CN205990415U - A kind of monolayer for being reduced directly the mode of production heats and frequency modulation type rotary hearth furnace - Google Patents
A kind of monolayer for being reduced directly the mode of production heats and frequency modulation type rotary hearth furnace Download PDFInfo
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- CN205990415U CN205990415U CN201621051766.3U CN201621051766U CN205990415U CN 205990415 U CN205990415 U CN 205990415U CN 201621051766 U CN201621051766 U CN 201621051766U CN 205990415 U CN205990415 U CN 205990415U
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Abstract
This utility model is related to steel industry and coloured industry using direct-reduction manufacturing technique method and equipment, belongs to field of metallurgy and in particular to a kind of monolayer for being reduced directly the mode of production heats and frequency modulation type rotary hearth furnace.This rotary hearth furnace includes annular body of heater, rotatable ring-shaped furnace bottom, heat power engineering system and furnace bottom support and drive system；Wherein：Described annular body of heater includes：Annular furnace, frequency modulation type vibration material distributor and discharging machine；Wherein, described frequency modulation type vibration material distributor includes material distributing machine main body, vibrating spring, vibrating motor, and frequency modulator switchs；Described heat power engineering system includes：Multiple drying tubes and multiple burner；Described furnace bottom support and drive system are arranged on described preheating zone and the base positioned at described rotatable ring-shaped furnace bottom bottom of described reducing zone.This rotary hearth furnace passes through to set up frequency modulator in material distributing machine, the corresponding feedback signal that control material flow is formed, and automatically adjusts technological process, has that technological process is short, equipment operation rate is high and low power consumption and other advantages.
Description
Technical field
This utility model is related to steel industry and coloured industry using direct-reduction manufacturing technique method and equipment, belongs to smelting
Golden collar domain is and in particular to a kind of monolayer for being reduced directly the mode of production heats and frequency modulation type rotary hearth furnace.
Background technology
At present, coal-based DR process has multiple, and wherein, because rotary hearth furnace reduction technique has, equipment is simple, operation
Easily, with short production cycle, response speed is fast, advantages of environment protection, so rotary hearth furnace reduction technique has caused widely
Concern.The ultimate principle of rotary hearth iron making is by the flat flame burner burning positioned at furnace sidewall, and the high temperature of flame is passed by radiation
Feed layer surface pelletizing, so that the metal-oxide in carbonaceous pelletizing is reduced at high temperature, heating energy source more adopt natural gas,
Cracked gas, coke-stove gas, coal gas of converter and coal gas etc., energy sources is quite varied.Using rotary hearth furnace equipment DRI
(DRI) technique mainly includes the following steps that：Iron Ore Powder is mixed homogeneously with reducing agent coal dust, is pressed into carbonaceous pelletizing ore deposit, dry；
The carbonaceous pelletizing being dried equably is layered on rotary hearth furnace, make reduced zone in rotary hearth furnace for the carbonaceous pelletizing (temperature up to
1100 DEG C～1400 DEG C) in be reduced 15min-30min, you can obtain the metallized pellet that degree of metalization is more than 85%.Turn
The advantage that bottom furnace apparatus are used for producing DRI is, reduction temperature is high, the time is short, furnace charge keeps relative transfixion with furnace bottom,
Thus avoiding the problems such as rotary kiln, fluid bed bonding, shaft furnace dross.But adopt the more ripe work of rotary hearth furnace direct-reduction at present
Skill is distributed into rotary hearth furnace after mostly being the pretreatment of raw material such as batch mixing, ball processed, drying again, and before rotary hearth furnace reduction, pretreatment process is complicated, disappears
Consume substantial amounts of manpower and materials and carry out Technological Process Management, it is long to have a technological process of production, equipment investment is big, production cost is high, energy
Consuming high defect, additionally, adopting burner formula mode of heating existing rotary hearth furnace, but because cloth material mouth is in the annular space of rotary hearth furnace more
There is certain difference in height in top and furnace bottom, material enters that in stove initial stage stove, Dust Capacity is larger, is easily caused cloth material mouth near zone and burns
Mouth blocking is thus affect to produce direct motion.Therefore how to design one kind automatically control and adjust technological process, equipment operation rate high and
The low rotary hearth furnace of energy consumption becomes the technical problem of this area urgent need to resolve.
Utility model content
This utility model is directed to the deficiencies in the prior art it is proposed that a kind of monolayer for being reduced directly the mode of production heats
And frequency modulation type rotary hearth furnace, this rotary hearth furnace pass through set up frequency modulator in material distributing machine, automatically control and adjust technological process, there is work
Skill flow process is short, equipment investment is low, equipment operation rate is high and low power consumption and other advantages.
For solving above-mentioned technical problem, the technical solution adopted in the utility model is：
The utility model proposes a kind of monolayer for being reduced directly the mode of production heats and frequency modulation type rotary hearth furnace, this turn
Bottom stove includes annular body of heater, rotatable ring-shaped furnace bottom, heat power engineering system and furnace bottom support and drive system；Wherein：Described annular furnace
Body includes：Annular furnace, frequency modulation type vibration material distributor and discharging machine, described annular furnace by annular furnace wall, furnace roof, preheating zone and
Reducing zone division wall and discharge end barricade are constituted, and form feed zone adjacent successively, preheating zone, reducing zone and discharge zone, wherein,
Described partition wall is located between described preheating zone and described reducing zone, and described discharge end barricade is located at described reducing zone and described discharging
Between area, described partition wall and described barricade are extended downwardly by the roof of described rotary hearth furnace, and protect with described rotatable ring-shaped furnace bottom
Hold certain intervals；The two ends of described annular furnace are provided with the independent frequency modulation type vibration material distributor for charging and for discharging
Discharging machine, wherein, described frequency modulation type vibration material distributor includes material distributing machine main body, vibrating spring, vibrating motor and frequency modulator switch；
Described heat power engineering system includes：Multiple drying tubes and multiple burner, wherein, described drying tube be arranged on described preheating zone positioned at institute
State on the furnace wall side wall between rotatable ring-shaped furnace bottom and furnace roof, heat for pipe mode is dried to described preheating zone, institute
State burner to be arranged on the furnace wall side wall of described reducing zone, for described reducing zone is carried out with burner mode heating；Described furnace bottom
Support and drive system are arranged on the base positioned at described rotatable ring-shaped furnace bottom bottom of described preheating zone and described reducing zone
On.
Inventor finds, according to this rotary hearth furnace of this utility model embodiment, with conventional rotary hearth furnace all using furnace wall side wall
The mode of burner heating is compared, and sets up drying tube preheating zone and set in preheating zone and reduction interval in rotary hearth furnace of the present utility model
Put partition wall, efficiently solve the problems, such as that material enters the stove initial stage because leading to powder burner to block more；And, this utility model can adopt
Wet block or wet bulb directly enter the flow processing raw material of rotary hearth furnace, shorten technological process, reduce equipment investment, production cost
And energy consumption；This utility model rotary hearth furnace can adopt regenerative combustion technology simultaneously, can be using inferior or low-rank fuel, fall
Low fuel cost, can at home and lack the area popularization of natural gas and high-grade fuel；Additionally, by setting up in material distributing machine
Frequency modulator, when the flow of material is correspondingly formed FM signal, adjusts material feedback letter number by controlling frequency modulator, reaches control thing
The effect of stream amount, automatically controls and adjusts technological process, cost savings manpower and materials, reaches the effect of auto-control
Really.
According to embodiment of the present utility model, described preheating zone heating-up temperature is 400 DEG C -1000 DEG C.
According to embodiment of the present utility model, the horizontal cross-section of described rotary hearth furnace is annular, and described preheating zone annulus presss from both sides
Angle is 30 ° -100 °.
According to embodiment of the present utility model, described feed zone, preheating zone, reducing zone and discharge zone are along described rotable ring
The rotation direction of shape furnace bottom is arranged in order.
According to embodiment of the present utility model, described drying tube is located at described rotatable ring-shaped furnace bottom 1/3 spacing, institute
Stating spacing is the distance between described rotatable ring-shaped furnace bottom and furnace roof.
According to embodiment of the present utility model, described preheating zone furnace wall is provided with exhaust opening, and inner flue gas of the stove is from described smoke evacuation
Mouth is discharged, for preheated fuel gas combustion air and secondary wind.
According to embodiment of the present utility model, corresponding with described annular furnace wall in described rotatable ring-shaped furnace bottom lower surface
Excircle at, be provided with for furnace bottom sealing furnace bottom water sealed tank.
This utility model at least has the advantages that：
1., compared with conventional rotary hearth furnace is all by the way of the heating of furnace wall burner on sidewall, increase in rotary hearth furnace of the present utility model
If drying tube preheating zone is simultaneously in preheating zone and reduction interval setting partition wall, efficiently solves material and enter the stove initial stage because leading to powder more
The problem of burner blocking.
2. this utility model can directly enter the flow processing raw material of rotary hearth furnace using wet block or wet bulb, shortens technique stream
Journey, reduces equipment investment, production cost and energy consumption.
3. this utility model rotary hearth furnace can adopt regenerative combustion technology, can be reduced using inferior or low-rank fuel
Fuel cost, can promote with the area lacking natural gas and high-grade fuel at home.
4. this utility model passes through to set up frequency modulator in material distributing machine, when the flow of material is correspondingly formed FM signal, leads to
Cross control frequency modulator and adjust material feedback letter number, reach the effect of control material flow, automatically control and adjust technological process, greatly
The earth saves manpower and materials, reaches the effect of auto-control.
Brief description
Fig. 1 is the schematic top plan view of this utility model rotary hearth furnace.
Fig. 2 is the sectional schematic diagram of this utility model rotary hearth furnace burner hearth.
Fig. 3 is the elevational schematic view of this utility model rotary hearth furnace.
Wherein, feed zone 1, preheating zone 2, reducing zone 3, discharge zone 4, exhaust opening 5, preheating zone and reducing zone division wall 6, go out
Material terminal block wall 7, drying tube 8, burner 9, frequency modulation type vibration material distributor 10, vibrating spring 11, vibrating motor 12, frequency modulator switchs
13, discharging machine 14, furnace roof 15, annular furnace wall 16, furnace bottom water sealed tank 17, material bed 18, rotatable ring-shaped furnace bottom 19, furnace bottom support
And drive system 20, base 21.
Specific embodiment
In order that those skilled in the art more fully understand the technical solution of the utility model, with reference to specific embodiment
The utility model is described in further detail.The embodiments described below is exemplary, is only used for explaining that this practicality is new
Type, and it is not intended that to restriction of the present utility model.
The utility model proposes a kind of monolayer for being reduced directly the mode of production heats and frequency modulation type rotary hearth furnace.According to
Embodiment of the present utility model, Fig. 1 is the schematic top plan view of this utility model rotary hearth furnace, and Fig. 2 is this utility model rotary hearth furnace
The sectional schematic diagram of burner hearth, sees figures.1.and.2 shown, this rotary hearth furnace includes：Annular body of heater, rotatable ring-shaped furnace bottom 19, thermal technology
System and furnace bottom support and drive system 20；Wherein：Described annular body of heater includes：Annular furnace, frequency modulation type vibration material distributor 10
With discharging machine 14, described annular furnace is by annular furnace wall 16, furnace roof 15, preheating zone and reducing zone division wall 6 and discharge end barricade 7
Constitute；Described partition wall and described barricade are extended downwardly by the roof of described rotary hearth furnace, and keep with described rotatable ring-shaped furnace bottom
Certain intervals；The two ends of described annular furnace are provided with the independent frequency modulation type vibration material distributor for charging and going out for discharging
Material machine, wherein, described frequency modulation type vibration material distributor includes material distributing machine main body, vibrating spring 11, vibrating motor 12 and frequency modulator and opens
Close 13；Described heat power engineering system includes：Multiple drying tubes 8 and multiple burner 9, wherein, described drying tube is arranged on described preheating zone
On the furnace wall side wall between described rotatable ring-shaped furnace bottom and furnace roof, for pipe mode is dried to described preheating zone
Heating, described burner is arranged on the furnace wall side wall of described reducing zone, for described reducing zone is carried out with burner mode heating；Institute
State furnace bottom support and drive system be arranged on described preheating zone and described reducing zone positioned at described rotatable ring-shaped furnace bottom bottom
Base 21 on.
Inventor finds, according to this rotary hearth furnace of this utility model embodiment, with conventional rotary hearth furnace all using furnace wall side wall
The mode of burner heating is compared, and sets up drying tube preheating zone and set in preheating zone and reduction interval in rotary hearth furnace of the present utility model
Put partition wall, efficiently solve the problems, such as that material enters the stove initial stage because leading to powder burner to block more；And, this utility model can adopt
Wet block or wet bulb directly enter the flow processing raw material of rotary hearth furnace, shorten technological process, reduce equipment investment, production cost
And energy consumption；This utility model rotary hearth furnace can adopt regenerative combustion technology simultaneously, can be using inferior or low-rank fuel, fall
Low fuel cost, can at home and lack the area popularization of natural gas and high-grade fuel；Additionally, by setting up in material distributing machine
Frequency modulator, when the flow of material is correspondingly formed FM signal, adjusts material feedback letter number by controlling frequency modulator, reaches control thing
The effect of stream amount, automatically controls and adjusts technological process, cost savings manpower and materials, reaches the effect of auto-control
Really.
According to embodiment of the present utility model, the concrete species of the mode of described frequency modulation is unrestricted, can be for once adjusting
Frequently, manual frequency modulation or automatic frequency adjustment, according to some embodiments of the present utility model, this utility model is preferably automatic frequency adjustment, institute
State frequency modulation type vibration material distributor also to include：Frequency modulator and frequency modulation switch, by setting up frequency modulator in material distributing machine, when the stream of material
Amount is correspondingly formed FM signal, adjusts material feedback letter number by controlling frequency modulator, reaches the effect of control material flow, automatically
Control and adjust technological process, cost savings manpower and materials, reach the effect of auto-control.
According to embodiment of the present utility model, Fig. 3 is the elevational schematic view of this utility model rotary hearth furnace, with reference to Fig. 3 institute
Show, feed zone 1 adjacent successively in described annular furnace, heating-up temperature are 400 DEG C -1000 DEG C of preheating zone 2, reducing zone 3 and
Discharge zone 4 is arranged in order along the rotation direction of described rotatable ring-shaped furnace bottom, wherein, described preheating zone and reducing zone division wall position
Between described preheating zone and described reducing zone, described discharge end barricade is located between described reducing zone and described discharge zone, root
According to embodiment of the present utility model, partition wall is set between preheating zone and reducing zone, can prevent material from entering the powder of stove initial stage generation
Dirt enters reducing zone impact and produces direct motion, arranges barricade in discharge end in addition, reducing zone is constituted semi-hermetic structure, can effectively protect
Hinder the reducing atmosphere of whole reducing zone, improve metal reduction effect.
According to embodiment of the present utility model, this utility model passes through to set up drying tube preheating zone in rotary hearth furnace, and this is done
Dry pipe is arranged at rotatable stove bottom and furnace roof spacing furnace wall side wall at furnace bottom 1/3, and drying tube setting closely will very much away from furnace bottom material
Convective Heating effect in impact stove, poor and larger close to furnace roof heat loss away from the too remote radiant heat transfer effect of material；Using hot spoke
Penetrate mode preheating material, with conventional rotary hearth furnace all using furnace wall burner on sidewall heating by the way of compared with, efficiently solve material and enter
There is certain difference in height at the annular space top of rotary hearth furnace with furnace bottom due to frequency modulation type vibration material distributor in the stove initial stage, material enters
The problem of the larger easy blocking burner of Dust Capacity in stove initial stage stove, drying tube heating-up temperature is 400 DEG C -1000 DEG C, can be to mixture
Material is preheated, and effectively removes table water and the water of crystallization in stove material, can be direct on the premise of not affecting product index
Wet block or wet bulb enter stove, decrease the pressure ball before rotary hearth furnace and pelletizing stoving process, shorten technological process, reduce and set
Standby investment, has the advantages that handling process is short, equipment investment is low, equipment operation rate is high, energy consumption is low, has wide range of applications.
According to embodiment of the present utility model, the concrete material of described preheating zone and reducing zone division wall is unrestricted, only
The effect of separation can be played, can be refractory brick or fire resisting stamp mass etc., according to some enforcements of the present utility model
Example, this utility model is preferably refractory brick.
According to embodiment of the present utility model, the concrete material of described discharge end barricade is unrestricted, as long as can play
The effect stopping, can be refractory brick or fire resisting stamp mass etc., and according to some embodiments of the present utility model, this practicality is new
Type is preferably refractory brick.During work, material is by the frequency modulation type vibration material distributor 10 of rotary hearth furnace charging zone 1 by uniform for material cloth
Put and form material bed 18 in rotary furnace bottom, drive furnace bottom to rotate by furnace bottom drive system 20, the pre- furnace bottom of material is no transported relatively
Dynamic, the rotation with furnace bottom sequentially passes through preheating zone 2, reducing zone 3 in burner hearth, by setting up drying tube preheating zone in stove, in advance
Hot-zone annulus angle is 30 ° -100 °, and using Electric heating, the temperature of heating is 400 DEG C -1000 DEG C, can effectively remove into stove
Table water in material and water of crystallization simultaneously reduce carbon scaling loss in material；By frequency modulator is set up on material distributing machine, when the flow of material
It is correspondingly formed FM signal, adjust material feedback letter number by controlling frequency modulator, reach the effect of control material flow, reducing zone
Using outboard sidewalls heat-accumulating burner mode of heating, fuel cost can be reduced using inferior or low-rank fuel, improve material
Reduction effect, material is discharged rotary hearth furnace, in stove by the discharging machine 14 through rotary hearth furnace discharge zone 4 for the reducing material generating after reduction
Flue gas is discharged from exhaust opening 5, and the gas-fired combustion-supporting wind needed for rotary hearth furnace and secondary wind are preheated by fume afterheat recycling, preheating
Gas-fired combustion-supporting wind afterwards and secondary wind are connected to the heater of rotary hearth furnace by pipeline.
According to embodiment of the present utility model, the concrete shape of the horizontal cross-section of described rotary hearth furnace is unrestricted, according to this
Some embodiments of utility model, this utility model is preferably annular, and described preheating zone annulus angle is preferably 30 ° -100 °,
This utility model rotary hearth furnace drying tube preheating zone annulus angle is no less than 30 °, if annulus angle is less than 30 °, material is pre-
Hot-zone remaining time is too short, can lead to material moisture removing not exclusively, and residual moisture removes the reduction of impact material area in reducing zone
Property, reduce the percent reduction of valuable metal, but cross senior general when rotary hearth furnace preheating zone annulus angle and affect the reduction effect of reducing zone material
Really, so controlling preheating zone annulus angle to be not more than 100 °.
According to embodiment of the present utility model, described drying tube is located at described rotatable ring-shaped furnace bottom 1/3 spacing, institute
Stating spacing is the distance between described rotatable ring-shaped furnace bottom and furnace roof, and the concrete number of described drying tube and burner and shape are not
It is restricted, as long as the effect of dry heat can be played, wherein, the shape of described drying tube can be p-shaped, W shape or U
Type, according to some embodiments of the present utility model, this utility model drying tube is preferably U-shaped, the concrete heating of described drying tube
Mode is unrestricted, and according to some embodiments of the present utility model, this utility model is preferably electrical heating, gas heating, high temperature
One or more of fume afterheat.
According to embodiment of the present utility model, described preheating zone furnace wall is provided with exhaust opening 5, and inner flue gas of the stove is from described smoke evacuation
Mouth is discharged, for preheated fuel gas combustion air and secondary wind.
According to embodiment of the present utility model, the concrete composition component of described furnace bottom support and drive system is unrestricted,
As long as the effect supporting and being driven can be played, the tricks of furnace bottom support described in the utility model and drive system is preferably
2-4 covers, and is separately positioned on the base of described rotatable ring-shaped furnace bottom bottom.
According to embodiment of the present utility model, the concrete species of the base of described rotatable ring-shaped furnace bottom is unrestricted, only
The effect of support can be played, according to some embodiments of the present utility model, the preferred base of this utility model be by
Two parallel cylinder row metal bodies are formed by being welded on the bottom of described rotatable ring-shaped furnace bottom.
According to embodiment of the present utility model, corresponding with described annular furnace wall in described rotatable ring-shaped furnace bottom lower surface
Excircle at, be provided with for furnace bottom sealing furnace bottom water sealed tank 17.
Embodiment 1：As shown in Figure 1, Figure 2 and Figure 3, a kind of monolayer for being reduced directly the mode of production heats and frequency modulation type
Rotary hearth furnace, a diameter of 40m-60m of this rotary hearth furnace；During work, material passes through the frequency modulation type vibration material distributor of rotary hearth furnace charging zone 1
Material is uniformly arranged in rotary furnace bottom by 10 forms material bed 18, by setting up frequency modulator in material distributing machine, when material
Flow is correspondingly formed FM signal, adjusts material feedback letter number by controlling frequency modulator, reaches the effect of control material flow, leads to
Cross furnace bottom drive system 20 drive furnace bottom rotate, material pre- furnace bottom no relative motion, with furnace bottom rotation in burner hearth successively
Through preheating zone 2, reducing zone 3, by setting up drying tube preheating zone in stove, preheating zone annulus angle is 30 °, using electrical heating side
Formula, the temperature of heating is 800 DEG C -1000 DEG C table water that can effectively remove in stove material and water of crystallization and reduces carbon in material and burn
Damage；Reducing zone adopts outboard sidewalls heat-accumulating burner mode of heating, can reduce fuel using inferior or low-rank fuel
This, improve material reduction effect, and material is discharged by the discharging machine 14 through rotary hearth furnace discharge zone 4 for the reducing material generating after reduction
Rotary hearth furnace, inner flue gas of the stove is discharged from exhaust opening 5, and the gas-fired combustion-supporting wind needed for rotary hearth furnace and secondary wind are entered by fume afterheat recycling
Row preheating, the gas-fired combustion-supporting wind after preheating and secondary wind are connected to the heater of rotary hearth furnace by pipeline.
Embodiment 2：As shown in Figure 1, Figure 2 and Figure 3, a kind of monolayer for being reduced directly the mode of production heats and frequency modulation
Formula rotary hearth furnace, a diameter of 40m-60m of this rotary hearth furnace, during work, material vibrates cloth by the frequency modulation type of rotary hearth furnace charging zone 1
Material is uniformly arranged in rotary furnace bottom and forms material bed 18 by machine 10, by setting up frequency modulator in material distributing machine, works as material
Flow be correspondingly formed FM signal, by control frequency modulator adjust material feedback letter number, reach the effect of control material flow,
By furnace bottom drive system 20 drive furnace bottom rotate, material pre- furnace bottom no relative motion, with furnace bottom rotation in burner hearth according to
Secondary through preheating zone 2, reducing zone 3, by setting up drying tube preheating zone in stove, preheating zone annulus angle is 60 °, using combustion gas combustion
Burn mode of heating, the temperature of heating is 600 DEG C -1000 DEG C table water that can effectively remove in stove material and water of crystallization and reduces thing
Carbon scaling loss in material；Reducing zone adopts outboard sidewalls heat-accumulating burner mode of heating, can be reduced using inferior or low-rank fuel
Fuel cost, improves material reduction effect, and the discharging machine 14 through rotary hearth furnace discharge zone 4 for the reducing material generating after reduction is by thing
Rotary hearth furnace discharged by material, and inner flue gas of the stove discharges from exhaust opening 5, and fume afterheat recycling is by the gas-fired combustion-supporting wind and two needed for rotary hearth furnace
Secondary wind is preheated, and the gas-fired combustion-supporting wind after preheating and secondary wind are connected to the heater of rotary hearth furnace by pipeline.
Embodiment 3：As shown in Figure 1, Figure 2 and Figure 3, a kind of monolayer for being reduced directly the mode of production heats and frequency modulation type
Rotary hearth furnace, a diameter of 40m-60m of this rotary hearth furnace；During work, material passes through the frequency modulation type vibration material distributor of rotary hearth furnace charging zone 1
Material is uniformly arranged in rotary furnace bottom by 10 forms material bed 18, by setting up frequency modulator in material distributing machine, when material
Flow is correspondingly formed FM signal, adjusts material feedback letter number by controlling frequency modulator, reaches the effect of control material flow, leads to
Cross furnace bottom drive system 20 drive furnace bottom rotate, material pre- furnace bottom no relative motion, with furnace bottom rotation in burner hearth successively
Through preheating zone 2, reducing zone 3, by setting up drying tube preheating zone in stove, preheating zone annulus angle is 100 °, using combustion gas combustion
Burn mode of heating, the temperature of heating is 400 DEG C -1000 DEG C table water that can effectively remove in stove material and water of crystallization and reduces thing
Carbon scaling loss in material；Reducing zone adopts outboard sidewalls heat-accumulating burner mode of heating, can be reduced using inferior or low-rank fuel
Fuel cost, improves material reduction effect, and the discharging machine 14 through rotary hearth furnace discharge zone 4 for the reducing material generating after reduction is by thing
Rotary hearth furnace discharged by material, and inner flue gas of the stove discharges from exhaust opening 5, and fume afterheat recycling is by the gas-fired combustion-supporting wind and two needed for rotary hearth furnace
Secondary wind is preheated, and the gas-fired combustion-supporting wind after preheating and secondary wind are connected to the heater of rotary hearth furnace by pipeline.
Inventor finds, according to this rotary hearth furnace of this utility model embodiment, with conventional rotary hearth furnace all using furnace wall side wall
The mode of burner heating is compared, and sets up drying tube preheating zone and set in preheating zone and reduction interval in rotary hearth furnace of the present utility model
Put partition wall, efficiently solve the problems, such as that material enters the stove initial stage because leading to powder burner to block more；And, this utility model can adopt
Wet block or wet bulb directly enter the flow processing raw material of rotary hearth furnace, shorten technological process, reduce equipment investment, production cost
And energy consumption；This utility model rotary hearth furnace can adopt regenerative combustion technology simultaneously, can be using inferior or low-rank fuel, fall
Low fuel cost, can at home and lack the area popularization of natural gas and high-grade fuel；Additionally, by setting up in material distributing machine
Frequency modulator, when the flow of material is correspondingly formed FM signal, adjusts material feedback letter number by controlling frequency modulator, reaches control thing
The effect of stream amount, automatically controls and adjusts technological process, cost savings manpower and materials, reaches the effect of auto-control
Really.
It is to be understood that term " first ", " second " are only used for describing purpose in description of the present utility model, and
It is not intended that instruction or hint relative importance or the implicit quantity indicating indicated technical characteristic.Thus, define
The feature of " first ", " second " can be expressed or implicitly include one or more this feature.
In this utility model, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection ", " Gu
Fixed " etc. term should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected or integral；Can be
It is mechanically connected or electrically connect；Can be to be joined directly together it is also possible to be indirectly connected to by intermediary, can be two
The connection of element internal or the interaction relationship of two elements.For the ordinary skill in the art, can basis
Concrete condition understands concrete meaning in this utility model for the above-mentioned term.
In this utility model, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score
Can be the first and second feature directly contacts, or the first and second features pass through intermediary mediate contact.And, first is special
Levy second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or only
Represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " permissible
Be fisrt feature immediately below second feature or obliquely downward, or be merely representative of fisrt feature level height and be less than second feature.
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy describing with reference to this embodiment or example
Point is contained at least one embodiment of the present utility model or example.In this manual, the schematic table to above-mentioned term
State that be not necessarily referring to is identical embodiment or example.And, the specific features of description, structure, material or feature can be
Combine in an appropriate manner in any one or more embodiments or example.Additionally, in the case of not conflicting, this area
The feature of the different embodiments described in this specification or example and different embodiment or example can be carried out by technical staff
In conjunction with and combination.
Although of the present utility model embodiment has been shown and described above it is to be understood that above-described embodiment is
Exemplary it is impossible to be interpreted as that those of ordinary skill in the art is in scope of the present utility model to restriction of the present utility model
Interior above-described embodiment can be changed, change, replacing and modification, simultaneously for one of ordinary skill in the art, foundation
The thought of the application, all will change in specific embodiments and applications.
Claims (7)
1. a kind of monolayer for being reduced directly the mode of production heats and frequency modulation type rotary hearth furnace is it is characterised in that include annular furnace
Body, rotatable ring-shaped furnace bottom, heat power engineering system and furnace bottom support and drive system；Wherein：
Described annular body of heater includes：Annular furnace, frequency modulation type vibration material distributor and discharging machine, described annular furnace is by annular furnace
Wall, furnace roof, preheating zone and reducing zone division wall and discharge end barricade are constituted, and form feed zone adjacent successively, preheating zone, reduction
Area and discharge zone, wherein, described partition wall is located between described preheating zone and described reducing zone, and described discharge end barricade is located at described
Between reducing zone and described discharge zone, described partition wall and described barricade are extended downwardly by the roof of described rotary hearth furnace, and with described
Rotatable ring-shaped furnace bottom keeps certain intervals；The two ends of described annular furnace are provided with the independent frequency modulation type vibration cloth for charging
Material machine and the discharging machine for discharging, wherein, described frequency modulation type vibration material distributor includes material distributing machine main body, vibrating spring, vibration
Motor, frequency modulator switchs；
Described heat power engineering system includes：Multiple drying tubes and multiple burner, wherein, described drying tube is arranged on the position of described preheating zone
On the furnace wall side wall between described rotatable ring-shaped furnace bottom and furnace roof, add for pipe mode is dried to described preheating zone
Heat, described burner is arranged on the furnace wall side wall of described reducing zone, for described reducing zone is carried out with burner mode heating；
Described furnace bottom support and drive system be arranged on described preheating zone and described reducing zone positioned at described rotatable annular furnace
On the base of bottom.
2. rotary hearth furnace according to claim 1 is it is characterised in that described preheating zone heating-up temperature is 400 DEG C -1000 DEG C.
3. rotary hearth furnace according to claim 1 is it is characterised in that the horizontal cross-section of described rotary hearth furnace is annular, described
Preheating zone annulus angle is 30 ° -100 °.
4. rotary hearth furnace according to claim 1 is it is characterised in that described feed zone, preheating zone, reducing zone and discharge zone edge
The rotation direction of described rotatable ring-shaped furnace bottom is arranged in order.
5. rotary hearth furnace according to claim 1 is it is characterised in that described drying tube is located at away from described rotatable ring-shaped furnace bottom
At 1/3 spacing, described spacing is the distance between described rotatable ring-shaped furnace bottom and furnace roof.
6. rotary hearth furnace according to claim 1 is it is characterised in that described preheating zone furnace wall is provided with exhaust opening, cigarette in stove
Gas is discharged from described exhaust opening, for preheated fuel gas combustion air and secondary wind.
7. rotary hearth furnace according to claim 1 it is characterised in that described rotatable ring-shaped furnace bottom lower surface with described
At the corresponding excircle of annular furnace wall, it is provided with the furnace bottom water sealed tank for furnace bottom sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN106222352A (en) * | 2016-09-13 | 2016-12-14 | 江苏省冶金设计院有限公司 | A kind of monolayer for being reduced directly the mode of production heats and frequency modulation type rotary hearth furnace |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106222352A (en) * | 2016-09-13 | 2016-12-14 | 江苏省冶金设计院有限公司 | A kind of monolayer for being reduced directly the mode of production heats and frequency modulation type rotary hearth furnace |
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