CN106834580A - A kind of system and method for utilization gas-based reduction reduction shaft furnace acid pellet - Google Patents
A kind of system and method for utilization gas-based reduction reduction shaft furnace acid pellet Download PDFInfo
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- CN106834580A CN106834580A CN201710124340.9A CN201710124340A CN106834580A CN 106834580 A CN106834580 A CN 106834580A CN 201710124340 A CN201710124340 A CN 201710124340A CN 106834580 A CN106834580 A CN 106834580A
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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
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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
- C21B13/0073—Selection or treatment of the reducing gases
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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
- 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]
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- Manufacture Of Iron (AREA)
Abstract
The system and method that the present invention relates to the use of gas-based reduction reduction shaft furnace acid pellet.In the system, gas-based reduction shaft furnace has also Primordial Qi entrance, hydrogen inlet, and hydrogen inlet is located at the lower section of also Primordial Qi entrance；The top gas entrance of cooling and dedusting device is connected with the top gas outlet of gas-based reduction shaft furnace；The cooling top gas entrance of hydrogen production device is carried to be connected with the cooling top gas outlet of cooling and dedusting device；The hydrogen inlet of preheating device is connected with the hydrogen outlet for carrying hydrogen production device；The preheating hydrogen inlet of heater is connected with the preheating hydrogen outlet of preheating device, and intensification hydrogen outlet is connected with the hydrogen inlet of gas-based reduction shaft furnace；The entrance of gas 2 of burner is connected with the outlet of gas 2 of heater, and also Primordial Qi outlet is connected with the also Primordial Qi entrance of gas-based reduction shaft furnace.Be sent directly into hydrogen in gas-based reduction shaft furnace acid pellet reduced by the present invention, and hydrogen inlet is located at also Primordial Qi entrance lower section, is provided with multiple, and gas and Temperature Distribution can be made more uniform.
Description
Technical field
The present invention relates to metallurgical technology field, and in particular to one kind also Primordial Qi and hydrogen each lead into gas-based reduction shaft furnace also
The system and method for former acid pellet.
Background technology
DRI, also known as sponge iron, is a kind of important Dai Tied steel scrap and better than the steelmaking feed of steel scrap, can be dilute
The impurity element components in steel scrap are released, for electric furnace steel making provides essential pure iron material.Development of iron and steel enterprises is directly gone back
Former iron technology, the requirement that the epoch that can better adapt to develop to enterprise to densification, high efficiency, purifying direction.
2014, whole world DRI yield was 74,550,000 tons.Wherein, by accounting for that gas-based shaft kiln method is produced
80%.In the prior art, there are following problems in the process for preparing sponge iron by gas-based reduction shaft furnace：1. CO gas conduct
Also Primordial Qi reduction-oxidation pelletizing when, it may occur that disproportionated reaction, produce substantial amounts of carbon dust, hinder also Primordial Qi to enter in shaft furnace, influence
The carrying out of reaction.2. cooling gas after gas-based reduction shaft furnace cooling section use, discharge gas-based reduction shaft furnace lowered the temperature, dedusting,
After pressurized treatments, it is back to use in gas-based reduction shaft furnace and is used as cooling gas again, its corollary equipment is relative complex, and after heat exchange
High-temperature cooling gas heat be wasted, be not effectively utilized.
The content of the invention
The present invention is intended to provide a kind of system and method for utilization gas-based reduction reduction shaft furnace acid pellet, will also Primordial Qi and
Hydrogen is each led into gas-based reduction shaft furnace, and gas and Temperature Distribution can be made more uniform, abundant reduction-oxidation pelletizing.
The present invention proposes a kind of system of utilization gas-based reduction reduction shaft furnace acid pellet, including gas-based reduction shaft furnace,
Cooling and dedusting device, carry hydrogen production device, preheating device, heater, burner；
The gas-based reduction shaft furnace has also Primordial Qi entrance, hydrogen inlet, acid pellet entrance, product exit, top gas
Outlet；Wherein, the hydrogen inlet is located at the lower section of the also Primordial Qi entrance；
There is the cooling and dedusting device top gas entrance, cooling top gas to export；The top gas entrance and the gas
The top gas outlet connection of base reduction shaft furnace；
The hydrogen production device that carries has cooling top gas entrance, hydrogen outlet, rich CO gas outlet；The cooling stove
Top gas entrance is connected with the cooling top gas outlet of the cooling and dedusting device；
There is the preheating device hydrogen inlet, gaseous mixture entrance, steam entry, preheating hydrogen outlet, gas 1 to go out
Mouthful.The hydrogen inlet is connected with the hydrogen outlet for carrying hydrogen production device.
There is the heater preheating hydrogen inlet, the entrance of gas 1, intensification hydrogen outlet, gas 2 to export.It is described pre-
Hot hydrogen entrance is connected with the preheating hydrogen outlet of the preheating device, the intensification hydrogen outlet and the gas-based reduction shaft furnace
Hydrogen inlet connection.
There is the burner entrance of gas 2, oxygen intake, also Primordial Qi to export.The entrance of the gas 2 and the heating
The outlet connection of gas 2 of device, also Primordial Qi outlet is connected with the also Primordial Qi entrance of the gas-based reduction shaft furnace.
Preferably, the quantity of the also Primordial Qi entrance on the gas-based reduction shaft furnace is 8~12.The gas-based reduction shaft furnace
On hydrogen inlet quantity be 8~12.
Further, decarbonization device is also included in above-mentioned system, for receiving what is discharged by the cooling and dedusting device
Cooling top gas carries out carbonization treatment；The decarbonization device is connected with the cooling and dedusting device and the hydrogen production device that carries.
Further, the cooling and dedusting device is provided with fuel gas outlet.The heater is provided with fuel gas and enters
Mouth, exhanst gas outlet.The preheating device is provided with smoke inlet.
The fuel gas outlet of the cooling and dedusting device is connected with the fuel gas entrance of the heater.The heating dress
The exhanst gas outlet put is connected with the smoke inlet of the preheating device.
Present invention also offers a kind of method that gas-based reduction reduction shaft furnace acid pellet is utilized according to said system, including
Step：
1. in acid pellet being sent into the gas-based reduction shaft furnace；
2. after the top gas of the gas-based reduction shaft furnace discharge is through dust removal process of lowering the temperature, the cooling top gas feeding institute for obtaining
State in carrying hydrogen production device, respectively obtain hydrogen and rich CO gas；
3. the hydrogen is preheated, after heating, in sending into the gas-based reduction shaft furnace via the hydrogen inlet.
4. after the rich CO gas and natural gas mix, preheated, then mixed with preheated water vapour,
Obtain gas 1.After the gas 1 is heated, gas 2 is obtained.During the gas 2 sent into the burner, and it is passed through oxygen
Gas.There is partial oxidation and pre-reforming reaction in the gas 2, obtain also Primordial Qi with the oxygen.Primordial Qi described will be gone back via institute
State and go back in the Primordial Qi entrance feeding gas-based reduction shaft furnace.
5. also Primordial Qi and the acid pellet described in the hydrogen reducing, obtain product and the top gas.
Further, the temperature of the also Primordial Qi is 850~950 DEG C.
Further, the hydrogen it is preheated, heating after temperature be 750~950 DEG C.
Further, CO and H in the top gas2Volume account for the percentage ＞ 70% of the top gas cumulative volume.
Further, the acid pellet is prepared by lateritic nickel ore, iron ore concentrate.
Further, H in the also Primordial Qi2Volume ratio with CO is：H2/ CO=1.0~3.0.
In the method for the present invention, hydrogen is sent directly into gas-based reduction shaft furnace acid pellet is reduced, reduction is anti-
Should absorb heat, can effectively using the sensible heat of hot product, the reduzate for obtaining is difficult to bond, and course of reaction is pollution-free, will not block up
Plug hydrogen inlet.
The quantity of hydrogen inlet and also Primordial Qi entrance is disposed as multiple by the present invention, can make gas therein and temperature point
Cloth is more uniform so that the reduction of acid pellet is more abundant.Also, hydrogen inlet is arranged on the lower section of also Primordial Qi entrance.
The high-temperature vapor that hydrogen reducing acid pellet process is produced can eliminate the carbon distribution of also Primordial Qi porch, it is to avoid carbon distribution is excessive
Cause air-flow not smooth.
Brief description of the drawings
Fig. 1 is system schematic of the present invention using gas-based reduction reduction shaft furnace acid pellet.
Fig. 2 is the structural representation of gas-based reduction shaft furnace in the present invention.
Fig. 3 is method flow schematic diagram of the present invention using the system reducing acid pellet shown in Fig. 1.
Reference in accompanying drawing is as follows：
1st, gas-based reduction shaft furnace；2nd, cooling and dedusting device；3rd, decarbonization device；4th, hydrogen production device is carried；5th, preheating device；6th, heat
Device；7th, burner.
Specific embodiment
Below in conjunction with drawings and Examples, specific embodiment of the invention is described in more details, so as to energy
Enough more fully understand the solution of the present invention and the advantage of its various aspects.However, specific embodiments described below and reality
It is only descriptive purpose to apply example, rather than limitation of the present invention.
Present invention firstly provides a kind of system of utilization gas-based reduction reduction shaft furnace acid pellet.The schematic diagram of the system
As shown in figure 1, including gas-based reduction shaft furnace 1, cooling and dedusting device 2, proposing hydrogen production device 4, preheating device 5, heater 6, burning
Device 7.
It is the structural representation of gas-based reduction shaft furnace 1 by Fig. 2.There is gas-based reduction shaft furnace 1 also Primordial Qi entrance, hydrogen to enter
Mouth, the outlet of acid pellet entrance, product exit, top gas.
As shown in Figure 2, hydrogen inlet is located at the lower section of also Primordial Qi entrance.In the present invention, hydrogen inlet and also Primordial Qi entrance
Quantity be set as 8~12.Inventor has found to be arranged on hydrogen inlet under also Primordial Qi entrance by lot of experiment validation
At 0.3~0.6m of side, with preferably reaction efficiency.
In the present invention, multiple hydrogen inlets can be located at the underface of also Primordial Qi entrance, also can not be in underface, can be by each
Also the angle initialization of Primordial Qi entrance and hydrogen inlet is 5 °~10 °.Because, the hydrogen being passed through in gas-based reduction shaft furnace 1 and reduction
The pressure of gas is 0.1~0.2MPa.Also, with also Primordial Qi before gas-based reduction shaft furnace 1 is passed through, gas pressure is than gas base for hydrogen
Pressure in reduction shaft furnace 1 is big, to ensure that also Primordial Qi and hydrogen smoothly can enter in gas-based reduction shaft furnace 1.Due to gas
Pressure is big, and also Primordial Qi entrance and hydrogen inlet gather on the endless tube of gas-based reduction shaft furnace 1, causes also Primordial Qi and hydrogen entering
After entering gas-based reduction shaft furnace 1, diffusion velocity is very fast.Therefore, the present invention in 8~12 hydrogen inlets and 8~12 also Primordial Qi
Entrance, it is not necessary to strict just to position up and down.In different embodiments of the invention, it is ensured that hydrogen inlet is arranged on also Primordial Qi and enters
The lower section of mouth.
Cooling and dedusting device 2 has top gas entrance, cooling top gas outlet.Wherein, top gas entrance and gas-based reduction
The top gas outlet connection of shaft furnace 1.
Carrying hydrogen production device 4 has cooling top gas entrance, hydrogen outlet, rich CO gas outlet.Wherein, cooling furnace roof
Gas entrance is connected with the cooling top gas outlet of cooling and dedusting device 2.
Preheating device 5 has hydrogen inlet, gaseous mixture entrance, steam entry, smoke inlet, preheating hydrogen outlet, gas
Body 1 is exported.Gaseous mixture entrance is used for the gaseous mixture that natural gas and rich CO gas are sent into preheating device 5.Wherein, hydrogen
Gas entrance is connected with the hydrogen outlet for carrying hydrogen production device 4.
There is heater 6 preheating hydrogen inlet, the entrance of gas 1, fuel gas entrance, intensification hydrogen outlet, gas 2 to go out
Mouth, exhanst gas outlet.Wherein, preheating hydrogen inlet is connected with the preheating hydrogen outlet of preheating device 5.Intensification hydrogen outlet and gas base
The hydrogen inlet connection of reduction shaft furnace 1.Exhanst gas outlet is connected with the smoke inlet of preheating device 5.
Burner 7 has the entrance of gas 2, oxygen intake, also Primordial Qi outlet.Wherein, the entrance of gas 2 and heater 6
Gas 2 outlet connection.Also Primordial Qi outlet is connected with the also Primordial Qi entrance of gas-based reduction shaft furnace 1.
In different embodiments of the invention, also including decarbonization device 3.Decarbonization device 3 is used for reception and is filled by cooling dedusting
The cooling top gas for putting 2 discharges carries out carbonization treatment.Also, decarbonization device 3 and cooling and dedusting device 2 and carry hydrogen production device 4 and connect
Connect.
Cooling and dedusting device 2 is provided with fuel gas outlet.The fuel gas is exported and connected with the fuel gas entrance of heater 6
Connect.
System according to Fig. 1, present invention also offers a kind of side of utilization gas-based reduction reduction shaft furnace acid pellet
Method.The schematic flow sheet of the method is shown in Fig. 3, comprises the following steps：
(1) by acid pellet feeding gas-based reduction shaft furnace 1.Acid pellet in the present invention is by lateritic nickel ore, iron ore concentrate
Prepared etc. iron content acid pellet.
(2) cooling dust removal process is carried out in the top gas feeding cooling and dedusting device 2 discharged gas-based reduction shaft furnace 1, is obtained
To cooling top gas feeding carry hydrogen production device 4, respectively obtain hydrogen and rich CO gas.
In different embodiments of the invention, the cooling top gas discharged in cooling and dedusting device 2 a, part is continued to be fed into
Carbonization treatment is carried out in decarbonization device 3, another part is used as in fuel gas feeding heater 6.Through the cooling stove of carbonization treatment
Top gas, further delivers in carrying hydrogen production device 4.In heater 6, the flue gas that fuel gas burning is produced is made in being passed through preheating device 5
It is pre- hot gas, then discharges.
In top gas of the invention, CO and H2Volume account for the percentage ＞ 70% of the top gas cumulative volume.
(3) hydrogen it is preheated, heating after, temperature be 750~950 DEG C.Then, by the hydrogen after heating via hydrogen inlet
In feeding gas-based reduction shaft furnace 1.
(4) rich CO gas and natural gas mixing, obtain mixed gas.Mixed gas and water vapour are each led into
Preheated in preheating device 5, mixed gas preheating, and mixed with preheated water vapour, obtain gas 1.Gas 1 is heated, obtains
To gas 2.During gas 2 sent into burner 7, and to being passed through oxygen in burner 7.Gas 2 is with oxygen in burner 7
Middle generation partial oxidation and pre-reforming reaction, obtain also Primordial Qi.Wherein, also the temperature of Primordial Qi is 850~950 DEG C.Then, by also
Primordial Qi is via in also Primordial Qi entrance feeding gas-based reduction shaft furnace 1.
In the also Primordial Qi that the step is obtained, CO and H2Volume account for also Primordial Qi cumulative volume percentage ＞ 90%.Also, also
H in Primordial Qi2Volume ratio with CO is：H2/ CO=1.0~3.0.
(5) also Primordial Qi and hydrogen are passed through reduction-oxidation pelletizing in gas-based reduction shaft furnace 1, obtain product and top gas.This hair
In bright, it is 0.1~0.2MPa to control the operating pressure in gas-based reduction shaft furnace 1.
In the present invention, hydrogen inlet is set as being located at the lower section of also Primordial Qi entrance.When hydrogen enters gas-based reduction shaft furnace 1
Afterwards, the acid pellet that also Primordial Qi is not reduced completely can be reduced.Meanwhile, during hydrogen reducing acid pellet, high-temperature water can be produced
Steam.High-temperature water vapor can with also Primordial Qi porch carbon distribution react, it is to avoid because carbon distribution excessively caused by also Primordial Qi blocked inlet,
Cause air-flow not smooth, the normal operation of the whole reaction of influence.
Embodiment 1
Natural gas mixes with the rich CO gas that hydrogen production device isolates are carried, into preheater preheating, and with it is preheated
Water vapour mixing, obtain gas 1.Gas 1 enters heater and heats, and obtains the gas 2 that temperature is 750 DEG C.Gas 2 enters combustion
Burn room and partial oxidation and pre-reforming reaction occur with a small amount of oxygen, obtain the also Primordial Qi that temperature is 940 DEG C.Also in Primordial Qi, H2/CO
=1.8.
Preheated by preheater from the hydrogen that hydrogen production device isolates is carried, heater heating, temperature is 750 DEG C, then via
Hydrogen inlet sends into gas-based reduction shaft furnace.
Also Primordial Qi by the also Primordial Qi entrance of 0.4m directly over hydrogen inlet into gas-based reduction shaft furnace, and with to
The acid pellet of lower motion forms convection current and is fully contacted, and reduction carburization reaction occurs, and obtains the sponge iron and stove of case-carbonizing
Top gas, and a small amount of carbon distribution may be produced in also Primordial Qi entrance.Methane also in Primordial Qi is with carbon dioxide or water vapour by sponge iron
In metal catalytic reform, generate CO and H2, being capable of reduction-oxidation pelletizing.The acid pellet reduction that hydrogen will not reduced fully,
The carbon distribution reaction of the water vapour and also Primordial Qi porch for producing is reduced, CO and H is generated2, can continue to reduce acid pellet.
There is the top gas discharged after reduction reaction in gas-based reduction shaft furnace, after dedusting of lowering the temperature, compressing, be divided into two
Point：The top gas of 60% volume carries hydrogen production device by entering after decarburization, the top gas of 40% volume as heater fuel gas.
Burnt in heater generation flue gas as after the thermal source of preheater discharge.
Hot sponge iron is directly obtained in gas-based reduction shaft furnace bottom.
Embodiment 2
The natural gas rich CO gas isolated with hydrogen production device is carried mix, into preheater preheating and pre- with warp
The water vapour mixing of heat, obtains gas 1.Gas 1 enters heater and heats, and obtains the gas 2 that temperature is 780 DEG C.Gas 2 enters
There is partial oxidation and pre-reforming reaction in combustion chamber, obtain the also Primordial Qi that temperature is 950 DEG C with a small amount of oxygen.Also in Primordial Qi, H2/
CO=1.6.
Preheated by preheater from the hydrogen that hydrogen production device isolates is carried, heater heating, temperature is 780 DEG C, then via
Hydrogen inlet sends into gas-based reduction shaft furnace.
Also Primordial Qi by the also Primordial Qi entrance of 0.5m directly over hydrogen inlet into gas-based reduction shaft furnace, and with to
The acid pellet of lower motion forms convection current and is fully contacted, and reduction carburization reaction occurs, and obtains the sponge iron and stove of case-carbonizing
Top gas, and a small amount of carbon distribution may be produced in also Primordial Qi entrance.Methane also in Primordial Qi is with carbon dioxide or water vapour by sponge iron
In metal catalytic reform, generate CO and H2, being capable of reduction-oxidation pelletizing.The acid pellet reduction that hydrogen will not reduced fully,
The carbon distribution reaction of the water vapour and also Primordial Qi porch for producing is reduced, CO and H is generated2, can continue to reduce acid pellet.
There is the top gas discharged after reduction reaction in gas-based reduction shaft furnace, after dedusting of lowering the temperature, compressing, be divided into two
Point：The top gas of 50% volume carries hydrogen production device by entering after decarburization, the top gas of 50% volume as heater fuel gas.
Burnt in heater generation flue gas as after the thermal source of preheater discharge.
Hot sponge iron is directly obtained in gas-based reduction shaft furnace bottom.
Embodiment 3
The natural gas rich CO gas isolated with hydrogen production device is carried mix, into preheater preheating and pre- with warp
The water vapour mixing of heat, obtains gas 1.Gas 1 enters heater and heats, and obtains the gas 2 that temperature is 810 DEG C.Gas 2 enters
There is partial oxidation and pre-reforming reaction in combustion chamber, obtain the also Primordial Qi that temperature is 850 DEG C with a small amount of oxygen.Also in Primordial Qi, H2/
CO=1.0.
Preheated by preheater from the hydrogen that hydrogen production device isolates is carried, heater heating, temperature is 810 DEG C, then via
Hydrogen inlet sends into gas-based reduction shaft furnace.
Also Primordial Qi by the also Primordial Qi entrance of 0.3m directly over hydrogen inlet into gas-based reduction shaft furnace, and with to
The acid pellet of lower motion forms convection current and is fully contacted, and reduction carburization reaction occurs, and obtains the sponge iron and stove of case-carbonizing
Top gas, and a small amount of carbon distribution may be produced in also Primordial Qi entrance.Methane also in Primordial Qi is with carbon dioxide or water vapour by sponge iron
In metal catalytic reform, generate CO and H2, being capable of reduction-oxidation pelletizing.The acid pellet reduction that hydrogen will not reduced fully,
The carbon distribution reaction of the water vapour and also Primordial Qi porch for producing is reduced, CO and H is generated2, can continue to reduce acid pellet.
There is the top gas discharged after reduction reaction in gas-based reduction shaft furnace, after dedusting of lowering the temperature, compressing, be divided into two
Point：The top gas of 50% volume carries hydrogen production device by entering after decarburization, the top gas of 50% volume as heater fuel gas.
Burnt in heater generation flue gas as after the thermal source of preheater discharge.
Hot sponge iron is directly obtained in gas-based reduction shaft furnace bottom.
Embodiment 4
The natural gas rich CO gas isolated with hydrogen production device is carried mix, into preheater preheating and pre- with warp
The water vapour mixing of heat, obtains gas 1.Gas 1 enters heater and heats, and obtains the gas 2 that temperature is 910 DEG C.Gas 2 enters
There is partial oxidation and pre-reforming reaction in combustion chamber, obtain the also Primordial Qi that temperature is 950 DEG C with a small amount of oxygen.Also in Primordial Qi, H2/
CO=3.0.
Preheated by preheater from the hydrogen that hydrogen production device isolates is carried, heater heating, temperature is 910 DEG C, then via
Hydrogen inlet sends into gas-based reduction shaft furnace.
Also Primordial Qi by the also Primordial Qi entrance of 0.6m directly over hydrogen inlet into gas-based reduction shaft furnace, and with to
The acid pellet of lower motion forms convection current and is fully contacted, and reduction carburization reaction occurs, and obtains the sponge iron and stove of case-carbonizing
Top gas, and a small amount of carbon distribution may be produced in also Primordial Qi entrance.Methane also in Primordial Qi is with carbon dioxide or water vapour by sponge iron
In metal catalytic reform, generate CO and H2, being capable of reduction-oxidation pelletizing.The acid pellet reduction that hydrogen will not reduced fully,
The carbon distribution reaction of the water vapour and also Primordial Qi porch for producing is reduced, CO and H is generated2, can continue to reduce acid pellet.
There is the top gas discharged after reduction reaction in gas-based reduction shaft furnace, after dedusting of lowering the temperature, compressing, be divided into two
Point：The top gas of 60% volume carries hydrogen production device by entering after decarburization, the top gas of 40% volume as heater fuel gas.
Burnt in heater generation flue gas as after the thermal source of preheater discharge.
Hot sponge iron is directly obtained in gas-based reduction shaft furnace bottom.
Acid pellet in the embodiment of the present invention is prepared by lateritic nickel ore, iron ore concentrate etc..In the various embodiments described above, Primordial Qi is gone back
The quantity of entrance and hydrogen inlet is equal, and is any integer in 8~12.
Finally it should be noted that：Obviously, above-described embodiment is only intended to clearly illustrate example of the present invention, and simultaneously
The non-restriction to implementation method.For those of ordinary skill in the field, can also do on the basis of the above description
Go out the change or variation of other multi-forms.There is no need and unable to be exhaustive to all of implementation method.And thus drawn
Obvious change that Shen goes out or among changing still in protection scope of the present invention.
Claims (10)
1. a kind of system of utilization gas-based reduction reduction shaft furnace acid pellet, it is characterised in that including gas-based reduction shaft furnace, cooling
Dust arrester, carry hydrogen production device, preheating device, heater, burner；
The gas-based reduction shaft furnace has also Primordial Qi entrance, hydrogen inlet, acid pellet entrance, product exit, top gas outlet；
Wherein, the hydrogen inlet is located at the lower section of the also Primordial Qi entrance；
There is the cooling and dedusting device top gas entrance, cooling top gas to export；The top gas entrance is with the gas base also
The top gas outlet connection of former shaft furnace；
The hydrogen production device that carries has cooling top gas entrance, hydrogen outlet, rich CO gas outlet；The cooling top gas
Entrance is connected with the cooling top gas outlet of the cooling and dedusting device；
There is the preheating device hydrogen inlet, gaseous mixture entrance, steam entry, preheating hydrogen outlet, gas 1 to export；Institute
Hydrogen inlet is stated to be connected with the hydrogen outlet for carrying hydrogen production device；
There is the heater preheating hydrogen inlet, the entrance of gas 1, intensification hydrogen outlet, gas 2 to export；The preheating hydrogen
Gas entrance is connected with the preheating hydrogen outlet of the preheating device, the hydrogen of the intensification hydrogen outlet and the gas-based reduction shaft furnace
Gas entrance is connected；
There is the burner entrance of gas 2, oxygen intake, also Primordial Qi to export；The entrance of the gas 2 and the heater
Gas 2 outlet connection, it is described also Primordial Qi outlet with the gas-based reduction shaft furnace also Primordial Qi entrance be connected.
2. system according to claim 1, it is characterised in that
The quantity of the also Primordial Qi entrance on the gas-based reduction shaft furnace is 8~12；
The quantity of the hydrogen inlet on the gas-based reduction shaft furnace is 8~12.
3. system according to claim 1, it is characterised in that also including decarbonization device；The decarbonization device and the drop
Warm dust arrester and the hydrogen production device that carries are connected.
4. system according to claim 1, it is characterised in that the cooling and dedusting device is provided with fuel gas outlet；Institute
State heater and be provided with fuel gas entrance, exhanst gas outlet；The preheating device is provided with smoke inlet；
The fuel gas outlet of the cooling and dedusting device is connected with the fuel gas entrance of the heater, the heater
Exhanst gas outlet is connected with the smoke inlet of the preheating device.
5. a kind of method that system according to one of claim 1-4 utilizes gas-based reduction reduction shaft furnace acid pellet, its
It is characterised by, including step：
During acid pellet sent into the gas-based reduction shaft furnace；
After the top gas of the gas-based reduction shaft furnace discharge is through dust removal process of lowering the temperature, hydrogen is carried described in the cooling top gas feeding for obtaining
In device, hydrogen and rich CO gas are respectively obtained；
The hydrogen is preheated, after heating, in sending into the gas-based reduction shaft furnace via the hydrogen inlet；
After the rich CO gas and natural gas mixing, preheated, then mixed with preheated water vapour, obtained gas
Body 1, after the gas 1 is heated, obtains gas 2；During the gas 2 sent into the burner, and oxygen is passed through, it is described
There is partial oxidation and pre-reforming reaction in gas 2, obtain also Primordial Qi with the oxygen, by the also Primordial Qi via the also Primordial Qi
Entrance is sent into the gas-based reduction shaft furnace；
Also Primordial Qi and the acid pellet described in the hydrogen reducing, obtain product and the top gas.
6. method according to claim 5, it is characterised in that the temperature of the also Primordial Qi is 850~950 DEG C.
7. method according to claim 5, it is characterised in that the hydrogen is preheated, the temperature after heating for 750~
950℃。
8. method according to claim 5, it is characterised in that CO and H in the top gas2Volume account for the top gas
The percentage ＞ 70% of cumulative volume.
9. method according to claim 5, it is characterised in that the acid pellet is prepared by lateritic nickel ore, iron ore concentrate.
10. method according to claim 5, it is characterised in that H in the also Primordial Qi2Volume ratio with CO is：H2/ CO=
1.0~3.0.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102304599A (en) * | 2011-09-22 | 2012-01-04 | 中冶赛迪上海工程技术有限公司 | Method and device for producing direct reduced iron by using gas-based reduction shaft furnace |
| CN104087699A (en) * | 2014-07-18 | 2014-10-08 | 北京神雾环境能源科技集团股份有限公司 | Method and system for preparing sponge iron by using gas-based shaft furnace |
| CN204039428U (en) * | 2014-07-18 | 2014-12-24 | 北京神雾环境能源科技集团股份有限公司 | Gas-based shaft kiln prepares the system of sponge iron |
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| CN105671228A (en) * | 2016-02-29 | 2016-06-15 | 北京神雾环境能源科技集团股份有限公司 | Oxygen blast furnace and gas base shaft furnace combined production system and method |
| CN105734190A (en) * | 2016-02-29 | 2016-07-06 | 北京神雾环境能源科技集团股份有限公司 | Oxygen blast furnace and gas-based shaft kiln combination production system and combination production method |
| CN206607249U (en) * | 2017-03-03 | 2017-11-03 | 江苏省冶金设计院有限公司 | A kind of system of utilization gas-based reduction reduction shaft furnace acid pellet |
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2017
- 2017-03-03 CN CN201710124340.9A patent/CN106834580A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102304599A (en) * | 2011-09-22 | 2012-01-04 | 中冶赛迪上海工程技术有限公司 | Method and device for producing direct reduced iron by using gas-based reduction shaft furnace |
| CN104087699A (en) * | 2014-07-18 | 2014-10-08 | 北京神雾环境能源科技集团股份有限公司 | Method and system for preparing sponge iron by using gas-based shaft furnace |
| CN204039428U (en) * | 2014-07-18 | 2014-12-24 | 北京神雾环境能源科技集团股份有限公司 | Gas-based shaft kiln prepares the system of sponge iron |
| CN104293998A (en) * | 2014-07-18 | 2015-01-21 | 北京神雾环境能源科技集团股份有限公司 | Method and system of preparing spongy iron by using gas-based shaft furnace |
| CN105671228A (en) * | 2016-02-29 | 2016-06-15 | 北京神雾环境能源科技集团股份有限公司 | Oxygen blast furnace and gas base shaft furnace combined production system and method |
| CN105734190A (en) * | 2016-02-29 | 2016-07-06 | 北京神雾环境能源科技集团股份有限公司 | Oxygen blast furnace and gas-based shaft kiln combination production system and combination production method |
| CN206607249U (en) * | 2017-03-03 | 2017-11-03 | 江苏省冶金设计院有限公司 | A kind of system of utilization gas-based reduction reduction shaft furnace acid pellet |
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