CN207537478U - A kind of system using high-temperature gas-cooled reactor heat supply production sponge iron - Google Patents
A kind of system using high-temperature gas-cooled reactor heat supply production sponge iron Download PDFInfo
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- CN207537478U CN207537478U CN201720647962.5U CN201720647962U CN207537478U CN 207537478 U CN207537478 U CN 207537478U CN 201720647962 U CN201720647962 U CN 201720647962U CN 207537478 U CN207537478 U CN 207537478U
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- gas
- cooled reactor
- temperature gas
- heat exchanger
- sponge iron
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/10—Reduction of greenhouse gas [GHG] emissions
- Y02P10/122—Reduction of greenhouse gas [GHG] emissions by capturing or storing CO2
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/10—Reduction of greenhouse gas [GHG] emissions
- Y02P10/143—Reduction of greenhouse gas [GHG] emissions of methane [CH4]
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Abstract
The utility model discloses it is a kind of using high-temperature gas-cooled reactor heat supply production sponge iron system, comprising：Shaft furnace, the upper air vent of shaft furnace are connected by pipeline with deduster；Deduster by pipeline successively with steam generator, CO2Remover, humidifier and Intermediate Heat Exchanger are connected；Intermediate Heat Exchanger has first entrance, second entrance, first outlet, second outlet；First entrance is connected with the outlet of humidifier, and first outlet is connected by pipeline with the lower part air inlet of shaft furnace；Second entrance and second outlet are connected respectively by pipeline with the exit and entrance of high-temperature gas-cooled reactor.The utility model, as Direct Reducing Iron Process energy source, can be reduced the consumption of natural gas in technical process, coke-stove gas, can effectively reduce CO using clean nuclear energy2Discharge.
Description
Technical field
It is more particularly to a kind of to produce sponge iron using high-temperature gas-cooled reactor heat supply the utility model is related to field of metallurgy
System.
Background technology
China is steel big producer, and China mainland crude steel yield is 8.04 hundred million tons within 2015, accounts for global total output
49.5%.But steel industry unreasonable structure, iron steel ratio is high, electric steel ratio is small, and the special rolling shapes in part also need
Import.What China's pig iron yield was mainly produced based on the long flow of blast furnace ironmaking-pneumatic steelmaking, energy consumption is big, CO2
Discharge is high.Gas-based shaft kiln directly reduced technology has obtained ripe application as main non-blast furnace ironmaking technology in foreign countries, has
Low energy consumption, two highly energy-consumings of sintering, coking for being related to without blast furnace ironmaking, high pollution process.With flow is short, energy-saving and emission-reduction
Advantage with obvious effects is to improve steel products structure, improves steel products quality, realizes the important production skill that cleaning is smelted
Art.
Compared with the isometric flow of blast furnace, gas-based shaft kiln directly reduced technology can effectively reduce CO2Discharge.But with regard to its own
It says, natural gas reformer institute calorific requirement whole source comes from the burning of natural gas and top gas in the technique, still generates big
The CO of amount2Gas is discharged into air, brings serious environmental problem.Gas-based shaft kiln mainly has III technique of Midrex and HYL-,
Also Primordial Qi, and then reducing iron ore is mainly produced using reforming method outside natural gas.Using external reformer in technique, with Ni
The noble metals such as base produce reduction gas as catalyst, catalytic reforming methane.It is several for using producing sponge iron by using coke oven gas technique
It is to be mixed into unstripped gas with coke-stove gas after the furnace roof gas disposal by shaft furnace, is then carried out in external high temperature reformers
Conversion, makes CH4With vapor, CO2Conversion reaction generation CO and H occurs2.Such method needs reburner, while to H2/ CO's
Ratio requirement is more stringent, and methane conversion needs such as Ni bases precious metal catalyst, and investment, operating cost are higher.
Nuclear energy has the advantages that energy density is high as a kind of clean primary energy.At present, nuclear energy technology is utilized at home
Multiple nuclear power stations have been had, and have entered the commercial operation stage.The generation process of nuclear energy is not to environmental emission greenhouse gases and other
Harmful waste is a kind of energy of no discharge, applied to ironmaking field, will effectively reduce the consumption of fossil energy, reduces CO2
Discharge.Modular pebble bed high temperature reactor has the safety good, efficient and use as one of forth generation gas-cooled reactor heap-type
Way extensively, and the advantages that suitable low capacity construction, is capable of providing sufficient heat.
In conclusion the technological process of the natural gas used both at home and abroad at present/coke-stove gas direct-reduction production sponge iron,
There are it is respective the defects of and deficiency, also need to be further improved.
Utility model content
Based on the above problem, sponge iron is produced using high-temperature gas-cooled reactor heat supply as follows the utility model proposes a kind of
System, comprising：
Shaft furnace, the upper air vent of shaft furnace are connected by pipeline with deduster；
Deduster by pipeline successively with steam generator, CO2Remover, humidifier and Intermediate Heat Exchanger are connected；
Intermediate Heat Exchanger has first entrance, second entrance, first outlet, second outlet；
First entrance is connected with the outlet of humidifier, and first outlet is connected by pipeline with the lower part air inlet of shaft furnace；
Second entrance and second outlet are connected respectively by pipeline with the exit and entrance of high-temperature gas-cooled reactor.
One embodiment according to the present utility model, multiple double-deck heat exchanger tubes arranged in parallel in Intermediate Heat Exchanger.
One embodiment according to the present utility model, double-deck heat exchanger tube has heat transfer tube wall and heat exchange pipe outer wall, inside and outside
Filled with liquid alloy between wall, liquid alloy is preferably gallium-indium-tin alloy.
One embodiment according to the present utility model, Intermediate Heat Exchanger have discharge duct, the connection of discharge duct terminal part
There is gas analysis arrangement.
One embodiment according to the present utility model, the bottom of Intermediate Heat Exchanger have heavy alloy support construction.
One embodiment according to the present utility model, high-temperature gas-cooled reactor is using helium as circulating coolant.
One embodiment according to the present utility model is connected with spray oxygen temperature-raising device between Intermediate Heat Exchanger and shaft furnace.
One embodiment according to the present utility model, helium are passed through by second entrance and by second outlet pass-outs.
One embodiment according to the present utility model, the top gas generated in reduction process are arranged by the upper air vent of shaft furnace
Go out.
One embodiment according to the present utility model, the top gas discharged by upper air vent are dusted by deduster,
Steam generator is subsequently entered, vapor is generated and provides raw material for the reforming reaction of methane and vapor.
One embodiment according to the present utility model, the top gas after dedusting is in CO2Decarburization and and coke-oven coal in remover
Gas, top gas mix to reuse.
The invention also discloses a kind of methods using above system production sponge iron, comprise the steps of：
Helium is existed by the entrance of high-temperature gas-cooled reactor with the second entrance of outlet and heat exchanger and second outlet
It is recycled between high-temperature gas-cooled reactor and heat exchanger；
The as-fired coal gas of shaft furnace is passed into heat exchanger by first entrance and passes through first outlet pass-out, as-fired coal gas with
Helium carries out heat exchange and is heated in heat exchanger, and the mode of heat exchange is to enter from the high temperature helium of gas-cooled reactor pass-out
To Intermediate Heat Exchanger and Intermediate Heat Exchanger is transferred heat to, and as-fired coal gas is transferred heat to by Intermediate Heat Exchanger；
The as-fired coal gas heated is passed through from the lower part air inlet of shaft furnace；
In shaft furnace under the catalytic action of high-temperature sponge iron, the reforming reaction for carrying out methane and vapor generates as-fired coal gas
Also Primordial Qi, and iron ore is restored to obtain sponge iron.
One embodiment according to the present utility model, the top gas generated in reduction process are arranged by the upper air vent of shaft furnace
Go out.
One embodiment according to the present utility model, after as-fired coal gas is mixed by coke-stove gas, top gas and vapor
And by being formed after humidifier supplement vapor.
One embodiment according to the present utility model, as-fired coal gas are sprayed before shaft furnace is passed through by spraying oxygen temperature-raising device
Oxygen operates the temperature to improve as-fired coal gas.
One embodiment according to the present utility model, as-fired coal gas carries out methane in shaft furnace and the reformation of vapor is anti-
Should, during Primordial Qi rises in shaft furnace with high-temperature sponge iron reduction reaction occurs for going back for generation.
One embodiment according to the present utility model, the top gas discharged by upper air vent are dusted by deduster,
Steam generator is subsequently entered, vapor is generated and provides raw material for the reforming reaction of methane and vapor.
One embodiment according to the present utility model, the top gas after dedusting is in CO2Decarburization and and coke-oven coal in remover
Gas, top gas mix to reuse.
By using above-mentioned technical proposal, following many advantageous effects are achieved：
The utility model, as Direct Reducing Iron Process energy source, can reduce day in technical process using clean nuclear energy
The consumption of right gas, coke-stove gas, can effectively reduce CO2Discharge.The high warm that high temperature gas cooled reactor technology generates, can incite somebody to action
As-fired coal gas is heated to the temperature of requirement, ensures that reaction in furnace has good dynamic conditions.Using being restored in vertical furnace
Fresh sponge iron catalytic action and utilize sponge iron and CH4Carburization reaction, make the CH in coal gas4It is converted in shaft furnace
Modification generates CO and H2, avoid the investment of External reforming stove and the consumption costs of the precious metal catalysts such as Ni bases.Entire
In technological process, by CO in top gas2Absorption, can be passed through in stove and recycle again.All CO and H in the flow2
It is completely used for making also Primordial Qi, improves reduction gas utilization rate, reduce the consumption of as-fired coal gas, it is energy saving.Using vapor
Reformation can improve H in also Primordial Qi2Content, H2The vapor that reducing iron ore generates is environmentally safe, reduces CO2Discharge.
Description of the drawings
The above-mentioned and/or additional aspect and advantage of the utility model are in the description carried out to embodiment is combined with attached drawing
It will be apparent from and be readily appreciated that, wherein：
Fig. 1 is shown produces sponge iron according to the utility model one embodiment using high-temperature gas-cooled reactor heat supply
The structure diagram of system.
It is using high-temperature gas-cooled reactor heat supply production sponge iron Fig. 2 shows embodiment according to the present utility model
The structure diagram of the heat exchanger of system.
Specific embodiment
It should be appreciated that the embodiment of shown the utility model is merely illustrative in the exemplary embodiment.Although
Only a small number of embodiments are described in detail in the utility model, but those skilled in the art are readily appreciated that and are taken off in not essence
In the case of introduction from the utility model theme, a variety of modifications are feasible.Correspondingly, all such modifications should all be wrapped
It includes in the scope of the utility model.In the case where not departing from the purport of the utility model, following exemplary can be implemented
Design, operating condition and parameter of example etc. make others and replace, change, change and delete.
The production system of sponge iron as shown in Figure 1, including shaft furnace 1, deduster 2, steam generator 3, CO2Remover 4,
Humidifier 5, Intermediate Heat Exchanger 6 and in the present embodiment be high temperature pebble-bed gas-cooled reactor 7 nuclear reactor.Shaft furnace 1 has gas
Body entrance and gas vent, gas vent successively with deduster 2, steam generator 3, CO2Remover 4, humidifier 5, centre
The gas access of heat exchanger 6 and shaft furnace 1 is connected with pipeline.
For high temperature pebble-bed gas-cooled reactor 7 using inert gas helium as circulating cooling gas, core exit helium temperature is 950
DEG C, pressure 3MPa can be coke-stove gas from reforming reaction high-temperature heat supply.
High temperature helium enters the Intermediate Heat Exchanger 6 between high temperature gas cooled reactor 7 and shaft furnace 1, and high temperature heat is passed to centre
Heat exchanger 6.The as-fired coal gas of shaft furnace 1 is passed through Intermediate Heat Exchanger 6 and is heated to 920 DEG C, and as-fired coal atmospheric pressure is 0.4MPa.Therefrom
Between 6 pass-out of heat exchanger high temperature as-fired coal gas use again spray oxygen temperature-raising device (not shown) carry out spray oxygen carried with partial oxidation
Wen Hou, temperature are improved to 1020 DEG C.Shaft furnace 1 is subsequently passed, methane is carried out under the catalytic action of the high-temperature sponge iron in shaft furnace 1
With vapor from reforming reaction, also Primordial Qi reducing iron ore in uphill process of generation obtains sponge iron product.Wherein enter
Producer gas ingredient is：40.4% H2, 15.6% CO, 24.7% CH4, 2.5% CO2, 4.8% vapor, 12%
N2.350~400 DEG C of shaft furnace top gas ingredient is：32.6% H2, 12.2% CO, 12.6% CH4, 9.7% CO2、
9.3% N2, 23.5% vapor.After 2 dedusting of cyclone dust collectors, top gas enters steam generator 3 and produces low temperature
Steam, to provide part material from reforming reaction in shaft furnace 1, the vapor that remaining reaction needs is supplemented by humidifier 5.Through
Later continue pressurization and CO2The top gas that the processes such as 4 decarburization of remover are handled can be mixed with natural gas, vapor as weight
The as-fired coal gas of whole reaction is to recycle.
Due to using cooling gas of the high temperature gas cooled reactor 7 using helium as nuclear reactor in the utility model.It such as uses and commonly changes
Hot device, since two-way gas is run under high temperature and high pressure condition in the utility model, CO, H in cold also Primordial Qi2Deng easily
By exchanging heat, tube wall is spread, high temperature gas-cooled into the circulated helium system of high temperature gas cooled reactor, and as equipment is constantly run
CO, H2 equal size are continuously increased in the circulated helium system of heap, these foreign gases are mixed into, and the safety of high temperature gas cooled reactor is transported
Row forms harm, it is therefore desirable to design the centre of the circulated helium system of a set of high temperature gas cooled reactor for preventing pernicious gas from entering
Heat exchanger 6.
As shown in Fig. 2, the Intermediate Heat Exchanger 6 of the utility model is round or any other proper shape, including the
One entrance 61, first entrance 61 are located at the lower part of Intermediate Heat Exchanger 6, for accessing cold also Primordial Qi；First outlet 62, first outlet
62 are located at the top of Intermediate Heat Exchanger 6, for exporting thermal reduction gas；Second entrance 63, second entrance 63 are located at Intermediate Heat Exchanger 6
The lower part of side, for accessing high temperature helium；Second outlet 64, second outlet 64 are located at the top of 6 opposite side of Intermediate Heat Exchanger
For exporting low-temperature helium；Heat exchanger tube longitudinal arrangement inside heat exchanger, each heat exchanger tube has inner wall 68 and outer wall 67, interior
It is liquid alloy 66 between outer wall；There is heavy alloy support construction 65 and connection liquid to close for the bottom of Intermediate Heat Exchanger 6
The discharge duct 691 of golden gas phase zone 69, the terminal part connection gas analysis arrangement of discharge duct 691.
Cold also Primordial Qi is entered by the first entrance 61 of Intermediate Heat Exchanger 6 in heat exchanger tube, is heated up under high-temperature heat exchange tube heating
To 900~950 DEG C, the high temperature reduction gas after heating is discharged by the first outlet 62 at top.
High temperature helium enters the heat exchanger tube external space by second entrance 63, heat is passed in pipe outside by pipe, wherein heat exchanger tube
It is low melting point liquid alloy 66 between inner wall 68 and outer wall 67, excellent thermal conductivity, boiling point height.
Further low melting point liquid alloy 66 can be gallium-indium-tin alloy, and boiling point is at 1200 DEG C or more.Each ingredient also in Primordial Qi
Liquid alloy fill area is diffused into through heat transfer tube wall 68 at high temperature under high pressure, in liquid alloy 66, air accumulation floats,
Certain density mixed gas, the space externally connected exhaust pipe road 691, promoting the circulation of qi body reality of going forward side by side are formed in liquid alloy gas phase zone 69
When analyze, as H in the region gas phase2When content is higher, then liquid alloy 66 in the region is replaced, and will contained certain
H2Liquid alloy carry out Dehydroepiandrosterone derivative, then recycled.
The above is only the preferred embodiment of the present invention, is not used for limiting the scope of the utility model；
If not departing from the spirit and scope of the utility model, the utility model is modified or replaced equivalently, should all be covered
In the protection domain of the utility model claims.
Claims (10)
1. a kind of system using high-temperature gas-cooled reactor heat supply production sponge iron, which is characterized in that include：
Shaft furnace, the upper air vent of the shaft furnace are connected by pipeline with deduster；
The deduster by pipeline successively with steam generator, CO2Remover, humidifier and Intermediate Heat Exchanger are connected；
The Intermediate Heat Exchanger has first entrance, second entrance, first outlet, second outlet；
The first entrance is connected with the outlet of the humidifier, the first outlet by the lower part of pipeline and the shaft furnace into
Gas port is connected；
The second entrance and second outlet are connected respectively by pipeline with the exit and entrance of the high-temperature gas-cooled reactor.
2. the system according to claim 1 using high-temperature gas-cooled reactor heat supply production sponge iron, which is characterized in that institute
High-temperature gas-cooled reactor is stated using helium as circulating coolant.
3. the system according to claim 1 using high-temperature gas-cooled reactor heat supply production sponge iron, which is characterized in that institute
It states and spray oxygen temperature-raising device is connected between Intermediate Heat Exchanger and the shaft furnace.
4. the system according to claim 2 using high-temperature gas-cooled reactor heat supply production sponge iron, which is characterized in that institute
Helium is stated to be passed through by second entrance and by second outlet pass-out.
5. the system according to claim 1 using high-temperature gas-cooled reactor heat supply production sponge iron, which is characterized in that institute
State multiple double-deck heat exchanger tubes arranged in parallel in Intermediate Heat Exchanger.
6. the system according to claim 5 using high-temperature gas-cooled reactor heat supply production sponge iron, which is characterized in that institute
Stating double-deck heat exchanger tube has heat transfer tube wall and heat exchange pipe outer wall, and liquid alloy is filled between inside and outside wall.
7. the system according to claim 1 using high-temperature gas-cooled reactor heat supply production sponge iron, which is characterized in that institute
Intermediate Heat Exchanger is stated with discharge duct, discharge duct terminal part is connected with gas analysis arrangement.
8. the system according to claim 1 using high-temperature gas-cooled reactor heat supply production sponge iron, which is characterized in that institute
The bottom for stating Intermediate Heat Exchanger has heavy alloy support construction.
9. the system according to claim 1 using high-temperature gas-cooled reactor heat supply production sponge iron, which is characterized in that also
The top gas generated during former is discharged by the upper air vent of shaft furnace.
10. the system according to claim 9 using high-temperature gas-cooled reactor heat supply production sponge iron, which is characterized in that
Processing is dusted by deduster by the top gas that the upper air vent is discharged.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720647962.5U CN207537478U (en) | 2017-06-06 | 2017-06-06 | A kind of system using high-temperature gas-cooled reactor heat supply production sponge iron |
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| CN201720647962.5U CN207537478U (en) | 2017-06-06 | 2017-06-06 | A kind of system using high-temperature gas-cooled reactor heat supply production sponge iron |
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| CN207537478U true CN207537478U (en) | 2018-06-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111979371A (en) * | 2020-07-31 | 2020-11-24 | 太原理工大成工程有限公司 | Method for distributed utilization of heat in process of producing direct reduced iron by dry quenching coupled shaft furnace |
-
2017
- 2017-06-06 CN CN201720647962.5U patent/CN207537478U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111979371A (en) * | 2020-07-31 | 2020-11-24 | 太原理工大成工程有限公司 | Method for distributed utilization of heat in process of producing direct reduced iron by dry quenching coupled shaft furnace |
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