CN207738790U - A kind of cooling chamber for producing the external-heat coal base upright furnace of direct reduced iron - Google Patents
A kind of cooling chamber for producing the external-heat coal base upright furnace of direct reduced iron Download PDFInfo
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- CN207738790U CN207738790U CN201721754483.XU CN201721754483U CN207738790U CN 207738790 U CN207738790 U CN 207738790U CN 201721754483 U CN201721754483 U CN 201721754483U CN 207738790 U CN207738790 U CN 207738790U
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- cooling chamber
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Abstract
The utility model is related to a kind of cooling chambers for producing the external-heat coal base upright furnace of direct reduced iron, the cooling chamber of cooling chamber both sides is respectively equipped with cooled gas path within the walls, multiple cooled gas paths are along cooling chamber height to being uniformly arranged, each cooled gas path is grown along cooling chamber to multiple cooling gas inlets are uniformly provided with, and cooling gas inlet is connected to cooling chamber inner space and opening direction is towards obliquely downward on the inside of cooling chamber；Cooling chamber is suitable for reading to be exported for cooling gas；Each cooled gas path respectively with enter furnace gas pipeline or inert gas duct is connected to.The utility model makes high-temperature sponge iron be cooled down with gas direct heat transfer in cooling chamber, it is matched with the indirect heat exchange cooling of water cooling plant outside stove, the heat exchange efficiency of cooling procedure can either be improved, the reaction rate of reduction reaction is improved by indoor reducing atmosphere concentration can be restored by improving again, while the high temperature resistant requirement to discharge device outside stove and water cooling plant can be reduced.
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
The cooling chamber of base upright furnace.
Background technology
Steel and iron industry in order to adapt to increasing environmental protection requirement, optimize the structure of production by reduction steel energy consumption,
Improve product quality and quality, seek the approach for solving steel scrap shortage so that direct reduction iron making technique (DRI) increasingly by
Pay attention to, the research of direct reduction iron making technique is flourishing.Direct reduction iron making is divided into gas base directly reducing by technique
With two kinds of coal-based direct reduction, the characteristics of China's natural gas resource shortage but rich coal resources, coal-based direct reduction is determined
Technology is the preferred technique of China's Development of Direct-Reduced Iron.
By reduction apparatus Type division, coal-based direct reduction iron technique generally can be divided into coal base shaft furnace process, tunnel firer
Skill, rotary kiln technology and rotary hearth furnace process.All there is low output, energy consumption in tunnel oven technique, rotary kiln technology and rotary hearth furnace process
High, the shortcomings of coal consumption of ton iron is big, deficiency in economic performance, it is difficult to obtain large-scale application development.Coal base shaft furnace process is with Italy
KM flows be representative, in shaft furnace occur fuel combustion oxidation reaction, the gasification reaction of raw material and the reduction reaction of raw material,
The mode that the high-temperature sponge iron of generation cools down in stove external application water cooling equipment cools down, and due to the high-temperature sponge iron of generation, its temperature exists
Between 800 DEG C~1050 DEG C, therefore require height, equipment investment huge discharge apparatus and water cooling equipment high temperature resistant, former Ministry of Metallurgical Industry
Once some unit development test KM flow process in organizing nation, but because the reasons such as investment cost height fail to implement.
Application No. is 201611050878.1 Chinese patents to disclose " a kind of based shaft kiln directly reduced technique of coal ", wherein
Record that " after the completion of reduction, mixture is cooled to 500-850 DEG C of hot drop temperature or cold drop temperature 50-150 by cooling section
After DEG C, discharged out of the furnace by the discharge device of coal base shaft furnace；" but its for how to realize that detailed note is not done in the cooling of furnace charge
It carries.
Invention content
The utility model provides a kind of cooling chamber for producing the external-heat coal base upright furnace of direct reduced iron, straight
In vertical stove except occur the oxidation reaction of fuel combustion, the gasification reaction of raw material, raw material reduction reaction in addition to, the high temperature sponge of generation
Iron can also carry out gas direct heat transfer cooling in cooling chamber, be matched with the indirect heat exchange cooling of water cooling plant outside stove, can
Reduction reaction is improved by enough improving the heat exchange efficiency of cooling procedure, and indoor reducing atmosphere concentration can be restored by improving
Reaction rate, while the high temperature resistant requirement to discharge device outside stove and water cooling plant can be reduced, reduce auxiliary device investment.
In order to achieve the above object, the utility model is realized using following technical scheme：
A kind of cooling chamber for producing the external-heat coal base upright furnace of direct reduced iron, the cooling chamber is by the cold of both sides
But room wall, regenerative chamber wall, protection wall and discharge gate furnace retaining ironware surround composition, and the top of cooling chamber is connected to reduction room；Institute
The cooling chamber for stating both sides is respectively equipped with cooled gas path within the walls, multiple cooled gas paths along cooling chamber height to being uniformly arranged,
Each cooled gas path is grown along cooling chamber to being uniformly provided with multiple cooling gas inlets, cooling gas inlet with inside cooling chamber
Space is connected to and opening direction is towards obliquely downward on the inside of cooling chamber；Cooling chamber is suitable for reading to be exported for cooling gas；Each cooling air
Body channel respectively with enter furnace gas pipeline or inert gas duct is connected to.
The cooled gas path and cooling gas inlet are formed by laying fireproof bricks respectively, or by being threaded through in refractory brick
Stainless steel tube composition, the diameter of cooling gas inlet is less than the diameter of cooled gas path.
For the cooling chamber wall from being formed to the multiple layer refractory brick built by laying bricks or stones along height, cooled gas path is set to odd-level or even number
In the refractory brick of layer.
Cooling chamber width suitable for reading and the width of mouth under reduction room match, and the width of mouth is more than in cooling chamber under cooling chamber
The width of mouth.
Compared with prior art, the utility model has the beneficial effects that：
1) gas direct heat transfer cooling can be achieved in upright furnace, matched with water cooling plant indirect heat exchange cooling outside stove,
The heat exchange efficiency of cooling procedure can be improved；
2) when using the generation gas of direct reduction iron making reaction as cooling gas, the indoor reproducibility gas of reduction can be improved
Atmosphere concentration, to improve the reaction rate of reduction reaction；
3) since high-temperature sponge iron can be cooled within the scope of 100 DEG C~350 DEG C by furnace gas direct heat transfer cooling,
It is not required to propose high temperature resistant requirement to discharge device outside stove and water cooling plant again, auxiliary device investment can be reduced.
Description of the drawings
Fig. 1 is the longitudinal sectional view of cooling chamber described in the utility model.
Fig. 2 is the A-A views in Fig. 1.
In figure：1. mouth under 4. cooling gas inlet of cooling chamber 2. cooling chamber wall, 3. cooled gas path suitable for reading, 5. cooling chamber
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
Cooling chamber, the cooling chamber surrounds group by the cooling chamber wall 2 of both sides, regenerative chamber wall, protection wall and discharge gate furnace retaining ironware
At the top of cooling chamber is connected to reduction room；It is respectively equipped with cooled gas path 3, Duo Geleng in the cooling chamber wall 2 of the both sides
But gas passage 3 along cooling chamber height to being uniformly arranged, grow along cooling chamber to being uniformly provided with multiple coolings by each cooled gas path 3
Gas access 4, cooling gas inlet 4 is connected to cooling chamber inner space and opening direction is towards obliquely downward on the inside of cooling chamber；
Cooling chamber suitable for reading 1 exports for cooling gas；Each cooled gas path 3 respectively with enter furnace gas pipeline or inert gas duct connects
It is logical.
The cooled gas path 3 and cooling gas inlet 4 are formed by laying fireproof bricks respectively, or by being threaded through refractory brick
In stainless steel tube composition, the diameter of cooling gas inlet 4 is less than the diameter of cooled gas path 3.
For the cooling chamber wall 2 from being formed to the multiple layer refractory brick built by laying bricks or stones along height, cooled gas path 3 is set to odd-level or idol
In several layers of refractory brick.
The width of cooling chamber suitable for reading 1 and the width of mouth under reduction room match, and the width of mouth 5 is more than cooling chamber under cooling chamber
Suitable for reading 1 width.
In the utility model, in the cooling chamber of external-heat coal base upright furnace for producing direct reduced iron, by cold
But the cooling gas of gas passage 3 and cooling gas inlet 4 into cooling chamber flows from bottom to top, with the sea flowed from top to bottom
800 DEG C~1000 DEG C of high-temperature sponge iron is cooled to 100 DEG C~350 DEG C by the continuous direct reverse heat-exchange of iron；After exchanging heat with sponge iron
Cooling gas enter in reduction room from cooling chamber suitable for reading 1 and participate in reduction reaction, the indoor reducing atmosphere of reduction can be improved
Concentration improves the reaction rate of reduction reaction.
The cooling gas being passed through in cooled gas path is the generation gas of direct reduction iron making reaction, predominantly carbon monoxide
With the gaseous mixture of carbon dioxide, the inert gases such as nitrogen can also be used.
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 (4)
1. it is a kind of for produce direct reduced iron external-heat coal base upright furnace cooling chamber, the cooling chamber by both sides cooling
Room wall, regenerative chamber wall, protection wall and discharge gate furnace retaining ironware surround composition, and the top of cooling chamber is connected to reduction room；It is special
Sign is, the cooling chambers of the both sides is respectively equipped with cooled gas path within the walls, multiple cooled gas paths along cooling chamber height to
Be uniformly arranged, each cooled gas path is grown along cooling chamber to being uniformly provided with multiple cooling gas inlets, cooling gas inlet with
Cooling chamber inner space is connected to and opening direction is towards obliquely downward on the inside of cooling chamber；Cooling chamber is suitable for reading to be exported for cooling gas；
Each cooled gas path respectively with enter furnace gas pipeline or inert gas duct is connected to.
2. a kind of cooling chamber for producing the external-heat coal base upright furnace of direct reduced iron according to claim 1,
It is characterized in that, the cooled gas path and cooling gas inlet are formed by laying fireproof bricks respectively, or by being threaded through refractory brick
In stainless steel tube composition, the diameter of cooling gas inlet is less than the diameter of cooled gas path.
3. a kind of cooling chamber for producing the external-heat coal base upright furnace of direct reduced iron according to claim 1,
It is characterized in that, for the cooling chamber wall from being formed to the multiple layer refractory brick built by laying bricks or stones along height, cooled gas path is set to odd-level or idol
In several layers of refractory brick.
4. a kind of cooling chamber for producing the external-heat coal base upright furnace of direct reduced iron according to claim 1,
It is characterized in that, cooling chamber width suitable for reading and the width of mouth under reduction room match, and the width of mouth is more than cooling chamber under cooling chamber
Width suitable for reading.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721754483.XU CN207738790U (en) | 2017-12-15 | 2017-12-15 | A kind of cooling chamber for producing the external-heat coal base upright furnace of direct reduced iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721754483.XU CN207738790U (en) | 2017-12-15 | 2017-12-15 | A kind of cooling chamber for producing the external-heat coal base upright furnace of direct reduced iron |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207738790U true CN207738790U (en) | 2018-08-17 |
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ID=63118146
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721754483.XU Active CN207738790U (en) | 2017-12-15 | 2017-12-15 | A kind of cooling chamber for producing the external-heat coal base upright furnace of direct reduced iron |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107881279A (en) * | 2017-12-15 | 2018-04-06 | 中冶焦耐(大连)工程技术有限公司 | A kind of cooling chamber for being used to produce the external-heat coal base upright furnace of DRI |
-
2017
- 2017-12-15 CN CN201721754483.XU patent/CN207738790U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107881279A (en) * | 2017-12-15 | 2018-04-06 | 中冶焦耐(大连)工程技术有限公司 | A kind of cooling chamber for being used to produce the external-heat coal base upright furnace of DRI |
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