CN107022659A - High-temperature slag waste heat gradient recycling system - Google Patents
High-temperature slag waste heat gradient recycling system Download PDFInfo
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- CN107022659A CN107022659A CN201710324780.9A CN201710324780A CN107022659A CN 107022659 A CN107022659 A CN 107022659A CN 201710324780 A CN201710324780 A CN 201710324780A CN 107022659 A CN107022659 A CN 107022659A
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- slag
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- chuck
- temperature
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- 239000002893 slag Substances 0.000 title claims abstract description 133
- 239000002918 waste heat Substances 0.000 title claims abstract description 29
- 238000004064 recycling Methods 0.000 title claims abstract description 13
- 239000007789 gas Substances 0.000 claims abstract description 66
- 238000006243 chemical reaction Methods 0.000 claims abstract description 30
- 238000011084 recovery Methods 0.000 claims abstract description 23
- 238000005469 granulation Methods 0.000 claims abstract description 14
- 230000003179 granulation Effects 0.000 claims abstract description 14
- 230000008878 coupling Effects 0.000 claims abstract description 13
- 238000010168 coupling process Methods 0.000 claims abstract description 13
- 238000005859 coupling reaction Methods 0.000 claims abstract description 13
- 238000006276 transfer reaction Methods 0.000 claims abstract description 10
- 239000002245 particle Substances 0.000 claims description 29
- 239000003054 catalyst Substances 0.000 claims description 27
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 8
- 239000001257 hydrogen Substances 0.000 claims description 8
- 229910052739 hydrogen Inorganic materials 0.000 claims description 8
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 5
- 239000011449 brick Substances 0.000 claims description 5
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 4
- 230000003750 conditioning effect Effects 0.000 claims description 3
- 230000008020 evaporation Effects 0.000 claims description 3
- 238000001704 evaporation Methods 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 2
- 238000009413 insulation Methods 0.000 claims description 2
- 238000007711 solidification Methods 0.000 claims description 2
- 230000008023 solidification Effects 0.000 claims description 2
- 238000012546 transfer Methods 0.000 claims description 2
- 238000005842 biochemical reaction Methods 0.000 claims 1
- 239000007787 solid Substances 0.000 claims 1
- 238000007908 dry granulation Methods 0.000 abstract description 8
- 230000006872 improvement Effects 0.000 abstract description 3
- 238000002407 reforming Methods 0.000 abstract description 3
- 230000009467 reduction Effects 0.000 abstract description 2
- 238000004134 energy conservation Methods 0.000 abstract 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 18
- 229910002092 carbon dioxide Inorganic materials 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 5
- 239000003818 cinder Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 3
- 229910052708 sodium Inorganic materials 0.000 description 3
- 239000011734 sodium Substances 0.000 description 3
- 238000000629 steam reforming Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000003317 industrial substance Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B3/00—General features in the manufacture of pig-iron
- C21B3/04—Recovery of by-products, e.g. slag
- C21B3/06—Treatment of liquid slag
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B3/00—General features in the manufacture of pig-iron
- C21B3/04—Recovery of by-products, e.g. slag
- C21B3/06—Treatment of liquid slag
- C21B3/08—Cooling slag
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
-
- 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]
-
- 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
- Y02P10/20—Recycling
-
- 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
- Y02P10/25—Process efficiency
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Processing Of Solid Wastes (AREA)
- Furnace Details (AREA)
Abstract
The invention discloses a high-temperature slag waste heat step recycling system. The system comprises a disc type centrifugal granulation unit, a fixed bed heat transfer-reaction coupling unit (primary stage) and a rotary bed waste heat recovery unit (secondary stage), and can efficiently utilize high-quality waste heat rich in blast furnace slag. The invention also provides a novel efficient hot plate coupling reactor, which utilizes CO2/CH4Or CH4/H2Reforming of O to produce H2And CO gas, wherein the heat required by the chemical reaction in the reactor is provided by the waste heat of the high-temperature slag generated by dry granulation. The system is smoothly implemented, can realize effective utilization of high-temperature waste heat of the molten slag, and is of great importance to energy conservation and emission reduction of the metallurgical industry and improvement of energy utilization efficiency.
Description
Technical field
The invention belongs to heat recovery technology field, it is related to blast furnace cinder dry granulation heat recovery technology, more particularly to
A kind of methane reforming hydrogen making and carbon monoxide system based on high temperature hot plate coupled reactor.
Background technology
Steel industry has the features such as high energy consumption, maximum discharge and high pollution, and Steel Industrial energy consumption accounts for national total energy
The 10%~15% of consumption.Blast furnace slag is the main byproduct of steel and iron industry, and every 1 ton of steel about produces 300kg blast furnace slags, and it is come out of the stove
Temperature is at 1450 DEG C~1550 DEG C or so, and slag per ton about contains 1.8 × 106KJ waste heat (is cooled to 50 DEG C of meters from 1500 DEG C
Calculate).Chinese about 700,000,000 tons of pig iron yield in 2016, produces about 2.1 hundred million tons of blast furnace slag, if these waste heats all recycled,
Equivalent to 13,000,000 tons standard coals of heat (1 ton standard coal=29307.6 kilojoule) contained by it, about 20,000,000 tons of CO of emission reduction2With
A large amount of SO2、H2The atmosphere pollutions such as S.Therefore, melting slag waste heat is effectively reclaimed, pollution of the steel industry to environment is reduced, in energy
Source is in short supply and environmental problem seems particularly significant increasingly serious today.
Compared to wet method, dry process realizes that slag quickly cools down granulation by machine power or high pressure draught, is prevented effectively from
Environmental pollution and energy waste caused by wet method, and slag particle also can as cement quality raw materials, in Sweden, the former Soviet Union, English
The state-owned marked improvement such as state, Japan and Australia.Centrifugal granulation method is dry granulation method most potential at present, is had
The advantage that single devices are simple, characteristics of compact layout, disposal ability are big etc., it is granulated room air and directly contacted with blast furnace slag, and inhales
Thermosetting high temperature air, temperature is up to more than 800 DEG C.The utilization of early stage is based on physical method, in recent years, and chemical method is received
Extensive concern.
Methane-steam reforming is the important channel that tradition produces hydrogen-rich synthetic gas, at present industrial more ripe system
Hydrogen technique, is also most simple and most economical hydrogen production process.Its reaction equation：
Its reaction condition mainly has temperature, pressure, steam/hydrocarbons ratio and catalyst etc..Industrially, reaction temperature is typically maintained
At 700 DEG C~900 DEG C.It is demonstrated experimentally that in methane steam reforming reaction, when temperature reaches 900 DEG C, methane possesses maximum conversion
Rate, up to 96%.Methane-steam reforming is the reaction of volume increase, and low pressure balance beneficial, low pressure can also suppress an oxygen
Change carbon analysis carbon reaction, but low pressure is favourable to methane cracking analysis carbon reaction balance, appropriate pressurization can suppress methane cracking.So often
Press (101.325kPa) reaction proper.Catalyst typically uses Ni base catalyst.
Methane reforming with carbon dioxide is also of great interest in recent years and studies.It is for alleviating industrial chemicals
It is significant with energy crisis, utilizes CO2In carbon resource alleviate greenhouse gas emissions, with making a silk purse out of a sow's ear, protect
Environment and the significance tapped a new source of energy.Its reaction equation：
Its reaction condition mainly has temperature, pressure and catalyst etc..Studies have shown that considers carbon distribution and financial cost, most
Good reaction temperature should be about 850 DEG C.Due to CO2Reform CH4Preparing synthetic gas belongs to the reversible reaction of volume increase, and reaction pressure is got over
Greatly, CH4And CO2Conversion ratio is lower, so pressure selection normal pressure (101.325kPa) is proper.Catalyst typically uses Ni bases
Catalyst.
Residual heat resources quality is high after slag centrifugal granulation, and the high temperature air of generation fully meets two above chemical reaction institute
Condition (the high temperature needed>800 DEG C, normal pressure~101.325kPa), based on this, this patent proposes the biography of high-temperature slag UTILIZATION OF VESIDUAL HEAT IN
Heat-chemistry reacts coupled system.
The content of the invention
For problems of the prior art, the invention provides a kind of new melting slag waste heat recovery system, its profit
The high temperature furnace slag obtained with Dry granulation of BF slag technology is as thermal source, by CO2/CH4Or CH4/H2O reacting gas preheat and
Catalyst action issues heat producing chemical reaction, the reaction produces hydrogen and carbon monoxide, it is possible to achieve cinder high-temperature waste heat has
Effect is utilized, to Energy-saving of Metallurgical Industry emission reduction, improves efficiency of energy utilization most important.
In order to realize foregoing invention purpose, the technical solution adopted in the present invention is described more than a kind of new type high temperature slag
Hot step recycling system, including disc centrifuge granulation unit, fixed-bed heat transfer-reaction coupling unit and revolution bed waste heat are returned
Receive unit, it is characterised in that：
Disc centrifuge granulation unit mainly include slag particle trapping cylinder, refractory brick, motor, rotating disk, charging aperture, molten slag groove,
Adapter.Slag particle trapping cylinder is cylindrical shape, and outer layer carries out isothermal holding, and inner lining material is refractory brick, and its top is provided with charging aperture.
Rotating disk is located in the middle part of slag particle trapping cylinder, blast furnace cinder by pipeline to above rotating disk, now slag temperature be about 1450~
1550℃.It is conveyer belt that slag particle collecting tank, which is located at slag particle to trap below bottom of cylinder, slag exit,.Slag passes through dry granulation
Afterwards, temperature is about 900~1100 DEG C, then by conveyer belt, is delivered to slag fixed bed.
Fixed-bed heat transfer-reaction coupling unit includes slag fixed bed and high temperature hot plate coupled reactor.Described slag
Fixed bed, which is used to receiving centrifugal granulation, gets off high temperature furnace slag, and slag discharge port is set below slag fixed bed.Described high temperature hot plate
The hot plate of coupled reactor is separated with dividing plate and the latter half is put within slag fixed bed, and phase transformation work is filled with hot plate
Metal clad sodium.The hot plate top half is cased with storing Ni base catalyst in chuck, and chuck, and this is the main field of reaction
Institute.Chuck is connected with gas import and export pipe, and lower pipeline is passed through CO2/CH4Or CH4/H2O reacting gas.During work, Ni in chuck
Base catalyst temperature is at 800 DEG C or so, and pressure is normal pressure.At high operating temperatures, CO2/CH4Or CH4/H2O reacting gas is in catalysis
Reacted in the presence of agent in chuck.After reaction hydrogen and carbon monoxide are discharged in upper pipeline.
The material of hot plate and chuck can be the good materials of heat conductivility such as 310S stainless steels or high temperature alloy.Wing inside hot plate
Sheet type can be the patterns such as straight, sawtooth, porous, shutter, and arrangement can be horizontally-arranged or tandem.
The heat cascade utilization of slag, slag from blast furnace discharge when temperature between 1450~1550 DEG C, initially enter disk
Temperature is between 900~1100 DEG C after formula centrifugal granulation unit dry granulation, granulation.First order heat (temperature 900~1100
DEG C) for the chemical reaction in high temperature hot plate coupled reactor, reaction terminates rear slag and is transported to revolution bed waste heat recovery list
Member, temperature is about 500 DEG C.Second level slag (temperature~500 DEG C) heat is used for preheating CO2/CH4Or CH4/H2O reacting gas.
Reacting gas is entered from revolution bed gas entrance with normal temperature, and temperature reaches after the slag preheating discharged in revolution bed through fixed bed
To 400~500 DEG C, about 50~60 DEG C of the slag discharge temperature after preheating.
The invention has the advantages that：
(1) Industry Waste can be effectively utilized as thermal source using the high-temperature slag after the processing of blast furnace cinder dry granulation
Heat provides heat for thermal chemical reaction, realizes the waste heat recovery of blast furnace cinder.
(2) slag is after dry granulation is handled, and step reclaims the remaining sensible heat of slag, is remarkably improved the utilization of the energy
Efficiency.
(3) present invention realizes that melting slag waste heat step is reclaimed：Fixed-bed heat transfer-reaction coupling unit is that waste heat one-level is reclaimed,
Slag temperature in primary unit drops to 500C or so from 900~1100C.It is secondary recovery to turn round bed waste heat recovery unit, is melted
Slag temperature in secondary recovery unit drops to 50~60C or so from 500C.So as to embody step recovery.
Brief description of the drawings
Fig. 1 is the system structure diagram of the embodiment of the present invention.
Fig. 2 is the structural representation of high temperature hot plate coupled reactor of the present invention.
Fig. 3 is the sectional view of hot plate and jacket portion in high temperature hot plate coupled reactor of the present invention.
Specific embodiment
Below in conjunction with drawings and Examples, the present invention is described in more detail.
As shown in figure 1, the exhaust heat stepped recycling system of high-temperature slag of the present invention, including disc centrifuge granulation unit
101st, fixed-bed heat transfer-reaction coupling unit 102 and revolution bed waste heat recovery unit 103.
Disc centrifuge granulation unit 101 includes slag particle outlet 1, slag particle trapping cylinder 2, refractory brick 3, charging aperture 4, molten slag groove
5th, adapter 6, rotating disk 7, power transmission shaft 8, motor 9, slag particle collecting tank 10, air intlet 11.
Fixed-bed heat transfer-reaction coupling unit 102 includes slag fixed bed 17, high temperature hot plate coupled reactor 13, wherein
Slag fixed bed 17 includes heat-insulation layer 19, slag exit 18.High temperature hot plate coupled reactor 13 includes chuck 12, gas inlet pipe
15th, gas outlet tube 14, hot plate 16 and dividing plate 20.
Turn round bed waste heat recovery unit 103 and include revolution bed 21, it is gas access 23, gas vent 25, slag entrance 24, molten
Slag outlet 22.
Specific operation process is as follows：
Air intlet 11 is connected with slag particle trapping cylinder 2 bottom, and slag particle trapping cylinder 2 is cylindrical, high-temperature liquid state slag
Tapping temperature is at 1450 DEG C~1550 DEG C or so, and slag is flowed into by molten slag groove 5 and adapter 6 by charging aperture 4 and is located at slag particle trapping
In the rotating disk 7 at the middle part of cylinder 2, centrifuge and depart from along the edge of rotating disk 7, rotating disk 7 is by being connected, and slag liquid film is broken at the edge of rotating disk 7
And fracture, air heat-exchange and quick solidification that the slag particle of formation is passed through with air intlet 11, slag particle trapping cylinder 2 prevent slag particle to
Fly away from outside, meanwhile, the slag particle trapping inner surface of cylinder 2 has one layer of refractory brick 3, slag particle to be fallen into after colliding slag particle trapping cylinder 2
The slag particle collecting tank 10 of slag particle trapping cylinder 2 bottom, is exported by slag exit 1.Slag fixed bed is delivered to by conveyer belt 26 again
17.Temperature is more than 800 DEG C when slag is exported.
While CO2/CH4Or CH4/H2O reacting gas enters from revolution bed gas entrance 23, from slag fixed bed outlet
The slag of 18 discharges enters revolution bed slag entrance 24, the gas that preheating gas entrance 23 enters in revolution bed 21.Gas is passed through
Temperature is between 400~500 DEG C after preheating.Then it is discharged into high temperature hot plate coupled reactor 13 from revolution bed gas outlet 25
Gas inlet pipe 15, slag after preheating discharges from revolution bed slag exit 22, about 50~60 DEG C of temperature.
The slag discharged by Unit 101 is delivered to slag fixed bed 17 by conveyer belt 26, while after the preheating of Unit 103
Mixed gas through piping enter gas inlet pipe 15.
Emphasis describes fixed-bed heat transfer-specific operation process of reaction coupling unit 102 below.High temperature hot plate coupled reactor
13 the latter half are that the latter half of hot plate 16 is put in slag fixed bed 17, and slag enters temperature after slag fixed bed 17 and existed
900~1100 DEG C, and fully contacted with the latter half of hot plate 16.Phase transformation working media metallic sodium, hot plate are placed with hot plate 16
16 top halfs are cased with chuck 12, and chuck 12 is connected with gas inlet pipe 15, gas outlet tube 14.Placed in chuck 12 for heat
Chemically react Ni base catalyst.After slag is fully contacted with the latter half of hot plate 16, the working media in heating hot plate 16, work
Medium evaporation, which is flowed up, to be risen the top half temperature of hot plate 16 and delivers heat to the Ni base catalyst in chuck 12；By revolution
Reacting gas (the CO of the preheating of bed 212/CH4Or CH4/H2O) enter at gas inlet pipe 15, and be passed through chuck 12 and catalyst
Contact, heat producing chemical reaction is issued in two conditionings of high temperature and Ni bases catalyst, produces hydrogen and carbon monoxide from gas
Outlet 14 is discharged.Slag is discharged on conveyer belt 27 after heat exchange by slag fixed bed outlet 18, and it is molten to enter revolution bed
Slag entrance 24.
The structural representation of the high temperature hot plate coupled reactor 13 of the present invention is as shown in Fig. 2 be divided into hot plate 16, dividing plate 20,
Chuck 12, gas inlet pipe 15, gas outlet tube 14 and adapter 28.Hot plate 16 is hollow design, is made up of two cover plates, top
Provided with adapter 28, for hot plate to be evacuated and working media metallic sodium is filled.Adapter 28 seal mode can for welding or
Sealing plierses etc. can reach completely closely sealed encapsulation.20 points by dividing plate of hot plate 16 is two parts up and down, the outside envelope of upper part
Closed loop is in hollow chuck 12, lower partial insertion slag fixed bed 17.Load catalyst, and each chuck 12 in chuck 12
It is provided with inlet and outlet.Import and export are welded with gas inlet pipe 15 and gas outlet tube 14.Arrow, which is pointed to, in Fig. 2 represents medium
Flow direction.During work, the slag in slag fixed bed 17 delivers heat to hot plate bottom, the working media of hot plate bottom is absorbed heat
Amount, evaporation turns into steam, moves to the top of hot plate 16 and discharges heat to the catalyst in chuck 12 and reacting gas, condenses simultaneously
As liquid, and so on circulate, heat is continually passed in chuck.The reacting gas by preheating is entered by gas simultaneously
The catalyst that mouthful pipe 15 enters in chuck 12, with chuck 12 hybrid concurrency life reaction at high temperature, reacted gas is from gas
Outlet 14 is discharged.
Reference picture 3, hot plate 16 is made up of cover plate 29 and cover plate 30, and inside is provided with fin 31, and top is provided with adapter 28.Fin
Type can be the patterns such as straight, sawtooth, porous, shutter, and arrangement can be horizontally-arranged or tandem.Material can be 310S stainless steels
Or the good material of heat conductivility such as high temperature alloy.Connected between cover plate 29 and cover plate 30 and fin 31 using vacuum brazing mode
Connect；Using the connected mode commonly welded between adapter 28 and hot plate 16.Top half outside cover plate 29 and 30 is cased with chuck 12,
The periphery that chuck 12 is enclosed in cover plate 29 and cover plate 30 by flat board 32,33,35,37,38,39, front shroud and back shroud 36 is constituted.
Catalyst 34,40 is porous media, and catalyst 34 is positioned between flat board 32, flat board 33, flat board 35, cover plate 29, catalyst 40
It is positioned between flat board 37, flat board 38, flat board 39, cover plate 30.Back shroud 36 is hollow, and gas can circulate therebetween.Reaction
Step is that gas is successively contacted by the entrance of gas inlet pipe 15 with porous media 34,40 and fully reacted.Reacted gas leads to
Gas outlet tube 14 is crossed to discharge.
The above embodiments are merely illustrative of the technical solutions of the present invention and it is unrestricted, core of the invention be fixed bed pass
Heat-reaction coupling unit and the melting slag waste heat recovery system, in the waste heat recovery that steel and iron industry can be applied to.The guarantor of the present invention
Protecting scope includes any replacement, modification, improvements and modifications on the premise of the principle of the invention and objective.
Claims (10)
1. a kind of exhaust heat stepped recycling system of high-temperature slag, it is characterised in that：Including disc centrifuge granulation unit (101),
Fixed-bed heat transfer-reaction coupling unit (102), revolution bed waste heat recovery unit (103) and conveyer belt.
2. the exhaust heat stepped recycling system of high-temperature slag according to claim 1, it is characterised in that：
The disc centrifuge granulation unit (101), including slag particle trapping cylinder (2), charging aperture (4), molten slag groove (5), adapter
(6), motor (9), slag particle collecting tank (10), conveyer belt (26), wherein,
High-temperature liquid state slag is flowed into by the molten slag groove (5) and adapter (6) and caught positioned at the slag particle by the charging aperture (4)
Collect in the rotating disk (7) in the middle part of cylinder (2), described slag particle trapping cylinder (2) inwall is covered with refractory brick (3)；Pass through power transmission shaft (8) band
Dynamic rotating disk (7) rotation, molten slag is departed from along after disk edge centrifugal granulation；What slag particle was passed through with air intake (11)
Quick solidification after air contact heat exchange；Solid-state slag particle falls into the slag particle collecting tank (10) after striking slag particle trapping cylinder (2)
Bottom, is exported, then be delivered to the fixed bed by the first conveyer belt (26) by the slag exit (1) of the slag particle collecting tank (10)
Heat transfer-reaction coupling unit (102).
3. the exhaust heat stepped recycling system of high-temperature slag according to claim 1, it is characterised in that：
The fixed-bed heat transfer-reaction coupling unit (102), including high temperature hot plate coupled reactor (13), slag fixed bed
(17), slag discharge port (18), wherein,
The high temperature hot plate coupled reactor (13) is gentle by chuck (12), hot plate (16), dividing plate (20), gas inlet pipe (15)
Body outlet (14) is constituted, and solid slag is fully contacted with the hot plate (16) the latter half to be transferred heat in hot plate (16)
Working media, the evaporation of working media delivers heat to heat the catalyst in the chuck (12) in hot plate, through the revolution
Reacting gas (the CO of bed waste heat recovery unit (103) preheating2/CH4Or CH4/H2O) enter from the gas inlet pipe (15), and
It is passed through in the chuck (12) and concurrent biochemical reaction is contacted with catalyst, produces hydrogen and carbon monoxide from the gas vent
(14) discharge is managed, slag by slag discharge port (18) after the hot plate (16) direct contact heat transfer with being discharged to the second conveyer belt
(27) on, and the revolution bed waste heat recovery unit (103) is entered；
The slag fixed bed (17) is used to collect to be provided with heat-insulation layer (19) outside slag, slag fixed bed.
4. the exhaust heat stepped recycling system of high-temperature slag according to claim 1, it is characterised in that：
The revolution bed waste heat recovery unit (103), including revolution bed (21), gas access (23), gas vent (25), slag
Entrance (24), slag exit (22), wherein,
Reacting gas (CO2/CH4Or CH4/H2O) enter from revolution bed gas entrance (23), from slag fixed bed outlet (18) row
The slag that goes out enters revolution bed slag entrance (24), the preheating reacting gas in revolution bed (21), after reacting gas is preheated from
Turn round the gas access (15) that bed gas outlet (25) enters high temperature hot plate coupled reactor (13), slag after preheating is from returning
Rotated bed slag exit (22) is discharged.
5. the exhaust heat stepped recycling system of high-temperature slag according to claim 3, it is characterised in that：The hot plate (16)
Top half is cased with the hollow chuck (12)；The chuck (12) and the gas inlet pipe (15), gas outlet tube
(14) connection and top is that gas outlet tube (14), lower section are gas inlet pipe (15)；In chuck filled with catalyst (34,
40)；Reacting gas after preheating is fully contacted in chuck with catalyst, is occurred under two conditionings of high temperature and catalyst
Thermal chemical reaction.
6. the exhaust heat stepped recycling system of high-temperature slag according to claim 3, it is characterised in that：The hot plate (16)
By cover plate (29,30), adapter (28) and fin (31) composition, hot plate inside are provided with fin (31), and the adapter (28) is used for will
Hot plate is evacuated and fills working media, and the top half of the cover plate (29,30) outside is cased with the chuck (12), the folder
(12) are covered by the first flat board (32), the second flat board (33), the 3rd flat board (35), fourth panel (37), the 5th flat board (38), the 6th
Flat board (39) and back shroud (36) are enclosed in the periphery composition of cover plate (29,30).
7. the exhaust heat stepped recycling system of high-temperature slag according to claim 6, it is characterised in that：The fin (31)
For straight, sawtooth, porous, shutter pattern, arrangement is horizontally-arranged or tandem.
8. the exhaust heat stepped recycling system of high-temperature slag according to one of claim 1 to 7, it is characterised in that：It is described
Fixed-bed heat transfer-reaction coupling unit is waste heat one-level recovery unit, slag in waste heat one-level recovery unit temperature from 900~
1100C drops to 500C or so；
The revolution bed waste heat recovery unit is waste heat secondary recovery unit, slag in waste heat secondary recovery unit temperature from
500C drops to 50~60C or so.
9. a kind of high temperature hot plate coupled reactor, it is characterised in that：It is entered by chuck (12), hot plate (16), dividing plate (20), gas
Mouth pipe (15) and gas outlet tube (14) composition, hot plate (16) top half are cased with the hollow chuck (12)；It is described
Chuck (12) is connected with the gas inlet pipe (15), gas outlet tube (14) and top is gas outlet tube (14), lower section
It is gas inlet pipe (15)；Catalyst (34,40) is filled with the chuck (12)；Reacting gas after preheating in chuck with
Catalyst is fully contacted, and heat producing chemical reaction is issued in two conditionings of high temperature and catalyst.
10. high temperature hot plate coupled reactor according to claim 8, it is characterised in that：The hot plate (16) is by cover plate
The fin (31) is provided with inside (29,30), adapter (28) and fin (31) composition, hot plate, the adapter (28) is used for heat
Plate is evacuated and fills working media, and the top half of the cover plate (29,30) outside is cased with the chuck (12), the chuck
(12) periphery for being enclosed in cover plate (29,30) by flat board (32,33,35,37,38,39) and back shroud (36) is constituted.
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| CN114875185A (en) * | 2022-06-15 | 2022-08-09 | 西安康桥能源技术有限责任公司 | With CO 2 Blast furnace slag waste heat recovery device and method as heat carrier |
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| CN107022659B (en) | 2018-11-23 |
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