CN2278917Y - Preheating device with additional combustion furnace for hot-blast stove - Google Patents
Preheating device with additional combustion furnace for hot-blast stove Download PDFInfo
- Publication number
- CN2278917Y CN2278917Y CN 96225818 CN96225818U CN2278917Y CN 2278917 Y CN2278917 Y CN 2278917Y CN 96225818 CN96225818 CN 96225818 CN 96225818 U CN96225818 U CN 96225818U CN 2278917 Y CN2278917 Y CN 2278917Y
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- CN
- China
- Prior art keywords
- combustion furnace
- hot
- blast stove
- gas
- heat exchanger
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- Expired - Lifetime
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- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The utility model relates to a preheating device with additional combustion furnace for a hot-blast stove to preheat the gas of the hot-blast stove, which is composed of the hot-blast stove, a mixing chamber, a heat exchanger and a combustion furnace. One end of the gas conduit on the combustion furnace is connected with the combustion furnace, and the other end is connected with the inlet pipeline of the heat exchanger, which provides gas for the combustion furnace. The combustion furnace is a horizontal cylinder with a grid partition and two auger-type tricyclic burners in the middle. The combustion furnace not only makes use of mass of residual heat of the low-temperature exhaust gas, but also converts the gas with net calorific value to the wind temperature with high value, and meanwhile, preheats the combustion air. The preheating device has the advantages of compact structure, reasonable layout, investment saving and low operating cost.
Description
The utility model is the hot-blast stove preheating device that has the additional combustion stove, relates to a kind of device of hot-blast stove gas preheating.
Along with the continuous development of ironmaking technology, coke ratio constantly reduces, and the calorific capacity of blast furnace gas descends year by year, and under the situation of the coke-stove gas deficiency of higher calorific value, how to improve hot blast temperature, further reduce the ironmaking energy consumption, remain the important topic that ironmaking is produced.
Various measures have been taked for improving wind-warm syndrome both at home and abroad at present, utilize waste gas of hot-blast stove flue preheated air and coal gas, technologies such as raw coke oven gas preheating purified gas and hot-blast stove self-preheating have all obtained certain achievement, but the amplitude of these pre-heating technique devices raising wind-warm syndrome is little.As utilize waste gas of hot-blast stove flue waste heat preheated air and coal gas only to improve 50 ℃ to 60 ℃ of wind-warm syndrome, can not satisfy the demand of the high wind-warm syndrome of ironmaking far away.In addition, operating experience through for many years proves, though hot-blast stove utilizes the coke-stove gas of higher calorific value can improve hot blast temperature, but make the lost of life of hot-blast stove, refractory material to hot-blast stove has bad influence, judging from the current situation, want to improve wind-warm syndrome, preheated air and coal gas are the comparison effective measures.
The purpose of this utility model just provides a kind of low-heat value gas and waste gas residual heat of utilizing and comes preheating gas and air, and improves the hot-blast stove device that has the additional combustion stove of wind-warm syndrome.
The purpose of this utility model realizes in the following manner.
Have the hot-blast stove preheating device of additional combustion stove, form by hot-blast stove, mixing chamber, heat exchanger, combustion furnace etc.Combustion furnace gas piping one end connects combustion furnace, and the other end is connected on the heat exchanger entrance pipeline, for combustion furnace provides coal gas.Combustion fan connects combustion furnace, and combustion furnace communicates with mixing chamber, and mixing chamber connects the hot-blast stove flue collector, and communicates with heat exchanger.Combustion furnace is horizontal cylindrical shape, and there are grid partition wall and the spiral three ring burners of two covers in the centre, and is fixed on the basis.The grid partition wall can sieve the high-temperature flue gas that produces after the gas-fired, makes it to mix with hot-blast stove fume equably; This grid partition wall also has pressure stabilization function simultaneously, and flue gas negative pressure in burner hearth is reduced, and reaches smooth combustion, the purpose that mixes.Air is to be provided by a combustion fan, two cover spirals, three ring burner tissue burnings in combustion furnace, generation is up to high-temperature flue gas more than 1000 ℃, in mixing chamber, mix, improve the mean temperature difference of flue gas, and enter into heat exchanger jointly with exhaust gas of hot-blast stove, after heat exchange, become 150 ℃ low-temperature flue gas, after air-introduced machine is smoked, flue gas is discharged by chimney.Coal gas is removed in the coal gas through dehydrator and is entered heat exchanger behind the part mechanical water by being responsible for shutter, carry out heat exchange with mixed flue gas after, be sent to hot-blast stove gas burner through gas preheating outlet and heat exchanger exit butterfly valve.When heat-exchange system did not put into operation, the coal gas switching valve was opened, and heat exchanger entrance butterfly valve and heat exchanger exit butterfly valve are closed.Low temperature coal gas directly is responsible for by hot-blast stove coal gas and is entered into hot-blast stove by being responsible for shutter control; The stifled blind plate of going up between hot-blast stove flue collector and the mixing chamber, flue gas bypass butterfly valve is opened, and flue gas directly enters chimney by the flue gas by-pass line.
After adopting this structure, a large amount of low temperature waste gas waste heat that Combustion of Hot Air Furnace is produced is effectively utilized, and improves the algebraic mean temperature difference of heat transfer boundary condition, and utilizes a certain amount of low-calorie blast furnace gas to be converted into the wind-warm syndrome of high value.This equipment is warm-up combustion-supporting air simultaneously also, and the equipment of hot-blast stove body is adapted with it.Reduce as the coal gas side of ceramic burner and the temperature difference of air side, overcome the breakage that ceramic burner causes greatly because of the temperature difference, the service life of having improved ceramic burner greatly.
The utility model is described in further detail below in conjunction with accompanying drawing.
Fig. 1 is the flow chart that has the hot-blast stove preheating device of additional combustion stove of the present utility model;
Fig. 2 is the cutaway view of combustion furnace of the present utility model and mixing chamber.
As shown in Figure 1, 2, have the hot-blast stove preheating device of additional combustion stove, form by hot-blast stove (1), mixing chamber (3), heat exchanger (5), combustion furnace (10) etc.Combustion furnace gas piping (11) one ends connect combustion furnace (10), and the other end is connected on heat exchanger (5) inlet duct, for combustion furnace (10) provides coal gas.Combustion fan (12) connects combustion furnace (10), and combustion furnace (10) communicates with mixing chamber (3), mixing chamber (3) connection hot-blast stove flue collector (2), and and heat exchanger (5) communicate.Combustion furnace (10) is horizontal cylindrical shape, and there are grid partition wall and the spiral three ring burners (18) of two covers in the centre, and is fixed on the basis (19).Combustion fan (12) provides air for combustion furnace (10), in combustion furnace (10), burn by spiral three ring burner (18) tissues of two covers, generation is up to high-temperature flue gas more than 1000 ℃, in mixing chamber (3), mix, improve the mean temperature difference of flue gas, and enter into heat exchanger (3) jointly with hot-blast stove (10) waste gas, after heat exchange, become 150 ℃ low-temperature flue gas, after air-introduced machine (6) is smoked, flue gas is discharged by chimney (9).Coal gas is removed through dehydrator (4) and is entered heat exchanger (5) in the coal gas behind the part mechanical water by being responsible for shutter (14), carry out heat exchange with mixed flue gas after, be sent in hot-blast stove (1) burner through gas preheating outlet and heat exchanger exit butterfly valve (17).When heat-exchange system did not put into operation, coal gas switching valve (15) was opened, and heat exchanger entrance butterfly valve (16) and heat exchanger exit butterfly valve (17) are closed.Low temperature coal gas directly is responsible for (13) by hot-blast stove coal gas and is entered into hot-blast stove by being responsible for shutter (14) control; The stifled blind plate of going up between hot-blast stove flue collector (2) and the mixing chamber (3), flue gas bypass butterfly valve (8) is opened, and flue gas directly enters chimney (9) by flue gas by-pass line (7).At 1000m
3Blast furnace on use, coal gas can be preheating to 250 ℃ by 50 ℃, hot blast temperature improves 100 ℃, the hot-blast stove thermal efficiency improves 4.1%, reduces coke ratio 21 kg/ton iron, 3,000,000 yuan of year economic benefits.
The utlity model has compact equipment, office rationally, reduced investment, operating cost be low Honest and clean advantage. Because the whole system working media is low pressure, clean gas, therefore producing Corrosion is washed away, do not had to middle nothing, can realize equipment security of operation longevity.
Claims (2)
1, a kind of preheating device of hot-blast stove, form by hot-blast stove (1), mixing chamber (3), heat exchanger (5) etc., it is characterized in that preheating device is provided with combustion furnace (10), combustion furnace gas piping (11) one ends connect combustion furnace (10), the other end is connected on heat exchanger (5) inlet duct, and combustion fan (12) connects combustion furnace (10), and combustion furnace (10) communicates with mixing chamber (3), mixing chamber (3) connects hot-blast stove flue collector (2), and and heat exchanger (5) communicate.
2, the preheating device of hot-blast stove as claimed in claim 1 is characterized in that combustion furnace (10) is horizontal cylindrical shape, and there is the grid partition wall centre, and the burner of combustion furnace (10) is the spiral three ring burners (18) of two covers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96225818 CN2278917Y (en) | 1996-04-05 | 1996-04-05 | Preheating device with additional combustion furnace for hot-blast stove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96225818 CN2278917Y (en) | 1996-04-05 | 1996-04-05 | Preheating device with additional combustion furnace for hot-blast stove |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2278917Y true CN2278917Y (en) | 1998-04-15 |
Family
ID=33904387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96225818 Expired - Lifetime CN2278917Y (en) | 1996-04-05 | 1996-04-05 | Preheating device with additional combustion furnace for hot-blast stove |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2278917Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111118245A (en) * | 2020-02-05 | 2020-05-08 | 北京首钢国际工程技术有限公司 | High-temperature preheating system and method for hot blast stove |
-
1996
- 1996-04-05 CN CN 96225818 patent/CN2278917Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111118245A (en) * | 2020-02-05 | 2020-05-08 | 北京首钢国际工程技术有限公司 | High-temperature preheating system and method for hot blast stove |
| CN111118245B (en) * | 2020-02-05 | 2023-11-03 | 北京首钢国际工程技术有限公司 | High-temperature preheating system and method for hot blast stove |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |