CN209292387U - The preparation system of reducing gas for shaft furnace - Google Patents
The preparation system of reducing gas for shaft furnace Download PDFInfo
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- CN209292387U CN209292387U CN201822180908.1U CN201822180908U CN209292387U CN 209292387 U CN209292387 U CN 209292387U CN 201822180908 U CN201822180908 U CN 201822180908U CN 209292387 U CN209292387 U CN 209292387U
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Abstract
The utility model provides a kind of preparation system of reducing gas for shaft furnace, includes at least hydrogen generating device, airflow bed gasification furnace, heat exchanger, mixer, the first cooling, purifying equipment and the second cooling, purifying equipment.The utility model couples direct reduced iron hydrogen manufacturing using high-temperature gasification synthesis gas, low in cost without using expensive catalyst, the thermal efficiency is high, and it is heated hydrogen using heat exchanger by the heat transfer of the synthesis gas of high temperature to hydrogen without CO converting means, so that the sensible heat for the high temperature and pressure synthesis gas that gasification furnace generates is fully used, it with the cooling, desulfurizing decarburization of traditional handicraft elder generation, then converts heating and compares, save investment, energy consumption is significantly reduced, and reduces operating cost.
Description
Technical field
The utility model relates to technical field of ferrous metallurgy, in particular to a kind of preparation system of reducing gas for shaft furnace.
Background technique
Blast furnace iron-making process is combined together with converter, forms that efficiency is very high, and huge Steel Production Flow Chart is
The main force of steel production in the world.But due to its long flow path, energy consumption is high, pollution weight, needs the features such as consuming coke, development space
It is gradually restricted, countries in the world start to turn to non-blast furnace steel-making technology, develop using steel scrap and direct reduced iron as the electricity of raw material
Furnace mini-mill steelmaking technology is a kind of environmental-friendly and resource-conserving steel-smelting technology.In the art, direct reduced iron can
It is especially big in the market demand of European and American developed countries to dilute the impurity such as carbon present in steel scrap, copper, manganese, zinc.The world is first at present
Into direct reduced iron technology be gas-based shaft kiln directly reduced technology, the technology is mainly using natural gas as raw material, transformed Cheng Fu
After the gas of H2 and CO, solid state reduction directly occurs under the high temperature conditions with iron ore, produces sponge iron (direct reduced iron).By
In China's natural gas scarcity of resources, develops gas-based shaft kiln reduction technique and be restricted.The coal resources relative abundance in China, development
Coal Gasification gas is the preferred technology path to tally with the national condition for gas-based shaft kiln production sponge iron, is to be suitble to China's hair
Open up the important directions of novel ironmaking technology.
In general, requirement of the shaft kiln directly reduced ironmaking to also Primordial Qi is H2It is greater than 90% with the total volume fraction of CO,
φ (H2)/φ (CO) is 1.0~4.0, and pressure is 0.15Mpa~0.60Mpa.Existing coal gasifying process cannot be provided directly
The gas component met the requirements needs CO conversion equipment to carry out regulating gas component, and generally existing gasification furnace pressure is high, to raw material
It is required that the deficiencies of harsh, gas processed is at high cost, energy consumption is high.To meet the requirement of also Primordial Qi, current gasification technology, using fixation
Bed or fluidized bed are required to pure oxygen gasification, mating decarburization, and CO conversion equipment needs first to cool down and heat up again, causes energy waste, energy
Consumption is high.Entrained flow bed gasification technology furnace temperature is high, the CO+H of generation2> 90%, it is not required to mating decarbonation appliance, it is only necessary to mating CO transformation
Equipment equally causes the waste and high energy consumption of the energy to improve the content of hydrogen.
Utility model content
The purpose of the utility model is to provide a kind of preparations of reducing gas for shaft furnace that can be reduced energy consumption and rationally utilize heat
System.
A kind of in order to achieve the above object, the utility model provides preparation system of reducing gas for shaft furnace, includes at least:
Hydrogen generating device, with synthesis gas import, vapor import, direct reduced iron entrance and hydrogen exhaust mouth；
Airflow bed gasification furnace, with synthesis gas exhaust outlet；
Heat exchanger, with synthesis gas entrance, syngas outlet, hydrogen inlet and hydrogen outlet, the synthesis gas entrance
It is connected with the synthesis gas exhaust outlet, the hydrogen inlet is connected with the hydrogen exhaust mouth；
Mixer, with first entrance, second entrance and also Primordial Qi outlet, the hydrogen outlet and the first entrance
It is connected；
First cooling, purifying equipment enters with third entrance, purified synthesis gas outlet and steam outlet, the third
Mouthful be connected with the syngas outlet, the purified synthesis gas outlet pass through two connecting lines respectively with the second entrance and
The synthesis gas import is connected, and the vapor outlet is connected with the vapor import；
Second cooling, purifying equipment, with top gas entrance and top gas purge outlet, the top gas purge outlet
It is connected with the first entrance.
The preparation system of reducing gas for shaft furnace as described above, wherein the hydrogen generating device includes:
First reactor is equipped with first charging aperture, the first discharge port, the synthesis gas import and discharge outlet, the row
Mouth is put to be in communication with the outside；
Second reactor is equipped with the direct reduced iron entrance, second charging aperture, the second discharge port, the vapor
Import and the hydrogen exhaust mouth, the second charging aperture are connected with first discharge port, second discharge port and institute
First charging aperture is stated to be connected.
The preparation system of reducing gas for shaft furnace as described above, wherein between the hydrogen exhaust mouth and the hydrogen inlet
Equipped with condenser.
The preparation system of reducing gas for shaft furnace as described above, wherein the first reactor be moving-burden bed reactor or
Fluidized-bed reactor, the second reactor are moving-burden bed reactor or fluidized-bed reactor.
The preparation system of reducing gas for shaft furnace as described above, wherein the first cooling, purifying equipment includes being sequentially communicated
Waste heat boiler, dust-extraction unit and desulfurizer, the waste heat boiler is shell-and-tube heat exchanger, the steam outlet and described
Third entrance is arranged on the waste heat boiler, and the outlet of the desulfurizer is by two connecting lines respectively with described the
Two entrances are connected with the synthesis gas import.
The preparation system of reducing gas for shaft furnace as described above, wherein the second cooling, purifying equipment includes being sequentially communicated
Washer and purification device, the top gas entrance is arranged on the washer, the outlet of the purification device with it is described
First entrance is connected.
The preparation system of reducing gas for shaft furnace as described above, wherein the purification device includes that the gas being sequentially communicated adds
The import of pressure device and desulfurization and decarburization device, the gas pressurized device is connected with the washer, the desulfurization and decarburization dress
The outlet set is connected with the first entrance.
The preparation system of reducing gas for shaft furnace as described above, wherein the preparation system of the reducing gas for shaft furnace further includes erecting
Furnace, the shaft furnace include furnace body, the furnace body be equipped with iron ore entrance, top gas outlet, also Primordial Qi entrance and directly
Reduced iron outlet, the top gas outlet are connected with the top gas entrance, and the also Primordial Qi entrance goes out with the also Primordial Qi
Mouth is connected, and the direct reduced iron entrance can be exported with the direct reduced iron be connected.
Compared with prior art, as follows the advantages of the utility model:
The preparation system of reducing gas for shaft furnace provided by the utility model couples direct reduced iron using high-temperature gasification synthesis gas
Hydrogen manufacturing, component is adjustable, low in cost without using expensive catalyst, and the thermal efficiency is high, and is not necessarily to CO converting means, utilizes
The heat transfer of the synthesis gas of high temperature to hydrogen is heated hydrogen by heat exchanger, so that the high temperature that gasification furnace generates is high
The sensible heat for being pressed into gas is fully used, and traditional handicraft elder generation cooling, desulfurizing decarburization, then is converted heating and compared, and throwing is saved
Money, significantly reduces energy consumption, and reduce operating cost.
Detailed description of the invention
Following drawings are only intended to schematically illustrate and explain the present invention, does not limit the model of the utility model
It encloses.Wherein:
Fig. 1 is the structural schematic diagram of the preparation system of the reducing gas for shaft furnace of the utility model.
Drawing reference numeral explanation:
1, hydrogen generating device；
11, first reactor；111, first charging aperture；112, the first discharge port；113, synthesis gas import；114, it discharges
Mouthful；
12, second reactor；121, direct reduced iron entrance；122, second charging aperture；123, the second discharge port；124, water
Steam-gas inlet；125, hydrogen exhaust mouth；
13, condenser；
2, airflow bed gasification furnace；21, synthesis gas exhaust outlet；
3, heat exchanger；31, synthesis gas entrance；32, syngas outlet；33, hydrogen inlet；34, hydrogen outlet；
4, mixer；41, first entrance；42, second entrance；43, also Primordial Qi outlet；
5, the first cooling, purifying equipment；51, waste heat boiler；511, third entrance；512, steam outlet；52, dedusting fills
It sets；53, desulfurizer；531, purified synthesis gas exports；
6, the second cooling, purifying equipment；61, washer；611, top gas entrance；62, purification device；621, top gas is net
Dissolve mouth；
7, shaft furnace；71, furnace body；711, iron ore entrance；712, top gas exports；713, Primordial Qi entrance is gone back；714, straight
Connect reduced iron outlet.
Specific embodiment
In order to have clearer understanding to the technical solution of the utility model, purpose and effect, now in conjunction with Detailed description of the invention sheet
The specific embodiment of utility model.
As shown in Figure 1, the utility model provides a kind of preparation system of reducing gas for shaft furnace, includes at least hydrogen and generate
Equipment 1, airflow bed gasification furnace 2, heat exchanger 3, mixer 4, the first cooling, purifying equipment 5 and the second cooling, purifying equipment 6,
In, hydrogen generating device 1 has synthesis gas import 113, vapor import 124, direct reduced iron entrance 121 and hydrogen exhaust mouth
125, hydrogen generating device 1 can generate hydrogen by chemical reaction；Airflow bed gasification furnace 2 has synthesis gas exhaust outlet 21, gas
Fluidized gas producer 2 is the prior art, and details are not described herein for specific structure；There is heat exchanger 3 synthesis gas entrance 31, synthesis gas to go out
Mouth 32, hydrogen inlet 33 and hydrogen outlet 34, specifically, heat exchanger 3 is shell-and-tube heat exchanger, hydrogen inlet 33 and hydrogen outlet
34 are arranged in the both ends of the heat-transfer pipe of heat exchanger 3, and the shell of heat exchanger 3 is arranged in synthesis gas entrance 31 and syngas outlet 32
Two sides, synthesis gas entrance 31 are connected with synthesis gas exhaust outlet 21, and hydrogen inlet 33 is connected with hydrogen exhaust mouth 125, synthesis
The heat of gas can pass to the hydrogen of hydrogen generating device generation in heat exchanger 3, and hydrogen is heated；Mixer 4 has the
One entrance 41, second entrance 42 and also Primordial Qi outlet 43, hydrogen outlet 34 is connected with first entrance 41；First cooling, purifying is set
Standby 5 have third entrance 511, purified synthesis gas outlet 531 and steam outlet 512, third entrance 511 and syngas outlet 32
It is connected, purified synthesis gas outlet 531 is connected with second entrance 42 and synthesis gas import 113 respectively by two connecting lines,
Vapor outlet is connected with vapor import 124, and the first cooling, purifying equipment 5 can be cooled down twice place to synthesis gas
Reason, and the heat generation vapor of absorption, the vapor of generation can be transported to 1 hydrogen making of hydrogen generating device,
Meanwhile first cooling, purifying equipment 5 can filter the impurity in synthesis gas；Second cooling, purifying equipment 6 has top gas entrance 611
With top gas purge outlet 621, top gas purge outlet 621 is connected with first entrance 41, and the second cooling, purifying equipment 6 can
Cooling, purifying processing is carried out to top gas, the hydrogen after top gas, purified synthesis gas and heating after cooling, purifying is mixed
It carries out being mixed to form reducing gas for shaft furnace in clutch 4.
When in use, it is passed through top gas to the second cooling, purifying equipment 6, top gas is 300 DEG C~500 DEG C of temperature of hydrogen-rich
Gas, top gas is via the synthesis generated after 6 cooling, purifying of the second cooling, purifying equipment into mixer 4, airflow bed gasification furnace 2
Gas is introduced into heat exchanger 3, enters the first cooling, purifying equipment 5 after exchanging heat with hydrogen, cools down via the first cooling, purifying equipment 5
Synthesis gas a part of purified treatment enters mixer 4, and another part enters hydrogen generating device 1, and the first cooling, purifying
The vapor that the heat that equipment 5 absorbs synthesis gas generates also enters hydrogen generating device 1, is passed through directly to hydrogen generating device 1
Reduced iron, the temperature of direct reduced iron are 550 DEG C~800 DEG C, and direct reduced iron, vapor and synthesis gas are generated in hydrogen and filled
The reaction for setting interior generation is as follows:
Fe3O4+ 4CO=3Fe+4CO2, △ H=-13kJ/mol；
Fe3O4+4H2=3Fe+4H2O, △ H=151kJ/mol；
3Fe+4H2O=Fe3O4+4H2, △ H=-151kJ/mol；
The hydrogen of generation is passed through mixer 4 after exchanging heat via heat exchanger 3, and direct reduced iron is as iron-based oxygen carrier in hydrogen
Circular response in generating means, generate pure hydrogen, and direct reduced iron efficiency reduce after, can add fresh direct reduced iron into
Row replacement, treated that synthesis gas mixes in mixer 4 for hydrogen after purified top gas, heating and cooling, purifying, passes through
Reducing gas for shaft furnace is formed after overregulating temperature and component.
The preparation system of reducing gas for shaft furnace provided by the utility model couples direct reduced iron using high-temperature gasification synthesis gas
Hydrogen manufacturing, low in cost without using expensive catalyst, the thermal efficiency is high, and is not necessarily to CO converting means, will be high using heat exchanger
The heat transfer of the synthesis gas of temperature is heated hydrogen to hydrogen, so that the high temperature and pressure synthesis gas that gasification furnace generates
Sensible heat is fully used, and traditional handicraft elder generation cooling, desulfurizing decarburization, then is converted heating and compared, and is saved investment, is greatly reduced
Energy consumption, and reduce operating cost.
In a kind of preferred embodiment of the utility model, as shown in Figure 1, hydrogen generating device 1 includes first anti-
Answer device 11 and second reactor 12, in which:
First reactor 11 is equipped with first charging aperture 111, the first discharge port 112, synthesis gas import 113 and discharge outlet 114,
Discharge outlet 114 is in communication with the outside, the CO of generation2And H2O is discharged after collecting by discharge outlet 114；Second reactor 12 is equipped with direct
Reduced iron entrance 121, second charging aperture 122, the second discharge port 123, vapor import 124 and hydrogen exhaust mouth 125, second into
Material mouth 122 is connected with the first discharge port 112, and the second discharge port 123 is connected with first charging aperture 111, in first reactor
The reaction occurred in 11 are as follows: Fe3O4+ 4CO=3Fe+4CO2, △ H=-13kJ/mol；Fe3O4+4H2=3Fe+4H2O, △ H=
151kJ/mol；The reaction occurred in second reactor 12 are as follows: 3Fe+4H2O=Fe3O4+4H2, △ H=-151kJ/mol, i.e.,
Direct reduced iron is reacted with vapor generates H2And Fe3O4, Fe generated3O4It is transported in first reactor 11 and synthesis gas
CO、H2Reaction generates Fe (including part FeO) and CO2、H2O, Fe (part FeO), which come back in second reactor 12, to be occurred instead
Hydrogen making is answered, such circular response generates pure hydrogen, low in cost.
It should be noted that determining to be passed through into first reactor 11 according to the amount of the hydrogen lacked in detection mixer 4
Synthesis gas amount so that hydrogen generating device generate hydrogen meet need to be made in mixer 4 reducing gas for shaft furnace lack
The amount of few hydrogen can be at the also Primordial Qi outlet 43 of mixer 4 for the ease of the constituent of gas in detection mixer 4
Detection device is set.
Further, moisture influences the product of manufactured reducing gas for shaft furnace in the hydrogen generated in order to avoid hydrogen generating device
Matter is equipped with condenser 13 between hydrogen exhaust mouth 125 and hydrogen inlet 33, removes the water in hydrogen by condenser 13, makes
Obtaining the hydrogen entered in mixer 4 is dry gas, to ensure the quality of manufactured reducing gas for shaft furnace.
Further, first reactor 11 is moving-burden bed reactor or fluidized-bed reactor, and first reactor 11 is mainly sent out
Raw reduction reaction, reaction temperature are 600 DEG C~900 DEG C, and second reactor 12 is moving-burden bed reactor or fluidized-bed reactor,
Oxidation reaction mainly occurs for second reactor 12, and reaction temperature is 550 DEG C~850 DEG C, and oxidation reaction is exothermic reaction, and is inputted
Direct reduced iron can provide heat for oxidation reaction.
Further, the first cooling, purifying equipment 5 includes waste heat boiler 51, dust-extraction unit 52 and the desulfurizer being sequentially communicated
53, waste heat boiler 51 is shell-and-tube heat exchanger, and steam outlet 512 and third entrance 511 are arranged on waste heat boiler 51, waste heat
It is water in the heat-transfer pipe of boiler 51, synthesis gas is passed through in the shell of waste heat boiler 51 by third entrance 511, will by synthesis gas
Water in the heat-transfer pipe of waste heat boiler 51 is heated into vapor, the outlet of the shell of the import and waste heat boiler 51 of dust-extraction unit 52
Connection, the outlet of dust-extraction unit 52 is connected with the entrance of desulfurizer 53, is filtered by dust-extraction unit 52 to synthesis gas
Dust removal process, dust-extraction unit 52 can use any device that dust removal process can be filtered to synthesis gas in the prior art,
Therefore, details are not described herein for the specific structure of dust-extraction unit 52, and the outlet of desulfurizer 53 is by two connecting lines respectively with the
Two entrances 42 are connected with synthesis gas import 113, and synthesis gas a part through desulfurization process enters mixing by a connecting line
Device 4, another part enter first reactor 11 by another connecting line and recycle hydrogen making, specifically, using dry desulfurization,
Desulfurizing agent FeO or ZnO progress desulfurization are added in desulfurizer 53, and lye is added in desulfurizer 53 using wet desulphurization,
The sulphur in synthesis gas is absorbed by lye.
Further, the second cooling, purifying equipment 6 includes the washer 61 and purification device 62 being sequentially communicated, top gas entrance
611 are arranged on washer 61, carry out washing cooling dust removal process, the outlet of purification device 62 to top gas by washer 61
It is connected with first entrance 41, desulfurization and decarburization processing is carried out by the top gas after 62 pairs of the purification device dust removal process that cool down, with
So that the top gas into mixer 4 is purer, to ensure the quality of manufactured reducing gas for shaft furnace.
Further, purification device 62 includes the gas pressurized device and desulfurization and decarburization device being sequentially communicated, gas pressurized dress
The import set is connected with the outlet of washer 61, and the outlet of gas pressurized device is connected with the import of desulfurization and decarburization device,
The outlet of desulfurization and decarburization device is connected with first entrance 41, specifically, adding MDEA in desulfurization and decarburization device
(methyldiethanolamine, methyl diethanolamine) solution, the sulphur and carbon being mixed in top gas can be inhaled by MDEA solution
It receives.
In a kind of embodiment of the utility model, the preparation system of reducing gas for shaft furnace further includes shaft furnace 7, and shaft furnace 7 wraps
Furnace body 71 is included, furnace body 71 is equipped with iron ore entrance 711, top gas outlet 712, also Primordial Qi entrance 713 and direct-reduction
Iron outlet 714, iron ore entrance 711 are located at the top of furnace body 71, and direct reduced iron outlet 714 is located at the bottom of furnace body 71
Portion, top gas outlet 712 and also Primordial Qi entrance 713 are from top to bottom set to iron ore entrance 711 and direct reduced iron outlet 714
Between, top gas outlet 712 is connected with top gas entrance 611, and also Primordial Qi entrance 713 is connected with also Primordial Qi outlet 43, directly
It connects reduced iron entrance 121 to be connected with direct reduced iron outlet 714, shaft furnace 7 is preferably using including Midrex (Mead Simon Rex)
With the gas-based shaft kiln of the forms such as HYL (Xi Er), specific structure is that the prior art is identical, and details are not described herein, when in use, iron
Ore enters from furnace iron ore entrance 711, wherein iron ore is pelletizing or lump ore, and reducing gas for shaft furnace flows from bottom to top, is occurred
The reduction reaction of iron ore, obtains direct reduced iron and top gas by 850 DEG C~1000 DEG C of reaction temperature, and the top gas of generation is
The hydrogen-rich gas that 300 DEG C~500 DEG C of temperature, the temperature of direct reduced iron are 550 DEG C~800 DEG C, the direct-reduction that shaft furnace 7 generates
Iron can directly input second reactor 12 as oxygen carrier by pipeline, low in cost, and the reduction shaft furnace that mixer 4 generates
Gas can be passed directly into shaft furnace 7 by also Primordial Qi entrance 713 and carry out reaction preparing direct reduced iron.
It should be noted that in the preparation system of above-mentioned reducing gas for shaft furnace, between all parts preferably using pipeline into
Row connection.
The use process of the preparation system of reducing gas for shaft furnace provided by the utility model is illustrated with reference to the accompanying drawing:
As shown in Figure 1, when in use, the temperature that shaft furnace 7 generates is passed through for the top gas of 300 DEG C~500 DEG C of hydrogen-rich
Second cooling, purifying equipment 6, top gas via the second cooling, purifying equipment 6 cool down dust-removal and desulfurizing carbonization treatment after enter mixer
4, the synthesis gas that airflow bed gasification furnace 2 generates is introduced into heat exchanger 3, enters the first cooling, purifying equipment 5 after exchanging heat with hydrogen,
Via 5 reducing temperature twice of the first cooling, purifying equipment and dust-removal and desulfurizing, treated that a part of synthesis gas enters mixer 4, another
Partially synthetic gas enters first reactor 11, and the vapor that the heat of the absorption synthesis gas of waste heat boiler 51 generates enters second
Reactor 12, while second reactor 12 is passed through the direct reduced iron that the temperature of the generation of shaft furnace 7 is 550 DEG C~800 DEG C, directly also
Former iron is reacted with what vapor occurred in second reactor 12 are as follows: 3Fe+4H2O=Fe3O4+4H2, △ H=-151kJ/mol,
By the Fe of generation3O4It is delivered to first reactor 11, Fe3O4It is reacted with what synthesis gas occurred in first reactor 11 are as follows: Fe3O4
+ 4CO=3Fe+4CO2, △ H=-13kJ/mol；Fe3O4+4H2=3Fe+4H2O, △ H=151kJ/mol；By (the portion Fe of generation
Divide FeO) it is passed through first reactor 11, so that first reactor 11 and second reactor 12 are capable of forming circular response, constantly make
Pure hydrogen is taken, and after direct reduced iron efficiency reduces, the fresh direct reduced iron that the generation of shaft furnace 7 can be used is replaced, pure
Hydrogen, which enters to be heated up in heat exchanger 3 by high-temperature synthesis gas after the condensation of condenser 13 is except water process, to be heated, purified furnace
Treated that synthesis gas mixes in mixer 4 for hydrogen after top gas, heating and cooling, purifying, after overregulating temperature and component
Form reducing gas for shaft furnace.
It should be noted that arrow direction is the flow direction of gas or the mobile side of direct reduced iron in Fig. 1
To.
The utility model additionally provides a kind of preparation method of reducing gas for shaft furnace, uses the preparation of above-mentioned reducing gas for shaft furnace
The preparation method of system, reducing gas for shaft furnace includes:
To the top gas entrance of the second cooling, purifying equipment be passed through top gas carry out cooling, purifying processing, i.e., to top gas into
Row cooling dedusting, desulfurization and decarburization processing；
By cooling, purifying, treated that top gas is passed through mixer；
The synthesis gas that airflow bed gasification furnace generates is passed sequentially through into heat exchanger and the first cooling, purifying equipment cool down only
Change processing carries out cooling processing twice to the high-temperature synthesis gas that airflow bed gasification furnace generates and dust-removal and desulfurizing is handled；
By cooling, purifying, treated that a part of synthesis gas is passed through mixer, and another part synthesis gas, the first cooling is net
The vapor and direct reduced iron for changing equipment generation are passed through hydrogen generating device hydrogen making, i.e., the hydrogen needed according to mixer
Amount, be passed through suitable synthesis gas to hydrogen generating device to produce required hydrogen；
The synthesis gas that the hydrogen that hydrogen generating device generates is generated with airflow bed gasification furnace is passed through heat exchanger to exchange heat
Processing, i.e., heat hydrogen by the synthesis gas of high temperature；
Hydrogen after heat exchange is passed through mixer；
Hydrogen after cooling, purifying treated top gas, cooling, purifying treated a part of synthesis gas and heat exchange is mixed
Also Primordial Qi is mixed and made into clutch.
The preparation method of reducing gas for shaft furnace provided by the utility model uses the preparation system of above-mentioned reducing gas for shaft furnace, because
This, the preparation method of reducing gas for shaft furnace has all advantages of the preparation system of above-mentioned reducing gas for shaft furnace, also, reducing gas for shaft furnace
Preparation method have the advantages that it is simple to operate.
Further, the gasification temperature of airflow bed gasification furnace is 1300 DEG C~1800 DEG C, the vapor pressure of airflow bed gasification furnace
For 0.5MPa~3.0MPa, the reaction temperature of hydrogen generating device is 600 DEG C -900 DEG C, with item needed for meeting each chemical reaction
Part.
Further, the top gas entrance of the second cooling, purifying equipment is connected with the outlet of the top gas of the furnace body of shaft furnace
It is logical, by the also Primordial Qi outlet of mixer and the furnace body of shaft furnace and Primordial Qi import is connected, enable top gas constantly into
Entering the second cooling, purifying equipment only needs regular replenishment since direct reduced iron is recycled as oxygen carrier, is not required to
Reactor is fully entered, the amount of direct reduced iron needs to determine according to the ingredient of top gas and the also Primordial Qi of shaft furnace, and shaft furnace is also
The preparation system of Primordial Qi is started to work investment, regular replenishment, and therefore, the direct reduced iron outlet of the furnace body of shaft furnace can be with
It is connected by pipeline with the direct reduced iron entrance of hydrogen generating device, it can also be by manually directly being gone back what shaft furnace generated
Former iron is delivered in hydrogen generating device.
Wherein, the top gas generated in shaft furnace is 300 DEG C~500 DEG C of temperature of hydrogen-rich gas, the temperature of direct reduced iron
It is 550 DEG C~800 DEG C.
Further, it is possible to heating device is set between the also Primordial Qi import of the also furnace body of Primordial Qi outlet and shaft furnace, with
So that the temperature for being passed through the reducing gas for shaft furnace of shaft furnace satisfies the use demand.
In conclusion the preparation system of reducing gas for shaft furnace provided by the utility model, is coupled using high-temperature gasification synthesis gas
Direct reduced iron hydrogen manufacturing, component is adjustable, low in cost without using expensive catalyst, and the thermal efficiency is high, and converts without CO
Device is heated hydrogen using heat exchanger by the heat transfer of the synthesis gas of high temperature to hydrogen, so that gasification furnace generates
The sensible heat of high temperature and pressure synthesis gas be fully used, and traditional handicraft elder generation cooling, desulfurizing decarburization, then convert heating and compare saves
Investment has been saved, has significantly reduced energy consumption, and reduce operating cost.
The preparation method of reducing gas for shaft furnace provided by the utility model uses the preparation system of above-mentioned reducing gas for shaft furnace, because
This, the preparation method of reducing gas for shaft furnace has all advantages of the preparation system of above-mentioned reducing gas for shaft furnace, also, reducing gas for shaft furnace
Preparation method have the advantages that it is simple to operate.
The above descriptions are merely exemplary embodiments of the present utility model, the model being not intended to limit the utility model
It encloses.Any those skilled in the art, made equivalent change under the premise of not departing from the conceptions and principles of the utility model
Change and modify, should belong to the range of the utility model protection.And it should be noted that the utility model each component part
It is not limited in above-mentioned overall applicability, each technical characteristic described in the specification of the utility model can select according to actual needs
It selects one and individually uses or select the multinomial use that combines, therefore, the utility model covers and this crime in the nature of things
The related other combinations of bright point and concrete application.
Claims (8)
1. a kind of preparation system of reducing gas for shaft furnace, which is characterized in that the preparation system of the reducing gas for shaft furnace includes at least:
Hydrogen generating device, with synthesis gas import, vapor import, direct reduced iron entrance and hydrogen exhaust mouth；
Airflow bed gasification furnace, with synthesis gas exhaust outlet；
Heat exchanger, with synthesis gas entrance, syngas outlet, hydrogen inlet and hydrogen outlet, the synthesis gas entrance and institute
It states synthesis gas exhaust outlet to be connected, the hydrogen inlet is connected with the hydrogen exhaust mouth；
Mixer is connected with first entrance, second entrance and also Primordial Qi outlet, the hydrogen outlet with the first entrance
It is logical；
First cooling, purifying equipment, with third entrance, purified synthesis gas outlet and steam outlet, the third entrance with
The syngas outlet is connected, purified synthesis gas outlet by two connecting lines respectively with the second entrance and described
Synthesis gas import is connected, and the vapor outlet is connected with the vapor import；
Second cooling, purifying equipment, with top gas entrance and top gas purge outlet, the top gas purge outlet and institute
First entrance is stated to be connected.
2. the preparation system of reducing gas for shaft furnace according to claim 1, which is characterized in that
The hydrogen generating device includes:
First reactor is equipped with first charging aperture, the first discharge port, the synthesis gas import and discharge outlet, the discharge outlet
It is in communication with the outside；
Second reactor is equipped with the direct reduced iron entrance, second charging aperture, the second discharge port, the vapor import
With the hydrogen exhaust mouth, the second charging aperture is connected with first discharge port, second discharge port and described the
One feed inlet is connected.
3. the preparation system of reducing gas for shaft furnace according to claim 2, which is characterized in that
Condenser is equipped between the hydrogen exhaust mouth and the hydrogen inlet.
4. the preparation system of reducing gas for shaft furnace according to claim 2, which is characterized in that
The first reactor is moving-burden bed reactor or fluidized-bed reactor, and the second reactor is moving-burden bed reactor
Or fluidized-bed reactor.
5. the preparation system of reducing gas for shaft furnace according to claim 2, which is characterized in that
The first cooling, purifying equipment includes the waste heat boiler, dust-extraction unit and desulfurizer being sequentially communicated, the waste heat boiler
Furnace is shell-and-tube heat exchanger, and the steam outlet and the third entrance are arranged on the waste heat boiler, the desulfurization dress
The outlet set is connected with the second entrance and the synthesis gas import respectively by two connecting lines.
6. the preparation system of reducing gas for shaft furnace according to claim 1, which is characterized in that
The second cooling, purifying equipment includes the washer and purification device being sequentially communicated, and the top gas entrance is arranged in institute
It states on washer, the outlet of the purification device is connected with the first entrance.
7. the preparation system of reducing gas for shaft furnace according to claim 6, which is characterized in that
The purification device includes the gas pressurized device and desulfurization and decarburization device being sequentially communicated, the gas pressurized device into
Mouth is connected with the washer, and the outlet of the desulfurization and decarburization device is connected with the first entrance.
8. the preparation system of reducing gas for shaft furnace according to any one of claim 1 to 7, which is characterized in that
The preparation system of the reducing gas for shaft furnace further includes shaft furnace, and the shaft furnace includes furnace body, and the furnace body is equipped with iron
Ore inlet, top gas outlet, also Primordial Qi entrance and direct reduced iron outlet, the top gas outlet and the top gas entrance
It is connected, the also Primordial Qi entrance is connected with the also Primordial Qi outlet, and the direct reduced iron entrance can directly be gone back with described
Former iron outlet is connected.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110438278A (en) * | 2019-09-11 | 2019-11-12 | 武汉科思瑞迪科技有限公司 | A kind of Shaft Furnace Direct Reduction Process of gas base and the combination of coal base phase |
| CN111363874A (en) * | 2018-12-25 | 2020-07-03 | 北京京诚泽宇能源环保工程技术有限公司 | System and method for preparing reducing gas of shaft furnace |
| WO2023101585A1 (en) * | 2021-11-30 | 2023-06-08 | Hybrit Development Ab | A system for direct reduction of iron ore to sponge iron |
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2018
- 2018-12-25 CN CN201822180908.1U patent/CN209292387U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111363874A (en) * | 2018-12-25 | 2020-07-03 | 北京京诚泽宇能源环保工程技术有限公司 | System and method for preparing reducing gas of shaft furnace |
| CN110438278A (en) * | 2019-09-11 | 2019-11-12 | 武汉科思瑞迪科技有限公司 | A kind of Shaft Furnace Direct Reduction Process of gas base and the combination of coal base phase |
| WO2023101585A1 (en) * | 2021-11-30 | 2023-06-08 | Hybrit Development Ab | A system for direct reduction of iron ore to sponge iron |
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