Method for firing an industrial furnace using coal or cokes with a secondary fuel
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F23G-005/00
F23G-005/033
C10L-005/36
C10L-005/40
F23G-005/08
F23G-007/12
출원번호
US-0129885
(2015-04-07)
등록번호
US-10006630
(2018-06-26)
우선권정보
EP-14163780 (2014-04-07)
국제출원번호
PCT/EP2015/057531
(2015-04-07)
국제공개번호
WO2015/155193
(2015-10-15)
발명자
/ 주소
Jennissen, Lars
Koekkoek, Ralph
출원인 / 주소
Subcoal International B.V.
대리인 / 주소
Amirsehhi, Ramin
인용정보
피인용 횟수 :
0인용 특허 :
7
초록▼
The invention relates to a process for firing an industrial furnace, in particular for electricity generation, wherein coal or cokes together with a secondary fuel comprising cellulose and plastic, in the form of pellets of a size larger than about 3 mm thickness, and having a caloric value of about
The invention relates to a process for firing an industrial furnace, in particular for electricity generation, wherein coal or cokes together with a secondary fuel comprising cellulose and plastic, in the form of pellets of a size larger than about 3 mm thickness, and having a caloric value of about 16 GJ/ton or more is ground to a powder wherein about 95 wt % or more has a particle size smaller than 2 mm and wherein the d50 of the particle size distribution is between about 5 and about 100 μm, wherein the powder is injected in the flame of the furnace. In this process the grinding is performed in a roller mill or ball mill, and the amount of pellets used together with the coals preferably is about 3 wt % or more, relative to the coal.
대표청구항▼
1. A process for firing an industrial furnace wherein coal or cokes together with a secondary fuel comprising cellulose and plastic in the form of pellets of a size larger than about 3 mm thickness and having a caloric value of about 16 GJ/ton or more is co-grinded to a powder in a mill, wherein abo
1. A process for firing an industrial furnace wherein coal or cokes together with a secondary fuel comprising cellulose and plastic in the form of pellets of a size larger than about 3 mm thickness and having a caloric value of about 16 GJ/ton or more is co-grinded to a powder in a mill, wherein about 95 wt % or more of the powder has a particle size smaller than 2 mm, wherein the d50 of the particle size distribution is between about 5 and about 100 μm, and wherein the powder is injected in the flame of the furnace. 2. The process according to claim 1, wherein the co-grinding is performed in a roller mill or a ball mill. 3. The process according to claim 1, wherein the d50 of the powdered fuel is between 50 μm and about 10 μm. 4. The process according to claim 1, wherein the powdered fuel has a d90 of 0.5 mm or lower. 5. The process according to claim 1, wherein the pellets have a thickness of between about 3 mm and 20 mm. 6. The process according to claim 1, wherein the pellets consist of an amount of cellulose and plastic of about 50 wt % or more, relative to dry pellets. 7. The process according to claim 1, wherein the pellets consist of an amount of plastic of about 20 wt % or more. 8. The process according to claim 1, wherein the pellets have a caloric value of about 18 GJ/ton or more. 9. The process according to claim 1, wherein the strength of the pellets is between about 5 Kgf and about 70 Kgf. 10. The process according to claim 1, wherein an amount of pellets is used together with the coals is about 5 wt % or more, relative to the coal. 11. The process according to claim 1, wherein the mill is operated with a flow gas, wherein the flow gas is at a temperature of about 164° C. or higher upon entrance of the mill. 12. The process according to claim 1, wherein the industrial furnace is a furnace of a thermal power station for electricity generation. 13. The process according to claim 1, wherein the pellets consist of an amount of plastic of about 40 wt % or more, relative to dry pellets. 14. A process for firing an industrial furnace wherein coal or cokes together with a secondary fuel comprising cellulose and plastic in the form of pellets of a size larger than about 3 mm thickness and having a caloric value of about 16 GJ/ton or more is co-grinded to a powder in a mill, wherein about 95 wt % or more of the powder has a particle size smaller than 2 mm, wherein the d50 of the particle size distribution is between about 5 and about 100 μm, wherein the powder is injected in the flame of the furnace, wherein the mill is operated with a flow gas, wherein the flow gas is at a temperature of about 164° C. or higher upon entrance of the mill, andwherein the industrial furnace is a furnace of a thermal power station for electricity generation. 15. The process according to claim 14, wherein the d50 of the powdered fuel is between 50 μm and about 10 μm and wherein the powdered fuel has a d90 of 0.5 mm or lower. 16. The process according to claim 14, wherein the pellets have a thickness of between about 3 mm and 20 mm and wherein the pellets consist of an amount of cellulose and plastic of about 50 wt % or more, relative to dry pellets. 17. The process according to claim 14, wherein the mill is operated with a flow gas, wherein the flow gas is at a temperature of about 200° C. or higher upon entrance of the mill. 18. The process according to claim 14, wherein the co-grinding is performed in a roller mill or ball mill. 19. A process for firing an industrial furnace wherein coal or cokes together with a secondary fuel comprising cellulose and plastic in the form of pellets of a size larger than about 3 mm thickness and having a caloric value of about 16 GJ/ton or more is co-grinded to a powder in a mill, wherein about 95 wt % or more of the powder has a particle size smaller than 2 mm, wherein the d50 of the particle size distribution is between about 5 and about 100 μm, wherein the powder is injected in the flame of the furnace, wherein the grinder is operated with a flow gas, wherein the flow gas is at a temperature of about 164° C. or higher upon entrance of the mill,wherein the industrial furnace is a furnace of a thermal power station for electricity generation, andwherein the co-grinding is performed in a roller mill or ball mill,wherein the d50 of the powdered fuel is between 50 μm and about 10 μm and wherein the d90 of the powdered fuel is 0.5 mm or lower, andwherein the pellets have a thickness of between about 3 mm and 20 mm and wherein the pellets consist of an amount of cellulose and plastic of about 50 wt % or more, relative to dry pellets. 20. The process according to claim 19, wherein the mill is operated with a flow gas, wherein the flow gas is at a temperature of about 200° C. or higher upon entrance of the mill.
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이 특허에 인용된 특허 (7)
Andrews Michael R. (Chaffee NY), Fuel pellet and method of making the fuel pellet.
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