CN107815516A - A kind of external-heat coal base upright furnace for being used to produce DRI - Google Patents
A kind of external-heat coal base upright furnace for being used to produce DRI Download PDFInfo
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- CN107815516A CN107815516A CN201711348674.0A CN201711348674A CN107815516A CN 107815516 A CN107815516 A CN 107815516A CN 201711348674 A CN201711348674 A CN 201711348674A CN 107815516 A CN107815516 A CN 107815516A
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- Prior art keywords
- regenerator
- cooling
- cooling chamber
- chamber
- combustion chamber
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Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/02—Making spongy iron or liquid steel, by direct processes in shaft furnaces
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/10—Reduction of greenhouse gas [GHG] emissions
- Y02P10/143—Reduction of greenhouse gas [GHG] emissions of methane [CH4]
Abstract
The present invention relates to a kind of external-heat coal base upright furnace for being used to produce DRI, the cooling chamber wall of cooling chamber both sides is inwardly respectively equipped with cooled gas path along high, each cooled gas path is provided with the outlet of multiple cooling gas or cooling gas inlet, and cooling gas outlet, cooling gas inlet connect with cooling chamber inner space；The top that air flue connection combustion chamber is converged at top is set at the top of the top regenerator, bottom sets top regenerator bottom flue；Portion's regenerator bottom flue is set at the top of the bottom regenerator, bottom sets the bottom that air flue connection combustion chamber is converged in bottom.The present invention by the oxidation reaction of the fuel combustion during direct reduction iron making, the gasification reaction of raw material, raw material reduction reaction, generate sponge iron cooling procedure and the process of recovery high-temperature flue gas waste heat concentrate in upright furnace and carry out, have the characteristics that furnace binding is reasonable, converter life is long, hot working efficiency is high, auxiliary device invest it is low, be easily achieved engineering.
Description
Technical field
The present invention relates to upright furnace technical field, more particularly to a kind of external-heat coal base for producing DRI are straight
Vertical stove.
Background technology
Direct reduction iron making technique (DRI) refers under the fusion temperature less than iron ore, by reducing in the solid state,
Iron ore refines the technical process into metallic iron, and its product is called sponge iron.Sponge iron is the required raw material for smelting excellent special steel, excellent
The excellent special steel product of matter is widely used in power station, metallurgy, petrochemical industry, aviation and field of ship equipment, and demand increase is rapid.
However, the yield of China's DRI not as good as million tons, less than the 1% of world's DRI yield, is put down far below the world
It is horizontal.The problem of low-end product overproduction, high-end product are underproduced as China's steel industry urgent need to resolve.
Direct reduction iron making is divided into two kinds of gas base directly reducing and coal-based direct reduction by technique, is divided into back by main equipment
Rotary kiln, rotary hearth furnace, retort, tube furnace and fluid bed etc..At present, more than 90% DRI is all to use gas base in the world
What reducing process was produced, but China's natural gas resource-constrained, price are higher, gas-based reduction is not suitable for the few gas of the more coals in China
National conditions, and traditional coal-based rotary kiln technique, rotary hearth furnace process, all to there is high energy consumption, production process in tunnel cave technique not easily-controllable
System, the problem such as product quality grade is low.
Studies in China person have also been made certain research to external-heat coal-based direct reduction, such as Publication No. CN101832706A
Patent《External combustion tube type direct reduction shaft furnace》, Publication No. CN201166513 patent《Coal-based direct reduction iron external-heat erects
Stove》, the U's of Publication No. CN 204529897《A kind of external-heat coal base shaft furnace for producing DRI》Deng.It is above-mentioned disclosed
Technology, its furnace binding is excessively simple, the only oxidation reaction including fuel combustion, the gasification reaction and original of raw material in shaft furnace
The reduction reaction of material, converter life is short, hot working efficiency is low, is difficult to be engineered, and uses the sponge iron of high temperature outside stove
The type of cooling to be cooled with water cooling equipment, height, equipment investment are big to be required to discharge apparatus and water cooling equipment high temperature resistant.
The content of the invention
The invention provides a kind of external-heat coal base upright furnace for being used to produce DRI, by direct reduction iron making mistake
The oxidation reaction of fuel combustion in journey, the gasification reaction of raw material, raw material reduction reaction, generate the cooling procedure of sponge iron
And the process of recovery high-temperature flue gas waste heat is concentrated in upright furnace and carried out, with furnace binding is reasonable, converter life is long, Re Gongxiao
Rate is high, auxiliary device investment is low, is easily achieved the features such as engineering.
In order to achieve the above object, the present invention is realized using following technical scheme：
A kind of external-heat coal base upright furnace for being used to produce DRI, including reduction room, combustion chamber, furnace roof, accumulation of heat
Room and cooling chamber；Combustion chamber and reduction room, cooling chamber occupy body of heater side, and regenerator occupies body of heater opposite side；Combustion chamber and also
Former room distributes alternately, and cooling chamber connects positioned at the lower section of reduction room, the top of cooling chamber with reduction room；Furnace roof is located at combustion chamber
Top；Regenerator includes top regenerator and bottom regenerator, top regenerator, one end and the combustion chamber phase of bottom regenerator
Logical, the other end is connected with waste gas valve, and checker brick are equipped with top regenerator and bottom regenerator；The cooling chamber both sides
Cooling chamber be respectively equipped with cooled gas path within the walls, multiple cooled gas paths are along cooling chamber height to being uniformly arranged, Mei Geleng
But along cooling chamber length to being uniformly provided with, multiple cooling gas export gas passage or cooling gas inlet, cooling gas export, are cold
But gas access connects with cooling chamber inner space；Top is set at the top of the top regenerator and converges air flue connection combustion chamber
Top, bottom set top regenerator bottom flue；Portion's regenerator bottom flue is set at the top of the bottom regenerator, bottom sets bottom
Converge the bottom of air flue connection combustion chamber.
The cooling gas inlet or the opening direction of cooling gas outlet are respectively facing obliquely downward on the inside of cooling chamber.
The cooling gas inlet and cooling gas outlet are oppositely arranged；The cooling of side cooling chamber within the walls i.e. in cooling chamber
Cooling gas inlet is all provided with gas passage, cooling gas outlet is all provided with the cooled gas path of opposite side cooling chamber within the walls.
Cooling gas inlet, both sides cooling are all provided with the cooling chamber in the cooled gas path of both sides cooling chamber wall bottom
Cooling gas outlet is all provided with the cooled gas path on room wall top.
The cooled gas path, cooling gas inlet and cooling gas outlet are formed by laying fireproof bricks respectively, or by
The stainless steel tube composition being located in refractory brick.
The reduction room reduces room for single reduction room, double reduction room or three rows, and reduction room is suitable for reading narrow in the width direction
Lower mouth is wide, and reduces mouth width under room and be more than reduction room width 10mm~200mm suitable for reading；Cooling chamber width suitable for reading and reduction room
The width of lower mouth is identical.
The top regenerator and bottom regenerator form a unit regenerator, each unit regenerator and combustion chamber one
One is correspondingly arranged.
Compared with prior art, the beneficial effects of the invention are as follows：
1) upright furnace body is rational in infrastructure, and heat transfer condition is good, converter life length；
2) regenerator is capable of the air of the waste heat preheated burning of recovered flue gas, and upright furnace hot working efficiency is high；
3) it is easy to operate, air flow rate is adjustable, easily controllable ignition temperature and speed, reduce high temperature dot, so as to reduce NOx
Generation, be more conducive to environmental protection；
4) cooling chamber can realize that product sponge iron quickly cools down in stove, reduce the superhigh temperature resistant to cooling device outside stove
It is required that, auxiliary device investment can be reduced, while improve production efficiency.
Brief description of the drawings
Fig. 1 is the body of heater longitudinal sectional view of upright furnace of the present invention.
Fig. 2 is the A-A views in Fig. 1.
Fig. 3 is cooling gas inlet of the present invention and cooling gas outlet distribution schematic diagram one.
Fig. 4 is cooling gas inlet of the present invention and cooling gas outlet distribution schematic diagram two.
In figure：1. the combustion chamber 4. of 2. furnace roof of top charging mouth 3. reduction room 5. cooling chamber, 6. cooled gas path 7. combustion chamber
The regenerator of checker brick 11. and the division wall of combustion chamber in the top regenerator of 8. cooling chamber wall of wall, 9. top regenerator sealing wall 10.
12. the grid in the bottom regenerator of 13. bottom 14. bottom regenerator sealing wall of regenerator bottom flue of top regenerator bottom flue 15.
The cooling gas inlet 21. of 19. combustion chamber protection wall of partition wall 17. flue partition, 18. flue 20. cools down in the middle part of the combustion chamber of brick 16.
The cooling chamber of gas vent 22. is suitable for reading
Embodiment
The embodiment of the present invention is described further below in conjunction with the accompanying drawings：
As shown in Figure 1 and Figure 2, a kind of external-heat coal base upright furnace for being used to produce DRI of the present invention, including
Reduce room 4, combustion chamber 3, furnace roof 2, regenerator and cooling chamber 5；Combustion chamber 3 and reduction room 4, cooling chamber 5 occupy body of heater side, store
Hot cell occupies body of heater opposite side；Combustion chamber 3 and reduction room 4 distribute alternately, and cooling chamber 5 is positioned at the lower section of reduction room 4, cooling chamber 5
Top with reduction room 4 connect；Furnace roof 2 is located at the top of combustion chamber 3；Regenerator includes top regenerator and bottom regenerator,
Top regenerator, one end of bottom regenerator communicate with combustion chamber 3, and the other end is connected with waste gas valve, top regenerator and
Checker brick 10/15 are equipped with the regenerator of bottom；Cooling gas is respectively equipped with the cooling chamber wall 8 of the both sides of cooling chamber 5 to lead to
Road 6, multiple cooled gas paths 6 along the height of cooling chamber 5 to being uniformly arranged, along cooling chamber 5 grow to uniform by each cooled gas path 6
Provided with multiple cooling gas outlet 21 or cooling gas inlet 20, cooling gas outlet 21, cooling gas inlet 20 and cooling chamber 5
Inner space connects；The top that air flue connection combustion chamber 3 is converged at top is set at the top of the top regenerator, bottom sets top storage
Hot cell bottom flue 12；Portion's regenerator bottom flue 13 is set at the top of the bottom regenerator, bottom sets bottom and converges air flue connection
The bottom of combustion chamber 3.
The cooling gas inlet 20 or the opening direction of cooling gas outlet 21 are respectively facing in cooling chamber 5 under skew back
Side.
As shown in figure 3, the cooling gas inlet 20 and cooling gas outlet 21 are oppositely arranged；Side i.e. in cooling chamber 5
It is all provided with cooling gas inlet 20 in cooled gas path 6 in cooling chamber wall 8, the cooling gas in opposite side cooling chamber wall 8 is led to
Cooling gas outlet 21 is all provided with road 6.
As shown in figure 4, it is all provided with cooling gas in the cooled gas path 6 of the bottom of both sides cooling chamber wall 8 in the cooling chamber 5
Entrance 20, cooling gas outlet 21 is all provided with the cooled gas path 6 on the top of both sides cooling chamber wall 8.
The cooled gas path 6, cooling gas inlet 20 and cooling gas outlet 21 are formed by laying fireproof bricks respectively,
Or the stainless steel tube by being located in refractory brick forms.
The reduction room 4 reduces room for single reduction room, double reduction room or three rows, and reduction room 4 is suitable for reading in the width direction
Narrow lower mouth is wide, and reduces mouth width under room and be more than reduction room width 10mm~200mm suitable for reading；The width of cooling chamber suitable for reading 22 is with going back
The width of mouth is identical under former room.
The top regenerator and bottom regenerator form a unit regenerator, each unit regenerator and combustion chamber 3
Correspond and set.
The combustion chamber 3 of upright furnace is by partition wall 16, reduction room wall, burning in the middle part of flue 18, flue partition 17, combustion chamber
Room wall 7 and combustion chamber protection wall 19 form；Reduce room 4 by both sides reduce room wall, regenerator wall, protection wall, charging door furnace retaining ironware and
Discharge gate furnace retaining ironware surrounds composition, and cooling chamber 5 is by both sides cooling chamber wall, regenerator wall, protection wall and discharge gate furnace retaining iron
Part surrounds composition.Set regenerator partition wall between top regenerator and bottom regenerator, top regenerator, bottom regenerator with
The adjacent side in combustion chamber sets the division wall 11 of regenerator and combustion chamber, and opposite side sets top regenerator sealing wall 9 respectively and bottom stores
Hot cell protection wall 14.Furnace roof sets top charging mouth 1.
In the present invention, the cooling gas conveyed by corresponding cooled gas path 6 enters cooling chamber by cooling gas inlet 20
5, cooling gas in the horizontal direction or flows up in cooling chamber 5, with the high-temperature sponge iron direct heat transfer to flow downward, can incite somebody to action
800 DEG C~1000 DEG C of high-temperature sponge iron is cooled in the range of 100 DEG C~350 DEG C, and the cooling gas after heat exchange is by cooling gas
Outlet 21 cooling chamber 5 is left by corresponding cooled gas path 6.Cooling gas is the generation gas of direct reduction iron making reaction, main
To be the gaseous mixture of carbon monoxide and carbon dioxide, can also use the inert gases such as nitrogen.
Cooled gas path 6 provided with cooling gas inlet 20 is respectively with entering furnace gas pipeline (the blower fan malleation port of export) even
Connect, the cooled gas path 6 provided with cooling gas outlet 21 is connected with aspirating air pipe (blower negative pressure arrival end) respectively.
Top regenerator and bottom regenerator form a unit regenerator, and each unit regenerator and combustion chamber 3 are one by one
It is correspondingly arranged, the temperature controllability of combustion chamber flue 18 is strong.
In first exchange cycle, air enters top regenerator bottom flue 12 by waste gas valve, by top
After checker brick 10 in regenerator preheat, converge air flue through top and participate in burning, the heat after burning into combustion chamber flue 18
Waste gas converges air flue by the bottom of combustion chamber 3 into bottom, after carrying out heat exchange with the checker brick 15 in the regenerator of bottom, passes through
The bottom flue 13 of bottom regenerator enters chimney through waste gas valve；
In second exchange cycle, air enters the bottom flue 13 of bottom regenerator by waste gas valve, under
After checker brick 15 in portion's regenerator preheat, converge air flue through bottom and participate in burning into combustion chamber flue 18, after burning
Hot waste gas enters top by the top of combustion chamber 3 and converges air flue, after carrying out heat exchange with the checker brick 10 in the regenerator of top, leads to
The bottom flue 12 for crossing top regenerator enters chimney through waste gas valve；
In different exchange cycles, the gas-flow resistance by top regenerator and bottom regenerator is same or like, founds fire
Pressure distribution is more stable in road 18, and temperature fluctuation controllability is strong in production process, advantageously reduces nitrogen oxide emission.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, technique according to the invention scheme and its
Inventive concept is subject to equivalent substitution or change, should all be included within the scope of the present invention.
Claims (7)
1. a kind of external-heat coal base upright furnace for being used to produce DRI, including reduction room, combustion chamber, furnace roof, regenerator
And cooling chamber；Combustion chamber and reduction room, cooling chamber occupy body of heater side, and regenerator occupies body of heater opposite side；Combustion chamber and reduction
Room distributes alternately, and cooling chamber connects positioned at the lower section of reduction room, the top of cooling chamber with reduction room；Furnace roof is located at the upper of combustion chamber
Portion；Regenerator includes top regenerator and bottom regenerator, and top regenerator, one end of bottom regenerator communicate with combustion chamber,
The other end is connected with waste gas valve, and checker brick are equipped with top regenerator and bottom regenerator；It is characterized in that, described cold
But the cooling chamber of room both sides is respectively equipped with cooled gas path within the walls, and multiple cooled gas paths are along cooling chamber height to uniform and water
Flat to set, each cooled gas path is cold along cooling chamber length to being uniformly provided with multiple cooling gas outlets or cooling gas inlet
But gas vent, cooling gas inlet connect with cooling chamber inner space；Top is set at the top of the top regenerator and converges gas
Road connects the top of combustion chamber, and bottom sets top regenerator bottom flue；It is small that portion's regenerator is set at the top of the bottom regenerator
Flue, bottom set the bottom that air flue connection combustion chamber is converged in bottom.
A kind of 2. external-heat coal base upright furnace for being used to produce DRI according to claim 1, it is characterised in that
The cooling gas inlet or the opening direction of cooling gas outlet are respectively facing obliquely downward on the inside of cooling chamber.
A kind of 3. external-heat coal base upright furnace for being used to produce DRI according to claim 1, it is characterised in that
The cooling gas inlet and cooling gas outlet are oppositely arranged；The cooled gas path of side cooling chamber within the walls i.e. in cooling chamber
On be all provided with cooling gas inlet, be all provided with the cooled gas path of opposite side cooling chamber within the walls cooling gas outlet.
A kind of 4. external-heat coal base upright furnace for being used to produce DRI according to claim 1, it is characterised in that
Cooling gas inlet, both sides cooling chamber wall top are all provided with the cooling chamber in the cooled gas path of both sides cooling chamber wall bottom
Cooled gas path on be all provided with cooling gas outlet.
A kind of 5. external-heat coal base upright furnace for being used to produce DRI according to claim 1, it is characterised in that
The cooled gas path, cooling gas inlet and cooling gas outlet are formed by laying fireproof bricks respectively, or resistance to by being located in
Stainless steel tube composition in firebrick.
A kind of 6. external-heat coal base upright furnace for being used to produce DRI according to claim 1, it is characterised in that
The reduction room reduces room for single reduction room, double reduction room or three rows, and narrow lower mouth suitable for reading is wide in the width direction for reduction room, and
Reduce mouth width under room and be more than reduction room width 10mm~200mm suitable for reading；The width of cooling chamber width suitable for reading and mouth under reduction room
Spend identical.
A kind of 7. external-heat coal base upright furnace for being used to produce DRI according to claim 1, it is characterised in that
The top regenerator and bottom regenerator form a unit regenerator, and each unit regenerator is corresponded with combustion chamber and set
Put.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711348674.0A CN107815516B (en) | 2017-12-15 | 2017-12-15 | External heating type coal-based vertical furnace for producing direct reduced iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711348674.0A CN107815516B (en) | 2017-12-15 | 2017-12-15 | External heating type coal-based vertical furnace for producing direct reduced iron |
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| Publication Number | Publication Date |
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| CN107815516A true CN107815516A (en) | 2018-03-20 |
| CN107815516B CN107815516B (en) | 2022-12-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711348674.0A Active CN107815516B (en) | 2017-12-15 | 2017-12-15 | External heating type coal-based vertical furnace for producing direct reduced iron |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108467913A (en) * | 2018-04-13 | 2018-08-31 | 中冶焦耐(大连)工程技术有限公司 | A kind of ultra-large volume coal base upright furnace producing direct reduced iron |
| CN108707716A (en) * | 2018-04-13 | 2018-10-26 | 中冶焦耐(大连)工程技术有限公司 | A kind of heating system and heating means of external-heat ultra-large volume coal base upright furnace |
| CN109609770A (en) * | 2018-12-29 | 2019-04-12 | 扬州宁达贵金属有限公司 | Natural gas germanium volatilization furnace |
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| CN87105044A (en) * | 1987-07-23 | 1988-01-13 | 冶金工业部鞍山焦化耐火材料设计研究院 | Band regenerator double charring room serialization upright carbonization furnace |
| CN87105025A (en) * | 1987-06-24 | 1988-02-10 | 冶金工业部鞍山焦化耐火材料设计研究院 | The single coking chamber continuous vertical of band regenerator charring furnace |
| JP2006070188A (en) * | 2004-09-03 | 2006-03-16 | Jfe Steel Kk | Coke oven and method of inhibiting attachment of carbon to upper part of carbonization chamber in coke oven |
| CN105349156A (en) * | 2015-12-02 | 2016-02-24 | 中冶焦耐工程技术有限公司 | Vertical furnace with sectional heating combustion chamber and heating method of vertical furnace |
| CN106086277A (en) * | 2016-08-03 | 2016-11-09 | 哈密坤铭钒钛科技有限公司 | A kind of regenerator type produces the external-heat coal base shaft furnace device of DRI |
| CN207738789U (en) * | 2017-12-15 | 2018-08-17 | 中冶焦耐(大连)工程技术有限公司 | A kind of external-heat coal base upright furnace for producing direct reduced iron |
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2017
- 2017-12-15 CN CN201711348674.0A patent/CN107815516B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN87105025A (en) * | 1987-06-24 | 1988-02-10 | 冶金工业部鞍山焦化耐火材料设计研究院 | The single coking chamber continuous vertical of band regenerator charring furnace |
| CN87105044A (en) * | 1987-07-23 | 1988-01-13 | 冶金工业部鞍山焦化耐火材料设计研究院 | Band regenerator double charring room serialization upright carbonization furnace |
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| CN105349156A (en) * | 2015-12-02 | 2016-02-24 | 中冶焦耐工程技术有限公司 | Vertical furnace with sectional heating combustion chamber and heating method of vertical furnace |
| CN106086277A (en) * | 2016-08-03 | 2016-11-09 | 哈密坤铭钒钛科技有限公司 | A kind of regenerator type produces the external-heat coal base shaft furnace device of DRI |
| CN207738789U (en) * | 2017-12-15 | 2018-08-17 | 中冶焦耐(大连)工程技术有限公司 | A kind of external-heat coal base upright furnace for producing direct reduced iron |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108467913A (en) * | 2018-04-13 | 2018-08-31 | 中冶焦耐(大连)工程技术有限公司 | A kind of ultra-large volume coal base upright furnace producing direct reduced iron |
| CN108707716A (en) * | 2018-04-13 | 2018-10-26 | 中冶焦耐(大连)工程技术有限公司 | A kind of heating system and heating means of external-heat ultra-large volume coal base upright furnace |
| CN109609770A (en) * | 2018-12-29 | 2019-04-12 | 扬州宁达贵金属有限公司 | Natural gas germanium volatilization furnace |
| CN109609770B (en) * | 2018-12-29 | 2023-09-15 | 江苏宁达环保股份有限公司 | Natural gas germanium volatilizer |
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| CN107815516B (en) | 2022-12-13 |
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