CN1970698A - Flux capable of reducing melting point of coal ash and method for preparing same - Google Patents
Flux capable of reducing melting point of coal ash and method for preparing same Download PDFInfo
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- CN1970698A CN1970698A CN 200610104987 CN200610104987A CN1970698A CN 1970698 A CN1970698 A CN 1970698A CN 200610104987 CN200610104987 CN 200610104987 CN 200610104987 A CN200610104987 A CN 200610104987A CN 1970698 A CN1970698 A CN 1970698A
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- powder
- flux
- coal
- ash
- coal ash
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
- Y02E20/18—Integrated gasification combined cycle [IGCC], e.g. combined with carbon capture and storage [CCS]
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Abstract
The invention discloses a flux to reduce fusing point of coal ash and making method, which comprises the following parts: 82%-93% CaCO3, 2%-16% Fe2O3 and MgCO3. The flux is blended into coal to change fusing property of coal ash in the gasifying course, which reduces ash fusing point and ash viscosity to discharge ash at liquid pattern sequently.
Description
Technical field
The invention belongs to the slag tap technical field, be specifically related to a kind of fusing assistant that reduces coal ash fusion temperature and preparation method thereof, this fusing assistant is to be used for reducing the cindery ash fusion point that coal produces in gasification and the additive that adds in fine coal.
Background technology
China is one of maximum in the world coal production state and country of consumption, and coal production accounts for 25% of world's output of coal, and consumption of coal accounts for about 70% of China's primary energy source consumption.In China's energy structure, coal resources are the abundantest, and oil, natural gas source be relative deficiency then.In longer a period of time, China can not change take coal as main energy resource structure, and therefore, the industries such as China's electric power and chemical industry also will remain unchanged for a long period of time take fire coal as main strategic general layout.
84% of coal in China ultimate production is used for direct burning.No matter be burning or gasification, can lime-ash successfully discharge all is the key that can device trouble-free operation.Therefore, the melting characteristic of coal ash slag and viscosity-temperature characteristics are important indicators of steam coal and coal for gasification.
Classify by the deslagging mode, burning of coal and gasifying process all can be divided into dry ash extraction and slag tap two big classes.
Dry bottom furnace requires coal ash melting temperature than operating temperature height, and lime-ash is discharged with solid-state form.For preventing slagging scorification, need coal that higher grey melt temperature is arranged, guarantee that gasification furnace or boiler move all the time under the furnace temperature that is lower than grey melting softening temperature.If coal ash fusion softening temperature is low, easily cause slagging scorification on the one hand, make the stove can't ash discharge, even burn out equipment, what influence was produced carries out continuously; On the other hand, short grained fuel can be by the liquid film of slag parcel, or enters in the middle of the bulk lime-ash that bonds together and can not get oxygen, can not burn, and causes carbon loss rate height.
Slag tapping boiler requires coal ash melting temperature lower than service temperature, and its service temperature generally should be higher than about 150 ℃ of yield temperatures (FT), and lime-ash is discharged with liquid form, in fact mainly determines service temperature according to the viscosity-temperature characteristics of coal ash.Consider the life-span of vapourizing furnace refractory materials, temperature element and the economy of operation in addition, so service temperature should not be too high.Be generally about 1500 ℃.For the coal of high ash melting point, high ash viscosity, the fusing assistant by adding suitable kind, appropriate amount or mix and join low ash smelting point then, the coal of low ash viscosity reduces its service temperature.
In recent years, extensive efficient air fluidized bed Coal Gasification Technology development rapidly.Dried coal powder pressurized air flow bed gasification technology is representative with Shell and Prenflo, and the gasification operation temperature belongs to the slag tap gasification technology up to 1450～1600C.These type of furnaces have caused the very big concern of chemical industry and energy circle because having the characteristics such as the high and environmental pollution of efficiency of carbon con version is low.Therefore, the mineral matter composition of further investigation Coal rank and different types of additive and flux are very necessary to the impact of ash melting characteristic.
Summary of the invention
The objective of the invention is at the grey melt temperature of coal higherly, can not be used for the technical barrier of slag tapping boiler and a kind of fusing assistant that reduces coal ash fusion temperature of providing and preparation method thereof.
For achieving the above object, the preparation method that the present invention adopts is: by mass percentage with 82%～93% CaCO
3Powder, 2%～16% Fe
2O
3Powder and MgCO
3Powder fully mixes and gets final product.
The flux of reduction coal ash fusion temperature of the present invention contains 82%～93% CaCO by mass percentage
3, 2%～16% Fe
2O
3, surplus is MgCO
3
Several materials below flux of the present invention has generated in heating process, CaOFe
2O
3Formation (1050～1150 ℃); Al
2O
3Generate calcium aluminate (1100～1150 ℃) with the CaO reaction; Calcium aluminate is fused to CaOFe
2O
3In (1100～1150 ℃), form the iron monocalcium aluminate; The fusing of iron monocalcium aluminate and and Fe
2O
3Reaction generates iron aluminic acid half calcium (1200～1250 ℃); Subsequently with SiO
2Reaction generates sial calcium ferrite (1200～1250 ℃).The calcium ferrite fusing point is low in these resultants, and the eutectic characteristic causes ash melting point to reduce.
The add-on of fusing assistant accounts for 25%～32% of fusing assistant and feed coal gross weight in use.
Embodiment
Embodiment 1, by mass percentage with 82% CaCO
3Powder, 16% Fe
2O
3Powder and MgCO
3Powder fully is mixed and made into flux.This flux contains 82% CaCO by mass percentage
3, 16% Fe
2O
3, surplus is MgCO
3
Embodiment 2, by mass percentage with 93% CaCO
3Powder, 2% Fe
2O
3Powder and MgCO
3Powder fully is mixed and made into flux.This flux contains 93% CaCO by mass percentage
3, 2% Fe
2O
3, surplus is MgCO
3
Embodiment 3, by mass percentage with 85% CaCO
3Powder, 12% Fe
2O
3Powder and MgCO
3Powder fully is mixed and made into flux.This flux contains 85% CaCO by mass percentage
3, 12% Fe
2O
3, surplus is MgCO
3
Embodiment 4, by mass percentage with 90% CaCO
3Powder, 8% Fe
2O
3Powder and MgCO
3Powder fully is mixed and made into flux.This flux contains 90% CaCO by mass percentage
3, 8% Fe
2O
3, surplus is MgCO
3
Embodiment 5, by mass percentage with 87% CaCO
3Powder, 10% Fe
2O
3Powder and MgCO
3Powder fully is mixed and made into flux.This flux contains 87% CaCO by mass percentage
3, 10% Fe
2O
3, surplus is MgCO
3
Embodiment 6, by mass percentage with 91% CaCO
3Powder, 5% Fe
2O
3Powder and MgCO
3Powder fully is mixed and made into flux.This flux contains 91% CaCO by mass percentage
3, 5% Fe
2O
3, surplus is MgCO
3
The add-on of fusing assistant accounts for 25%～32% of fusing assistant and feed coal gross weight in use.
Fusing assistant of the present invention is applied to Huainan coal, and its test-results that reduces ash fusion point shows that the adding of this fusing assistant can drop to the ash fusion point of Huainan coal below 1380 ℃, and test-results is as follows:
Huainan coal adds fusing assistant melt temperature experiment with measuring
| The test coal | SiO 2 (％) | Al 2O 3 (％) | Fe 2O 3 (％) | CaO (％) | MgO (％) | Na 2O (％) | Melt temperature (FT) (℃) |
| NS805 | 51.01 | 30.63 | 6 | 3.25 | 0.6 | 0.2 | 1375 |
| KL1 | 47.1 | 35.3 | 4.72 | 5.67 | 0.75 | 0.26 | 1373 |
| HN114 | 55.1 | 29.7 | 3.37 | 6.98 | 0.5 | 0.2 | 1379 |
| HNP01 | 50.1 | 32.9 | 8.42 | 1.37 | 0.62 | 0.45 | 1374 |
This flux is evenly sneaked in the high-ash-fusion coal, can change its ash melting characteristic in gasification, reduces ash fusion point and ash viscosity, thereby lime-ash is discharged smoothly with liquid form, and having solved high-ash-fusion coal can't be for the technical barrier of slag tapping boiler.
Claims (8)
1, a kind of preparation method who reduces the flux of coal ash fusion temperature is characterized in that: by mass percentage with 82%～93% CaCO
3Powder, 2%～16% Fe
2O
3Powder and MgCO
3Powder fully mixes and gets final product.
2, the preparation method of the flux of reduction coal ash fusion temperature according to claim 1 is characterized in that: by mass percentage with 82% CaCO
3Powder, 16% Fe
2O
3Powder and MgCO
3Powder fully is mixed and made into flux.
3, the preparation method of the flux of reduction coal ash fusion temperature according to claim 1 is characterized in that: by mass percentage with 93% CaCO
3Powder, 2% Fe
2O
3Powder and MgCO
3Powder fully is mixed and made into flux.
4, the preparation method of the flux of reduction coal ash fusion temperature according to claim 1 is characterized in that: by mass percentage with 85% CaCO
3Powder, 12% Fe
2O
3Powder and MgCO
3Powder fully is mixed and made into flux.
5, the preparation method of the flux of reduction coal ash fusion temperature according to claim 1 is characterized in that: by mass percentage with 90% CaCO
3Powder, 8% Fe
2O
3Powder and MgCO
3Powder fully is mixed and made into flux.
6, the preparation method of the flux of reduction coal ash fusion temperature according to claim 1 is characterized in that: by mass percentage with 87% CaCO
3Powder, 10% Fe
2O
3Powder and MgCO
3Powder fully is mixed and made into flux.
7, the preparation method of the flux of reduction coal ash fusion temperature according to claim 1 is characterized in that: by mass percentage with 91% CaCO
3Powder, 5% Fe
2O
3Powder and MgCO
3Powder fully is mixed and made into flux.
8, a kind of flux that reduces coal ash fusion temperature is characterized in that: contain by mass percentage 82%～93% CaCO
3, 2%～16% Fe
2O
3, surplus is MgCO
3
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610104987 CN100596302C (en) | 2006-11-28 | 2006-11-28 | Flux capable of reducing melting point of coal ash and method for preparing same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610104987 CN100596302C (en) | 2006-11-28 | 2006-11-28 | Flux capable of reducing melting point of coal ash and method for preparing same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1970698A true CN1970698A (en) | 2007-05-30 |
| CN100596302C CN100596302C (en) | 2010-03-31 |
Family
ID=38111725
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610104987 Expired - Fee Related CN100596302C (en) | 2006-11-28 | 2006-11-28 | Flux capable of reducing melting point of coal ash and method for preparing same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100596302C (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102051247A (en) * | 2010-12-11 | 2011-05-11 | 水煤浆气化及煤化工国家工程研究中心 | Assistant for improving viscosity-temperature characteristics of coal |
| CN104178222A (en) * | 2014-08-12 | 2014-12-03 | 新奥科技发展有限公司 | Coal blending method for catalytic gasification process |
| CN104479794A (en) * | 2014-10-24 | 2015-04-01 | 东方电气集团东方锅炉股份有限公司 | Flux for reducing fine coal gasification ash melting point temperature and use method thereof |
| CN104479793A (en) * | 2014-10-24 | 2015-04-01 | 东方电气集团东方锅炉股份有限公司 | Composite flux for reducing fine coal gasification ash melting point temperature |
| CN105400570A (en) * | 2015-12-21 | 2016-03-16 | 神华集团有限责任公司 | Method for reducing coal ash melting temperature |
| 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 |
| CN110240940A (en) * | 2019-07-12 | 2019-09-17 | 陕西宏远燃气设备有限责任公司 | A kind of coal gasification method |
| CN111534355A (en) * | 2020-04-01 | 2020-08-14 | 绍兴凤登环保有限公司 | Fluxing agent for reducing coal ash melting point |
| 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 |
| CN114426388A (en) * | 2021-12-14 | 2022-05-03 | 北京建筑材料科学研究总院有限公司 | Treatment system and method for waste incineration fly ash |
-
2006
- 2006-11-28 CN CN 200610104987 patent/CN100596302C/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102051247A (en) * | 2010-12-11 | 2011-05-11 | 水煤浆气化及煤化工国家工程研究中心 | Assistant for improving viscosity-temperature characteristics of coal |
| CN104178222A (en) * | 2014-08-12 | 2014-12-03 | 新奥科技发展有限公司 | Coal blending method for catalytic gasification process |
| CN104479793B (en) * | 2014-10-24 | 2016-03-30 | 东方电气集团东方锅炉股份有限公司 | A kind of composite fluxing agent reducing gasified pulverized coal slag ash fusion point temperature |
| CN104479793A (en) * | 2014-10-24 | 2015-04-01 | 东方电气集团东方锅炉股份有限公司 | Composite flux for reducing fine coal gasification ash melting point temperature |
| CN104479794B (en) * | 2014-10-24 | 2016-03-30 | 东方电气集团东方锅炉股份有限公司 | A kind of fusing assistant and using method thereof reducing gasified pulverized coal slag ash fusion point temperature |
| CN104479794A (en) * | 2014-10-24 | 2015-04-01 | 东方电气集团东方锅炉股份有限公司 | Flux for reducing fine coal gasification ash melting point temperature and use method thereof |
| CN105400570A (en) * | 2015-12-21 | 2016-03-16 | 神华集团有限责任公司 | Method for reducing coal ash melting temperature |
| CN105400570B (en) * | 2015-12-21 | 2018-01-16 | 神华集团有限责任公司 | A kind of method for reducing coal ash melting temperature |
| 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 |
| CN110240940A (en) * | 2019-07-12 | 2019-09-17 | 陕西宏远燃气设备有限责任公司 | A kind of coal gasification method |
| CN111534355A (en) * | 2020-04-01 | 2020-08-14 | 绍兴凤登环保有限公司 | Fluxing agent for reducing coal ash melting point |
| 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 |
| CN114426388A (en) * | 2021-12-14 | 2022-05-03 | 北京建筑材料科学研究总院有限公司 | Treatment system and method for waste incineration fly ash |
| CN114426388B (en) * | 2021-12-14 | 2023-01-31 | 北京建筑材料科学研究总院有限公司 | Treatment system and method for waste incineration fly ash |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100596302C (en) | 2010-03-31 |
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Granted publication date: 20100331 Termination date: 20131128 |