 DEG C models
In enclosing, the liquid content speedup in the stage is only 0.1%/DEG C, second stage is Fujian in 1120 DEG C to 1200 DEG C sections
The deformation stage of coal ash, liquid content speedup reaches 0.7%/DEG C, the phase III is distributed in 1200 DEG C to 1280 DEG C, liquid content
Average speedup be also only 0.1%/DEG C, after 1280 DEG C, liquid content is held essentially constant fourth stage, the stage coal ash
It is fully converted to liquid phase.As seen from the figure, corresponding 1120 DEG C of the temperature deformations close to Fujian coal ash of a two-stage intersection (point 1)
1138 DEG C of temperature, corresponding 1200 DEG C of temperature of two or three stage intersection points (point 2) are close with softening temperature ST, and three or four stage intersections
(point 3) in 1280 DEG C, close to 1303 DEG C of flowing temperature of coal ash.Fujian coal ash melting temperature measured value and predicted value are carried out inclined
Difference evaluation, the results are shown in Table 4.
Embodiment 3
Inner Mongol coal ash and Shanxi coal ash 1:1 in mass ratio are subjected to interworking and obtain mixed coal ash 1.It is research object with mixed coal ash 1, presses
Its grey melting temperature is predicted according to method of the invention.Table 5 is that mixed coal ash 1 is soft by Factsage7.2 Thermodynamic Simulation
Relationship between the liquid content that part is calculated and melting temperature.
Fig. 3 is grey 1 liquid content of mixed coal and melting temperature relational graph.As seen from Figure 3, the liquid phase of mixed coal ash 1 generates
Four-stage can also be divided into, four-stage is located at (1080 DEG C, 1140 DEG C), (1140 DEG C, 1200 DEG C), (1200 DEG C, 1280
DEG C) and (1280, ∞) four sections.The liquid content of mixed coal ash 1 in the first stage speedup be only 0.2%/DEG C, second stage
Reach 0.7%/DEG C, the phase III be averaged speedup be 0.3%/DEG C, after 1280 DEG C, liquid content is kept not fourth stage substantially
Become, which is fully converted to liquid phase.The DT of mixed coal ash 1 is 1135 DEG C, the boundary temperature (point 1) of this and the first two stage
It is close, and 1200 DEG C of two triphasic boundary temperature (point 2) are then close to 1186 DEG C of the softening temperature of coal ash, and three or four stages handed over
Point (point 3) is close to 1264 DEG C of flowing temperature of mixed coal ash 1.The grey 1 melting temperature measured value of mixed coal and predicted value are carried out deviation to comment
Valence the results are shown in Table 6.
Embodiment 4
Guizhou coal ash and Ningxia coal ash 1:1 in mass ratio are subjected to interworking and obtain mixed coal ash 2.It is research object with mixed coal ash 2, presses
Its grey melting temperature is predicted according to method of the invention.Table 7 is that mixed coal ash 2 is soft by Factsage7.2 Thermodynamic Simulation
Relationship between the liquid content that part is calculated and melting temperature.
Fig. 4 is grey 2 liquid contents of mixed coal and melting temperature relational graph.As shown in Figure 4, the liquid phase generation of mixed coal ash 2 can also
It is divided into four-stage, the DT of mixed coal ash 2 is 1104 DEG C, this is close with the boundary temperature (point 1) in the first two stage, and two or three stages
1220 DEG C of boundary temperature (point 2) be then 1231 DEG C close to the softening temperature of coal ash, the corresponding temperature of three or four stage intersection points (point 3)
Spend 1315 DEG C of flowing temperature close to coal ash.The grey melting temperature measured value of mixed coal ash 2 and predicted value are subjected to deviation evaluation, as a result
It is shown in Table 8.
Claims (5)
1. a kind of simulate the method for calculating coal ash and mixed coal ash melting temperature based on liquid phase, which is characterized in that comprise the steps of:
(1) raw coal is put into Muffle furnace and is prepared into coal ash or flyash；
(2) coal ash composition and its mass fraction are measured, and by arranging from big to small；
(3) the preceding 10 kinds of ingredients and its mass fraction of coal ash or mixed coal ash are inputted in software for calculation, temperature, pressure is calculated
When reaching equilibrium state, the liquid content score of coal ash or mixed coal ash；
(4) setting temperature is abscissa, and liquid phase quality score is ordinate, draws line chart；
(5) changed from line chart figure by liquid phase generating rate and determine four sections, then coal is determined by the point of interface in section
Deformation temperature, softening temperature and the flowing temperature of ash or mixed coal ash, predict the characteristic temperature of coal ash.
2. a kind of method that calculating coal ash or mixed coal ash melting temperature are simulated based on liquid phase according to claim 1,
It is characterized in that: using x-ray fluorescence instrument measurement coal ash or mixed coal ash component and its content in step (2).
3. a kind of method that calculating coal ash or mixed coal ash melting temperature are simulated based on liquid phase according to claim 1,
Be characterized in that: software for calculation is FactSage software in step (3), uses Equilib module to be calculated, design conditions
Are as follows: initial temperature is 820 DEG C, and outlet temperature is 1500 DEG C, and 20 DEG C are an interval, and pressure is a standard atmospheric pressure.
4. a kind of method that calculating coal ash or mixed coal ash melting temperature are simulated based on liquid phase according to claim 1,
Be characterized in that: in step (5), the point of interface in four sections be followed successively by from low to high coal ash or mixed coal ash deformation temperature (DT),
Softening temperature (ST) and flowing temperature (FT).
5. a kind of method that calculating coal ash or mixed coal ash melting temperature are simulated based on liquid phase according to claim 1,
Be characterized in that: in step (5) the liquid phase rate of rise in second section 0.6-0.8%/DEG C, the beginning in the section and end position
It sets corresponding temperature and is determined as the deformation temperature of coal ash or mixed coal ash, softening temperature；Temperature corresponding to 4th section beginning
It is determined as the flowing temperature of coal ash or mixed coal ash, coal ash or mixed coal ash liquid content reach peak and no longer change at this time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910410563.0A CN110148439A (en) | 2019-05-16 | 2019-05-16 | A method of it is simulated based on liquid phase and calculates coal ash or mixed coal ash melting temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910410563.0A CN110148439A (en) | 2019-05-16 | 2019-05-16 | A method of it is simulated based on liquid phase and calculates coal ash or mixed coal ash melting temperature |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110148439A true CN110148439A (en) | 2019-08-20 |
Family
ID=67595686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910410563.0A Pending CN110148439A (en) | 2019-05-16 | 2019-05-16 | A method of it is simulated based on liquid phase and calculates coal ash or mixed coal ash melting temperature |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110148439A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111662570A (en) * | 2020-05-25 | 2020-09-15 | 武汉科技大学 | Mixed spinel type black ceramic pigment and preparation method thereof |
| CN113254852A (en) * | 2021-05-25 | 2021-08-13 | 鞍钢股份有限公司 | Method for predicting fusion temperature energy of coal ash for blast furnace injection |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090125144A1 (en) * | 2007-11-09 | 2009-05-14 | Riley John T | Method and apparatus for the calculation of coal ash fusion values |
| CN103060054A (en) * | 2013-01-28 | 2013-04-24 | 中国矿业大学 | Method for adjusting and controlling melting temperature of coal ash by combining coal blending with auxiliary agent |
| CN107884430A (en) * | 2017-11-10 | 2018-04-06 | 菏泽学院 | A kind of method of the carbonaceous material ash melting temperature such as forecasting coal |
| CN108018109A (en) * | 2017-12-18 | 2018-05-11 | 福州大学 | A kind of compound resistance flux for improving low ash smelting point coal ash melting temperature |
-
2019
- 2019-05-16 CN CN201910410563.0A patent/CN110148439A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090125144A1 (en) * | 2007-11-09 | 2009-05-14 | Riley John T | Method and apparatus for the calculation of coal ash fusion values |
| CN103060054A (en) * | 2013-01-28 | 2013-04-24 | 中国矿业大学 | Method for adjusting and controlling melting temperature of coal ash by combining coal blending with auxiliary agent |
| CN107884430A (en) * | 2017-11-10 | 2018-04-06 | 菏泽学院 | A kind of method of the carbonaceous material ash melting temperature such as forecasting coal |
| CN108018109A (en) * | 2017-12-18 | 2018-05-11 | 福州大学 | A kind of compound resistance flux for improving low ash smelting point coal ash melting temperature |
Non-Patent Citations (3)
| Title |
|---|
| 于萍: "《电厂化学》", 31 January 2009 * |
| 刘硕等: "煤灰熔融温度预测方法研究现状", 《洁净煤技术》 * |
| 李平等: "FactSage软件应用于预测煤灰熔融流动温度", 《锅炉技术》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111662570A (en) * | 2020-05-25 | 2020-09-15 | 武汉科技大学 | Mixed spinel type black ceramic pigment and preparation method thereof |
| CN113254852A (en) * | 2021-05-25 | 2021-08-13 | 鞍钢股份有限公司 | Method for predicting fusion temperature energy of coal ash for blast furnace injection |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Song et al. | Fusibility and flow properties of coal ash and slag | |
| CN109583585B (en) | Construction method of power station boiler wall temperature prediction neural network model | |
| CN110148439A (en) | A method of it is simulated based on liquid phase and calculates coal ash or mixed coal ash melting temperature | |
| CN101463407B (en) | Method for calculating converter steel melting lime adding amount | |
| Tsuruda et al. | Viscosity measurement and prediction of gasified and synthesized coal slag melts | |
| Rushdi et al. | Mechanistic prediction of ash deposition in a pilot-scale test facility | |
| Dai et al. | Viscosity temperature properties from molecular dynamics simulation: The role of calcium oxide, sodium oxide and ferrous oxide | |
| Whittaker et al. | An analysis of modern creep lifing methodologies in the titanium alloy Ti6-4 | |
| Song et al. | Rheological evolution and crystallization response of molten coal ash slag at high temperatures | |
| CN112992291B (en) | High-temperature electrical grade magnesium oxide powder batching optimization method | |
| Fu et al. | A modified θ projection model for constant load creep curves-I. Introduction of the model | |
| CN107884430B (en) | Method for predicting ash fusion temperature of carbonaceous materials such as coal | |
| CN105238427B (en) | A kind of blending method for reducing accurate eastern coal slagging properties | |
| US10185792B2 (en) | Method for predicting slagging production position and slagging production possibility in furnace | |
| Aldi et al. | Gas turbine fouling: a comparison among 100 heavy-duty frames | |
| CN101792607A (en) | Method for selecting fire retardant based on grey correlation analysis | |
| KR101100589B1 (en) | Method for predicting of coke strength after reaction | |
| Niu et al. | Investigation on ash fusion and slagging properties of coal under reducing atmosphere | |
| CN107045658A (en) | A kind of Forecasting Methodology of coal ash viscosity-temperature characteristic | |
| Wendner et al. | Model B3. 1 for multi-decade concrete creep and shrinkage: Calibration by combined laboratory and bridge data | |
| Peiying et al. | A new turbulent prandtl number model for forced fully-developed pipe heat transfer of liquid metals | |
| KR20200077740A (en) | Method for simulating combustion space condition of blast furnace and apparatus thereof | |
| Jak et al. | The prediction and representation of phase equilibria and physicochemical properties in complex slag systems | |
| CN113743035B (en) | Method for simulating melt-separation red mud fiber forming system structural stability based on molecular dynamics | |
| CN110750911A (en) | Blast furnace slag physical property analysis method and analysis system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190820 |