Summary of the invention
The present invention is intended to solve at least to a certain extent one of technical problem in correlation technique.For this reason, one object of the present invention is to propose a kind of gas-based shaft kiln and prepares the method for sponge iron and the system that gas-based shaft kiln is prepared sponge iron.Utilize the method and system can effectively reduce the energy consumption of gas-based shaft kiln directly reduced technique, reducing gas air-flow is distributed and uniformity of temperature profile, alleviate the burden of vertical furnace top gas sweetener, increase the carburizing amount of sponge iron, reduce several large subject matter in the existing gas-based shaft kiln directly reduced techniques such as energy consumption that melt division technique.
According to an aspect of the present invention, the present invention proposes a kind of method that gas-based shaft kiln is prepared sponge iron, comprising:
(1) in described gas-based shaft kiln, add acid pellet, wherein, described gas-based shaft kiln has reduction section and cooling section, and described reduction section is positioned at the top of described cooling section;
(2) the first reducing gas is carried to hydrogen and processed, to obtain hydrogen and rich CO (carbon monoxide converter) gas;
(3) the second reducing gas and described hydrogen are mixed and carry out heat treated, to obtain hot reducing gas;
(4) described hot reducing gas is delivered in described gas-based shaft kiln from described reduction section, made described hot reducing gas and described acid pellet generation reduction reaction, to obtain sponge iron and top gas;
(5) described rich CO (carbon monoxide converter) gas is delivered in described gas-based shaft kiln from described cooling section, to make described sponge iron in described rich CO (carbon monoxide converter) gas and described cooling section carry out heat exchange and carburization reaction enters described reduction section and carries out described reduction reaction on backward;
(6) the described top gas obtaining in step (4) is carried out respectively successively to wash cooling processing, processed compressed and desulfurization and decarburization and process, to obtain unreacted reducing gas;
(7) using the described unreacted reducing gas obtaining in step (6), described the first reducing gas in step (2) is carried hydrogen described in carrying out and is processed.
Therefore, the method of utilizing the above embodiment of the present invention gas-based shaft kiln to prepare sponge iron can effectively reduce the energy consumption of gas-based shaft kiln directly reduced technique, reducing gas air-flow is distributed and uniformity of temperature profile, alleviate the burden of vertical furnace top gas sweetener, increase the carburizing amount of sponge iron, reduce several large subject matter in the existing gas-based shaft kiln directly reduced techniques such as energy consumption that melt division technique.
In some embodiments of the invention, the method that above-mentioned gas-based shaft kiln is prepared sponge iron further comprises:
(8) using a part for the described unreacted reducing gas obtaining in step (6), described the first reducing gas in step (2) is carried hydrogen described in carrying out and is processed;
(9) carrying out step (3) before, another part of described unreacted reducing gas is being mixed with described the second reducing gas.
In some embodiments of the invention, in the described rich CO (carbon monoxide converter) gas obtaining in step (2), carbon monoxide content is not less than 70 volume %.
In some embodiments of the invention, the temperature that enters the described rich CO (carbon monoxide converter) gas of described reduction section in step (5) is 850~900 degrees Celsius.Can directly enter thus reduction section and carry out reduction reaction, can also improve the air temperature and current distribution consistency degree in reduction section, improve the quality of products.
The temperature of the described hot reducing gas obtaining in step (3) in some embodiments of the invention, is 900~1000 degrees Celsius.More traditionally thus reducing gas need to be heated to 1050~1200 degrees Celsius and more save energy consumption.
In some embodiments of the invention, in step (5), described rich CO (carbon monoxide converter) gas is delivered in described gas-based shaft kiln from the contiguous bottom of described cooling section.Can further improve thus and fully the contacting of sponge iron, to fully carry out heat exchange and carburization reaction.
According to a further aspect in the invention, the invention allows for the system that a kind of gas-based shaft kiln is prepared sponge iron, comprising:
Gas-based shaft kiln, described gas-based shaft kiln has opening for feed, discharge gate and top gas outlet, described gas-based shaft kiln has reduction chamber and is positioned at the cooling chamber of described reduction chamber below, and wherein, described reduction chamber has reducing gas import, described cooling chamber has cold gas import;
Carry hydrogen production device, described in carry hydrogen production device and there is inlet mouth, hydrogen outlet and the outlet of rich CO (carbon monoxide converter) gas, described rich CO (carbon monoxide converter) gas outlet is connected with the cold gas import of described cooling chamber;
Process furnace, carries described in described process furnace is arranged between hydrogen production device and described gas-based shaft kiln, and is connected with the reducing gas import of described hydrogen outlet and described reduction chamber respectively;
Wash cooling device, described wash cooling device is connected with described top gas outlet;
Compression set, described compression set is connected with described wash cooling device; And
Desulfurization and decarburization device, described desulfurization and decarburization device respectively with described compression set with described in carry hydrogen production device and be connected.
Therefore, the system of utilizing the above embodiment of the present invention gas-based shaft kiln to prepare sponge iron can effectively reduce the energy consumption of gas-based shaft kiln directly reduced technique, reducing gas air-flow is distributed and uniformity of temperature profile, alleviate the burden of vertical furnace top gas sweetener, increase the carburizing amount of sponge iron, reduce several large subject matter in the existing gas-based shaft kiln directly reduced techniques such as energy consumption that melt division technique.
In some embodiments of the invention, described desulfurization and decarburization device is connected with described process furnace.Can make full use of top gas thus, reduce the use of reducing gas, reduce energy consumption.
In some embodiments of the invention, the bottom of the contiguous described cooling chamber of described cold gas import.Can fully to sponge iron, carry out cooling thus.
Embodiment
Describe embodiments of the invention below in detail, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of identical or similar functions from start to finish.Below by the embodiment being described with reference to the drawings, be exemplary, be intended to for explaining the present invention, and can not be interpreted as limitation of the present invention.
The gas-based shaft kiln of describing the embodiment of the present invention below with reference to Fig. 1-2 is prepared the method for sponge iron.The method that gas-based shaft kiln is prepared sponge iron according to an embodiment of the invention comprises:
(1) in described gas-based shaft kiln, add acid pellet, wherein, gas-based shaft kiln has reduction section and cooling section, and reduction section is positioned at the top of cooling section;
(2) the first reducing gas is carried to hydrogen and processed, to obtain hydrogen and rich CO (carbon monoxide converter) gas;
(3) by the second reducing gas with hydrogen mixes and carry out heat treated, to obtain hot reducing gas;
(4) hot reducing gas is delivered in gas-based shaft kiln from reduction section, made hot reducing gas and acid pellet generation reduction reaction, to obtain sponge iron and top gas; And
(5) rich CO (carbon monoxide converter) gas is delivered in gas-based shaft kiln from cooling section, to make sponge iron in rich CO (carbon monoxide converter) gas and cooling section carry out heat exchange and carburization reaction enters reduction section and carries out reduction reaction on backward.
First, the present invention processes the rich CO (carbon monoxide converter) gas obtain and is delivered in gas-based shaft kiln as cooling gas from cooling section reducing gas being carried to hydrogen, and the rich CO (carbon monoxide converter) gas being simultaneously preheated enters in reduction section for reduction reaction.Because the carbon monoxide content in rich CO (carbon monoxide converter) gas is higher, according to a particular embodiment of the invention, in rich CO (carbon monoxide converter) gas, carbon monoxide content is not less than 70 volume %, and the specific heat capacity of carbon monoxide is H
21/10th, so cooling performance is better, CO (carbon monoxide converter) gas is more easily preheated.On the other hand, rich CO (carbon monoxide converter) gas in cooling section further with sponge iron generation carburization reaction, the carburization reaction of carbon monoxide is thermopositive reaction, is more beneficial to the preheating of cooling gas.Therefore, cooling gas is at shaft furnace cooling section after thermal sponge iron preheating, and temperature can reach 850~900 ℃, takes full advantage of the sensible heat of hot sponge iron, for energy consumption is saved in whole technical process.Because the temperature after cooling gas preheating is high, rich hydrogen reduction gas only need be heated to 900~1000 ℃, just can form the temperature field that acid pellet reduction requires in reduction shaft furnace section, has further reduced the energy consumption of whole technical process.Again on the one hand, owing to passing through the temperature of the rich CO (carbon monoxide converter) gas of sponge iron preheating, can reach 850~900 ℃, so can directly carry out reduction reaction after entering reduction section.And rich CO (carbon monoxide converter) gas is to enter reduction section from the little cooling section of diameter, can arrive hot reducing gas and be difficult for the reduction section central zone arriving, can make thus uniformity of temperature profile in reduction section, air-flow is evenly distributed, and is more beneficial to the control of quality product.
Secondly, due to the cooling gas that adopts rich CO (carbon monoxide converter) gas as cooling section, be more beneficial to sponge iron generation carburization reaction in cooling section, therefore can significantly improve the carbon content of sponge iron, can meet higher carbon containing requirement, thereby reduce follow-up molten divisional processing burden, reduce energy consumption.According to specific embodiment of the invention, in step (5), rich CO (carbon monoxide converter) gas is delivered in described gas-based shaft kiln from the contiguous bottom of cooling section.Can contact with sponge iron fully thus carburization reaction occurs, reduce the problem of sponge iron simultaneously, improve the temperature of carbon monoxide self.
The 3rd, due to the cooling gas that adopts rich CO (carbon monoxide converter) gas as cooling section, when improving sponge iron carbon content, consumed the carbon monoxide in more cold gas, and then can reduce the carbon monoxide content of the reducing gas in whole gas-based shaft kiln, can also utilize the katalysis of metallic iron in cooling section simultaneously, the methane gas in catalytic pyrolysis cold gas, and then gas is reformed, further improved the H of the reducing gas in reduction section
2/ CO ratio, finally improves reduction reaction efficiency.
Therefore, the method of utilizing the above embodiment of the present invention gas-based shaft kiln to prepare sponge iron can effectively reduce the energy consumption of gas-based shaft kiln directly reduced technique, reducing gas air-flow is distributed and uniformity of temperature profile, alleviate the burden of vertical furnace top gas sweetener, increase the carburizing amount of sponge iron, reduce several large subject matter in the existing gas-based shaft kiln directly reduced techniques such as energy consumption that melt division technique.
According to a particular embodiment of the invention, the first and second reducing gass in above-mentioned steps (2) and step (3) can be reformed gas and the gas maked coal of Sweet natural gas, coke-oven gas or coal-seam gas, H wherein
2be not less than 90 volume % with the total content of carbon monoxide.Utilize thus further reduction reaction efficiency of this reducing gas, to further improve efficiency and the productive rate of preparing cavernous body.According to a particular embodiment of the invention, entering what in reduction section, first carry out reduction reaction is the hot reducing gas of the mixing that contains the second reducing gas and hydrogen after heating, hydrogen wherein and carbon monoxide ratio are higher, can further improve reduction reaction efficiency thus.Through carrying hydrogen, process the rich CO (carbon monoxide converter) gas obtain and first enter after cooling section simultaneously, can consume part carbon monoxide with sponge iron generation carburization reaction, occur that high temperature carbon monoxide after carburization reaction and preheating can upwards enter in reduction section so with contain mixing of the second reducing gas and hydrogen hot reducing gas and again mix and carry out reduction reaction, because carburization reaction has consumed a part of carbon monoxide, and then make finally to enter H in the total reducing gas in reduction section
2being not less than under the prerequisite of 90 volume %, make H with the total content of carbon monoxide
2/ CO ratio is also improved, and then more contributes to improve reduction reaction efficiency.
According to a particular embodiment of the invention, in step (3), only the second reducing gas and hydrogen need be mixed and is heated to 900~1000 degrees Celsius and obtain hot reducing gas, and the temperature of traditional reducing gas for gas-based shaft kiln reduction reaction need to reach 1050~1200 degrees Celsius even higher, so the method that the gas-based shaft kiln of the above embodiment of the present invention is prepared sponge iron is saved energy consumption more.This is can reach 850~900 ℃ owing to passing through the temperature of the rich CO (carbon monoxide converter) gas of sponge iron preheating, after not only entering reduction section, can directly carry out reduction reaction, and rich CO (carbon monoxide converter) gas is to enter reduction section from the little cooling section of diameter, can arrive hot reducing gas and be difficult for the reduction section central zone arriving, can make thus uniformity of temperature profile in reduction section, air-flow is evenly distributed, reduction reaction is more easily carried out, therefore the temperature of the hot reducing gas of reduction section is without too high, and then significantly saves energy consumption.And traditional reducing gas is to enter from gas-based shaft kiln reduction section the central zone that be difficult to arrive reduction section, easily cause reaction not exclusively, quality product is wayward, therefore need to be heated to 1000 degrees Celsius with on improve reduction reaction degree.
As shown in Figure 1, according to a particular embodiment of the invention, above-mentioned gas-based shaft kiln is prepared in the method for sponge iron:
(6) top gas obtaining in step (4) is carried out respectively successively to wash cooling processing, processed compressed and desulfurization and decarburization and process, to obtain unreacted reducing gas.
(7) carrying out step (3) before, described in described the first reducing gas using the unreacted reducing gas obtaining in step (6) in step (2) carries out, carrying hydrogen and process.
Thus top gas is made full use of, unreacted reducing gas avoids waste.In addition, by the control to top gas decarburization link, making CO2 removal rate is 85%~95%, can avoid shaft furnace cooling section to analyse carbon in a large number and the pelletizing pulverizing problem that causes, and the height that reduces gaseous tension and absorption inner-tower filling material, has reduced production cost.
According to a particular embodiment of the invention, for compressor is normally worked, the temperature of top gas after wash cooling is processed is below 50 degrees Celsius.Common the first and second reducing gas temperature are also below 50 degrees Celsius.Therefore, the rich carbon monoxide gas temperature that enters cooling section is also below 50 degrees Celsius, and then can carry out cooling to the high-temperature sponge iron in cooling section.
According to a particular embodiment of the invention, the unreacted reducing gas obtaining in above-mentioned top gas can also be prepared to sponge iron for gas-based shaft kiln.Particularly, can unreacted reducing gas be filled in reduction section or in cooling section or fill into respectively in reduction section and cooling section.
As shown in Figure 2, according to a particular embodiment of the invention, the method that the gas-based shaft kiln of above-described embodiment is prepared sponge iron may further include:
(8) using a part for the described unreacted reducing gas obtaining in step (6), described the first reducing gas in step (2) is carried hydrogen described in carrying out and is processed;
(9) carrying out step (3) before, another part of described unreacted reducing gas is being mixed with described the second reducing gas.
Unreacted reducing gas can not carried to hydrogen as the first reducing gas in whole or in part thus and process, and then save the first reducing gas is additionally provided, and then the top gas producing in gas-based shaft kiln is made full use of, save energy consumption.
According to a particular embodiment of the invention, by using top gas through the carbon monoxide after carrying hydrogen and processing as cooling gas, can utilize the sponge iron in cooling section to remove the element sulphur in gas, alleviated the burden of gas sweetening unit in technique, not only reduce the production cost of technique, and improved the production efficiency of equipment.
According to a further aspect in the invention, the present invention proposes a kind of gas-based shaft kiln and prepare the system of sponge iron, the system that the gas-based shaft kiln of describing the embodiment of the present invention below with reference to Fig. 3-4 is prepared sponge iron comprises: gas-based shaft kiln 100, carry hydrogen production device 200, process furnace 300, wash cooling device 400, compression set 500 and desulfurization and decarburization device 600.
According to a particular embodiment of the invention, gas-based shaft kiln 100 has opening for feed 101, discharge gate 102 and top gas outlet 103, gas-based shaft kiln 100 has reduction chamber 110 and is positioned at the cooling chamber 120 of reduction chamber 110 belows, wherein, reduction chamber 110 has reducing gas import 104, cooling chamber has cold gas import 105; Carry hydrogen production device 200 and have inlet mouth 201, hydrogen outlet 202 and rich CO (carbon monoxide converter) gas outlet 203, the cold gas import 105 that rich CO (carbon monoxide converter) gas exports 203Yu cooling chamber is connected; And process furnace 300 is arranged on and carries between hydrogen production device 200 and gas-based shaft kiln 100, and be connected with the reducing gas import 104 of reduction chamber with hydrogen outlet 202 respectively.
First, gas-based shaft kiln is according to the abovementioned embodiments of the present invention prepared the system of sponge iron, can first utilize and carry hydrogen production device 200 and reducing gas is carried to hydrogen process rich CO (carbon monoxide converter) gas and the hydrogen obtain, and the contiguous bottom from gas-based shaft kiln cooling section is delivered in gas-based shaft kiln using rich CO (carbon monoxide converter) gas as cooling gas, the rich CO (carbon monoxide converter) gas being preheated in cooling section enters and in reduction section, continues on for reduction reaction.Carry hydrogen process obtain hydrogen and be together heated with reducing gas after for the reduction reaction in reduction section.Because the specific heat capacity of carbon monoxide is H
21/10th, therefore adopt and carry hydrogen production device to process the rich CO (carbon monoxide converter) gas obtaining better as the cooling performance of cooling gas, CO (carbon monoxide converter) gas is more easily preheated simultaneously.On the other hand, rich CO (carbon monoxide converter) gas also can be further and sponge iron generation carburization reaction in cooling section, and the carburization reaction of carbon monoxide is thermopositive reaction, is more beneficial to the preheating of cooling gas.Therefore, cooling gas is at shaft furnace cooling section after thermal sponge iron preheating, and temperature can reach 850~900 ℃, takes full advantage of the sensible heat of hot sponge iron, for energy consumption is saved in whole technical process.Because the temperature after cooling gas preheating is high, rich hydrogen reduction gas only need be heated to 900~1000 ℃, just can form the temperature field that acid pellet reduction requires in reduction shaft furnace section, has further reduced the energy consumption of whole technical process.Again on the one hand, owing to passing through the temperature of the rich CO (carbon monoxide converter) gas of sponge iron preheating, can reach 850~900 ℃, so can directly carry out reduction reaction after entering reduction section.And rich CO (carbon monoxide converter) gas is to enter reduction section from the little cooling section of diameter, can arrive hot reducing gas and be difficult for the reduction section central zone arriving, can make thus uniformity of temperature profile in reduction section, air-flow is evenly distributed, and is more beneficial to the control of quality product.
Secondly, employing is carried hydrogen production device and is processed the rich CO (carbon monoxide converter) gas obtain as the cooling gas of cooling section, more be beneficial to sponge iron generation carburization reaction in cooling section, therefore can significantly improve the carbon content of sponge iron, can meet higher carbon containing requirement, thereby reduce follow-up molten divisional processing burden, reduce energy consumption.
The 3rd, employing is carried hydrogen production device and is processed the rich CO (carbon monoxide converter) gas of the employing obtaining as the cooling gas of cooling section, when improving sponge iron carbon content, can consume the carbon monoxide in more cold gas, and then can reduce the carbon monoxide content of the reducing gas in whole gas-based shaft kiln, can also utilize the katalysis of metallic iron in cooling section simultaneously, the methane gas in catalytic pyrolysis cold gas, and then gas is reformed, further improved the H of the reducing gas in reduction section
2/ CO ratio, finally improves reduction reaction efficiency.
Therefore, the system of utilizing the above embodiment of the present invention gas-based shaft kiln to prepare sponge iron can effectively reduce the energy consumption of gas-based shaft kiln directly reduced technique, reducing gas air-flow is distributed and uniformity of temperature profile, alleviate the burden of vertical furnace top gas sweetener, increase the carburizing amount of sponge iron, reduce several large subject matter in the existing gas-based shaft kiln directly reduced techniques such as energy consumption that melt division technique.
As shown in Figure 3, the wash cooling device 400 that gas-based shaft kiln according to the above embodiment of the present invention is prepared in the system of sponge iron is connected with top gas outlet 103, compression set 500 wash cooling devices 400 are connected, and compression set 500 is connected with desulfurization and decarburization device 600.By said apparatus, can purify the top gas from reduction section 110 interior discharges with desulfurization and decarburization and process thus, and then obtain unreacted reducing gas.According to a particular embodiment of the invention, the unreacted reducing gas that desulfurization and decarburization device can also be discharged is proposed hydrogen processing described in the first reducing gas carries out.
According to a particular embodiment of the invention, desulfurization and decarburization device 600 can also with carry hydrogen production device 200 and be connected, and then the unreacted reducing gas that desulfurization and decarburization device is discharged is carried hydrogen as the first reducing gas and is processed.Or unreacted reducing gas is filled into and carries hydrogen production device 200, through carrying the hydrogen that obtains after hydrogen is processed and carbon monoxide, be respectively used to reduction reaction in reduction section 110 and the cooling and carburization reaction of the sponge iron in cooling section 120.By making full use of unreacted reducing gas in top gas, can save partial reduction gas thus, save energy consumption, reduce costs.
As shown in Figure 4, according to a particular embodiment of the invention, desulfurization and decarburization device 600 can also be respectively with process furnace 300 with carry hydrogen production device 200 and be connected.And then unreacted reducing gas can be filled into respectively to process furnace 300 and carry hydrogen production device 200, make full use of thus unreacted reducing gas in top gas and can save partial reduction gas, save energy consumption, reduce costs.
According to a particular embodiment of the invention, when desulfurization and decarburization device 600 is when carrying hydrogen production device 200 and be connected, and top gas is when unreacted reducing gas is abundant after treatment, unreacted reducing gas can be delivered to carry and in hydrogen production device 200, carry hydrogen and process, without hydrogen production device 200 is interior additionally supplements reducing gas to carrying again, and then can significantly save energy consumption.
According to a particular embodiment of the invention, the bottom of cold gas import 105 contiguous cooling chamber 120.Can enter the contiguous bottom from cooling chamber 120 rich CO (carbon monoxide converter) gas as cold gas thus, can, so that sponge iron can contact with carbon monoxide fully, improve cooling performance and carburizing effect thus.
Embodiment 1
As shown in figures 1 and 3, fresh reducing gas is passed into gas heating stove and be heated to 900~1000 degrees Celsius, then from the bustle pipe of reduction shaft furnace section bottom, enter in reduction shaft furnace section and carry out reduction reaction with the acid pellet entering from shaft furnace top, obtain sponge iron and produced top gas, sponge iron enters cooling section, and the top gas of generation is discharged from the outlet of vertical furnace top gas.
The top gas of discharge is carried out after wash cooling processing, processed compressed and desulfurization and decarburization are processed obtaining unreacted reducing gas, unreacted reducing gas is carried to hydrogen to be processed, obtain respectively hydrogen and rich CO (carbon monoxide converter) gas, hydrogen wherein and fresh reducing gas are together passed into gas heating stove and heat.Rich CO (carbon monoxide converter) gas is from passing into shaft furnace cooling section bottom, carry out heat exchange with hot sponge iron, and sponge iron is cooled to, below 50 ℃, carry out carburization reaction and consume a part of carbon monoxide in shaft furnace cooling section, sponge iron can also remove the element sulphur in rich CO (carbon monoxide converter) gas simultaneously.This part rich CO (carbon monoxide converter) gas is heated to 850~900 degrees Celsius in the cooling section of shaft furnace, and continuation upwards flows into reduction section, and the rich hydrogen thermal reduction gas entering with bustle pipe in reduction section mixes, common reduction-oxidation pelletizing, the rich CO (carbon monoxide converter) gas that enters reduction section from cooling section can arrive the central zone of reduction section, and then can be so that the air temperature and current in reduction section is evenly distributed, reduction reaction is easily carried out.
Embodiment 2
As shown in Figure 2 and Figure 4, fresh reducing gas is divided into two portions, a part is carried hydrogen production device through gas, this part gas is divided into hydrogen and rich CO (carbon monoxide converter) gas, another part of hydrogen wherein and fresh reducing gas is together passed into gas heating stove and be heated to 900~1000 degrees Celsius, then from the bustle pipe of reduction shaft furnace section bottom, enter in reduction shaft furnace section and carry out reduction reaction with the acid pellet entering from shaft furnace top.Rich CO (carbon monoxide converter) gas, from passing into shaft furnace cooling section bottom, is carried out heat exchange with hot sponge iron, and sponge iron is cooled to, below 50 ℃, carry out carburization reaction simultaneously and consume a part of carbon monoxide in shaft furnace cooling section.This part rich CO (carbon monoxide converter) gas is heated to 850~900 degrees Celsius in the cooling section of shaft furnace, and continuation upwards flows into reduction section, and the rich hydrogen thermal reduction gas entering with bustle pipe in reduction section mixes, common reduction-oxidation pelletizing, the rich CO (carbon monoxide converter) gas that enters reduction section from cooling section can arrive the central zone of reduction section, and then can be so that the air temperature and current in reduction section is evenly distributed, reduction reaction is easily carried out.
The top gas producing in reduction section is discharged from the outlet of vertical furnace top gas.The top gas of discharge is carried out after wash cooling processing, processed compressed and desulfurization and decarburization are processed obtaining unreacted reducing gas, unreacted reducing gas is passed into respectively to process furnace and carries in hydrogen production device, to be respectively used to the reduction reaction in reduction section and the sponge iron in cooling section is carried out to cooling process.Saved the fresh reducing gas of part.
In description of the invention, it will be appreciated that, term " " center ", " longitudinally ", " laterally ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", " counterclockwise ", " axially ", " radially ", orientation or the position relationship of indications such as " circumferentially " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, rather than device or the element of indication or hint indication must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as limitation of the present invention.
In addition, term " first ", " second " be only for describing object, and can not be interpreted as indication or hint relative importance or the implicit quantity that indicates indicated technical characterictic.Thus, one or more these features can be expressed or impliedly be comprised to the feature that is limited with " first ", " second ".In description of the invention, the implication of " a plurality of " is two or more, unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, the terms such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and for example, can be to be fixedly connected with, and can be also to removably connect, or be integral; Can be mechanical connection, can be to be also electrically connected to; Can be to be directly connected, also can indirectly be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements.For the ordinary skill in the art, can understand as the case may be above-mentioned term concrete meaning in the present invention.
In the present invention, unless otherwise clearly defined and limited, First Characteristic Second Characteristic " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary indirect contact.And, First Characteristic Second Characteristic " on ", " top " and " above " but First Characteristic directly over Second Characteristic or oblique upper, or only represent that First Characteristic level height is higher than Second Characteristic.First Characteristic Second Characteristic " under ", " below " and " below " can be First Characteristic under Second Characteristic or tiltedly, or only represent that First Characteristic level height is less than Second Characteristic.
In the description of this specification sheets, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present invention or example in conjunction with specific features, structure, material or the feature of this embodiment or example description.In this manual, to the schematic statement of above-mentioned term needn't for be identical embodiment or example.And, the specific features of description, structure, material or feature can one or more embodiment in office or example in suitable mode combination.In addition,, not conflicting in the situation that, those skilled in the art can carry out combination and combination by the feature of the different embodiment that describe in this specification sheets or example and different embodiment or example.
Although illustrated and described embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, and those of ordinary skill in the art can change above-described embodiment within the scope of the invention, modification, replacement and modification.