CN101875992A - Device and method for removing dust from converter smoke by dry method and recycling waste heat - Google Patents

Device and method for removing dust from converter smoke by dry method and recycling waste heat Download PDF

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Publication number
CN101875992A
CN101875992A CN2009102438293A CN200910243829A CN101875992A CN 101875992 A CN101875992 A CN 101875992A CN 2009102438293 A CN2009102438293 A CN 2009102438293A CN 200910243829 A CN200910243829 A CN 200910243829A CN 101875992 A CN101875992 A CN 101875992A
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CN
China
Prior art keywords
flue
gas
converter
gravity settling
heat pipe
Prior art date
Application number
CN2009102438293A
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Chinese (zh)
Inventor
贾志立
刘浏
黄芳
王晋元
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钢铁研究总院
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Publication date
Application filed by 钢铁研究总院 filed Critical 钢铁研究总院
Priority to CN2009102438293A priority Critical patent/CN101875992A/en
Publication of CN101875992A publication Critical patent/CN101875992A/en

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Abstract

The invention discloses a device and a method for removing dust from converter smoke by a dry method and recycling waste heat and belongs to the technical field of comprehensive utilization of the converter smoke. The device comprises a converter, a vaporizing and cooling flue, a gravity settling chamber, a flue, a heat exchanger, an electrostatic dust remover, an axial flow fan and a smoke diffusing tower or a gas chamber, wherein the gravity settling chamber is connected with the converter through the vaporizing and cooling flue and is connected with an efficient heat pipe exchanger through the flue; the heat exchanger is connected with the electrostatic dust remover through the flue; the electrostatic dust remover is connected with the axial flow fan through the flue; the axial flow fan is connected with the smoke diffusing tower or the gas chamber through the flue; and the lower ends of the gravity settling chamber, the efficient heat pipe exchanger and the static dust remover are all provided with an ash discharge port. The device and the method are suitable for all converters and have the advantages of improving the dust removing effect compared with the OG method, making the emission index of smoke concentration lower than 20 mg/m<3>, greatly saving the cooling water and recycling a large amount of physical heat of the smoke.

Description

Converter gas dry method dust and waste-heat recovery device and method thereof
Technical field
The invention belongs to converter gas comprehensive utilization technique field, a kind of converter gas dry method dust and waste-heat recovery device and method thereof particularly are provided.
Background technology
Present domestic converter gas dust collecting process adopts wet dedusting mostly, i.e. OG method, and minority adopts the LT method.These two kinds of today that method for dust removal is in short supply day by day at the energy, environmental requirement is more and more higher, there is weak point separately: do not reclaim come out physics heat in 950~1100 ℃ of flue gases in back of gasification cooling flue, employing spraying cooling water in flue gas is lowered the temperature, and consumes great amount of water resources and causes environmental pollution such as mud and sewage.
Summary of the invention
The object of the present invention is to provide a kind of converter gas dry method dust and waste-heat recovery device and method thereof, realized that efficiency of dust collection height, energy consumption are low, reclaim the gas quality height, flue gas waste heat recovery utilization ratio height, few to consume or do not consume water coolant, cost of investment and running cost low.
The inventive system comprises converter, gasification cooling flue, gravity settling chamber, flue, high temperature heat pipe heat exchanger (working temperature is at 900 ℃~500 ℃), electrostatic precipitator, aerofoil fan, flue gas and diffuse tower or gas chamber.Gravity settling chamber is connected with converter by gasification cooling flue, gravity settling chamber links to each other with the high-efficiency heat pipe interchanger by flue, high temperature heat pipe heat exchanger links to each other with electrostatic precipitator by flue, electrostatic precipitator links to each other with aerofoil fan by flue, and aerofoil fan diffuses tower by flue with flue gas or gas chamber links to each other.Gravity settling chamber, high-efficiency heat pipe interchanger and electrostatic precipitator lower end all are provided with ash discharging hole.
In method of the present invention be, coal gas of converter that converter produces or flue gas enter gravity settling chamber after the gasification cooling flue cooling is cooled to 950~1100 ℃, enter high temperature heat pipe heat exchanger at gravity settling chamber flue gas after the self gravitation sedimentation realizes thick dedusting, high temperature heat pipe heat exchanger absorbs fume afterheat and reduces flue-gas temperature to 180 ℃~150 ℃, and flue gas after the cooling or coal gas enter electrostatic precipitator and blower fan successively and delivers to and diffuse tower or gas chamber.The whole flow process converter gas that gets off had both been realized the cooling purpose, had reclaimed the waste heat in the flue gas again, had reached energy saving purposes.
High temperature heat pipe heat exchanger of the present invention carries out waste heat recovery further to 950~1100 ℃ the flue gas that comes out from converter evaporation cooling air flue and produces steam, and flue-gas temperature is dropped to about 200 ℃ from about 900 ℃.This high-temperature heat-exchanging can be selected structures such as heat pipe-type, high-efficiency heat pipe formula or shell and tube for use according to the particular case of converter gas, have the characteristics of heat exchange efficiency height, resistance little (with OG method ratio), accumulatingdust.
Because this interchanger is selected the high-efficiency heat pipe formula for use, and flue gas is separated fully with water coolant,, do not influence the normal operation of a whole set of heat-exchange equipment even wearing and tearing or failure phenomenon appear in heat pipe.Its security is good, and can realize detachable or replacing according to processing requirement.
This electrostatic precipitator of the present invention can adapt to the converter smelting process periodical change and cause exhaust gas volumn, smoke components, the periodically variable requirement of flue-gas temperature.After electrostatic precipitator, the fume emission index reaches 20mg/m 3Below.
From the requirement of domestic and international steel industry development, be badly in need of a kind of, suitable dust collecting process national conditions, brand-new and equipment.The present invention is exactly according to these needs, has designed the brand-new technological process of production of a cover, system's flue gas flow block diagram as shown in Figure 2.
Compare with traditional converter gas dust collecting process, this technology has increased gravity settling chamber and has integrated the technical process of flue gas cool-down and waste heat recovery, has abandoned water spray process for cooling, has saved a large amount of cooling-water consumptions and mud, sewage disposal expense.
Gravity settling chamber utilizes the action of gravity of dust that dust is separated with high-temperature flue gas, can capture dust granules and converter smelting splash clinker greater than 50um, plays pre-dedusting effect.Wherein the another one vital role is to use as spark catcher, and the high temperature macrobead that carries in removing smoke is flammable naked light, prevents to ignite the remaining coal gas in the flue gas.
In the present invention, adopt heat transfer efficiency height, safe heat-exchange equipment that flue gas is lowered the temperature and waste heat recovery, make flue-gas temperature obtain cooling by the physics heat that reclaims in the flue gas.The steam that the equipment of waste heat recovery simultaneously produces can be incorporated the steam net of evaporated cooling system into, uses for production, life or low pressure generating.The waste heat equipment of this device has the use temperature height, is difficult for dust stratification, and is simple in structure, adaptable characteristics.
Description of drawings
Fig. 1 is a system of the present invention main flow chart.Wherein, converter 1, gasification cooling flue 2, gravity settling chamber 3, flue 4, high temperature heat pipe heat exchanger 5, electrostatic precipitator 6, aerofoil fan 7, flue gas diffuse tower or gas chamber 8.
Fig. 2 is a system of the present invention flue gas flow block diagram.
Embodiment
Adopting converter gas dry method dust of the present invention and waste heat reclaiming process flow process to be fit to all converters produces, but different requirements according to steel mill, can realize the converter production technique of two kinds of forms, promptly both be applicable to " not firing method " converter gas, also be applicable to " perfect combustion method " converter gas.Two kinds of different converter gas, difference to some extent aspect control accuracy.Embodiment is transformed according to this operational path in existing converter evaporation cooling air flue back exactly, or at the dedusting and the waste heat recovery equipment of newly founding the factory and directly equipping this technical process.
For the timely characteristics of this programme can better be described, now in conjunction with the accompanying drawings scheme is further elaborated:
As can be seen from Figure 1, converter gas dry method dust of the present invention and waste-heat recovery device comprise that converter 1, gasification cooling flue 2, gravity settling chamber 3, flue 4, high-efficiency heat pipe interchanger 5, electrostatic precipitator 6, aerofoil fan 7, flue gas diffuse tower or gas chamber 8.Gravity settling chamber 3 is connected with converter 1 by gasification cooling flue 2, gravity settling chamber 3 links to each other with high-efficiency heat pipe interchanger 5 by flue 4, high-efficiency heat pipe interchanger 5 links to each other with electrostatic precipitator 6 by flue 4, electrostatic precipitator 6 links to each other with aerofoil fan 7 by flue 4, and aerofoil fan 7 diffuses tower by flue 4 and flue gas or gas chamber 8 links to each other.
Gravity settling chamber 3, high-efficiency heat pipe interchanger 5 and electrostatic precipitator 6 lower ends all are provided with ash discharging hole.
In the specific implementation process of present method, coal gas of converter that converter 1 produces or flue gas enter gravity settling chamber 3 after gasification cooling flue 2 coolings are cooled to 1000 ℃, enter high-efficiency heat pipe interchanger 5 at gravity settling chamber 3 flue gas after the self gravitation sedimentation realizes thick dedusting, the high-efficiency heat pipe interchanger inhale 5 receive that fume afterheats reduce about flue-gas temperatures to 180 ℃, the flue gas after the cooling or coal gas enter electrostatic precipitator 6 successively and blower fan 7 is delivered to and diffused tower or gas chamber 8.The whole flow process converter gas that gets off had both been realized the cooling purpose, had reclaimed the waste heat in the flue gas again, had reached energy saving purposes.

Claims (4)

1. converter gas dry method dust and waste-heat recovery device comprise that converter, gasification cooling flue, gravity settling chamber, flue, high temperature heat pipe heat exchanger, electrostatic precipitator, aerofoil fan, flue gas diffuse tower or gas chamber; It is characterized in that, gravity settling chamber (3) is connected with converter (1) by gasification cooling flue (2), gravity settling chamber (3) links to each other with high temperature heat pipe heat exchanger (5) by flue (4), high temperature heat pipe heat exchanger (5) links to each other with electrostatic precipitator (6) by flue (4), electrostatic precipitator (6) links to each other with aerofoil fan (7) by flue (4), and aerofoil fan (7) diffuses tower by flue (4) and flue gas or gas chamber (8) links to each other.
2. device according to claim 1 is characterized in that, gravity settling chamber (3), high temperature heat pipe heat exchanger (5) and electrostatic precipitator (6) lower end all are provided with ash discharging hole.
3. device according to claim 1 is characterized in that, described high temperature heat pipe heat exchanger working temperature is at 900 ℃~500 ℃.
4. method that adopts the described device of claim 1 to realize converter gas dry method dust and waste heat recovery, it is characterized in that, coal gas of converter that converter (1) produces or flue gas enter gravity settling chamber (3) after gasification cooling flue (2) cooling is cooled to 950~1100 ℃, enter high temperature heat pipe heat exchanger (5) at gravity settling chamber (3) flue gas after the self gravitation sedimentation realizes thick dedusting, high temperature heat pipe heat exchanger is inhaled (5) and is received fume afterheat and reduce flue-gas temperature to 180 ℃~150, and flue gas after the cooling or coal gas enter electrostatic precipitator (6) and blower fan (7) successively and delivers to and diffuse tower or gas chamber (8) and realize waste heat in cooling and the recovery flue gas.
CN2009102438293A 2009-12-23 2009-12-23 Device and method for removing dust from converter smoke by dry method and recycling waste heat CN101875992A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2009102438293A CN101875992A (en) 2009-12-23 2009-12-23 Device and method for removing dust from converter smoke by dry method and recycling waste heat

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2009102438293A CN101875992A (en) 2009-12-23 2009-12-23 Device and method for removing dust from converter smoke by dry method and recycling waste heat

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Publication Number Publication Date
CN101875992A true CN101875992A (en) 2010-11-03

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102337375A (en) * 2011-10-31 2012-02-01 中冶南方工程技术有限公司 Dry dedusting system for primary flue gas from vanadium extraction converter
CN102373312A (en) * 2011-10-31 2012-03-14 中冶南方工程技术有限公司 Primary fume dry method dedusting system of vanadium recovery converter
CN102382935A (en) * 2011-10-31 2012-03-21 中冶南方工程技术有限公司 One-time flue gas dry-process dust removing process of vanadium-extraction converter
CN103484597A (en) * 2013-09-23 2014-01-01 宁波大学 Dust-removing and heat-recovering system for furnace gas of steel converter and processing method therefor
CN104404198A (en) * 2014-10-20 2015-03-11 无锡泓成环境科技有限公司 Control method for converter one-time dry method dedusting evaporating cooling tower crude ash pneumatic conveying system under full-working condition
CN104696980A (en) * 2015-01-16 2015-06-10 广西泓达生物能源科技有限公司 Boiler flue gas treatment device for oil refinery
CN104962681A (en) * 2015-06-26 2015-10-07 汤海军 Waste-heat-recovery converter dry-method dust removal process
CN105004190A (en) * 2014-10-23 2015-10-28 铜陵翔宇商贸有限公司 Converter with precise temperature control waste-heat utilization device
CN105400965A (en) * 2015-11-18 2016-03-16 铜陵有色设计研究院 Flue gas collecting device for copper smelting of converter process
CN105543442A (en) * 2016-02-29 2016-05-04 北京志能祥赢节能环保科技股份有限公司 Method and system for treating converter flue gas passing by evaporative cooling pipeline
CN106906331A (en) * 2017-03-30 2017-06-30 河北华奥节能科技有限公司 A kind of dry-method dust-removal device and method for reclaiming converter gas waste heat
CN110066900A (en) * 2019-06-10 2019-07-30 成渝钒钛科技有限公司 A kind of vanadium titanium coal gas of converter electro dust removing method

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102373312A (en) * 2011-10-31 2012-03-14 中冶南方工程技术有限公司 Primary fume dry method dedusting system of vanadium recovery converter
CN102382935A (en) * 2011-10-31 2012-03-21 中冶南方工程技术有限公司 One-time flue gas dry-process dust removing process of vanadium-extraction converter
CN102337375B (en) * 2011-10-31 2013-02-06 中冶南方工程技术有限公司 Dry dedusting system for primary flue gas from vanadium extraction converter
CN102382935B (en) * 2011-10-31 2013-05-01 中冶南方工程技术有限公司 One-time flue gas dry-process dust removing process of vanadium-extraction converter
CN102373312B (en) * 2011-10-31 2013-06-19 中冶南方工程技术有限公司 Primary fume dry method dedusting system of vanadium recovery converter
CN102337375A (en) * 2011-10-31 2012-02-01 中冶南方工程技术有限公司 Dry dedusting system for primary flue gas from vanadium extraction converter
CN103484597A (en) * 2013-09-23 2014-01-01 宁波大学 Dust-removing and heat-recovering system for furnace gas of steel converter and processing method therefor
CN103484597B (en) * 2013-09-23 2015-07-15 宁波大学 Dust-removing and heat-recovering system for furnace gas of steel converter and processing method therefor
CN104404198A (en) * 2014-10-20 2015-03-11 无锡泓成环境科技有限公司 Control method for converter one-time dry method dedusting evaporating cooling tower crude ash pneumatic conveying system under full-working condition
CN105004190A (en) * 2014-10-23 2015-10-28 铜陵翔宇商贸有限公司 Converter with precise temperature control waste-heat utilization device
CN104696980A (en) * 2015-01-16 2015-06-10 广西泓达生物能源科技有限公司 Boiler flue gas treatment device for oil refinery
CN104962681A (en) * 2015-06-26 2015-10-07 汤海军 Waste-heat-recovery converter dry-method dust removal process
CN105400965A (en) * 2015-11-18 2016-03-16 铜陵有色设计研究院 Flue gas collecting device for copper smelting of converter process
CN105543442A (en) * 2016-02-29 2016-05-04 北京志能祥赢节能环保科技股份有限公司 Method and system for treating converter flue gas passing by evaporative cooling pipeline
CN106906331A (en) * 2017-03-30 2017-06-30 河北华奥节能科技有限公司 A kind of dry-method dust-removal device and method for reclaiming converter gas waste heat
CN110066900A (en) * 2019-06-10 2019-07-30 成渝钒钛科技有限公司 A kind of vanadium titanium coal gas of converter electro dust removing method

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Application publication date: 20101103