CN210030765U - System for utilize ou metallurgical stove gasifier output coal gas production direct reduction iron - Google Patents
System for utilize ou metallurgical stove gasifier output coal gas production direct reduction iron Download PDFInfo
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- CN210030765U CN210030765U CN201920579229.3U CN201920579229U CN210030765U CN 210030765 U CN210030765 U CN 210030765U CN 201920579229 U CN201920579229 U CN 201920579229U CN 210030765 U CN210030765 U CN 210030765U
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Abstract
The utility model provides a system for producing direct reduced iron by utilizing output coal gas of an Ou-smelting furnace gasifier, which comprises the Ou-smelting furnace gasifier, wherein the Ou-smelting furnace gasifier comprises a first high-temperature coal gas output pipeline and a second high-temperature coal gas output pipeline; the first high-temperature coal gas output pipeline and the second high-temperature coal gas output pipeline are respectively and independently communicated with the thermal cyclone dust removal system; and the direct reduction shaft furnace is communicated with the hot cyclone dust removal system. The utility model discloses the high-quality coal gas that has utilized ou ye stove melting gasifier output comes additional production direct reduction iron, because output coal gas is of high quality, the coal gas processing system configuration is simple, has reduced the investment cost of reducing gas preparation system, produces the direct reduction iron of higher quality, and process flow is simple, and equipment technology is localized, effectively reduces the manufacturing cost of flow system, promotes whole economic benefits and market competition.
Description
Technical Field
The utility model relates to the technical field of smelting of iron or steel, in particular to a system for producing direct reduced iron by utilizing output coal gas of a gasification furnace of an Ou-smelting furnace.
Background
In recent years, with various difficulties and development bottlenecks encountered by traditional industries such as the iron and steel industry, the environmental protection pressure of excess capacity, high cost and continuous upgrading is a key factor for restricting the structural transformation of iron and steel enterprises. Compared with the traditional blast furnace process, the COREX smelting reduction iron-making process has the characteristics of no coke or less coke, environmental friendliness, high production reliability, high strain capacity and the like, so that the process technology is concerned and developed worldwide and is commercially applied in multiple countries.
The Euro metallurgical furnace is an upgraded smelting reduction iron-making device developed by combining the resource characteristics of coal, iron ore and the like in local areas on the basis of Bady iron and steel in Xinjiang and Bady iron and steel in Bao Steel-type COREX-3000, and the device has a main body structure similar to that of the COREX iron-making device and mainly comprises an upper pre-reduction shaft furnace and a lower smelting gasification furnace. Since the start-up of the furnace, the Ou metallurgical furnace is improved in the aspects of raw fuel proportioning, material distribution equipment, coal injection and the like, and achieves better effect. According to measurement and calculation, the molten iron cost of the European and metallurgical furnace is basically equal to or even slightly lower than that of a blast furnace, and the competitive advantage of the product is increasingly highlighted. How to further excavate the potentiality of eustoma furnace device forms systematic energy saving and emission reduction, cost reduction and efficiency improvement's comprehensive advantage, has important meaning to the further development of our country's smelting reduction ironmaking technique.
At present, a plurality of COREX/Eustoma gasifier process devices which are successfully and commercially operated abroad mainly adopt different comprehensive utilization modes on top gas output by a pre-reduction shaft furnace so as to further reduce environmental load and enhance the overall economic benefit of the process devices. For example, the COREX-2000 unit of the kyader steel works in korea and india adopts a mode of outputting coal gas to generate electricity, but the generating efficiency of the actual operation is not high, and the energy consumption loss is large; the method fully utilizes the top gas output by the pre-reduction shaft furnace, has higher utilization efficiency and actual effect compared with power generation, and further reduces the operation cost of the steel mill, but the investment is increased in the aspects of gas conversion and treatment because the content of effective components of the output gas is not high.
In the published patent application, a "method and system for producing sponge iron by using a COREX device and a direct reduction shaft furnace" was searched and found in a utility model patent, which adopts the following method: the method comprises the steps of utilizing the coal gas output by the pre-reduction shaft furnace at the upper part of the COREX device to pass through a series of treatment systems such as coal gas washing, pressurization, decarburization and denitrification, entering a coal gas cabinet for caching, then mixing with the coke oven gas or natural gas of a supplement part, humidifying and reforming, and preparing into final reduction gas to enter the direct reduction shaft furnace.
SUMMERY OF THE UTILITY MODEL
In view of the above shortcomings in the prior art, an object of the present invention is to provide a system for producing direct reduced iron by using the output gas of a gasification furnace of an euler furnace, which is used for solving the problems of complex flow, high investment cost and the like of a gas treatment system in the prior art.
In order to achieve the above objects and other related objects, the present invention provides a system for producing direct reduced iron using output coal gas of a gasification furnace of an Ou-smelting furnace, comprising: the gasification furnace of the euler furnace comprises a first high-temperature coal gas output pipeline and a second high-temperature coal gas output pipeline;
the first high-temperature coal gas output pipeline and the second high-temperature coal gas output pipeline are respectively and independently communicated with the thermal cyclone dust removal system;
and the direct reduction shaft furnace is communicated with the hot cyclone dust removal system.
Optionally, the system further comprises a gas washing and dust removing system communicated with the direct reduction shaft furnace and used for washing and removing dust from the gas.
Optionally, the gas scrubbing and dust removal system comprises a wet scrubbing annulus washer.
Optionally, the gas washing and dust removing system comprises a dry bag dust remover and a water sprayer.
Optionally, the system also comprises a gas pressurization system communicated with the gas washing and dust removal system.
Optionally, the system further comprises a gas decarbonization system communicated with the gas pressurization system.
Optionally, the gas decarbonization system is selected from a vacuum pressure swing adsorption system.
Optionally, the gas decarbonization system is communicated to an air inlet pipeline of the direct reduction shaft furnace, and part of decarbonized gas is mixed with the first high-temperature gas stream output by the hot cyclone dust removal system.
Optionally, the gas decarbonization system is also communicated to a pre-reduction furnace or an external pipeline, and the other part of decarbonized gas is conveyed to the pre-reduction furnace or external equipment.
Optionally, the system further comprises a pre-reduction furnace communicated with the hot cyclone dust removal system, and the second high-temperature coal gas stream output by the hot cyclone dust removal system enters the pre-reduction furnace.
Optionally, the gas outlet end of the pre-reduction furnace is communicated with a gas washing and pressurizing system for washing and pressurizing the gas output by the pre-reduction furnace.
Optionally, an air outlet end of the gas washing and pressurizing system is communicated to a second high-temperature gas inlet pipeline of the hot cyclone dust removal system, and gas output by the gas washing and pressurizing system is mixed with the second high-temperature gas stream to cool the second high-temperature gas stream.
The method for producing the direct reduced iron by adopting the system comprises the following steps: the high-temperature coal gas output by the coal gas generating pipe of the pyrometallurgical furnace is divided into two parts, wherein the two parts comprise a first high-temperature coal gas stream and a second high-temperature coal gas stream, and the first high-temperature coal gas stream is subjected to hot cyclone dust removal, mixed with coal gas discharged by the direct reduction shaft furnace, and enters the direct reduction shaft furnace to produce direct reduced iron.
Typically, the first hot gas stream has a volume fraction of 60-70%. External N may be used just as it is being produced2Or manual gas distribution is carried out to achieve the purpose of cooling, and the coal gas discharged by the direct reduction shaft furnace can be recycled after the production operation is stable.
Optionally, the second high-temperature coal gas stream is subjected to hot cyclone dust removal and then is introduced into a pre-reduction furnace for pre-reducing iron ores so as to provide an iron raw material for a lower melter-gasifier.
Optionally, the iron ore in the pre-reduction furnace can be one or more of pellets, sintered ores and lump ores.
Optionally, after the gas discharged from the pre-reduction furnace is washed and pressurized, a backflow gas is formed and mixed with the second high-temperature gas stream, and then the hot cyclone dust removal treatment is performed, wherein the backflow gas can simultaneously play a role in cooling the second high-temperature gas stream.
Optionally, the temperature of the backflow coal gas is 35-40 ℃, and the pressure is 0.3-0.4 MPa.
Optionally, the temperature of a mixed gas formed by the return gas and the second high-temperature gas stream is about 850 ℃, the mixed gas is a pre-reduction gas, and the pre-reduction gas enters the pre-reduction furnace for reaction after being subjected to thermal cyclone dust removal.
Optionally, the iron ore in the direct reduction shaft furnace is selected from at least one of hematite, magnetite, vanadium titano-magnetite.
Alternatively, the iron ore can be oxidized pellets or lump ore made of hematite, magnetite or vanadium titano-magnetite, and can also be a mixture of oxidized pellets and lump ore.
Optionally, the coal gas discharged from the direct reduction shaft furnace is subjected to washing, dust removal, pressurization and decarburization treatment in sequence to form decarburization coal gas.
Optionally, the manner of scrubbing and dust removal is selected from any one of:
A) washing and dedusting by a wet method;
B) dry cloth bag dust removal and water spraying are combined.
Optionally, during the decarburization treatment, the adopted decarburization system is a vacuum pressure swing adsorption system, the temperature of inlet gas of the gas decarburization system is less than or equal to 40 ℃, and the pressure is greater than or equal to 0.3 MPa.
Optionally, a part of the decarbonized gas is mixed with the first high-temperature gas stream subjected to the hot cyclone dust removal, the mixture enters the direct reduction shaft furnace, the volume ratio of the backflow gas can be adjusted within the range of 0-100%, and the decarbonized gas can simultaneously play a role in cooling the first high-temperature gas stream. The first high-temperature coal gas stream directly enters a hot cyclone dust removal system, the high-temperature coal gas after dust removal and backflow cold coal gas discharged from the direct reduction shaft furnace and treated by a coal gas washing and dust removal system, a coal gas pressurization system and a coal gas decarburization system are mixed according to a certain proportion, and the flow of the backflow cold coal gas is controlled to form reducing gas which can meet the requirements of temperature, flow and the like required by reducing different iron ores, and then the reducing gas enters the shaft furnace to reduce the iron ores to produce direct reduced iron.
Optionally, the other part of the decarbonized gas is used as reducing gas of the pre-reduction furnace or is externally used, and the externally used gas can be specifically integrated into a gas pipe network inside a steel mill or can be externally supplied.
Optionally, the temperature of high-temperature coal gas output by the coal gas generating pipe of the smelting gasification furnace of the Ou-metallurgical furnace is 1000-1050 ℃, the pressure is 0.3-0.4 MPa, and the effective gas is CO + H2The volume ratio of (A) is more than or equal to 90 percent.
Optionally, the temperature of the reducing gas in the direct reduction shaft furnace is 850-1000 ℃, and the flow rate is 1700-2200 Nm3/t-DRI。
As above, the utility model discloses an utilize system of ou metallurgical stove gasifier output coal gas production direct reduction iron has following beneficial effect: the utility model discloses the high-quality coal gas that has utilized ou ye stove melting gasifier output comes additional production direct reduction iron, because output coal gas is of high quality, the coal gas processing system configuration is simple, has reduced the investment cost of reducing gas preparation system, produces the direct reduction iron of higher quality, and process flow is simple, and equipment technology is localized, effectively reduces the manufacturing cost of flow system, promotes whole economic benefits and market competition.
Drawings
FIG. 1 is a schematic diagram of a system for producing direct reduced iron by using the output coal gas of an Ou-smelting furnace gasifier in the embodiment of the present invention.
Description of the reference symbols
Gasification furnace for 1-Ou metallurgical furnace
2-first high-temperature gas output pipeline
3-second high-temperature gas output pipeline
4-hot cyclone dust removal system
5-direct reduction shaft furnace
6-gas washing and dust removing system
7-gas pressurization system
8-gas decarbonization system
9-prereduction furnace
10-gas scrubbing and pressurizing system
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.
An object of the utility model is to provide an utilize system of euler's stove gasifier output coal gas production direct reduction iron, compare with other systems, this system is when guaranteeing euler's stove in advance reduction furnace output coal gas normal cyclic utilization, still further utilized the high quality coal gas of euler's stove melting gasifier output to produce direct reduction iron, because the effective reduction gas content and the temperature of output coal gas are all higher, the coal gas processing system of follow-up matching is more simple, can reduce outside direct reduction shaft furnace with the investment cost of reducing gas preparation system, high-quality coal gas supply is favorable to producing the direct reduction iron product of higher quality, the flow is simplified, reduce the manufacturing cost of flow system, the whole economic benefits and the market competition advantage of lift system.
The utility model provides a system for utilize ou ye burner gasification stove output coal gas production direct reduced iron, will combine the attached drawing in the following, will describe the embodiment of the utility model in detail, as shown in figure 1, including ou ye burner gasification stove 1, ou ye burner gasification stove 1 includes first high temperature coal gas output pipeline 2 and second high temperature coal gas output pipeline 3; the first high-temperature coal gas output pipeline 2 and the second high-temperature coal gas output pipeline 3 are respectively and independently communicated with the thermal cyclone dust removal system 4; and the direct reduction shaft furnace 5 is communicated with the hot cyclone dust removal system 4, and the first high-temperature coal gas strand is used for reducing the iron ore in the direct reduction shaft furnace 5, so that the high-temperature coal gas discharged by the gasification furnace 1 of the pyrometallurgical furnace is efficiently utilized.
In one embodiment, the system further comprises a gas scrubbing and dust removal system 6 in communication with the direct reduction shaft furnace 5 for scrubbing and removing dust from the gas.
In one embodiment, the gas scrubbing and dust removal system 6 comprises a wet scrubbing annular gap scrubber for wet scrubbing and dust removal of the gas exiting the direct reduction shaft furnace 5.
In one embodiment, the gas washing and dust removal system comprises a dry bag dust collector and a water sprayer, and performs dry dust removal and water spray washing on the gas discharged from the direct reduction shaft furnace 5.
In one embodiment, the system further comprises a gas pressurization system 7 communicated with the gas washing and dust removal system 6 and used for pressurizing the gas.
In one embodiment, a gas decarbonization system 8 is further included in communication with the gas pressurization system 7 for decarbonizing the gas.
In one embodiment, the gas decarbonization system 8 is selected from a vacuum pressure swing adsorption system.
In one embodiment, the gas decarbonization system 8 is connected to the gas inlet duct of the direct reduction shaft furnace 1, and part of the decarbonized gas is mixed with the first high-temperature gas stream output by the hot cyclone dust removal system 4 and enters the direct reduction shaft furnace 5 to reduce the iron ore.
In one embodiment, the gas decarbonization system 8 is further connected to the pre-reduction furnace 9 or an external pipeline, and another part of the decarbonized gas can be delivered to the pre-reduction furnace or an external device.
In one embodiment, the system further comprises a pre-reduction furnace 9 communicated with the hot cyclone dust removal system 4, and the second high-temperature coal gas stream output by the hot cyclone dust removal system 4 enters the pre-reduction furnace.
In an embodiment, the gas outlet end of the pre-reduction furnace 9 is communicated with a gas washing and pressurizing system 10 for washing and pressurizing the gas output from the pre-reduction furnace 9.
In one embodiment, the gas outlet of the gas washing and pressurizing system 10 is connected to the second high temperature gas inlet pipeline 3 of the hot cyclone dust removal system 4, and the gas output from the gas washing and pressurizing system 10 is mixed with the second high temperature gas stream, so as to cool the second high temperature gas stream.
The operation process of the system is as follows:
(1) the high-temperature coal gas output by the process unit of the smelting gasification furnace of the Eustoma furnace has the coal gas temperature of 1000-1050 ℃, the pressure of 0.3-0.4 MPa and CO + H in the coal gas2Adding cooling gas from a cooling gas pipe 9 on the upper part of the Ou smelting furnace to cool gas discharged from a pre-reduction furnace 9 on the upper part of the Ou smelting furnace after gas washing and pressurization treatment, wherein the temperature of the cooling gas is 35-40 ℃, the pressure is 0.3-0.4 MPa, adding pre-reduction gas formed after mixing at the temperature of 850 ℃, introducing the pre-reduction gas into a hot cyclone dust removal system 4 for dust removal, introducing the pre-reduction furnace 9 to produce sponge iron, and supplying smelting raw materials for a melting gasifier.
Two independent channels can be arranged in the hot cyclone dust removal system 4 and are used for independently conveying the second high-temperature gas stream and the first high-temperature gas stream.
The material discharged from the pre-reduction furnace 9 is also called sponge iron or direct reduced iron, and the metallization rate is generally low, and is usually 45-70%.
(2) Another oneThe temperature of the strand coal gas (first high-temperature coal gas stream) is 1000-1050 ℃, the pressure is 0.3-0.4 MPa, and CO + H in the coal gas2The volume ratio of the cyclone dust collector is 90-92%, and the cyclone dust collector is directly introduced into a hot cyclone dust collection system 4 for dust collection; meanwhile, the gas discharged from the top of the external direct reduction shaft furnace 5 is purified and cooled by a gas washing and dust removing system 6, then is pressurized and enters a gas decarburization system 8. The gas decarbonization system 8 adopts a vacuum pressure swing adsorption system, and because the temperature of the gas at the inlet of the gas decarbonization system 8 is required to be less than or equal to 40 ℃ and the pressure is more than or equal to 0.3MPa, the purified and cooled gas discharged from the top of the direct reduction shaft furnace 5 is pressurized to 0.3-0.4 MPa by a pressurizing machine and then cooled to the temperature of less than or equal to 40 ℃ by the pressurizing machine, so that the gas can enter the gas decarbonization system 8 to further remove CO2。
(3) Removing CO from coal gas by a coal gas decarbonization system2Then, CO + H in the decarbonated gas2The volume ratio of the hot cyclone dust removal system to the reduction gas is more than or equal to 90 percent, the output decarbonization gas is mixed with the gas which is dedusted by the hot cyclone dust removal system 4 according to a certain volume ratio by adjusting the flow of the returned cold gas according to the specific working condition of the shaft furnace process to form the flow and the temperature of the reduction gas which meet the requirements of the shaft furnace for reducing different iron ores, and the flow of the reduction gas is generally controlled to be 1700-2200 Nm3The temperature of the reducing gas is generally 850-1000 ℃ in the range of/t-DRI, the reducing temperature is generally 850-900 ℃ for oxidized pellets or lump ores prepared from common hematite and magnetite, and the reducing temperature is generally 900-1000 ℃ for vanadium titano-magnetite with a complex occurrence structure. The output proportion of the mixed return cold coal gas of the decarbonization gas needs to be comprehensively considered according to the high-temperature coal gas flow and coal gas components output by the smelting gasification furnace process of the Europe and metallurgy furnace, the specific working condition of the production of the shaft furnace and other factors, the proportion of the output return cold coal gas can be adjusted within the range of 0-100% of the total amount of the decarbonization gas, and the metallization rate of the iron ore in the direct reduction shaft furnace is more than 90%.
(4) CO removal via a gas decarbonization system 82Most of the decarbonized gas is mixed with high-temperature gas output by hot cyclone dust removal to form reducing gas, and the reducing gas is introduced into the shaft furnace, and the rest decarbonized gas (root) isDetermined by the working condition of the actual shaft furnace, the decarburization is carried out under the condition that the decarburization gas is surplus) can be output as high-quality gas, used as reducing gas of a pre-reduction furnace or merged into a gas pipe network inside a steel mill or supplied externally, and the use is flexible.
(5) The reducing gas meeting the requirements of the shaft furnace enters a direct reduction shaft furnace, the reducing gas and the iron ore are subjected to reduction reaction in the furnace to generate direct reduced iron, the reacted gas is discharged from the top of the shaft furnace, and CO + H remained in the top gas is discharged2Generally, the volume of the dust is 50-60 percent, and the dust is cooled and removed by a gas washing and dust removing system, wherein a wet dust removal annular seam washer can be used for dust removal and cooling, and a dry cloth bag dust removal and water spraying combined mode can also be used. The direct reduced iron generated in the shaft furnace can be discharged in a Hot Direct Reduced Iron (HDRI) or Cold Direct Reduced Iron (CDRI) mode according to the user requirement, and is directly sent to a steel mill for use or is transported to a finished product bin for stockpiling and selling.
To sum up, the utility model discloses following beneficial effect has at least:
1. the process flow ensures the normal production of the smelting reduction device of the Europe smelting furnace, and simultaneously, high-quality direct reduced iron is additionally produced, the flow system configuration is simple, the high-quality coal gas output by the gasification furnace is fully utilized, the investment cost of the reducing gas preparation system for the shaft furnace is further reduced, meanwhile, higher-quality direct reduced iron can be obtained, and the economic benefit and the market competitive advantage of the system are improved.
2. Because the quality of the coal gas output by the system is better, the external direct shaft furnace iron ore can adopt common hematite, magnetite or low-grade vanadium-titanium magnetite or lump ore which is difficult to reduce, the applicability of the iron ore is wider, and the cost can be reduced from the adaptability of raw materials.
3. The system realizes the recycling of the coal gas at the outlet of the direct reduction shaft furnace, can reduce the unit consumption of the output coal gas of the smelting gasification furnace of the Ou-smelting furnace required for producing direct reduced iron, saves the gas consumption and reduces the manufacturing cost.
4. The system directly reduces the coal gas at the outlet of the shaft furnace, except that most of the circulating reflux is used for producing the directly reduced iron by the shaft furnace, the abundant part can also be used as the reducing gas of a pre-reducing furnace or be merged into a coal gas pipe network in a steel mill, the system is comprehensively used for heating furnaces of sintering plants, pelletizing plants, blast furnace hot blast furnaces or other smelting processes, and the like, and the coal gas is flexibly utilized.
The utility model discloses not only the flow configuration is simple, still make full use of the ou ye stove melting gasifier output coal gas, outside direct reduction shaft furnace export coal gas has also obtained circulation and comprehensive utilization simultaneously, and whole flow economy is reliable, and each flow process unit all adopts ripe domestic equipment technique, easy maintenance, effective reduction investment cost.
To sum up, the utility model discloses an utilize system of ou metallurgical stove gasifier output coal gas production direct reduction iron, its route is: mixing one coal gas (a second high-temperature coal gas stream) with cooling gas added with a cooling gas pipe to reduce the temperature, entering a hot cyclone dust removal system, conveying the dust-removed coal gas to a pre-reduction furnace at the upper part of the smelting gasifier to pre-reduce iron ores, and supplying an iron raw material to the smelting gasifier; and another coal gas (a first high-temperature coal gas stream) directly enters a hot cyclone dust removal system, the dedusted high-temperature coal gas and the returned cold coal gas which is discharged from the direct reduction shaft furnace and is treated by a coal gas washing and dust removal system, a coal gas pressurization system and a coal gas decarburization system are mixed according to a certain proportion, and the flow of the returned cold coal gas is controlled to form reducing gas which meets the requirements of temperature, flow and the like required by reducing iron ore, and then the reducing gas enters the shaft furnace to reduce the iron ore to produce direct reduced iron. The system additionally produces the direct reduced iron by utilizing the high-quality coal gas output by the smelting gasification furnace of the Eustoma furnace, and has the advantages of good quality of the output coal gas, simple configuration of a coal gas treatment system, reduction of the investment cost of a reduced gas preparation system, production of the direct reduced iron with higher quality, simple process flow, localization of equipment technology, effective reduction of the manufacturing cost of a flow system, and improvement of the overall economic benefit and market competitiveness.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. A system for producing direct reduced iron by utilizing output coal gas of an Ou-smelting furnace gasifier is characterized by comprising the Ou-smelting furnace gasifier,
the gasification furnace of the pyrometallurgical furnace comprises a first high-temperature coal gas output pipeline and a second high-temperature coal gas output pipeline;
the first high-temperature coal gas output pipeline and the second high-temperature coal gas output pipeline are respectively and independently communicated with the thermal cyclone dust removal system;
and the direct reduction shaft furnace is communicated with the hot cyclone dust removal system.
2. The system for producing direct reduced iron by using output coal gas of an Ou-smelting furnace gasifier according to claim 1, wherein: the direct reduction shaft furnace is communicated with a coal gas washing and dust removing system which is used for washing and removing dust of the coal gas.
3. The system for producing direct reduced iron by using output coal gas of the euler furnace gasifier according to claim 2, wherein: the coal gas washing and dust removing system comprises a wet dust removing circular seam washer.
4. The system for producing direct reduced iron by using output coal gas of the euler furnace gasifier according to claim 2, wherein: the coal gas washing and dust removing system comprises a dry cloth bag dust remover and a water sprayer.
5. The system for producing direct reduced iron by using output coal gas of the euler furnace gasifier according to claim 2, wherein: and the coal gas pressurization system is communicated with the coal gas washing and dust removal system.
6. The system for producing direct reduced iron by using output coal gas of the euler furnace gasifier according to claim 5, wherein: the coal gas decarbonization system is communicated with the coal gas pressurization system.
7. The system for producing direct reduced iron by using output coal gas of the euler furnace gasifier according to claim 6, wherein: the coal gas decarburization system is communicated to an air inlet pipeline of the direct reduction shaft furnace.
8. The system for producing direct reduced iron by using output coal gas of the euler furnace gasifier according to claim 6, wherein: the gas decarburization system is also communicated to the pre-reduction furnace or an external pipeline.
9. The system for producing direct reduced iron by using output coal gas of an Ou-smelting furnace gasifier according to claim 1, wherein: the system also comprises a pre-reduction furnace communicated with the hot cyclone dust removal system.
10. The system for producing direct reduced iron by using output coal gas of the euler furnace gasifier according to claim 9, wherein: and the gas outlet end of the pre-reduction furnace is communicated with a gas washing and pressurizing system for washing and pressurizing the gas output by the pre-reduction furnace, the gas outlet end of the gas washing and pressurizing system is communicated with a second high-temperature gas inlet pipeline of the hot cyclone dust removal system, and the gas output by the gas washing and pressurizing system is mixed with the second high-temperature gas stream to cool the second high-temperature gas stream.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112210636A (en) * | 2020-10-09 | 2021-01-12 | 新疆八一钢铁股份有限公司 | Device for strengthening central gas flow of reduction furnace of Ou metallurgical furnace |
| CN112210636B (en) * | 2020-10-09 | 2024-05-24 | 新疆八一钢铁股份有限公司 | Device for strengthening central gas flow of reduction furnace of European smelting furnace |
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2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112210636A (en) * | 2020-10-09 | 2021-01-12 | 新疆八一钢铁股份有限公司 | Device for strengthening central gas flow of reduction furnace of Ou metallurgical furnace |
| CN112210636B (en) * | 2020-10-09 | 2024-05-24 | 新疆八一钢铁股份有限公司 | Device for strengthening central gas flow of reduction furnace of European smelting furnace |
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