CN108148631A - A kind of fluxing agent and its adding method for improving coal ash melting property - Google Patents
A kind of fluxing agent and its adding method for improving coal ash melting property Download PDFInfo
- Publication number
- CN108148631A CN108148631A CN201711404818.XA CN201711404818A CN108148631A CN 108148631 A CN108148631 A CN 108148631A CN 201711404818 A CN201711404818 A CN 201711404818A CN 108148631 A CN108148631 A CN 108148631A
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- China
- Prior art keywords
- fluxing agent
- coal
- coal ash
- melting property
- ash melting
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Classifications
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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
-
- 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
- C10J3/72—Other features
-
- 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
- C10J2300/0906—Physical processes, e.g. shredding, comminuting, chopping, sorting
-
- 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
-
- 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
- C10J2300/0996—Calcium-containing inorganic materials, e.g. lime
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
Abstract
A kind of fluxing agent and its adding method for improving coal ash melting property, belonging to improves the technical field of coal ash melting property, it is passive can to solve the problems, such as that the existing method for improving coal ash melting property brings production, fluxing agent includes lime stone and iron ore, the additive amount of lime stone is account for raw coal quality 2.5% ~ 4%, and the additive amount of iron ore is account for raw coal quality 2% ~ 3.5%.Point of addition is selected before coal pulverizer, is fed using belt weighing feed or disk feeder.The present invention effectively improves the meltbility of coal ash, can not only ensure the requirement of mixture homogeneity, but also can meet the needs of environmental protection and steady production.
Description
Technical field
The invention belongs to improve the technical field of coal ash melting property, and in particular to a kind of fluxing agent for improving coal ash melting property
And its adding method.
Background technology
Air flow bed bed pulverized coal gasification technology is that application is relatively wide in current industry, has the modern efficient of certain technical advance
Coal Gasification Technology.But entrained flow bed gasification technology is encountered in the poor coal of coal ash melting property as the production practices of feed coal
Certain limitation, main problem are exactly the slag tap problem of the poor coal of coal ash melting property.Traditional adjustment coal ash melting property
Method be concentrated mainly on it is following several：1. add lime stone；2. the supplying preferable coal of coal ash melting property is carried out with coal gasification；
3. add sodium salt；4. add magnesium salts or borax etc..But there are more problems, such as coal blending in production practices to cause dross unstable
Determine problem；Lime stone adding proportion is higher to cause ash fusion point " pole " to go wrong, more than this adding proportion coal ash melting property
Not improving more preferably not only can become worse instead；Sodium salt corrosion problems caused by ash water system dissolves；The effect of magnesium salts
Unobvious cause the higher problem of ash；Simple iron ore is added in has certain effect to reducing coal ash flowing temperature, but adds
Amount control is bad, and fe can be caused to be restored, the mutation of coal ash viscosity-temperature characteristics, gasification furnace cinder notch or shock chamber's knot
Slag phenomenon；Point of addition is unreasonable to cause addition lack of homogeneity and airborne dust to cause environmental issue greatly；Fluxing agent raw material controls not
It is good, it easily causes that addition and accurate quantification problem can not be stablized, this FAQs causes furnace temperature fluctuation and cinder notch pressure-difference fluctuation
The problems such as, cause very passive situation to production.
Invention content
The present invention brings the problem of passive for the existing method for improving coal ash melting property to production, provides a kind of improvement coal
The fluxing agent and its adding method of ash fusibility.
The present invention adopts the following technical scheme that：
A kind of fluxing agent for improving coal ash melting property includes lime stone and iron ore, and the additive amount of lime stone is to account for raw coal quality
2.5% ~ 4%, the additive amount of iron ore is account for raw coal quality 2% ~ 3.5%.
The grain size of the lime stone is less than 13mm, wherein, part of the grain size more than 1mm is no less than 90%.
The grain size of the iron ore is less than 13mm, wherein, part of the grain size more than 1mm is no less than 90%.
A kind of adding method for the fluxing agent for improving coal ash melting property includes the following steps：Point of addition is selected in coal pulverizer
Before, it is fed using belt weighing feed or disk feeder.
Beneficial effects of the present invention are as follows：
1. in the fluxing agent of the present invention, lime stone is the main matter for improving coal ash melting property, iron ore is that adjustment lime stone adds
Add ratio pole, improve the active principle of ash viscosity；
2. the present invention fluxing agent particle size range selection, be conducive to fluxing agent addition stabilization and uniformly；
3. the point of addition of the fluxing agent of the present invention is selected before coal pulverizer, it can not only ensure the requirement of mixture homogeneity, but also can
To meet the needs of environmental protection and steady production；
4. of the invention be fed using belt weighing feed or disk feeder, it is possible to prevente effectively from feed stability is poor and accurate
The needs of control.
Specific embodiment
Embodiment 1, the concrete operations using the fluxing agent and its addition manner of the present invention are as follows：
First, the preparation stage：Before experiment, after C mill raw material coal bunker raw coal is used up, stop grinding spare.
Start to convey mixed with 4% to C raw materials coal bunker（wt）Lime stone+3.5（wt）Iron powder material coal；
After raw material coal bunker memory has the raw coal of 50t, C mills are opened, starts mill and replaces the feed coal after fluxing agent, mixed with iron powder
Fine coal enter the stove time for 15 when or so；
Oxygen coal ratio is down to 0.8 by 2# gasification furnaces by 0.85, and entering stove for fine coal is ready；
Enter stove mixed with the fine coal of iron powder, certain variation occurs in the gasification furnace working of a furnace：Main coil density is by 550kg/m3Rise to 720kg/
m3, drum steam production is gradually down to 1000kg/h, synthesis gas on-line analysis CO by 3500kg/h2 It is minimum to be down to 10.3 %, synthesis
Gas dry gas flow is by 53000Nm3/ h rises to 56000Nm3/h；Operative employee reduces drum rate of water make-up and steps up oxygen coal simultaneously immediately
Than highest is carried to 0.89, and gasification furnace starts scaling-off situation occur, and main coil density gradually reduces, minimum to be down to 550kg/m3,
Drum steam production is most surging to 7000 kg/h, and synthesis gas on-line analysis methane content maintains 20ppm or so, by oxygen coal than controlling
For system 0.8 or so, methane maintains 50ppm or so.By adjusting the working of a furnace again, gasification furnace gradually settles out.
As the gasification furnace working of a furnace gradually settles out, the slag blanket in gasification furnace stove is more and more thicker, causes main coil most surging
To 780 kg/m3, drum do not have a byproduct steam, drum with gasification furnace pressure difference is minimum is down to 0.3MPa, after medium-pressure boiler water is followed
Ring water is by 650m3/ h is down to 610m3/ h controls drum byproduct steam in 2000 ~ 4000 kg/h, and drum pressure maintains
5.0MPa, main coil maintain 600 ~ 700kg/m3。
By 1# gasification furnaces load by 20500 Nm3/ h is down to 19500 Nm3/ h prepares two stoves and tests simultaneously；
1# gasification furnace oxygen coal ratios are down to 0.80 by 0.85 or so, entering stove for fine coal is ready；
Fine coal enters stove, and the gasification furnace working of a furnace is similar to 2# gasification furnaces, uses for reference 2# gasification furnace methods of adjustment, adjusts 1# gasification furnaces；
By medium-pressure boiler water quantity of circulating water by 640m3/ h is down to 600m3/ h controls drum byproduct steam 2000 ~ 4000
Kg/h, drum pressure maintain 5.0MPa, and main coil maintains 600 ~ 700 kg/m3。
2nd, operating condition and data analysis：
It can find, be mixed after burning iron powder from the general introduction of more than test situation, some changes of gasifying furnace device operating condition are main to show
：
（1）After replacing fluxing agent, fine coal ash fusion point declines, therefore 2# gasification furnace oxygen coal is down to 0.80 than control by 0.85 or so
Left and right；
（2）It can reflect that the slag blanket of gasification furnace dross is thickening indirectly from Coil density, 2# gasification furnace main coil density is by before
500 ~ 600 kg/m3 become 600 ~ 700 kg/m3 or so；
（3）2# gasification furnaces shock chamber liquid level is unstable before experiment, and the supreme water that flashes black in shock chamber maintains 110 ~ 120 m3/
H, after replacing fluxing agent, since ash fusion point is relatively low, gasification furnace thermic load reduces, and improves problem above to a certain extent,
10 m of the supreme flash back water rise in shock chamber3/ h maintains 120 ~ 130 m3/h；
（4）Since gasification furnace slag blanket is thickening, the small not even producing steam of drum byproduct steam is unfavorable for controlling thickness of slag layer, adjustment
2# medium-pressure boiler water internal circulating loads are by 650 m3/ h is down to 610 m3/ h or so；
（5）The effective gas ingredient of synthesis gas is improved by 87% or so to more than 89%, and methane content is improved by 80ppm to a 120 ppm left sides
It is right；
（6）When two stoves are tested simultaneously, cleaning up tolerance increases by 3000 Nm3/ h or so.
Embodiment 2, the concrete operations using the fluxing agent and its addition manner of the present invention are as follows：
First, the concrete operations using the fluxing agent and its addition manner of the present invention are as follows：
1. adding proportion：3.3%（wt）Lime stone+2.5（wt）Iron powder；
2. fluxing agent morphological requirements：Less than 13mm, wherein being not less than 90% more than lmm；
3. addition manner：It is added using belt scale and disk feeder；Frequency control；It is chain with feed coal charging gear.
4. other situation explanations：
（1）Early period is single fluxing agent according to other achievements, fluxing agent, and adding proportion is larger（More than 6%）, ash fusion point is higher（Greatly
In 1380 DEG C）；
（2）Before this, because fluxing agent granularity problem once caused fluxing agent to add fracture, working of a furnace verification fluctuation, until disk
Mouth pressure difference increases suddenly, leads to blowing out；
（3）After the adjustment of this fluxing agent, the working of a furnace is stablized, and consumption reduces, and fluxing agent type and ratio determine substantially, produces continuous fortune
Row.
2nd, operating condition and data analysis：
It can find, mix after burning iron powder, some changes occur for gasifying furnace device operating condition, mainly from the general introduction of more than test situation
It shows：
（1）After replacing fluxing agent, fine coal ash fusion point declines, therefore 2# gasification furnace oxygen coal is down to 0.80 than control by 0.85 or so
Left and right；
（2）It can reflect that the slag blanket of gasification furnace dross is thickening indirectly from Coil density, 2# gasification furnace main coil density is by before
500 ~ 600 kg/m3Become 600 ~ 700 kg/m3Left and right；
（3）2# gasification furnaces shock chamber liquid level is unstable before experiment, and the supreme water that flashes black in shock chamber maintains 110 ~ 120 m3/
H, after replacing fluxing agent, since ash fusion point is relatively low, gasification furnace thermic load reduces, and improves problem above to a certain extent,
10 m of the supreme flash back water rise in shock chamber3/ h maintains 120 ~ 130 m3/h；
（4）Since gasification furnace slag blanket is thickening, the small not even producing steam of drum byproduct steam is unfavorable for controlling thickness of slag layer, adjustment
2# medium-pressure boiler water internal circulating loads are by 650 m3/ h is down to 610 m3/ h or so；
（5）The effective gas ingredient of synthesis gas is improved by 87% or so to more than 89%, and methane content is improved by 80 ppm to a 120 ppm left sides
It is right；
（6）When two stoves are tested simultaneously, cleaning up tolerance increases by 3000 Nm3/ h or so.
Claims (4)
1. a kind of fluxing agent for improving coal ash melting property, it is characterised in that：Including lime stone and iron ore, the additive amount of lime stone
To account for the 2.5% ~ 4% of raw coal quality, the additive amount of iron ore is account for raw coal quality 2% ~ 3.5%.
2. a kind of fluxing agent for improving coal ash melting property according to claim 1, it is characterised in that：The grain of the lime stone
Diameter is less than 13mm, wherein, part of the grain size more than 1mm is no less than 90%.
3. a kind of fluxing agent for improving coal ash melting property according to claim 1, it is characterised in that：The grain of the iron ore
Diameter is less than 13mm, wherein, part of the grain size more than 1mm is no less than 90%.
4. a kind of adding method of the fluxing agent as described in claim 1 for improving coal ash melting property, it is characterised in that：Including such as
Lower step：Point of addition is selected before coal pulverizer, is fed using belt weighing feed or disk feeder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711404818.XA CN108148631A (en) | 2017-12-22 | 2017-12-22 | A kind of fluxing agent and its adding method for improving coal ash melting property |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711404818.XA CN108148631A (en) | 2017-12-22 | 2017-12-22 | A kind of fluxing agent and its adding method for improving coal ash melting property |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108148631A true CN108148631A (en) | 2018-06-12 |
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ID=62465071
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711404818.XA Pending CN108148631A (en) | 2017-12-22 | 2017-12-22 | A kind of fluxing agent and its adding method for improving coal ash melting property |
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| CN (1) | CN108148631A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113652264A (en) * | 2021-08-23 | 2021-11-16 | 晋能控股装备制造集团华昱能源化工山西有限责任公司 | High-sulfur smokeless fly ash fluxing agent |
| CN113817509A (en) * | 2020-06-19 | 2021-12-21 | 中国石油化工股份有限公司 | Method for repairing fixed slag layer of water-cooled wall of pulverized coal gasifier on line |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54129005A (en) * | 1978-03-30 | 1979-10-06 | Agency Of Ind Science & Technol | Method and device for coal gasification |
| CN1970698A (en) * | 2006-11-28 | 2007-05-30 | 西安热工研究院有限公司 | Flux capable of reducing melting point of coal ash and method for preparing same |
| CN106675657A (en) * | 2016-12-07 | 2017-05-17 | 西北大学 | Method for regulating and controlling flowing temperature of high-melting-point coal ash |
-
2017
- 2017-12-22 CN CN201711404818.XA patent/CN108148631A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54129005A (en) * | 1978-03-30 | 1979-10-06 | Agency Of Ind Science & Technol | Method and device for coal gasification |
| CN1970698A (en) * | 2006-11-28 | 2007-05-30 | 西安热工研究院有限公司 | Flux capable of reducing melting point of coal ash and method for preparing same |
| CN106675657A (en) * | 2016-12-07 | 2017-05-17 | 西北大学 | Method for regulating and controlling flowing temperature of high-melting-point coal ash |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113817509A (en) * | 2020-06-19 | 2021-12-21 | 中国石油化工股份有限公司 | Method for repairing fixed slag layer of water-cooled wall of pulverized coal gasifier on line |
| CN113652264A (en) * | 2021-08-23 | 2021-11-16 | 晋能控股装备制造集团华昱能源化工山西有限责任公司 | High-sulfur smokeless fly ash fluxing agent |
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Application publication date: 20180612 |
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| RJ01 | Rejection of invention patent application after publication |