CN207738789U - A kind of external-heat coal base upright furnace for producing direct reduced iron - Google Patents
A kind of external-heat coal base upright furnace for producing direct reduced iron Download PDFInfo
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- CN207738789U CN207738789U CN201721754451.XU CN201721754451U CN207738789U CN 207738789 U CN207738789 U CN 207738789U CN 201721754451 U CN201721754451 U CN 201721754451U CN 207738789 U CN207738789 U CN 207738789U
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Abstract
The utility model is related to a kind of external-heat coal base upright furnaces for producing direct reduced iron, the cooling chamber wall of cooling chamber both sides is inwardly respectively equipped with cooled gas path along high, each cooled gas path is equipped with the outlet of multiple cooling gas or cooling gas inlet, and cooling gas outlet, cooling gas inlet are connected to cooling chamber inner space；The top that air flue connection combustion chamber is converged at top is set at the top of the top regenerative chamber, bottom sets top regenerative chamber bottom flue；Portion's regenerative chamber bottom flue is set at the top of the lower part regenerative chamber, bottom sets the bottom that air flue connection combustion chamber is converged in bottom.The process of the oxidation reaction of fuel combustion during direct reduction iron making, the gasification reaction of raw material, the reduction reaction of raw material, the cooling procedure of generated sponge iron and recycling high-temperature flue gas waste heat is concentrated in upright furnace carrying out by the utility model, has the characteristics that furnace structure is reasonable, converter life is long, hot working efficiency is high, auxiliary device investment is low, is easily achieved engineering.
Description
Technical field
The utility model is related to upright furnace technical field more particularly to a kind of external-heat coals for producing direct reduced iron
Base upright furnace.
Background technology
Direct reduction iron making technique (DRI) refer under the fusion temperature less than iron ore, by restoring in the solid state,
Iron ore refines the technical process at metallic iron, and 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 increases rapid.
However, the yield of China's direct reduced iron is not as good as million tons, it is flat far below the world less than the 1% of world's direct reduced iron yield
It is horizontal.Low-end product overproduction, high-end product underproduce the problem of 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..Currently, 90% or more direct reduced iron is all to use gas base in the world
What reduction method was produced, but China's natural gas resource is limited, higher price, gas-based reduction is not suitable for the more coals in China and lacks gas
National conditions, and traditional coal-based rotary kiln technique, rotary hearth furnace process, all to there is high energy consumption, production process in tunnel oven technique not easily-controllable
System, the problems such as product quality grade is low.
External-heat coal-based direct reduction has also been made certain research in studies in China person, 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 is perpendicular
Stove》, 204529897 U's of Publication No. CN《A kind of external-heat coal base shaft furnace producing direct reduced iron》Deng.It is above-mentioned to disclose
Technology, furnace structure is too simple, only include in shaft furnace the oxidation reaction of fuel combustion, raw material gasification reaction and original
The reduction reaction of material, converter life is short, hot working efficiency is low, is difficult to be engineered, and is all made of the sponge iron by high temperature outside stove
The type of cooling to be cooled down with water cooling equipment requires height, equipment investment big discharge apparatus and water cooling equipment high temperature resistant.
Invention content
The utility model provides a kind of external-heat coal base upright furnace for producing direct reduced iron, and direct-reduction is refined
The cooling of the oxidation reaction of fuel combustion during iron, the reduction reaction, generated sponge iron of the gasification reaction of raw material, raw material
Process and the process for recycling high-temperature flue gas waste heat concentrate in upright furnace carrying out, with furnace structure is reasonable, converter life is long, hot
Work is efficient, auxiliary device investment is low, is easily achieved the features such as engineering.
In order to achieve the above object, the utility model is realized using following technical scheme：
A kind of external-heat coal base upright furnace for producing direct reduced iron, including reduction room, combustion chamber, furnace roof, accumulation of heat
Room and cooling chamber；Combustion chamber and reduction room, cooling chamber occupy furnace body side, and regenerative chamber occupies the furnace body other side；Combustion chamber and also
Former room distributes alternately, and cooling chamber is located at the lower section of reduction room, and the top of cooling chamber is connected to reduction room；Furnace roof is located at combustion chamber
Top；Regenerative chamber includes top regenerative chamber and lower part regenerative chamber, top regenerative chamber, one end and the combustion chamber phase of lower part regenerative chamber
Logical, the other end is connected with waste gas valve, and checker brick are equipped in top regenerative chamber and lower part regenerative chamber；The cooling chamber both sides
Cooling chamber be respectively equipped with cooled gas path within the walls, multiple cooled gas paths along cooling chamber height to being uniformly arranged, Mei Geleng
But gas passage is grown along cooling chamber to being uniformly provided with the outlet of multiple cooling gas or cooling gas inlet, cooling gas outlet, cold
But gas access is connected to cooling chamber inner space；Top is set at the top of the top regenerative chamber converges air flue connection combustion chamber
Top, bottom set top regenerative chamber bottom flue；Portion's regenerative chamber bottom flue is set at the top of the lower part regenerative chamber, 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
It is all provided with cooling gas inlet on gas passage, cooling gas outlet is all provided in the cooled gas path of other side cooling chamber within the walls.
Cooling gas inlet, both sides cooling are all provided in the cooling chamber in the cooled gas path of both sides cooling chamber wall lower part
Cooling gas outlet is all provided in 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 threaded through in refractory brick.
The reduction room is that single reduction room, double reduction room or three rows restore room, and reduction room is suitable for reading narrow in the width direction
Lower mouth width, and restore mouth width degree under room and be more than reduction room width 10mm~200mm suitable for reading；Cooling chamber width suitable for reading and reduction room
Lower mouth it is of same size.
The top regenerative chamber and lower part regenerative chamber form a unit regenerative chamber, each unit regenerative chamber and combustion chamber one
One is correspondingly arranged.
Compared with prior art, the utility model has the beneficial effects that：
1) upright furnace body is reasonable for structure, and heat transfer condition is good, and converter life is long；
2) regenerative chamber is capable of the air of the waste heat preheated burning of recovered flue gas, and upright furnace hot working efficiency is high；
3) easy to operate, air flow rate is adjustable, easily controllable ignition temperature and speed, reduce high temperature dot, to reduce NOx
Generation, it is more conducively environmentally friendly；
4) cooling chamber can realize that product sponge iron is quickly cooled down in stove, reduce the superhigh temperature resistant to cooling equipment outside stove
It is required that, auxiliary device investment can be reduced, while improving production efficiency.
Description of the drawings
Fig. 1 is the furnace body longitudinal sectional view of upright furnace described in the utility model.
Fig. 2 is the A-A views in Fig. 1.
Fig. 3 is that cooling gas inlet described in the utility model exports distribution schematic diagram one with cooling gas.
Fig. 4 is that cooling gas inlet described in the utility model exports distribution schematic diagram two with cooling gas.
In figure：1. 2. furnace roof of top charging mouth, 3. combustion chamber 4. restores 5. cooling chamber of room, 6. cooled gas path 7.
Indoor 11. regenerative chamber of checker brick of 8. cooling chamber wall of heating wall, 9. top regenerator sealing wall, 10. top accumulation of heat and burning
12. top regenerative chamber bottom flue of division wall, 13. lower part 14. lower part regenerator sealing wall of regenerative chamber bottom flue, 15. lower part of room
17. flue partition of partition wall, 18. flue, 19. combustion chamber protection wall 20. in the middle part of indoor 16. combustion chamber of checker brick of accumulation of heat
It is suitable for reading that 21. cooling gas of cooling gas inlet exports 22. cooling chambers
Specific implementation mode
Specific embodiment of the present utility model 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 producing direct reduced iron described in the utility model,
Including reduction room 4, combustion chamber 3, furnace roof 2, regenerative chamber and cooling chamber 5；Combustion chamber 3 and reduction room 4, cooling chamber 5 occupy furnace body one
Side, regenerative chamber occupy the furnace body other side；Combustion chamber 3 and reduction room 4 distribute alternately, and cooling chamber 5 is located at the lower section of reduction room 4, cold
But the top of room 5 is connected to reduction room 4；Furnace roof 2 is located at the top of combustion chamber 3；Regenerative chamber includes that top regenerative chamber and lower part store
Hot cell, top regenerative chamber, lower part regenerative chamber one end communicated with combustion chamber 3, the other end is connected with waste gas valve, top accumulation of heat
It is equipped with checker brick 10/15 in room and lower part regenerative chamber；It is respectively equipped with cooling air in the cooling chamber wall 8 of 5 both sides of the cooling chamber
Body channel 6, multiple cooled gas paths 6 are high to being uniformly arranged along cooling chamber 5, each cooled gas path 6 along cooling chamber 5 grow to
Be uniformly provided with multiple cooling gas outlet 21 or cooling gas inlet 20, cooling gas outlet 21, cooling gas inlet 20 with it is cold
But 5 inner space of room is connected to；The top that air flue connection combustion chamber 3 is converged at top is set at the top of the top regenerative chamber, bottom is set
Top regenerative chamber bottom flue 12；Portion's regenerative chamber bottom flue 13 is set at the top of the lower part regenerative chamber, bottom sets bottom and converges gas
Road is connected to the bottom of combustion chamber 3.
The cooling gas inlet 20 or the opening direction of cooling gas outlet 21 are respectively facing 5 inside of cooling chamber obliquely downward
Side.
As shown in figure 3, the cooling gas inlet 20 and cooling gas outlet 21 are oppositely arranged；That is side in cooling chamber 5
Cooling gas inlet 20 is all provided in cooled gas path 6 in cooling chamber wall 8, the cooling gas in other side cooling chamber wall 8 is logical
Cooling gas outlet 21 is all provided on road 6.
As shown in figure 4, being all provided with cooling gas in the cooled gas path 6 of 8 lower part of both sides cooling chamber wall in the cooling chamber 5
Entrance 20 is all provided with cooling gas outlet 21 in the cooled gas path 6 on 8 top of both sides cooling chamber wall.
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 threaded through in refractory brick forms.
The reduction room 4 is that single reduction room, double reduction room or three rows restore room, and reduction room 4 is suitable for reading in the width direction
Narrow lower mouth width, and restore mouth width degree under room and be more than reduction room width 10mm~200mm suitable for reading；The width of cooling chamber suitable for reading 22 with also
Mouth is of same size under former room.
The top regenerative chamber and lower part regenerative chamber form a unit regenerative chamber, each unit regenerative chamber and combustion chamber 3
It is arranged in a one-to-one correspondence.
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；Restore room 4 by both sides reduction room wall, regenerative chamber 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, regenerative chamber wall, protection wall and discharge gate furnace retaining iron
Part surrounds composition.Set regenerative chamber partition wall between top regenerative chamber and lower part regenerative chamber, top regenerative chamber, lower part regenerative chamber with
The adjacent side in combustion chamber sets the division wall 11 of regenerative chamber and combustion chamber, and the other side sets top regenerator sealing wall 9 respectively and lower part stores
Hot cell protection wall 14.Furnace roof sets top charging mouth 1.
In the utility model, the cooling gas conveyed by correspondence cooled gas path 6 is cold by the entrance of cooling gas inlet 20
But room 5, cooling gas in the horizontal direction or flow up in cooling chamber 5, and the high-temperature sponge iron direct heat transfer to flow downward,
800 DEG C~1000 DEG C of high-temperature sponge iron can be cooled within the scope of 100 DEG C~350 DEG C, the cooling gas after heat exchange is by cooling down
Gas vent 21 leaves cooling chamber 5 by corresponding cooled gas path 6.Cooling gas is the generation of direct reduction iron making reaction
The inert gases such as nitrogen can also be used in the gaseous mixture of gas, predominantly carbon monoxide and carbon dioxide.
Cooled gas path 6 equipped with cooling gas inlet 20 respectively with enter furnace gas pipeline (wind turbine positive pressure outlet end) even
It connects, the cooled gas path 6 for being equipped with cooling gas outlet 21 is connect with aspirating air pipe (blower negative pressure arrival end) respectively.
Top regenerative chamber and lower part regenerative chamber form a unit regenerative chamber, and each unit regenerative chamber and combustion chamber 3 are one by one
It is correspondingly arranged, flue 18 temperature controllability in combustion chamber is strong.
In first exchange cycle, air enters top regenerative chamber bottom flue 12 by waste gas valve, by top
After the indoor checker brick 10 of accumulation of heat preheat, converges air flue through top and enter the participation burning of combustion chamber flue 18, the heat after burning
Exhaust gas enters bottom by 3 bottom of combustion chamber and converges air flue, after carrying out heat exchange with the indoor checker brick 15 of lower part accumulation of heat, passes through
The bottom flue 13 of lower part regenerative chamber enters chimney through waste gas valve；
In second exchange cycle, air enters the bottom flue 13 of lower part regenerative chamber by waste gas valve, under
After accumulation of heat indoor checker brick 15 in portion's preheat, converges air flue through bottom and enter the participation burning of combustion chamber flue 18, after burning
Hot waste gas enters top by 3 top of combustion chamber and converges air flue, after carrying out heat exchange with the indoor checker brick 10 of top accumulation of heat, leads to
The bottom flue 12 for crossing top regenerative chamber enters chimney through waste gas valve；
In different exchange cycles, the gas-flow resistance by top regenerative chamber and lower part regenerative chamber is same or similar, founds fire
Pressure distribution is more stablized in road 18, and temperature fluctuation controllability is strong in production process, advantageously reduces nitrogen oxide emission.
The preferable specific implementation mode of the above, only the utility model, but the scope of protection of the utility model is not
Be confined to this, any one skilled in the art within the technical scope disclosed by the utility model, according to this practicality
Novel technical solution and its utility model design are subject to equivalent substitution or change, should all cover the protection model in the utility model
Within enclosing.
Claims (7)
1. a kind of external-heat coal base upright furnace for producing direct reduced iron, including reduction room, combustion chamber, furnace roof, regenerative chamber
And cooling chamber；Combustion chamber and reduction room, cooling chamber occupy furnace body side, and regenerative chamber occupies the furnace body other side；Combustion chamber and reduction
Room distributes alternately, and cooling chamber is located at the lower section of reduction room, and the top of cooling chamber is connected to reduction room；Furnace roof is located at the upper of combustion chamber
Portion；Regenerative chamber includes top regenerative chamber and lower part regenerative chamber, top regenerative chamber, lower part regenerative chamber one end communicated with combustion chamber,
The other end is connected with waste gas valve, and checker brick are equipped in top regenerative chamber and lower part regenerative chamber；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 setting, each cooled gas path is grown along cooling chamber to being uniformly provided with multiple cooling gas outlets or cooling gas inlet, cold
But gas vent, cooling gas inlet are connected to cooling chamber inner space；Top is set at the top of the top regenerative chamber converges gas
Road is connected to the top of combustion chamber, and bottom sets top regenerative chamber bottom flue；It is small that portion's regenerative chamber is set at the top of the lower part regenerative chamber
Flue, bottom set the bottom that air flue connection combustion chamber is converged in bottom.
2. a kind of external-heat coal base upright furnace for producing direct reduced iron according to claim 1, which is characterized 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.
3. a kind of external-heat coal base upright furnace for producing direct reduced iron according to claim 1, which is characterized 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 in the cooled gas path of other side cooling chamber within the walls cooling gas outlet.
4. a kind of external-heat coal base upright furnace for producing direct reduced iron according to claim 1, which is characterized in that
Cooling gas inlet, both sides cooling chamber wall top are all provided in the cooling chamber in the cooled gas path of both sides cooling chamber wall lower part
Cooled gas path on be all provided with cooling gas outlet.
5. a kind of external-heat coal base upright furnace for producing direct reduced iron according to claim 1, which is characterized 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 threaded through
Stainless steel tube composition in firebrick.
6. a kind of external-heat coal base upright furnace for producing direct reduced iron according to claim 1, which is characterized in that
The reduction room is that single reduction room, double reduction room or three rows restore room, restores room narrow lower mouth width suitable for reading in the width direction, and
It restores mouth width degree under room and is more than reduction room width 10mm~200mm suitable for reading；The width of cooling chamber width suitable for reading and mouth under reduction room
It spends identical.
7. a kind of external-heat coal base upright furnace for producing direct reduced iron according to claim 1, which is characterized in that
The top regenerative chamber and lower part regenerative chamber form a unit regenerative chamber, and each unit regenerative chamber is corresponded with combustion chamber and set
It sets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721754451.XU CN207738789U (en) | 2017-12-15 | 2017-12-15 | A kind of external-heat coal base upright furnace for producing direct reduced iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721754451.XU CN207738789U (en) | 2017-12-15 | 2017-12-15 | A kind of external-heat coal base upright furnace for producing direct reduced iron |
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| Publication Number | Publication Date |
|---|---|
| CN207738789U true CN207738789U (en) | 2018-08-17 |
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ID=63118140
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721754451.XU Withdrawn - After Issue CN207738789U (en) | 2017-12-15 | 2017-12-15 | A kind of external-heat coal base upright furnace for producing direct reduced iron |
Country Status (1)
| Country | Link |
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| CN (1) | CN207738789U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107815516A (en) * | 2017-12-15 | 2018-03-20 | 中冶焦耐(大连)工程技术有限公司 | A kind of external-heat coal base upright furnace for being used to produce DRI |
-
2017
- 2017-12-15 CN CN201721754451.XU patent/CN207738789U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107815516A (en) * | 2017-12-15 | 2018-03-20 | 中冶焦耐(大连)工程技术有限公司 | A kind of external-heat coal base upright furnace for being used to produce DRI |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20180817 Effective date of abandoning: 20221213 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20180817 Effective date of abandoning: 20221213 |