CN206384845U - Rotary hearth furnace - Google Patents
Rotary hearth furnace Download PDFInfo
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- CN206384845U CN206384845U CN201621431103.4U CN201621431103U CN206384845U CN 206384845 U CN206384845 U CN 206384845U CN 201621431103 U CN201621431103 U CN 201621431103U CN 206384845 U CN206384845 U CN 206384845U
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- rotary hearth
- radiant tube
- hearth furnace
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Abstract
The utility model discloses rotary hearth furnace.The rotary hearth furnace includes：Annular body of heater；Rotatable circular furnace bottom, the ring-shaped furnace bottom is arranged on annular lower portion of furnace body, and positioned between the madial wall and the lateral wall, and separate setting charge section, conversion zone and discharging section successively using partition wall along the ring-shaped furnace bottom direction of rotation, wherein, the charge section is provided with feed pieces, and the conversion zone is provided with flue outlet, and the discharging section is provided with outlet member；Multiple burners, the multiple burner is circumferentially disposed at the conversion zone；Multiple radiant tubes, the multiple radiant tube is circumferentially disposed at the conversion zone.By setting radiant tube, reduction reaction and oxidation reaction are clearly divided, ensure heat energy efficiently using and reduction reaction and oxidation reaction each on the premise of required atmosphere, reduction reaction and oxidation reaction is each smoothed out.
Description
Technical field
The utility model is related to rotary hearth furnace.
Background technology
Existing rotary hearth furnace is mainly used to handle ferrous material, and there is presently no handle phosphorus ore with rotary hearth furnace to prepare phosphoric acid
Technique occurs.
Current industrialized production phosphoric acid main method has thermal phosphoric acid, phosphoric acid by wet process and kiln-process phosphoric acid.The life of thermal phosphoric acid
What production method was generally used both at home and abroad now is electric furnace two-step method, and this method is to pass through the distillation phosphorus obtained by electric furnace reduction phosphorus ore
Phosphorus cooling is in a liquid state after dedusting, phosphoric acid then is made through burning, aquation, demisting in liquid phosphorus.The main equipment of this method is
In electric furnace, production process, electric furnace converts electrical energy into heat energy in the form of raw material resistance and motor electric arc, makes material melts, disappears
Substantial amounts of electric energy is consumed, this method belongs to high energy consumption, the production method of high cost.Wet production is to use inorganic acid decomposing phosphate rock
Powder, isolates raw phosphoric acid, then purified rear obtained phosphoric acid product.Phosphoric acid by wet process method of specific heat phosphoric acid cost is low by 20%~30%, place
In the leading position of phosphoric acid production.But the phosphoric acid purity of wet production is not high, and there is in terms of environmental protection problem.Given birth to using the method
Atmospheric environment and underground water of the phosphogypsum slag to periphery of discharge, surface water is produced to pollute.Kiln-process phosphoric acid processing main body is set
Standby is rotary kiln, is comprised the concrete steps that：Add bentonite that carbon pelletizing is made rock phosphate in powder, silica, carbonaceous reducing agent, enter in rotary kiln
Row reduction reaction and oxidation reaction.Discharge the gaseous state P of kiln body2O5Generated after hydration after phosphoric acid, cyclic absorption into concentrated phosphoric acid.With
Electric furnace process phosphoric acid is compared, and kiln-process phosphoric acid energy consumption is substantially reduced, but still suffers from problems with：First, there are problems that kiln body ring formation；2nd,
Kiln internal oxidition band and zone of reduction are difficult to well-separated, influence reduction reaction and oxidation reaction effect, the rate of recovery of final influence phosphorus
And product quality；3rd, high is required to balling technique.Because oxidation reaction is carried out with reduction reaction in same equipment, need
Material pelletizing surface is covered into integument, the ball making process controls difficulty very big in process of production, be difficult to realize.
In addition, with the reduction of high-grade phosphorus ore, in, the utilization of low-grade phosphate ore it is of increasing concern.How one is explored
Bar resource wide adaptation range and the phosphorus ore processing system that energy consumption is low, cost is low, pollution is small, as urgent problem to be solved.
Utility model content
The utility model is intended at least solve one of technical problem present in prior art.Therefore, of the present utility model
One purpose is to propose a kind of rotary hearth furnace, by setting radiant tube, and reduction reaction and oxidation reaction are clearly divided,
On the premise of ensureing that heat energy is efficiently utilized, reduction reaction and oxidation reaction is set each to be smoothed out, so as to ensure product quality.
According to one side of the present utility model, the utility model provides a kind of rotary hearth furnace.According to of the present utility model
Embodiment, the rotary hearth furnace includes：
Annular body of heater, the annular body of heater has madial wall, lateral wall and roof, and the annular body of heater limits ring-type stove
Thorax；
Rotatable circular furnace bottom, the ring-shaped furnace bottom is arranged on annular lower portion of furnace body, and is located at the madial wall and described
Between lateral wall, and separate setting charge section, conversion zone and discharging section successively using partition wall along the ring-shaped furnace bottom direction of rotation,
Wherein, the charge section is provided with feed pieces, and the conversion zone is provided with flue outlet, and the discharging section is provided with discharging portion
Part；
Multiple burners, the multiple burner is circumferentially disposed at the conversion zone；
Multiple radiant tubes, the multiple radiant tube is circumferentially disposed at the conversion zone, is each that radiant tube is respectively provided with spoke
Penetrate pipe gas access, radiant tube air conduit interface and radiant tube gas vent, the radiant tube gas access and the reaction
The flue outlet of section is connected.
According to the rotary hearth furnace of the utility model embodiment, by setting radiant tube, reduction reaction and oxidation reaction are carried out
Clearly divide, ensure heat energy efficiently using and reduction reaction and oxidation reaction each on the premise of required atmosphere, make reduction anti-
Answer and oxidation reaction is each smoothed out, so as to ensure product quality.And by by oxidation reaction liberated heat by radiating
Pipe is transferred to rotary furnace bottom, and the reduction process of supply phosphorus ore is used, and making the energy consumption of rotary hearth furnace significantly reduces, and energy utilization rate shows
Write and improve.
Optionally, the rotary hearth furnace further comprises：Transmission device, the transmission device is arranged on below the ring-shaped furnace bottom
And be connected with the ring-shaped furnace bottom.
Optionally, the radiant tube is located at the top of the ring-shaped furnace bottom, and the radiant tube height be not higher than it is described
The height of burner.
Optionally, the radiant tube is not higher than 80 centimeters positioned at the top of the ring-shaped furnace bottom.
Optionally, the radiant tube and the burner are in be spaced apart.
Optionally, the radiant tube is shaped as U-shaped, W types or linear pattern.
Optionally, the burner turns ring-shaped furnace bottom parallel to described.
Optionally, the flue outlet of the rotary hearth furnace is adjacent to the outlet member.
Optionally, the rotary hearth furnace further comprises：Heat-resisting pipeline, the heat-resisting pipeline and the radiant tube gas access and
The flue outlet of the rotary hearth furnace is connected.
Optionally, the circular arc angle of the conversion zone is not less than 220 °.
Additional aspect and advantage of the present utility model will be set forth in part in the description, partly by from following description
In become obvious, or by it is of the present utility model practice recognize.
Brief description of the drawings
Of the present utility model above-mentioned and/or additional aspect and advantage will from description of the accompanying drawings below to embodiment is combined
Become substantially and be readily appreciated that, wherein：
Fig. 1 shows the structural representation of the rotary hearth furnace according to the utility model one embodiment；
Fig. 2 shows the overlooking the structure diagram of the rotary hearth furnace according to the utility model one embodiment.
Embodiment
Embodiment of the present utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning
Same or similar element or element with same or like function are represented to same or similar label eventually.Below by ginseng
The embodiment for examining accompanying drawing description is exemplary, is only used for explaining the utility model, and it is not intended that to of the present utility model
Limitation.
In description of the present utility model, term " longitudinal direction ", " transverse direction ", " on ", " under ", "front", "rear", "left", "right",
The orientation or position relationship of the instruction such as " vertical ", " level ", " top ", " bottom " be based on orientation shown in the drawings or position relationship,
It is for only for ease of description the utility model rather than requires that the utility model must be with specific azimuth configuration and operation, therefore
It is not intended that to limitation of the present utility model.
It should be noted that term " first ", " second " are only used for describing purpose, and it is not intended that indicating or implying phase
To importance or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be with
Express or implicitly include one or more this feature.Further, in description of the present utility model, unless otherwise
Illustrate, " multiple " are meant that two or more.
According to one side of the present utility model, the utility model provides a kind of rotary hearth furnace.With reference to Fig. 1, according to this reality
With new embodiment, the rotary hearth furnace is explained, the rotary hearth furnace includes：Annular body of heater 100, rotatable circular furnace bottom
200th, multiple burners 300 and multiple radiant tubes.
According to the rotary hearth furnace of the utility model embodiment mainly for the treatment of phosphorus ore to prepare phosphoric acid.The rotary hearth furnace is except place
Manage high-grade phosphorus ore, in can also handling, low-grade phosphate ore, adapt to completely the phosphate rock resource of China more than 90% belong in, low product
The resources characteristic of position phosphorus ore, possesses powerful vitality and good development prospect.
According to embodiment of the present utility model, compared with thermal phosphoric acid, the rotary hearth furnace of the utility model embodiment is fully sharp
With the reaction heat of oxidizing process, oxidation reaction liberated heat is transferred to rotary furnace bottom by radiant tube, phosphorus ore is supplied
Reduction process use, greatly reduce process energy consumption, improve energy utilization rate.Also, the reduction reaction of phosphorus and oxidation are anti-
It should be completed in same equipment, equipment investment be reduced, so as to reduce cost.The rotary hearth furnace is reduced using common coal dust
Agent, without the use of expensive coke, not only avoid the environmental pollution of the burnt process of system, and reduce production cost.
According to embodiment of the present utility model, compared with kiln-process phosphoric acid, the rotary hearth furnace of the utility model embodiment will be reduced
Reaction is well-separated by radiant tube with oxidation reaction, atmosphere needed for having ensured reduction reaction and oxidation reaction each, makes reaction
Each it is smoothed out, is carried out so as to ensure that production is high-quality, to ensure good technical indicator, also, the percent reduction of phosphorus is high, reaches
To more than 85%.In addition, kiln body ring formation problem is not present in the rotary hearth furnace of the utility model embodiment, make production direct motion.Moreover, should
The pelletizing manufacturing process that rotary hearth furnace is used is simple to operation, is not required to progress the secondary of pelletizing and wraps.Meanwhile, coal in course of reaction
Amount of allocating is substantially reduced.
According to embodiment of the present utility model, compared with phosphoric acid by wet process, the rotary hearth furnace of the utility model embodiment is not present
The environmental problem that ardealite discarded object is recycled, is also not required to product purification and impurity removal.
In order to make it easy to understand, each part of rotary hearth furnace is explained below：
Annular body of heater 100：According to embodiment of the present utility model, annular body of heater 100 has madial wall 110, lateral wall 120
With roof 130, the annular body of heater 100 limits annular hearth 140.
Rotatable circular furnace bottom 200：With reference to Fig. 1 and 2, according to embodiment of the present utility model, the ring-shaped furnace bottom 200 is set
In the annular bottom of body of heater 100, and it is located between madial wall 110 and lateral wall 120, and is utilized along the direction of rotation of ring-shaped furnace bottom 200
Partition wall 240 separates setting charge section 210, conversion zone 220 and discharging section 230 successively, wherein, charge section 210 is provided with feeder
Part 211, conversion zone 220 is provided with flue outlet 221, and discharging section 230 is provided with outlet member 231.Raw material is through feed pieces 211
Into feed zone 210, phosphorus ore is preheated by conversion zone, generation phosphorus steam and CO is reduced, and discharge a large amount of heat energy, reaction
Impurity residue is discharged by outlet member 231.According to embodiment of the present utility model, during rotary hearth furnace is run, conversion zone is also
Originality atmosphere.
According to embodiment of the present utility model, the setting of partition wall 240 can make conversion zone keep more preferable reducing atmosphere.
According to embodiment of the present utility model, the circular arc angle of conversion zone 220 is not less than 220 °, wherein, circular arc angle is
Refer to using the axle center of annular body of heater as the center of circle, the angle of the central angle corresponding to conversion zone.Thus, it can ensure that reduction reaction is fully entered
Go and burner and radiant tube have enough arrangement spaces, be conducive to oxidation reaction to carry out, improve reaction efficiency.
According to embodiment of the present utility model, flue outlet 221 is adjacent to discharging section 230.Thus, reaction efficiency is higher.
According to embodiment of the present utility model, the rotary hearth furnace further comprises：Transmission device 500, the transmission device 500 is set
Put below ring-shaped furnace bottom 200 and be connected with the ring-shaped furnace bottom 200, for driving ring-shaped furnace bottom to rotate.
According to embodiment of the present utility model, the rotary hearth furnace further comprises：Air duct 600, the air duct 600
In the outside of annular hearth 140, the air duct 140 is connected with radiant tube air conduit interface, and the air duct is used to turn
Bottom stove provides air source.
Multiple burners 300：According to embodiment of the present utility model, multiple burners 300 are circumferentially disposed at the conversion zone,
Burner 300 is used for the supplementary heating that burner mode is carried out to conversion zone 220.According to embodiment of the present utility model, in phosphorus ore also
The starting stage that original is reacted, it is reduction reaction heat supply, a large amount of heat transfers that reaction to be oxidized is released to reaction first to start burner 300
Duan Hou, closes a part of burner, during normal operation, rotary hearth furnace burner combustion is used as supplemental heat source.
According to embodiment of the present utility model, the burner 300 is parallel to ring-shaped furnace bottom 200.Thus, Fire Radiation is to furnace bottom
Heat it is more uniform.
Multiple radiant tubes 400：According to embodiment of the present utility model, the plurality of radiant tube 400 is circumferentially disposed at reaction
Section 220, each radiant tube 400 is respectively provided with radiant tube gas access, radiant tube air conduit interface and radiant tube gas vent, its
In, radiant tube gas access is connected with the flue outlet of the conversion zone, and radiant tube 400 is used to aoxidize phosphorus steam
The furnace gas containing phosphorus pentoxide is generated, and discharges a large amount of heat energy, heat energy passes through the material of the tube wall of radiant tube to conversion zone 220
Carry out radiant heating.It is oxidizing atmosphere during rotary hearth furnace is run, in radiant tube according to embodiment of the present utility model.
According to embodiment of the present utility model, radiant tube 400 is located at the top of ring-shaped furnace bottom 200, and the radiant tube 400
Highly it is not higher than the height of burner 300.Thus, the oxidation reaction heat release in radiant tube can be abundant by the reduction reaction of conversion zone
Utilize, heat utilization efficiency is high.
Further, according to embodiment of the present utility model, the top that the radiant tube 400 is located at ring-shaped furnace bottom 200 is not high
In 80 centimeters.Thus, what the oxidation reaction heat release in radiant tube can be utilized by the reduction reaction of conversion zone is more abundant, heat profit
It is higher with rate.
According to embodiment of the present utility model, radiant tube 400 and burner 300 are in be spaced apart.Thus, rotary hearth furnace is not only made
Heat supply is more uniformly distributed, and can reduce the supplemental heat source of burner mode as far as possible, is more saved.
According to embodiment of the present utility model, radiation tube shape is unrestricted, can be needed rationally to be selected according to production
Then.According to some embodiments of the present utility model, being shaped as radiant tube 400 is U-shaped, W types or linear pattern.
According to embodiment of the present utility model, the rotary hearth furnace further comprises：Heat-resisting pipeline (not shown), this is heat-resisting
Pipeline is connected with the flue outlet of radiant tube gas access and rotary hearth furnace.Because the furnace gas temperature of phosphorous steam and CO is higher, profit
Transmitted with heat-resisting pipeline, it is to avoid high-temperature damage transmission pipeline.
For the ease of understanding foregoing rotary hearth furnace, the rotary hearth furnace of the utility model embodiment is handled to the technological principle of phosphorus ore
Make following elaboration：Rotary hearth furnace processing phosphorus ore is that one kind uses carbonaceous pelletizing, and Phosphate Rock acid is reduced directly by rotary hearth furnace
New technology.The P that the thermal source of technique is produced by reaction4, CO oxidation heat liberations, rotary hearth furnace burner heating and carbonaceous pelletizing in small part
Carbon burning three provides, wherein, using oxidation reaction heat release as main heating source, the combustion of small part carbon in burner heating and carbonaceous pelletizing
Burning is used as complementarity thermal source.
After carbonaceous pelletizing is heated to reduction temperature, occur following reduction reactions in rotary hearth furnace conversion zone：
2Ca5(PO4)3F+15C+9SiO2→3/2P4+15CO+9(CaO·SiO2)+CaF2,
Δ H=28 006kJ/kg are (with P4Meter).(1)
The P that above-mentioned reaction is escaped4And CO, radiant tube is admitted to immediately occurs following oxidation reaction with air contact：
P4+5O2→2P2O5, Δ H=-25 498kJ/kg are (with P4Meter)；(2)
CO+1/2O2→CO2, Δ H=-22 154kJ/kg are (with P4Meter).(3)
Pass through reaction equation (1) (2) (3), for 1kg phosphorus, the product P of reduction reaction (1)4And CO, during oxidation
Liberated heat needs far beyond the heat absorption that Phosphate ore reduction reacts (1), and still has rich heat to be used for heating furnace charge, makes furnace charge
It is warming up to reaction temperature.Technical process of the present utility model be phosphorus ore, silica and coal three mix in proportion, ball processed, through drying
After be placed in rotary hearth furnace, the reduction of phosphorus and aoxidizing is completed in same equipment, i.e.,：At high operating temperatures, the phosphorus in phosphorus ore is turning
Bottom stove conversion zone is reduced by carbon, P4Escaped with vapor state.Produced P4Oxidation reaction (spoke is completed with CO feeding radiant tubes
Penetrate pipe connection air duct), carbonaceous pelletizing of institute's liberated heat by the radiant heat transfer of radiant tube to rotary furnace bottom is supplied
In phosphorus ore phosphorus heating and reduction reaction needed for.
In addition, by above-mentioned reaction principle, the phosphorus in phosphorus ore is to be reduced into phosphorus to escape in gaseous state, each in phosphorus ore
Plant impurity to stay in residue, therefore the more phosphorus ore of impurity content can be used.Again because will for phosphorus ore of the present utility model
Plus more silica (SiO2) to improve its fusing point, so (containing SiO to siliceous phosphorus ore2It is more) for, it contains P2O5As little as 10%
~25% phosphorus ore can be used.That is, the utility model is except processing high-grade phosphorus ore, in can also handling, low product
Position phosphorus ore., wherein it is desired to explanation, in, low-grade phosphate ore refer to P2O5Content is less than 25% phosphorus ore.
Below with reference to specific embodiment, the utility model is illustrated, it is necessary to which explanation is, these embodiments are only
It is illustrative, and it is not intended that to limitation of the present utility model.
Embodiment 1
Phosphoric acid is prepared using the rotary hearth furnace processing phosphorus ore of the utility model embodiment, specific method is as follows：By levigate to 200
The phosphorus ore that mesh accounts for more than 60% is well mixed and uses disc balling machine pelletizing according to a certain percentage with semi-coke, silica and binding agent,
Wherein P2O5Grade is 22%, and the addition of semi-coke is 1.1 times of theoretical requirement, the 11% of silica addition phosphorus ore weight, glue
Tie agent and choose sodium based raw material and bentonite, afterwards with drying grate under the conditions of 100-200 DEG C by obtained carbonaceous pelletizing dry to
Moisture is less than 1%, and dried carbonaceous pelletizing is distributed into rotary hearth furnace and is preheated, reduced, and rotary hearth furnace conversion zone keeps reproducibility gas
Atmosphere, 1300 DEG C of reduction temperature, rotary hearth furnace rotating speed is controlled in 40min/r, and conversion zone annulus angle is 320 DEG C.Obtained after reduction
Containing P4U-shaped radiant tube is sent into by rotary hearth furnace exhanst gas outlet with CO gaseous state thing, radiant tube connected with rotary hearth furnace air duct with
Ensure in pipe to be oxidizing atmosphere, the gas for sending into U-shaped radiant tube occurs oxidation reaction and discharges big calorimetric, and heat passes through U
Type pipe is the carbonaceous pelletizing radiant heating of furnace bottom, and the vertical range of U-tube and rotary hearth furnace ring-shaped furnace bottom is 60cm, to ensure radiation
The efficient utilization rate of heat transfer.The furnace gas for discharging the rotary hearth furnace of U-tube is directly entered hydrated tower, and P is absorbed by recycle acid2O5Work is made
Industry phosphoric acid, tail gas is emptied after electric cleaner.Feeding cement plant is secondary after the furnace charge of rotary hearth furnace discharge is collected utilizes.In conversion zone
In the reduction process of generation, the percent reduction of phosphorus reaches 86%.Wherein, the starting stage reacted in Phosphate ore reduction, first start all
Burner is reduction reaction heat supply, after a large amount of heat transfers to the conversion zone of reaction releasing to be oxidized, closes 2/3 burner, is normally transporting
Between the departure date, rotary hearth furnace burner combustion is used as supplemental heat source.
Embodiment 2
Phosphoric acid is prepared using the rotary hearth furnace processing phosphorus ore of the utility model embodiment, specific method is as follows：To be crushed to-
The phosphorus ore that 2mm accounts for more than 90% is well mixed and uses ball press pressure ball according to a certain percentage with lignite, silica and binding agent, wherein
P2O5Grade is 28%, and the addition of lignite is 1.3 times of theoretical requirement, the 3% of silica addition phosphorus ore weight, binding agent
Using liquid-containing binder, the pelletizing of compacting, which is dried to moisture~4%, to be distributed into rotary hearth furnace and is preheated, reduced, and controls conversion zone
Atmosphere is reducing atmosphere, and 1300 DEG C of reduction temperature, rotary hearth furnace rotating speed is controlled in 60min/r, and conversion zone annulus angle is 290
℃.What is obtained after reduction contains P4Pass through rotary hearth furnace exhanst gas outlet feeding W type radiant tubes, radiant tube and rotary hearth furnace with CO gaseous state thing
Air duct connection is to ensure for oxidizing atmosphere in pipe, and the gas of feeding radiant tube occurs oxidation reaction and discharged a large amount of
Heat, heat is by the carbonaceous pelletizing radiant heating that radiant tube is furnace bottom, and the vertical range of radiant tube and rotary hearth furnace ring-shaped furnace bottom is
30cm, to ensure the efficient utilization rate of radiant heat transfer.Phosphoric acid, tail gas warp are made after the furnace gas aquation for the rotary hearth furnace for discharging radiant tube
Emptied after dedusting.Feeding cement plant is secondary after the furnace charge of rotary hearth furnace discharge is collected utilizes.In the reduction process that conversion zone occurs,
The percent reduction of phosphorus reaches 90%.Wherein, the starting stage reacted in Phosphate ore reduction, first start whole burners and supplied for reduction reaction
After heat, a large amount of heat transfers to the conversion zone that reaction to be oxidized is released, the burner of half quantity is closed, during normal operation, is turned
Bottom stove burner combustion is used as supplemental heat source.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means to combine specific features, structure, material or the spy that the embodiment or example are described
Point is contained at least one embodiment of the present utility model or example.In this manual, to the schematic table of above-mentioned term
State and be not necessarily referring to identical embodiment or example.Moreover, specific features, structure, material or the feature of description can be
Combined in an appropriate manner in any one or more embodiments or example.
While there has been shown and described that embodiment of the present utility model, it will be understood by those skilled in the art that：
These embodiments can be carried out with a variety of changes, modification in the case where not departing from principle of the present utility model and objective, replaced
And modification, scope of the present utility model limits by claim and its equivalent.
Claims (10)
1. a kind of rotary hearth furnace, it is characterised in that including：
Annular body of heater, the annular body of heater has madial wall, lateral wall and roof, and the annular body of heater limits annular hearth；
Rotatable circular furnace bottom, the ring-shaped furnace bottom is arranged on annular lower portion of furnace body, and positioned at the madial wall and the outside
Between wall, and separate setting charge section, conversion zone and discharging section successively using partition wall along the ring-shaped furnace bottom direction of rotation, its
In, the charge section is provided with feed pieces, and the conversion zone is provided with flue outlet, and the discharging section is provided with discharging portion
Part；
Multiple burners, the multiple burner is circumferentially disposed at the conversion zone；
Multiple radiant tubes, the multiple radiant tube is circumferentially disposed at the conversion zone, is each that radiant tube is respectively provided with radiant tube
Gas access, radiant tube air conduit interface and radiant tube gas vent, the radiant tube gas access and the conversion zone
The flue outlet is connected.
2. rotary hearth furnace according to claim 1, it is characterised in that further comprise：
Transmission device, the transmission device is arranged on below the ring-shaped furnace bottom and is connected with the ring-shaped furnace bottom.
3. rotary hearth furnace according to claim 1, it is characterised in that the radiant tube is located at the top of the ring-shaped furnace bottom,
And the height of the radiant tube is not higher than the height of the burner.
4. rotary hearth furnace according to claim 3, it is characterised in that the radiant tube is located at the top of the ring-shaped furnace bottom not
Higher than 80 centimeters.
5. rotary hearth furnace according to claim 1, it is characterised in that the radiant tube and the burner are in be spaced apart.
6. rotary hearth furnace according to claim 1, it is characterised in that being shaped as the radiant tube is U-shaped, W types or linear pattern.
7. rotary hearth furnace according to claim 1, it is characterised in that the burner turns ring-shaped furnace bottom parallel to described.
8. rotary hearth furnace according to claim 1, it is characterised in that go out described in the flue outlet of the rotary hearth furnace is neighbouring
Expect part.
9. rotary hearth furnace according to claim 1, it is characterised in that further comprise：
Heat-resisting pipeline, the heat-resisting pipeline is connected with the flue outlet of the radiant tube gas access and the rotary hearth furnace.
10. the rotary hearth furnace according to claim any one of 1-9, it is characterised in that the circular arc angle of the conversion zone is not small
In 220 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201621431103.4U CN206384845U (en) | 2016-12-23 | 2016-12-23 | Rotary hearth furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621431103.4U CN206384845U (en) | 2016-12-23 | 2016-12-23 | Rotary hearth furnace |
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ID=59489698
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106698370A (en) * | 2016-12-23 | 2017-05-24 | 江苏省冶金设计院有限公司 | Rotary hearth furnace |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106698370A (en) * | 2016-12-23 | 2017-05-24 | 江苏省冶金设计院有限公司 | Rotary hearth furnace |
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