CN110396448A - It is a kind of modified coal-fired - Google Patents
It is a kind of modified coal-fired Download PDFInfo
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- CN110396448A CN110396448A CN201910630306.8A CN201910630306A CN110396448A CN 110396448 A CN110396448 A CN 110396448A CN 201910630306 A CN201910630306 A CN 201910630306A CN 110396448 A CN110396448 A CN 110396448A
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- coal
- fired
- silica
- aluminum oxide
- ash
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L5/00—Solid fuels
- C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
- C10L5/04—Raw material of mineral origin to be used; Pretreatment thereof
Abstract
The invention discloses a kind of modified coal-fired, by adding kaolin in fire coal, bauxite, lime stone, quartz mine, the solid granulates such as titanium dioxide or powder, control modified coal-fired ash component and content of ashes, make the compound of silicon and aluminium in ash content, it is converted into silica and aluminum oxide calculates, the mass ratio of silica and aluminum oxide is (1.0~4.0): 1, silica and aluminum oxide quality sum account for 40% or more of ash content gross mass, coal-fired slagging can be improved, fouling characteristics, alleviate and avoid the serious slagging of boiler, contamination problems, boiler is improved to the adaptability of fuel.The modified coal-fired ingredient of the present invention is simple, raw materials used cheap and easy to get, has good market prospects.
Description
Technical field
The invention belongs to coal-burning boiler technical fields, and in particular to and it is a kind of modified coal-fired, by adding part in fire coal
Solid mixt adjusts coal-fired ash content and ash component, improves coal-fired slagging, stains performance.
Background technique
In coal-fired power station boiler, coal fines high-temperature burning is a kind of physics~chemical process of complexity, and the ash content in coal is in height
Also complicated physical and chemical reaction can occur under temperature, the compound compared with low melting point can distil, melt, and react with other compounds
Form the new compound of low melting point, these substances can on heating surface by melting, condensation in the form of semi-molten, cohesion, coalescence,
Solid ash particle in fire coal is captured, form the slagging of different shape and adhesion strength on heating surface or stains layer.These slagging
Or contamination layer can directly increase the thermal resistance of heating surface, reduce boiler thermal efficiency, destroy boiler evaporating and overheat heating surface absorption heat
The balance of amount reduces the thermal performance of boiler.In addition, serious slagging, contamination or great security risk, thermal power plant
It occur frequently that due to Serious Slagging, staiing and causing boiler safety accident and unit forced outage.
The composition of coal-fired ash component directly affects the melting characteristic of lime-ash, is the basic influence factor of boiler scaling, contamination.
For the coal-fired power station boiler for having designed, having built, put into effect, once biggish adjustment occurs for fuel, due to fire coal
In mineral composition big variation occurs, boiler heating surface often occurs serious slagging, contamination problems, directly influences pot
The safety of furnace, economy, stable operation.
Pass through research, it is believed that the slagging of burner hearth and the contamination process of convection heating surface are complicated, various factors couplings
Effect, mechanism is different, and the extent of injury also has a long way to go.It only understands mechanism, could propose that effective prevention and control are arranged
It applies.Such as: the compound of K, Na can become ionic state at 800 DEG C or more, evaporate into high-temperature flue gas, can condense when to the cold
On ash particle surface and heating surface surface, become " glue ", bond other ash particles, forms the Serious Slagging being difficult to clean off, is stained with
Dirt directly injures the safe, economic, clean of boiler, stable operation.For another example: Fe often exists in the form of pyrite, in high temperature
Under, due to the difference of atmosphere, the compound that centre generates can be very different.Under aerobic environment, Fe can be changed into2O3、
Fe3O4, under anaerobic conditions, unstable and low-melting FeS, FeO can be changed into, ash fusion point can be greatly reduced, deteriorate knot
Slag, contamination.
Summary of the invention
The purpose of the present invention is aiming at the problem that existing coal-fired easily slagging, staiing, provide one kind can be effectively relieved slagging,
Contamination problems, while the form for improving slagging, staiing layer make slagging, stain the modified fire coal that layer is easy to remove.
For above-mentioned purpose, modified fire coal of the present invention is made of the raw material of following mass percents: coal-fired
80%~98.5%, kaolin 1.5%~20%, bauxite 0%~15%, lime stone 0~8%, quartz mine 0~5%, titanium white
Powder 0~5%, and the modified compound for firing silicon and aluminium in pit ash, are converted into silica and aluminum oxide calculate,
The mass ratio of silica and aluminum oxide is (1.0~4.0): 1, silica and aluminum oxide quality sum account for ash content
40% or more of gross mass.
Modified fire coal of the invention is preferably made of the raw material of following mass percents: fire coal 85%~98%, kaolin
2%~15%, bauxite 0%~10%, lime stone 0~5%, quartz mine 0~4%, titanium dioxide 0~3%, and the modified combustion
The compound of silicon and aluminium in pit ash, is converted into silica and aluminum oxide calculates, silica and aluminum oxide
Mass ratio be (1.3~3.2): 1, silica and aluminum oxide quality sum account for the 50%~80% of ash content gross mass.
Above-mentioned fire coal is the fire coal that is easy or being easier to slagging, contamination on boiler heating surface during high-temp combustion.
The present invention by easy slagging, stain fire coal in add a certain amount of solid matter (kaolin, bauxite etc. at
Point), on the one hand, by increasing the gross mass of ash content in coal, in relative reduction ash on the other hand the content of harmful components passes through
The composition for changing ash content, directly affects the physics~chemical reaction course and product of ash content during fired coal combustion, substantially improves
The form and degree of coal-fired slagging, contamination.Added solid matter is using original mineral easily obtain, not deep processing
Matter reduces costs.The detection method of main compound ingredient and content can be with ash content in fire coal in the solid matter of addition
It is consistent with the detection method of main component.
Test result shows that the modified fire coal of the present invention can be effectively relieved and solve coal-fired slagging and contamination problems, wherein
The function of each ingredient is as follows:
1, necessary chemical reaction substance is provided, the generation of burner hearth low melting point is promoted, capture is more volatile, is stained with by force
Dirty ingredient.Inside burner hearth, adjustment supplements necessary chemical reaction substance and is promoted as far as possible by the chemical reaction of high-temp combustion
The generation of more low melting points captures more volatile strong contamination ingredients under the high temperature conditions, reduces these substances and exist
Ratio in high-temperature flue gas reduces its condensation on subsequent convection heating surface, realizes and strengthens Boiler Furnace slagging, and it is heated to reduce convection current
The prevention and control target that face is stain.The experimental results showed that the rationally total amount of control silica and aluminum oxide, and control dioxy
SiClx and the ratio of aluminum oxide can effectively adjust ash fusion point in a certain range, and with volatile strong contamination ingredient
(such as alkali metal, alkaline-earth metal) forms alumino-silicate, such as sodium silicoaluminate, potassium aluminosilicate, aluminosilicate iron substance.Kaolin,
Bauxite, quartz can be used as the raw material for adjusting the two indexs.
2, coal-fired ash fusion point is effectively adjusted.The experimental results showed that except the content of above-mentioned silica and aluminum oxide and
Ratio has big influence to ash fusion point, and with the increase of limestone content, coal ash fusion temperature can be reduced first, then be increased, be it is a kind of compared with
Good ash fusion point regulator.Therefore, the additive amount of lime stone is needed to be adjusted according to the distribution of coal-fired ash component.For example,
If calcium content index is relatively low in coal ash, need to increase content, if content is high or higher, so that it may without adding, or
Person improves other compositions, relative reduction calcium content.
3, alleviate and avoid boiler heating surface sulfur corrosion.Hydrogen sulfide pair in coal-burning boiler can be effectively reduced in addition lime stone
High temperature corrosion caused by furnace heating surface, while reducing sulfur trioxide low-temperature corrosion caused by the heating surfaces such as air preheater.
The hydrogen sulfide and three that additions of appropriate lime stone can play capture, sulphur is discharged and is converted in high-temp combustion in solidified coal
The effect of sulfur oxide forms stable, non-corrosive calcium sulfate.
4, increase high melting solid amounts of particles, reduce the adhesion strength of slagging and contamination.There are volatile in high temperature,
The substance that can be condensed on the lower ash particle surface of temperature, boiler heating surface surface etc., such as silicate, alkali metal compound
Deng, other solid ash particle abilities can be bonded strongly by having, and be played the role of " glue ", and the coalescence of soot particle occurs, agglomerates, shape
At serious slagging and contamination.Titanium dioxide is the very high solid particle of fusing point, plays the role of " aggregate " in slagging and in staiing,
The ratio of " aggregate " Yu " glue " can be improved in addition titanium dioxide, and the adhesion strength of slagging and contamination can be effectively reduced, so that
Slagging and contamination become loose, frangible, are easy effectively to be removed online.But because its price is higher, therefore, guaranteeing basic demand
Under the premise of, actual amount minimizes.In addition, other remaining bauxite for being not directly involved in chemical reaction, kaolin, stone
The very high solid particle of the fusing points such as English mine and the solid other compositions ash particle of condensation can also play the role of " aggregate ".
Specific embodiment
Below with reference to embodiment, the present invention is described in more detail, but protection scope of the present invention is not limited only to these realities
Apply example.
Embodiment 1
Bituminous coal, 80g kaolin, 30g bauxite, 10g titanium dioxide are stain by force in the strong slagging of 880g mine to be uniformly mixed, is obtained
It is modified coal-fired.The modification is coal-fired and wherein the testing result of each component ash content and main component is as shown in table 1.
Table 1
Seen from table 1, gained modified coal-fired alkali acid ratio, FA index and fouling index Rf is greatly improved, studies have shown that right
In contamination coal ash fusion temperature index failure by force, actual slagging mitigation is obvious, it is significant to stain mitigation, and slagging and contamination become shortcake
It is loose, frangible, it is easy effectively to be removed online.
Embodiment 2
The strong slagging bituminous coal of 920g mine, 70g kaolin, 10g quartz mine are uniformly mixed, modified fire coal is obtained.It is described to change
Property it is coal-fired and wherein the testing result of each component ash content and main component is as shown in table 2.
Table 2
As can be seen from Table 2, modified coal-fired alkali acid ratio, FA index and the fouling index Rf of gained is greatly improved, fouling characteristics compared with
By force, ash fusion point improves unobvious, and actual slagging stains mitigation obviously.
Embodiment 3
The stronger clinkering property bituminous coal of 950g mine, 45g kaolin, 5g titanium dioxide are uniformly mixed, modified fire coal is obtained.
The modification is coal-fired and wherein the testing result of each component ash content and main component is as shown in table 3.
Table 3
Seen from table 3, the modified coal-fired ash fusion point type slagging index RT of gained is obviously improved, and ash fusion point improves, alkali acid
Improve than, FA index and fouling index Rf, practical slagging situation mitigate it is obvious, controllably.
Claims (3)
1. a kind of modified coal-fired, it is characterised in that it is made of the raw material of following mass percents: fire coal 80%~98.5%, high
Ridge soil 1.5%~20%, bauxite 0%~15%, lime stone 0~8%, quartz mine 0~5%, titanium dioxide 0~5%, and it is described
The compound of silicon and aluminium in modified combustion pit ash, is converted into silica and aluminum oxide calculates, silica and three oxygen
The mass ratio for changing two aluminium is (1.0~4.0): 1, silica and aluminum oxide quality sum account for the 40% of ash content gross mass with
On.
2. according to claim 1 modified coal-fired, it is characterised in that it is made of the raw material of following mass percents: coal-fired
85%~98%, kaolin 2%~15%, bauxite 0%~10%, lime stone 0~5%, quartz mine 0~4%, titanium dioxide 0
~3%, and the modified compound for firing silicon and aluminium in pit ash, it is converted into silica and aluminum oxide calculates, two
The mass ratio of silica and aluminum oxide is (1.3~3.2): 1, it is total that silica with aluminum oxide quality sum accounts for ash content
The 50%~80% of quality.
3. according to claim 1 or 2 modified coal-fired, it is characterised in that: the fire coal is easy during high-temp combustion
Or it is easier to the fire coal of slagging, contamination.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910630306.8A CN110396448A (en) | 2019-07-12 | 2019-07-12 | It is a kind of modified coal-fired |
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| CN201910630306.8A CN110396448A (en) | 2019-07-12 | 2019-07-12 | It is a kind of modified coal-fired |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130125792A1 (en) * | 2009-09-24 | 2013-05-23 | Ash Improvement Technology, Inc. | Production of coal combustion products for use in cementitious materials |
| CN104114681A (en) * | 2011-12-21 | 2014-10-22 | 肯塔基州-田纳西州粘土公司 | Mineral additive blend compositions and methods for operating combustors for avoiding problems such as agglomeration, deposition, corrosion and reducing emissions |
| CN105419903A (en) * | 2015-10-23 | 2016-03-23 | 山东默锐环境产业股份有限公司 | Coke slag tempering type decoking agent suitable for high-sodium coal and preparation method thereof and application thereof |
| CN105972625A (en) * | 2016-05-26 | 2016-09-28 | 新疆宜化化工有限公司 | Method for preventing coking of coal-fired boiler |
| 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 |
-
2019
- 2019-07-12 CN CN201910630306.8A patent/CN110396448A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130125792A1 (en) * | 2009-09-24 | 2013-05-23 | Ash Improvement Technology, Inc. | Production of coal combustion products for use in cementitious materials |
| CN104114681A (en) * | 2011-12-21 | 2014-10-22 | 肯塔基州-田纳西州粘土公司 | Mineral additive blend compositions and methods for operating combustors for avoiding problems such as agglomeration, deposition, corrosion and reducing emissions |
| CN105419903A (en) * | 2015-10-23 | 2016-03-23 | 山东默锐环境产业股份有限公司 | Coke slag tempering type decoking agent suitable for high-sodium coal and preparation method thereof and application thereof |
| CN105972625A (en) * | 2016-05-26 | 2016-09-28 | 新疆宜化化工有限公司 | Method for preventing coking of coal-fired boiler |
| 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 |
Non-Patent Citations (2)
| Title |
|---|
| 姜锡伦: "《锅炉运行与检修技术》", 31 March 2013, 姜锡伦 * |
| 水利电力部热工研究所: "《旋风炉及其灰渣综合利用》", 31 December 1979, 水利电力出版社 * |
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