CN106041108B - Dilval dry granulation and methane vapor reforming waste-heat recovery device and method - Google Patents
Dilval dry granulation and methane vapor reforming waste-heat recovery device and method Download PDFInfo
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- CN106041108B CN106041108B CN201610381128.6A CN201610381128A CN106041108B CN 106041108 B CN106041108 B CN 106041108B CN 201610381128 A CN201610381128 A CN 201610381128A CN 106041108 B CN106041108 B CN 106041108B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/10—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying using centrifugal force
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- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
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- C01B3/32—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide, air
- C01B3/34—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide, air by reaction of hydrocarbons with gasifying agents
- C01B3/38—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide, air by reaction of hydrocarbons with gasifying agents using catalysts
- C01B3/40—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide, air by reaction of hydrocarbons with gasifying agents using catalysts characterised by the catalyst
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- 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
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- 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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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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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
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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Abstract
The invention provides a kind of dilval dry granulation and methane vapor reforming waste-heat recovery device and method,The dilval dry granulation and methane vapor reforming waste-heat recovery device structure are relatively simple,Production is implemented and uses operation all relatively simple,And with reference to its dilval dry granulation and methane vapor reforming exhaust heat recovering method,While using dry granulation method preferably to ensure the refinement granulation effect to dilval,The required resource for being converted into methane-steam reforming can also be reclaimed by the multistage of Physical joint chemical method to the waste heat of state dilval,It can help to improve the recovery utilization rate to dilval residual heat resources,So as to effectively solve to melt the granulation difficult processing of dilval in the prior art to meet stainless steel-making process requirement,And its residual heat resources recovery utilization rate it is low the problem of,With good industrial application value,Can smelter popularization and application at home.
Description
Technical field
The present invention relates to metallurgical engineering, environmental protection and energy saving field, the energy-saving and emission-reduction of metallurgical process, metallurgical cinder are related generally to
Dry granulation, more particularly to a kind of dilval dry granulation and methane vapor reforming waste-heat recovery device and method.
Background technology
Need to add ferronickel raw material in stainless steel production, particle when ferronickel enters stove is smaller, can more shorten the smelting of steel-making
Refine the time, but simultaneously in order to ensure that ferronickel particle can pass through surface slag blanket, that is, require that its quality can not be too small, thus ferronickel
The particle of alloy can not be too small, and usual particle diameter is optimal in 10 ~ 40mm.At present, in ferronickel metallurgical technology, the country is whether
Blast Furnace Method, blast furnace process or rotary kiln prereduction-electric furnace smelting process, in subsequent melt ferronickel water process, mostly using biography
Pig machine ingot casting+Mechanical Crushing method of system.Smelting enterprise small to ferronickel yield, ferronickel grade is low, using pig machine ingot casting
Method, manufacturing condition can substantially meet requirement.But for high-grade nickel ferroalloy(Nickel content is more than 25%), due to molten
Point is high, and silicon, carbon content are relatively low, poor fluidity, and mold can be caused to consume, and big, stripping result is poor, the residual iron time length of equipment cleaning, from
And cast iron cycle period is caused to be grown, it is difficult to meet the needs of extensive ferronickel production;Simultaneously as nickel grade is high, ferronickel rigidity
By force, ingot casting burr is difficult to clear up, and product appearance physical quality is poor, and yield rate and the cast iron rate of recovery are all low;The ferronickel finally obtained
Crumb size is all bigger, and its particle diameter is typically in the range of 150 ~ 200 millimeters, it is necessary to which further crushing and processing could preferably
Meet stainless steel-making process requirement, this undoubtedly adds crushing and processing cost and stainless steel smelting cost.
Further, since the tapping temperature of dilval is higher(Usually 1600 ~ 1650 DEG C), using " pig machine ingot casting+
The method of Mechanical Crushing " during obtaining dilval block, is typically directly closed by way of water-spraying control to ferronickel
Ingot mould cools, and so not only needs the substantial amounts of new water resource of consumption, is also easy to produce hydrogen in Cooling Process in dilval
The explosion hazard gases such as gas, while easily it is mingled with impurity in the hot water obtained after water cooling, transmission pipeline fouling and clogging is easily caused, these disadvantages
The steam, the hot water that all limit obtained by it is held to directly apply to heating, the water cooling waste heat for causing to melt dilval is difficult to pass through
The form of heating is recycled.Also there are some waste heat recovery schemes, melting dilval water cooling institute is reclaimed by heat exchanger
The waste heat of steam, hot water is obtained for generating electricity, but the efficiency utilization rate of its cogeneration generally can only reach 20 ~ 25%, waste heat
Resource utilization is low.
Therefore, in face of melt the granulation difficult processing of dilval in the prior art with directly meet stainless steel-making process will
Ask and the problem of its residual heat resources recovery utilization rate is low, melting dilval can either preferably be realized by needing one kind badly in industry
Granulation, and can enough possess the technology of higher residual heat resources recovery utilization rate.
The content of the invention
For above shortcomings in the prior art, it is an object of the invention to provide a kind of dilval dry granulation
And methane vapor reforming waste-heat recovery device, while it is used to realize to the granulation processing of liquid molten dilval, moreover it is possible to
Enough waste heats to state dilval are subject to the required resource that multistage recovery is converted into methane-steam reforming, can help to carry
The high recovery utilization rate to dilval residual heat resources, to solve to melt in the prior art the granulation difficult processing of dilval with
The problem of meeting stainless steel-making process requirement and its low residual heat resources recovery utilization rate.
To achieve the above object, present invention employs following technical scheme:
A kind of dilval dry granulation and methane vapor reforming waste-heat recovery device, including dry granulation device, reformation
Reaction bed, slag particle collector, water circulation evaporative condenser, water circulation heat exchanger and methane separation device;
The top of the dry granulation device is provided with dilval liquid entrance and gas vent, the middle position in dry granulation device
Centrifugal granulation device, the bottom of dry granulation device and the reforming reaction are provided with the position directly below of dilval liquid entrance
The top of bed connects connection;The bottom of reforming reaction bed is provided with funnelform discharging opening, and the bottom of reforming reaction bed is close
The side wall of funnel-form discharging opening opening position is provided with methane vapor air inlet;It is anti-that the slag particle collector face is arranged at reformation
Answer at the unloading position below the discharging opening of bed, the water circulation evaporative condenser is arranged at the bottom of slag particle collector and can
Heat transfer is carried out between slag particle collector, and the steam outlet of water circulation evaporative condenser is communicated to the first of reforming reaction bed
Alkane vapor air inlet;
Gas vent at the top of the dry granulation device is connected by being disposed with the gas channel of air exhauster and deduster
The air-flow heat exchanger channels entrance of water circulation heat exchanger is passed to, water circulation heat is flowed to from dry granulation device by air exhauster certain driving air-flow
The air-flow heat exchanger channels of exchanger;Air-flow heat exchanger channels outlet the entering to methane separation device of the water circulation heat exchanger
Gas port, and the recirculated water heat exchange steam (vapor) outlet of water circulation heat exchanger is communicated to the methane vapor air inlet of reforming reaction bed;
The methane separation device is used to isolate methane from the gas of entrance, and by isolated methane and mixed tail gas respectively from
Its methane gas exports and mixed tail gas outlet discharge, and the methane gas outlet of methane separation device is also communicated to reforming reaction bed
Methane vapor air inlet.
In above-mentioned dilval dry granulation and methane vapor reforming waste-heat recovery device, as improvement project, institute
State rotary drive motor that the centrifugal granulation device in dry granulation device sets straight up by drive shaft and installed in rotation
Porous centrifugation revolving cup in the drive shaft of motor is formed;It is described it is porous centrifugation revolving cup have a horizontally disposed bottom of a cup and
The wall of cup extended straight up along bottom of a cup edge, the ferronickel that is opening up and being right against dry granulation device of porous centrifugation revolving cup close
Golden liquid entrance, the logical of some rows is arranged into from bottom to top circumferentially arranged with from bottom of a cup opening position on the wall of cup of porous centrifugation revolving cup
Hole, the thickness of the wall of cup is 5 ~ 10mm, and the aperture of the through hole is 10 ~ 20mm, is arranged in the two neighboring through hole of same a line
Spacing between edge is 5 ~ 10mm, and the spacing being arranged between the two neighboring through hole edge of adjacent rows is 6 ~ 15mm, and
Through hole per adjacent rows is staggered.
In above-mentioned dilval dry granulation and methane vapor reforming waste-heat recovery device, as improvement project, institute
State water circulation heat exchanger and be additionally operable to collect vapor in its air-flow heat exchanger channels and cool down condensed condensed water and pass through condensation
Water output is discharged, and the recirculated water water leg phase of the condensation water output and water circulation evaporative condenser of water circulation heat exchanger
Connection.
In above-mentioned dilval dry granulation and methane vapor reforming waste-heat recovery device, preferably, institute
It is moving bed or fluid bed to state reforming reaction bed.
In above-mentioned dilval dry granulation and methane vapor reforming waste-heat recovery device, preferably, institute
State methane separation device and use stage variable pressure adsorption tower.
In above-mentioned dilval dry granulation and methane vapor reforming waste-heat recovery device, as improvement project, institute
State and plate feed is provided between the discharging opening of reforming reaction bed and slag particle collector, to carry out the discharging opening of reforming reaction bed
Feeding to slag particle collector.
Accordingly, present invention also offers dilval dry granulation and methane vapor reforming exhaust heat recovering method;For
This, present invention employs following technical scheme:
A kind of dilval dry granulation and methane vapor reforming exhaust heat recovering method, are done using above-mentioned dilval
Method is granulated and methane vapor reforming waste-heat recovery device is implemented as follows:
1)Startup optimization dilval dry granulation and methane vapor reforming waste-heat recovery device, control its dry granulation
Centrifugal granulation device rotary speed is 100 ~ 300rpm in device, and is passed through first into reforming reaction bed by its methane vapor air inlet
Alkane vapor, dilval dry granulation and methane vapor reforming waste-heat recovery device are driven by the air exhauster on gas channel
Interior airflow circulating;
2)The dilval liquid entrance that 1600 ~ 1650 DEG C of liquid molten dilval is injected at the top of dry granulation device,
The centrifugal granulation device flowed into dry granulation device, is thrown out of under the action of the centrifugal force, subsequently breaks up, is granulated into molten drop, and flies
Dilval molten drop in row carries out heat convection in surface tension and with the air-flow that rises in dry granulation device, is frozen into
1000 ~ 1100 DEG C of dilval particle, falls into reforming reaction bed;
3)Dilval particle into reforming reaction bed is continuing to fall and is piling up stop in reforming reaction bed
During, the air-flow with rising in reforming reaction bed carries out heat convection again so that and dilval particle temperature is down to 700 ~
750 DEG C, then the discharging opening from reforming reaction bed bottom be emitted into slag particle collector and collected, and in slag particle collector
Dilval particle carries out heat exchange with water circulation evaporative condenser so that the heated steaming of recirculated water in water circulation evaporative condenser
Send vapor and vapor is delivered to the methane vapor air inlet of reforming reaction bed by steam outlet, hence into
Reforming reaction is participated in reforming reaction bed and dry granulation device;
4)In step 2)~3)During, under the swabbing action of the air exhauster on gas channel, enter from methane vapor
The methane vapor that gas port enters reforming reaction bed is flowed upwardly into dry granulation device, and in reforming reaction bed and dry granulation device
It is interior directly to be contacted with dilval particle, reforming reaction generation one occurs in the presence of heated and dilval is as catalyst
Carbonoxide and hydrogen, the mixed gas that then carbon monoxide, hydrogen and the complete methane vapor of unreacted are formed is from dry method grain
Change the gas vent inflow stream passage at the top of device, the air-flow heat exchanger channels of water circulation heat exchanger are entered after removing dust device dedusting
Inside exchanged heat, the vapor in mixed gas is condensed separation in the air-flow heat exchanger channels of water circulation heat exchanger, simultaneously
So that the heated vapor and by the recirculated water steam (vapor) outlet that exchanges heat that vapor is defeated of evaporating of the recirculated water of water circulation heat exchanger
The methane vapor air inlet of reforming reaction bed is delivered to, it is anti-hence into reformation is participated in reforming reaction bed and dry granulation device
Should;The mixed gas for removing vapor flows into methane separation by the air-flow heat exchanger channels outlet of water circulation heat exchanger again
Device so that remove to export from methane gas after the methane in the mixed gas of vapor is separated in methane separation device and discharge,
Then come back to by the methane vapor air inlet of reforming reaction bed in reforming reaction bed and dry granulation device and participate in reforming
Reaction, and remove the carbon monoxide in the mixed gas of vapor, hydrogen in methane separation device with after methane separation from mixing
Offgas outlet is discharged.
Compared to prior art, the present invention has the advantages that:
1st, dilval dry granulation of the invention and methane vapor reforming waste-heat recovery device and method, are employed dry
Method shotting preferably to ensure the refinement granulation effect to dilval, and additionally uses on this basis to more than dilval
The Physical of thermal resource reclaims with the united three-level of chemical method so that the residual heat resources of dilval are used to steam as methane water
Gas reforming reaction heat energy supply and chemical energy supply, and dilval reforming reaction is delivered heat to as physics after obtained by gaseous mixture
The waste heat of itself after heat energy and the dilval heat transfer of body, then it is used for conversion by two different phases and produces vapor simultaneously
Return and participate in reforming reaction, so as to which the supply that new vapor is passed through into reforming reaction bed be greatly decreased, reached reduction first
The purpose of the production cost of vapor resource needed for alkane steam reforming reaction, is effectively increased to dilval residual heat resources
Organic efficiency and utilization rate.
2nd, in dilval dry granulation of the present invention and methane vapor reforming waste-heat recovery device and method, it is not necessary to
Catalyst is additionally added for methane-steam reforming, and directly by dilval itself as promotion methane vapor
The catalyst of reforming reaction, it is that form is utilized to the another kind of dilval resource.
3rd, using the dilval dry granulation and methane vapor reforming waste-heat recovery device and method of the present invention, from nickel
Discharged mixed the outlet of the methane separation device mixed tail gas of ferroalloy dry granulation and methane vapor reforming waste-heat recovery device
Close the mixed gas that the main component in tail gas is carbon monoxide, hydrogen(That is water-gas), wherein not containing industrial refuse not only
Gas, avoid extra industrial refuse processing cost, and water-gas or a kind of more conventional industrial fuel and hydrogen manufacturing
Raw material, right and wrong further embody the present invention program for more than dilval often with the industrial products for having industrial application value
The Optimum utilization of thermal resource.
4th, dilval dry granulation of the invention and methane vapor reforming waste-heat recovery device and method, not only may be used
For realizing the reformation of methane vapor, the alkanes such as propane light hydrocarbon and vapor are also implemented for
Reform.
5th, in dilval dry granulation and methane vapor reforming waste-heat recovery device of the invention, additionally it is possible to by right
The structure of centrifugal granulation device is improved in its dry granulation device, and porous centrifugation revolving cup is granulated dilval, substantially increase from
Utilization efficiency of the heart granulating device to rotational energy, and then it is favorably improved granulated processed efficiency.
6th, dilval dry granulation and methane vapor reforming waste-heat recovery device structure of the invention are relatively simple, raw
Production is implemented and uses operation all relatively simple, and combines its dilval dry granulation and methane vapor reforming waste heat recovery
Method, while realizing to the granulation processing of liquid molten dilval, additionally it is possible to pass through physics to the waste heat of state dilval
The multistage recovery of method joint chemical method is converted into the required resource of methane-steam reforming, can help to improve and ferronickel is closed
The recovery utilization rate of golden residual heat resources, so as to effectively solve to melt the granulation difficult processing of dilval in the prior art to meet not
The problem of steel smelting technological requirement of becoming rusty and its low residual heat resources recovery utilization rate, there is good industrial application value, Ke Yi
Domestic smelter popularization and application.
Brief description of the drawings
Fig. 1 is preferable to carry out for one kind of dilval dry granulation of the present invention and methane vapor reforming waste-heat recovery device
Structural representation.
Fig. 2 is centrifugal granulation device in dilval dry granulation of the present invention and methane vapor reforming waste-heat recovery device
The cross section structure diagram of the porous centrifugation revolving cup specific implementation structure of prioritization scheme.
Fig. 3 is the cooling slag particle figure of gained in the embodiment of the present invention three.
Embodiment
Be directed in the prior art melt dilval granulation difficult processing with meet stainless steel-making process requirement and its
The problem of residual heat resources recovery utilization rate is low is solved, it is necessary to start with terms of granulating technique, waste heat recovery two simultaneously.With
The molten alloy granulating method of " pig machine ingot casting+Mechanical Crushing " is compared, and dry granulation method is by molten alloy by centrifugal force
Throw away so that the molten alloy droplets thrown away are particle with cooling and solidifying after convection gas heat exchange, granulation are realized, according to molten alloy
Surface tension and viscous force, by the rotating speed of centrifugal granulation device in appropriate control dry granulation device, then it is readily obtained 50mm
The granulated product of following particle diameter, for the granulation processing for melting dilval, such granulation granularity condition can be compared with
The good requirement for meeting stainless steel-making process.But the waste heat during how lifting melting dilval dry granulation returns
Rate of producing effects is a new technical barrier again, because if only by profit after convection gas and dilval progress physics heat exchange
The waste heat absorbed with gas carries out generation mode, still exist cogeneration efficiency is limited, residual heat resources recovery utilization rate compared with
The problem of low, thus must take into consideration residual heat resources are taken physical recovering method joint chemical recovering method mode, could improve more than
Thermal resource recovery utilization rate, meanwhile, the united waste heat chemical recovering method scheme of institute also needs to avoid to dilval grain products
Pollution, also, as the technical requirements in higher level face, the product obtained by waste heat chemical recovering method scheme itself, preferably not
Containing industrial refuse, with avoid because increase the processing cost of gained industrial refuse is caused waste heat recovery scheme integral into
This increase, or even waste heat chemical recovering method scheme itself products therefrom are preferably able to as the industry production with industrial application value
Product, it can so make it that the value that dilval residual heat resources reclaim is maximized as far as possible.
Based on above-mentioned technical thought, in order to preferably solve to melt in the prior art the granulation difficult processing of dilval with
The problem of meeting stainless steel-making process requirement and its low residual heat resources recovery utilization rate, the invention provides a kind of conjunction of ferronickel
Golden dry granulation and methane vapor reforming waste-heat recovery device, and carry out dilval dry granulation and first using the device
The method of alkane steam reforming waste heat recovery processing, while realizing to the granulation processing of liquid molten dilval, additionally it is possible to
It is subject to the required resource that multistage recovery is converted into methane-steam reforming to the waste heat of state dilval, realizes to waste heat
The Physical of resource and the combined recovery of chemical method, so as to help to improve the recovery utilization rate to dilval residual heat resources, and
And waste heat chemical recovering method scheme products therefrom is water-gas(Main component is carbon monoxide and hydrogen), it is with commercial Application
The industrial products of value and be free of industrial refuse product.
Technical scheme is described in detail below.
As shown in figure 1, the present invention dilval dry granulation and methane vapor reforming waste-heat recovery device mainly by
Dry granulation device 10, reforming reaction bed 20, slag particle collector 30, water circulation evaporative condenser 40, the and of water circulation heat exchanger 50
The part of methane separation device more than 60 is formed.Wherein, the top of dry granulation device 10 is provided with dilval liquid entrance 11 and gas vent
12, the middle part in dry granulation device 10, which is located at the position directly below of dilval liquid entrance, is provided with centrifugal granulation device 70, does
The bottom of method pelletizer 10 connects with the top of the reforming reaction bed 20 and is connected;The bottom of reforming reaction bed 20 is provided with funnel
The discharging opening 21 of shape, and the bottom of reforming reaction bed 20 is provided with methane vapor close to the side wall of funnel-form discharging opening opening position
Air inlet 22, herein, methane vapor air inlet can be provided only with one, can also be provided with multiple, and each methane
Vapor air inlet is used to be passed through methane vapor, methane gas or vapor;Then face is arranged at weight to slag particle collector 30
At the unloading position of the lower section of discharging opening 21 of whole reaction bed, and water circulation evaporative condenser 40 is arranged at the bottom of slag particle collector 30
Portion simultaneously can carry out heat transfer between slag particle collector, and the steam outlet 41 of water circulation evaporative condenser 40 is communicated to weight
The methane vapor air inlet 22 of whole reaction bed 20.The gas vent 12 at the top of dry granulation device 10 is by being disposed with exhausting
The gas channel of machine 13 and deduster 14 is communicated to the air-flow heat exchanger channels entrance of water circulation heat exchanger 50, is driven by air exhauster 13
Stream of taking offence flows to the air-flow heat exchanger channels of water circulation heat exchanger 50 from dry granulation device 10;The air-flow of water circulation heat exchanger 50
Heat exchanger channels outlet to methane separation device 60 air inlet, and water circulation heat exchanger 50 recirculated water heat exchange steam (vapor) outlet
51 are communicated to the methane vapor air inlet 22 of reforming reaction bed 20;Methane separation device 60 is then used to separate from the gas of entrance
Go out methane, and isolated methane and mixed tail gas are exported into 62 rows from its methane gas outlet 61 and mixed tail gas respectively
Go out, and the methane gas outlet 61 of methane separation device is also communicated to the methane vapor air inlet 22 of reforming reaction bed.
For specific implementation, in the dilval dry granulation of the present invention and methane vapor reforming waste heat recovery dress
In putting, according to the surface tension and viscous force of melting dilval, filled by centrifugal granulation in appropriate control dry granulation device
The rotating speed put, it is easier to obtain the dilval granulated product of below 50mm particle diameters, can preferably meets stainless steel smelting work
The requirement of skill.But in order to preferably ensure the granulation effect to dilval, centrifugal granulation device in dry granulation device can be with
Using the structure design of optimization, rotation driving that the centrifugal granulation device of the optimizing structure design is set straight up by drive shaft
Motor and the porous centrifugation revolving cup in the drive shaft of rotary drive motor are formed;As shown in Fig. 2 the porous centrifugation
Revolving cup 71 has a horizontally disposed bottom of a cup 71a and wall of cup 71b extended straight up along bottom of a cup edge, porous centrifugation revolving cup
71 dilval liquid entrance that is opening up and being right against dry granulation device, it is porous centrifugation revolving cup wall of cup 71b on circumferentially
Provided with the through hole 71c for being arranged into some rows from bottom to top from bottom of a cup opening position, the thickness of the wall of cup is 5 ~ 10mm, the through hole
Aperture be 10 ~ 20mm, the spacing being arranged between the two neighboring through hole edge of same a line is 5 ~ 10mm, is arranged in adjacent two
Spacing between capable two neighboring through hole edge is 6 ~ 15mm, and the through hole per adjacent rows is staggered.The optimization structure
Centrifugal granulation device employ the porous centrifugation revolving cup of Unique physical design, the wall of cup of porous centrifugation revolving cup erects along bottom of a cup edge
Directly upwardly extend, and circumferentially arranged with the through hole for being arranged into some rows from bottom to top from bottom of a cup opening position on wall of cup, so as to from
During the heart is granulated, the liquid molten dilval into porous centrifugation revolving cup is difficult to throw away from the top edge of wall of cup, but
It is forced to squeeze from the through hole on wall of cup under rotary centrifugal force effect and gushes, forms the diameter slag liquid suitable with through-hole aperture
Line, and subsequently break up, be granulated into molten drop, so as to which the generation of block slag and slag wool be greatly reduced;On the wall of cup of porous centrifugation revolving cup
The aperture of through hole is 10 ~ 20mm, and the dilval molten drop size being thrown out of is limited by through-hole aperture, hence in so that ferronickel closes
The cooling granulation particle diameter obtained after golden molten drop cooling is also mainly distributed on 10 ~ 20mm section, without carrying out pulverization process again
Just it can be directly used for stainless steel smelting production;Also, due to it is porous centrifugation revolving cup wall of cup on through hole from bottom of a cup opening position from
It is lower and on be provided with multilayer, during centrifugal granulation, no matter in porous centrifugation revolving cup melting dilval accumulation it is less
Or when more, melting dilval through hole of different height from wall of cup can be caused to gush out and be granulated well, from
And make it that porous centrifugation revolving cup can be good at adapting to the change of different liquid molten dilval feed rates, reduce equipment
Limitation to melting dilval feed rate, while also enable and rotate the porous rotational energy for centrifuging revolving cup in granulation
It is fully utilized, centrifugal granulation device can be run with higher rotating speed, to improve granulated processed efficiency;It is in addition, more
Hole centrifugation revolving cup wall of cup thickness be 5 ~ 10mm because wall of cup thickness should not it is excessive, otherwise on wall of cup through hole axial length mistake
Length easily causes slag to adhere in through-holes, and then easily through hole is blocked, and causes through hole utilization rate to decline;And porous centrifugation turns
Between through hole on cup wall of cup, the spacing being arranged between the two neighboring through hole edge of same a line is 5 ~ 10mm, is arranged in phase
Spacing between the two neighboring through hole edge of adjacent two rows is 6 ~ 15mm, and the through hole per adjacent rows is staggered, and is so
Ensure through hole on porous centrifugation revolving cup distribution situation will not it is excessively intensive and cause the slag liquidus gushed out from different through holes or
Molten drop mutual conglomeration again because of hypotelorism, influence be granulated effect, also ensure through hole distribution situation will not it is excessively sparse and
The less slag for causing accumulation in revolving cup of number of openings on porous centrifugation revolving cup wall of cup is caused not discharge quickly.As can be seen here,
The centrifugal granulation apparatus structure of porous centrifugation revolving cup with the optimization design can preferably ensure the granulation to dilval
Effect, and dilval is granulated by porous centrifugation revolving cup, profit of the centrifugal granulation device to rotational energy can be greatly improved
With efficiency, and then it is favorably improved granulated processed efficiency.
In addition, the specific implementation of the dilval dry granulation and methane vapor reforming waste-heat recovery device in the present invention
In, moving bed or fluid bed can be used to carry out the reforming reaction bed of methane-steam reforming, is avoided because completely
Redesign reforming reaction bed and increase device manufacturing cost.And methane separation device is mainly used for the one of reforming reaction generation
Methane in the mixed gas that carbonoxide, hydrogen and the complete methane vapor of unreacted are formed is separated with other gases, can
To be achieved using stage variable pressure adsorption tower, its specific methane separation implementation belongs to prior art, is not the present invention
Innovation point, no longer add to describe herein.
Dilval is implemented using the dilval dry granulation and methane vapor reforming waste-heat recovery device of the present invention
Dry granulation and the method for methane vapor reforming waste heat recovery, specific implementation step are as follows:
1)Startup optimization dilval dry granulation and methane vapor reforming waste-heat recovery device, control its dry granulation
Centrifugal granulation device rotary speed is 100 ~ 300rpm in device, and is passed through first into reforming reaction bed by its methane vapor air inlet
Alkane vapor, dilval dry granulation and methane vapor reforming waste-heat recovery device are driven by the air exhauster on gas channel
Interior airflow circulating;
2)The dilval liquid entrance that 1600 ~ 1650 DEG C of liquid molten dilval is injected at the top of dry granulation device,
The centrifugal granulation device flowed into dry granulation device, is thrown out of under the action of the centrifugal force, subsequently breaks up, is granulated into molten drop, and flies
Dilval molten drop in row carries out heat convection in surface tension and with the air-flow that rises in dry granulation device, is frozen into
1000 ~ 1100 DEG C of dilval particle, falls into reforming reaction bed;
3)Dilval particle into reforming reaction bed is continuing to fall and is piling up stop in reforming reaction bed
During, the air-flow with rising in reforming reaction bed carries out heat convection again so that and dilval particle temperature is down to 700 ~
750 DEG C, then the discharging opening from reforming reaction bed bottom be emitted into slag particle collector and collected, and in slag particle collector
Dilval particle carries out heat exchange with water circulation evaporative condenser so that the heated steaming of recirculated water in water circulation evaporative condenser
Send vapor and vapor is delivered to the methane vapor air inlet of reforming reaction bed by steam outlet, hence into
Reforming reaction is participated in reforming reaction bed and dry granulation device;
4)In step 2)~3)During, under the swabbing action of the air exhauster on gas channel, enter from methane vapor
The methane vapor that gas port enters reforming reaction bed is flowed upwardly into dry granulation device, and in reforming reaction bed and dry granulation device
It is interior directly to be contacted with dilval, the oxidation of reforming reaction generation one occurs in the presence of heated and dilval is as catalyst
Carbon and hydrogen, the mixed gas that then carbon monoxide, hydrogen and the complete methane vapor of unreacted are formed is from dry granulation device
The gas vent inflow stream passage at top, enter in the air-flow heat exchanger channels of water circulation heat exchanger to enter after removing dust device dedusting
Row heat exchange, the vapor in mixed gas are condensed separation in the air-flow heat exchanger channels of water circulation heat exchanger, simultaneously so that
The recirculated water of water circulation heat exchanger is heated to be evaporated vapor and is delivered to vapor by recirculated water heat exchange steam (vapor) outlet
The methane vapor air inlet of reforming reaction bed, hence into participating in reforming reaction in reforming reaction bed and dry granulation device;Go
Except the mixed gas of vapor flows into methane separation device by the air-flow heat exchanger channels outlet of water circulation heat exchanger again so that
Remove to export from methane gas after the methane in the mixed gas of vapor is separated in methane separation device and discharge, then pass through
The methane vapor air inlet of reforming reaction bed, which comes back to, participates in reforming reaction in reforming reaction bed and dry granulation device, and goes
Except the carbon monoxide in the mixed gas of vapor, hydrogen are arranged in methane separation device with being exported after methane separation from mixed tail gas
Go out.
Pass through the present invention above-mentioned dilval dry granulation and methane vapor reforming waste-heat recovery device and its ferronickel
Alloy dry granulation and methane vapor reforming exhaust heat recovering method can see, and come present invention employs dry granulation method more preferable
Refinement granulation effect of the guarantee to dilval, and control in dry granulation device centrifugal granulation device rotary speed for 100 ~
300rpm, reason are, are analyzed according to the surface tension of liquid molten dilval and viscous force, in 100 ~ 300rpm rotating speed
Under the conditions of can preferably control dilval granulation particle diameter to be mainly distributed on below 50mm, also, if with reference to above-mentioned optimization
The centrifugal granulation device of structure, it is ensured that dilval granular mass percentage of the granularity between 10 ~ 20mm accounts for 80 ~
90% so that gained dilval grain graininess can better meet the requirement of stainless steel-making process.Meanwhile to ferronickel
Under conditions of alloy carries out dry granulation, Physical and the united three-level of chemical method also have been carried out to the residual heat resources of dilval
Recovery.Wherein, first order waste heat recovery is carried out in reforming reaction bed and dry granulation device, is entered from methane vapor air inlet
The methane vapor entered directly contacts in reforming reaction bed and dry granulation device with dilval, by physics conduct heat and by
Heat, reach the temperature conditionss needed for methane-steam reforming(More than 750 DEG C), and dilval becomes the steaming of methane water
The catalyst of reforming reaction occurs under gas high temperature so that with vapor highly endothermic reforming reaction generation carbon monoxide occurs for methane
And hydrogen:CH4+ H2O → CO+3H2,ΔH=205.7kJ/mol;In the process, the waste heat of dilval is used to as first
The chemical heat energy of alkane steam reforming reaction, while also pass through the mixed gas of gained after the reaction of physics heat transfer(Mainly
Composition is carbon monoxide, hydrogen and the complete methane vapor of unreacted)Substantial amounts of gas sensible heat is obtained, the process also causes
1600 ~ 1650 DEG C of liquid molten dilval of dry granulation device is injected by the ferronickel conjunction for being granulated into 1000 ~ 1100 DEG C that cools
Further by absorbing and cooling temperature to 700 ~ 750 DEG C after gold grain, slag is then emitted into by the discharging opening of reforming reaction bed bottom
Grain collector.And second level waste heat recovery is used as, under the swabbing action of the air exhauster on gas channel, in whole dilval
In dry granulation and methane vapor reforming waste-heat recovery device, it can be formed from reforming reaction bed to dry granulation device, again to water
Recycle heat exchanger, the circulating current for arriving methane separation device again, being returned to reforming reaction bed, so as to promoting in reforming reaction bed and
There is the mixed gas of a large amount of sensible heats in dry granulation device after reforming reaction(Main component be carbon monoxide, hydrogen and
The complete methane vapor of unreacted)Exchanged heat by the air-flow for entering water circulation heat exchanger after the deduster dedusting on gas channel
In passage, exchanged heat with the recirculated water in the recirculated water heat exchanger channels of water circulation heat exchanger, during being somebody's turn to do, in mixed gas
Vapor be condensed in the air-flow heat exchanger channels of water circulation heat exchanger separation, while cause following for water circulation heat exchanger
The heated methane water for evaporating vapor and vapor being delivered to reforming reaction bed by recirculated water heat exchange steam (vapor) outlet of ring water
Steam air inlet, as the vapor resource for entering participation reforming reaction in reforming reaction bed and dry granulation device, and due to
The temperature of mixed gas is high, contained sensible heat amount is big, therefore can pass through the heat exchange of water circulation heat exchanger and produce substantial amounts of vapor
It is supplied in reforming reaction.Third level waste heat recovery is carried out between slag particle collector and water circulation evaporative condenser, due to slag
Dilval particle temperature collected by grain collector still reaches 700 ~ 750 DEG C, therefore is entered by water circulation evaporative condenser
The waste heat of dilval particle in one step recovery slag particle collector, and vapor caused by the heat absorption of water circulation evaporative condenser passes through
Its steam outlet will be delivered to the methane vapor air inlet of reforming reaction bed, also serve as entering reforming reaction bed and dry method grain
Change the vapor resource that reforming reaction is participated in device.It can thus be seen that be combined by above-mentioned Physical and chemical method three
Level waste heat recovery, the residual heat resources of dilval are used to heat energy supply and chemical energy confession as methane-steam reforming
Should, and catalyst need not be additionally added, dilval itself then becomes the catalysis for promoting methane-steam reforming
Agent;And dilval reforming reaction is delivered heat to as physics after obtained by mixed gas heat energy and dilval heat transfer after itself
Waste heat, then be used to conversion by two different phases and produce vapor and return to participation reforming reaction, so as to be greatly decreased
The supply of new vapor is passed through into reforming reaction bed, has reached vapor resource needed for reduction methane-steam reforming
Production cost purpose, effectively increase the organic efficiency and utilization rate to dilval residual heat resources.Moreover, pass through
After above-mentioned processing, from dilval dry granulation and the methane separation device mixed tail gas of methane vapor reforming waste-heat recovery device
Main component in the discharged mixed tail gas in outlet is the mixed gas of carbon monoxide, hydrogen(That is water-gas), wherein not only
Industrial refuse gas is not contained, avoids extra industrial refuse processing cost, and water-gas or a kind of more conventional
Industrial fuel and hydrogen feedstock, right and wrong further embody the present invention program often with the industrial products for having industrial application value
For the Optimum utilization of dilval residual heat resources.In addition, the dilval dry granulation and methane vapor reforming of the present invention
Waste-heat recovery device and method, it not only can be only used for realizing the reformation of methane vapor, be also implemented for the alkane such as propane
The reformation of hydro carbons light hydrocarbon and vapor, and there is similar technical principle and effect.
Technical principle based on dilval dry granulation of the present invention and methane vapor reforming waste-heat recovery device, as
Further improvement project, as shown in figure 1, the water circulation heat exchanger 50 in device is additionally operable to collect in its air-flow heat exchanger channels
Vapor cools down condensed condensed water and discharged by condensing water output 52, and the condensed water output of water circulation heat exchanger
Mouth 52 is connected with the recirculated water water leg 42 of water circulation evaporative condenser 40;Since so, the air-flow of water circulation heat exchanger
The condensed water that mixed gas in heat exchanger channels is condensed by heat exchange, which can be then collected, is delivered to water circulation evaporative condenser
Recirculated water water leg so that these condensed waters be used in water circulation evaporative condenser with slag particle collector heat exchange be evaporated to
Vapor, and then be delivered back into again in reforming reaction bed and dry granulation device and participate in reforming reaction, realize to condensed water and
Its cold resource recycles.And it is used as dilval dry granulation of the present invention and methane vapor reforming waste-heat recovery device
The improvement project of another aspect, as shown in figure 1, in device between the discharging opening 21 and slag particle collector 30 of reforming reaction bed 20 also
Plate feed 80 can be had additional, is handled to carry out the discharging opening of reforming reaction bed to the feeding and distributing material of slag particle collector;
Since so, plate feed can be passed through so that fall into the slag particle of slag particle collector in slag from the discharging opening of reforming reaction bed
Laid more uniformly in grain collector, avoid collection of the slag particle in slag particle collector in reforming reaction bed discharging opening lower position
In pile up and cause radiating uneven, so as to the heat between the slag particle and water circulation evaporative condenser that are more beneficial in slag particle collector
Conduction, can preferably ensure heat exchange efficiency of the dilval particle with water circulation evaporative condenser in slag particle collector.On
Improvement project of both stating, improved by the structure of not ipsilateral so that dilval dry granulation of the invention and methane
Steam reforming waste-heat recovery device can possess more preferable heat recovery efficiency.
In addition it should be noted that methane-steam reforming involved in technical solution of the present invention, has been
The more ripe technology of one application, thus be passed through needed for its reaction methane, the usage ratio of vapor, be art technology
What personnel can be grasped according to its technological know-how, further related to dilval UTILIZATION OF VESIDUAL HEAT IN in addition in technical solution of the present invention
In producing vapor resource provisioning in reforming reaction, therefore in practical operation, those skilled in the art can close according to ferronickel
The supply of golden waste heat output vapor, suitably adjustment are additionally passed through methane, vapor is supplied in the usage ratio of reforming reaction,
To meet actual processing operational requirements.
Technical scheme and its effect are further described in conjunction with embodiment below.It should be appreciated that
It is that these embodiments are only used for further illustrating embodiment of the present invention, rather than for limiting the present invention.
Embodiment one:
Using dilval dry granulation of the present invention and methane vapor reforming waste-heat recovery device to melting dilval
Granulation and waste heat recovery operation are carried out, and using the centrifugal granulation device of optimization structure proposed by the present invention in dry granulation device.
Startup optimization dilval dry granulation and methane vapor reforming waste-heat recovery device, and pass through its methane vapor air inlet
Methane vapor is passed through into reforming reaction bed, dilval dry granulation and methane water are driven by the air exhauster on gas channel
Airflow circulating in steam reforming waste-heat recovery device;Then 1600 DEG C or so of liquid dilval is injected into dry granulation device
The dilval liquid entrance at top, the centrifugal granulation device flowed into dry granulation device, centrifugal granulation device used use this hair
The optimization structure of bright proposition, a diameter of 55 mm of its porous centrifugation revolving cup, is highly 135 mm, wall of cup thickness is 5mm, wall of cup
The aperture of upper through hole is 10mm, and the spacing being arranged between the two neighboring through hole edge of same a line is 5mm, is arranged in adjacent two
Spacing between capable two neighboring through hole edge is 6mm, and it is 100,200 and to control centrifugal granulation device rotary speed respectively
300rpm, flow into centrifugal granulation device liquid dilval be thrown out of under the action of the centrifugal force, subsequently break up, be granulated into it is molten
Drop, and dilval molten drop in-flight carries out heat convection in surface tension and with the air-flow that rises in dry granulation device,
1000 DEG C or so of dilval particle is frozen into, falls into reforming reaction bed and piles up after a period of time from reforming reaction bed bottom
Funnelform discharging opening is emitted into slag particle collector and collected, and rises during being somebody's turn to do in dilval particle reforming reaction bed
Air-flow carries out heat convection again so that dilval particle temperature is down to 700 DEG C or so, therefore the nickel in slag particle collector
Ferroalloy particles carry out heat exchange with water circulation evaporative condenser again, and its remaining sensible heat is converted into the water needed for reforming reaction and steamed
Gas;And during above-mentioned, under the swabbing action of the air exhauster on gas channel, enter weight from methane vapor air inlet
The methane vapor of whole reaction bed is flowed upwardly into dry granulation device, and is closed in reforming reaction bed and dry granulation device with ferronickel
Gold grain directly contacts, and reforming reaction generation carbon monoxide and hydrogen occur in the presence of heated and dilval is as catalyst
Gas, the mixed gas that then carbon monoxide, hydrogen and the complete methane vapor of unreacted are formed is at the top of dry granulation device
Gas vent inflow stream passage, enter after removing dust device dedusting in the air-flow heat exchanger channels of water circulation heat exchanger and changed
Heat, the vapor in mixed gas are condensed separation in the air-flow heat exchanger channels of water circulation heat exchanger, while water is followed
The recirculated water of ring heat exchanger is heated to evaporate vapor, so as to which the sensible heat of mixed gas to be converted into the water needed for reforming reaction
Steam, and remove the mixed gas of vapor(Main component is CH4, CO and H2)Changed again by the air-flow of water circulation heat exchanger
The passage of heat outlet flow into methane separation device so that methane therein be separated after from methane gas export discharge, then with profit
Another same flow back in reforming reaction bed and dry granulation device of vapor generated with waste heat is continued to cool down dilval particle and joined
With reforming reaction, and remove the carbon monoxide in the mixed gas of vapor, hydrogen in methane separation device with after methane separation
Export and discharge from mixed tail gas, and then the mixed gas to carbon monoxide, hydrogen can be exported by mixed tail gas(Water-gas)
Collected and utilized, such as to as fuel energy or hydrogen feedstock etc..Granulated processed of the present embodiment to dilval
As a result it is as shown in table 1:
The gained dilval grain graininess of 1 embodiment of table one forms(wt%)
Embodiment two:
Using dilval dry granulation of the present invention and methane vapor reforming waste-heat recovery device to melting dilval
Granulation and waste heat recovery operation are carried out, and using the centrifugal granulation device of optimization structure proposed by the present invention in dry granulation device.
Startup optimization dilval dry granulation and methane vapor reforming waste-heat recovery device, and pass through its methane vapor air inlet
Methane vapor is passed through into reforming reaction bed, dilval dry granulation and methane water are driven by the air exhauster on gas channel
Airflow circulating in steam reforming waste-heat recovery device;Then 1630 DEG C or so of liquid dilval is injected into dry granulation device
The dilval liquid entrance at top, the centrifugal granulation device flowed into dry granulation device, centrifugal granulation device used use this hair
The optimization structure of bright proposition, a diameter of 55 mm of its porous centrifugation revolving cup, is highly 135 mm, wall of cup thickness is 8mm, wall of cup
The aperture of upper through hole is 15mm, and the spacing being arranged between the two neighboring through hole edge of same a line is 8mm, is arranged in adjacent two
Spacing between capable two neighboring through hole edge is 10mm, and it is 100,200 and to control centrifugal granulation device rotary speed respectively
300rpm, flow into centrifugal granulation device liquid dilval be thrown out of under the action of the centrifugal force, subsequently break up, be granulated into it is molten
Drop, and dilval molten drop in-flight carries out heat convection in surface tension and with the air-flow that rises in dry granulation device,
1050 DEG C or so of dilval particle is frozen into, falls into reforming reaction bed and piles up after a period of time from reforming reaction bed bottom
Funnelform discharging opening is emitted into slag particle collector and collected, and rises during being somebody's turn to do in dilval particle reforming reaction bed
Air-flow carries out heat convection again so that dilval particle temperature is down to 730 DEG C or so, therefore the nickel in slag particle collector
Ferroalloy particles carry out heat exchange with water circulation evaporative condenser again, and its remaining sensible heat is converted into the water needed for reforming reaction and steamed
Gas;And during above-mentioned, under the swabbing action of the air exhauster on gas channel, enter weight from methane vapor air inlet
The methane vapor of whole reaction bed is flowed upwardly into dry granulation device, and is closed in reforming reaction bed and dry granulation device with ferronickel
Gold grain directly contacts, and reforming reaction generation carbon monoxide and hydrogen occur in the presence of heated and dilval is as catalyst
Gas, the mixed gas that then carbon monoxide, hydrogen and the complete methane vapor of unreacted are formed is at the top of dry granulation device
Gas vent inflow stream passage, enter after removing dust device dedusting in the air-flow heat exchanger channels of water circulation heat exchanger and changed
Heat, the vapor in mixed gas are condensed separation in the air-flow heat exchanger channels of water circulation heat exchanger, while water is followed
The recirculated water of ring heat exchanger is heated to evaporate vapor, so as to which the sensible heat of mixed gas to be converted into the water needed for reforming reaction
Steam, and remove the mixed gas of vapor(Main component is CH4, CO and H2)Changed again by the air-flow of water circulation heat exchanger
The passage of heat outlet flow into methane separation device so that methane therein be separated after from methane gas export discharge, then with profit
Another same flow back in reforming reaction bed and dry granulation device of vapor generated with waste heat is continued to cool down dilval particle and joined
With reforming reaction, and remove the carbon monoxide in the mixed gas of vapor, hydrogen in methane separation device with after methane separation
Export and discharge from mixed tail gas, and then the mixed gas to carbon monoxide, hydrogen can be exported by mixed tail gas(Water-gas)
Collected and utilized, such as to as fuel energy or hydrogen feedstock etc..Granulated processed of the present embodiment to dilval
As a result it is as shown in table 2:
The gained dilval grain graininess of 2 embodiment of table two forms(wt%)
Embodiment three:
Using dilval dry granulation of the present invention and methane vapor reforming waste-heat recovery device to melting dilval
Granulation and waste heat recovery operation are carried out, and using the centrifugal granulation device of optimization structure proposed by the present invention in dry granulation device.
Startup optimization dilval dry granulation and methane vapor reforming waste-heat recovery device, and pass through its methane vapor air inlet
Methane vapor is passed through into reforming reaction bed, dilval dry granulation and methane water are driven by the air exhauster on gas channel
Airflow circulating in steam reforming waste-heat recovery device;Then 1650 DEG C or so of liquid dilval is injected into dry granulation device
The dilval liquid entrance at top, the centrifugal granulation device flowed into dry granulation device, centrifugal granulation device used use this hair
The optimization structure of bright proposition, a diameter of 55 mm of its porous centrifugation revolving cup, is highly 135 mm, wall of cup thickness is 10mm, wall of cup
The aperture of upper through hole is 20mm, and the spacing being arranged between the two neighboring through hole edge of same a line is 10mm, is arranged in adjacent
Spacing between the two neighboring through hole edge of two rows is 15mm, and it is 100,200 and to control centrifugal granulation device rotary speed respectively
300rpm, flow into centrifugal granulation device liquid dilval be thrown out of under the action of the centrifugal force, subsequently break up, be granulated into it is molten
Drop, and dilval molten drop in-flight carries out heat convection in surface tension and with the air-flow that rises in dry granulation device,
1100 DEG C or so of dilval particle is frozen into, falls into reforming reaction bed and piles up after a period of time from reforming reaction bed bottom
Funnelform discharging opening is emitted into slag particle collector and collected, and rises during being somebody's turn to do in dilval particle reforming reaction bed
Air-flow carries out heat convection again so that dilval particle temperature is down to 750 DEG C or so, therefore the nickel in slag particle collector
Ferroalloy particles carry out heat exchange with water circulation evaporative condenser again, and its remaining sensible heat is converted into the water needed for reforming reaction and steamed
Gas;And during above-mentioned, under the swabbing action of the air exhauster on gas channel, enter weight from methane vapor air inlet
The methane vapor of whole reaction bed is flowed upwardly into dry granulation device, and is closed in reforming reaction bed and dry granulation device with ferronickel
Gold grain directly contacts, and reforming reaction generation carbon monoxide and hydrogen occur in the presence of heated and dilval is as catalyst
Gas, the mixed gas that then carbon monoxide, hydrogen and the complete methane vapor of unreacted are formed is at the top of dry granulation device
Gas vent inflow stream passage, enter after removing dust device dedusting in the air-flow heat exchanger channels of water circulation heat exchanger and changed
Heat, the vapor in mixed gas are condensed separation in the air-flow heat exchanger channels of water circulation heat exchanger, while water is followed
The recirculated water of ring heat exchanger is heated to evaporate vapor, so as to which the sensible heat of mixed gas to be converted into the water needed for reforming reaction
Steam, and remove the mixed gas of vapor(Main component is CH4, CO and H2)Changed again by the air-flow of water circulation heat exchanger
The passage of heat outlet flow into methane separation device so that methane therein be separated after from methane gas export discharge, then with profit
Another same flow back in reforming reaction bed and dry granulation device of vapor generated with waste heat is continued to cool down dilval particle and joined
With reforming reaction, and remove the carbon monoxide in the mixed gas of vapor, hydrogen in methane separation device with after methane separation
Export and discharge from mixed tail gas, and then the mixed gas to carbon monoxide, hydrogen can be exported by mixed tail gas(Water-gas)
Collected and utilized, such as to as fuel energy or hydrogen feedstock etc..Granulated processed of the present embodiment to dilval
As a result it is as shown in table 3:
The gained dilval grain graininess of 3 embodiment of table three forms(wt%)
Fig. 3, which is shown, is granulated resulting cooling slag particle in embodiment three., can by the cooling slag particle situation shown in Fig. 3
It is the cooling that method obtains using dilval dry granulation of the present invention and methane vapor reforming waste-heat recovery device to see
Slag particle, its vitrifying degree is very high, and its slag particle particle diameter distribution is uniform, and sphericity is good, and slag wool is few, and granularity is mainly divided
Cloth can directly meet stainless steel-making process requirement in 10 ~ 20mm scopes, and the utilization rate for cooling down slag particle is high.
In summary, dilval dry granulation of the invention and methane vapor reforming waste-heat recovery device structure be more
Simply, production is implemented and uses operation all relatively simple, and combines its dilval dry granulation and methane vapor reforming
Exhaust heat recovering method, while realizing to the granulation processing of liquid molten dilval, additionally it is possible to the waste heat of state dilval
The required resource of methane-steam reforming is converted into by the multistage recovery of Physical joint chemical method, can help to improve
To the recovery utilization rate of dilval residual heat resources, so as to effectively solve the granulation difficult processing for melting dilval in the prior art
The problem of to meet stainless steel-making process requirement and its low residual heat resources recovery utilization rate, there is good commercial Application valency
Value, can smelter popularization and application at home.
Finally illustrate, the above embodiments are merely illustrative of the technical solutions of the present invention and it is unrestricted, although with reference to compared with
The present invention is described in detail good embodiment, it will be understood by those within the art that, can be to the skill of the present invention
Art scheme is modified or equivalent substitution, and without departing from the objective and scope of technical solution of the present invention, it all should cover at this
Among the right of invention.
Claims (6)
1. a kind of dilval dry granulation and methane vapor reforming exhaust heat recovering method, it is characterised in that closed using ferronickel
Golden dry granulation and methane vapor reforming waste-heat recovery device is implemented, the dilval dry granulation and methane vapor weight
Whole waste-heat recovery device includes dry granulation device, reforming reaction bed, slag particle collector, water circulation evaporative condenser, water circulation heat
Exchanger and methane separation device;The top of the dry granulation device is provided with dilval liquid entrance and gas vent, dry granulation
Middle part in device, which is located at the position directly below of dilval liquid entrance, is provided with centrifugal granulation device, the bottom of dry granulation device with
Connect connection at the top of the reforming reaction bed;The bottom of reforming reaction bed is provided with funnelform discharging opening, and reforming reaction
The bottom of bed is provided with methane vapor air inlet close to the side wall of funnel-form discharging opening opening position;The slag particle collector face
It is arranged at the unloading position below the discharging opening of reforming reaction bed, the water circulation evaporative condenser is arranged at slag particle collector
Bottom and heat transfer can be carried out between slag particle collector, and the steam outlet of water circulation evaporative condenser be communicated to weight
The methane vapor air inlet of whole reaction bed;Gas vent at the top of the dry granulation device by be disposed with air exhauster and
The gas channel of deduster is communicated to the air-flow heat exchanger channels entrance of water circulation heat exchanger, by air exhauster certain driving air-flow from dry method
Pelletizer flows to the air-flow heat exchanger channels of water circulation heat exchanger;The air-flow heat exchanger channels outlet of the water circulation heat exchanger connects
The air inlet of methane separation device is passed to, and the recirculated water heat exchange steam (vapor) outlet of water circulation heat exchanger is communicated to reforming reaction bed
Methane vapor air inlet;The methane separation device is used to isolate methane from the gas of entrance, and by isolated first
Alkane and mixed tail gas are respectively from the outlet of its methane gas and mixed tail gas outlet discharge, and the methane gas of methane separation device exports
Also it is communicated to the methane vapor air inlet of reforming reaction bed;Implement as follows:
1)Startup optimization dilval dry granulation and methane vapor reforming waste-heat recovery device, control in its dry granulation device
Centrifugal granulation device rotary speed is 100 ~ 300rpm, and methane water is passed through into reforming reaction bed by its methane vapor air inlet
Steam, driven by the air exhauster on gas channel in dilval dry granulation and methane vapor reforming waste-heat recovery device
Airflow circulating;
2)By the dilval liquid entrance at the top of 1600 ~ 1650 DEG C of liquid molten dilval injection dry granulation device, flow into
Centrifugal granulation device in dry granulation device, is thrown out of under the action of the centrifugal force, subsequently breaks up, is granulated into molten drop, and in-flight
Dilval molten drop carry out heat convection in surface tension and with the air-flow that rises in dry granulation device, be frozen into 1000 ~
1100 DEG C of dilval particle, falls into reforming reaction bed;
3)Dilval particle into reforming reaction bed is continuing whereabouts and the process of stop is piled up in reforming reaction bed
In, the air-flow with rising in reforming reaction bed carries out heat convection again so that dilval particle temperature is down to 700 ~ 750
DEG C, then the discharging opening from reforming reaction bed bottom is emitted into slag particle collector and collected, and the nickel in slag particle collector
Ferroalloy particles carry out heat exchange with water circulation evaporative condenser so that the recirculated water in water circulation evaporative condenser is by thermal evaporation
Go out vapor and vapor is delivered to the methane vapor air inlet of reforming reaction bed by steam outlet, hence into weight
Reforming reaction is participated in whole reaction bed and dry granulation device;
4)In step 2)~3)During, under the swabbing action of the air exhauster on gas channel, from methane vapor air inlet
Methane vapor into reforming reaction bed is flowed upwardly into dry granulation device, and in reforming reaction bed and dry granulation device with
Dilval particle directly contacts, and the oxidation of reforming reaction generation one occurs in the presence of heated and dilval is as catalyst
Carbon and hydrogen, the mixed gas that then carbon monoxide, hydrogen and the complete methane vapor of unreacted are formed is from dry granulation device
The gas vent inflow stream passage at top, enter in the air-flow heat exchanger channels of water circulation heat exchanger to enter after removing dust device dedusting
Row heat exchange, the vapor in mixed gas are condensed separation in the air-flow heat exchanger channels of water circulation heat exchanger, simultaneously so that
The recirculated water of water circulation heat exchanger is heated to be evaporated vapor and is delivered to vapor by recirculated water heat exchange steam (vapor) outlet
The methane vapor air inlet of reforming reaction bed, hence into participating in reforming reaction in reforming reaction bed and dry granulation device;Go
Except the mixed gas of vapor flows into methane separation device by the air-flow heat exchanger channels outlet of water circulation heat exchanger again so that
Remove to export from methane gas after the methane in the mixed gas of vapor is separated in methane separation device and discharge, then pass through
The methane vapor air inlet of reforming reaction bed, which comes back to, participates in reforming reaction in reforming reaction bed and dry granulation device, and goes
Except the carbon monoxide in the mixed gas of vapor, hydrogen are arranged in methane separation device with being exported after methane separation from mixed tail gas
Go out.
2. dilval dry granulation according to claim 1 and methane vapor reforming exhaust heat recovering method, its feature
It is, the rotary drive motor and installation that the centrifugal granulation device in the dry granulation device is set straight up by drive shaft
Porous centrifugation revolving cup in the drive shaft of rotary drive motor is formed;The porous centrifugation revolving cup has a horizontally disposed cup
Bottom and the wall of cup extended straight up along bottom of a cup edge, it is porous to centrifuge the opening up of revolving cup and be right against dry granulation device
Dilval liquid entrance, circumferentially arranged with from bottom of a cup opening position some rows is arranged into from bottom to top on the wall of cup of porous centrifugation revolving cup
Through hole, the thickness of the wall of cup is 5 ~ 10mm, and the aperture of the through hole is 10 ~ 20mm, is arranged in the two neighboring of same a line
Spacing between through hole edge is 5 ~ 10mm, be arranged in spacing between the two neighboring through hole edge of adjacent rows for 6 ~
15mm, and the through hole per adjacent rows is staggered.
3. dilval dry granulation according to claim 1 and methane vapor reforming exhaust heat recovering method, its feature
It is, the water circulation heat exchanger is additionally operable to collect vapor in its air-flow heat exchanger channels and cools down condensed condensed water and lead to
Cross the discharge of condensed water delivery outlet, and the recirculated water collection of the condensation water output and water circulation evaporative condenser of water circulation heat exchanger
Tank is connected.
4. dilval dry granulation according to claim 1 and methane vapor reforming exhaust heat recovering method, its feature
It is, the reforming reaction bed is moving bed or fluid bed.
5. dilval dry granulation according to claim 1 and methane vapor reforming exhaust heat recovering method, its feature
It is, the methane separation device uses stage variable pressure adsorption tower.
6. dilval dry granulation according to claim 1 and methane vapor reforming exhaust heat recovering method, its feature
It is, plate feed is provided between the discharging opening and slag particle collector of the reforming reaction bed, to carry out reforming reaction bed
Feeding of the discharging opening to slag particle collector.
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CN107639233B (en) * | 2017-09-20 | 2019-10-18 | 重庆大学 | A method of ferrosilicon particle is prepared using porous revolving cup centrifugal granulation device |
CN109028979B (en) * | 2018-06-29 | 2019-10-01 | 东北大学 | Liquid magnesium chloride residual neat recovering system and method |
CN108870994B (en) * | 2018-07-20 | 2019-10-25 | 东北大学 | The residual neat recovering system and method for liquid blast furnace |
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