CN103868349B - The energy-saving and emission-reduction method of carbon anode roasting furnace - Google Patents
The energy-saving and emission-reduction method of carbon anode roasting furnace Download PDFInfo
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- CN103868349B CN103868349B CN201410121018.7A CN201410121018A CN103868349B CN 103868349 B CN103868349 B CN 103868349B CN 201410121018 A CN201410121018 A CN 201410121018A CN 103868349 B CN103868349 B CN 103868349B
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Abstract
The energy-saving and emission-reduction method of carbon anode roasting furnace, relates to metallurgical industry charcoal element technical field, specially for roaster is configured with special boiler face Sealing furnace lid, is optimized: the spray penetration of flame is 0.35 times of the quirk degree of depth to roaster technique; Preheating furnace chamber products temperature and quirk flue-gas temperature gap are more than 280 DEG C; Preheating furnace chamber the 2nd hopper inserts thermocouple.The present invention substantially increases the sealing effectiveness of roaster, effectively prevents cold air to enter in roaster; Simultaneously according to the practical experience of furnace chamber Temperature Distribution, the operating procedure method of roaster is optimized, ensure that the Thorough combustion of fugitive constituent and the homogeneous temperature up and down of quirk, greatly reduce the energy consumption of carbon anode roasting furnace.
Description
Technical field
The present invention relates to metallurgical industry charcoal element technical field, be specifically related to a kind of energy-saving and emission-reduction method of carbon anode roasting furnace.
Background technology
China is electrolyzing aluminum industry big producing country, and along with increasing substantially of electrolytic aluminium, the demand of antianode carbon block also grows with each passing day, and in aluminum carbon anode production process, roaster is a very important equipment.Investment accounts for 40% of carbon anode plant investment, and it is invested founding the factory and have the greatest impact to production cost. and roasting technique energy consumption accounts for more than 50% of carbon anode energy consumption.Because roaster is after 2-3 runs, the non-constant of sealing effectiveness, cold air enters burning quirk, improves the consumption of fuel.Current energy consumption is all more than 85 cubes/ton, and volatile combustion is insufficient, needs could outwards get rid of after cleaning equipment.The key of roaster technology how to control and utilize anode volatile matter to make its Thorough combustion and the optimization to burning time and burning position in stove, the volatile matter heat that in roasting process, green anode produces theoretically almost can meet the use of baked anode itself, but amount of heat is absorbed by furnace wall and flue gas has been taken away in reality, how according to the actual conditions of roasting process roaster technique is optimized and becomes urgent need to solve the problem in the industry.
Summary of the invention
The invention provides a kind of energy-saving and emission-reduction method of carbon anode roasting furnace, the sealing difference existed to solve prior art causes the problem that volatile combustion is insufficient, energy consumption is high.
The technical solution adopted for the present invention to solve the technical problems is:
An energy-saving and emission-reduction method for carbon anode roasting furnace, concrete grammar measure is as follows:
1) roaster sealing
1-1, first, we confirm bell length and width size according to the size of each furnace chamber length and width of roaster, and the temperature according to the boiler face heat radiation of moving back stove high temperature furnace chamber confirms bell height dimension, thus obtains the size of bell length, width and height;
1-2, make special boiler face Sealing furnace lid according to bell size, some channel-section steels are used to be fixed on by screen cloth on bell framework, fire retardant is positioned on the fixed mount of bell base of frame, and be fixed by the depression bar of bell framework side, arrange fibrofelt between the fixation clip of bell base of frame and movable pressing board, fibrofelt is fixed by the cam be arranged on the axle sleeve of bell base of frame;
1-3, special boiler face Sealing furnace cover in each operational system method of operating of roaster:
1.3.1, pre-install after smoke discharge frame on furnace chamber and cover special furnace face sealing bell;
1.3.2, special boiler face Sealing furnace lid on preheating furnace chamber upper cover;
1.3.3, special boiler face Sealing furnace lid on stove high temperature furnace chamber upper cover is being moved back;
1.3.4, each special boiler face Sealing furnace lid moved forward along with the system cloud gray model cycle;
2) technological operation optimization
2-1, preheating furnace chamber programming rate is brought up to 12 DEG C/h from 9 DEG C/h; Preheating furnace chamber terminal temperature is brought up to 800 DEG C from 550 DEG C, terminal temperature is preheating furnace chamber hole flue-gas temperature, make each preheating furnace chamber products temperature and quirk flue-gas temperature gap more than 280 DEG C, guarantee when volatile matter is discharged, fire path temperature reaches more than burning-point, and volatile matter can be burnt cmpletely;
The spray penetration of 2-2, flame must reach 0.35 times of the quirk degree of depth, the homogeneous temperature up and down of guarantee quirk;
2-3, insert thermocouple at each preheating furnace chamber the 2nd hopper respectively, control each preheating furnace chamber products temperature and fire path temperature gap more than 280 DEG C, adjust negative pressure according to it.
The key of roaster technology how to control and utilize anode volatile matter to make its Thorough combustion and the optimization to burning time and burning position in stove.In principle, the volatile matter heat that in roasting process, green anode produces almost can meet the use of baked anode itself, but has amount of heat to be taken away by furnace wall absorption and flue gas.The difficult point that roaster controls is that the discharge of volatile matter and Ran Shao ﹙ are to the Kong ﹚ of efflux time, position, eliminating amount.In theory, green compact pitch thermal expansion during normal temperature-200 DEG C, tension force reduces; 150 DEG C--after 350 DEG C of pitches expand, redistribute in space, infiltrate in petroleum coke particle; 350 DEG C--the lightweight volatile matter release of 450 DEG C of pitches; 450 DEG C--getting rid of for 600 DEG C in a large number can not the volatile matter of coking; 600 DEG C--900 DEG C of release heavy amount cracking volatile matters; 900 DEG C--1050 DEG C of crystal reconfigure.Specifically tar gas 420 DEG C volatilization in a large number, 400 DEG C take fire.640 DEG C, methane is volatilization in a large number, and 625 DEG C take fire.Hydrogen 800 DEG C is volatilization in a large number, and 567 DEG C take fire.
Compared with existing process, beneficial effect of the present invention is according to carbon anode roasting furnace working order, specially for roaster is configured with special boiler face Sealing furnace lid, substantially increases the sealing effectiveness of roaster, effectively prevents cold air to enter in roaster; Simultaneously according to the practical experience of furnace chamber Temperature Distribution, the operating procedure method of roaster is optimized, ensure that the Thorough combustion of fugitive constituent and the homogeneous temperature up and down of quirk, greatly reduce the energy consumption of carbon anode roasting furnace.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is the structural representation of bell in the present invention;
Fig. 2 is the structural representation in A-A cross section in Fig. 1;
Fig. 3 is the enlarged diagram in C region in Fig. 2;
Fig. 4 is the process flow diagram of carbon anode roasting furnace.
1 channel-section steel, 2 screen clothes, 3 bell frameworks, 4 fire retardants, 5 fixed mounts, 6 depression bars, 7 fixation clips, 8 movable pressing boards, 9 fibrofelts, 10 axle sleeves, 11 cams in figure.
Detailed description of the invention
As shown in Figure 1, Figure 2, Figure 3 and Figure 4: a kind of energy-saving and emission-reduction method of carbon anode roasting furnace, concrete grammar measure is as follows:
1) roaster sealing
1-1, first, we confirm bell length and width size according to the size of each furnace chamber length and width of roaster, and the temperature according to the boiler face heat radiation of moving back stove high temperature furnace chamber confirms bell height dimension, thus obtains the size of bell length, width and height;
1-2, make special boiler face Sealing furnace lid according to bell size, some channel-section steels 1 are used to be fixed on bell framework 3 by screen cloth 2, fire retardant 4 is positioned on the fixed mount 5 bottom bell framework 3, and be fixed by the depression bar 6 of bell framework 3 side, arrange fibrofelt 9 between fixation clip 7 bottom bell framework 3 and movable pressing board 8, fibrofelt 9 is fixed by the cam 11 be arranged on the axle sleeve 10 bottom bell framework 3;
1-3, special boiler face Sealing furnace cover in each operational system method of operating of roaster:
1.3.1, pre-install after smoke discharge frame on 1 and prepackage 2 furnace chambers and cover special furnace face sealing bell;
1.3.2 on preheating furnace chamber 1P, 2P, 3P, cover special furnace face sealing bell;
1.3.3, stove high temperature furnace chamber C1, C2 cover special furnace face sealing bell moving back;
1.3.4, each special boiler face Sealing furnace lid moved forward along with the system cloud gray model cycle;
2) technological operation optimization
2-1, preheating furnace chamber 1P programming rate is brought up to 12 DEG C/h from 9 DEG C/h; Preheating furnace chamber 1P terminal temperature is brought up to 800 DEG C from 550 DEG C, terminal temperature is preheating furnace chamber hole flue-gas temperature, make preheating furnace chamber 1P, 2P, 3P products temperature and quirk flue-gas temperature gap more than 280 DEG C, guarantee when volatile matter is discharged, fire path temperature reaches more than burning-point, and volatile matter can be burnt cmpletely;
The spray penetration of 2-2, flame must reach 0.35 times of the quirk degree of depth, the homogeneous temperature up and down of guarantee quirk;
2-3, insert the long thermocouple of 1.5m at each preheating furnace chamber the 2nd hopper respectively, control preheating furnace chamber 1P, 2P, 3P products temperature and fire path temperature gap more than 280 DEG C, adjust negative pressure according to it.
Claims (1)
1. an energy-saving and emission-reduction method for carbon anode roasting furnace, is characterized in that concrete grammar measure is as follows:
1) roaster sealing
1-1, first, we confirm bell length and width size according to the size of each furnace chamber length and width of roaster, and the temperature according to the boiler face heat radiation of moving back stove high temperature furnace chamber confirms bell height dimension, thus obtains the size of bell length, width and height;
1-2, make special boiler face Sealing furnace lid according to bell size, some channel-section steels are used to be fixed on by screen cloth on bell framework, fire retardant is positioned on the fixed mount of bell base of frame, and be fixed by the depression bar of bell framework side, arrange fibrofelt between the fixation clip of bell base of frame and movable pressing board, fibrofelt is fixed by the cam be arranged on the axle sleeve of bell base of frame;
1-3, special boiler face Sealing furnace cover in each operational system method of operating of roaster:
1.3.1, pre-install after smoke discharge frame on furnace chamber and cover special furnace face sealing bell;
1.3.2, special boiler face Sealing furnace lid on preheating furnace chamber upper cover;
1.3.3, special boiler face Sealing furnace lid on stove high temperature furnace chamber upper cover is being moved back;
1.3.4, each special boiler face Sealing furnace lid moved forward along with the system cloud gray model cycle;
2) technological operation optimization
2-1, preheating furnace chamber programming rate is brought up to 12 DEG C/h from 9 DEG C/h; Preheating furnace chamber terminal temperature is brought up to 800 DEG C from 550 DEG C, terminal temperature is preheating furnace chamber hole flue-gas temperature, make each preheating furnace chamber products temperature and quirk flue-gas temperature gap more than 280 DEG C, guarantee when volatile matter is discharged, fire path temperature reaches more than burning-point, and volatile matter can be burnt cmpletely;
The spray penetration of 2-2, flame must reach 0.35 times of the quirk degree of depth, the homogeneous temperature up and down of guarantee quirk;
2-3, insert thermocouple at each preheating furnace chamber the 2nd hopper respectively, control each preheating furnace chamber products temperature and fire path temperature gap more than 280 DEG C, adjust negative pressure according to it.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410121018.7A CN103868349B (en) | 2014-03-21 | 2014-03-21 | The energy-saving and emission-reduction method of carbon anode roasting furnace |
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| CN201410121018.7A CN103868349B (en) | 2014-03-21 | 2014-03-21 | The energy-saving and emission-reduction method of carbon anode roasting furnace |
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| CN103868349B true CN103868349B (en) | 2015-09-30 |
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| CN201210012Y (en) * | 2008-02-26 | 2009-03-18 | 中国铝业股份有限公司 | Fire hole cover for calcining kiln |
| CN201545918U (en) * | 2009-11-11 | 2010-08-11 | 中铝国际技术发展有限公司 | Aluminum electrolytic tank cover plate structure |
| CN201809456U (en) * | 2010-08-18 | 2011-04-27 | 中国铝业股份有限公司 | Horizontal cover sealing device for aluminum electrolysis cell |
| GB201102023D0 (en) * | 2011-02-04 | 2011-03-23 | Metalysis Ltd | Electrolysis method, apparatus and product |
| CN102976774B (en) * | 2012-11-26 | 2014-06-11 | 中国铝业股份有限公司 | Heat-insulating and sealing material for inert-anode aluminum electrolysis cell and preparation method thereof |
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