CN107177710A - DRI, building materials, the system and method for Coal (syngas) polygeneration - Google Patents
DRI, building materials, the system and method for Coal (syngas) polygeneration Download PDFInfo
- Publication number
- CN107177710A CN107177710A CN201710448359.9A CN201710448359A CN107177710A CN 107177710 A CN107177710 A CN 107177710A CN 201710448359 A CN201710448359 A CN 201710448359A CN 107177710 A CN107177710 A CN 107177710A
- Authority
- CN
- China
- Prior art keywords
- gas
- coal
- coal gas
- outlet
- dust
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/04—Making spongy iron or liquid steel, by direct processes in retorts
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/14—Waste materials; Refuse from metallurgical processes
- C04B18/141—Slags
- C04B18/142—Steelmaking slags, converter slags
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/0006—Making spongy iron or liquid steel, by direct processes obtaining iron or steel in a molten state
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/14—Multi-stage processes processes carried out in different vessels or furnaces
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Metallurgy (AREA)
- Ceramic Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention discloses DRI, building materials, Coal (syngas) polygeneration system and method, system includes：Reaction tower, inside limit gasification section, reduction section and molten segmentation successively from top to bottom, gasification section has the first impinging stream nozzle of supply oxygen and coal dust, reduction section has pre-reduced iron miberal powder entrance, there is taper necking between reduction section and molten segmentation, there is the first gas exit on the reaction tower of taper necking side-walls, molten segmentation has the outlet of slag liquid and molten iron outlet；Coal gas quenching column, there is gas exit and dust outlet after the first gas entry, cooled coal gas entrance, heat exchange；Prereduction tower, the second impinging stream nozzle, the second gas exit and pre-reduced iron the miberal powder outlet for having supply Iron Ore Powder and coal gas, the second impinging stream nozzle is connected with gas exit after heat exchange.The system can realize production coal gas and molten iron simultaneously, and gained molten iron founding or can further refine special steel, and the slag liquid of gained can be used for production building and ornament materials, and whole production efficiency is high, cost is low and environmental protection.
Description
Technical field
The invention belongs to field of metallurgy, specifically, the present invention relates to DRI, building materials, Coal (syngas) polygeneration
System and method.
Background technology
Direct reduction iron making is the basis that steel produces short route, is using mill coal as main energy sources, in the soft of iron ore
Change the method that reduction obtains solid metallic iron that carried out below temperature.Due to the pollution of harmful components can be avoided in production process,
The chemical composition of its product DRI (DRI) is more pure, is steel scrap substitute important during steel is produced, and is to solve to give up
The important channel of steel inadequate resource, is the diluent of steel scrap relict element, is that electric furnace smelting high-quality clean steel, high-quality steel can not
Or the raw material of the control relict element lacked, it is former material necessary to equipment manufacture production oil, synthesis chemical industry, nuclear facilities etc.
Material, is the best cooling agent of pneumatic steelmaking.Therefore, global electric furnace steel mill will continue to increase to the demand of DRI.
Modern coal gasification course is that, using coal as raw material, pure oxygen and vapor etc. are gasifying agent, under 1500 degree celsius temperatures
Reaction generation active principle (CO+H2) it is more than 90% synthesis gas, slag flow to gasification furnace Quench section by water Quench in liquid form
It is cured as granular discharge.Coal gasification is the key technology of coal chemical industry, is current fuel oil from coal, coal fuel gas, coal inhibition and generation
The basis of the techniques such as product.Gasification is also that the larger, energy consumption of coal chemical industry process investment is higher, process conditions are harsh and material requirements is higher
Workshop section.
Therefore, it is badly in need of finding the technique that a kind of cost is low, technique simply produces DRI and coal gas.
The content of the invention
It is contemplated that at least solving one of technical problem in correlation technique to a certain extent.Therefore, the present invention
One purpose is to propose a kind of DRI, building materials, the system and method for Coal (syngas) polygeneration.The system can be realized simultaneously
Produce coal gas and molten iron, gained molten iron founding or can further refine special steel, and the slag liquid of gained can be used for production building dress
Exterior material, whole production efficiency is high, cost is low and environmental protection.
In one aspect of the invention, the present invention proposes a kind of DRI, building materials, Coal (syngas) polygeneration and is
System, embodiments in accordance with the present invention, system includes：
Limit gasification section, reduction section and molten segmentation, the gasification section in reaction tower, the reaction tower successively from top to bottom
The first impinging stream nozzle of supply oxygen and coal dust is disposed with, the reduction section is disposed with pre-reduced iron miberal powder entrance, described to go back
It is disposed between former section and the molten segmentation on taper necking, the reaction tower of the taper necking side-walls and is disposed with first
Gas exit, the molten step-by-step arrangement has the outlet of slag liquid and molten iron outlet；
Coal gas quenching column, the coal gas quenching column have the first gas entry, cooled coal gas entrance, heat exchange after gas exit and
Dust outlet, first gas entry is connected with first gas exit；
Prereduction tower, the second impinging stream nozzle, the second coal gas that the prereduction tower has supply Iron Ore Powder and coal gas goes out
Mouth and the outlet of pre-reduced iron miberal powder, second impinging stream nozzle are connected with gas exit after the heat exchange, the pre-reduced iron
Miberal powder outlet is connected with the pre-reduced iron miberal powder entrance.
DRI according to embodiments of the present invention, building materials, the system of Coal (syngas) polygeneration, by gasifying in reaction tower
Duan Caiyong impinging stream nozzles hit coal dust with oxygen to realize that coal dust and the quick of oxygen are mixed at a certain angle, accelerate coal dust
With the reaction speed of oxygen, while formed piston flow reactor form, to reduce flow field back-mixing, and by being reduced in reaction tower
Section sprays into pre-reduced iron miberal powder, is remarkably improved the reduction degree of Iron Ore Powder, and the coal gas of high temperature produced using gasification section is aobvious
Heat is further reduced to pre-reduced iron miberal powder, while the temperature of the first coal gas is reduced, it is energy-saving, reduce coal gas cooling
The yield of waste water, while arranging taper necking between reduction section and fusing section, and is arranged in cone by the first gas exit
On the reaction tower of shape necking side-walls, the Dust Capacity in the first coal gas can be substantially reduced, and set in the bottom of reaction tower
Molten segmentation, the reduzate that reduction section is obtained enters molten point that slag iron is realized in molten segmentation under gravity, and then realizes molten iron
With the follow-up recycling of slag liquid, molten iron founding or can further refine special steel, and slag liquid can be used for production building material product, by the
One coal gas is supplied into prereduction tower before reduced iron miberal powder, carries out Quench heat exchange to the first coal gas using cooled coal gas in advance, by
This can further reduce the dust content in coal gas after heat exchange, improve the reproducibility of coal gas after heat exchange, and then improve Iron Ore Powder
Prereduction rate, while the temperature of coal gas after heat exchange can be reduced, it is to avoid Iron Ore Powder bond vitrified is in prereduction tower, next Iron Ore Powder
Before reaction tower is entered, prereduction tower is introduced into advance and carries out pre-reduction treatment, on the one hand can further utilize coal gas after heat exchange
Sensible heat, improve whole system efficiency of utilization, the percent reduction in reaction tower is on the other hand remarkably improved, in addition, pre-
Reduce in tower, use impinging stream nozzle to hit coal gas after Iron Ore Powder and heat exchange at a certain angle to realize after Iron Ore Powder and heat exchange
The quick mixing of coal gas, accelerates Iron Ore Powder and the reaction speed of coal gas after heat exchange, shortens the reaction time, while reducing reactor body
Product, reduces system investments.
In addition, the system of DRI according to the above embodiment of the present invention, building materials, Coal (syngas) polygeneration can also have
There is technical characteristic additional as follows：
In some embodiments of the invention, said system further comprises：Cyclone separator, the cyclonic separation utensil
There are gas outlet and particle outlet after gaseous mixture entrance, dedusting, the gaseous mixture entrance is connected with second gas exit；Ceramics
Filter, gas is exported after the ceramic filter has gas entrance after dedusting, dust granules outlet and filtered, gas after the dedusting
Entrance is connected with gas outlet after the dedusting；Scrubber, the scrubber have filtering after gas entrance, water inlet and
Gas is exported after washing, and gas entrance is connected with gas outlet after the filtering after the filtering；Gas purification tower, the gas purification tower
With gas entrance after washing and purification gas exit, gas entrance is connected with gas outlet after the washing after the washing.Thus, lead to
The second coal gas for obtaining prereduction tower is crossed to supply successively to cyclone separator and ceramic filter with further the second coal of removing
Solid content in dust in gas, the second coal gas of reduction, and then reduce at the water consumption of scrubber, the waste water for reducing system
Reason amount.
In some embodiments of the invention, in the dust outlet, the particle outlet and dust granules outlet
At least one of be connected with the pre-reduced iron miberal powder entrance.Thus, the recovery utilization rate of Iron Ore Powder, Jin Erti can be dramatically increased
The content of molten iron in high reaction tower.
In some embodiments of the invention, the purification gas exit hits with the cooled coal gas entrance, described second
At least one of flow nozzle and described pre-reduced iron miberal powder entrance are connected.Thus, it is remarkably improved the production effect of whole system
Rate.
In some embodiments of the invention, the system further comprises：High temperature casting apparatus, the high temperature founding dress
Put and be connected with slag liquid outlet.Thus, it is possible to increase economic efficiency.
In another aspect of the invention, the present invention propose it is a kind of using said system implement DRI, building materials,
The method of Coal (syngas) polygeneration, embodiments in accordance with the present invention, this method includes：
(1) oxygen and coal dust are supplied to the gasification section of the reaction tower through first impinging stream nozzle, by prereduction
Iron Ore Powder is supplied to the reduction section of the reaction tower so that gasified, reduced and melted point reaction in reaction tower, to obtain the
One coal gas, slag liquid and molten iron；
(2) first coal gas is supplied into the coal gas quenching column and exchanged heat with cooled coal gas, to be exchanged heat
Coal gas and dust afterwards；
(3) coal gas after Iron Ore Powder and heat exchange is supplied to the prereduction tower through second impinging stream nozzle and carried out in advance also
Original place is managed, and to obtain pre-reduced iron miberal powder and the second coal gas, and the pre-reduced iron miberal powder is supplied into the institute into step (1)
State reaction tower.
DRI according to embodiments of the present invention, building materials, the system of Coal (syngas) polygeneration, by gasifying in reaction tower
Duan Caiyong impinging stream nozzles hit coal dust with oxygen to realize that coal dust and the quick of oxygen are mixed at a certain angle, accelerate coal dust
With the reaction speed of oxygen, while formed piston flow reactor form, to reduce flow field back-mixing, and by being reduced in reaction tower
Section sprays into pre-reduced iron miberal powder, is remarkably improved the reduction degree of Iron Ore Powder, and the coal gas of high temperature produced using gasification section is aobvious
Heat is further reduced to pre-reduced iron miberal powder, while the temperature of the first coal gas is reduced, it is energy-saving, reduce coal gas cooling
The yield of waste water, while arranging taper necking between reduction section and fusing section, and is arranged in cone by the first gas exit
On the reaction tower of shape necking side-walls, the Dust Capacity in the first coal gas can be substantially reduced, and set in the bottom of reaction tower
Molten segmentation, the reduzate that reduction section is obtained enters molten point that slag iron is realized in molten segmentation under gravity, and then realizes molten iron
With the follow-up recycling of slag liquid, molten iron founding or can further refine special steel, and slag liquid can be used for production building material product, by the
One coal gas is supplied into prereduction tower before reduced iron miberal powder, carries out Quench heat exchange to the first coal gas using cooled coal gas in advance, by
This can further reduce the dust content in coal gas after heat exchange, improve the reproducibility of coal gas after heat exchange, and then improve Iron Ore Powder
Prereduction rate, while the temperature of coal gas after heat exchange can be reduced, it is to avoid Iron Ore Powder bond vitrified is in prereduction tower, next Iron Ore Powder
Before reaction tower is entered, prereduction tower is introduced into advance and carries out pre-reduction treatment, on the one hand can further utilize coal gas after heat exchange
Sensible heat, improve whole system efficiency of utilization, the percent reduction in reaction tower is on the other hand remarkably improved, in addition, pre-
Reduce in tower, use impinging stream nozzle to hit coal gas after Iron Ore Powder and heat exchange at a certain angle to realize after Iron Ore Powder and heat exchange
The quick mixing of coal gas, accelerates Iron Ore Powder and the reaction speed of coal gas after heat exchange, shortens the reaction time, while reducing reactor body
Product, reduces system investments.
In addition, the method for DRI according to the above embodiment of the present invention, building materials, Coal (syngas) polygeneration can also have
There is technical characteristic additional as follows：
In some embodiments of the invention, the above method further comprises：(4) by obtained in step (3) described
Two coal gas, which are supplied, carries out separating treatment into the cyclone separator, to obtain gas and particle after dedusting；(5) by the dedusting
Gas, which is supplied, afterwards carries out filtration treatment into the ceramic filter, to obtain gas after dust granules and filtering；(6) by the mistake
Gas is supplied after filter contacts progress carrying out washing treatment into the scrubber with water, so as to gas after being washed；(7) by the water
Gas, which is supplied, after washing carries out purified treatment into the gas purification tower, to be purified coal gas.Thus, by by prereduction tower
The second obtained coal gas is supplied to cyclone separator and ceramic filter further to remove the dust in the second coal gas successively, is dropped
Solid content in low second coal gas, and then the water consumption of scrubber is reduced, reduce the wastewater treatment capacity of technique.
In some embodiments of the invention, the method for above-mentioned processing Iron Ore Powder further comprises：(8) step (2) is obtained
To dust, the supply of at least one of obtained dust granules of the obtained particle of step (4) and step (5) is into step (1)
The reaction tower.Thus, the recovery utilization rate of Iron Ore Powder can be dramatically increased, and then improves the content of molten iron in reaction tower.
In some embodiments of the invention, the above method further comprises：(9) purification for obtaining step (7)
Coal gas supply the coal gas quenching column into step (2), in second impinging stream nozzle in step (3) at least it
One.Thus, it is remarkably improved the production efficiency of whole technique.
In some embodiments of the invention, the above method further comprises：(10) the slag liquid for obtaining step (1)
Supply prepares building material product into the high temperature casting apparatus.Thus, it is possible to increase economic efficiency.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Brief description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become from description of the accompanying drawings below to embodiment is combined
Substantially and be readily appreciated that, wherein：
Fig. 1 is DRI according to an embodiment of the invention, building materials, the system schematic of Coal (syngas) polygeneration；
Fig. 2 is shown according to the system architecture of the DRI, building materials, Coal (syngas) polygeneration of further embodiment of the present invention
It is intended to；
Fig. 3 is shown according to the system architecture of the DRI, building materials, Coal (syngas) polygeneration of another embodiment of the invention
It is intended to；
Fig. 4 is shown according to the system architecture of the DRI, building materials, Coal (syngas) polygeneration of another embodiment of the invention
It is intended to；
Fig. 5 is shown according to the system architecture of the DRI, building materials, Coal (syngas) polygeneration of another embodiment of the invention
It is intended to；
Fig. 6 is DRI according to an embodiment of the invention, building materials, the method flow signal of Coal (syngas) polygeneration
Figure；
Fig. 7 is shown according to the method flow of the DRI, building materials, Coal (syngas) polygeneration of further embodiment of the present invention
It is intended to；
Fig. 8 is shown according to the method flow of the DRI, building materials, Coal (syngas) polygeneration of another embodiment of the invention
It is intended to；
Fig. 9 is shown according to the method flow of the DRI, building materials, Coal (syngas) polygeneration of another embodiment of the invention
It is intended to；
Figure 10 is the method flow of the DRI, building materials, Coal (syngas) polygeneration according to another embodiment of the invention
Schematic diagram.
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and be not considered as limiting the invention.
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer ", " up time
The orientation or position relationship of the instruction such as pin ", " counterclockwise ", " axial direction ", " radial direction ", " circumference " be based on orientation shown in the drawings or
Position relationship, is for only for ease of the description present invention and simplifies description, rather than indicate or imply that the device or element of meaning must
There must be specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or implying relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or
Implicitly include at least one this feature.In the description of the invention, " multiple " are meant that at least two, such as two, three
It is individual etc., unless otherwise specifically defined.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally；Can be that machinery connects
Connect or electrically connect；Can be joined directly together, can also be indirectly connected to by intermediary, can be in two elements
The connection in portion or the interaction relationship of two elements, unless otherwise clear and definite restriction.For one of ordinary skill in the art
For, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.
In one aspect of the invention, the present invention proposes a kind of system for handling Iron Ore Powder, according to the implementation of the present invention
Example, with reference to Fig. 1, the system includes：Reaction tower 100, coal gas quenching column 200 and prereduction tower 300.
Limit gasification section 11, reduction section 12 in embodiments in accordance with the present invention, reaction tower 100 successively from top to bottom and melt
Segmentation 13.Specifically, gasification section, reduction section and molten segmentation are cylindric, and gasification section and reduction section use water-cooling wall knot
Structure or structure of refractory, molten bath section use structure of refractory.
According to one embodiment of present invention, gasification section 11 is disposed with the first impinging stream nozzle of supply oxygen and coal dust
101, so that coal dust and oxygen enter gasification section after being sufficiently mixed produce the also Primordial Qi containing carbon monoxide.Invention human hair
It is existing, by using impinging stream nozzle to hit coal dust and oxygen to realize coal dust and oxygen at a certain angle in reaction tower gasification section
Quick mixing, the reaction speed of coal dust and oxygen can be accelerated, at the same formed piston flow reactor form, returned with reducing flow field
It is mixed, so as to be remarkably improved the reduction degree of Iron Ore Powder.Specifically, the first impinging stream nozzle is arranged in the top of gasification section.
According to still a further embodiment, reduction section 12 is disposed with pre-reduced iron miberal powder entrance 102, specifically, in advance
Reduced iron miberal powder porch can be disposed with nozzle, i.e., pre-reduced iron miberal powder is injected into reduction section so that be produced with gasification section
The also Primordial Qi containing carbon monoxide and hydrogen fully contact, so as to improve the reduction degree of pre-reduced iron miberal powder.
According to still another embodiment of the invention, taper necking 103, taper are disposed between reduction section 12 and molten segmentation 13
The first gas exit 104 is disposed with the reaction tower 100 of the side-walls of necking 103.Specifically, reduzate and coal gas are together through cone
Shape necking enters molten segmentation, and reduzate carries out molten office reason, and coal gas is discharged from the first gas exit.Thus, it is possible to significantly
Reduce Dust Capacity in the first coal gas.
According to still another embodiment of the invention, melt segmentation 13 and be disposed with slag liquid outlet 105 and molten iron outlet 106, and it is suitable
Molten office reason is carried out in the reduzate for obtaining reduction section, to obtain the first coal gas, slag liquid and molten iron.Specifically, utilizing
Carbon monoxide and hydrogen cumulative volume content that reaction tower gasification section is produced are 80-90% reducing atmosphere, by it is levigate it is pre- also
The reduction section (laminar flow section) that former Iron Ore Powder is delivered to reaction tower by Geldart-D particle (cooled coal gas is used as carrier gas) or machinery utilizes coal
The sensible heat and its reproducibility of gas are further reduced, and obtained pure iron and slag melts at high temperature, is come downwards to instead by gravity
Ying Tarong is segmented, and carries out molten point of molten iron and slag liquid.
Inventor has found, by reaction tower gasification section using impinging stream nozzle principle by coal dust and oxygen at a certain angle
Hit to realize the quick mixing of coal dust and oxygen, accelerate the reaction speed of coal dust and oxygen, while forming piston flow reactor
Form, to reduce flow field back-mixing, by being passed through pre-reduced iron miberal powder in reaction tower reduction section, is remarkably improved the reduction of Iron Ore Powder
Spend, and the sensible heat of the coal gas of high temperature produced using gasification section is further reduced to pre-reduced iron miberal powder, is reduced simultaneously
The temperature of first coal gas, it is energy-saving, reduce the yield of coal gas cooling waste water.Tapered contracting is provided with the first gas exit
Mouthful, the Dust Capacity in the first coal gas can be substantially reduced.Molten segmentation is set in the bottom of reaction tower, realize slag iron molten point, and then
Realize the follow-up recycling of molten iron and slag liquid, molten iron founding or can further refine special steel.
According to one embodiment of present invention, the particle diameter of coal dust is not particularly restricted, and those skilled in the art can be with
Selected according to actual needs, according to the specific embodiment of the present invention, the particle diameter of coal dust can be 10-90 microns of accountings
More than 90%.Inventor has found that the coal dust of the particle size range has preferable gasification efficiency, so as to obtain carbon monoxide and hydrogen
The high also Primordial Qi of content, and then improve the reduction efficiency of pre-reduced iron miberal powder.
According to still a further embodiment, the water content of coal dust is not particularly restricted, those skilled in the art
It can be selected according to actual needs, according to the specific embodiment of the present invention, the water content of coal dust can be less than
2wt%.Thus, it is possible to further improve the reduction efficiency of pre-reduced iron miberal powder.
According to still another embodiment of the invention, the particular type of coal dust is not particularly restricted, those skilled in the art
Member can be selected according to actual needs, and according to the specific embodiment of the present invention, coal dust can be the god selected from northern Shensi
At least one of the weakly caking coal and free-burning coal on the ground such as mansion coal, Datong coal.
According to still another embodiment of the invention, the condition of gasification section gasification is not particularly restricted, the technology of this area
Personnel can be selected according to actual needs, and according to the specific embodiment of the present invention, the temperature of gasification can be 1800-
2000 degrees Celsius, the residence time can be found for 1~5 second inventor, and other conditions can be significantly better than under the conditions of being somebody's turn to do and improve coal
The gasification efficiency of powder, so as to further improve the reduction efficiency of pre-reduced iron miberal powder.
According to still another embodiment of the invention, coal dust is not limited especially with oxygen, the mass ratio of pre-reduced iron miberal powder
System, those skilled in the art can be selected according to actual needs, according to the specific embodiment of the present invention, coal dust with
Oxygen ratio is (450~650) kg/ (300~420) m3, pre-reduced iron miberal powder and coal gas mass ratio can be ((0.5~2) t/
1000m3.Inventor has found that coal dust is with oxygen than suitable, effective gas CO+H in coal gas2Content is high, and efficiency of carbon con version is high, is conducive to iron
Miberal powder is reduced to be reduced with coal gas later use, coal/oxygen ratio, CO in coal gas2Gas content increase, reduces the reduction potential of coal gas, no
Beneficial to reduction of iron ore fines.Coal/oxygen is accordingly raised than reduction, reacting furnace temperature, and resistance to material, which corrodes, to be aggravated, but is conducive to molten point of slag iron.
And use the mixed proportion of the application to be conducive to molten point of slag iron while reduction efficiency is improved.
Embodiments in accordance with the present invention, coal gas quenching column 200 has the first gas entry 201, cooled coal gas entrance 202, changed
Gas exit 203 and dust outlet 204 after heat, the first gas entry 201 are connected with the first gas exit 104, and suitable for by the
One coal gas is exchanged heat with cooled coal gas, so as to coal gas and dust after being exchanged heat.Inventor find, by the first coal gas supply to
Before prereduction tower reduced iron miberal powder, Quench heat exchange is carried out to the first coal gas using cooled coal gas in advance, thus can further be reduced
Dust content after heat exchange in coal gas, while being stripped of H2O and CO2, so as to improve the reproducibility of coal gas after heat exchange, and then improve
The prereduction rate of Iron Ore Powder, while the temperature of coal gas after heat exchange can be reduced, it is to avoid Iron Ore Powder bond vitrified is in prereduction tower.Need
It is noted that the structure of coal gas quenching column is not particularly restricted, those skilled in the art can enter according to actual needs
Row selection, for example, can be upright hollow columnar structures, and Ta Nei can use water wall structure, and cooled coal gas entrance can be arranged on coal
In the bottom sidewall of gas quenching column, gas exit can be arranged on the top of coal gas quenching column after heat exchange.
According to one embodiment of present invention, the mixed volume ratio of cooled coal gas and the first coal gas is not particularly restricted, this
The technical staff in field can be selected according to actual needs, according to the specific embodiment of the present invention, cooled coal gas and the
The mixed volume ratio of one coal gas can be 0.5~0.7：1.Inventor has found that cooled coal gas, than high, enters with the first coal gas mixed volume
The gas temperature for entering prereduction tower is low, and it is powder pre-reduced to be unfavorable for iron ore, but the two ratio is too low can cause to enter prereduction coal gas
Temperature is too high and causes Iron Ore Powder to soften.Thus, it can ensure that the powder pre-reduced rate of iron ore is high using the mixed proportion of the application
While avoid the softening of Iron Ore Powder.
According to still a further embodiment, the temperature of coal gas is not particularly restricted after cooling, the technology of this area
Personnel can be selected according to actual needs, according to the specific embodiment of the present invention, and the temperature of coal gas can be with after cooling
No more than 1000 degrees Celsius.
Embodiments in accordance with the present invention, prereduction tower 300 has the second impinging stream nozzle of supply Iron Ore Powder and coal gas
301st, the second gas exit 302 and pre-reduced iron miberal powder outlet 303, the second impinging stream nozzle 301 and gas exit 203 after heat exchange
It is connected, pre-reduced iron miberal powder outlet 303 is connected (centre there should be Geldart-D particle facility) with pre-reduced iron miberal powder entrance 102, and suitable
Coal gas carries out pre-reduction treatment after by Iron Ore Powder and heat exchange, to obtain pre-reduced iron miberal powder and the second coal gas, and will go back in advance
Former Iron Ore Powder is supplied into reaction tower.Inventor has found that Iron Ore Powder is introduced into the progress of prereduction tower in advance before reaction tower is entered
Pre-reduction treatment, on the one hand can improve the efficiency of utilization of whole system, the opposing party further using the sensible heat of coal gas after heat exchange
Face is remarkably improved the reduction efficiency in reaction tower and the degree of metalization of Iron Ore Powder.In prereduction tower, using impinging stream nozzle
Coal gas after Iron Ore Powder and heat exchange is hit to realize the quick mixing of coal gas after Iron Ore Powder and heat exchange at a certain angle, accelerates iron ore
The reaction speed of powder and coal gas after heat exchange, shortens the reaction time, while reducing reactor volume, reduces system investments.Need
Bright, the structure of prereduction tower is not particularly restricted, and those skilled in the art can be selected according to actual needs, example
It such as can be hollow cylindrical；Second impinging stream nozzle can be arranged on the top of prereduction tower, and the second gas exit can be set
Put on prereduction tower lower sides, the outlet of pre-reduced iron miberal powder can be arranged on the bottom of prereduction tower.
According to one embodiment of present invention, the granularity of Iron Ore Powder is not particularly restricted, and those skilled in the art can
To be selected according to actual needs, according to the specific embodiment of the present invention, the granularity of Iron Ore Powder can be 10~90 μm.
Inventor has found that iron ore Powder Particle Size, which reduces, is conducive to gas-solid reaction, accelerates reduction of iron ore fines, is conducive to Geldart-D particle；But granularity
Further reduce gas solid separation difficult, dust content height in coal gas aggravates follow-up gas purification investment.Thus, using the application
Granularity Iron Ore Powder can improve reduction of iron ore fines rate while reduce cost of investment.
According to still a further embodiment, the particular type of Iron Ore Powder is not particularly restricted, the technology of this area
Personnel can be selected according to actual needs, according to the specific embodiment of the present invention, and Iron Ore Powder can be big selected from Australia
At least one of Leah imported iron ore fines, Brazilian imported iron ore, Anshan, liaoning Province iron ore, Hebei Qian'an iron ore.
According to still another embodiment of the invention, Iron Ore Powder and the mixing quality ratio of coal gas after cooling are not limited especially
System, those skilled in the art can be selected according to actual needs, according to the specific embodiment of the present invention, Iron Ore Powder
Mixing ratio with coal gas after cooling can be 0.5t：1000m3.Inventor has found, if when Iron Ore Powder and high coal gas ratio, reducing
Temperature can be reduced, and reduce reduction of iron ore fines speed, and gas-solid dispersion effect is not good, or even reduction tolerance is not enough, and Iron Ore Powder is with going back
It is former insufficient, aggravate final reduction reactor load.
DRI according to embodiments of the present invention, building materials, the system of Coal (syngas) polygeneration, by gasifying in reaction tower
Duan Caiyong impinging stream nozzles hit coal dust with oxygen to realize that coal dust and the quick of oxygen are mixed at a certain angle, accelerate coal dust
With the reaction speed of oxygen, while formed piston flow reactor form, to reduce flow field back-mixing, and by being reduced in reaction tower
Section sprays into pre-reduced iron miberal powder, is remarkably improved the reduction degree of Iron Ore Powder, and the coal gas of high temperature produced using gasification section is aobvious
Heat is further reduced to pre-reduced iron miberal powder, while the temperature of the first coal gas is reduced, it is energy-saving, reduce coal gas cooling
The yield of waste water, while arranging taper necking between reduction section and fusing section, and is arranged in cone by the first gas exit
On the reaction tower of shape necking side-walls, the Dust Capacity in the first coal gas can be substantially reduced, and set in the bottom of reaction tower
Molten segmentation, the reduzate that reduction section is obtained enters molten point that slag iron is realized in molten segmentation under gravity, and then realizes molten iron
With the follow-up recycling of slag liquid, molten iron founding or can further refine special steel, and slag liquid can be used for production building material product, by the
One coal gas is supplied into prereduction tower before reduced iron miberal powder, carries out Quench heat exchange to the first coal gas using cooled coal gas in advance, by
This can further reduce the dust content in coal gas after heat exchange, improve the reproducibility of coal gas after heat exchange, and then improve Iron Ore Powder
Prereduction rate, while the temperature of coal gas after heat exchange can be reduced, it is to avoid Iron Ore Powder bond vitrified is in prereduction tower, next Iron Ore Powder
Before reaction tower is entered, prereduction tower is introduced into advance and carries out pre-reduction treatment, on the one hand can further utilize coal gas after heat exchange
Sensible heat, improve whole system efficiency of utilization, the percent reduction in reaction tower is on the other hand remarkably improved, in addition, pre-
Reduce in tower, use impinging stream nozzle to hit coal gas after Iron Ore Powder and heat exchange at a certain angle to realize after Iron Ore Powder and heat exchange
The quick mixing of coal gas, accelerates Iron Ore Powder and the reaction speed of coal gas after heat exchange, shortens the reaction time, while reducing reactor body
Product, reduces system investments.
Embodiments in accordance with the present invention, with reference to Fig. 2, above-mentioned DRI, building materials, the system of Coal (syngas) polygeneration enter one
Step includes：Cyclone separator 400, ceramic filter 500, scrubber 600 and gas purification tower 700.
Embodiments in accordance with the present invention, cyclone separator 400 have gaseous mixture entrance 401, dedusting after gas outlet 402 and
Grain outlet 403, gaseous mixture entrance 401 is connected with the second gas exit 302, and the second coal gas suitable for will be obtained in prereduction tower
Separating treatment is carried out, to obtain gas and particle after dedusting.Inventor has found, is supplied by the second coal gas for obtaining prereduction tower
The dust in the second coal gas can be removed to cyclone separator, can be reduced after the solid content in the second coal gas, and then reduction
The water consumption of continuous scrubber, reduces the wastewater treatment capacity of system.It should be noted that the series of cyclone separator not by
Especially limitation, those skilled in the art can be selected according to actual needs, for example, can be two-stage string with reference to Fig. 2
Connection.
There are embodiments in accordance with the present invention, ceramic filter 500 gas entrance 501, dust granules after dedusting to export 502 and
Gas outlet 503 after filtering, gas entrance 501 is connected with gas outlet 402 after dedusting after dedusting, and suitable for gas after dedusting is filtered
Processing, to obtain gas after dust granules and filtering.Inventor has found, is supplied by gas after the dedusting that obtains cyclone separator
The dust after dedusting in gas can be further removed to ceramic filter, the solid content in gas after dedusting is reduced, and then further
The water consumption of scrubber is reduced, the wastewater treatment capacity of system is reduced.
Embodiments in accordance with the present invention, scrubber 600 has after gas entrance 601 after filtering, water inlet 602 and washing
Gas outlet 603, gas entrance 601 is connected with gas outlet 503 after filtering after filtering, and is washed suitable for gas after filtering is contacted with water
Processing is washed, so as to gas after being washed.Specifically, gas is passed through from the bottom of scrubber after filtering, water is from scrubber
Middle and upper part spray into, gas can be further purified in the presence of water after filtering, removed the dust in gas after filtering, obtained water
Gas after washing.It should be noted that the water of gas can be reused after simple stand after washing and filtering, so can further it reduce
The consumption of water, and then reduce the treating capacity of whole technique waste water.
Embodiments in accordance with the present invention, gas purification tower 700 has gas entrance 701 and purification gas exit 702 after washing,
Gas entrance 701 is connected with gas outlet 603 after washing after washing, and suitable for gas after washing is carried out into purified treatment, it is net to obtain
Change coal gas.Specifically, containing CO+H2Coal gas in prereduction and whole reduced iron miberal powder process, occur iron oxide and CO, iron oxide with
H2Etc. course of reaction, reaction result generation iron and H2O and CO2Sulphur in coal is converted into H by oxidizing gas, coal gasification course2S、
COS is mixed in coal gas, when coal gas recycle or later use before must be by coal gas cooled dehydrated and by chemical cleaning method
(such as low-temp methanol washing coal gas) is by CO in coal gas2And H2S is removed, and makes H in coal gas2S contents are less than 0.1%, CO2Content is less than
1%.
Following reaction occurs for reduction process：
Fe2O3+3H2=2Fe+3H2O
Fe2O3+ 3CO=2Fe+3CO2
FeO+H2=Fe+H2O
FeO+CO=Fe+CO2
Fe+H2S=FeS+H2
Embodiments in accordance with the present invention, with reference to Fig. 3, in dust outlet 204, particle outlet 403 and dust granules outlet 502
At least one of be connected with pre-reduced iron miberal powder entrance 102, and obtained suitable for the dust, the cyclone separator that obtain coal gas quenching column
To the supply of at least one of obtained dust granules of particle and ceramic filter to reaction tower.Thus, iron can be dramatically increased
The recovery utilization rate of miberal powder.
Embodiments in accordance with the present invention, with reference to Fig. 4, purification gas exit 702 and cooled coal gas entrance 202, the second percussion flow
At least one of nozzle 301 and pre-reduced iron miberal powder entrance 102 are connected, and the purification coal gas suitable for gas purification tower is obtained
At least one of second impinging stream nozzle of supply into coal gas quenching column and prereduction tower.Thus, it is remarkably improved whole
The production efficiency of system.
Embodiments in accordance with the present invention, with reference to Fig. 5, above-mentioned DRI, building materials, the system of Coal (syngas) polygeneration enter one
Step includes：High temperature casting apparatus 800.
According to embodiments of the present invention, high temperature casting apparatus 800 is connected with slag liquid outlet 105.Specifically, the slag of molten bath discharge
It is directly entered high temperature casting apparatus and carries out high temperature founding, produce artificial stone, while reclaiming high-temperature slag sensible heat, artificial stone is further
Building and ornament materials (building material product) are processed, realize that system solid waste is utilized, and reduce gasification Heisui River yield.By
This, can increase economic efficiency.
Embodiments in accordance with the present invention, above-mentioned DRI, building materials, the system of Coal (syngas) polygeneration at least have following
At least one of advantage：
DRI according to embodiments of the present invention, building materials, the system of Coal (syngas) polygeneration, coal dust gasification process are used
Airspace engine impinging stream nozzle principle, coal dust and oxygen stream are hit at a certain angle, realize that oxygen and coal dust are quickly mixed,
Accelerate the reaction speed of oxygen and coal dust, form piston flow reactor form, reduce flow field back-mixing.In laminar flow section (reduction section)
Spray into through pre-reduced iron miberal powder, reduction of iron ore fines degree can be improved, while entering using the sensible heat of coal gas of high temperature to pre-reduced iron miberal powder
Row reduces and realizes molten point of slag iron, and reduces the outlet temperature of the first coal gas, energy-saving, reduces the yield of waste water；
DRI according to embodiments of the present invention, building materials, the system of Coal (syngas) polygeneration are by the former tower bottom that reacts
Slag Quench section is changed to molten segmentation, realizes molten point of slag iron, and can each discharge；
DRI according to embodiments of the present invention, building materials, the slag liquid of the molten segmentation discharge of system of Coal (syngas) polygeneration
High temperature founding can be directly carried out, artificial stone is produced, while the sensible heat of recyclable high temperature sludge liquid.Artificial stone can be processed further production
Building and ornament materials, realize that system solid waste is utilized, and reduce the yield in gasification Heisui River in reaction tower, melt segmentation discharge
Molten iron founding or can further refine special steel；
DRI according to embodiments of the present invention, building materials, the system of Coal (syngas) polygeneration enter reacting furnace in Iron Ore Powder
It is preceding to enter the progress prereduction of prereduction tower first, the reduction degree and degree of metalization of system Iron Ore Powder are remarkably improved, while further
Using the outlet temperature of gas heat, further reduction coal gas, the thermal efficiency of system is improved；
DRI according to embodiments of the present invention, building materials, Coal (syngas) polygeneration the coal gas of system first entering it is pre- also
Coal gas quenching column is introduced into before former tower, the temperature of the coal gas of high temperature first is down to by 900 degrees Celsius of left sides using the cooled coal gas after purification
The right side, thus, it is to avoid Iron Ore Powder bond vitrified in prereduction tower, while adding the reduction degree of coal gas in prereduction tower, enters
And increase the degree of metalization of Iron Ore Powder；
DRI according to embodiments of the present invention, building materials, the system of Coal (syngas) polygeneration go out the second of prereduction tower
Coal gas can significantly reduce the solid content in coal gas through cyclone separator and ceramic filter dedusting, reduce follow-up scrubber
Water consumption, while reduce system waste water treating capacity；
DRI according to embodiments of the present invention, building materials, the system Iron Ore Powder of Coal (syngas) polygeneration enter prereduction tower
Second hit nozzle and use percussion flow form, add the scattered effect of gas-solid, the reaction time can be shortened, reduce reactor body
Product, reduces system investments.
In another aspect of the invention, the present invention propose it is a kind of using said system implement DRI, building materials,
The method of Coal (syngas) polygeneration, embodiments in accordance with the present invention, with reference to Fig. 6, this method includes：
S100：Oxygen and coal dust are supplied to the gasification section of reaction tower through the first impinging stream nozzle, by pre-reduced iron miberal powder
Supply to the reduction section of reaction tower so that gasified, reduced and melted a point reaction in reaction tower
In the step, oxygen and coal dust are supplied to the gasification section of reaction tower through the first impinging stream nozzle, by pre-reduced iron
Miberal powder is supplied to the reduction section of reaction tower so that gasified, reduced and melted a point reaction in reaction tower, to obtain the first coal
Gas, slag liquid and molten iron.Specifically, oxygen and coal dust are supplied to the gasification section of reaction tower, coal dust gas through the first impinging stream nozzle
Change also Primordial Qi of the generation containing carbon monoxide and hydrogen, the also Primordial Qi containing carbon monoxide and hydrogen is gone back with spraying into the pre- of reduction section
Former Iron Ore Powder carries out contact and carries out reduction treatment, and it is further reduced using the sensible heat and its reproducibility of also Primordial Qi, obtained
To pure iron and slag liquefy at high temperature, come downwards to the molten segmentation of reaction tower by gravity, realize molten iron and slag-liquid separation.
Inventor has found, by reaction tower gasification section using impinging stream nozzle principle by coal dust and oxygen at a certain angle
Hit to realize the quick mixing of coal dust and oxygen, accelerate the reaction speed of coal dust and oxygen, while forming piston flow reactor
Form, to reduce flow field back-mixing, by being passed through pre-reduced iron miberal powder in reaction tower reduction section, is remarkably improved the reduction of Iron Ore Powder
Spend, and the sensible heat of the coal gas of high temperature produced using gasification section is further reduced to pre-reduced iron miberal powder, is reduced simultaneously
The temperature of first coal gas, it is energy-saving, reduce the yield of coal gas cooling waste water.Tapered contracting is provided with the first gas exit
Mouthful, the Dust Capacity in the first coal gas can be substantially reduced.Molten segmentation is set in the bottom of reaction tower, realize slag iron molten point, and then
Realize the follow-up recycling of molten iron and slag liquid, molten iron founding or can further refine special steel.
According to one embodiment of present invention, the particle diameter of coal dust is not particularly restricted, and those skilled in the art can be with
Selected according to actual needs, according to the specific embodiment of the present invention, the particle diameter of coal dust can be 10-90 microns of accountings
More than 90%.Inventor has found that the coal dust of the particle size range has preferable gasification efficiency, so as to obtain carbon monoxide and hydrogen
The high also Primordial Qi of content, and then improve the reduction efficiency of pre-reduced iron miberal powder.
According to still a further embodiment, the water content of coal dust is not particularly restricted, those skilled in the art
It can be selected according to actual needs, according to the specific embodiment of the present invention, the water content of coal dust can be less than
2wt%.Thus, it is possible to further improve the reduction efficiency of pre-reduced iron miberal powder.
According to still another embodiment of the invention, the particular type of coal dust is not particularly restricted, those skilled in the art
Member can be selected according to actual needs, and according to the specific embodiment of the present invention, coal dust can be the god selected from northern Shensi
At least one of the weakly caking coal and free-burning coal on the ground such as mansion coal, Datong coal.
According to still another embodiment of the invention, the condition of gasification section gasification is not particularly restricted, the technology of this area
Personnel can be selected according to actual needs, and according to the specific embodiment of the present invention, the temperature of gasification can be 1800-
2000 degrees Celsius, the time can be 1~5 second.Inventor is had found, other conditions can be significantly better than under the conditions of being somebody's turn to do and improve coal dust
Gasification efficiency, so as to further improve the reduction efficiency of pre-reduced iron miberal powder.
According to still another embodiment of the invention, coal dust is not limited especially with oxygen, the mass ratio of pre-reduced iron miberal powder
System, those skilled in the art can be selected according to actual needs, according to the specific embodiment of the present invention, coal dust with
Oxygen ratio is (450~650) kg/ (300~420) m3, pre-reduced iron miberal powder and coal gas mass ratio can be ((0.5~2) t/
1000m3.Inventor has found that coal dust is with oxygen than suitable, effective gas CO+H in coal gas2Content is high, and efficiency of carbon con version is high, is conducive to iron
Miberal powder is reduced to be reduced with coal gas later use, coal/oxygen ratio, CO in coal gas2Gas content increase, reduces the reduction potential of coal gas, no
Beneficial to reduction of iron ore fines.Coal/oxygen is accordingly raised than reduction, reacting furnace temperature, and resistance to material, which corrodes, to be aggravated, but is conducive to molten point of slag iron.
And use the mixed proportion of the application to be conducive to molten point of slag iron while reduction efficiency is improved.
S200：First coal gas is supplied into coal gas quenching column and exchanged heat with cooled coal gas
In the step, the first coal gas is supplied into coal gas quenching column and exchanged heat with cooled coal gas, to obtain after heat exchange
Coal gas and dust.Inventor has found, before prereduction tower the first gas reduction Iron Ore Powder is fed to, in advance using cooled coal gas
Quench heat exchange is carried out to the first coal gas, the dust content in coal gas after heat exchange thus can be further reduced, while being stripped of H2O and
CO2, so as to improve the reproducibility of coal gas after heat exchange, and then the prereduction rate of Iron Ore Powder is improved, while coal gas after heat exchange can be reduced
Temperature, it is to avoid Iron Ore Powder bond vitrified is in prereduction tower.
According to one embodiment of present invention, the mixed volume ratio of cooled coal gas and the first coal gas is not particularly restricted, this
The technical staff in field can be selected according to actual needs, according to the specific embodiment of the present invention, cooled coal gas and the
The mixed volume ratio of one coal gas can be 0.5~0.7：1.Inventor has found that cooled coal gas, than high, enters with the first coal gas mixed volume
The gas temperature for entering prereduction tower is low, and it is powder pre-reduced to be unfavorable for iron ore, but the two ratio is too low can cause to enter prereduction coal gas
Temperature is too high and causes Iron Ore Powder to soften.Thus, it can ensure that the powder pre-reduced rate of iron ore is high using the mixed proportion of the application
While avoid the softening of Iron Ore Powder.
According to still a further embodiment, the temperature of coal gas is not particularly restricted after cooling, the technology of this area
Personnel can be selected according to actual needs, according to the specific embodiment of the present invention, and the temperature of coal gas can be with after cooling
No more than 1000 degrees Celsius.
S300：Coal gas after Iron Ore Powder and heat exchange is supplied to prereduction tower through the second impinging stream nozzle and carries out pre-reduction treatment
In the step, coal gas after Iron Ore Powder and heat exchange is supplied to prereduction tower through the second impinging stream nozzle and carries out prereduction
Processing, to obtain pre-reduced iron miberal powder and the second coal gas, and pre-reduced iron miberal powder is supplied into S100 through Geldart-D particle
Reaction tower.Inventor has found that Iron Ore Powder is introduced into prereduction tower and carries out pre-reduction treatment, a side in advance before reaction tower is entered
It can improve the heat utilization efficiency of whole system further using the sensible heat of coal gas after heat exchange, be on the other hand remarkably improved reaction in face
The degree of metalization of reduction efficiency and Iron Ore Powder in tower.In prereduction tower, using impinging stream nozzle principle is by Iron Ore Powder and changes
Coal gas hits to realize the quick mixing of coal gas after Iron Ore Powder and heat exchange at a certain angle after heat, accelerates Iron Ore Powder and coal after heat exchange
The reaction speed of gas, shortens the reaction time, while reducing reactor volume, reduces system investments.
According to one embodiment of present invention, the granularity of Iron Ore Powder is not particularly restricted, and those skilled in the art can
To be selected according to actual needs, according to the specific embodiment of the present invention, the granularity of Iron Ore Powder can be 10~90 μm.
Inventor has found that iron ore Powder Particle Size, which reduces, is conducive to gas-solid reaction, accelerates reduction of iron ore fines, is conducive to Geldart-D particle；But granularity
Further reduce gas solid separation difficult, dust content height in coal gas aggravates follow-up gas purification investment.Thus, using the application
Granularity Iron Ore Powder can improve reduction of iron ore fines rate while reduce cost of investment.
According to still a further embodiment, the particular type of Iron Ore Powder is not particularly restricted, the technology of this area
Personnel can be selected according to actual needs, according to the specific embodiment of the present invention, and Iron Ore Powder can be big selected from Australia
At least one of Leah imported iron ore fines, Brazilian imported iron ore, Anshan, liaoning Province iron ore, Hebei Qian'an iron ore.
According to still another embodiment of the invention, Iron Ore Powder and the mixing quality ratio of coal gas after cooling are not limited especially
System, those skilled in the art can be selected according to actual needs, according to the specific embodiment of the present invention, Iron Ore Powder
Mixing ratio with coal gas after cooling can be 0.5t：1000m3.Inventor has found, if when Iron Ore Powder and high coal gas ratio, reducing
Temperature can be reduced, and reduce reduction of iron ore fines speed, and gas-solid dispersion effect is not good, or even reduction tolerance is not enough, and Iron Ore Powder is with going back
It is former insufficient, aggravate final reduction reactor load.
DRI according to embodiments of the present invention, building materials, the method for Coal (syngas) polygeneration, by gasifying in reaction tower
Duan Caiyong impinging stream nozzles hit coal dust with oxygen to realize that coal dust and the quick of oxygen are mixed at a certain angle, accelerate coal dust
With the reaction speed of oxygen, while formed piston flow reactor form, to reduce flow field back-mixing, and by being reduced in reaction tower
Section sprays into pre-reduced iron miberal powder, is remarkably improved the reduction degree of Iron Ore Powder, and the coal gas of high temperature produced using gasification section is aobvious
Heat is further reduced to pre-reduced iron miberal powder, while the temperature of the first coal gas is reduced, it is energy-saving, reduce coal gas cooling
The yield of waste water, while arranging taper necking between reduction section and fusing section, and is arranged in cone by the first gas exit
On the reaction tower of shape necking side-walls, the Dust Capacity in the first coal gas can be substantially reduced, and set in the bottom of reaction tower
Molten segmentation, the reduzate that reduction section is obtained enters molten point that slag iron is realized in molten segmentation under gravity, and then realizes molten iron
With the follow-up recycling of slag liquid, molten iron founding or can further refine special steel, and slag liquid can be used for production building material product, by the
One coal gas is supplied into prereduction tower before reduced iron miberal powder, carries out Quench heat exchange to the first coal gas using cooled coal gas in advance, by
This can further reduce the dust content in coal gas after heat exchange, improve the reproducibility of coal gas after heat exchange, and then improve Iron Ore Powder
Prereduction rate, while the temperature of coal gas after heat exchange can be reduced, it is to avoid Iron Ore Powder bond vitrified is in prereduction tower, next Iron Ore Powder
Before reaction tower is entered, prereduction tower is introduced into advance and carries out pre-reduction treatment, on the one hand can further utilize coal gas after heat exchange
Sensible heat, improve whole system efficiency of utilization, the percent reduction in reaction tower is on the other hand remarkably improved, in addition, pre-
Reduce in tower, use impinging stream nozzle to hit coal gas after Iron Ore Powder and heat exchange at a certain angle to realize after Iron Ore Powder and heat exchange
The quick mixing of coal gas, accelerates Iron Ore Powder and the reaction speed of coal gas after heat exchange, shortens the reaction time, while reducing reactor body
Product, reduces system investments.
Embodiments in accordance with the present invention, with reference to Fig. 7, the method for above-mentioned processing Iron Ore Powder further comprises：
S400：The second coal gas obtained in S300 is supplied into cyclone separator and carries out separating treatment
In the step, the second coal gas obtained in S300 is supplied into cyclone separator and carries out separating treatment, so as to
Gas and particle after to dedusting.Inventor has found that being supplied by the second coal gas for obtaining prereduction tower can be with to cyclone separator
Remove the dust in the second coal gas, can reduce the solid content in the second coal gas, so reduce follow-up scrubber use water
Amount, reduces the wastewater treatment capacity of system.It should be noted that the series of cyclone separator is not particularly restricted, this area
Technical staff can be selected according to actual needs, for example, can be two-stage series connection with reference to Fig. 2.
S500：Gas after dedusting is supplied into ceramic filter and carries out filtration treatment
In the step, gas after dedusting is supplied into ceramic filter and carries out filtration treatment, so as to obtain dust granules and
Gas after filtering.Inventor has found that being supplied by gas after the dedusting that obtains cyclone separator can be further to ceramic filter
The dust in gas after dedusting, the solid content after reduction dedusting in gas, and then the further water consumption of reduction scrubber are removed,
The wastewater treatment capacity of reduction system.
S600：Gas after filtering is supplied into scrubber progress carrying out washing treatment is contacted with water
In the step, gas after filtering is supplied into scrubber progress carrying out washing treatment is contacted with water, to obtain water
Gas after washing.Specifically, gas is passed through from the bottom of scrubber after filtering, water is sprayed into from the middle and upper part of scrubber, filtering
Gas can be further purified in the presence of water afterwards, remove the dust in gas, gas after being washed after filtering.Need explanation
It is that the water of gas can be reused after simple stand after washing and filtering, so can further reduce the consumption of water, and then reduce
The treating capacity of whole technique waste water.
S700：Gas after washing is supplied into gas purification tower and carries out purified treatment
In the step, gas after washing is supplied into gas purification tower and carries out purified treatment, to be purified coal gas.Tool
Body, gas after washing is passed through in gas purification tower and carries out desulfurization and carbonization treatment successively, coal gas is purified.Specifically, containing
CO+H2Coal gas in prereduction and whole reduced iron miberal powder process, occur iron oxide and CO, iron oxide and H2Etc. course of reaction, reaction
As a result iron and H are generated2O and CO2Sulphur in coal is converted into H by oxidizing gas, coal gasification course2S, COS are mixed in coal gas,
When coal gas recycle or later use before must by coal gas cooled dehydrated and by chemical cleaning method (such as low-temp methanol wash coal
Gas) by CO in coal gas2And H2S is removed, and makes H in coal gas2S contents are less than 0.1%, CO2Content is less than 1%.
Following reaction occurs for reduction process：
Fe2O3+3H2=2Fe+3H2O
Fe2O3+ 3CO=2Fe+3CO2
FeO+H2=Fe+H2O
FeO+CO=Fe+CO2
Fe+H2S=FeS+H2
Embodiments in accordance with the present invention, with reference to Fig. 8, the above method further comprises：Dust, the S400 that S200 is obtained are obtained
To at least one of obtained dust granules of particle and S500 reaction tower of the supply into S100.Thus, it can dramatically increase
The recovery utilization rate of Iron Ore Powder, and then improve the content of molten iron in reaction tower.Thus, the recycling of Iron Ore Powder can be dramatically increased
Rate.
Embodiments in accordance with the present invention, with reference to Fig. 9, the above method further comprises：The purification coal gas that S700 is obtained is supplied
To at least one of second impinging stream nozzle in the coal gas quenching column and S300 into S200.Thus, it is remarkably improved whole
The production efficiency of individual technique.Thus, it is remarkably improved the production efficiency of whole system.
Embodiments in accordance with the present invention, with reference to Fig. 9, the above method further comprises：
S800：The obtained slag liquid of S100 is supplied and prepares building material product into high temperature casting apparatus
During being somebody's turn to do, specifically, the slag of molten bath discharge, which is directly entered high temperature casting apparatus, carries out high temperature founding, produce artificial
Stone, while reclaiming high-temperature slag sensible heat, artificial stone is processed further production building and ornament materials (building material product), realizes that system is consolidated
It is useless to utilize, and reduce gasification Heisui River yield.Thus, it is possible to increase economic efficiency.
It should be noted that it is above-mentioned for DRI, building materials, the feature described by the system of Coal (syngas) polygeneration and
Advantage is equally applicable to the DRI, building materials, the method for Coal (syngas) polygeneration, and here is omitted.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means to combine specific features, structure, material or the spy that the embodiment or example are described
Point is contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.Moreover, specific features, structure, material or the feature of description can be with office
Combined in an appropriate manner in one or more embodiments or example.In addition, in the case of not conflicting, the skill of this area
Art personnel can be tied the not be the same as Example or the feature of example and non-be the same as Example or example described in this specification
Close and combine.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changed, replacing and modification.
Claims (10)
1. the system of a kind of DRI, building materials, Coal (syngas) polygeneration, it is characterised in that including：
Limit gasification section, reduction section and molten segmentation, the gasification section arrangement in reaction tower, the reaction tower successively from top to bottom
There is the first impinging stream nozzle of supply oxygen and coal dust, the reduction section is disposed with pre-reduced iron miberal powder entrance, the reduction section
It is disposed between the molten segmentation on taper necking, the reaction tower of the taper necking side-walls and is disposed with the first coal gas
Outlet, the molten step-by-step arrangement has the outlet of slag liquid and molten iron outlet；
Coal gas quenching column, the coal gas quenching column has gas exit and dust after the first gas entry, cooled coal gas entrance, heat exchange
Outlet, first gas entry is connected with first gas exit；
Prereduction tower, the prereduction tower have supply Iron Ore Powder and the second impinging stream nozzle of coal gas, the second gas exit and
Pre-reduced iron miberal powder is exported, and second impinging stream nozzle is connected with gas exit after the heat exchange, the pre-reduced iron miberal powder
Outlet is connected with the pre-reduced iron miberal powder entrance.
2. system according to claim 1, it is characterised in that further comprise：
Cyclone separator, the cyclone separator has gas outlet and particle outlet, the gaseous mixture after gaseous mixture entrance, dedusting
Entrance is connected with second gas exit；
Ceramic filter, gas is exported after the ceramic filter has gas entrance after dedusting, dust granules outlet and filtered, described
Gas entrance is connected with gas outlet after the dedusting after dedusting；
Scrubber, the scrubber has gas outlet after gas entrance, water inlet and washing after filtering, after the filtering
Gas entrance is connected with gas outlet after the filtering；
Gas purification tower, the gas purification tower has gas entrance and purification gas exit, gas entrance after the washing after washing
It is connected with gas outlet after the washing.
3. system according to claim 2, it is characterised in that the dust outlet, the particle outlet and the dust
At least one of particle outlet is connected with the pre-reduced iron miberal powder entrance.
4. system according to claim 2, it is characterised in that the purification gas exit and the cooled coal gas entrance, institute
At least one of the second impinging stream nozzle and described pre-reduced iron miberal powder entrance is stated to be connected.
5. system according to claim 2, it is characterised in that further comprise：
High temperature casting apparatus, the high temperature casting apparatus is connected with slag liquid outlet.
6. the system described in a kind of use claim 1-5 implements DRI, building materials, the method for Coal (syngas) polygeneration,
It is characterised in that it includes：
(1) oxygen and coal dust are supplied to the gasification section of the reaction tower through first impinging stream nozzle, by prereduction iron ore
Powder is supplied to the reduction section of the reaction tower so that gasified, reduced and melted a point reaction in reaction tower, to obtain the first coal
Gas, slag liquid and molten iron；
(2) first coal gas is supplied into the coal gas quenching column and exchanged heat with cooled coal gas, so as to coal after being exchanged heat
Gas and dust；
(3) coal gas after Iron Ore Powder and heat exchange is supplied to the prereduction tower through second impinging stream nozzle and carried out at prereduction
Reason, to obtain pre-reduced iron miberal powder and the second coal gas, and the pre-reduced iron miberal powder is supplied described anti-into step (1)
Answer tower.
7. method according to claim 6, it is characterised in that further comprise：
(4) second coal gas obtained in step (3) is supplied and separating treatment is carried out into the cyclone separator, so as to
Gas and particle after to dedusting；
(5) gas after the dedusting is supplied and filtration treatment is carried out into the ceramic filter, to obtain dust granules and mistake
Gas after filter；
(6) gas after the filtering is supplied and contacts progress carrying out washing treatment with water into the scrubber, to be washed
Gas afterwards；
(7) gas after the washing is supplied and purified treatment is carried out into the gas purification tower, to be purified coal gas.
8. method according to claim 6, it is characterised in that further comprise：
(8) in the dust granules that the particle and step (5) that the dust that obtains step (2), step (4) are obtained are obtained at least it
The reaction tower of one supply into step (1).
9. method according to claim 6, it is characterised in that further comprise：
(9) the purification coal gas that step (7) is obtained is supplied in the coal gas quenching column and step (3) into step (2)
At least one of second impinging stream nozzle.
10. method according to claim 6, it is characterised in that further comprise：Further comprise：
(10) the slag liquid that step (1) is obtained is supplied and prepares building material product into the high temperature casting apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710448359.9A CN107177710A (en) | 2017-06-14 | 2017-06-14 | DRI, building materials, the system and method for Coal (syngas) polygeneration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710448359.9A CN107177710A (en) | 2017-06-14 | 2017-06-14 | DRI, building materials, the system and method for Coal (syngas) polygeneration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107177710A true CN107177710A (en) | 2017-09-19 |
Family
ID=59836891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710448359.9A Pending CN107177710A (en) | 2017-06-14 | 2017-06-14 | DRI, building materials, the system and method for Coal (syngas) polygeneration |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107177710A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108970354A (en) * | 2018-08-03 | 2018-12-11 | 山东大学 | Iron in a kind of pyrite smelting process, sulphur, three coproduction of coal gas device and method |
| CN109321703A (en) * | 2018-11-02 | 2019-02-12 | 山东大学 | A kind of short route fused reduction iron-smelting system and method |
| CN113776346A (en) * | 2021-10-18 | 2021-12-10 | 青岛维舍环保新能源科技有限公司 | Heat energy recovery gasification and metallurgy integrated device |
-
2017
- 2017-06-14 CN CN201710448359.9A patent/CN107177710A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108970354A (en) * | 2018-08-03 | 2018-12-11 | 山东大学 | Iron in a kind of pyrite smelting process, sulphur, three coproduction of coal gas device and method |
| CN109321703A (en) * | 2018-11-02 | 2019-02-12 | 山东大学 | A kind of short route fused reduction iron-smelting system and method |
| WO2020087733A1 (en) * | 2018-11-02 | 2020-05-07 | 山东大学 | Short-process smelting reduction iron-making system and method |
| CN109321703B (en) * | 2018-11-02 | 2023-09-29 | 河北燕山钢铁集团有限公司 | Short-process smelting reduction iron making system and method |
| CN113776346A (en) * | 2021-10-18 | 2021-12-10 | 青岛维舍环保新能源科技有限公司 | Heat energy recovery gasification and metallurgy integrated device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RU1813099C (en) | Method of producing liquid cast iron and installation for performing the method | |
| CN210215430U (en) | Zero-carbon-emission steelmaking equipment | |
| CN107177710A (en) | DRI, building materials, the system and method for Coal (syngas) polygeneration | |
| CN109306407B (en) | Device and method for treating and utilizing metallurgical zinc-containing dust | |
| CN106086281B (en) | A kind of flash ironmaking and the integrated apparatus and method of coal gas | |
| US5948139A (en) | Process for the production of molten pig iron or steel pre-products and a plant for carrying out the process | |
| CZ113194A3 (en) | Method of utilizing waste or residual substances containing iron | |
| CN100529110C (en) | Ironmaking and steelmaking | |
| CN110144470B (en) | Laterite-nickel ore rotary kiln reduction-blowing smelting process | |
| US4670049A (en) | Oxygen blast furnace for direct steel making | |
| RU2133780C1 (en) | Method of producing liquid iron or liquid steel semiproducts and plant for its embodiment | |
| RU2135598C1 (en) | Method of producing molten pig iron or steel semiproducts and plant for its embodiment | |
| CN207031476U (en) | DRI, building materials, the system of Coal (syngas) polygeneration | |
| US5853453A (en) | Method of processing iron-containing mettalurgical residual substances as well as arrangement for carrying out said method | |
| JPH0429732B2 (en) | ||
| CN214327826U (en) | Treatment and utilization device for recovering zinc oxide by smelting reduction of suspended metallurgical zinc-containing ash | |
| KR100440595B1 (en) | Process and plant for charging of metal carrying materials in a melt gasifier, plant for production of metal melts | |
| WO1998021371A1 (en) | Process for producing liquid pig iron or semifinished steel products from iron-containing materials | |
| US5286273A (en) | Method for steel making in high temperature reactor | |
| JP2916516B2 (en) | Method for producing liquid metal from metal oxide fine particles and reduction smelting furnace for carrying out this method | |
| US5466278A (en) | Process for the manufacture of steel | |
| AT406962B (en) | Process for treating steel slags and iron carriers in order to obtain pig iron and environmentally compatible slags | |
| CA2019050C (en) | Method and apparatus for steel making | |
| WO1999032666A1 (en) | Two step twin-single fluidized bed type pre-reduction apparatus for pre-reducing fine iron ore, and method therefor | |
| JP3787960B2 (en) | Smelting reduction smelting method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |