CN106675657A - Method for regulating and controlling flowing temperature of high-melting-point coal ash - Google Patents
Method for regulating and controlling flowing temperature of high-melting-point coal ash Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/46—Gasification of granular or pulverulent flues in suspension
- C10J3/466—Entrained flow processes
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0903—Feed preparation
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0913—Carbonaceous raw material
- C10J2300/093—Coal
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0983—Additives
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Abstract
The invention discloses a method for regulating and controlling the flowing temperature of high-melting-point coal ash. The method comprises the following steps: measuring the ash melting point of a type of coal of which the coal ash is lower than 25 percent and the Al2O3 content in the ash is lower than 40 percent, blending a type of coal, of which the coal ash FT is larger than 1,400 DEG C since A/B is larger than 4.3, with one or more types of coal according to different masses, so that the coal ash A/B of the blended coal is less than 4.3, then ashing the blended coal, measuring blended coal ash FT, and directly using the blended coal ash if the blended coal ash FT satisfies the ideal operation temperature of a gasifying furnace; if the blended coal ash FT does not satisfy the ideal operation temperature of the gasifying furnace, further regulating and controlling the coal ash by adding an assistant. By adopting the method, the adaptability of the high-melting-point coal ash to a gasifying process of an entrained flow bed is improved, the calorific value of the blended coal is ensured, and meanwhile the adding amount of the assistant is reduced.
Description
Technical field
The invention belongs to coal entrained flow gasification field, more particularly to a kind of side of regulation and control high-melting-point coal ash flowing temperature
Method.
Background technology
It is well known that Chinese oil-poor, few gas, the energy resource structure of relatively rich coal so that general layout of the China based on coal is long-term
Will not change.Coal belongs to the high pollution energy compared to oil, natural gas, is the road of the future development of this coal, it is necessary to high
Science and technology, the road of low stain, wherein coal gasification are to realize " tap " and basis that Coal Clean is utilized.Entrained flow bed gasification technology
Because its output is big, high conversion rate the advantages of as following main developing direction.Requirement one of the airflow bed gasification furnace to ash content
As between 5%-25%, and operation temperature is general at 1400-1600 DEG C, the gasification furnace of different type of furnaces constructions and mode of operation,
There is some difference for requirement to coal ash flowing temperature (FT), but its slag tap technique, it is desirable to FT at least below 1400 DEG C,
And coals of China coal ash FT more than 1400 DEG C accounts for 57% of total amount or so, therefore need badly the melting characteristic of high-melting-point coal ash is added
To improve.Under 1400-1600 DEG C of operating environment, FT relatively low coal ash, the mobility after its melting increases airflow bed gasification furnace
By force, to refractory brick erosion and osmosis is obvious, causes the service life of refractory brick to substantially reduce.Research shows, gasification furnace
Operation temperature it is ideal higher than coal ash FT 50-100 DEG C, therefore based on coal ash itself component, " closed by different
Key component " mouses out the rich region of coal ash FT, has important practical significance.
Current research shows, when the acidic components in coal ash are more, the melt temperature of coal ash is higher, and when in coal ash
Al2O3When content is higher than 40%, its FT is difficult regulation and control to less than 1400 DEG C；When basic component in coal ash is more, the melting of coal ash
Temperature is relatively low.Improve the common method of coal ash at this stage for coal blending or use basic mineral salt assitant.Use coal blending
Mode, the difference of each component content in the content of ashes of Coal rank and ash is limited by, it is difficult to disposably determine ideal
Chlorine adding ratio.Using basic mineral salt assitant, the direct increase of coal ash content of ashes can be caused again, in identical operating condition
Under, coal ash ash content often increases by 1%, and oxygen consumption increases 0.7%-0.8%, while coal consumption increases 1.3%-1.5%.
A kind of auxiliary agent for reducing coal ash melting temperature is disclosed in patent CN 101580751A.Main contents are：30-60
The SiO of part different proportion2、CaO、Fe2O3, MgO and add a certain amount of Al on this basis2O3、Na2O、K2O, preparation is answered
Close auxiliary agent.But this auxiliary agent suitable coal and amount ranges are not specified simultaneously；For the regulation and control of Coal rank, the blending group of its auxiliary agent
Divide and addition is different so that preparing for auxiliary agent is relatively complicated.
A kind of method for reducing coal ash melting temperature is disclosed in patent CN 105542901A.Main contents are：Addition
CaO、MgO、Fe2O3One or more, or addition can decomposite CaO, MgO, Fe2O3At least one salt.The patent is only used
The mode of auxiliary agent is added, the requirement for reducing coal ash melting temperature is reached, but directly increases pit ash content, in turn resulted in
The reduction of caloric value, indirectly increased energy consumption during coal gasification.
A kind of flux for reducing coal ash melting temperature is disclosed in patent CN105199811A, main contents are：Three
Plant in coal ash of the FT higher than 1500 DEG C, reduced by adding the alkali flux (lime stone, calcite, mica) of different quality
Coal ash FT.The patent is only studied based on three kinds of high-melting-point coal ash, and its representativeness shows slightly not enough, and in regulation and control coal ash
During FT, carried out by way of adding ore class flux, while coal ash FT is reduced, also increased ash content, dropped
The low caloric value of coal.
The content of the invention
To overcome problems of the prior art, the present invention to provide a kind of side of regulation and control high-melting-point coal ash flowing temperature
Method, the method reduce energy consumption, and method is easy, it is ensured that the caloric value of mixed coal.
To achieve the above object, the present invention adopts the following technical scheme that,
A kind of method of regulation and control high-melting-point coal ash flowing temperature, to coal ash less than Al in 25%, ash2O3Content is less than 40%
Coal, ash fusion point measure is carried out, to because of A/B>The 4.3 coal ash FT for causing>1400 DEG C of coal, using one or more coal with
The coal carries out coal blending according to different quality so that the coal ash A/B of Mixture Density Networks<4.3, ashing treatment then is carried out to Mixture Density Networks,
Blended coal ash FT is determined, if blended coal ash FT meets the ideal operating temperatures of gasification furnace, is directly used；Wherein, A/B is in formula
The soda acid ratio of coal ash, and A/B=(SiO2+Al2O3+TiO2)/(CaO+Fe2O3+MgO)；
If blended coal ash FT is unsatisfactory for the ideal operating temperatures of gasification furnace, it is divided into following 3 kinds of situations, traveling one is entered to coal ash
The regulation and control of step：
1) as 1.0≤A/B<When 3.0, add acid additive or add alkaline assistant further to regulate and control to coal ash FT, make
Obtain 0.30≤Al2O3/(CaO+Fe2O3)<0.85, now FT=1215 ± 55 DEG C；Or cause 0.85≤Al2O3/(CaO+Fe2O3)<
1.50, now FT=1335 ± 40 DEG C；
2) as 3.0≤A/B<When 4.3, alkaline assistant is added so that 1.00≤SiO2/Al2O3<2.30, now FT=1350
± 60 DEG C, or cause 2.30≤SiO2/Al2O3<3.20, now FT=1255 ± 35 DEG C；
3) as 3.0≤A/B<4.3, and 1.00≤SiO2/Al2O3<3.20 when, if FT>1400 DEG C, then alkaline assistant is added,
So that 3.0≤A/B<3.5, now coal ash FT meet slag tap technique to FT<1400 DEG C of requirement.
Further improvement of the invention is that the acid additive is SiO2、Al2O3In one or more or kaolin.
Further improvement of the invention is that the alkaline assistant is CaO, Fe2O3, MgO one or more or carbonic acid
One or more in calcium, ferric carbonate, magnesium carbonate.
Compared with prior art, the device have the advantages that being：
(1) present invention for acidic components in coal ash it is more when be coal ash A/B>When 4.3, caused FT>1400 DEG C
Coal, has highlighted specific aim of the invention.
(2) by the way of coal separation-coal blending or coal separation-coal blending-addition auxiliary agent, the FT to high-melting-point coal ash enters the present invention
Row regulation and control, on the premise of entrained flow gasification technological requirement is met, had both widened the coal suitable for entrained flow gasification, reduced again
The addition of auxiliary agent, it is ensured that the caloric value of mixed coal, so the present invention has stronger application.
(3) present invention is not only main control measures to adjust A/B, and according to coal ash acid, alkaline constituents in high temperature
Under action effect, be partitioned into the A/B of different range, mouse out in 1.0≤A/B<When 3.0, the leading factor of influence coal ash FT
It is Al2O3/(CaO+Fe2O3), 3.0≤A/B<When 4.3, the leading factor of influence coal ash FT is SiO2/Al2O3, and then cause mixed
The extent of alternating temperature control of coal ash FT is closed in FT ± 60 DEG C, under easy manipulation technique, " enrichment " of coal ash FT is realized, so
The present invention has ease for operation.
Further, auxiliary agent used in the present invention, not only cheap, raw material extensively, and it is simple and easy to apply, be easy to behaviour
Make.
Brief description of the drawings
Fig. 1 is the process chart of present invention regulation and control coal ash FT.
Fig. 2 is influences of the coal ash A/B to coal ash FT.
Fig. 3 is as 1.0≤A/B<When 3.0, Al2O3/(CaO+Fe2O3) influence to FT.
Fig. 4 is as 3.0≤A/B<When 4.3, SiO2/Al2O3Influence to FT.
Specific embodiment
The present invention is described in detail below in conjunction with the accompanying drawings.
The temperature when ideal operating temperatures of gasification furnace of the present invention is higher than 50-100 DEG C of coal ash flowing temperature.
The present invention is comprised the following steps, and detailed process is referring to Fig. 1：
(1) Industrial Analysis is carried out to coal, and is ashed treatment, carried out ash analysis and A/B and analyze, determine ash content whether be higher than
25%th, Al in ash2O3Whether content is higher than 40%；
(2) to coal ash less than Al in 25%, ash2O3Coal of the content less than 40%, carries out ash fusion point measure, to because of A/B>
The 4.3 coal ash FT for causing>1400 DEG C of coal, i.e. relational expression 3, result of study refers to Fig. 2, using with the acid of its coal ash, alkaline group
Divide one or more coal of significant difference, according to the relation of A/B in relational expression 1-2 and FT to instruct, matched somebody with somebody with different mass ratioes
Coal, adjusts the FT of coal ash, and then Mixture Density Networks are carried out with ashing treatment, the FT of blended coal ash is determined, to blended coal ash FT after coal blending
Meet the ideal operating temperatures of gasification furnace, then directly use.
Relational expression 1：1.0≦A/B<3.0,1160<FT<1375℃；
Relational expression 2：3.0≦A/B<4.3,1220<FT<1410℃；
Relational expression 3：A/B≤4.3, FT>1400℃
A/B is the soda acid ratio of coal ash, A/B=(SiO in formula2+Al2O3+TiO2)/(CaO+Fe2O3+ MgO), i.e. SiO2、
Al2O3And TiO2Gross mass percentage and CaO, Fe2O3And the ratio of MgO gross mass percentages；
(3) ideal operating temperatures of gasification furnace is still unsatisfactory for blended coal ash FT after coal blending, to influence coal ash to melt temperature
The key factor of degree is regulation and control foundation, is regulated and controled again by the way of auxiliary agent is added.Regulation and control auxiliary agent is divided into acid additive and alkalescence
Auxiliary agent；Acid additive is SiO2、Al2O3One or more, or rich in SiO2、Al2O3Mineral, such as：Kaolin etc.；Alkalescence
Auxiliary agent is CaO, Fe2O3, one or more of MgO, or CaO, Fe can be decomposited at high temperature2O3, MgO this type oxide
Mineral, such as：Calcium carbonate, ferric carbonate, magnesium carbonate etc..
(4) when 1.0<A/B<When 4.3, using segmentation A/B, coordinate the mode of influence coal ash melting temperature key factor, enter
Row research.Research finds, when 1.0<A/B<When 3.0, coal ash FT and Al2O3/(CaO+Fe2O3) mass values have larger association,
Result of study refers to Fig. 3；When 3.0<A/B<When 4.3, coal ash FT and SiO2/Al2O3Mass values have a larger association, research knot
Fruit refers to Fig. 4.
1) as 1.0≤A/B<When 3.0, add acid additive or add alkaline assistant further to regulate and control to coal ash FT, make
Obtain 0.30≤Al2O3/(CaO+Fe2O3)<0.85, now FT=1215 ± 55 DEG C；Or cause 0.85≤Al2O3/(CaO+Fe2O3)<
1.50, now FT=1335 ± 40 DEG C；
2) as 3.0≤A/B<When 4.3, alkaline assistant is added so that 1.00≤SiO2/Al2O3<2.30, now FT=1350
± 60 DEG C, or cause 2.30≤SiO2/Al2O3<3.20, now FT=1255 ± 35 DEG C；
3) as 3.0≤A/B<4.3, and 1.00≤SiO2/Al2O3<When 3.20, if FT>1400 DEG C, then alkaline assistant is added,
So that 3.0≤A/B<3.5, now coal ash FT meet slag tap technique to FT<1400 DEG C of requirement.
It is specifically shown in formula below：
I：
II：
III：II- 1. under the conditions of, if FT>1400 DEG C, alkaline assistant is added, by coal ash A/B controls in 3.0≤A/B<3.5
Below by specific implementation case, the present invention is described in detail.
Embodiment 1
(1) typical high-melting-point Jincheng Anthracite (JC) and low melting point Xiangyang coal (XY) are chosen, Industrial Analysis, coal ash is carried out
In the analysis of various constituent contents, whether analyze its ash content higher than 25%, Al2O3Whether content is higher than 40%.Through two kinds of Industrial Analysis
Pit ash is respectively less than 25%, Al2O3Content is less than 40%.
(2) A/B of different ratio is calculated according to ash analysis result, the results detailed in Table 1.
The Xiangyang coal of table 1 and Jincheng Anthracite Mixture Density Networks ash analysis
| Project | SiO2 | A12O3 | Fe2O3 | CaO | MgO | TiO2 | A/B |
| JC | 47.00 | 33.55 | 7.99 | 5.16 | 1.60 | 0.85 | 5.52 |
| 10%XY | 45.75 | 31.04 | 8.85 | 7.00 | 1.71 | 0.84 | 4.42 |
| 20%XY | 44.43 | 30.45 | 9.76 | 8.94 | 1.82 | 0.83 | 3.69 |
| 30%XY | 43.05 | 28.79 | 10.7 | 10.97 | 1.94 | 0.82 | 3.08 |
| 40%XY | 41.60 | 27.04 | 11.71 | 13.1 | 2.01 | 0.81 | 2.59 |
| 50%XY | 40.08 | 25.2 | 12.75 | 15.35 | 2.20 | 0.81 | 2.18 |
| XY | 31.06 | 14.32 | 18.95 | 28.62 | 2.98 | 0.74 | 0.91 |
Note：10%, 20%, 30%, 40%, 50% represents in 10%XY, 20%XY, 30%XY, 40%XY, 50%XY
The mass percent of the XY of addition.
(3) it is guidance with the corresponding temperature ranges of A/B in above-mentioned relational expression 1-3, according to mass percent, respectively in JC
The XY of different quality is added, mixing coal sample is prepared, the size controlling of coal sample is in below 0.1mm.
Mixture Density Networks carry out ashing treatment respectively at 815 DEG C, take out the ash sample of different coal sample proportionings, and grey cone is produced respectively,
By ash cone under weakly reducing atmosphere, using intelligent ash MELTING POINT TESTER, corresponding coal ash melting characteristic temperature is determined：Deformation temperature
(DT), softening temperature (ST), hemispherical fusion temperature (HT) and flowing temperature (FT), blended coal ash FT refer to table 2.
Coal ash FT and the relevant parameter analysis of the different ratio of table 2
(4) from table 1, table 2, the A/B of JC, 10%XY is all higher than the 4.3 and FT that determines more than 1400 DEG C, this experiment knot
Fruit demonstrates the feasibility of relational expression 3；When XY coals percent mass ratio is 20%, 30% in mixed coal, its coal ash A/B is 3.0
≦A/B<Between 4.3, the FT of measure is respectively 1404 DEG C, 1360 DEG C, in 1220-1410 DEG C of scope, this experimental result
Demonstrate the feasibility of relational expression 2；When XY coals ratio is 40%, 50% in mixed coal, its coal ash A/B is in 1.0≤A/B<3.0 it
Between, the FT of measure is respectively 1368 DEG C, 1330 DEG C, and in 1160-1375 DEG C of scope, this experimental result also demonstrates relational expression
1 feasibility.Technological requirement is met to blended coal ash FT after coal blending, be can be used directly；It is discontented to blended coal ash FT after coal blending
Sufficient technological requirement, then regulated and controled again by the way of auxiliary agent is added.
Obviously to the mixed coal that XY coal ratios are 20%, FT=1404 DEG C of its blended coal ash>1400 DEG C, having exceeded the upper limit will
Ask, but only exceed 4 DEG C, therefore be finely adjusted by the way of alkaline assistant is added.Auxiliary agent is divided into acid additive (SiO2、Al2O3
Or kaolin etc. contains SiO2、Al2O3More mineral) and alkaline assistant (CaO, Fe2O3, MgO or can decomposite CaO,
Fe2O3, this kind of materials of MgO easy decomposition salt), specific control manipulation is as follows：
I：
II：
III：If II- 1. under the conditions of, FT>1400 DEG C, add alkaline assistant so that 3.0≤A/B<3.5
The 1.0%~5.0% of grey base (20%XY) quality CaO is added using relational expression III, again by blended coal ash
A/B regulates and controls to 3.0≤A/B<3.5 scope, makes its FT<1400℃.As a example by adding grey base 2.0%CaO, its A/B is down to
3.36, FT=1382 DEG C of the coal ash of measure reaches target.
Embodiment 2
(1) typical high-melting-point Jincheng Anthracite (JC) and Shenhua direct coal liquefaction residue (DCLR) are chosen, industry is carried out
Whether various constituent content analyses in analysis, coal ash, analyze its ash content higher than 25%, Al2O3Whether content is higher than 40%.Through work
The ash content that industry analyzes two kinds of samples is respectively less than 25%.
(2) A/B of different ratio is calculated according to ash analysis result, the results detailed in Table 3.
The Shenhua direct coal liquefaction residue of table 3 and Jincheng Anthracite Mixture Density Networks ash analysis
| Project | SiO2 | A12O3 | Fe2O3 | CaO | MgO | TiO2 | A/B |
| JC | 47.00 | 33.55 | 7.99 | 5.16 | 1.60 | 0.85 | 5.52 |
| 10%DCLR | 44.86 | 31.54 | 9.47 | 6.00 | 1.55 | 0.95 | 4.55 |
| 20%DCLR | 42.64 | 29.45 | 11.00 | 6.87 | 1.49 | 1.05 | 3.78 |
| 30%DCLR | 40.33 | 27.27 | 12.60 | 7.77 | 1.43 | 1.16 | 3.15 |
| 40%DCLR | 37.93 | 25.02 | 14.25 | 8.71 | 1.37 | 1.27 | 2.64 |
| 50%DCLR | 35.44 | 22.67 | 15.98 | 9.69 | 1.31 | 1.39 | 2.21 |
| DCLR | 21.30 | 9.37 | 25.74 | 15.23 | 0.95 | 2.05 | 0.78 |
Note：10% in 10%DCLR, 20%DCLR, 30%DCLR, 40%DCLR, 50%DCLR, 20%, 30%, 40%,
The mass percent of 50% DCLR for representing addition.
(3) it is guidance with the corresponding temperature ranges of A/B in above-mentioned relational expression 1-3, according to mass percent, respectively in JC
The DCLR of different quality is added, mixing coal sample is prepared, the size controlling of coal sample is in below 0.1mm.
Mixture Density Networks carry out ashing treatment respectively at 815 DEG C, take out the ash sample of different coal sample proportionings, and grey cone is produced respectively,
By ash cone under weakly reducing atmosphere, using intelligent ash MELTING POINT TESTER, corresponding coal ash melting characteristic temperature is determined：Deformation temperature
(DT), softening temperature (ST), hemispherical fusion temperature (HT) and flowing temperature (FT), blended coal ash FT refer to table 4.
Coal ash FT and the relevant parameter analysis of the different ratio of table 4
(4) from table 3, table 4, the A/B of JC, 10%DCLR is all higher than the 4.3 and FT that determines more than 1400 DEG C, this experiment
The result verification feasibility of relational expression 3；When DCLR mass ratios are 20%, 30% in mixed coal, its coal ash A/B 3.0≤
A/B<Between 4.3, the FT of measure is respectively 1408 DEG C, 1384 DEG C, and in 1220-1410 DEG C of scope, this experimental result is also tested
The feasibility of relational expression 2 is demonstrate,proved；When DCLR ratios are 40%, 50% in mixed coal, its coal ash A/B is in 1.0≤A/B<3.0 it
Between, the FT of measure is respectively 1372 DEG C, 1332 DEG C, and in 1160-1375 DEG C of scope, this experimental result also demonstrates relational expression
1 feasibility.Technological requirement is met to blended coal ash FT after coal blending, be can be used directly；It is discontented to blended coal ash FT after coal blending
Sufficient technological requirement, then regulated and controled again by the way of auxiliary agent is added.
Obviously to the mixed coal that DCLR accountings are 20%, FT=1408 DEG C of its blended coal ash>1400 DEG C, having exceeded the upper limit will
Ask, but only exceed 8 DEG C, therefore be finely adjusted by the way of alkaline assistant is added.Auxiliary agent is divided into acid additive (SiO2、Al2O3
Or kaolin etc. contains SiO2、Al2O3More mineral) and alkaline assistant (CaO, Fe2O3, MgO or can decomposite CaO,
Fe2O3, this kind of materials of MgO easy decomposition salt), specific control manipulation is as follows：
I：
II：
III：If II- 1. under the conditions of, FT>1400 DEG C, add alkaline assistant so that 3.0≤A/B<3.5
The 1.6%~5.1% of grey base (20%DCLR) quality CaO is added using relational expression III, again by blended coal ash
A/B regulate and control to 3.0≤A/B<3.5 scope, makes its FT<1400℃.As a example by adding grey matrix amount 3.0%CaO, its A/B
3.27 are down to, FT=1378 DEG C of the coal ash of measure reaches target.
Claims (3)
1. it is a kind of regulate and control high-melting-point coal ash flowing temperature method, it is characterised in that：To coal ash less than Al in 25%, ash2O3Content
Coal less than 40%, carries out ash fusion point measure, to because of A/B>The 4.3 coal ash FT for causing>1400 DEG C of coal, using a kind of or
Various coals carry out coal blending with the coal according to different quality so that the coal ash A/B of Mixture Density Networks<4.3, ash then is carried out to Mixture Density Networks
Change is processed, and determines blended coal ash FT, if blended coal ash FT meets the ideal operating temperatures of gasification furnace, is directly used；Wherein, formula
Middle A/B is the soda acid ratio of coal ash, and A/B=(SiO2+Al2O3+TiO2)/(CaO+Fe2O3+MgO)；
If blended coal ash FT is unsatisfactory for the ideal operating temperatures of gasification furnace, it is divided into following 3 kinds of situations, coal ash is carried out further
Regulation and control：
1) as 1.0≤A/B<When 3.0, add acid additive or add alkaline assistant further to regulate and control to coal ash FT so that
0.30≦Al2O3/(CaO+Fe2O3)<0.85, now FT=1215 ± 55 DEG C；Or cause 0.85≤Al2O3/(CaO+Fe2O3)<
1.50, now FT=1335 ± 40 DEG C；
2) as 3.0≤A/B<When 4.3, alkaline assistant is added so that 1.00≤SiO2/Al2O3<2.30, now FT=1350 ± 60
DEG C, or cause 2.30≤SiO2/Al2O3<3.20, now FT=1255 ± 35 DEG C；
3) as 3.0≤A/B<4.3, and 1.00≤SiO2/Al2O3<When 3.20, if FT>1400 DEG C, then add alkaline assistant so that
3.0≦A/B<3.5, now coal ash FT meet slag tap technique to FT<1400 DEG C of requirement.
2. it is according to claim 1 regulation and control high-melting-point coal ash flowing temperature method, it is characterised in that：The acid additive
It is SiO2、Al2O3In one or more or kaolin.
3. it is according to claim 1 regulation and control high-melting-point coal ash flowing temperature method, it is characterised in that：The alkaline assistant
It is CaO, Fe2O3, one or more in one or more of MgO or calcium carbonate, ferric carbonate, magnesium carbonate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611119558.7A CN106675657B (en) | 2016-12-07 | 2016-12-07 | A method of regulation high-melting-point coal ash flowing temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611119558.7A CN106675657B (en) | 2016-12-07 | 2016-12-07 | A method of regulation high-melting-point coal ash flowing temperature |
Publications (2)
| Publication Number | Publication Date |
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| CN108148631A (en) * | 2017-12-22 | 2018-06-12 | 山西晋城无烟煤矿业集团有限责任公司 | A kind of fluxing agent and its adding method for improving coal ash melting property |
| CN108624375A (en) * | 2018-04-20 | 2018-10-09 | 湖北和泰生物能源有限公司 | A kind of environmentally protective biomass granule fuel and preparation method thereof |
| CN109233882A (en) * | 2018-10-31 | 2019-01-18 | 中国矿业大学 | A method of regulation is by the gasification charred ashes fusing point that at high proportion prepared by low-quality coal |
| CN109679705A (en) * | 2019-01-18 | 2019-04-26 | 平泉腾琚非金属矿物制品制造有限公司 | A kind of composite fluxing agent improving coal ash melting property |
| CN112940790A (en) * | 2021-03-10 | 2021-06-11 | 西北大学 | Method for quickly and efficiently regulating and controlling flow temperature of coal ash |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108148631A (en) * | 2017-12-22 | 2018-06-12 | 山西晋城无烟煤矿业集团有限责任公司 | A kind of fluxing agent and its adding method for improving coal ash melting property |
| CN108624375A (en) * | 2018-04-20 | 2018-10-09 | 湖北和泰生物能源有限公司 | A kind of environmentally protective biomass granule fuel and preparation method thereof |
| CN109233882A (en) * | 2018-10-31 | 2019-01-18 | 中国矿业大学 | A method of regulation is by the gasification charred ashes fusing point that at high proportion prepared by low-quality coal |
| CN109679705A (en) * | 2019-01-18 | 2019-04-26 | 平泉腾琚非金属矿物制品制造有限公司 | A kind of composite fluxing agent improving coal ash melting property |
| CN112940790A (en) * | 2021-03-10 | 2021-06-11 | 西北大学 | Method for quickly and efficiently regulating and controlling flow temperature of coal ash |
| CN112940790B (en) * | 2021-03-10 | 2022-06-24 | 西北大学 | Method for quickly and efficiently regulating and controlling flow temperature of coal ash |
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