CN206467264U - The system that a kind of use gas base method produces DRI - Google Patents
The system that a kind of use gas base method produces DRI Download PDFInfo
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- CN206467264U CN206467264U CN201621390569.4U CN201621390569U CN206467264U CN 206467264 U CN206467264 U CN 206467264U CN 201621390569 U CN201621390569 U CN 201621390569U CN 206467264 U CN206467264 U CN 206467264U
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- 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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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- Y02P10/10—Reduction of greenhouse gas [GHG] emissions
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Abstract
The utility model discloses the system that a kind of use gas base method produces DRI.The system includes：Gas-based shaft kiln, with iron ore entrance, also Primordial Qi entrance, the outlet of high temperature furnace top gas and DRI outlet；Nonaqueous dust cleaner, is exported with high temperature furnace top gas entrance and dedusting top gas, and high temperature furnace top gas entrance is connected with the outlet of high temperature furnace top gas；Compressor, with top gas entrance and the outlet of compression top gas, top gas entrance is connected with the outlet of dedusting top gas；Devulcanizer, is exported with gas inlet and desulphurised natural gas；Section oxidation and reformation stove, with the first desulphurised natural gas entrance, the second desulphurised natural gas entrance, oxygen intake, compression top gas entrance and also Primordial Qi outlet, first desulphurised natural gas entrance and the second desulphurised natural gas entrance are connected with desulphurised natural gas outlet respectively, and compression top gas entrance is connected with the outlet of compression top gas.DRI degree of metalization made from the utility model is high, and production cost is low.
Description
Technical field
The utility model belongs to direct reduction processes of Iron ores field, and in particular to one kind is using the production direct-reduction of gas base method
The system of iron.
Background technology
DRI (DRI) is also known as sponge iron, is iron ore less than being reduced directly obtained iron content under fusion temperature
Product.Sponge iron is a kind of substitute of steel scrap, is electric furnace refining clean steel, the indispensable impurity diluent of high-quality steel, is to turn
Stove makes steel the cooling agent of high-quality, is to develop the indispensable raw material of Ferrous Metallurgy short route.
The technique of production DRI is referred to as direct-reduction process, belongs to non-blast furnace ironmaking technique, is divided into gas base method and coal
The major class of base method two.Wherein, 76% DRI is produced by gas base method.Gas base method using also Primordial Qi (its mainly into
It is divided into CO and H2) reducing iron ore, prepare DRI.At present, also Primordial Qi is main is made by raw material of natural gas.It is existing
Using natural gas prepare also Primordial Qi technique institute calorific requirement is more, equipment expensive, cause the cost of DRI of gained also very
It is high.
Utility model content
The purpose of this utility model is to provide the new technology that a kind of use gas base method produces DRI, and reduction is directly also
The production cost of former iron.
The utility model provides the system that DRI is produced using gas base method, and the system includes：
Gas-based shaft kiln, with iron ore entrance, also Primordial Qi entrance, the outlet of high temperature furnace top gas and DRI outlet；
Nonaqueous dust cleaner, is exported, the high temperature furnace top gas entrance and institute with high temperature furnace top gas entrance and dedusting top gas
The high temperature furnace top gas outlet for stating gas-based shaft kiln is connected；
Compressor, with top gas entrance and the outlet of compression top gas, the top gas entrance and the nonaqueous dust cleaner
Dedusting top gas outlet be connected；
Devulcanizer, is exported with gas inlet and desulphurised natural gas；
Section oxidation-reformer, with the first desulphurised natural gas entrance, the second desulphurised natural gas entrance, oxygen
Entrance, compression top gas entrance and also Primordial Qi outlet, the first desulphurised natural gas entrance and second desulphurised natural gas enter
Mouth is connected with the desulphurised natural gas outlet of the devulcanizer respectively, the compression stove of the compression top gas entrance and the compressor
Top gas outlet is connected；
Section oxidation-the reformer includes partial oxidation unit and reformer, the partial oxidation unit
Positioned at the lower section of the reformer, the first desulphurised natural gas entrance and the oxygen intake are arranged on the partial oxidation
On device, the second desulphurised natural gas entrance, the compression top gas entrance and the also Primordial Qi outlet are arranged on described heavy
In engagement positions.
In some embodiments of the present utility model, the system also includes heat exchanger, and the heat exchanger has dust-filtered furnace
Top gas entrance, cryogenic natural gas entrance, the outlet of low temperature top gas and preheating gas outlet, the dedusting top gas entrance and institute
The dedusting top gas outlet for stating nonaqueous dust cleaner is connected, the low temperature top gas outlet and the top gas entrance phase of the compressor
Even, the preheating gas outlet is connected with the gas inlet of the devulcanizer.
In some embodiments of the present utility model, the system also includes heating furnace, and the heating furnace has fuel gas
Entrance, low temperature compression top gas entrance and the outlet of high temperature compressed top gas, the low temperature of the fuel gas entrance and the heat exchanger
Top gas outlet is connected, and the low temperature compression top gas entrance is connected with the compression top gas outlet of the compressor, the height
The outlet of temperature and pressure contracting top gas is connected with the compression top gas entrance of the section oxidation-reformer.
Also Primordial Qi used in the utility model aoxidized by section-and reformer is made.Section oxidation-the weight
Whole stove is first aoxidized with natural gas with oxygen, then the mixed gas produced with oxidation carries out reforming instead with natural gas and top gas
Should, prepare also Primordial Qi.The oxidation reaction of natural gas and oxygen is exothermic reaction, and obtained mixed gas is high-temperature gas mixture body,
Therefore, in reforming reaction, without outside heat supply, production cost is reduced.
In addition, the section oxidation-reformer is simple in construction, and in use without expensive nickel-base catalyst,
Maintenance cost is low.
In addition, top gas is when being recycled, without carrying out carbonization treatment, the equipment in system is reduced, is reduced
Production cost.
Secondly, the obtained also Primordial Qi quality height of the utility model, reducing power are strong, also CO and H in Primordial Qi2Content be higher than
85%, and also the content of Primordial Qi reclaimed water steam is less than 5%.
Brief description of the drawings
Fig. 1 produces the structural representation of the system of DRI for a kind of use gas base method in the utility model embodiment
Figure.
Embodiment
Below in conjunction with drawings and examples, embodiment of the present utility model is described in more details, with
Just scheme of the present utility model and the advantage of its various aspects be better understood when.However, specific implementations described below
Mode and embodiment are only the purposes of explanation, rather than to limitation of the present utility model.
The system for the use gas base method production DRI that the utility model is provided includes：Gas-based shaft kiln, with iron ore
Stone entrance, also Primordial Qi entrance, the outlet of high temperature furnace top gas and DRI outlet；Nonaqueous dust cleaner, enters with high temperature furnace top gas
Mouth and the outlet of dedusting top gas, high temperature furnace top gas entrance are connected with the high temperature furnace top gas outlet of gas-based shaft kiln；Compressor, with stove
Top gas entrance and the outlet of compression top gas, top gas entrance are connected with the dedusting top gas outlet of nonaqueous dust cleaner；Devulcanizer, tool
There are gas inlet and desulphurised natural gas outlet；Section oxidation-reformer, with the first desulphurised natural gas entrance,
Two desulphurised natural gas entrances, oxygen intake, compression top gas entrance and also Primordial Qi outlet, the first desulphurised natural gas entrance and second
Desulphurised natural gas entrance is connected with the desulphurised natural gas outlet of devulcanizer respectively, the compression stove of compression top gas entrance and compressor
Top gas outlet is connected.
Section oxidation-reformer that the utility model is used includes partial oxidation unit and reformer, part
Oxidation unit is located at the lower section of reformer, and the first desulphurised natural gas entrance and oxygen intake are arranged on partial oxidation unit,
Second desulphurised natural gas entrance, compression top gas entrance and also Primordial Qi outlet are arranged on reformer.
Section oxidation-the reformer is first aoxidized with natural gas with oxygen, then the gaseous mixture produced with oxidation
Body carries out reforming reaction with natural gas and compression top gas, prepares also Primordial Qi.The oxidation reaction of natural gas and oxygen is that heat release is anti-
Should, obtained mixed gas is high-temperature gas mixture body, therefore, in reforming reaction, without outside heat supply, reduces and is produced into
This.
Also many CO and H are contained in top gas2, after overcompression, reforming, remaining gas is largely CO and H2, this reality
It is mixed with reducing gas made from natural gas with new, for reducing iron ore.In the utility model, top gas is entered one
Step is utilized, and the production cost of DRI is not only reduced, while it also avoid N in top gas2Enrichment.In addition, furnace roof
Gas, without carrying out carbonization treatment, reduces the equipment in system, reduces production cost when being recycled.
In addition, the section oxidation-reformer is simple in construction, and in use without expensive nickel-base catalyst,
Maintenance cost is low.
The obtained also Primordial Qi quality of said system is high, reducing power is strong, also CO and H in Primordial Qi2Content be higher than 85%, and
Also the content of Primordial Qi reclaimed water steam is less than 5%.
Secondly, also the reaction of Primordial Qi reducing iron ore is the endothermic reaction, and is discharged from the section oxidation-reformer
Reduction temperature degree it is higher, a part of heat can be provided for the reduction reaction of iron ore, the production of DRI is reduced
Cost.
In the utility model preferred embodiment, with reference to Fig. 1, said system also includes heat exchanger, and heat exchanger, which has, to be removed
Dirt top gas entrance, cryogenic natural gas entrance, the outlet of low temperature top gas and preheating gas outlet, dedusting top gas entrance is with doing
The dedusting top gas outlet of method deduster is connected, and the outlet of low temperature top gas is connected with the top gas entrance of compressor, and preheating is natural
Gas outlet is connected with the gas inlet of devulcanizer.
Wherein, heat exchanger is used for the heat for reclaiming high temperature furnace top gas, and the heat of recovery be used to preheat natural gas, heat profit
It is high with rate.
In the further preferred embodiment of the utility model, with reference to Fig. 1, said system still further comprises heating furnace.
Heating furnace has fuel gas entrance, low temperature compression top gas entrance and the outlet of high temperature compressed top gas, fuel gas entrance and heat exchange
The low temperature top gas outlet of device is connected, and low temperature compression top gas entrance is connected with the compression top gas outlet of compressor, high-temperature high-pressure
The outlet of contracting top gas is connected with the compression top gas entrance of section oxidation-reformer.
It is the same as those described above, many CO and H is contained in top gas2, in above preferred embodiment, a part of top gas is through overvoltage
Contracting and reformation processing, for preparing also Primordial Qi；Another part top gas is burned, and the obtained heat that burns is used for pre- hot compression stove
Top gas, can provide heat for reforming reaction, reduce the production cost of DRI.
It should be noted that the percentage composition of all gases referred to of the utility model is volume content, the hundred of gas
It is percent by volume to divide ratio.
Below with reference to specific embodiment, the utility model is illustrated.Institute's taking technique condition value in following embodiments
It is exemplary, its desirable number range is as shown in foregoing utility model content.Detection method used in following embodiments
It is the conventional detection method of the industry.
Embodiment 1
The present embodiment provides the system that a kind of use gas base method produces DRI, and Fig. 1 is its structural representation.
As shown in figure 1, the system includes：Gas-based shaft kiln 1, nonaqueous dust cleaner 2, devulcanizer 3, compressor 4, section
Oxidation-reformer 5, heat exchanger 6 and heating furnace 7.
Gas-based shaft kiln 1 has iron ore entrance, also Primordial Qi entrance, the outlet of high temperature furnace top gas and DRI outlet.
There is nonaqueous dust cleaner 2 high temperature furnace top gas entrance and dedusting top gas to export, and high temperature furnace top gas entrance is erected with gas base
The high temperature furnace top gas outlet of stove 1 is connected.
There is heat exchanger 6 dedusting top gas entrance, cryogenic natural gas entrance, the outlet of low temperature top gas and preheating natural gas to go out
Mouthful, dedusting top gas entrance is connected with the dedusting top gas outlet of nonaqueous dust cleaner 2.
There is devulcanizer 3 gas inlet and desulphurised natural gas to export, the preheating natural gas of gas inlet and heat exchanger 6
Outlet is connected.
Compressor 4 has top gas entrance and the outlet of compression top gas, the low temperature top gas of top gas entrance and heat exchanger 6
Outlet is connected.
Heating furnace 7 has fuel gas entrance, low temperature compression top gas entrance and the outlet of high temperature compressed top gas, and fuel gas enters
Mouth is connected with the low temperature top gas outlet of heat exchanger 6, and the compression top gas of low temperature compression top gas entrance and compressor 4 exports phase
Even.
Section oxidation-reformer 5 has the first desulphurised natural gas entrance, the second desulphurised natural gas entrance, oxygen
Entrance, compression top gas entrance and also Primordial Qi outlet, the first desulphurised natural gas entrance and the second desulphurised natural gas entrance respectively with
The desulphurised natural gas outlet of devulcanizer 3 is connected, and compression top gas entrance is connected with the high temperature compressed top gas outlet of heating furnace 7,
Also Primordial Qi outlet is connected with the also Primordial Qi entrance of gas-based shaft kiln 1.
As shown in figure 1, section oxidation-reformer 5 includes partial oxidation unit (the segmented portion i.e. shown in Fig. 1
The lower section of dotted line in point oxidation-reformer 5) and reformer (in section oxidation-reformer 5 i.e. shown in Fig. 1
The top of dotted line), partial oxidation unit is located at the lower section of reformer, and the first desulphurised natural gas entrance and oxygen intake are arranged on
On partial oxidation unit, the second desulphurised natural gas entrance, compression top gas entrance and also Primordial Qi outlet are arranged on reformer.
Embodiment 2
The present embodiment is using the system production DRI described in embodiment 1, and idiographic flow is as follows：
Prepare raw material：Prepare natural gas, oxygen, iron ore.
Prepare also Primordial Qi：
1) the High-temperature furnace top pneumatic transmission discharged from gas-based shaft kiln 1 is entered into dust separation in nonaqueous dust cleaner 2, then by after dedusting
Top gas and heat exchange gas, high temperature furnace top gas are changed into low temperature top gas.
2) 72% low temperature top gas is sent into compressor 4 and compressed, obtain compression top gas.By remaining 28% it is low
Burnt in warm top gas feeding heating furnace 7, and with the pre- hot compression top gas of heat of generation.The temperature of compression top gas after preheating
About 960 DEG C of degree.
3) natural gas after preheating is sent into desulfurization in devulcanizer 3.78% desulphurised natural gas is admitted to section
The partial oxidation unit of oxidation-reformer 5 and the oxygen of preheating carry out partial oxidation reaction, and mixed gas, reaction temperature is made
For 1320 DEG C.Mixed gas is further fed into the reformer of section oxidation-reformer 4, with remaining 22%
Desulphurised natural gas and compression top gas carry out reforming reaction, generation also Primordial Qi.The obtained mixing also temperature of Primordial Qi is about
860 DEG C, the content of mixing also Primordial Qi reclaimed water steam is 4.5%, CO and H2Content be 88%.
Reducing iron ore：Reduction pneumatic transmission is entered into reducing iron ore in gas-based shaft kiln 1, DRI is prepared.It is obtained straight
The degree of metalization for connecing reduced iron is 93%.
Embodiment 3
The present embodiment is using the system production DRI described in embodiment 1, and idiographic flow is as follows：
Prepare raw material：Prepare natural gas, oxygen, iron ore.
Prepare also Primordial Qi：
1) the High-temperature furnace top pneumatic transmission discharged from gas-based shaft kiln 1 is entered into dust separation in nonaqueous dust cleaner 2, then by after dedusting
Top gas and heat exchange gas, high temperature furnace top gas are changed into low temperature top gas.
2) 66% low temperature top gas is sent into compressor 4 and compressed, obtain compression top gas.By remaining 34% it is low
Burnt in warm top gas feeding heating furnace 7, and with the pre- hot compression top gas of heat of generation.The temperature of compression top gas after preheating
About 990 DEG C of degree.
3) natural gas after preheating is sent into desulfurization in devulcanizer 3.75% desulphurised natural gas is admitted to section
The partial oxidation unit of oxidation-reformer 5 and the oxygen of preheating carry out partial oxidation reaction, and mixed gas, reaction temperature is made
For 1270 DEG C.Mixed gas is further fed into the reformer of section oxidation-reformer 4, with remaining 25%
Desulphurised natural gas and compression top gas carry out reforming reaction, generation also Primordial Qi.The temperature of obtained mixing also Primordial Qi is about 830
DEG C, the content of mixing also Primordial Qi reclaimed water steam is 4.7%, CO and H2Content be 90%.
Reducing iron ore：Reduction pneumatic transmission is entered into reducing iron ore in gas-based shaft kiln 1, DRI is prepared.It is obtained straight
The degree of metalization for connecing reduced iron is 95%.
It was found from above-described embodiment, the quality of DRI made from the technique provided using the utility model is high, and
Production cost is low.
To sum up, the also Primordial Qi used in the utility model aoxidized by section-reformer is made.The section
Oxidation-reformer is first aoxidized with natural gas with oxygen, then the mixed gas produced with oxidation is entered with natural gas and top gas
Row reforming reaction, prepares also Primordial Qi.The oxidation reaction of natural gas and oxygen is exothermic reaction, and obtained mixed gas is mixed for high temperature
Gas is closed, therefore, in reforming reaction, without outside heat supply, production cost is reduced.
In addition, the section oxidation-reformer is simple in construction, and in use without expensive nickel-base catalyst,
Maintenance cost is low.
In addition, top gas is when being recycled, without carrying out carbonization treatment, the equipment in system is reduced, is reduced
Production cost.
Secondly, the obtained also Primordial Qi quality height of the utility model, reducing power are strong, also CO and H in Primordial Qi2Content be higher than
85%, and also the content of Primordial Qi reclaimed water steam is less than 5%.
Finally it should be noted that：Obviously, above-described embodiment is only intended to clearly illustrate the utility model example,
And the not restriction to embodiment.For those of ordinary skill in the field, may be used also on the basis of the above description
To make other changes in different forms.There is no necessity and possibility to exhaust all the enbodiments.And thus
Among the obvious changes or variations amplified out is still in protection domain of the present utility model.
Claims (3)
1. the system that a kind of use gas base method produces DRI, it is characterised in that the system includes：
Gas-based shaft kiln, with iron ore entrance, also Primordial Qi entrance, the outlet of high temperature furnace top gas and DRI outlet；
Nonaqueous dust cleaner, is exported with high temperature furnace top gas entrance and dedusting top gas, the high temperature furnace top gas entrance and the gas
The high temperature furnace top gas outlet of base shaft furnace is connected；
Compressor, with top gas entrance and the outlet of compression top gas, the top gas entrance is removed with the nonaqueous dust cleaner
The outlet of dirt top gas is connected；
Devulcanizer, is exported with gas inlet and desulphurised natural gas；
Section oxidation-reformer, with the first desulphurised natural gas entrance, the second desulphurised natural gas entrance, oxygen intake,
Compress top gas entrance and also Primordial Qi outlet, the first desulphurised natural gas entrance and the second desulphurised natural gas entrance difference
It is connected with the desulphurised natural gas outlet of the devulcanizer, the compression top gas of compression the top gas entrance and the compressor goes out
Mouth is connected；
Section oxidation-the reformer includes partial oxidation unit and reformer, and the partial oxidation unit is located at
The lower section of the reformer, the first desulphurised natural gas entrance and the oxygen intake are arranged on the partial oxidation unit
On, the second desulphurised natural gas entrance, the compression top gas entrance and the also Primordial Qi outlet are arranged on described reform and filled
Put.
2. system according to claim 1, it is characterised in that the system also includes heat exchanger, the heat exchanger has
Dedusting top gas entrance, cryogenic natural gas entrance, the outlet of low temperature top gas and preheating gas outlet, the dedusting top gas enter
Mouth is connected with the dedusting top gas outlet of the nonaqueous dust cleaner, the low temperature top gas outlet and the top gas of the compressor
Entrance is connected, and the preheating gas outlet is connected with the gas inlet of the devulcanizer.
3. system according to claim 2, it is characterised in that the system also includes heating furnace, the heating furnace has
Fuel gas entrance, low temperature compression top gas entrance and the outlet of high temperature compressed top gas, the fuel gas entrance and the heat exchanger
The outlet of low temperature top gas be connected, the compression top gas of the low temperature compression top gas entrance and the compressor, which is exported, to be connected,
The high temperature compressed top gas outlet is connected with the compression top gas entrance of the section oxidation-reformer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201621390569.4U CN206467264U (en) | 2016-12-16 | 2016-12-16 | The system that a kind of use gas base method produces DRI |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201621390569.4U CN206467264U (en) | 2016-12-16 | 2016-12-16 | The system that a kind of use gas base method produces DRI |
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| CN206467264U true CN206467264U (en) | 2017-09-05 |
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ID=59711215
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106636518A (en) * | 2016-12-16 | 2017-05-10 | 江苏省冶金设计院有限公司 | System and method for producing direct reduction iron through gas based method |
-
2016
- 2016-12-16 CN CN201621390569.4U patent/CN206467264U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106636518A (en) * | 2016-12-16 | 2017-05-10 | 江苏省冶金设计院有限公司 | System and method for producing direct reduction iron through gas based method |
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