CN107586900B - A kind of method and device of spray-granulated molten blast furnace slag - Google Patents
A kind of method and device of spray-granulated molten blast furnace slag Download PDFInfo
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- CN107586900B CN107586900B CN201710724995.XA CN201710724995A CN107586900B CN 107586900 B CN107586900 B CN 107586900B CN 201710724995 A CN201710724995 A CN 201710724995A CN 107586900 B CN107586900 B CN 107586900B
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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
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The invention discloses a kind of method and devices of spray-granulated molten blast furnace slag; including mixing two phase flow device in liquid slag slag chute, molten bath and venturi type; molten bath outlet connects the top liquid slag entrance that two phase flow device is mixed in venturi type by pipeline; liquid slag entry bottom is connected to receiving chamber; contraction type, which is fed on the inside of nozzle, connects high-temperature flue gas entry; high-temperature flue gas entry is connected to the outlet of air compressor machine, the gas outlet at the top of the entrance connection molten bath of air compressor machine by pipeline；Receiving chamber outlet connects one end of mixing chamber by mixing chamber inlet, the other end connection atomization mixing chamber of mixing chamber, it is atomized mixing chamber and external air blower, high-pressure hydraulic pump is distinguished by atomizing air inlets, atomization water inlet, the exit for being atomized mixing chamber is provided with atomizer；The configuration of the present invention is simple, movement-less part are suitable for operation steady in a long-term, and a little repair is easy to use, the mainly reasonable utilization to the recycling of high-temperature molten slag and waste heat, realize and maximize interests.
Description
Technical field
The present invention relates to molten blast furnace slag pelletization device technical field, in particular to a kind of spray-granulated molten blast furnace slag
Method and device.
Background technique
Molten blast furnace slag particleization can be divided into two kinds of wet type, dry type, and what wet granulation was taken is the side of water quenching granulating liquid slag
Method, granulation effect is good, and vitreum content is high, and crystallinity is low, conducive to adding in cement and concrete, but melts the aobvious of high temperature sludge
Heat and latent heat cannot recycle, and when water quenching will consume a large amount of water, and when grinding dries the moisture in granulated slag again.
The method that dry granulation carried out the quenching dry type granulated blast-furnace slag of commerical test has roller rotary drum method, wind quenching method
With centrifugal granulation method, chemical shotting；Drum process there is processing capacities not high, equipment operation rate is crushed the ability of liquid slag
Deficiency, broken slag particle particle size distribution range is big, and small with the heat exchange area of heat transferring medium, heat exchange efficiency is low, and cooling velocity is insufficient,
Granulated slag vitreum content is low；Wind quenching method granulation liquid slag particle size range is too wide, and air cooling slag speed is slow, causes power consumption
Greatly, equipment size is huge, and centrifugal granulation method has granulation epigranular, and particle size distribution is narrow, and flow losses are small, is currently to compare
Relatively good granulating method；But, to the more demanding of mechanical energy, revolving speed is higher for it, and it is better to be granulated, this makes motor and shaft
Stability proposes requirements at the higher level, and especially in the event of high temperatures, and its centrifugal granulation cone angle is larger, is not easy to be situated between with heat exchange
The heat exchange of matter.
Above-mentioned dry granulation technique in the prevalence of pay attention to blast furnace cinder utilization, and have ignored it includes huge heat
Energy.The characteristics of molten blast furnace slag, is: 1, high-temperature fusion liquid (1400-1600 DEG C)；2, sharply increase as temperature reduces its viscosity
It is high；3, the low (0.1-0.3W (m/K) of liquid slag thermal coefficient.
The technical requirements of UTILIZATION OF VESIDUAL HEAT IN dry granulation are: 1, high-temperature molten slag can be made to be granulated granulation granularity as small as possible；
2, the sensible heat and latent heat of liquid slag can efficiently be recycled；3, the operation of energy continuous-stable；4, being granulated slag after cooling should crystallize
It is high to spend low vitreum content, does not influence the use in cement and concrete.
The difficult point of dry granulation technology is that the liquid of high-temperature fusion will be granulated as far as possible in the case where viscosity does not increase
Small granulation granularity needs as far as possible to reduce the size of granulated slag because liquid slag pyroconductivity is very low, to strengthen cooling effect
Fruit is convenient for later use.So to take into account the cooling rate and waste heat recovering effect of granulated slag.
Summary of the invention
The object of the present invention is to provide high-temperature molten slag method spray-granulated with high-temperature gas under liquid condition and dresses
It sets, is granulated granularity in 1mm hereinafter, increasing heat exchange area to realize, strengthens cooling rate, reach waste heat recycling and cooling effect,
Solve the granulation problem of dry granulation.
In order to solve the above-mentioned technical problems, the present invention provides the following technical solutions:
The present invention provides a kind of method and device of spray-granulated molten blast furnace slag, including liquid slag slag chute, molten bath and text
Qiu Lishinei mixes two phase flow device, and liquid slag slag chute is connected to molten bath entrance, and molten bath outlet is connected in venturi type by pipeline to be mixed
The top liquid slag entrance of two phase flow device, liquid slag entry bottom are connected to receiving chamber, and the external contraction type of the entrance of receiving chamber supplies
Expect nozzle, contraction type, which is fed on the inside of nozzle, connects high-temperature flue gas entry, and high-temperature flue gas entry is connected to going out for air compressor machine by pipeline
Mouthful, the gas outlet at the top of the entrance connection molten bath of air compressor machine；Receiving chamber outlet connects one end of mixing chamber by mixing chamber inlet,
The other end connection atomization mixing chamber of mixing chamber, atomization mixing chamber upper and lower ends are respectively arranged with atomizing air inlets, atomized water
Entrance, atomization mixing chamber distinguish external air blower, high-pressure hydraulic pump by atomizing air inlets, atomization water inlet, are atomized mixing chamber
Exit be provided with atomizer.
As a preferred technical solution of the present invention, the pressure that air compressor machine compresses high-temperature flue gas is 150-700KPa.
As a preferred technical solution of the present invention, the outlet wind pressure of air blower is 29KPa.
Two phase flow bottom of device, which is mixed, as a preferred technical solution of the present invention, in venturi type is provided with Si-Mo rod.
As a preferred technical solution of the present invention, molten bath side is fixedly installed burner, burner external power supply.
Liquid slag in liquid slag slag chute of the present invention flows into molten bath, and molten bath has certain volume, certain convenient for storage
The liquid slag of amount avoids causing production to be interrupted because blast furnace is interrupted slagging, separately be added by burner to liquid slag in molten bath
Heat, heat preservation, it is ensured that the viscosity and mobility of liquid slag, and the liquid slag with certain viscosity and mobility flows into literary mound through pipeline
Li Shinei is mixed in two phase flow device；The high-temperature flue gas of generation of burning in molten bath enters air compressor machine through molten bath top exit, through sky
Press compression passes through the high-temperature flue gas entry of two phase flow device side mixed in venturi type at the high-temperature flue gas with certain pressure intensity
The contraction type of entrance is fed nozzle；It is sprayed from contraction type feed nozzle at high speeds, high-speed flow passes through receiving chamber, and high-speed flow is connecing
It receives interior and causes the pressure for being equal to or less than atmospheric pressure, connect so that liquid slag liquid be made to fall into or be inhaled into from liquid slag entrance
It receives in room, is entered in mixing chamber in company with high-speed flow by mixing chamber inlet, liquid slag liquid and high-speed flow are in mixing chamber
Further enter atomization mixing chamber after mixing, and and two-phase is then mixed into venturi type from air blower, high-pressure hydraulic pump respectively
It flows the atomizing air conveyed in the entrance of the atomization mixing chamber of device, atomized water to spray from atomizer high speed together, speed
It spends up to supersonic speed, liquid slag is made to be atomized into fine mist；And Si-Mo rod is to two phase flow device mixed in venturi type during this period
It heated, kept the temperature, it is ensured that liquid slag mixes the liquid phase state in two phase flow device in venturi type.
The beneficial effects obtained by the present invention are as follows being:
1, the configuration of the present invention is simple, movement-less part is suitable for operation steady in a long-term, and a little repair is easy to use, mainly
The reasonable utilization of recycling and waste heat to high-temperature molten slag is realized and maximizes interests；Liquid slag passes through preheating, heating, heat preservation, from
Begin to the liquid for being eventually always flowing, viscosity does not influence its mobility, until spraying mixed two phase flow atomization in venturi type
Device；Although there is preheating, heating and heat-insulation system in Venturi simultaneously, this partial heat is with liquid slag and wind
Heat exchange, without heat loss；
2, the liquid slag that presentation liquid phase in two-phase flow atomization device is mixed in venturi type is easy to and high-temperature flue gas, air
It is mixed to form biphase gas and liquid flow, is mixed twice, is sprayed twice, velocity of sound liquid slag is accelerated to and is atomized into uniform-mist less than 1mm
Drop, the partial size for being atomized formation is small, and surface area is big, that is, heat exchange area is high, and heat exchange rate is high, enhances pyroconductivity；And it changes
Hot rate is high, and liquid slag can be by chilling, and vitreum content is high, is more advantageous to subsequent use；
3, Venturi nozzle is that gas liquid ratio is adjustable, that is to say, that can have relatively high material-gas ratio, save compressed air, phase
It is few to compare power consumption.
Detailed description of the invention
Attached drawing is used to provide further understanding of the present invention, and constitutes part of specification, with reality of the invention
It applies example to be used to explain the present invention together, not be construed as limiting the invention.
In the accompanying drawings:
Fig. 1 is that two phase flow device schematic diagram of internal structure is mixed in venturi type of the present invention；
Fig. 2 is overall structure of the present invention；
Figure label: 1, liquid slag slag chute；2, molten bath；3, molten bath heating, thermal insulation combustor；4, two-phase is mixed in venturi type
Flow device；4-1, high-temperature flue gas entry；4-2, contraction type are fed nozzle；4-3, receiving chamber；4-4, liquid slag entrance；4-5, mixing
Chamber inlet；4-6, mixing chamber；4-7, atomizing air inlets；4-8, atomization water inlet；4-9, atomization mixing chamber；4-10, atomization spray
Mouth；5, air compressor machine；6, air blower；7, high-pressure hydraulic pump；8, Si-Mo rod.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments, is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The present invention discloses a kind of technical solution referring to FIG. 1-2: a kind of method and dress of spray-granulated molten blast furnace slag
It sets, including mixes two phase flow device (4) in liquid slag slag chute (1), molten bath (2) and venturi type, liquid slag slag chute (1) is connected to molten bath
(2) entrance, molten bath (2) outlet connect the top liquid slag entrance (4- that two phase flow device (4) are mixed in venturi type by pipeline
4), the liquid slag entrance bottom (4-4) connection receiving chamber (4-3), the external contraction type of the entrance of receiving chamber (4-3) are fed nozzle (4-
2) high-temperature flue gas entry (4-1), is connected on the inside of contraction type feed nozzle (4-2), high-temperature flue gas entry (4-1) is connected to by pipeline
The outlet of air compressor machine (5), the entrance of air compressor machine (5) connect the gas outlet at the top of molten bath (2)；Receiving chamber (4-3) outlet passes through mixed
Close one end of chamber inlet (4-5) connection mixing chamber (4-6), other end connection atomization mixing chamber (4-9) of mixing chamber (4-6), mist
Change mixing chamber (4-9) upper and lower ends and be respectively arranged with atomizing air inlets (4-7), atomization water inlet (4-8), is atomized mixing chamber
(4-9) is separately connected air blower (6), high-pressure hydraulic pump (7) by atomizing air inlets (4-7), atomization water inlet (4-8), is atomized
The exit of mixing chamber (4-9) is provided with atomizer (4-10).The present invention provides high-temperature molten slags in liquid Direct spraying
Granulated system and device, including three parts: first is that regenerator section, second is that liquid slag heating, insulating sections, third is that atomising device
Part.Regenerator section is the Si-Mo rod 8 that molten bath 2, associated conduit and atomising device is arranged in and is preheated；Liquid slag heating is protected
Isothermal segment is that the burner 3 of burning or heated by electrodes in molten bath 2 is arranged in；Atomising device part includes compression 2 internal combustion of molten bath
The air compressor machine 5 that high-temperature flue gas is supplied to atomising device is burnt, the wind of secondary-atomizing and cooling effect and the equipment air blower of water are provided
6, two-phase flow atomization device 4 is mixed in high-pressure hydraulic pump 7 and venturi type.The high temperature cigarette that liquid slag is heated and is kept the temperature in molten bath 2
Gas makes high-temperature flue gas be pressurized to 150-700KPa by air compressor machine 5, is sent in venturi type and mixes two-phase flow atomization device 4, as
Jet stream high-temperature gas；6 entrance wind-warm syndrome of air blower is lower than atmospheric temperature, fan outlet wind pressure 29KPa, as in venturi type
The secondary jet and the cooling air after atomization ejection of mixed two-phase flow atomization device；High-pressure hydraulic pump 7, high pressure water is in venturi type
With the air mixing atomizing ejection of secondary jet in mixed two-phase flow atomization device 4, liquid slag is cooled down.
Molten bath (2) side is fixedly installed burner (3), burner (3) external power supply；Two phase flow dress is mixed in venturi type
It sets (4) bottom to be provided with Si-Mo rod (8), two-phase flow atomization device 4 and associated conduit is mixed in molten bath 2, venturi type through silicon molybdenum
Stick (8) is preheating to 1200 DEG C, is preheated 1200 DEG C of molten bath 2 and receives liquid slag, the combustion that molten bath 2 is equipped with by liquid slag slag chute 1
Burner 3 is heated and is kept the temperature to liquid slag, so that liquid slag is maintained the temperature at 1400 DEG C or so, viscosity is controlled 0.075-
0.1Pa.s controls the temperature of liquid slag according to the viscosity of liquid slag.
Working principle:
Liquid slag in liquid slag slag chute 1 of the present invention flows into molten bath 2, and molten bath 2 has certain volume, convenient for storage one
Quantitative liquid slag is avoided causing production to be interrupted because blast furnace is interrupted slagging, separately be carried out by burner 3 to liquid slag in molten bath
Heating, heat preservation, it is ensured that the viscosity and mobility of liquid slag, and the liquid slag with certain viscosity and mobility flows into text through pipeline
Qiu Lishinei is mixed in two phase flow device 4；The high-temperature flue gas of generation of burning in molten bath 2 enters air compressor machine through 2 top exit of molten bath
5, the high-temperature flue gas with certain pressure intensity, which is compressed into, through air compressor machine 5 passes through the high temperature of 4 side of two phase flow device mixed in venturi type
The contraction type that smoke inlet 4-1 enters is fed nozzle 4-2；It is fed nozzle 4-2 high speed ejection from contraction type, high-speed flow is by connecing
Room 4-3 is received, high-speed flow causes the pressure equal to or less than atmospheric pressure in receiving chamber 4-3, to make liquid slag liquid from molten
Melt slag entrance 4-4 to fall into or be inhaled into receiving chamber 4-3, mixing chamber is entered by mixing chamber inlet 4-5 in company with high-speed flow
In 4-6, liquid slag liquid and high-speed flow further enter atomization mixing chamber 4-9 after mixing in mixing chamber 4-6, and and
It is then mixed into venturi type from air blower 6, high-pressure hydraulic pump 7 and is conveyed in the entrance of the atomization mixing chamber 4-9 of two phase flow device 4 respectively
Atomizing air, atomized water sprayed together from atomizer 4-10 high speed, speed is atomized into liquid slag up to supersonic speed
Fine mist；And Si-Mo rod 8 heats two phase flow device 4 mixed in venturi type, is kept the temperature during this period, it is ensured that liquid slag exists
The liquid phase state in two phase flow device 4 is mixed in venturi type.
Finally, it should be noted that these are only the preferred embodiment of the present invention, it is not intended to restrict the invention, although
Present invention has been described in detail with reference to the aforementioned embodiments, for those skilled in the art, still can be right
Technical solution documented by foregoing embodiments is modified or equivalent replacement of some of the technical features.It is all
Within the spirit and principles in the present invention, any modification, equivalent replacement, improvement and so on should be included in protection of the invention
Within the scope of.
Claims (6)
1. a kind of device of spray-granulated molten blast furnace slag, which is characterized in that including liquid slag slag chute (1), molten bath (2) He Wenqiu
Li Shinei mixes two phase flow device (4), and liquid slag slag chute (1) is connected to molten bath (2) entrance, and molten bath (2) outlet connects text by pipeline
Qiu Lishinei mixes the top liquid slag entrance (4-4) of two phase flow device (4), and the liquid slag entrance bottom (4-4) is connected to receiving chamber (4-
3), external contraction type feed nozzle (4-2) of the entrance of receiving chamber (4-3), contraction type, which is fed on the inside of nozzle (4-2), connects high temperature cigarette
Gas entrance (4-1), outlet of the high-temperature flue gas entry (4-1) by pipeline connection air compressor machine (5), the entrance connection of air compressor machine (5)
Gas outlet at the top of molten bath (2)；Receiving chamber (4-3) outlet connects the one end of mixing chamber (4-6) by mixing chamber inlet (4-5),
Other end connection atomization mixing chamber (4-9) of mixing chamber (4-6), atomization mixing chamber (4-9) upper and lower ends are respectively arranged with atomization
Air intake (4-7), atomization water inlet (4-8), atomization mixing chamber (4-9) pass through atomizing air inlets (4-7), atomization water inlet
(4-8) external air blower (6), high-pressure hydraulic pump (7), the exit of atomization mixing chamber (4-9) are provided with atomizer (4- respectively
10).
2. a kind of device of spray-granulated molten blast furnace slag according to claim 1, which is characterized in that air compressor machine (5) pressure
The pressure of contracting high-temperature flue gas is 150-700KPa.
3. a kind of device of spray-granulated molten blast furnace slag according to claim 1, which is characterized in that air blower (6)
Outlet wind pressure is 29KPa.
4. a kind of device of spray-granulated molten blast furnace slag according to claim 1, which is characterized in that mixed in venturi type
Two phase flow device (4) bottom is provided with Si-Mo rod (8).
5. a kind of device of spray-granulated molten blast furnace slag according to claim 1, which is characterized in that molten bath (2) side
It is fixedly installed burner (3), burner (3) external power supply.
6. a kind of method of spray-granulated molten blast furnace slag, it is characterised in that:
Liquid slag in liquid slag slag chute (1) flows into molten bath (2), and molten bath (2) have certain volume, a certain amount of convenient for storing
Liquid slag, avoid because blast furnace be interrupted slagging due to cause production be interrupted, separately liquid slag in molten bath is added by burner (3)
Heat, heat preservation, it is ensured that the viscosity and mobility of liquid slag, and the liquid slag with certain viscosity and mobility flows into literary mound through pipeline
Li Shinei is mixed in two phase flow device (4)；The high-temperature flue gas that burning generates in molten bath (2) enters sky through molten bath (2) top exit
Press (5) is compressed into the high-temperature flue gas with certain pressure intensity by mixing two phase flow device (4) in venturi type through air compressor machine (5)
The high-temperature flue gas entry (4-1) of side enters contraction type feed nozzle (4-2)；It is fed nozzle (4-2) high speed ejection from contraction type,
High-speed flow passes through receiving chamber (4-3), and high-speed flow causes the pressure equal to or less than atmospheric pressure in receiving chamber (4-3), from
And fall into liquid slag liquid or be inhaled into receiving chamber (4-3) from liquid slag entrance (4-4), pass through in company with high-speed flow mixed
It closes chamber inlet (4-5) to enter in mixing chamber (4-6), liquid slag liquid and high-speed flow further mix in mixing chamber (4-6)
Enter atomization mixing chamber (4-9) after uniformly, and and two phase flow is mixed into venturi type from air blower (6), high-pressure hydraulic pump (7) respectively
Atomizing air, the atomized water conveyed in the entrance of the atomization mixing chamber (4-9) of device (4) is high from atomizer (4-10) together
Speed sprays, and speed makes liquid slag be atomized into fine mist up to supersonic speed；And Si-Mo rod (8) is to venturi type during this period
Interior mixed two phase flow device (4) is heated, is kept the temperature, it is ensured that liquid slag mixes the liquid phase in two phase flow device (4) in venturi type
State.
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