CN208949204U - The system of coal slurry gasifier and gas-based shaft kiln Joint Production direct reduced iron - Google Patents
The system of coal slurry gasifier and gas-based shaft kiln Joint Production direct reduced iron Download PDFInfo
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- CN208949204U CN208949204U CN201821363180.XU CN201821363180U CN208949204U CN 208949204 U CN208949204 U CN 208949204U CN 201821363180 U CN201821363180 U CN 201821363180U CN 208949204 U CN208949204 U CN 208949204U
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Abstract
The utility model discloses the systems of coal slurry gasifier and gas-based shaft kiln Joint Production direct reduced iron, it include: gasification furnace, radiation waste pot, high temperature cyclone separator, dedusting washing tower, desulfurization and decarburization tower, reformer and gas-based shaft kiln, the raw gas entrance of high temperature cyclone separator is connected with the outlet of the raw gas of radiation waste pot；Dedusting washing tower is connected with the pre- dedusting gas exit of high temperature cyclone separator；Desulfurization and decarburization tower is connected with dedusting washing tower；Reformer has coal gas-steam inlet, also Primordial Qi outlet, fuel-hot air inlet, exhanst gas outlet, coal gas-steam inlet is connected with desulfurization and decarburization tower and steam feedway respectively, and fuel-hot air inlet is connected with desulfurization and decarburization tower and hot air supplying apparatus respectively；Gas-based shaft kiln has pellet entrance, also Primordial Qi entrance, reduced iron outlet and top gas outlet, and also Primordial Qi entrance is connected with also Primordial Qi outlet.The coupling of coal slurry gasifier and gas-based shaft kiln can be effectively realized using the system of the Joint Production direct reduced iron.
Description
Technical field
The utility model belongs to direct-reduction process for making iron field, specifically, the utility model relates to water-coal-slurry gas
Change the system of furnace and gas-based shaft kiln Joint Production direct reduced iron.
Background technique
Gasification furnace is used for the gasification reaction of water-coal-slurry, generates raw gas (main component CO, H2、CO2、CH4And it is a small amount of
H2S), by dedusting, desulfurization and decarburization (dust, H in removing raw gas2S and CO2), by reformer, make CH4And H2O occurs anti-
CO and H should be generated2, ultimately generating mainly becomes H2With CO (H2/ CO=1.5) also Primordial Qi.
It is gas-based shaft kiln directly reduced with reducibility gas (CO and H2) it is reducing agent, it is being lower than natural crystal or artificial agglomerate
Furnace charge is restored under the conditions of softening temperature to obtain solid metallic iron, the alternative steel scrap of product is simultaneously better than steel scrap, be smelt clean steel,
The best iron material of high-grade steel.Gas-based shaft kiln directly reduced have that production scale is big, at low cost, flexible operation, environmental-friendly
The advantages that, it is used widely in countries and regions such as the Middle East, India.Due to coal resources in China rich reserves, natural gas is provided
Source lacks, so that the application of this iron-smelting process is restricted, forms single using coal as the Ferrous Metallurgy of main energy sources
Long process mode causes entire industry high energy consumption, high pollution, high-cost unfavorable situation.
Utility model content
The utility model is intended to solve at least some of the technical problems in related technologies.For this purpose, this reality
It is the system for proposing coal slurry gasifier and gas-based shaft kiln Joint Production direct reduced iron with a novel purpose, using this
System can effectively realize the coupling of coal slurry gasifier and gas-based shaft kiln.
One aspect according to the present utility model, the utility model proposes a kind of coal slurry gasifiers to combine with gas-based shaft kiln
The system for producing direct reduced iron, embodiment according to the present utility model, the system include:
Gasification furnace, the gasification furnace is interior to have gasification chamber, and the inner wall of the gasification chamber is provided with the first water-cooling wall, institute
It states and is provided with burner at the top of gasification furnace, the burner is suitable for spraying into water-coal-slurry and oxygen, the gasification into the gasification furnace
The bottom of furnace is exported with gasification product；
Radiation waste pot, is provided with the second water-cooling wall in the radiation waste pot, the radiation waste cookware have gasification product entrance,
Slag-drip opening and raw gas outlet, the gasification product entrance are connected with gasification product outlet,
High temperature cyclone separator, the high temperature cyclone separator have raw gas entrance, pre- dedusting gas exit and flying dust
Outlet, the raw gas entrance are connected with raw gas outlet；
Dedusting washing tower, the dedusting washing tower are connected with the pre- dedusting gas exit；
Desulfurization and decarburization tower, the desulfurization and decarburization tower are connected with the dedusting washing tower；
Reformer, the reformer have coal gas-steam inlet, and also Primordial Qi outlet, fuel-hot air inlet, flue gas goes out
Mouthful, the coal gas-steam inlet is connected with desulfurization and decarburization tower and steam feedway respectively, the fuel-hot air inlet point
It is not connected with the desulfurization and decarburization tower and hot air supplying apparatus；
There is pellet entrance, also Primordial Qi entrance, reduced iron outlet and top gas to go out for gas-based shaft kiln, the gas-based shaft kiln
Mouthful, the also Primordial Qi entrance is connected with the also Primordial Qi outlet.
The coal slurry gasifier of the utility model above-described embodiment and gas-based shaft kiln Joint Production direct reduced iron as a result,
The synthesis gas that gasification furnace generates can be used directly for gas-based shaft kiln after cleaning dust, desulfurization and decarburization and reformation by system
Reduced iron, realize material and energy efficient utilization.
In addition, being reduced directly according to the coal slurry gasifier of the utility model above-described embodiment and gas-based shaft kiln Joint Production
The system of iron can also have the following additional technical features:
In the present invention, the coal slurry gasifier of above-described embodiment and gas-based shaft kiln Joint Production direct reduced iron
System further comprises: drum, the drum respectively with the saturated vapor of first water-cooling wall, the second water-cooling wall outlet and
Coal gas-steam inlet is connected.
In the present invention, the coal slurry gasifier of above-described embodiment and gas-based shaft kiln Joint Production direct reduced iron
System further comprises: wet milk, and the wet milk has raw coal entrance, water-additive entrance and gray back entrance, the gray back
Entrance is connected with flying dust outlet.
In the present invention, the coal slurry gasifier of above-described embodiment and gas-based shaft kiln Joint Production direct reduced iron
System further comprises: top gas washer, and the top gas washer has top gas entrance and the outlet of purification top gas, institute
The outlet of top gas entrance and the top gas is stated to be connected, the purification top gas export respectively with the desulfurization and decarburization tower and described
Fuel-hot air inlet is connected.
In the present invention, the coal slurry gasifier of above-described embodiment and gas-based shaft kiln Joint Production direct reduced iron
System further comprises: air preheater, and the air preheater has cool air inlet, hot air outlet, hot fume entrance
It is exported with cold flue gas, the hot fume entrance is connected with the reformer exhanst gas outlet, the hot air outlet and the fuel-
Hot air inlet is connected.
Detailed description of the invention
Fig. 1 is reduced directly according to the coal slurry gasifier and gas-based shaft kiln Joint Production of the utility model one embodiment
The structural schematic diagram of the system of iron.
Fig. 2 is according to the straight using coal slurry gasifier and gas-based shaft kiln Joint Production of the utility model another embodiment
Connect the method flow schematic diagram of the system production direct reduced iron of reduced iron.
Specific embodiment
The embodiments of the present invention are described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng
The embodiment for examining attached drawing description is exemplary, it is intended to for explaining the utility model, and should not be understood as to the utility model
Limitation.
One aspect according to the present utility model, the utility model proposes a kind of coal slurry gasifiers to combine with gas-based shaft kiln
The system for producing direct reduced iron, below with reference to Fig. 1 be described in detail the coal slurry gasifier of the utility model specific embodiment with
The system of gas-based shaft kiln Joint Production direct reduced iron.
According to the system packet of the utility model embodiment coal slurry gasifier and gas-based shaft kiln Joint Production direct reduced iron
It includes:
Gasification furnace 100, the gasification furnace 100 is interior to have gasification chamber 101, and the inner wall of the gasification chamber 101 is provided with
First water-cooling wall 102, the top of the gasification furnace 100 are provided with burner 103, and the burner 103 is suitable for the gasification furnace 100
Interior penetrating water-coal-slurry and oxygen, the bottom of the gasification furnace 100 have gasification product outlet 104；
Radiation waste pot 200 is provided with the second water-cooling wall 201 in the radiation waste pot 200, and the radiation waste pot 200 has
Gasification product entrance 202, slag-drip opening 203 and raw gas outlet 204, the gasification product entrance 202 goes out with the gasification product
Mouth 104 is connected,
There is raw gas entrance 301, pre- dedusting coal gas to go out for high temperature cyclone separator 300, the high temperature cyclone separator 300
Mouth 302 and flying dust outlet 303, the raw gas entrance 301 are connected with raw gas outlet 204；
Dedusting washing tower 400, the dedusting washing tower 400 are connected with the pre- dedusting gas exit 302；
Desulfurization and decarburization tower 500, the desulfurization and decarburization tower 500 are connected with the dedusting washing tower 400；
Reformer 600, the reformer 600 have coal gas-steam inlet 601, and also Primordial Qi exports 602, fuel-hot-air
Entrance 603, exhanst gas outlet 604, the coal gas-steam inlet 601 respectively with desulfurization and decarburization tower 500 and steam feedway phase
Even, the fuel-hot air inlet 603 is connected with the desulfurization and decarburization tower 500 and hot air supplying apparatus respectively；
Gas-based shaft kiln 700, the gas-based shaft kiln 700 have pellet entrance 701, also Primordial Qi entrance 702, reduced iron outlet
703 and top gas outlet 704, the also Primordial Qi entrance 702 602 be connected with the also Primordial Qi outlet.
The coal slurry gasifier of the utility model above-described embodiment and gas-based shaft kiln Joint Production direct reduced iron as a result,
The synthesis gas that gasification furnace generates can be used directly for gas-based shaft kiln after cleaning dust, desulfurization and decarburization and reformation by system
Reduced iron, realize material and energy efficient utilization.
Specific embodiment according to the present utility model, the coal slurry gasifier and gas-based shaft kiln Joint Production of above-described embodiment
The system of direct reduced iron further comprises: drum 800, the drum 800 respectively with first water-cooling wall 102, the second water
The saturated vapor of cold wall 201 exports and coal gas-steam inlet 601 is connected.Specifically, first in gasification furnace 100 at high temperature
Gasification reaction occurs, the first water-cooling wall 102 protects gasification stove internal wall, while recycling gasification furnace heat and generating superheated water steaming
Gas is entered in radiation waste pot 200 by the high-temperature crude synthesis gas that gasification furnace 100 is discharged, and is carried out heat using the second water-cooling wall 201 and is returned
It receives and generates overheated steam.Further, the steam generated in the first water-cooling wall 102 and the second water-cooling wall 201 is passed through vapour
In packet 800, and it is further passed through the reforming reaction in reformer 600 for coal gas after purifying, to obtain also Primordial Qi.Therefore,
The efficient utilization of internal system material and energy is realized by the way that drum 800 is arranged, avoids outer for steam, saves energy consumption.
Specific embodiment according to the present utility model, the coal slurry gasifier and gas-based shaft kiln Joint Production of above-described embodiment
The system of direct reduced iron further comprises: wet milk 900, and there is the wet milk 900 raw coal entrance 901, water-additive to enter
Mouth 902 and gray back entrance 903, the gray back entrance 903 are connected with flying dust outlet 303.As a result, first with wet milk
900 can carry out defibrination to raw coal, to obtain water-coal-slurry convenient for gasification reaction.Secondly, can be by high temperature cyclone separator 300
The flying dust isolated returns to water-coal-slurry processed and further prepares synthesis gas, and then raw coal is avoided to waste, and improves resource utilization.
Specific embodiment according to the present utility model, the coal slurry gasifier and gas-based shaft kiln Joint Production of above-described embodiment
The system of direct reduced iron further comprises: top gas washer 1000, and the top gas washer 1000 enters with top gas
Mouth 1001 and purification top gas outlet 1002, the top gas entrance 1001 is connected with top gas outlet 704, the purification
Top gas outlet 1002 is connected with the desulfurization and decarburization tower 500 and the fuel-hot air inlet 603 respectively.Thus furnace is utilized
Top gas washer 1000 can be purified and be recycled to the top gas generated in gas-based shaft kiln 700, a portion purification
Top gas can directly be passed into reformer 700 and provide heat source for reforming reaction, and the purification top gas of another part can
Desulfurization and decarburization processing is carried out to be passed into desulfurization and decarburization tower 500, finally reforming reaction is carried out together with coal gas after purification and is used in combination
In the direct reduced iron reaction in gas-based shaft kiln 700.It as a result, can be further real by the way that above-mentioned top gas washer 1000 is arranged
The recycling of shaft furnace top gas in existing gas-based shaft kiln 700.
Specific embodiment according to the present utility model, the coal slurry gasifier and gas-based shaft kiln Joint Production of above-described embodiment
The system of direct reduced iron further comprises: air preheater 1100, and the air preheater 1100 has cool air inlet
1101, hot air outlet 1102, hot fume entrance 1103 and cold flue gas outlet 1104, the hot fume entrance 1103 with it is described heavy
Whole kiln gas outlet 604 is connected, and the hot air outlet 1102 is connected with the fuel-hot air inlet 603.Pass through as a result,
Hot fume entrance 1103 is simultaneously further connected by setting air preheater 1100 with the reformer exhanst gas outlet 604, in turn
The high-temperature flue gas that reformer 600 itself generation can be effectively utilized preheats the required air that burns of reformer 600, into
And realize the efficient utilization of energy.
For more convenient coal slurry gasifier for understanding the utility model above-described embodiment and gas-based shaft kiln Joint Production
The system of direct reduced iron is below described in detail the method using the system production direct reduced iron.
As shown in Fig. 2, directly also according to the coal slurry gasifier of the utility model embodiment and gas-based shaft kiln Joint Production
The method of former iron includes:
Gasification reaction is carried out to water-coal-slurry using the gasification furnace with water-cooling wall, to obtain gasification product, and generates steam；
So that the gasification product, which enters, carries out heat recovery and separation in radiation waste pot, to obtain raw gas and to give up
Slag, and generate steam；
The raw gas is passed through in high temperature cyclone separator and carries out ash disposal, to isolate flying dust and to obtain pre- dedusting coal
Gas；
The pre- dedusting coal gas is successively passed through in dedusting washing tower and desulfurization and decarburization tower and is dusted and desulfurization and decarburization, with
Just it is purified rear coal gas；
Coal gas after the purification of a part is mixed with steam and is passed through in reformer and carries out reforming reaction, to obtain
Coal gas after the purification of another part, is mixed with hot-air that be passed through in the reformer be that the reforming reaction is mentioned by also Primordial Qi
Supplying heat source, and generate hot fume；
The also Primordial Qi is passed through in gas-based shaft kiln, the pellet in the gas-based shaft kiln is restored, to be gone back
Former iron simultaneously generates top gas.
It is direct by using the coal slurry gasifier of the utility model above-described embodiment and gas-based shaft kiln Joint Production as a result,
The synthesis gas that gasification furnace generates can be used directly for by the method for reduced iron after cleaning dust, desulfurization and decarburization and reformation
The reduced iron of gas-based shaft kiln realizes the efficient utilization of material and energy.
Specific embodiment according to the present utility model, the coal slurry gasifier and gas-based shaft kiln Joint Production of above-described embodiment
The method of direct reduced iron further comprises: the steam that the gasification furnace and the radiation waste pot generate is passed through in drum, with
Just the reforming reaction for coal gas after the purification provides steam.Specifically, raw gasification reaction is issued in high temperature first in gasification furnace,
The first water-cooling wall in gasification furnace protects gasification stove internal wall, while recycling gasification furnace heat and generating overheated steam, by gas
Change the high-temperature crude synthesis gas that fire grate goes out to enter in radiation waste pot, carries out heat recovery simultaneously using the second water-cooling wall in radiation waste pot
Generate overheated steam.Further, the steam generated in the first water-cooling wall and the second water-cooling wall is passed through in drum, goes forward side by side one
Step is passed through the reforming reaction in reformer for coal gas after purifying, to obtain also Primordial Qi.Therefore, it is realized by the way that drum is arranged
The efficient utilization of internal system material and energy, avoids outer for steam, saves energy consumption.
Specific embodiment according to the present utility model, the coal slurry gasifier and gas-based shaft kiln Joint Production of above-described embodiment
The method of direct reduced iron further comprises: the high temperature cyclone separator being isolated flying dust return wet milk and is used to prepare gas
Change the water-coal-slurry of reaction.Thus, it is possible to which the flying dust that high temperature cyclone separator is isolated is returned to water-coal-slurry processed and is further prepared
Synthesis gas, and then raw coal is avoided to waste, improve resource utilization.
Specific embodiment according to the present utility model, the coal slurry gasifier and gas-based shaft kiln Joint Production of above-described embodiment
The method of direct reduced iron further comprises: the top gas is passed through in top gas washer and carries out carrying out washing treatment, so as to
To purification top gas, the purification top gas of a part is passed through in the reformer and provides heat source for the reforming reaction,
The purification top gas of another part is passed through in the desulfurization and decarburization tower.It thus can be to gas base using top gas washer
The top gas generated in shaft furnace is purified and is recycled, and a portion purification top gas can be directly passed into reformer
Heat source is provided for reforming reaction, the purification top gas of another part, which can be passed into desulfurization and decarburization tower, carries out desulfurization and decarburization
Processing finally carries out reforming reaction and for the direct reduced iron reaction in gas-based shaft kiln together with coal gas after purification.Lead to as a result,
The recycling of the shaft furnace top gas in gas-based shaft kiln can be further realized by crossing setting above-mentioned steps.
Specific embodiment according to the present utility model, the coal slurry gasifier and gas-based shaft kiln Joint Production of above-described embodiment
The method of direct reduced iron further comprises: by the hot fume generated in the reformer be passed through in air preheater to air into
Row preheating, and obtained hot-air is provided to heat source for the reforming reaction.It as a result, can be effective by setting air preheater
The high-temperature flue gas that ground is generated using reformer itself preheats air needed for reformer burning, and then realizes the height of energy
Effect utilizes.
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 spy described in conjunction with this embodiment or example
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
Identical embodiment or example need not be directed to by stating.Moreover, particular features, structures, materials, or characteristics described can be
It can be combined in any suitable manner in any one or more embodiment or examples.In addition, without conflicting with each other, this field
Technical staff can carry out the feature of different embodiments or examples described in this specification and different embodiments or examples
Combination and combination.
Although the embodiments of the present invention have been shown and described above, it is to be understood that above-described embodiment is
Illustratively, it should not be understood as limiting the present invention, those skilled in the art are in the scope of the utility model
Inside it can make changes, modifications, alterations, and variations to the above described embodiments.
Claims (5)
1. the system of a kind of coal slurry gasifier and gas-based shaft kiln Joint Production direct reduced iron characterized by comprising
Gasification furnace, the gasification furnace is interior to have gasification chamber, and the inner wall of the gasification chamber is provided with the first water-cooling wall, the gas
Change and be provided with burner at the top of furnace, the burner is suitable for spraying into water-coal-slurry and oxygen into the gasification furnace, the gasification furnace
Bottom is exported with gasification product；
Radiation waste pot is provided with the second water-cooling wall in the radiation waste pot, and the radiation waste cookware has gasification product entrance, deslagging
Mouth and raw gas outlet, the gasification product entrance are connected with gasification product outlet,
High temperature cyclone separator, the high temperature cyclone separator have raw gas entrance, pre- dedusting gas exit and flying dust outlet,
The raw gas entrance is connected with raw gas outlet；
Dedusting washing tower, the dedusting washing tower are connected with the pre- dedusting gas exit；
Desulfurization and decarburization tower, the desulfurization and decarburization tower are connected with the dedusting washing tower；
Reformer, the reformer have coal gas-steam inlet, also Primordial Qi outlet, fuel-hot air inlet, exhanst gas outlet, institute
Coal gas-steam inlet is stated to be connected with desulfurization and decarburization tower and steam feedway respectively, the fuel-hot air inlet respectively with institute
Desulfurization and decarburization tower is stated to be connected with hot air supplying apparatus；
Gas-based shaft kiln, the gas-based shaft kiln have pellet entrance, also Primordial Qi entrance, reduced iron outlet and top gas outlet, institute
Also Primordial Qi entrance is stated to be connected with the also Primordial Qi outlet.
2. the system of coal slurry gasifier according to claim 1 and gas-based shaft kiln Joint Production direct reduced iron, special
Sign is, further comprises:
Drum, the drum enter with the outlet of the saturated vapor of first water-cooling wall, the second water-cooling wall and coal gas-steam respectively
Mouth is connected.
3. the system of coal slurry gasifier according to claim 1 and gas-based shaft kiln Joint Production direct reduced iron, special
Sign is, further comprises: wet milk, and the wet milk has raw coal entrance, water-additive entrance and gray back entrance, described
Gray back entrance is connected with flying dust outlet.
4. the system of coal slurry gasifier according to claim 1 and gas-based shaft kiln Joint Production direct reduced iron, special
Sign is, further comprises:
Top gas washer, the top gas washer have top gas entrance and the outlet of purification top gas, and the top gas enters
Mouth is connected with top gas outlet, and the purification top gas outlet is empty with the desulfurization and decarburization tower and the fuel-heat respectively
Gas entrance is connected.
5. the system of coal slurry gasifier according to claim 1 and gas-based shaft kiln Joint Production direct reduced iron, special
Sign is, further comprises:
Air preheater, the air preheater have cool air inlet, hot air outlet, and hot fume entrance and cold flue gas go out
Mouthful, the hot fume entrance is connected with the reformer exhanst gas outlet, the hot air outlet and the fuel-hot air inlet
It is connected.
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| CN201821363180.XU CN208949204U (en) | 2018-08-22 | 2018-08-22 | The system of coal slurry gasifier and gas-based shaft kiln Joint Production direct reduced iron |
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| CN201821363180.XU CN208949204U (en) | 2018-08-22 | 2018-08-22 | The system of coal slurry gasifier and gas-based shaft kiln Joint Production direct reduced iron |
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Effective date of registration: 20190719 Address after: 100084 Beijing City, Haidian District Tsinghua Yuan Co-patentee after: Shanxi Clean Energy Research Institute, Tsinghua University Patentee after: Tsinghua University Address before: 030032 No. 10, electronic street, Taiyuan, Shanxi Patentee before: Shanxi Clean Energy Research Institute, Tsinghua University |