CN207243923U

CN207243923U - Quick reduction reactor and the quick reduction reaction system of water-cooled miberal powder

Info

Publication number: CN207243923U
Application number: CN201720907894.1U
Authority: CN
Inventors: 吴道洪; 郑倩倩; 孟嘉乐; 窦从从; 王培伦; 彭丽; 田广胜
Original assignee: Shenwu Technology Group Corp Co Ltd
Current assignee: Shenwu Technology Group Corp Co Ltd
Priority date: 2017-07-25
Filing date: 2017-07-25
Publication date: 2018-04-17
Anticipated expiration: 2027-07-25

Abstract

The utility model belongs to metallurgical technology field, and in particular to a kind of quick reduction reactor and the quick reduction reaction system of water-cooled miberal powder.System includes：Quick reduction reactor, heating system and also Primordial Qi system, wherein, the cooling section of the quick reduction reactor includes the air-cooled region and water cooling region set gradually from top to bottom；The also Primordial Qi system includes exhaust gas processing device and reduction gas storage tank, and the exhaust gas processing device is connected with the reduction offgas outlet of reactor and the reduction gas storage tank respectively, and the reduction gas storage tank is connected through also Primordial Qi air intake valve with the air distribution plate in air-cooled region.As a result, the reduction tail gas after reduction, after cleaning dust cooling, gas compression, carbonization treatment, what is obtained is rich in CO₂Reduction tail gas be sent into reduction tail gas storage tank, and obtained unreacted reducing gas be then sent into reduction gas storage tank in mixed with brand-new also Primordial Qi, hereby it is achieved that making full use of top gas, avoid wasting unreacted reducibility gas.

Description

Quick reduction reactor and the quick reduction reaction system of water-cooled miberal powder

Technical field

The utility model belongs to metallurgical technology field, and in particular to a kind of quick reduction reactor and water-cooled miberal powder are fast Fast reduction reaction system.

Background technology

It is well known that direct reduction processes of Iron ores is the cutting edge technology of development of iron ＆ steel industry, it is that development of iron ＆ steel industry is broken away from The yoke of coking coal resource, reduce energy consumption, reduce CO₂Discharge, the important hair for improving steel products structure, improving steel products quality Open up direction.Direct reduced iron is the substitute of high-quality steel scrap, is the source of iron raw material that can not be short for producing high-quality clean steel, is The high-quality cooling agent of pneumatic steelmaking.

Now, reach commercial production levels or be still broadly divided into two classes in the direct reduction process for continuing experiment：Use gas The direct-reduction process of body reducing agent and the direct-reduction process using solid reductant.Wherein, directly going back using gaseous reducing agent Former method is divided and can be divided into three classes by process equipment, including shaft furnace process, retort process making sponge iron and fluidized bed process.

Shaft furnace process be it is a kind of refer to furnace charge and coal gas in stove reverse movement, so that the furnace charge declined progressively by heated by gas and The method of reduction.The method is the direct reduction iron making that current development is most fast, most widely used using Midrex methods as representative. The specific work process of Midrex methods is：Oxide pellet as raw material is from after furnace roof adds shaft furnace, successively by preheating, going back Former and cooling three phases, reduce the sponge iron of gained, the sponge iron discharges out of the furnace after being cooled to 50 DEG C, to prevent reoxidizing； Wherein, reducing gas is manufactured with a part of coal gas of natural gas and shaft furnace in itself, 760-900 DEG C is first to heat to, in reduction shaft furnace Pars infrasegmentalis is passed through, and then, coal gas regeneration, conversion stove heat and shaft furnace cooling is respectively used to after stock gas recycling.Therefore, this method Heat and mass it is efficient, product energy consumption per ton can be down to 2.56 × 106 kilocalories, good product quality, and degree of metalization is up to 92%.Specially Sharp document CN201110282924.1 discloses a kind of method and device of gas-based reduction shaft furnace production direct reduced iron, uses Coal system also Primordial Qi and coke-stove gas combine supply shaft furnace production direct reduced iron.But there are some defects for the technique：It can only locate Manage lump material, it is impossible to directly handle powdery iron ore.Agglomeration is needed when handling powdery iron ore, the tedious process and consumption energy consumption Water, it is less economical.

The HyL methods of Mexico are unique industrialization retort processes making sponge iron, its specific course of work is as follows：Furnace charge is in retort In it is fixed, be passed through thermal reduction coal gas preheated, reduced and cooled down successively, finally periodically stop the supple of gas or steam, furnace charge discharged outside the tank. In addition, in order to overcome conventional fixed bed reducing gas to utilize the shortcomings that bad, HyL methods employ 4 retort serial operations, Reducing gas is manufactured with natural gas, first conversion insufficient in heat-exchanged reformer, and after the reaction of each retort All it is dehydrated, secondary conversion and temperature raising, coal gas are reduced at a high temperature of 1100 DEG C；Moreover, in the case where stopping ventilating, HyL Method forces discharge using discharge bar.Therefore, this method has the following advantages：It is not afraid of charging binding, operation temperature is higher, though between being Disconnected operation, productivity be not low.But this method still suffers from following shortcoming：It is poor that coal gas utilizes, and heat consumption is big, and product quality is uneven.

Fluidized bed process is the method that gas reduction Iron Ore Powder is used in fluid bed.In fluidized bed process reduction, specific work It is as follows to make process：Air flow press moldingization that the smitham bed of material is through simultaneously is heated, reduces and cooling successively, obtains going back original product Briquetting preserves after cooling；Wherein, coal gas also serves as the fluidizing agent of bulk cargo layer in addition to as reducing agent and heat carrier.Therefore, should Method has the following advantages：Fluidized reduction has directly the advantages of saving agglomeration using miberal powder, and since ore grain size is small and Can Accelerating reduction.But this method still suffers from following shortcoming：Particulate miberal powder very easily bonds, generally in 600-700 DEG C of not high temperature The lower operation of degree, not only reduction rate is little, but also easily facilitates the analysis carbon of CO to react；Carbon precipitating is excessive, then hinders normal behaviour Make.Therefore, a kind of quick reduction reaction system of miberal powder for reducing energy consumption, improving reduction gas utilization rate how is designed, becomes mesh The problem of preceding urgent need to resolve.

Utility model content

For above-mentioned problem existing in the prior art, the utility model provides a kind of quick reduction reactor and water The quick reduction reaction system of cold type miberal powder, direct reduced iron is produced for powder ore；Compared with gas-based shaft kiln, which can be with Powdery miberal powder is handled, saves the processes such as pelletizing, drying, roasting, whole technological process is simpler, simultaneously as powdery miberal powder Particle diameter is small, big with reducing gas contact area, and the chemical reaction rate between the two is accelerated, and increases feed throughput, in addition, quickly For reduction apparatus using heat accumulation type radiant tube as heat source, the efficiency of heating surface is high, while can reduce the dustiness in reduction tail gas；With Reduction fluid bed is compared, and quick reduction reaction system need to only control combustion gas, air mass flow to control the temperature in reactor, is operated Simply, while can avoid in fluidized reduction method stopping work caused by " bonding defluidization " phenomenon；Reduction tail gas after reduction passes through After cleaning dust cooling, gas compression, carbonization treatment, what is obtained is rich in CO₂Reduction tail gas be sent into reduction tail gas storage tank, and obtain To unreacted reducing gas be then sent into reduction gas storage tank and mix with brand-new also Primordial Qi, hereby it is achieved that to top gas progress Make full use of, avoid wasting unreacted reducibility gas.

In order to solve the above technical problems, the technical solution adopted in the utility model is：

The utility model provides a kind of quick reduction reactor, including：The feed zone that sets gradually from top to bottom, reduction Section and cooling section, are equipped with heating system in the reduction section, are reduced miberal powder and reducing gas in reactor for generation The heat of reaction；The cooling section includes the air-cooled region and water cooling region set gradually from top to bottom, wherein, the air-cooled area Domain bottom is equipped with air distribution plate, and preliminary cooling treatment is carried out to hot reduzate for introducing reducing gas；The water cooling region Be surrounded by water-cooling wall, the heat for reduzate in absorbing reaction device burner hearth.

On the other hand, the utility model provides a kind of quick reduction reaction system of water-cooled miberal powder, including：It is quick to go back Former reactor, heating system and also Primordial Qi system, wherein, the quick reduction reactor include setting gradually from top to bottom into Expect section, reduction section and cooling section, the heating system is equipped with the reduction section, make miberal powder and reduction in reactor for producing Gas carries out the heat of reduction reaction；The cooling section includes the air-cooled region and water cooling region set gradually from top to bottom, its In, the air-cooled sections bottom is equipped with air distribution plate, and preliminary cooling treatment is carried out to hot reduzate for introducing reducing gas； The water cooling region is surrounded by water-cooling wall, the heat for reduzate in absorbing reaction device burner hearth；The also Primordial Qi system System, including exhaust gas processing device and reduction gas storage tank, wherein, the exhaust gas processing device goes out with the reduction tail gas of reactor respectively Mouth is connected with the reduction gas storage tank, and the reduction tail gas for being discharged to reactor is handled, and obtains unreacted also Primordial Qi Body；The reduction gas storage tank is connected through also Primordial Qi air intake valve with air distribution plate, and the also Primordial Qi system further includes brand-new also Primordial Qi Source of the gas, the reduction gas storage tank are equipped with brand-new also Primordial Qi entrance connection brand-new also Primordial Qi source of the gas.Reduction gas storage tank is used for will be not anti- The reducing gas answered is mixed with new reducing gas, and mixed reducing gas is carried out heat via the air-cooled region of reactor Amount exchanges.

Inventor's discovery, a kind of quick reduction reaction system of water-cooled miberal powder described in the utility model, with gas-based shaft kiln Compare, which can handle powdery miberal powder, produce direct reduced iron for powder ore, save the works such as pelletizing, drying, roasting Sequence, whole technological process is simpler, and process is easily-controllable, simultaneously as powdered ore powder footpath is small, with reducing gas contact area Greatly, the chemical reaction rate between the two is accelerated, and increases feed throughput, in addition, quick reduction apparatus uses heat accumulation type radiant tube As heat source, the efficiency of heating surface is high, while can reduce the dustiness in reduction tail gas；Compared with reducing fluid bed, quick reduction Reaction system need to only control combustion gas, air mass flow to control the temperature in reactor, easy to operate, while can avoid fluidization also " bonding defluidization " shut-down caused by phenomenon in former method, can effectively reduce the energy consumption of the quick reducing process of miberal powder, mitigate reduction The burden of tail gas treatment device；Reduction tail gas after reduction obtains after cleaning dust cooling, gas compression, carbonization treatment Be rich in CO₂Reduction tail gas be sent into reduction tail gas storage tank, and obtained unreacted reducing gas be then sent into reduction gas storage tank in Mixed with brand-new also Primordial Qi, hereby it is achieved that making full use of top gas, avoid wasting unreacted reducibility gas.

Specific embodiment according to the present utility model, the heating system include multiple heat accumulation type radiant tubes, each accumulation of heat Formula radiant tube is vertically disposed side by side in the reduction section；The side wall of the reduction section is equipped with and the heat accumulating type spoke Penetrate fuel gas inlet, air intake and exhanst gas outlet that pipe is connected.

Specific embodiment according to the present utility model, the reduction gas storage tank further includes newly also Primordial Qi entrance, for by newly Also Primordial Qi be passed through it is described reduction gas storage tank in mixed with unreacted reducing gas.

Specific embodiment according to the present utility model, the also Primordial Qi system further include wind turbine, the air inlet of the wind turbine It is connected with the also Primordial Qi air intake valve, gas outlet is connected with the air distribution plate, described fast for mixing reducing gas to be passed through The air-cooled region of fast reduction reactor.

Specific embodiment according to the present utility model, the also Primordial Qi system further include nitrogen air intake valve and nitrogen storage Tank, described nitrogen air intake valve one end are connected with the nitrogen storage tank, and the other end is connected with the air inlet of the wind turbine, for controlling Nitrogen processed enters reactor and carries out air displacement, ensures that whole system is in nonoxidizing atmosphere before reducing gas enters reactor In.

Specific embodiment according to the present utility model, the exhaust gas processing device include wash cooling device, compression set And decarbonization device, wherein, the wash cooling device is connected with reduction offgas outlet, for the reduction tail gas discharged to reactor Washed, cooling treatment；The compression set is connected with the wash cooling device, for will be discharged to wash cooling device Gas be compressed processing；The decarbonization device is connected with the compression set and the reduction gas storage tank respectively, for inciting somebody to action Compressed gas carries out carbonization treatment, and obtained unreacted reducing gas is passed into the reduction gas storage tank and is gone back with new Raw-gas mixes；The also Primordial Qi system further includes reduction tail gas storage tank, is connected with the decarbonization device, for by decarbonization device What is obtained is rich in CO₂Reduction tail gas stored.

Specific embodiment according to the present utility model, further includes the discharging system, including miberal powder feed system and also Thing discharge system is originated in, wherein, the miberal powder feed system includes raw material cabin, bucket carries, upper gate valve, underthrust plate valve, material leakage cone And Vibrating Distribution Screen, wherein, the top carried respectively with raw material cabin and reactor of struggling against is connected, for carrying material；The upper plate Valve, underthrust plate valve, material leakage cone and Vibrating Distribution Screen are set in turn in the feed zone from top to bottom, pass through the upper gate valve Opened and closed with the alternating of underthrust plate valve, material envelope is carried out to the reactor；The reduzate discharge system, including discharging Device and storage bin, the drawing mechanism are connected with the discharge port of the quick reduction reactor and the storage bin, use respectively Stored in reduzate after cooling in reactor is transported storage bin via drawing mechanism.

The beneficial effects of the utility model are as follows：

（1）The utility model provides a kind of quick reduction reactor and the quick reduction reaction system of water-cooled miberal powder, Direct reduced iron is produced for powder ore, easy to operate, process is easily-controllable.

（2）The quick reduction reaction system of water-cooled miberal powder described in the utility model, compared with gas-based shaft kiln, which can To handle powdery miberal powder, the processes such as pelletizing, drying, roasting are saved, whole technological process is simpler, and process is easily-controllable, meanwhile, by Small in powdered ore powder footpath, big with reducing gas contact area, the chemical reaction rate between the two is accelerated, and increases Feedstock treating Amount, in addition, quick reduction apparatus uses heat accumulation type radiant tube, as heat source, the efficiency of heating surface is high, while can reduce reduction tail gas In dustiness.

（3）The quick reduction reaction system of a kind of water-cooled miberal powder described in the utility model, compared with reducing fluid bed, soon Fast reduction reaction system need to only control combustion gas, air mass flow to control the temperature in reactor, easy to operate, while can avoid flowing " bonding defluidization " shut-down caused by phenomenon, can effectively reduce the energy consumption of the quick reducing process of miberal powder, subtract in state restoring method The burden of light reduction tail gas treatment device.

（4）The utility model provides a kind of quick reduction reactor and the quick reduction reaction system of water-cooled miberal powder, For reduction tail gas after reduction after cleaning dust cooling, gas compression, carbonization treatment, what is obtained is rich in CO₂Reduction tail gas Reduction tail gas storage tank is sent into, and obtained unreacted reducing gas is then sent into reduction gas storage tank and is mixed with brand-new also Primordial Qi, by This, realizes and top gas is made full use of, and avoids wasting unreacted reducibility gas.

Brief description of the drawings

Fig. 1 is the process flow chart of the utility model.

Wherein, 1, raw material cabin, 2, bucket carry, 3, upper gate valve, 4, underthrust plate valve, 5, material leakage cone, 6, Vibrating Distribution Screen, 7, fast Fast reduction reactor, 8, heat accumulation type radiant tube, 9, fuel gas inlet, 10, combustion air inlet, 11, exhanst gas outlet, 12, air distribution plate, 13rd, water-cooling wall, 14, discharging it is spiral, 15, product feed bin, 16, wash cooling device, 17, compression set, 18, decarbonization device, 19, Reduce tail gas storage tank, 20, reduction gas storage tank, 21, nitrogen storage tank, 22, also Primordial Qi air intake valve, 23, nitrogen air intake valve, 24, Wind turbine, 25, reduction offgas outlet.

Embodiment

The embodiment of the utility model is described below in detail.The embodiments described below is exemplary, and is only used for explaining The utility model, and it is not intended that limitation to the utility model.Particular technique or condition are not specified in embodiment, according to The described technology of document in the art or condition are carried out according to product description.Life is not specified in agents useful for same or instrument Manufacturer person is produced, being can be with conventional products that are commercially available.

In the description of the utility model, it is to be understood that term " first ", " second " are only used for description purpose, and It is not intended that instruction or hint relative importance or the implicit quantity for indicating indicated technical characteristic.Thus, define One or more this feature can be expressed or be implicitly included to the feature of " first ", " second ".In the utility model In description, " multiple " are meant that two or more, unless otherwise specifically defined.

In the utility model, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " Gu It is fixed " etc. term should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally；Can be Mechanically connect or be electrically connected；It can be directly connected, can also be indirectly connected by intermediary, can be two The interaction relationship of connection or two elements inside element.For the ordinary skill in the art, can basis Concrete condition understands concrete meaning of the above-mentioned term in the utility model.

One side according to the present utility model, the utility model provide a kind of quick reduction reactor, including：From upper Feed zone, reduction section and the cooling section set gradually under, is equipped with heating system in the reduction section, makes reactor for producing Middle miberal powder and reducing gas carry out the heat of reduction reaction；The cooling section include the air-cooled region that sets gradually from top to bottom and Water cooling region, wherein, the air-cooled sections bottom is equipped with air distribution plate, and hot reduzate is carried out just for introducing reducing gas Walk cooling treatment；The water cooling region is surrounded by water-cooling wall, the heat for reduzate in absorbing reaction device burner hearth.

Other side according to the present utility model, the utility model provide a kind of quick reduction reaction of water-cooled miberal powder System, including：Quick reduction reactor 7, heating system and also Primordial Qi system, wherein, the quick reduction reactor include from Feed zone, reduction section and the cooling section set gradually under, is equipped with heating system in the reduction section, makes reaction for producing Miberal powder and reducing gas carry out the heat of reduction reaction in device；The cooling section includes the air-cooled region set gradually from top to bottom With water cooling region, wherein, the air-cooled sections bottom is equipped with air distribution plate 12, for introduce reducing gas to hot reduzate into The preliminary cooling treatment of row；The water cooling region is surrounded by water-cooling wall, the heat for reduzate in absorbing reaction device burner hearth Amount；It is described also Primordial Qi system, including exhaust gas processing device and reduction gas storage tank, wherein, the exhaust gas processing device respectively with instead The reduction offgas outlet 25 and the reduction gas storage tank 20 for answering device connect, at the reduction tail gas discharged to reactor Reason, obtains unreacted reducing gas；The reduction gas storage tank is connected through also Primordial Qi air intake valve with air distribution plate 12, the reduction Gas system further includes brand-new also Primordial Qi source of the gas, and the reduction gas storage tank is equipped with brand-new also Primordial Qi entrance connection brand-new also Primordial Qi gas Source.After the reduction tail gas of reactor discharge is handled to obtain unreacted reducing gas, reduction gas storage tank is used for will be not anti- The reducing gas answered is mixed with new reducing gas, and mixed reducing gas is carried out heat via the air-cooled region of reactor Amount exchanges.

The quick reduction reaction system of a kind of water-cooled miberal powder described in the utility model, including also Primordial Qi system, for pair Reactor discharge reduction tail gas handled after obtain unreacted reducing gas so that the unreacted reducing gas with New reducing gas mixing reenters reactor and carries out reduction reaction.Specific embodiment according to the present utility model, it is described to go back Primordial Qi system, including exhaust gas processing device and reduction gas storage tank 20, wherein, the exhaust gas processing device respectively with reactor also Former offgas outlet 25 is connected with the reduction gas storage tank, and the reduction tail gas for being discharged to reactor is handled, and is obtained not anti- The reducing gas answered；The reduction gas storage tank is connected through also Primordial Qi air intake valve 22 with air distribution plate 12, and the also Primordial Qi system is also Including brand-new also Primordial Qi source of the gas, the reduction gas storage tank is equipped with brand-new also Primordial Qi entrance connection brand-new also Primordial Qi source of the gas.Most opening When beginning to produce, reducing gas is supplied to reduce miberal powder by brand-new also Primordial Qi source of the gas, at the reduction tail gas of reactor discharge After reason obtains unreacted reducing gas, reduction gas storage tank is used to supply unreacted reducing gas and brand-new also Primordial Qi source of the gas New reducing gas mixing, and mixed reducing gas is subjected to heat exchange via the air-cooled region of reactor.

Specific embodiment according to the present utility model, the exhaust gas processing device include wash cooling device 16, compression dress 17 and decarbonization device 18 are put, the reduction tail gas for being discharged to reactor is handled, isolated unreacted reducing gas And rich in CO₂Reduction tail gas.The entrance of the wash cooling device and the reduction tail gas of the quick reduction reactor 7 go out Mouth connection, the reduction tail gas for being discharged to reactor is washed, cooling treatment；The entrance of the compression set is washed with described The outlet connection of cooling device is washed, for the gas discharged to wash cooling device to be compressed processing；The decarbonization device Entrance be connected with the outlet of the compression set, carry out carbonization treatment for the compressed gas of discharging compression set, Isolated unreacted reducing gas and rich in CO₂Reduction tail gas；The decarbonization device reducing gas outlet with The recycling reducing gas entrance connection of the reduction gas storage tank, the unreacted reducing gas for decarbonization device to be discharged are passed through Into the reduction gas storage tank, mixed in the reduction gas storage tank with new reducing gas.It is according to the present utility model specific Embodiment, the also Primordial Qi system further include reduction tail gas storage tank 19, and the entrance of the reduction tail gas storage tank is filled with the decarburization The reaction gas outlet connection put, CO is rich in for obtain decarbonization device₂Reduction tail gas stored.Hereby it is achieved that Reduction tail gas is separated, obtain unreacted reducing gas be discharged into reduction tail gas storage tank with new reducing gas into Row mixed processing, the reducing gas resource as reactor are laid in, and to ensure recycling for reduction tail gas, can be mitigated The burden of tail gas treatment device in whole system, effectively reduces the energy consumption of direct-reduction technique；And isolated is rich in CO₂ Reduction tail gas, be passed into reduction tail gas storage tank in stored, reduce exhaust gas discharge, it is environmentally friendly.

Specific embodiment according to the present utility model, the reduction gas storage tank 20 include reducing gas and export and recycle reduction Gas access, the recycling reducing gas entrance of the reduction gas storage tank are connected with the reducing gas outlet of the decarbonization device, institute The reducing gas outlet for stating reduction gas storage tank is connected with the quick reduction reactor 7, and protocercal tail is gone back for discharge reactor Unreacted reducing gas is obtained after handling via the exhaust gas processing device in gas to be stored and collected, and is realized unreacted Reducing gas, which is again introduced into reactor, carries out reduction reaction, ensures the cycling and reutilization of reduction tail gas；Preferably, the reduction The reducing gas outlet of gas storage tank is connected through also Primordial Qi air intake valve with the air distribution plate 12 of the reactor, for will be unreacted Reducing gas carries out heat exchange via the air-cooled region of reactor.Further, the reduction gas storage tank further includes new reduction Gas entrance, the new also Primordial Qi entrance of the reduction gas storage tank are connected with reduction device of air, described for new also Primordial Qi to be passed through Reduction gas storage tank in mixed with unreacted reducing gas, and by mixed reducing gas via reactor air-cooled region into Row heat exchange.

Specific embodiment according to the present utility model, the also Primordial Qi system further include wind turbine 24, nitrogen air intake valve 23 With nitrogen storage tank 21, for controlling reducing gas and nitrogen to adjust the atmosphere of whole system.Described nitrogen air intake valve one end Outlet with the nitrogen storage tank is connected, and the other end is connected with the air inlet of the wind turbine, for controlling nitrogen to enter reactor Air displacement is carried out, ensures that whole system is in nonoxidizing atmosphere before reducing gas enters reactor.The wind turbine, air inlet Mouth can be connected with also Primordial Qi air intake valve 22 or the nitrogen air intake valve, the gas outlet of the wind turbine and the cloth Aerofoil connects, for guiding reducing gas or nitrogen to be transported in reactor；Wherein, when the wind turbine air inlet with it is described When also Primordial Qi air intake valve 22 connects, the gas outlet of the wind turbine is connected with the air distribution plate, for mixing reducing gas to be led to Enter the air-cooled region of the quick reduction reactor；When the air inlet of the wind turbine is connected with the nitrogen air intake valve, described The gas outlet of wind turbine is connected with the air distribution plate, and the air-cooled region for nitrogen to be passed through to the quick reduction reactor carries out empty Gas is replaced, and ensures that whole system is in nonoxidizing atmosphere before reducing gas enters reactor.

The course of work of the also Primordial Qi system is as follows：

1st, nitrogen purge：Need to carry out nitrogen purging to whole system before also Primordial Qi enters reactor, to protect Card whole system is in nonoxidizing atmosphere.When nitrogen purges, also Primordial Qi air intake valve is closed, opens nitrogen air intake valve, Then wind turbine is opened, the nitrogen in nitrogen storage tank is entered in quick reduction reactor.

2nd, reducing gas course of conveying：Nitrogen purging finishes, and closes nitrogen air intake valve, opens also Primordial Qi air intake valve, Then wind turbine is opened, the reducing gas in gas storage tank is reduced by air distribution plate even into quick reduction reactor, is gone back Original reaction.

3rd, vent gas treatment process is reduced：After quick reduction reactor completes reduction reaction, discharge reduction tail gas.Participate in reaction Reduction tail gas afterwards sequentially enters wash cooling device and carries out wash cooling processing, compression set from reduction offgas outlet discharge After being compressed processing, decarbonization device progress carbonization treatment, unreacted reducing gas is obtained and rich in CO₂Reduction tail gas； Wherein, what is obtained is rich in CO₂Reduction tail gas enter reduction tail gas storage tank and be collected storage, obtain unreacted is and Primordial Qi Body enters in reduction gas storage tank to be mixed with new reducing gas, enters reactor via also Primordial Qi air intake valve, wind turbine again In reduced.Hereby it is achieved that being recycled to reduction tail gas, the negative of tail gas treatment device in whole system can be mitigated Load, effectively reduces the energy consumption of direct-reduction technique.

The utility model provides a kind of quick reduction reaction system of water-cooled miberal powder, including quick reduction reactor 7, uses In carrying out direct-reduction processing to miberal powder, reduction tail gas and reduzate are obtained.Specific embodiment according to the present utility model, institute Feed zone, reduction section and cooling section that quick reduction reactor includes setting gradually from top to bottom are stated, miberal powder is added by feed zone Into reactor, reduction reaction is carried out through reduction section and reducing gas, obtains reduction tail gas and reduzate, the reduzate Discharged via after cooling section progress cooling treatment by discharge port, the reduction tail gas is discharged into described go back via reduction offgas outlet In the exhaust gas processing device of Primordial Qi system.Specific embodiment according to the present utility model, also sets up on the side wall of reactor head There is reduction offgas outlet, its discharge line connects the air inlet pipe of wash cooling device.

Specific embodiment according to the present utility model, the reduction section, positioned at the middle part of reactor, for miberal powder to be carried out Direct-reduction, obtains reduzate and reduction tail gas.Heating system is equipped with the reduction section, makes reactor chats for producing Powder and reducing gas carry out the heat of reduction reaction.Further, the type of the heating system is not particularly limited, as long as energy The reaction temperature of stabilization is enough provided for reactor, can be heat accumulating type system that multiple heat accumulation type radiant tubes 8 form or It is heating system of multiple high-temperature heating circle compositions etc..Preferably, the reducing gas via the reduction section bottom into Enter, the miberal powder enters via the top of the reduction section, and two kinds of raw materials are impacted by convection current, collided, and are conducive to both Between come into full contact with, promote miberal powder fully to be reduced；Obtained reduzate since self gravitation constantly falls, via The bottom discharge of reduction section carries out cooling treatment to cooling section；Obtained reduction tail gas constantly freely rises, via reduction section Top is discharged, and is then discharged into via the reduction offgas outlet positioned at reactor head side wall in wash cooling device.

Specific embodiment according to the present utility model, the cooling section, positioned at the bottom of reactor, for being gone back to what is obtained Originate in thing and carry out cooling treatment.The cooling section includes the air-cooled region and water cooling region set gradually from top to bottom, right successively Obtained reduzate carries out cooling treatment.The air-cooled sections bottom is equipped with air distribution plate 12, for introducing reducing gas to heat State reduzate carries out preliminary cooling treatment, in order to which the hot reduzate that will react generation is normal in reactor with having just enter into Warm reducing gas carries out heat exchange processing, the reduzate and pre-warmed reducing gas tentatively cooled down；Wherein, it is described preliminary The reduzate of cooling carries out secondary cooling processing since self gravitation constantly falls, into water cooling region；It is described pre-warmed Reducing gas constantly freely rises, and enters reduction section and carries out reduction treatment to miberal powder；Thus, the heat exchange processing in air-cooled region, Not only the preliminary cooling to hot reduzate had been realized, but also has been conducive to be rapidly heated after the reducing gas after preheating enters reduction section And react, the heat of reduzate is taken full advantage of, reduces the energy expenditure of production process, reduces production cost.The water cooling Region is surrounded by water-cooling wall, the heat for reduzate in absorbing reaction device burner hearth；Wherein, water-cooling wall 13 is water cooling area The important component in domain, is distributed in reactor bottom surrounding, inside is flowing water or steam, for absorbing reduzate in burner hearth Heat, realize the reducing temperature twice of reduzate.Specific embodiment according to the present utility model, the shape of the cooling section from Concrete restriction, as long as reduzate can be made smoothly to fall.Further, the cooling section is tapered, is conducive to reduce Product utilization self gravitation constantly falls and carries out comprehensive cooling treatment.

Specific embodiment according to the present utility model, the feed zone, positioned at the top of reactor, for miberal powder to be added Reduction treatment is carried out into reactor.The feed zone includes upper gate valve 3, underthrust plate valve 4, material leakage cone 5 successively from top to bottom With Vibrating Distribution Screen 6, opened and closed by the alternating of the upper gate valve and underthrust plate valve, in charging to the reactor Its top feed mouth is closed in turn；Thus, while ensureing that miberal powder falls smooth, also to ensure in miberal powder dropping process The leakproofness of reactor.

The course of work of the quick reduction reactor is as follows：

1st, miberal powder is added in reactor via the feed zone of reactor head.First, gate valve in opening, miberal powder via Dropped down onto under feed inlet on lower plugboard valve, then, gate valve in closing, opens underthrust plate valve, make the powder between two gate valves Bored successively via material leakage, reduction section is dropped down onto under Vibrating Distribution Screen, material leakage cone avoids miberal powder from assembling, and ensure that what miberal powder fell Smoothness；Then, underthrust plate valve is closed, gate valve, which makes to be deposited in, in opening drops down onto lower plugboard valve under the powder on gate valve On, charging is so repeated, is used cooperatively by the alternating of upper gate valve and underthrust plate valve, ensure that powder in dropping process Middle reactor is in sealing state from beginning to end.

2nd, miberal powder in the reactor portion reduction section carry out reduction treatment.Under the heat effect of heating system, reduction section Internal furnace temperature is higher（Preferably, the burner hearth of reduction section is heated system and is heated to 900-1200 DEG C）, be reduction reaction into Row provides advantage.Miberal powder freely falls to cooling section via reduction section, and reducing gas is preheated via cooling section（Also Raw-gas is preheated to 300-600 DEG C）Reduction section is freely risen to afterwards, and impact occurs in both by convection, fully Contact, chemically reacts, and obtains reduzate and reduction tail gas；Obtained reduzate since self gravitation constantly falls, Via the bottom discharge of reduction section cooling treatment is carried out to cooling section；Obtained reduction tail gas constantly freely rises, via reduction The top discharge of section, is then discharged into wash cooling device via the reduction offgas outlet positioned at reactor head side wall.Its In, the reaction mechanism of miberal powder and reducibility gas is：Me_xO_y+CO→Me+CO₂, Me_xO_y+H₂→Me+H₂O.Due to miberal powder particle diameter Small, heat transfer condition and reacting dynamics condition substantially improve between gas-solid, and reduction reaction can be completed in a few seconds, realize directly The quick production process of reduced iron.

3rd, miberal powder carries out cooling treatment in the cooling section of reactor bottom.The reduzate that reduction section obtains is hot reduction Product, first, preliminary cooling processing is carried out into air-cooled region, i.e., described hot reduzate and just via air distribution plate uniformly into Enter and exchange heat between the room temperature reducing gas in reactor so that the temperature of hot reduzate is down to 600-900 DEG C, with this Meanwhile reducing gas is preheated to 300-600 DEG C；Then, via the reduzate of preliminary cooling processing enter water cooling region into The processing of row reducing temperature twice, i.e., heat exchange when passing through water-cooling wall via the reduzate of preliminary cooling processing are handled so that are distributed in The water-cooling wall of reactor bottom surrounding can effectively absorb the heat of reduzate in burner hearth, obtain temperature and be down to going back for room temperature Thing is originated in, realizes the reducing temperature twice of reduzate.Obtained room temperature reduzate is discharged via the discharge port of reactor.

The utility model provides a kind of quick reduction reaction system of water-cooled miberal powder, including heating system, for be anti- Device is answered to provide the heat needed for miberal powder progress reduction treatment.The heating system is arranged in the reduction section of the reactor, is used Make miberal powder and the heat of reducing gas progress reduction reaction in reactor in producing.Specific embodiment according to the present utility model, The heating system includes multiple heat accumulation type radiant tubes 8, and each heat accumulation type radiant tube is vertically disposed side by side on described go back In former section, be conducive to be evenly heated miberal powder in reduction section and reducing gas, avoid temperature present in reaction compartment point The non-uniform problem of cloth, meanwhile, also help miberal powder and fallen using free gravity, it is unobstructed, it is smooth to ensure that miberal powder falls.Institute The side wall for stating reduction section is equipped with fuel gas inlet 9, air intake 10 and the exhanst gas outlet being connected with the heat accumulation type radiant tube 11, the fuel gas inlet is used to input combustion gas, the air intake, that is, combustion air inlet 10, for inputting combustion air, institute State exhanst gas outlet to be used to export flue gas so that combustion gas and air, which enter in heat accumulation type radiant tube, occurs combustion reaction, the height of generation Warm flue gas is discharged after heating to reactor；Preferably, the heat that combustion gas and air burning produce is mainly with radiation Mode transfers heat to miberal powder and reducing gas in reactor, brings it about reduction reaction and obtains reduzate, heat accumulating type spoke Penetrate the fuel gas flow system in pipe and the reduction flow of air system in reactor is isolated from one another, do not interfere with the reduction in reactor Process.Further, the gas flow that heat accumulation type radiant tube can be passed through by adjusting can accurately control temperature in reactor Spend field, it is possible thereby to control reactor temperature field number and temperature gradient, realize in reactor reduction process it is accurate Temperature control.Thus, the heating system, realizes and miberal powder in reduction section and reducing gas is evenly heated, and avoids reaction empty Between present in temperature distributing disproportionation it is even the problem of, meanwhile, also help miberal powder using free gravity fall, it is unobstructed, protect It is smooth to demonstrate,prove miberal powder whereabouts.

The utility model provides a kind of quick reduction reaction system of water-cooled miberal powder, further includes the discharging system, For carrying out pan feeding and discharging processing to reactor.Specific embodiment according to the present utility model, the discharging system include Miberal powder feed system and reduzate discharge system, the miberal powder feed system are used for reactor conveying mineral powder, the reduction Product discharge system is used to the reduzate of reactor discharge carrying out output processing.The miberal powder feed system includes raw material cabin 1st, bucket carries 2, upper gate valve 3, underthrust plate valve 4, material leakage cone 5 and Vibrating Distribution Screen 6.It is described bucket carry respectively with raw material cabin and reactor Top be connected, for carry material.The upper gate valve, underthrust plate valve, material leakage cone and Vibrating Distribution Screen are set gradually from top to bottom In in the feed zone, opened and closed by the alternating of the upper gate valve and underthrust plate valve, the reactor is expected Envelope, moreover, the powder being deposited on gate valve further enhances sealing effect, realizes " material envelope ", meanwhile, two plates Valve is used cooperatively, and ensure that powder reactor in dropping process is in sealing state from beginning to end.Material leakage is bored, and is arranged on down Between gate valve and Vibrating Distribution Screen, vibration is dropped down onto under the miberal powder between two gate valves is bored by material leakage under the effect of gravity During Cloth sieve, arrange that material leakage in the reactor bores the aggtegation for avoiding miberal powder, ensure that miberal powder falls suitable Smooth property.Vibrating screen, passes through effect of vibration so that reduction section of the miberal powder even into reactor.The reduzate discharge system, Including drawing mechanism 14 and storage bin 15, the secondary cooling reduzate for the discharge of transport reactor discharge port.The discharging Device is connected with the discharge port of the quick reduction reactor and the storage bin respectively, for being gone back after cooling in reactor Original thing transports storage bin via drawing mechanism and is stored.Further, the drawing mechanism 14 is discharging spiral 14；Institute It is product feed bin 15 to state storage bin 15.

Other side according to the present utility model, the utility model additionally provide a kind of fast using above-mentioned water-cooled miberal powder The production method of fast reduction reaction system, comprises the following steps：

（1）Produce the preparation before starting：First, air-tight test is carried out to system, ensures the sealing of whole system Property；Then, air displacement is carried out to reactor, opens nitrogen air intake valve, nitrogen carries out nitrogen purging through air distribution plate, ensures whole A system is in nonoxidizing atmosphere；Finally, the temperature of reduction section is set, and the heat provided by adjusting heating system is realized To the accurate temperature controlling of reduction process.

Specific embodiment according to the present utility model, the miberal powder feed system include raw material cabin, bucket carry, upper gate valve, Underthrust plate valve, material leakage cone and Vibrating Distribution Screen, for reactor conveying mineral powder.The upper gate valve, underthrust plate valve, material leakage cone It is set in turn in the feed zone with Vibrating Distribution Screen, is opened by the alternating of the upper gate valve and underthrust plate valve from top to bottom Open and close, material envelope is carried out to the reactor, moreover, the powder being deposited on gate valve further enhances sealing effect Fruit, realizes " material envelope ", meanwhile, two gate valves are used cooperatively, and ensure that powder, reactor is from beginning extremely in dropping process It is in sealing state eventually.

Specific embodiment according to the present utility model, the also Primordial Qi system further include wind turbine, nitrogen air intake valve and nitrogen Gas storage tank, for controlling reducing gas and nitrogen to adjust the atmosphere of whole system.Described nitrogen air intake valve one end with it is described The outlet connection of nitrogen storage tank, the other end are connected with the air inlet of the wind turbine, and sky is carried out for controlling nitrogen to enter reactor Gas is replaced, and ensures that whole system is in nonoxidizing atmosphere before reducing gas enters reactor.

Specific embodiment according to the present utility model, the heating system are arranged in the reduction section of the reactor, are used Make miberal powder and the heat of reducing gas progress reduction reaction in reactor in producing.The heating system includes multiple heat accumulating type spokes Penetrate pipe, each heat accumulation type radiant tube is vertically disposed side by side in the reduction section, be conducive to miberal powder in reduction section and Reducing gas is evenly heated, and avoids the problem that temperature distributing disproportionation present in reaction compartment is even, meanwhile, also help ore deposit Powder is fallen using free gravity, unobstructed, and it is smooth to ensure that miberal powder falls.The side wall of the reduction section is equipped with and the accumulation of heat Fuel gas inlet, air intake and the exhanst gas outlet that formula radiant tube is connected, the fuel gas inlet are used to input combustion gas, the air Entrance is used for input air, and the exhanst gas outlet is used to export flue gas so that combustion gas and air, which enter in heat accumulation type radiant tube, to be sent out Raw combustion reaction, the high-temperature flue gas of generation are discharged after heating to reactor；Preferably, combustion gas and air burning produce Heat miberal powder and reducing gas in reactor are mainly transferred heat in a manner of radiation, bring it about reduction reaction acquisition Reduzate, the fuel gas flow system in heat accumulation type radiant tube and the reduction flow of air system in reactor are isolated from one another, will not Influence the reduction process in reactor.Further, the gas flow that heat accumulation type radiant tube can be passed through by adjusting can essence The really temperature field in control reactor, it is possible thereby to control reactor temperature field number and temperature gradient, is realized to reaction The accurate temperature controlling of reduction process in device.

（2）Reduction phase：After temperature of reactor reaches setting value and keeps stablizing, nitrogen air intake valve is closed, is opened Also Primordial Qi air intake valve, makes reducing gas enter reactor reduction section, afterwards again by miberal powder via feed system, reactor feed Section is added to reduction section；The reducing gas in gas storage tank is reduced via the air distribution plate in air-cooled region even into cooling section, then Rise to reduction section and carry out reduction reaction with miberal powder, obtain hot reduzate and reduction tail gas.

Specific embodiment according to the present utility model, the miberal powder feed system include raw material cabin, bucket carry, upper gate valve, Underthrust plate valve, material leakage cone and Vibrating Distribution Screen.The top carried respectively with raw material cabin and reactor of struggling against is connected, for carrying material. The upper gate valve, underthrust plate valve, material leakage cone and Vibrating Distribution Screen are set in turn in the feed zone from top to bottom, pass through institute The alternating for stating gate valve and underthrust plate valve opens and closes, and material envelope is carried out to the reactor, moreover, being deposited in gate valve On powder further enhance sealing effect, realize " material envelope ", meanwhile, being used cooperatively for two gate valves, ensure that powder Material reactor in dropping process is in sealing state from beginning to end.Material leakage is bored, be arranged on underthrust plate valve and Vibrating Distribution Screen it Between, during Vibrating Distribution Screen is dropped down onto under the miberal powder between two gate valves is bored by material leakage under the effect of gravity, arrangement Material leakage cone in the reactor avoids the aggtegation of miberal powder, ensure that the smoothness that miberal powder falls.Vibrating screen, passes through vibration Effect so that reduction section of the miberal powder even into reactor.Specific embodiment according to the present utility model, step（2）Middle charging The fill process of system includes：Miberal powder in raw material cabin is promoted to reactor head by bucket, gate valve in opening, miberal powder warp By being dropped down onto under feed inlet on lower plugboard valve, then, gate valve in closing, opens underthrust plate valve, makes the powder between two gate valves Material bores via material leakage, reduction section is dropped down onto under Vibrating Distribution Screen successively, and material leakage cone avoids miberal powder from assembling, and ensure that miberal powder falls Smoothness；Then, underthrust plate valve is closed, gate valve, which makes to be deposited in, in opening drops down onto lower plugboard valve under the powder on gate valve On, charging is so repeated, is used cooperatively by the alternating of upper gate valve and underthrust plate valve, ensure that powder in dropping process Middle reactor is in sealing state from beginning to end.

Miberal powder is as follows via the specific work process of feed system：Miberal powder in raw material cabin is promoted to reactor by bucket Top, is added in reactor via the feed zone of reactor head.First, gate valve in opening, miberal powder is via under feed inlet Drop down onto on underthrust plate valve, then, gate valve in closing, opens underthrust plate valve, make powder between two gate valves successively via Reduction section is dropped down onto under material leakage cone, Vibrating Distribution Screen, material leakage cone avoids miberal powder from assembling, and ensure that the smoothness that miberal powder falls； Then, close underthrust plate valve, the upper gate valve of openings, which makes to be deposited in, to be dropped down onto under the powder on gate valve on lower plugboard valve, it is such instead Fed, be used cooperatively by the alternating of upper gate valve and underthrust plate valve again, ensure that powder reactor in dropping process Sealing state is in from beginning to end.

Specific embodiment according to the present utility model, the reduction gas storage tank reducing gas outlet is through also Primordial Qi air intake valve It is connected with the air distribution plate of the reactor, for unreacted reducing gas and new reducing gas to be mixed, after mixing Reducing gas via reactor air-cooled region carry out heat exchange.Further, the air inlet of the wind turbine is gone back with described Primordial Qi air intake valve connects, when the gas outlet of the wind turbine is connected with the air distribution plate, for mixing reducing gas to be passed through institute The air-cooled region for stating quick reduction reactor carries out pre-add heat treatment.

Specific embodiment according to the present utility model, the cooling section, positioned at the bottom of reactor, for being gone back to what is obtained Originate in thing and carry out cooling treatment.The cooling section includes the air-cooled region and water cooling region set gradually from top to bottom, right successively Obtained reduzate carries out cooling treatment.The air-cooled sections bottom is equipped with air distribution plate, for introducing reducing gas to hot Reduzate carries out preliminary cooling treatment, in order to react the hot reduzate of generation and have just enter into the room temperature in reactor Reducing gas carries out heat exchange processing, the reduzate and pre-warmed reducing gas tentatively cooled down；Wherein, it is described preliminary cold But reduzate carries out secondary cooling processing since self gravitation constantly falls, into water cooling region；It is described it is pre-warmed also Raw-gas constantly freely rises, and enters reduction section and carries out reduction treatment to miberal powder；Thus, the heat exchange processing in air-cooled region, both The preliminary cooling to hot reduzate is realized, and is conducive to be rapidly heated simultaneously after the reducing gas after preheating enters reduction section Reaction, takes full advantage of the heat of reduzate, reduces the energy expenditure of production process, reduces production cost.

Specific embodiment according to the present utility model, the reduction section, positioned at the middle part of reactor, for miberal powder to be carried out Direct-reduction, obtains reduzate and reduction tail gas.Heating system is equipped with the reduction section, makes reactor chats for producing Powder and reducing gas carry out the heat of reduction reaction.Preferably, the reducing gas enters via the bottom of the reduction section, institute Miberal powder is stated via the top of the reduction section to enter, two kinds of raw materials are impacted by convection current, are collided, be conducive between the two into Row comes into full contact with, and promotes miberal powder fully to be reduced；Obtained reduzate is since self gravitation constantly falls, via reduction section Bottom discharge to cooling section carry out cooling treatment；Obtained reduction tail gas constantly freely rises, and is arranged via the top of reduction section Go out, be then discharged into via the reduction offgas outlet positioned at reactor head side wall in wash cooling device.

The specific work process that miberal powder carries out reduction treatment in reduction section is as follows：Miberal powder via reactor head feed zone It is added in reactor, the reduction section in portion carries out reduction treatment in the reactor.Under the heat effect of heating system, reduction section Internal furnace temperature is higher（Preferably, the burner hearth of reduction section is heated system and is heated to 900-1200 DEG C）, be reduction reaction into Row provides advantage.Miberal powder freely falls to reduction section via reduction section, and reducing gas is preheated via cooling section（Also Raw-gas is preheated to 300-600 DEG C）Reduction section is freely risen to afterwards, and impact occurs in both by convection, fully Contact, chemically reacts, and obtains reduzate and reduction tail gas；Obtained reduzate since self gravitation constantly falls, Via the bottom discharge of reduction section cooling treatment is carried out to cooling section；Obtained reduction tail gas constantly freely rises, via reduction The top discharge of section, is then discharged into wash cooling device via the reduction offgas outlet positioned at reactor head side wall.Its In, the reaction mechanism of miberal powder and reducibility gas is：Me_xO_y+CO→Me+CO₂, Me_xO_y+H₂→Me+H₂O.Due to miberal powder particle diameter Small, heat transfer condition and reacting dynamics condition substantially improve between gas-solid, and reduction reaction can be completed in a few seconds, realize directly The quick production process of reduced iron.Further, step（2）In the burner hearth of reduction section be heated system and be heated to 900-1200 ℃。

（3）Product processing：Fall on cooling section under the hot reduzate, successively via air-cooled region reducing gas into The preliminary cooling treatment of row, the water-cooling wall in water cooling region are cooled down twice processing, reduzate after cooling are obtained, via reaction The discharge port of device enters discharge system；Meanwhile the reducing gas in the air-cooled region is carried out at preheating by hot reduzate Reduction section is risen to after reason and carries out reduction reaction with miberal powder, realizes energy exchange；The reduction tail gas rises to reduction tail gas and goes out Mouth discharge reactor, is handled to obtain unreacted reducing gas, by itself and new reducing gas via exhaust gas processing device One piece be passed through reduction gas storage tank in mix after again via air distribution plate be passed through reactor participate in reduction reaction, realize reduction tail gas Cycling and reutilization.

Specific embodiment according to the present utility model, the cooling section, positioned at the bottom of reactor, for being gone back to what is obtained Originate in thing and carry out cooling treatment.The cooling section includes the air-cooled region and water cooling region set gradually from top to bottom, right successively Obtained reduzate carries out cooling treatment.The air-cooled sections bottom is equipped with air distribution plate, for introducing reducing gas to hot Reduzate carries out preliminary cooling treatment, in order to react the hot reduzate of generation and have just enter into the room temperature in reactor Reducing gas carries out heat exchange processing, the reduzate and pre-warmed reducing gas tentatively cooled down；Wherein, it is described preliminary cold But reduzate carries out secondary cooling processing since self gravitation constantly falls, into water cooling region；It is described it is pre-warmed also Raw-gas constantly freely rises, and enters reduction section and carries out reduction treatment to miberal powder；Thus, the heat exchange processing in air-cooled region, both The preliminary cooling to hot reduzate is realized, and is conducive to be rapidly heated simultaneously after the reducing gas after preheating enters reduction section Reaction, takes full advantage of the heat of reduzate, reduces the energy expenditure of production process, reduces production cost.The water cooling area Domain is surrounded by water-cooling wall, the heat for reduzate in absorbing reaction device burner hearth；Wherein, water-cooling wall is water cooling region Important component, is distributed in reactor bottom surrounding, inside is flowing water or steam, for absorbing the heat of reduzate in burner hearth Amount, realizes the reducing temperature twice of reduzate.Specific embodiment according to the present utility model, the shape of the cooling section is from specific Limitation, as long as reduzate can be made smoothly to fall.Further, the cooling section is tapered, is conducive to reduzate Constantly fallen using self gravitation and carry out comprehensive cooling treatment.

Specific embodiment according to the present utility model, the miberal powder feed system is used for reactor conveying mineral powder, described Reduzate discharge system is used to the reduzate of reactor discharge carrying out output processing.The reduzate discharge system, Including drawing mechanism and storage bin, the drawing mechanism respectively with the storage bin and the discharge port of the quick reduction reactor Connection, is stored for reduzate after cooling in reactor to be transported storage bin via drawing mechanism.

The specific work process that miberal powder carries out cooling treatment in cooling section is as follows：Miberal powder reactor bottom cooling section into Row cooling treatment.The reduzate that reduction section obtains is hot reduzate, first, is carried out into air-cooled region at preliminary cooling Reason, i.e., described hot reduzate and just changed via air distribution plate even between the room temperature reducing gas in reactor Heat so that the temperature of hot reduzate is down to 600-900 DEG C, and at the same time, reducing gas is preheated to 300-600 DEG C；So Afterwards, processing is cooled down twice into water cooling region via the reduzate of preliminary cooling processing, i.e., is handled via preliminary cooling Heat exchange processing of reduzate when passing through water-cooling wall so that being distributed in the water-cooling wall of reactor bottom surrounding can effectively inhale The heat of reduzate in burner hearth is received, the reduzate that temperature is down to room temperature is obtained, realizes the reducing temperature twice of reduzate.Obtain Room temperature reduzate via reactor discharge port discharge.

Specific embodiment according to the present utility model, the also Primordial Qi system, including exhaust gas processing device and also Primordial Qi storage Tank, wherein, the exhaust gas processing device includes wash cooling device, compression set and decarbonization device, for being discharged to reactor Reduction tail gas handled, obtain unreacted reducing gas.The entrance of the wash cooling device and the quick reduction The reduction offgas outlet connection of reactor, the reduction tail gas for being discharged to reactor is washed, cooling treatment；The compression The entrance of device is connected with the outlet of the wash cooling device, for the gas discharged to wash cooling device to be compressed Processing；The entrance of the decarbonization device is connected with the outlet of the compression set, compressed for compression set to be discharged Gas carries out carbonization treatment, obtained unreacted reducing gas；Reducing gas outlet and the reduction of the decarbonization device The recycling reducing gas entrance connection of gas storage tank, the unreacted reducing gas for decarbonization device to be discharged are passed into described go back In Primordial Qi storage tank, mixed in the reduction gas storage tank with new reducing gas.Specific embodiment according to the present utility model, institute State also Primordial Qi system and further include reduction tail gas storage tank, the reacting gas of the entrance and the decarbonization device of the reduction tail gas storage tank Outlet connection, CO is rich in for obtain decarbonization device₂Reduction tail gas stored.Hereby it is achieved that to reducing tail gas Separated, obtain unreacted reducing gas and be discharged into reducing gas progress mixed processing in reduction tail gas storage tank and new, Reducing gas resource as reactor is laid in, and to ensure recycling for reduction tail gas, can be mitigated in whole system The burden of tail gas treatment device, effectively reduces the energy consumption of direct-reduction technique；And isolated is rich in CO₂Go back protocercal tail Gas, is passed into reduction tail gas storage tank and is stored, and reduces exhaust gas discharge, environmentally friendly.

Specific embodiment according to the present utility model, the reduction gas storage tank include reducing gas and export and recycle also Primordial Qi Body entrance, the recycling reducing gas entrance of the reduction gas storage tank is connected with the reducing gas outlet of the decarbonization device, described The reducing gas outlet of reduction gas storage tank is connected with the quickly reduction reactor, in the reduction tail gas of discharging reactor Unreacted reducing gas is obtained after handling via the exhaust gas processing device to be stored and collected, and realizes unreacted reduction Gas, which is again introduced into reactor, carries out reduction reaction, ensures the cycling and reutilization of reduction tail gas；Preferably, the also Primordial Qi storage The reducing gas outlet of tank is connected through also Primordial Qi air intake valve with the air distribution plate of the reactor, for going back Primordial Qi by unreacted Body carries out heat exchange via the air-cooled region of reactor.Further, the reduction gas storage tank further includes newly also Primordial Qi entrance, The new also Primordial Qi entrance of the reduction gas storage tank is connected with reduction device of air, for new also Primordial Qi to be passed through the also Primordial Qi storage Mixed in tank with unreacted reducing gas, and mixed reducing gas is subjected to heat friendship via the air-cooled region of reactor Change.

The course of work that the reduction tail gas is recycled is as follows：After quick reduction reactor completes reduction reaction, Discharge reduction tail gas.The reduction tail gas after reaction is participated in from reduction offgas outlet discharge, sequentially enters the progress of wash cooling device After wash cooling processing, compression set are compressed processing, decarbonization device carries out carbonization treatment, unreacted reducing gas is obtained With rich in CO₂Reduction tail gas；Wherein, what is obtained is rich in CO₂Reduction tail gas enter reduction tail gas storage tank be collected storage, Obtained unreacted reducing gas enters in reduction gas storage tank to be mixed with new reducing gas, again via also Primordial Qi intake valve Door, wind turbine are entered in reactor and reduced.Hereby it is achieved that being recycled to reduction tail gas, whole system can be mitigated The burden of tail gas treatment device in system, effectively reduces the energy consumption of direct-reduction technique.

Inventor has found that the utility model provides a kind of quick reduction reactor and water-cooled miberal powder, and quickly reduction is anti- System is answered, compared with gas-based shaft kiln, which can handle powdery miberal powder, produce direct reduced iron for powder ore, save The processes such as pelletizing, drying, roasting, whole technological process is simpler, and process is easily-controllable, simultaneously as powdered ore powder footpath is small, with Reducing gas contact area is big, and the chemical reaction rate between the two is accelerated, and increases feed throughput, in addition, quick reduction apparatus Using heat accumulation type radiant tube as heat source, the efficiency of heating surface is high, while can reduce the dustiness in reduction tail gas；Fluidized with reduction Bed is compared, and quick reduction reaction system need to only control combustion gas, air mass flow to control the temperature in reactor, easy to operate, together When can avoid in fluidized reduction method " bond defluidization " phenomenon caused by shut-down, can effectively reduce the quick reducing process of miberal powder Energy consumption, mitigate reduction tail gas treatment device burden；Reduction tail gas after reduction by cleaning dust cooling, gas compression, After carbonization treatment, wherein, what is obtained is rich in CO₂Reduction tail gas be sent into reduction tail gas storage tank, obtained unreacted reducing gas It is sent into reduction gas storage tank and is mixed with brand-new also Primordial Qi, hereby it is achieved that making full use of top gas, avoids wasting not anti- The reducibility gas answered.

Embodiment one

The quick restoring method of the present embodiment Iron Ore Powder, comprises the following steps：

1st, iron ore concentrate is added at the top of the quick reduction apparatus of Iron Ore Powder；

2nd, the iron ore concentrate Iron grade is 65%, and ratio of the mineral powder granular particle diameter less than 0.074mm is no less than 80%；

3rd, heat accumulation type radiant tube temperature is set to 950 DEG C in the quick reduction apparatus of Iron Ore Powder；

4th, it is rich in CO by what is obtained in reduction tail gas after dedusting, pressurization, decarburization₂Reduction tail gas and unreacted reduction Gas, rich in CO₂Reduction tail gas be sent into reduction tail gas storage tank, unreacted reducing gas be sent into reduction gas storage tank in and brand-new reduce Gas is mixed, and obtains mixing also Primordial Qi；

5th, CO volume fractions are 80%, H in the mixing also Primordial Qi₂Volume fraction is 15%；

6th, the mixing also Primordial Qi is passed through from the quick reduction apparatus bottom of Iron Ore Powder, realizes that reverse heat is handed over reduzate Change；

7th, the effect that Primordial Qi is subject to heat accumulation type radiant tube to heat in uphill process described also heats up, the iron with whereabouts Miberal powder is exchanged heat and is occurred reduction reaction, reduction offgas outlet discharge of the reduction tail gas through the quick reduction apparatus top of Iron Ore Powder Reaction unit；

8th, the metallization powder of reaction generation is discharged through the quick reduction apparatus bottom of Iron Ore Powder；

9th, the degree of metalization of the metallization powder iron is 95%.

Embodiment two

2nd, the iron ore concentrate Iron grade is 65%, and ratio of the mineral powder granular particle diameter less than 1mm is no less than 80%；

3rd, in the quick reduction apparatus of Iron Ore Powder, radiant tube is set to 900 DEG C in 1/3rd altitude range of top, and lower part three is divided Two altitude ranges in radiant tube temperature be set to 950 DEG C；

5th, CO volume fractions are 60%, H in the mixing also Primordial Qi₂Volume fraction is 30%；

7th, the also Primordial Qi is subject to the effect heating that heat accumulation type radiant tube heats, the Iron Ore Powder with whereabouts in uphill process Exchanged heat and reduction reaction occurs, reduction offgas outlet discharge of the reduction tail gas through the quick reduction apparatus top of Iron Ore Powder is reacted Device；

9th, the metallization powder degree of metalization is 95%.

The utility model is described in detail above, used herein principle and implementation of the embodiment to the application Mode is set forth, and the explanation of above example is only intended to help to understand the present processes and its core concept；Meanwhile For those of ordinary skill in the art, according to the thought of the application, have change in specific embodiments and applications Become part, in conclusion this specification content should not be construed as the limitation to the application.

In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description Point is contained at least one embodiment or example of the utility model.In the present specification, to the schematic table of above-mentioned term State and be necessarily directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be with Combine in an appropriate manner in any one or more of the embodiments or examples.In addition, without conflicting with each other, this area Technical staff can by the different embodiments or example described in this specification and different embodiments or exemplary feature into Row combines and combination.

Although the embodiment of the utility model has been shown and described above, it is to be understood that above-described embodiment is Exemplary, it is impossible to the limitation to the utility model is interpreted as, those of ordinary skill in the art are in the scope of the utility model It is interior above-described embodiment to be changed, changed, replaced and modification.

Claims

A kind of 1. quick reduction reactor, it is characterised in that including：The feed zone that sets gradually from top to bottom, reduction section and cold But section, is equipped with heating system in the reduction section, miberal powder and reducing gas in reactor is carried out reduction reaction for producing Heat；

The cooling section includes the air-cooled region and water cooling region set gradually from top to bottom, wherein, the air-cooled sections bottom Equipped with air distribution plate, preliminary cooling treatment is carried out to hot reduzate for introducing reducing gas；The surrounding in the water cooling region Equipped with water-cooling wall, the heat for reduzate in absorbing reaction device burner hearth.
A kind of 2. quick reduction reaction system of water-cooled miberal powder, it is characterised in that including：Quick reduction reactor, heating system With also Primordial Qi system, wherein,

The quick reduction reactor includes feed zone, reduction section and the cooling section set gradually from top to bottom, the reduction section In be equipped with the heating system, for producing the heat for making miberal powder and reducing gas in reactor carry out reduction reaction；

The cooling section includes the air-cooled region and water cooling region set gradually from top to bottom, wherein, the air-cooled sections bottom Equipped with air distribution plate, preliminary cooling treatment is carried out to hot reduzate for introducing reducing gas；The surrounding in the water cooling region Equipped with water-cooling wall, the heat for reduzate in absorbing reaction device burner hearth；

It is described also Primordial Qi system, including exhaust gas processing device and reduction gas storage tank, wherein, the exhaust gas processing device respectively with instead The reduction offgas outlet of device is answered to be connected with the reduction gas storage tank, the reduction tail gas for being discharged to reactor is handled, and is obtained To unreacted reducing gas；

The reduction gas storage tank is connected through also Primordial Qi air intake valve with air distribution plate；

The also Primordial Qi system further includes brand-new also Primordial Qi source of the gas, and it is new that the reduction gas storage tank is equipped with brand-new also Primordial Qi entrance connection System also Primordial Qi source of the gas.
A kind of 3. quick reduction reaction system of water-cooled miberal powder as claimed in claim 2, it is characterised in that the heating system Including multiple heat accumulation type radiant tubes, each heat accumulation type radiant tube is vertically disposed side by side in the reduction section；It is described to go back The side wall of former section is equipped with fuel gas inlet, air intake and the exhanst gas outlet being connected with the heat accumulation type radiant tube.
A kind of 4. quick reduction reaction system of water-cooled miberal powder as claimed in claim 2, it is characterised in that the also Primordial Qi system System further includes wind turbine, and the air inlet of the wind turbine is connected with the also Primordial Qi air intake valve, and gas outlet is connected with the air distribution plate, For mixing reducing gas to be passed through to the air-cooled region of the quick reduction reactor.
A kind of 5. quick reduction reaction system of water-cooled miberal powder as claimed in claim 4, it is characterised in that the also Primordial Qi system System further includes nitrogen air intake valve and nitrogen storage tank, and described nitrogen air intake valve one end is connected with the nitrogen storage tank, the other end It is connected with the air inlet of the wind turbine, carries out air displacement for controlling nitrogen to enter reactor, ensure to enter in reducing gas Whole system is in nonoxidizing atmosphere before reactor.
A kind of 6. quick reduction reaction system of water-cooled miberal powder as claimed in claim 2, it is characterised in that the vent gas treatment Device includes wash cooling device, compression set and decarbonization device, wherein, the wash cooling device connects with reduction offgas outlet Connect, the reduction tail gas for being discharged to reactor is washed, cooling treatment；The compression set and the wash cooling device Connection, for the gas discharged to wash cooling device to be compressed processing；The decarbonization device is filled with the compression respectively Put and connected with the reduction gas storage tank, for compressed gas to be carried out carbonization treatment, obtained unreacted reducing gas It is passed into the reduction gas storage tank and is mixed with new reducing gas；The also Primordial Qi system further includes reduction tail gas storage tank, with The decarbonization device connection, CO is rich in for obtain decarbonization device₂Reduction tail gas stored.
7. a kind of quick reduction reaction system of water-cooled miberal powder as claimed in claim 2, it is characterised in that further include input and output material System, including miberal powder feed system and reduzate discharge system, wherein, the miberal powder feed system includes raw material cabin, bucket carries, Upper gate valve, underthrust plate valve, material leakage cone and Vibrating Distribution Screen, wherein, the bucket carries to be connected with raw material cabin and reactor respectively, uses In from raw material cabin to reactor feeding；The upper gate valve, underthrust plate valve, material leakage cone and Vibrating Distribution Screen are set successively from top to bottom It is placed in the feed zone, is opened and closed by the alternating of the upper gate valve and underthrust plate valve, in charging to described anti- Device its top feed mouth is answered to be closed in turn；The reduzate discharge system, including drawing mechanism and storage bin, the discharging Device is connected with the discharge port of the quick reduction reactor and the storage bin respectively, for being gone back after cooling in reactor Original thing transports storage bin via drawing mechanism and is stored.