CN101928796A - High wind temperature energy saving and emission reduction combined preheating method for blast furnace - Google Patents

High wind temperature energy saving and emission reduction combined preheating method for blast furnace Download PDF

Info

Publication number
CN101928796A
CN101928796A CN 201010243599 CN201010243599A CN101928796A CN 101928796 A CN101928796 A CN 101928796A CN 201010243599 CN201010243599 CN 201010243599 CN 201010243599 A CN201010243599 A CN 201010243599A CN 101928796 A CN101928796 A CN 101928796A
Authority
CN
China
Prior art keywords
air
blast furnace
gas
hot
energy saving
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN 201010243599
Other languages
Chinese (zh)
Inventor
梁怀奇
许永贵
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JIANGSU ZHONGTIAN ENERGY EQUIPMENT CO Ltd
Original Assignee
JIANGSU ZHONGTIAN ENERGY EQUIPMENT CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by JIANGSU ZHONGTIAN ENERGY EQUIPMENT CO Ltd filed Critical JIANGSU ZHONGTIAN ENERGY EQUIPMENT CO Ltd
Priority to CN 201010243599 priority Critical patent/CN101928796A/en
Publication of CN101928796A publication Critical patent/CN101928796A/en
Pending legal-status Critical Current

Links

Abstract

The invention relates to a high wind temperature energy saving and emission reduction combined preheating method for a blast furnace, and belongs to the technical field of energy saving and emission reduction and steel smelting equipment. The method comprises the steps of: mixing hot smoke from a hot blast furnace and a front combustion furnace; then exchanging the heat of the mixed smoke with that of cold air and cold gas respectively; supplying the hot air and the hot gas formed after the heat exchange to the hot blast furnace; meanwhile, supplying the hot gas and air which is from a blower of a front furnace to a burner. By the preheating method, a secondary air turbolator heat exchanger is not needed, and control valves and connection pipelines which are used in the method are greatly reduced, so that installation is facilitated, cost is reduced, the probability of reducing leakage is facilitated and maintenance is convenient.

Description

A kind of high wind temperature energy saving and emission reduction combined preheating method for blast furnace
Technical field
The invention belongs to energy-saving and emission-reduction and steel smelting equipment technical field, the combination preheating technology method that particularly a kind of iron-smelting blast furnace hotblast stove uses.
Background technology
In the existing Iron and Steel Production equipment, a kind of " the high wind-warm syndrome combination of blast furnace heat-exchange system " (patent No.: ZL200420024014.9), mainly be made of hotblast stove, preposition roasting kiln, the sub-interchanger of air disturbance, coal gas hot tube heat exchanger, air hot tube heat exchanger, smoke evacuation induced draft fan, precell gas blower, cooled coal gas house steward, freezing air house steward and due pipeline and valve etc. is arranged.When work, adopt a plurality of hotblast stoves to provide hot blast to blast furnace in turn.Under equal prerequisite, the hotblast stove dome temperature is high more, and the hot blast temperature that hotblast stove is sent is just high more, and by the bottom house regulating measure, is easy to keep higher relatively more stable wind pushing temperature.Its technical scheme is: cooled coal gas and combustion-supporting freezing air that hot blast stove burning is used carry out a preheating by corresponding hot tube heat exchanger before entering hotblast stove, and the air after the preheating carries out the secondary preheating through the turbolator interchanger again, the hotblast stove dome temperature correspondingly is improved, thereby the wind pushing temperature that enters blast furnace is improved.This technical scheme has obtained unusual effect, can make the high wind-warm syndrome of blast furnace acquisition more than 1250 ℃, and obtain remarkable economic efficiency.But this technical scheme still has following deficiency:
(1) in the system owing to be provided with the turbolator interchanger of air secondary preheating, make gross weight of equipment still dislike bigger than normal;
(2) air side, fume side resistance to flow are bigger;
(3) valve quantity is on the high side in the system;
(4) the turbolator interchanger is vertical layout, and heat transfer tube is arranged horizontally, and the flue-gas temperature control in mixing smoke pipe is improper and when surpassing 650 ℃, the heat transfer tube distortion is burnt out, and gas leak phenomenon takes place.
Summary of the invention
The combination pre-heating mean that the purpose of this invention is to provide a kind of novel high wind-warm syndrome makes blast furnace under the high wind-warm syndrome prerequisite that obtains more than 1250 ℃, energy-saving and emission-reduction, reduces equipment volume, and metal consumption is few, make and working cost low.
Technical scheme of the present invention is: carry out a heat exchange with freezing air and cooled coal gas respectively after the hot flue gas that will come from hotblast stove and preposition roasting kiln mixes, the warm air, the heating gas that form after the heat exchange are supplied with hotblast stove, simultaneously, also with described heating gas with from the air supplied burner of precell gas blower.
Major function of the present invention is as follows:
1, the technical characterstic that has kept " the combination heat-exchange system of the high wind-warm syndrome of blast furnace " (patent No. is ZL200420024014.9), be that coal gas and air after the preheating is sent to Combustion of Hot Air Furnace, can make the blast temperature of blast furnace realization more than 1250 ℃, synthesis energy saving 6~7Kgce/t iron.
2, the operation of blast furnace operating mode is restricted by multiple factor, when blast furnace be can not accept high wind-warm syndrome, the present invention is convenient to high wind-warm syndrome heat-exchange system is switched, promptly reduce precell gas consumption amount, reduce the mixed flue gas temperature, reduce combustion air and gas preheating temperature or stop the precell operation, directly utilize hot-blast stove fume that air and coal gas are carried out preheating, be sent to hotblast stove warm air and heating gas house steward then, still can make blast furnace obtain 1100 ℃~1200 ℃ blast temperature.
The technology of the present invention had both kept all functions of prior art, again the preheating method of prior art was innovated, was simplified, and made that system is more advanced, safety, and was specific as follows:
1, the patent No. is that the approach of " the combination heat-exchange system of the high wind-warm syndrome of blast furnace " realization blast furnace wind pushing temperature more than 1250 ℃ of ZL200420024014.9 is by heat tube preheater combustion air, coal gas to be carried out one-level preheating (air, coal gas all are preheated to about 200 ℃), by the turbolator interchanger combustion air is carried out preheating again (be the secondary preheating, air is preheated to more than 400 ℃ by 200 ℃).The present invention has simplified technical process, adopt hot combined heat pipe exchanger of air and the hot combined heat pipe exchanger of coal gas respectively, disposable with combustion air, gas preheating to 250~350 ℃, removed secondary air turbolator interchanger, same realization blast furnace wind pushing temperature more than 1250 ℃, system operation and control are more simple, convenient.
2,, make system's operation safer reliable because interchanger all adopts hot combined heat pipe exchanger of air and the hot combined heat pipe exchanger of coal gas, and the total system cold fluid and hot fluid can not leak mutually.
3, the patent No. is that " the combination heat-exchange system of the high wind-warm syndrome of blast furnace " of ZL200420024014.9 needs combustion air is preheating to more than 400 ℃, air line insulation, valve heatproof and secondary air turbolator interchanger are required with material high, the investment cost height.The present invention is because air, gas preheating temperature about 250~350 ℃, require greatly to reduce with material and to the valve heatproof, and investment cost is low.
4, owing to saved secondary air turbolator interchanger, the present invention not only makes air side, fume side resistance to flow less, can save the operation energy consumption of precell gas blower greatly.
5, owing to saved secondary air turbolator interchanger, system architecture of the present invention is more compact, and floor space, metal consumption, system's resistance are decreased, and investment cost and working cost all have bigger minimizing, and system is more economical, more energy-conservation.
6, owing to saved secondary air turbolator interchanger, by-pass valve control of the present invention and connecting tube reduce in a large number, not only are beneficial to installation, reduce cost, and also are beneficial to reduce to leak probability, maintain easily.
In a word, the present invention has overcome the some shortcomings that prior art exists in actual motion, make system operation more economically, more energy-conservation, can be widely used in the smelting iron and steel industry.
Description of drawings
Fig. 1 is a fundamental diagram of the present invention.
Embodiment
As shown in Figure 1, the air that comes from freezing air house steward 14 is connected the air inlet of air combined heat pipe exchanger 20 through air intlet pipe 12, air cutoff valve 18, warm air house steward 4 is connected through air pipe 22, valve 7 in the air air outlet of air combined heat pipe exchanger 20, is sent to the air inlet end of hotblast stove 1.Connect by trip valve 15 between freezing air house steward 14 and the warm air house steward 4.
Cooled coal gas house steward 13 is connected the gas inlet of coal gas combined heat pipe exchanger 16 through gas stop valve 11, gas pipe 17, and heating gas house stewards 6 are connected through hot gas pipe 15, valve 8 in the coal gas air outlet of coal gas combined heat pipe exchanger 16.Connect by trip valve 10 between cooled coal gas house steward 13 and the heating gas house steward 6.
Heating gas house steward 6 is divided into two-way: the one tunnel directly connects the gas inlet of hotblast stove 1, and the gas inlet end of burner 38 is connected on another road through branch gas tube 2, variable valve 40, gas stop valve 39.The air that precell gas blower 34 is discharged is connected the air inlet end of burner 38 through blast main 35, variable valve 36.The exit end of burner 38 is connected the entrance end of preposition roasting kiln 3, and the upper top connection mixing smoke pipe 5 at preposition roasting kiln 3 is provided with trip valve 30 on mixing smoke pipe 5.
The smoke outlet of hotblast stove 1 connects breadboard 37, and the pipeline of breadboard 37 is divided into two branch roads: the one tunnel through precell convert smoke pipe road 31, valve 33,32 connect preposition roasting kiln 3 on; Also have one the tunnel through smoke regulating valve 29, hot-blast stove fume fairlead 28 and after the flue gas that mixes smoke pipe 5 converges, connect the gas approach end of coal gas combined heat pipe exchanger 16, air combined heat pipe exchanger 20 more respectively respectively through flue gas trip valve 21 and 27, after carrying out heat exchange respectively, the smoke outlet of coal gas combined heat pipe exchanger 16, air combined heat pipe exchanger 20 is connected induced draft fan 25 through smoke exhaust pipe 23 respectively, connects chimney 19 through valve 24 again.
Breadboard 37 connects chimney 19 by main flue gate valve 26.

Claims (1)

1. high wind temperature energy saving and emission reduction combined preheating method for blast furnace, after mixing, the hot flue gas that it is characterized in that coming from hotblast stove and preposition roasting kiln carries out a heat exchange with freezing air and cooled coal gas respectively, the warm air, the heating gas that form after the heat exchange are supplied with hotblast stove, simultaneously, also with described heating gas with from the air supplied burner of precell gas blower.
CN 201010243599 2010-07-29 2010-07-29 High wind temperature energy saving and emission reduction combined preheating method for blast furnace Pending CN101928796A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201010243599 CN101928796A (en) 2010-07-29 2010-07-29 High wind temperature energy saving and emission reduction combined preheating method for blast furnace

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201010243599 CN101928796A (en) 2010-07-29 2010-07-29 High wind temperature energy saving and emission reduction combined preheating method for blast furnace

Publications (1)

Publication Number Publication Date
CN101928796A true CN101928796A (en) 2010-12-29

Family

ID=43368225

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201010243599 Pending CN101928796A (en) 2010-07-29 2010-07-29 High wind temperature energy saving and emission reduction combined preheating method for blast furnace

Country Status (1)

Country Link
CN (1) CN101928796A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103131814A (en) * 2011-12-01 2013-06-05 上海雷林工程技术有限公司 Coal gas and air synchronous double-preheating system with additionally arranged combustion furnace
CN103131812A (en) * 2011-12-01 2013-06-05 上海雷林工程技术有限公司 Plate-type air and coal gas double-preheating system for hot blast stove
CN103131813A (en) * 2011-11-29 2013-06-05 上海雷林工程技术有限公司 Coal gas and air asynchronous and double-preheating system with additionally arranged combustion furnace
CN106399612A (en) * 2016-11-07 2017-02-15 上海铁戈炉业有限公司 Preheating energy saving system and preheating method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3493344A (en) * 1966-12-21 1970-02-03 John C St Clair Revolving pebble bed heat exchanger
JP2002266012A (en) * 2001-03-08 2002-09-18 Nippon Steel Corp Waste heat recovering equipment for hot air stove for blast furnace
US20040222574A1 (en) * 2004-04-05 2004-11-11 Michael Friedrich Preheating cold blast air of a blast furnace for tempering the hot blast temperature
CN200996026Y (en) * 2006-12-19 2007-12-26 江苏中天能源设备有限公司 Assembled heat-exchanging system for realizing hot blast furnace

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3493344A (en) * 1966-12-21 1970-02-03 John C St Clair Revolving pebble bed heat exchanger
JP2002266012A (en) * 2001-03-08 2002-09-18 Nippon Steel Corp Waste heat recovering equipment for hot air stove for blast furnace
US20040222574A1 (en) * 2004-04-05 2004-11-11 Michael Friedrich Preheating cold blast air of a blast furnace for tempering the hot blast temperature
CN200996026Y (en) * 2006-12-19 2007-12-26 江苏中天能源设备有限公司 Assembled heat-exchanging system for realizing hot blast furnace

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103131813A (en) * 2011-11-29 2013-06-05 上海雷林工程技术有限公司 Coal gas and air asynchronous and double-preheating system with additionally arranged combustion furnace
CN103131814A (en) * 2011-12-01 2013-06-05 上海雷林工程技术有限公司 Coal gas and air synchronous double-preheating system with additionally arranged combustion furnace
CN103131812A (en) * 2011-12-01 2013-06-05 上海雷林工程技术有限公司 Plate-type air and coal gas double-preheating system for hot blast stove
CN106399612A (en) * 2016-11-07 2017-02-15 上海铁戈炉业有限公司 Preheating energy saving system and preheating method
CN106399612B (en) * 2016-11-07 2019-01-25 上海铁戈炉业有限公司 A kind of preheating energy-saving systems and pre-heating mean

Similar Documents

Publication Publication Date Title
CN101173324A (en) Novel technique for comprehensive utilization of continuous strip annealing furnace flue gas exhaust heat and device thereof
CN202066385U (en) Novel waste heat recovery and use device
CN103673592B (en) The method and system of the combustion gas of a kind of preheating, sintering, igniting stove in parallel and combustion air
CN101928797A (en) High-blast-temperature energy-saving and emission-reducing combined type preheating system for blast furnace
CN202532702U (en) Top combustion hot-blast stove capable of achieving double preheating through mix of high-temperature smoke and low-temperature smoke
CN103088178B (en) Blast furnace hot-blast stove flue gas self-circulation combustion method and system
CN200996026Y (en) Assembled heat-exchanging system for realizing hot blast furnace
CN101928796A (en) High wind temperature energy saving and emission reduction combined preheating method for blast furnace
CN2863813Y (en) High-air temperature multi-functional grouping residual heat system for blast furnace
CN2669131Y (en) Blast furnace high-air-temperature combined heat-exchange system
CN203174129U (en) Flue gas self-circulation combustion system of blast furnace hot blast stove
CN201785422U (en) High-air-temperature energy-saving emission-reduction combined preheating system of blast furnace
CN201062796Y (en) Apparatus for secondary pre-heating combustion air for oil gas multifuel combustion heating furnace
CN205403139U (en) Low nitrogen buggy boiler
CN201785425U (en) Air preheating combined heat pipe heat exchanger of blast furnace
CN202246727U (en) High-blast-temperature combinative heat exchange system of blast furnace
CN201525853U (en) High-wind-temperature long-life type two-stage double-preheating device
CN101906495A (en) Gas preheating combined heat pipe exchanger
CN201785423U (en) Gas preheating combined heat-pipe heat exchanger
CN203533872U (en) Biomass double-flue counter-burning water heating heat-supply device
CN203403121U (en) Device for achieving high blast temperature by virtue of low calorific value coal gas and high temperature combustion-supporting air
CN202868978U (en) Environment-friendly hot-blast stove system
CN2900546Y (en) Blast furnace combined air-gas doulbe preheating waste heat recovery device
CN202643723U (en) Grill-free double-preheating top combustion hot-blast stove
CN202470782U (en) Secondary smoke residual heat utilization system for hot blast stove

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C02 Deemed withdrawal of patent application after publication (patent law 2001)
WD01 Invention patent application deemed withdrawn after publication

Open date: 20101229