CN101413039B - Continuous air blast type strong wind warm blast furnace - Google Patents
Continuous air blast type strong wind warm blast furnace Download PDFInfo
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- CN101413039B CN101413039B CN2008102260205A CN200810226020A CN101413039B CN 101413039 B CN101413039 B CN 101413039B CN 2008102260205 A CN2008102260205 A CN 2008102260205A CN 200810226020 A CN200810226020 A CN 200810226020A CN 101413039 B CN101413039 B CN 101413039B
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Abstract
The invention discloses a high air temperature hot air furance for continuously supplying hot air, and belongs to the technical field of auxiliary equipment of hot air furnace of an ironmaking blast furance in the iron and steel industry. The hot air furnace comprises a furnace top, a combustion chamber, checker bricks, a connecting pipe and the like. The hot air furnace is characterized in that the checker bricks in the furnace are separated into an upper group and a lower group which are arranged at intervals, one group of checker bricks are used for heat storage, the other group of checkerbricks are used for air supply, a combustor is arranged on the furnace top, and after combustion, flue gas passes through the furnace top, the connecting pipe, a ring channel and a nozzle and enters the checker bricks for combustion and heat storage in the mode of small flow; at the same time, cold air enters the other group of checker bricks and is preheated to be high temperature air and subjected to reversing control by a reversing valve; the working conditions in the two groups of checker bricks are opposite, and the cycle is repeated again and again, and the high temperature air is continuously supplied. The hot air furnace has the advantages of realizing the supply of the high temperature air at a temperature of between 1250 and 1600 DEG C by completely burning low-heat value coal gas and meeting the needs of blast furnace ironmaking, along with simple structural design, self pre-heating and continuous hot air supply.
Description
Technical field
The invention belongs to the utility appliance hotblast stove technical field of Iron And Steel Industry iron-smelting blast furnace, particularly relate to a kind of high-blast-temperature hot-blast stove that send hot blast continuously, can under full low-heat value gas situation, use.
Technical background
Hotblast stove is the visual plant of iron-making production, and its principle is to utilize heat storage technology that freezing air is become the hot blast that blast furnace needs.Structure according to hotblast stove can be divided into various ways such as external combustion type, internal combustion type and top ignition.
At present, a blast furnace often needs to be equipped with 2～4 hotblast stoves, during each hotblast stove work, burner often is in burning, stops recurrent state, and a hotblast stove often burning one send, or two burnings one are sent, when the combustion low-heat value gas, often additional one～2 hotblast stoves are as the air preheater of hotblast stove, or employing metallic recuperator preheated air or coal gas, and its cost of investment is very high.Can realize that a blast furnace joins a hotblast stove, and fire low-heat value gas entirely such as single blast furnace gas is realized high wind-warm syndrome more than 1250 ℃, be a problem that merits attention.
Send 1250 ℃ high wind-warm syndrome technology continuously for realizing a hotblast stove combustion low-heat value gas, overcome existing hotblast stove and use the defective that exists, the design people proposes a kind of novel hotblast stove structure, the high-blast-temperature hot-blast stove of collection low-heat value gas combustion, air-supply, self-preheating temperature one satisfies blast furnace ironmaking and produces needs.
Summary of the invention
The object of the present invention is to provide a kind of continuous air blast type strong wind warm blast furnace, overcome existing dissimilar hotblast stove and have defective, improve the structure of hotblast stove, not only can improve air preheating temperature by self-preheating, realize high wind-warm syndrome, simultaneously, hotblast stove has burning and blows in one, realize that a blast furnace joins a hotblast stove and reach high wind-warm syndrome, simultaneously compact construction, technological design is simple and reduce cost.
A kind of high-blast-temperature hot-blast stove that collects low-heat value gas combustion, air-supply, preheating temperature one comprises parts such as furnace roof, combustion chamber, checker brick and pipe connecting.Checker brick divide two groups of separations up and down to arrange in its stove, one group of checker brick is used for accumulation of heat, another group checker brick are used for air-supply, burner is installed in furnace roof, burning back flue gas is through furnace roof, pipe connecting, circuit and spray orifice, enter the checker brick of burning accumulation of heat in the fine flow mode, simultaneously, it is high temperature wind that cold wind enters another group checker brick preheating, after reversing valve commutation control, the working condition of two groups of checker brick is opposite, so repeatedly circulation, realize sending 1250～1600 ℃ of high temperature wind continuously, satisfy the blast furnace air temperature needs.
Continuous air blast type strong wind warm blast furnace of the present invention, furnace roof are mushroom-shaped, semisphere or back taper, and the combustion chamber internal diameter is 0.3～1.2 times of checker brick diameter.
Continuous air blast type strong wind warm blast furnace of the present invention, its combustion chamber is at furnace roof, coal gas circuit and air circuit are each one in the furnace wall, up and down or inside and outside spaced apart, in connect spout, spout is 1～3 to arrange and put, wherein gas port is 6～20, air jet is 12～40, and gas port is 5～15 ° with horizontal sextant angle upwards, and air jet is 20～45 ° with horizontal sextant angle upwards.
Continuous air blast type strong wind warm blast furnace of the present invention, between its combustion chamber and two groups of checker brick partition wall is arranged all, checker brick all have living space up and down, spatial altitude is 0.1～0.3 of a checker brick height, a flue gas circuit and 20～40 spray orifices are arranged in each checker brick upper face side furnace wall, spray orifice and vertical diameter are 20～40 ° to angle, and spray orifice is 5～30 ° with the horizontal angle of cut downwards.Side wall is offered a hot-blast outlet above the checker brick, below side wall offer a cold wind import.
Continuous air blast type strong wind warm blast furnace of the present invention, during hotblast stove work, the furnace roof combustion chamber is in combustion position all the time, and flue gas is after the checker brick heat exchange, and funnel temperature is 110～200 ℃.
Continuous air blast type strong wind warm blast furnace of the present invention, it is 1250～1600 ℃ of high temperature wind that cold wind enters the checker brick preheating, wherein 20～40% high temperature wind and cold wind are mixed into 400～1200 ℃ hot blast and coal gas and together enter combustion chambers burn, and 60～80% high temperature wind is sent to blast furnace.
Continuous air blast type strong wind warm blast furnace of the present invention, checker brick be in the flue gas heat exchange, with two cycle of states work of air heat exchange, the time of commutation control is 10～120 minutes.
Continuous air blast type strong wind warm blast furnace structure of the present invention is improved on the basis of traditional hot wind furnace, and the advantage that has is as follows:
1 technological design is simple
Only need on original hotblast stove basis, carry out the simple modifications design and just can realize.
2 collection burnings, air-supply, preheating one
This hotblast stove collection low-heat value gas combustion, air-supply, preheating temperature one have the efficient height, function is many.
The hotblast stove seat number of 3 blast furnaces configuration is minimum, and investment economizes most.
Utilize blast furnace of this hotblast stove only to need a hotblast stove just can realize 1250 ℃～1600 ℃ high wind-warm syndrome, and air-supply continuously.
4 significantly reduce long-pending cold long-pending heat, prolongs life
The combustion chamber of original hotblast stove often is in burning, stops circulatory condition, and in the cold long-pending heat affecting life-span of furnace volume, this technology has overcome the long-pending cold long-pending heat problem in combustion chamber.
Description of drawings
Fig. 1 is a continuous air blast type strong wind warm blast furnace synoptic diagram of the present invention.Wherein the combustion chamber 1, last partition wall 2, top checker brick smoke inlet 3, valve 4, valve 5, top checker brick 6, top flue outlet or cold air inlet 7, valve 8, four-way change-over valve 9, bottom checker brick smoke inlet 10, bottom checker brick 11, underflue outlet or cold air inlet 12, valve 13, gas port 14, air jet 15, air circuit 16, upper smoke gas spurt 17, upper smoke compression ring road 18, bottom flue gas spray orifice 19, bottom flue gas circuit 20, furnace roof smoke outlet 21, vault 22, coal gas circuit 23, gas entry 24, gas inlet 25, valve 26, valve 27, hot-blast outlet 28, following partition wall 29, furnace wall 30, valve 31, valve 32, bottom hot-blast outlet 33, gas blower 34, induced draft fan 35.
Embodiment
The specific embodiment of the present invention is as follows.Coal gas is through gas entry 24, coal gas circuit 23 and gas port 14 enter the combustion chamber, 20～40% high temperature wind is that 400～1200 ℃ warm air is after gas inlet 25 through the pipeline of valve 27 and freezing air mixing preheating, air circuit 16 and air jet 15 enter the combustion chamber, both are in combustion chamber mixed firing, burning back flue gas is through furnace roof smoke outlet 21, pipeline is divided into two, one links to each other with valve 4, one links to each other with valve 5, two valve states are opposite, open for one, close for one, when top checker brick 6 are in the flue gas heat exchange, connect the logical flue gas of pipeline of valve 8, connect the logical cold wind of pipeline of valve 13, valve 4 and valve 32 are opened, and valve 5 and valve 26 are closed.High-temperature flue gas enters top checker brick 6 through top checker brick smoke inlet 3, upper smoke compression ring road 18 and upper smoke gas spurt 17 and carries out heat exchange, through top flue outlet 7, with 110～200 ℃ of temperature, discharge through smoke exhaust pipe and induced draft fan 35 through valve 8 and four-way change-over valve 9.Synchronously, cold wind enters 11 heat exchanges of bottom checker brick through gas blower 34, four-way change-over valve 9, valve 13 and bottom cold air inlet 12, shunts after bottom hot-blast outlet 33, valve 32 gather through 1250～1600 ℃ high temperature wind of checker brick heating.Wherein, 20～40% high temperature wind returns with freezing air through the pipeline of valve 27 and mixes, and 60～80% high temperature wind are sent through valve 31.Four-way change-over valve 9 commutations after 30～120 minutes, the logical cold wind of pipeline that originally connects valve 8, the logical flue gas of pipeline that connects valve 13, valve 4 and valve 32 are closed simultaneously, valve 5 and valve 26 are opened, the working order of two groups of checker brick is opposite, be that high-temperature flue gas enters bottom checker brick 11 through bottom checker brick smoke inlet 10, bottom flue gas circuit 20 and bottom flue gas spray orifice 19 and carries out heat exchange, through underflue outlet 12, with 110～200 ℃ of temperature, discharge through smoke exhaust pipe and induced draft fan 35 through valve 13 and four-way change-over valve 9.Synchronously, cold wind enters 6 heat exchanges of top checker brick through gas blower 34, four-way change-over valve 9, valve 8 and top cold air inlet 7, shunts after top hot-blast outlet 28, valve 26 gather through 1250～1600 ℃ high temperature wind of checker brick 6 heating.Wherein, 20～40% high temperature wind returns with freezing air through the pipeline of valve 27 and mixes, and 60～80% high temperature wind are sent through valve 31.The hotblast stove of working order is in the heat exchange state of checker brick circulation and flue gas, air, thereby integrates burning, blow and realize that a hotblast stove fires low-heat value gas entirely and reaches 1250～1600 ℃ of high wind-warm syndrome.
Claims (6)
1. a high-blast-temperature hot-blast stove that send hot blast continuously comprises furnace roof, combustion chamber, checker brick and pipe connecting; It is characterized in that, checker brick divide two groups of separations up and down to arrange in the stove, one group of checker brick is used for accumulation of heat, another group checker brick are used for air-supply, burner is installed in furnace roof, burning back flue gas is through furnace roof, pipe connecting, circuit and spray orifice, enter the checker brick of burning accumulation of heat in the fine flow mode, simultaneously, it is high temperature wind that cold wind enters another group checker brick preheating, after reversing valve commutation control, the working condition of two groups of checker brick is opposite, circulation so repeatedly realizes sending 1250～1600 ℃ of high temperature wind continuously, satisfies the blast furnace air temperature needs;
It is 1250～1600 ℃ of high temperature wind that cold wind enters the checker brick preheating, and wherein 20～40% high temperature wind and cold wind are mixed into 400～1200 ℃ hot blast and coal gas and together enter combustion chambers burn, and 60～80% high temperature wind is sent to blast furnace.
2. continuous air blast type strong wind warm blast furnace according to claim 1 is characterized in that, furnace roof is mushroom-shaped, semisphere or back taper, and the combustion chamber internal diameter is 0.3～1.2 times of checker brick diameter.
3. continuous air blast type strong wind warm blast furnace according to claim 1, it is characterized in that, the combustion chamber is at furnace roof, coal gas circuit and respectively one of air circuit in the furnace wall, up and down or inside and outside spaced apart, in connect spout, spout is 1～3 to arrange and put, and wherein gas port is 6～20, and air jet is 12～40, gas port is 5～15 ° with horizontal sextant angle upwards, and air jet is 20～45 ° with horizontal sextant angle upwards.
4. continuous air blast type strong wind warm blast furnace according to claim 1, it is characterized in that, between combustion chamber and two groups of checker brick partition wall is arranged all, checker brick all have living space up and down, spatial altitude is 0.1～0.3 of a checker brick height, a flue gas circuit and 20～40 spray orifices are arranged in each checker brick upper face side furnace wall, spout and vertical diameter are 20～40 ° to angle, spout is 5～30 ° with the horizontal angle of cut downwards, side wall is offered a hot-blast outlet above the checker brick, below side wall offer a cold wind import.
5. continuous air blast type strong wind warm blast furnace according to claim 1 is characterized in that, during hotblast stove work, the furnace roof combustion chamber is in combustion position all the time, and flue gas is after the checker brick heat exchange, and funnel temperature is 110～200 ℃.
6. continuous air blast type strong wind warm blast furnace according to claim 1 is characterized in that, checker brick be in the flue gas heat exchange, with two cycle of states work of air heat exchange, the time of commutation control is 10～120 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102260205A CN101413039B (en) | 2008-11-04 | 2008-11-04 | Continuous air blast type strong wind warm blast furnace |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008102260205A CN101413039B (en) | 2008-11-04 | 2008-11-04 | Continuous air blast type strong wind warm blast furnace |
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| CN101413039A CN101413039A (en) | 2009-04-22 |
| CN101413039B true CN101413039B (en) | 2010-06-02 |
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| CN2008102260205A Active CN101413039B (en) | 2008-11-04 | 2008-11-04 | Continuous air blast type strong wind warm blast furnace |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101603108B (en) * | 2009-07-28 | 2010-11-03 | 首钢总公司 | Method for preventing intergranular stress corrosion of vault of hot blast heater |
| CN104451149B (en) * | 2015-01-07 | 2017-03-08 | 刘培骁 | A kind of hot blast mineral hot furnace |
| CN108774657B (en) * | 2018-07-02 | 2019-11-29 | 郑州釜鼎热能技术有限公司 | A kind of multiinjector continuous high temperature hot-blast stove that mixed burning and board-like compact heat exchange are combined by force |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2548704A1 (en) * | 1975-10-30 | 1977-05-05 | Linde Ag | Hot wind stoves for blast furnaces - where one combustion chamber heats two stoves alternatively |
| CN1313405A (en) * | 2000-03-13 | 2001-09-19 | 包头市先曼科技开发有限责任公司 | Efficient airheater group for blast furnace and method for collecting its hot wind for blast furnace |
-
2008
- 2008-11-04 CN CN2008102260205A patent/CN101413039B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2548704A1 (en) * | 1975-10-30 | 1977-05-05 | Linde Ag | Hot wind stoves for blast furnaces - where one combustion chamber heats two stoves alternatively |
| CN1313405A (en) * | 2000-03-13 | 2001-09-19 | 包头市先曼科技开发有限责任公司 | Efficient airheater group for blast furnace and method for collecting its hot wind for blast furnace |
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Address after: 100041 Shijingshan Road, Shijingshan District, Shijingshan District, Beijing Patentee after: Shougang Group Co. Ltd. Address before: 100041 Shijingshan Road, Shijingshan District, Shijingshan District, Beijing Patentee before: Capital Iron & Steel General Company |
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