CN104457301A - Furnace gas sensible heat utilization system of airtight submerged arc furnace - Google Patents

Furnace gas sensible heat utilization system of airtight submerged arc furnace Download PDF

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Publication number
CN104457301A
CN104457301A CN201410834551.8A CN201410834551A CN104457301A CN 104457301 A CN104457301 A CN 104457301A CN 201410834551 A CN201410834551 A CN 201410834551A CN 104457301 A CN104457301 A CN 104457301A
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CN
China
Prior art keywords
furnace
furnace gas
temperature
fan
gas
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Pending
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CN201410834551.8A
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Chinese (zh)
Inventor
赵昕哲
李海峰
侯晓伟
魏宏鹏
田雨
王洪宝
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Dalian Huarui Heavy Industry Group Co Ltd
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Dalian Huarui Heavy Industry Group Co Ltd
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Priority to CN201410834551.8A priority Critical patent/CN104457301A/en
Publication of CN104457301A publication Critical patent/CN104457301A/en
Pending legal-status Critical Current

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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/25Process efficiency

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  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)

Abstract

A furnace gas sensible heat utilization system of an airtight submerged arc furnace is characterized by comprising a settling chamber, a sensible heat recovery device, a temperature regulating device, a bag-type dust remover, a gas purifying fan and a variable-frequency fan which are connected in sequence, wherein the temperature regulating device is further connected with a booster fan. The booster fan is in linkage with an airtight furnace hearth pressure gauge and is connected with an electric control PID, and the gas purifying fan is in linkage with the bag-type dust remover and is also connected with the electric control PID. The defect that furnace gas of the airtight submerged arc furnace in the prior art is subjected to temperature reduction through air cooling or water cooling to reach the usage temperature of the dust remover and then is subjected to dust removal purification, accordingly most of waste heat is wasted and meanwhile a large amount of energy are further consumed for providing energy required by furnace gas cooling is overcome, and the furnace gas sensible heat utilization system can directly recover sensible heat of the airtight submerged arc furnace, enables furnace gas temperature to be reduced to reach the usage temperature of the dust remover, saves energy through waste heat recovery, reduces the smelting production cost of the airtight submerged arc furnace, meanwhile is high in dust removal efficiency, reduces particulate matter emission and enables purified furnace gas to reach the national environmental protection emission standard.

Description

The furnace gas sensible heat utilization system of closed submerged stove
Technical field
The present invention relates to a kind of closed submerged stove flue gas cleaning and utilize technology.
Background technology
Inadequate natural endowment is there is in domestic closed submerged stove smelting industry in energy-saving and environmental protection.In furnace gas process, up to the dust-laden gas of about 400 DEG C, have to pass through cooling process, just can enter in cleaner and carry out dedusting.Current cool-down method mainly adopts air cooling or water-cooled, and heat is wasted, and also needs the energy of at substantial to provide the energy cooled required for furnace gas simultaneously, is unfavorable for energy-conservation.There is the problem that energy consumption is high, pollution is heavy simultaneously.Since Eleventh Five-Year Plan, China's mine heat furnace smelting industry strengthens the research and development of energy utilization technology and environmental protection technology, but closed submerged stove furnace gas heat energy utilization and purification techniques not yet obtain ripe and unified method so far.Closed submerged stove burner gas residual heat reclaims and purification techniques is also a difficult problem in developed country.The problems such as its difficulty is that flue-gas temperature is high, carbon monoxide content is high, variations in temperature is large, dangerous property, and dust is thin, sticky, light, tar is easily separated out, bring sizable difficulty to furnace gas udst separation.
The method of flue gas cleaning used in prior art is all make furnace gas by air cooling or water-cooled cooling, it is made to reach condition needed for dry method dust, no matter but be air cooling or water-cooling process, all make a large amount of waste heats slatterning in vain, also need the energy of at substantial to provide the energy cooled required for furnace gas simultaneously, be unfavorable for energy-conservation.
Summary of the invention
For solving the problems of the technologies described above, the present invention proposes following technical scheme: a kind of furnace gas sensible heat utilization system of closed submerged stove, there is following characteristics: it comprises the expansion chamber, heat recovering device, temperature-adjusting device, sack cleaner, pure qi (oxygen) blower fan and the frequency conversion fan that are linked in sequence, and temperature-adjusting device is also connected with booster fan.Expansion chamber is made up of shell and internal layer heat preserving and insulating material.Heat recovering device forms by the heat pipe arranged between furnace gas entrance and furnace gas export and with the drum of steam (vapor) outlet.Temperature-adjusting device comprises the temperature adjustment housings being provided with crustless sandwich, this side, temperature adjustment housings top is provided with dust-laden gas entrance and upper top is provided with the vertical dust-laden gas mouth of pipe, is provided with tempering air entrance and below is provided with tempering air outlet above crustless sandwich.Booster fan is chain with sealed furnace furnace pressure table and be connected with automatically controlled PID, and pure qi (oxygen) blower fan is also connected with automatically controlled PID with sack cleaner pressure interlock.
Adopt the heat recovering device that the present invention of technique scheme is made up of drum, many group heat pipes and housing, directly can reclaim the sensible heat of closed submerged stove furnace gas, furnace gas temperature is made to drop to the serviceability temperature of cleaner, save the energy by waste heat recovery and reduce mine heat furnace smelting production cost, efficiency of dust collection is high simultaneously, reduce the discharge of particle, make flue gas cleaning reach state environmental emissioning standard.
Accompanying drawing explanation
Fig. 1 is the furnace gas sensible heat utilization system process figure of the closed submerged stove of the present invention;
Fig. 2 is that in Fig. 1, sequence number is the parts of 3 and the structural representation of heat recovering device;
Fig. 3 is that in Fig. 1, sequence number is the parts of 4 and thermostatic structural representation;
Fig. 4 is furnace gas pressure P ID control system schematic diagram;
In figure: 1. closed submerged stove, 2. expansion chamber, 3. heat recovering device, 3.1. furnace gas entrance, 3.2. steam (vapor) outlet, 3.3. heat pipe, 3.4. drum, 3.5. furnace gas export, 4. temperature-adjusting device, the 4.1. dust-laden gas mouth of pipe, 4.2. dust-laden gas entrance, 4.3. temperature adjustment housings, 4.4. crustless sandwich, 4.5. tempering air outlet, 4.6. tempering air entrance, 5. booster fan, 6. sack cleaner, 7. pure qi (oxygen) blower fan, 8. frequency conversion fan; Q. represent furnace gas, RQ. represents heat steam, and TQ. represents tempering air.
Detailed description of the invention
The furnace gas sensible heat utilization system of this closed submerged stove, there is following characteristics: comprise the expansion chamber 2, heat recovering device 3, temperature-adjusting device 4, sack cleaner 6, pure qi (oxygen) blower fan 7 and the frequency conversion fan 8 that are linked in sequence, temperature-adjusting device 4 is also connected with booster fan 5.Expansion chamber 2 is made up of shell and internal layer heat preserving and insulating material.Heat recovering device 3 forms by the heat pipe 3.3 arranged between furnace gas entrance 3.1 and furnace gas export 3.5 and with the drum 3.4 of steam (vapor) outlet 3.2, ensures its seal, No leakage after assembling.Temperature-adjusting device 4 comprises the temperature adjustment housings 4.3 being provided with crustless sandwich 4.4, this side, temperature adjustment housings 4.3 top is provided with dust-laden gas entrance 4.2 and upper top is provided with the vertical dust-laden gas mouth of pipe 4.1, is provided with tempering air entrance 4.6 and below is provided with tempering air outlet 4.5 above crustless sandwich 4.4.Booster fan 5 is chain with sealed furnace furnace pressure table P1 and be connected with automatically controlled PID, and pure qi (oxygen) blower fan 7 is also connected with automatically controlled PID with sack cleaner pressure P 2 is chain.Booster fan 5 and frequency conversion fan 8 are all centrifugal fans.Sack cleaner 6 is made up of 3 ~ 4 rooms, and each room is independently, can on-bne repair, room number need according to furnace gas amount and technique and determine.
Closed submerged stove 1 can produce the high temperature dust calcium carbide furnace gas of 500 ~ 600 DEG C in smelting process; first by expansion chamber 2; the internal layer heat preserving and insulating material of expansion chamber 2 can ensure that the heat of furnace gas does not scatter and disappear, and by the furnace gas of expansion chamber 2, can remove bulky grain dust in furnace gas.Through the furnace gas of preliminary purification, enter heat recovering device 3 and carry out heat exchange, produce 0.5 ~ 1MPa saturated vapor, for need of living and producing, then enter temperature-adjusting device 4 and carry out temperature adjustment.Temperature-adjusting device 4 is connected with frequency conversion fan 8 to regulate temperature, the temperature of furnace gas is made to drop to about 220 DEG C, meet the serviceability temperature requirement entering sack cleaner 6, by booster fan 5, furnace gas is sent into sack cleaner 6 to filter, purified gas to reach after national dust-laden standard through pure qi (oxygen) blower fan 7, delivers to user or storage.Furnace gas after filtration is extracted out by centrifugal pure qi (oxygen) blower fan 7 and is sent into next stage equipment.
Owing to containing a large amount of CO in furnace gas, require very high to process system seal, centrifugal booster fan 5 is chain with sealed furnace furnace pressure P1, centrifugal pure qi (oxygen) blower fan 7 and sack cleaner pressure P 2 chain, controlled by electric PID, guarantee system is run in pressure-fired situation, and a complete set of process system equipment need use nitrogen as technique gas simultaneously, to ensure the security of whole system.

Claims (1)

1. the furnace gas sensible heat utilization system of a closed submerged stove, it is characterized in that: comprise the expansion chamber (2), heat recovering device (3), temperature-adjusting device (4), sack cleaner (6), pure qi (oxygen) blower fan (7) and the frequency conversion fan (8) that are linked in sequence, described temperature-adjusting device (4) is also connected with booster fan (5), described expansion chamber (2) is made up of shell and internal layer heat preserving and insulating material, described heat recovering device (3) forms by the heat pipe (3.3) arranged between furnace gas entrance (3.1) and furnace gas export (3.5) and with the drum (3.4) of steam (vapor) outlet (3.2), described temperature-adjusting device (4) comprises the temperature adjustment housings (4.3) being provided with crustless sandwich (4.4), this temperature adjustment housings (4.3) side, top is provided with dust-laden gas entrance (4.2) and upper top is provided with the vertical dust-laden gas mouth of pipe (4.1), described crustless sandwich (4.4) top is provided with tempering air entrance (4.6) and below is provided with tempering air outlet (4.5), described booster fan (5) is chain with sealed furnace furnace pressure table P1 and be connected with automatically controlled PID, described pure qi (oxygen) blower fan (7) is also connected with automatically controlled PID with sack cleaner pressure P 2 is chain.
CN201410834551.8A 2014-12-28 2014-12-28 Furnace gas sensible heat utilization system of airtight submerged arc furnace Pending CN104457301A (en)

Priority Applications (1)

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CN201410834551.8A CN104457301A (en) 2014-12-28 2014-12-28 Furnace gas sensible heat utilization system of airtight submerged arc furnace

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108731487A (en) * 2018-04-27 2018-11-02 安徽宸瑞节能环保科技工程有限公司 A kind of method and device for preventing furnace gas tar to be precipitated in mineral hot furnace dust pelletizing system

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6173002B1 (en) * 1999-04-21 2001-01-09 Edgar J. Robert Electric arc gasifier as a waste processor
CN201239593Y (en) * 2008-08-11 2009-05-20 宁夏三友环保设备制造有限公司 Flue gas-purifying and dust-removing apparatus for enclosed ore furnace
CN201239671Y (en) * 2008-08-11 2009-05-20 宁夏三友环保设备制造有限公司 Wind-cooling cyclone separating device
CN101539371A (en) * 2009-04-23 2009-09-23 上海宝钢工程技术有限公司 First flue gas dust removal and waste heat recovery system for electric stove
CN202024617U (en) * 2011-04-26 2011-11-02 安徽中企能源管理有限公司 Flue gas waste heat utilization system for arc furnace
CN102445085A (en) * 2010-10-08 2012-05-09 王全祥 High-temperature flue gas and dust dry purification and waste heat recovery process for ore furnace
CN202316145U (en) * 2011-09-23 2012-07-11 重庆川然节能技术有限公司 Air-cooled type cyclone dust collector
CN202470793U (en) * 2012-03-08 2012-10-03 王正新 Equipment special for using waste heat of high dust content flue gas of submerged arc furnace in cascade mode and removing dust
CN103017553A (en) * 2011-09-22 2013-04-03 无锡市东优环保科技有限公司 Regenerative submerged arc furnace flue gas waste heat power generation method
CN204359150U (en) * 2014-12-28 2015-05-27 大连华锐重工集团股份有限公司 The furnace gas sensible heat utilization system of closed submerged stove

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6173002B1 (en) * 1999-04-21 2001-01-09 Edgar J. Robert Electric arc gasifier as a waste processor
CN201239593Y (en) * 2008-08-11 2009-05-20 宁夏三友环保设备制造有限公司 Flue gas-purifying and dust-removing apparatus for enclosed ore furnace
CN201239671Y (en) * 2008-08-11 2009-05-20 宁夏三友环保设备制造有限公司 Wind-cooling cyclone separating device
CN101539371A (en) * 2009-04-23 2009-09-23 上海宝钢工程技术有限公司 First flue gas dust removal and waste heat recovery system for electric stove
CN102445085A (en) * 2010-10-08 2012-05-09 王全祥 High-temperature flue gas and dust dry purification and waste heat recovery process for ore furnace
CN202024617U (en) * 2011-04-26 2011-11-02 安徽中企能源管理有限公司 Flue gas waste heat utilization system for arc furnace
CN103017553A (en) * 2011-09-22 2013-04-03 无锡市东优环保科技有限公司 Regenerative submerged arc furnace flue gas waste heat power generation method
CN202316145U (en) * 2011-09-23 2012-07-11 重庆川然节能技术有限公司 Air-cooled type cyclone dust collector
CN202470793U (en) * 2012-03-08 2012-10-03 王正新 Equipment special for using waste heat of high dust content flue gas of submerged arc furnace in cascade mode and removing dust
CN204359150U (en) * 2014-12-28 2015-05-27 大连华锐重工集团股份有限公司 The furnace gas sensible heat utilization system of closed submerged stove

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108731487A (en) * 2018-04-27 2018-11-02 安徽宸瑞节能环保科技工程有限公司 A kind of method and device for preventing furnace gas tar to be precipitated in mineral hot furnace dust pelletizing system

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Application publication date: 20150325