CN1869569A - Smoke removing, temp lowering, afterheat using and recovering system in arc furnace and its dust removing technology - Google Patents
Smoke removing, temp lowering, afterheat using and recovering system in arc furnace and its dust removing technology Download PDFInfo
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- CN1869569A CN1869569A CNA2006100880721A CN200610088072A CN1869569A CN 1869569 A CN1869569 A CN 1869569A CN A2006100880721 A CNA2006100880721 A CN A2006100880721A CN 200610088072 A CN200610088072 A CN 200610088072A CN 1869569 A CN1869569 A CN 1869569A
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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
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Abstract
The invention relates to a smoke discharging and cooling afterheat recycling system and the dust removal technology in arc furnace. It connects the heat pipe steam generator with burning sedimentation chamber through insulated pipeline. The heat pipe steam generator connects to dust remover that connects the main blower fan. The main blower fan connects to exhaust mast. The smoke exhausts from arc furnace and coming into burning sedimentation chamber after mixing with cold wind in water cooling sliding sleeve. The smoke from the burning sedimentation chamber would come into the heat pipe steam generator. After taking dust removing to the smoke from the heat pipe steam generator, the main blower fan would press into exhaust mast and exhaust into atmosphere. The invention could effectively cool the high temperature smoke and recycle the heat energy in smoke, and improve the dust removing ability. It could lower running cost, and satisfy normal producing request.
Description
Technical field
The present invention relates to smoke discharging and cooling UTILIZATION OF VESIDUAL HEAT IN recovery system and dust collecting process thereof in a kind of electric arc furnaces, specifically cooling down high-temperature flue gas efficiently reclaims the heat energy in the flue gas to greatest extent, improves dust collection capacity, belongs to electric arc furnaces dedusting technology field.
Background technology
Smoke discharging in the electric-arc furnace steelmaking (being discharged by bell the 4th hole or second hole) temperature is very high, generally about 1200 ℃, and could dedusting after must at first cooling.At present, adopt following several modes that cool usually: directly sneak into cold wind, water-cooled flue, air-cooled, the cooling etc. of spraying of mechanical cooler.All there are many shortcomings in the above-mentioned type of cooling: 1, directly sneak into the cold wind type of cooling: the air quantity increase after its cooling is very big, needs to increase the initial cost and the operating cost of system pipeline, blower fan and motor, deduster.This method generally is used for temperature at the flue gas below 300 ℃.2, the water-cooled flue type of cooling: need a large amount of cooling waters during its cooling; Flue weight is big; Need take and dispose the auxilliary facility of public affairs of cooling water.This method is only applicable to temperature at the flue gas more than 500 ℃, limited by the place, generally can not dispose too much.3, the air-cooled type of cooling of mechanical cooler: this method need increase cooling blower; Cooling-down effect is poor.Its input gas temperature should not be greater than 500 ℃, and cooling is limited in scope; Stifled easily ash influences heat exchange and causes system deterioration.4, the spraying type of cooling: consume cooling water, increase the content of water in the flue gas, not only make the easy dewfall of dust-removal cloth-bag, also cause the cloth bag hydrolysis to lose efficacy easily.So this method is very high to the control accuracy requirement of injection flow rate, is subjected to filter bag performance limitations smoke moisture unsuitable excessive, injection flow rate can not be too much, so cooling is limited in scope.
Because above shortcoming is used in combination the above-mentioned type of cooling mostly in the engineering, cause the cooling cooling system complexity of flue gas, equipment is huge, and the operation maintenance workload is big.Simultaneously, the above-mentioned type of cooling all is simple cooling, causes a large amount of heat energy in the high-temperature flue gas to be wasted.In recent years, water row tube formula natural circulation boiler is arranged in electric arc furnaces in the cooling dedusting of high-temperature flue gas and is used to some extent, can reclaim fume afterheat like this and produce that steam is used for producing, life.But this type boiler belongs to the partition heat exchange, and the high temperature ash-laden gas flows outside heat exchanger tube, and steam water interface flows in heat exchanger tube.In case the abominable heat exchanger tube of condition of work damages, high-temperature flue gas just directly mixes with steam water interface, the maintenance of being forced to stop production.In addition, this type boiler can not solve faults such as stifled ash, cold end corrosion well in actual motion, has influenced the ordinary production of enterprise.
Summary of the invention
The objective of the invention is to overcome above-mentioned weak point, thereby provide a kind of capital equipment that adopts heat pipe steam generator as cooling, recovery waste heat, cooling down high-temperature flue gas efficiently, can also reclaim the heat energy in the flue gas to greatest extent, improve dust collection capacity, and do not influence the dust collecting process of the stable and continuous interior smoke discharging and cooling UTILIZATION OF VESIDUAL HEAT IN of electric arc furnaces of electric-arc furnace steelmaking production.
Main solution of the present invention is achieved in that
The present invention adopts electric arc furnaces 1 to connect four hole water-cooled sliding sleeves 2, four hole water-cooled sliding sleeves 2 connect combustion settling chamber 3, feature is to adopt heat pipe steam generator 5 to be connected with combustion settling chamber 3 by utilidor 4, heat pipe steam generator 5 is connected with deduster 10 by pipeline, deduster 10 connects main air blower 11 by pipeline, and main air blower 11 is connected with aiutage 12.
Connect main feed water pipe road 9 on the heat pipe steam generator 5 of the present invention, main feed water pipe road 9 connects main steam line 7, and main steam line 7 is connected with steam accumulator 8.
Heat pipe steam generator 5 of the present invention connects booster fan 13, and booster fan 13 is connected deduster 10 in the lump with outer discharge pipe 6.
The dust collecting process step that the smoke discharging and cooling UTILIZATION OF VESIDUAL HEAT IN reclaims in the electric arc furnaces of the present invention is as follows:
Smoke discharging is discharged in the electric arc furnaces 1 of the present invention, sneaks into cold wind through water-cooled sliding sleeve 2, enters combustion settling chamber 3 behind the burning CO gas, and the carbon monoxide in the flue gas is fully burnt, and regulates control exit gas temperature temperature and is less than or equal to 800 ℃; The flue gas that is come out by combustion settling chamber 3 directly enters heat pipe steam generator 5 through insulation flue 4, finishes heat exchange, discharges when temperature is less than or equal to 120 ℃; The flue gas that heat pipe steam generator 5 comes out directly enter or with enter deduster 10 dedustings after other flue gases mix after, be pressed into aiutage 12 by main air blower 11 and enter atmosphere.
Heat pipe steam generator of the present invention 5 absorbs and produces steam behind the fume afterheats and supply with main feed water pipe road 9, enters steam accumulator 8 by main steam line 7, and steam is used for producing after regulating, life or outer confession.
The flue gas that heat pipe steam generator 5 of the present invention comes out is mixed by booster fan 13 and outer discharge pipe 6 flue gases and enters deduster 10 after dedusting, is pressed into aiutage 12 by main air blower 11 and enters atmosphere.
Heat pipe steam generator 5 of the present invention produces steam supply main feed water pipe road 9 after absorbing fume afterheat, is directly used in production, life or outer the confession by main steam line 7.
After heat pipe steam generator 5 coolings of the present invention, when its temperature was less than or equal to 120 ℃, deduster 10 cloth bag materials adopted the normal temperature filtrate to make; Its temperature is: in the time of 120～200 ℃, deduster 10 cloth bag materials adopt high temperature resistance filtration material to make.
Heat pipe steam generator of the present invention is as the capital equipment of cooling, recovery waste heat.Heat pipe steam generator is a technology maturation, its own extensive use and secondary partition heat transmission equipment.Heat pipe steam generator is to be combined by some columniform heat-pipe elements (heat-exchanging tube bundle).Its basic structure: the heating section of heat pipe places in the high-temperature flue, the horizontal heat pipe heating section of plunderring of flue gas, and the heat release section of heat-pipe elements is inserted in water-vapour system.Its operation principle: the heat of high-temperature flue gas is passed to the intrasystem saturation water of water-vapour and is made its vaporization by heat pipe, and institute's producing steam (vapour, aqueous mixtures) reaches drum through vapor uptake, exports through main steam valve after concentrating separation again.Because water-vapour system constantly imported heat by heat pipe, finish basic vapour-water circulation like this, make cooling high-temperature fume, finish heat exchange and make water be converted into steam, be used for industrial production or domestic life by the rising and the decline of outside vapour-waterpipe.Because the existence of heat pipe makes being heated and circulating and separating and independently be present in outside the high-temperature flue gas with thermal source fully of this water-vapour system, water-vapour system is not subjected to directly washing away of high-temperature flue gas.The input gas temperature of heat pipe steam generator can reach 800 ℃, and exit gas temperature is generally 120 ℃, and as water content or seldom moisture not in the flue gas, temperature also can further reduce.Heat-pipe elements is arranged very flexible in steam generator, and the actual internal area of adjusting flue gas is very convenient, can make the flue gas uniform flow by heat-exchanging tube bundle like this, reduces dust stratification effectively; By adjusting the area of single heat-pipe elements heating section and heat release section, can improve the heat pipe wall surface temperature, avoided flue gas in heat pipe wall dewfall effectively, prevented stifled ash.This shows that heat pipe steam generator not only can reduce flue-gas temperature, reclaim flue gas heat to greatest extent, can also make cold and hot fluid separately effectively, safe heat exchange.
Compared with the prior art the present invention has the following advantages:
The present invention reclaims fume afterheat to greatest extent, produces steam and is used for producing, living; Can satisfy the requirement of recycling economy, meet the national policy of energy-conserving and environment-protective; The cooling scope is big, only just can simplify system configuration for the equipment combination of heat exchange weak effects such as band high-temperature water cooling flue, mechanical cooler, spray cooler with parts; It is few to sneak into cold blast rate, has reduced systematic air flow, thereby has reduced operating cost; Heat pipe steam generator is reliable, stable, satisfies the requirement of ordinary production; Applied range, the above electric arc furnaces dedusting of 30t/h all can be adopted; Adopt the insulation flue, reduced water-cooled flue, reduce cooling water inflow and maintenance cost.
Description of drawings
Fig. 1 is a flue gas cool-down UTILIZATION OF VESIDUAL HEAT IN dust collecting process flow chart of the present invention (embodiment one).
Fig. 2 is a flue gas cool-down UTILIZATION OF VESIDUAL HEAT IN dust collecting process flow chart of the present invention (embodiment two).
Fig. 3 is a flue gas cool-down UTILIZATION OF VESIDUAL HEAT IN dust collecting process flow chart of the present invention (embodiment three).
The specific embodiment
Embodiment during following the present invention incites somebody to action in conjunction with the accompanying drawings is further described:
The present invention mainly is made up of electric arc furnaces 1, water-cooled sliding sleeve 2, combustion settling chamber 3, insulation flue 4, heat pipe steam generator 5, outer discharge pipe 6, main steam line 7, steam accumulator 8, main feed water pipe road 9, deduster 10, main air blower 11, aiutage 12, booster fan 13 etc.
Embodiment one:
The smoke discharging and cooling UTILIZATION OF VESIDUAL HEAT IN reclaims dust pelletizing system in certain 30t/h electric furnace arrangement for producing steel.
The embodiment of the invention adopts electric arc furnaces 1 to connect four hole water-cooled sliding sleeves 2, four hole water-cooled sliding sleeves 2 connect combustion settling chamber 3, heat pipe steam generator 5 is connected with combustion settling chamber 3 by utilidor 4, heat pipe steam generator 5 is connected with deduster 10 by pipeline, deduster 10 connects main air blower 11 by pipeline, and main air blower 11 is connected with aiutage 12.Connect main feed water pipe road 9 on heat pipe steam generator 5, main feed water pipe road 9 connects main steam line 7, and main steam line 7 is connected with steam accumulator 8.Outer discharge pipe 6 is connected electric arc furnaces 1 top.
As shown in Figure 1: the dust collecting process step that the smoke discharging and cooling UTILIZATION OF VESIDUAL HEAT IN reclaims in the electric arc furnaces of the present invention is as follows: smoke discharging is discharged by the 4th hole in the electric arc furnaces 1, sneaks into cold wind through water-cooled sliding sleeve 2, enters combustion settling chamber 3 behind the burning CO gas; The effect of combustion settling chamber 3 is: reduce flue gas flow rate, make the big dust particle sedimentation of carrying in the flue gas, and suitably sneak into cold wind and finally burn CO gas, regulate exit gas temperature and be not more than 800 ℃; The flue gas that is come out by combustion settling chamber 3 directly enters heat pipe steam generator 5 through utilidor 4 and finishes heat exchange with feedwater, and temperature is reduced to about 120 ℃ and discharged; Last flue gas enters deduster 10 after dedusting, is pressed into aiutage 12 by main air blower 11 and enters atmosphere.Simultaneously, main feed water pipe road 9 produces steam after heat pipe steam generator 5 absorbs fume afterheats, enter steam accumulator 8 by main steam line 7, through regulating after outer for stable, continuously, the parameter steam that meets customer requirements is used for production, lives.This mode is stable in steam pressure, traffic requirement, adopts under the continuous situation.
Embodiment two:
The smoke discharging and cooling UTILIZATION OF VESIDUAL HEAT IN reclaims dust pelletizing system in certain 45t/h electric furnace arrangement for producing steel.
The embodiment of the invention adopts electric arc furnaces 1 to connect four hole water-cooled sliding sleeves 2, four hole water-cooled sliding sleeves 2 connect combustion settling chamber 3, heat pipe steam generator 5 is connected with combustion settling chamber 3 by utilidor 4, heat pipe steam generator 5 connects booster fan 13 by pipeline, booster fan 13 is connected deduster 10 in the lump with the outer discharge pipe 6 that is connected electric arc furnaces 1 top, deduster 10 connects main air blower 11 by pipeline, and main air blower 11 is connected with aiutage 12.Connect main feed water pipe road 9 on heat pipe steam generator 5, main feed water pipe road 9 connects main steam line 7, and main steam line 7 is connected with steam accumulator 8 by pipeline.
As shown in Figure 2: the dust collecting process step that the smoke discharging and cooling UTILIZATION OF VESIDUAL HEAT IN reclaims in the electric arc furnaces of the present invention is as follows: smoke discharging is discharged by the 4th hole in the electric arc furnaces 1, sneaks into cold wind through water-cooled sliding sleeve 2, enters combustion settling chamber 3 behind the burning CO gas; The effect of combustion settling chamber 3 is: reduce flue gas flow rate, make the big dust particle sedimentation of carrying in the flue gas, and suitably sneak into cold wind and finally burn CO gas, regulate exit gas temperature and be not more than 800 ℃; The flue gas that is come out by combustion settling chamber 3 directly enters heat pipe steam generator 5 through utilidor 4 and finishes heat exchange with feedwater, and temperature is reduced to about 120 ℃ and discharged; Last flue gas is mixed by booster fan 13 and outer discharge pipe 6 flue gases and enters deduster 10 after dedusting, is pressed into aiutage 12 by main air blower 11 and enters atmosphere.Simultaneously, main feed water pipe road 9 produces steam after heat pipe steam generator 5 absorbs fume afterheats, enter steam accumulator 8 by main steam line 7, steam through regulating after outer for stable, continuously, the parameter steam that meets customer requirements is used for production, lives.
Embodiment three:
The smoke discharging and cooling UTILIZATION OF VESIDUAL HEAT IN reclaims dust pelletizing system in certain 50t/h electric furnace arrangement for producing steel.
The embodiment of the invention adopts electric arc furnaces 1 to connect four hole water-cooled sliding sleeves 2, four hole water-cooled sliding sleeves 2 connect combustion settling chamber 3, heat pipe steam generator 5 is connected with combustion settling chamber 3 by utilidor 4, heat pipe steam generator 5 is connected with deduster 10 by pipeline, deduster 10 connects main air blower 11 by pipeline, and main air blower 11 is connected with aiutage 12.Connect main feed water pipe road 9 on heat pipe steam generator 5, main feed water pipe road 9 connects main steam line 7.Outer discharge pipe 6 is connected electric arc furnaces 1 top.
As shown in Figure 3: the dust collecting process step that the smoke discharging and cooling UTILIZATION OF VESIDUAL HEAT IN reclaims in the electric arc furnaces of the present invention is as follows: smoke discharging is discharged by the 4th hole in the electric arc furnaces 1, sneaks into cold wind through water-cooled sliding sleeve 2, enters combustion settling chamber 3 behind the burning CO gas; The effect of combustion settling chamber 3 is: reduce flue gas flow rate, make the big dust particle sedimentation of carrying in the flue gas, and suitably sneak into cold wind and finally burn CO gas, regulate exit gas temperature and be not more than 800 ℃; The flue gas that is come out by combustion settling chamber 3 directly enters heat pipe steam generator 5 through utilidor 4 and finishes heat exchange with feedwater, and temperature is reduced to about 120 ℃ and discharged; Last flue gas enters deduster 10 after dedusting, is pressed into aiutage 12 by main air blower 11 and enters atmosphere.Simultaneously, main feed water pipe road 9 produces steam after heat pipe steam generator 5 absorbs fume afterheat, is used for production, life by the directly outer steam that supplies parameter to meet customer requirements of main steam line 7.This mode is not high in steam pressure, traffic requirement, or adopts under the steam situation about being incorporated into the power networks fully.
After heat pipe steam generator 5 coolings, when its temperature was less than or equal to 120 ℃, deduster 10 cloth bag materials adopted the normal temperature filtrate to make in the embodiment of the invention one, two, three; Its temperature is: in the time of 120～200 ℃, deduster 10 cloth bag materials adopt high temperature resistance filtration material to make.
Claims (8)
1, smoke discharging and cooling UTILIZATION OF VESIDUAL HEAT IN recovery system in a kind of electric arc furnaces, adopt electric arc furnaces (1) to connect four hole water-cooled sliding sleeves (2), four hole water-cooled sliding sleeves (2) connect combustion settling chamber (3), it is characterized in that adopting heat pipe steam generator (5) to be connected with combustion settling chamber (3) by utilidor (4), heat pipe steam generator (5) is connected with deduster (10) by pipeline, deduster (10) connects main air blower (11) by pipeline, and main air blower (11) is connected with aiutage (12).
2, smoke discharging and cooling UTILIZATION OF VESIDUAL HEAT IN recovery system in the electric arc furnaces according to claim 1, it is characterized in that described heat pipe steam generator (5) connects main feed water pipe road (9), main feed water pipe road (9) connects main steam line (7), and main steam line (7) is connected with steam accumulator (8).
3, smoke discharging and cooling UTILIZATION OF VESIDUAL HEAT IN recovery system in the electric arc furnaces according to claim 1 is characterized in that described heat pipe steam generator (5) connects booster fan (13), and booster fan (13) is connected deduster (10) in the lump with outer discharge pipe (6).
4, a kind of dust collecting process by smoke discharging and cooling UTILIZATION OF VESIDUAL HEAT IN recovery system in the described electric arc furnaces of claim 1, it is characterized in that adopting the interior smoke discharging of electric arc furnaces (1) to discharge, sneak into cold wind through water-cooled sliding sleeve (2), enter combustion settling chamber (3) behind the burning CO gas, carbon monoxide in the flue gas is fully burnt, regulate control exit gas temperature temperature and be less than or equal to 800 ℃; The flue gas that is come out by combustion settling chamber (3) directly enters heat pipe steam generator (5) through insulation flue (4), finishes heat exchange, discharges when temperature is less than or equal to 120 ℃; The flue gas that heat pipe steam generator (5) comes out directly enter or with enter deduster (10) dedusting after other flue gases mix after, be pressed into aiutage (12) by main air blower (11) and enter atmosphere.
5, the dust collecting process of smoke discharging and cooling UTILIZATION OF VESIDUAL HEAT IN recovery system in the electric arc furnaces according to claim 4, it is characterized in that producing steam supply main feed water pipe road (9) after heat pipe steam generator (5) absorbs fume afterheat, enter steam accumulator (8) by main steam line (7), steam is used for producing after regulating, life or outer confession.
6, the dust collecting process of smoke discharging and cooling UTILIZATION OF VESIDUAL HEAT IN recovery system in the electric arc furnaces according to claim 4, it is characterized in that flue gas that heat pipe steam generator (5) comes out is mixed by booster fan (13) and outer discharge pipe (6) flue gas enters deduster (10) after dedusting, is pressed into aiutage (12) by main air blower (11) and enters atmosphere.
7, the dust collecting process of smoke discharging and cooling UTILIZATION OF VESIDUAL HEAT IN recovery system in the electric arc furnaces according to claim 4, it is characterized in that producing steam supply main feed water pipe road (9) after heat pipe steam generator (5) absorbs fume afterheat, be directly used in production, life or outer the confession by main steam line (7).
8, the dust collecting process of smoke discharging and cooling UTILIZATION OF VESIDUAL HEAT IN recovery system in the electric arc furnaces according to claim 4, after it is characterized in that heat pipe steam generator (5) cooling, when its temperature was less than or equal to 120 ℃, deduster (10) cloth bag material adopted the normal temperature filtrate to make; Its temperature is: in the time of 120～200 ℃, deduster (10) cloth bag material adopts high temperature resistance filtration material to make.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2006100880721A CN100513962C (en) | 2006-06-22 | 2006-06-22 | Smoke removing, temp lowering, afterheat using and recovering system in arc furnace and its dust removing technology |
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| CNB2006100880721A CN100513962C (en) | 2006-06-22 | 2006-06-22 | Smoke removing, temp lowering, afterheat using and recovering system in arc furnace and its dust removing technology |
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| CN100513962C CN100513962C (en) | 2009-07-15 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101556036A (en) * | 2008-04-11 | 2009-10-14 | 无锡市东方环境工程设计研究所有限公司 | Method and special device for collecting surplus heat of iron alloy pouring |
| CN101576737B (en) * | 2008-05-08 | 2011-08-10 | 肖艳义 | Electric arc furnace energy-saving control method and system |
| CN102350160A (en) * | 2011-07-21 | 2012-02-15 | 浙江环益科技有限公司 | System for purifying flue gas produced by waste circuit board burning |
| CN103673643A (en) * | 2013-11-22 | 2014-03-26 | 宝钢集团广东韶关钢铁有限公司 | High-temperature flue gas waste heat recovery and dust extraction all-in-one device |
| CN104006666A (en) * | 2014-05-22 | 2014-08-27 | 江苏华德工业炉有限公司 | Industrial electric arc furnace waste heat utilizing and exhaust gas recycling device |
| CN112556437A (en) * | 2020-11-24 | 2021-03-26 | 天俱时工程科技集团有限公司 | System for converter secondary flue gas high efficiency entrapment utilizes waste heat |
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| CN102322746A (en) * | 2011-10-14 | 2012-01-18 | 孙慕文 | Electric arc furnace smoke radiation type waste heat boiler recovery system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101556036A (en) * | 2008-04-11 | 2009-10-14 | 无锡市东方环境工程设计研究所有限公司 | Method and special device for collecting surplus heat of iron alloy pouring |
| CN101576737B (en) * | 2008-05-08 | 2011-08-10 | 肖艳义 | Electric arc furnace energy-saving control method and system |
| CN102350160A (en) * | 2011-07-21 | 2012-02-15 | 浙江环益科技有限公司 | System for purifying flue gas produced by waste circuit board burning |
| CN102350160B (en) * | 2011-07-21 | 2013-11-06 | 浙江环益科技有限公司 | System for purifying flue gas produced by waste circuit board burning |
| CN103673643A (en) * | 2013-11-22 | 2014-03-26 | 宝钢集团广东韶关钢铁有限公司 | High-temperature flue gas waste heat recovery and dust extraction all-in-one device |
| CN103673643B (en) * | 2013-11-22 | 2015-06-17 | 宝钢集团广东韶关钢铁有限公司 | High-temperature flue gas waste heat recovery and dust extraction all-in-one device |
| CN104006666A (en) * | 2014-05-22 | 2014-08-27 | 江苏华德工业炉有限公司 | Industrial electric arc furnace waste heat utilizing and exhaust gas recycling device |
| CN112556437A (en) * | 2020-11-24 | 2021-03-26 | 天俱时工程科技集团有限公司 | System for converter secondary flue gas high efficiency entrapment utilizes waste heat |
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| CN100513962C (en) | 2009-07-15 |
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