CN208818016U - Electric arc furnaces afterheat utilizing system - Google Patents
Electric arc furnaces afterheat utilizing system Download PDFInfo
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- CN208818016U CN208818016U CN201821367912.2U CN201821367912U CN208818016U CN 208818016 U CN208818016 U CN 208818016U CN 201821367912 U CN201821367912 U CN 201821367912U CN 208818016 U CN208818016 U CN 208818016U
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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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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
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Abstract
The utility model relates to a kind of electric arc furnaces afterheat utilizing systems, including combustion settling chamber, waste heat boiler and drum, combustion settling chamber passes through gasification cooling flue respectively and connect with electric arc furnaces and waste heat boiler, two gasification cooling flues are equipped with the first water inlet and the first moisture outlet, each first water inlet is connected to the water outlet of drum, each first moisture outlet is connected to the moisture ingress of drum, and the steam (vapor) outlet of drum and the steam (vapor) outlet of waste heat boiler are connected to steam utilization unit.By arranging combustion settling chamber between electric arc furnaces and waste heat boiler, while making smoke combustion to guarantee system operational safety, two gasification cooling flues are vaporized cooling and generate high steam to flue gas, the sufficiently heat of recycling high-temperature flue gas, flue-gas temperature may make to be reduced to the range suitable for waste heat boiler operation simultaneously, again by waste heat boiler Mist heat recovering, the effective use to electric arc furnace flue gas exhaust heat is realized, it is energy-saving.
Description
Technical field
The utility model belongs to EAF steelmaking technology field, and in particular to a kind of electric arc furnaces afterheat utilizing system.
Background technique
It is raw material alloy smelting steel that electric arc furnaces, which generally uses steel scrap, and a large amount of cigarette can be generated during electric arc furnace smelting
Gas, the temperature of these flue gases is up to 1300 DEG C, and according to pertinent literature, high-temperature flue gas has taken away entire electric arc furnaces input heat
21%, it is huge waste for the energy system of electric arc furnace smelting if directly emptied these high-temperature flue gas.Simultaneously
Electric arc furnace body is fabricated using steel, and ontology is needing to contain high-temperature molten steel, also to receive the radiation of high-temperature electric arc, so
Electric arc furnace body and bell all use recirculated water to be cooled down, and 25 DEG C of inflow temperature, 33 DEG C of leaving water temperature, recirculated cooling water incite somebody to action this
The high temperature high-quality heat energy conversion of body is for the low-quality thermal energy of the low temperature not being available, relative to the increasingly energy in short supply at present,
This is also huge waste.
Utility model content
The utility model embodiment is related to a kind of electric arc furnaces afterheat utilizing system, and the part that can at least solve the prior art lacks
It falls into.
The utility model embodiment is related to a kind of electric arc furnaces afterheat utilizing system, including combustion settling chamber, waste heat boiler and
Drum, the combustion settling chamber pass through gasification cooling flue respectively and connect with electric arc furnaces and the waste heat boiler, two vaporizations
Cooling stack is equipped with the first water inlet and the first moisture outlet, and each first water inlet connects with the water outlet of the drum
Logical, each first moisture outlet is connected to the moisture ingress of the drum, the steam (vapor) outlet of the drum and the waste heat
The steam (vapor) outlet of boiler is connected to steam utilization unit.
As one of embodiment, the combustion settling chamber is equipped with the second water inlet and the second moisture outlet, and described second enters
The mouth of a river is connected to the water outlet of the drum, and second moisture outlet is connected to the moisture ingress of the drum.
As one of embodiment, electric arc furnaces afterheat utilizing system further includes oxygen-eliminating device, the water outlet difference of the oxygen-eliminating device
It is connected to the admission port of the water supplement port of the drum and the waste heat boiler.
As one of embodiment, the bell of the electric arc furnaces is equipped with third water inlet and third moisture outlet, described to remove
The water outlet of oxygen device is also connected to the third water inlet, and the moisture ingress of the third moisture outlet and the oxygen-eliminating device connects
It is logical.
As one of embodiment, the bell includes bell ontology and the bell bend pipe that is connected on the bell ontology,
The bell bend pipe is connect by the corresponding gasification cooling flue with the combustion settling chamber, the third water inlet and institute
It states third moisture outlet to be all set on the bell ontology, the circulating water channel in the bell initiates from the third and enters water
It re-extends after bell bend pipe described in mouth and pile warp to the third moisture outlet.
As one of embodiment, the furnace body of the electric arc furnaces is equipped with the 4th water inlet and the 4th moisture outlet, described to remove
The water outlet of oxygen device is also connected to the 4th water inlet, and the moisture ingress of the 4th moisture outlet and the oxygen-eliminating device connects
It is logical.
As one of embodiment, the steam utilization unit includes steam turbine, and the air exit of the steam turbine passes through row
Feed channel is connected to the circulation water inlet of the oxygen-eliminating device, is disposed with condenser and heater on Yu Suoshu exhaust pipe.
As one of embodiment, the steam utilization unit includes steam accumulator, the steam (vapor) outlet of the drum and institute
The steam (vapor) outlet for stating waste heat boiler is connected to the steam inlet of the steam accumulator.
The utility model embodiment at least has the following beneficial effects:
Electric arc furnaces afterheat utilizing system provided by the utility model is burnt by arranging between electric arc furnaces and waste heat boiler
Expansion chamber, while making smoke combustion to guarantee system operational safety, two gasification cooling flues are vaporized cooling to flue gas
And high steam is generated, the heat of high-temperature flue gas is sufficiently recycled, while may make flue-gas temperature is reduced to transport suitable for waste heat boiler
Capable range, then by waste heat boiler Mist heat recovering, realize the effective use to electric arc furnace flue gas exhaust heat, energy conservation drop
Consumption.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is the structural schematic diagram of electric arc furnaces afterheat utilizing system provided by the embodiment of the utility model.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
All other embodiment obtained, fall within the protection scope of the utility model.
Such as Fig. 1, the utility model embodiment provides a kind of electric arc furnaces afterheat utilizing system, including combustion settling chamber 3, waste heat
Boiler 4 and drum 6, the combustion settling chamber 3 are connect by gasification cooling flue 5 with electric arc furnaces and the waste heat boiler 4 respectively,
Two gasification cooling flues 5 are equipped with the first water inlet and the first moisture outlet, each first water inlet with the vapour
The water outlet connection of packet 6, each first moisture outlet are connected to the moisture ingress of the drum 6, the steam of the drum 6
The steam (vapor) outlet of outlet and the waste heat boiler 4 is connected to steam utilization unit.
The above-mentioned generally included boiler drum of waste heat boiler 4, the steam (vapor) outlet of above-mentioned waste heat boiler 4 are set to the boiler drum
On.
Above-mentioned steam utilization unit can be steam pipe network or steam user, preferably, such as Fig. 1, each section steam is advanced
Enter storage in steam accumulator 7, provides steam the i.e. described steam utilization for steam pipe network or steam user by steam accumulator 7
Unit includes steam accumulator 7, the steam (vapor) outlet of the steam (vapor) outlet of the drum 6 and the waste heat boiler 4 with the steam
The steam inlet of storage heater 7 is connected to.
It is disposed with burner on above-mentioned combustion settling chamber 3, in the combustion settling chamber 3, flue gas can further burn, will
After-flame therein, avoids follow-up process from exploding, and guarantees system operational safety, and expansion chamber also can remove bulky grain flue dust, drop
The work load of low subsequent deduster；Combustion settling chamber 3 is this field conventional equipment, and specific structure does not repeat herein.Into
Preferably, such as Fig. 1, the combustion settling chamber 3 is equipped with the second water inlet and the second moisture outlet to one step, second water inlet with
The water outlet of the drum 6 is connected to, and second moisture outlet is connected to the moisture ingress of the drum 6.
Wherein it is preferred to 6 water outlet of drum is connected with high-pressure circulation pump 10 such as Fig. 1, the high-pressure circulation pump 10 outlet point
It is not connected to above-mentioned two first water inlet and above-mentioned second water inlet.
Above-mentioned two gasification cooling flue 5, combustion settling chamber 3 and drum 6 constitute an independent high pressure steam/water circulating
System belongs to high-pressure vaporization cooling system, can generate vapour in two gasification cooling flues 5 and in the wall body of combustion settling chamber 3
Aqueous mixtures, steam water interface enter in drum 6, and the steam of the steam-water separation in drum 6, generation enters steam utilization unit,
The water of generation then enters back into two gasification cooling flues 5 and in the wall body of combustion settling chamber 3.In the present embodiment, the high pressure vapour
The operating pressure of water circulation system is in 2.45MPa or so.
Electric arc furnaces afterheat utilizing system provided in this embodiment is burnt by arranging between electric arc furnaces and waste heat boiler 4
Expansion chamber 3, while making smoke combustion to guarantee system operational safety, two gasification cooling flues 5 are vaporized flue gas cold
But and high steam is generated, sufficiently recycles the heat of high-temperature flue gas, while flue-gas temperature may make to be reduced to suitable for waste heat boiler 4
The range of operation, then by 4 Mist heat recovering of waste heat boiler (about at 800 DEG C or less), realize to electric arc furnace flue gas exhaust heat
Effective use, it is energy-saving.
It is further preferred that above-mentioned electric arc furnaces afterheat utilizing system further includes oxygen-eliminating device 8, the oxygen-eliminating device 8 such as Fig. 1
Water outlet is connected to the admission port of the water supplement port of the drum 6 and the waste heat boiler 4 respectively, is given respectively by the oxygen-eliminating device 8
Drum 6 and waste heat boiler 4 supply deaerated feedwater.Preferably, the oxygen-eliminating device 8 respectively by the water supplement port of feed pump 9 and drum 6 and
The admission port of waste heat boiler 4 is connected to.
As optional embodiment, above-mentioned steam utilization unit includes steam turbine, and the air exit of the steam turbine passes through
Exhaust pipe is connected to the circulation water inlet of the oxygen-eliminating device 8, is disposed with condenser and heater on Yu Suoshu exhaust pipe, on
In the steam for stating the acquisition of electric arc furnaces afterheat utilizing system, at least partly send to steam turbine and generate electricity, the exhaust that steam turbine generates
The recycling after feeding 8 deoxygenation of oxygen-eliminating device after condenser condenses generation condensed water, the heated device of condensed water of generation heats.
In a further embodiment, such as Fig. 1, it is preferable that the bell 2 of the electric arc furnaces is equipped with third water inlet and third
Moisture outlet, the water outlet of the oxygen-eliminating device 8 are also connected to the third water inlet, the third moisture outlet and the deoxygenation
The moisture ingress of device 8 is connected to.
It is further preferred that the furnace body 1 of the electric arc furnaces is equipped with the 4th water inlet and the 4th moisture outlet, institute such as Fig. 1
The water outlet for stating oxygen-eliminating device 8 is also connected to the 4th water inlet, and the steam of the 4th moisture outlet and the oxygen-eliminating device 8 enters
Mouth connection.
It is to be appreciated that being usually that circulating water channel is arranged on furnace body 1 and bell 2, pass through recirculated water and furnace body 1 and furnace
The metal direct contact heat transfer of lid 2 is vaporized cooling.It is further preferred that such as Fig. 1, the bell 2 include 2 ontology of bell and
The bell bend pipe being connected on 2 ontology of bell, the bell bend pipe by the corresponding gasification cooling flue 5 with it is described
Combustion settling chamber 3 connects, and the third water inlet and the third moisture outlet are all set on 2 ontology of bell, described
Circulating water channel in bell 2 re-extends after initiating from bell bend pipe described in the third water inlet and pile warp to the third water
Vapor outlet.Wherein, if the electrode arranged off-centre of electric arc furnaces, above-mentioned third moisture outlet is preferably arranged on one close to electrode
Side, third water inlet are then oppositely disposed at the side far from electrode, the temperature of outlet vapor can be improved.
Wherein it is preferred to which above-mentioned third water inlet and the 4th water inlet pass through low pressure recycle pump 11 and oxygen-eliminating device 8 such as Fig. 1
Water outlet connection.Electric arc furnace body, bell 2 and oxygen-eliminating device 8 constitute a relatively independent low pressure recycle system, are suitable for low pressure
Evaporated cooling system: when having contained steel scrap in furnace body 1 or molten iron is smelted, electrode insertion furnace body 1 simultaneously launches high-temperature electric
Arc heating steel scrap or molten iron generate high-temperature flue gas simultaneously, and high-temperature flue gas is overflowed from bell bend pipe, and the heat of electric arc can also add simultaneously
Hot stove body 1 and bell 2, supplement water in oxygen-eliminating device 8 is by 11 feeding furnace bodies 1 of low pressure recycle pump and bell 2 and being heated to
150~170 DEG C (in the present embodiment, about at 158 DEG C), while the temperature of furnace body 1 and bell 2 is reduced, make furnace body 1 and bell 2
Temperature be maintained at 200 DEG C or so, to maintain its metal use intensity, keep its high-temperature electric arc scorch it is lower can work normally；
The supplement water vapor being heated, and returning in oxygen-eliminating device 8 can heat the water at low temperature that enters in oxygen-eliminating device 8 to deoxygenation temperature.This reality
It applies in example, the operating pressure of the low-pressure gasifying cooling system is within the scope of 0.3~0.4MPa, the low-pressure steam of 0.3~0.4MPa
Deoxygenation preferably can be carried out to the water in oxygen-eliminating device 8.
As it can be seen that electric arc furnaces afterheat utilizing system provided in this embodiment, can be recycled the heat of electric arc furnace body 1 and bell 2,
Not only the energy has been saved, but also has reduced the temperature of furnace body 1 and bell 2, to maintain its metal use intensity, has kept it in high-temperature electric arc
It scorches lower energy to work normally, effectively improves the service life of electric arc furnaces.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model
Protection scope within.
Claims (8)
1. a kind of electric arc furnaces afterheat utilizing system, it is characterised in that: including combustion settling chamber, waste heat boiler and drum, the combustion
Burning expansion chamber passes through gasification cooling flue respectively and connect with electric arc furnaces and the waste heat boiler, and two gasification cooling flues are all provided with
There are the first water inlet and the first moisture outlet, each first water inlet is connected to the water outlet of the drum, and each described
One moisture outlet is connected to the moisture ingress of the drum, and the steam of the steam (vapor) outlet of the drum and the waste heat boiler goes out
Mouth is connected to steam utilization unit.
2. electric arc furnaces afterheat utilizing system as described in claim 1, it is characterised in that: the combustion settling chamber is equipped with second and enters
The mouth of a river and the second moisture outlet, second water inlet are connected to the water outlet of the drum, second moisture outlet and institute
State the moisture ingress connection of drum.
3. electric arc furnaces afterheat utilizing system as claimed in claim 1 or 2, it is characterised in that: it further include oxygen-eliminating device, the deoxygenation
The water outlet of device is connected to the admission port of the water supplement port of the drum and the waste heat boiler respectively.
4. electric arc furnaces afterheat utilizing system as claimed in claim 3, it is characterised in that: the bell of the electric arc furnaces is equipped with the
Three water inlets and third moisture outlet, the water outlet of the oxygen-eliminating device are also connected to the third water inlet, the third steam
Outlet is connected to the moisture ingress of the oxygen-eliminating device.
5. electric arc furnaces afterheat utilizing system as claimed in claim 4, it is characterised in that: the bell includes bell ontology and company
The bell bend pipe being connected on the bell ontology, the bell bend pipe pass through the corresponding gasification cooling flue and the burning
Expansion chamber connection, the third water inlet and the third moisture outlet are all set on the bell ontology, in the bell
Circulating water channel initiate from bell bend pipe described in the third water inlet and pile warp after re-extend to the third moisture outlet.
6. electric arc furnaces afterheat utilizing system as claimed in claim 3, it is characterised in that: the furnace body of the electric arc furnaces is equipped with the
Four water inlets and the 4th moisture outlet, the water outlet of the oxygen-eliminating device are also connected to the 4th water inlet, the 4th steam
Outlet is connected to the moisture ingress of the oxygen-eliminating device.
7. electric arc furnaces afterheat utilizing system as claimed in claim 3, it is characterised in that: the steam utilization unit includes steamer
The air exit of machine, the steam turbine is connected to by exhaust pipe with the circulation water inlet of the oxygen-eliminating device, Yu Suoshu exhaust pipe
Condenser and heater are disposed on road.
8. electric arc furnaces afterheat utilizing system as described in claim 1, it is characterised in that: the steam utilization unit includes steam
Steam inlet of the steam (vapor) outlet of storage heater, the steam (vapor) outlet of the drum and the waste heat boiler with the steam accumulator
Connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821367912.2U CN208818016U (en) | 2018-08-23 | 2018-08-23 | Electric arc furnaces afterheat utilizing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821367912.2U CN208818016U (en) | 2018-08-23 | 2018-08-23 | Electric arc furnaces afterheat utilizing system |
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| Publication Number | Publication Date |
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| CN208818016U true CN208818016U (en) | 2019-05-03 |
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ID=66274409
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| CN201821367912.2U Active CN208818016U (en) | 2018-08-23 | 2018-08-23 | Electric arc furnaces afterheat utilizing system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113804006A (en) * | 2021-09-17 | 2021-12-17 | 华泰永创(北京)科技股份有限公司 | Coke oven flue waste heat recovery system |
-
2018
- 2018-08-23 CN CN201821367912.2U patent/CN208818016U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113804006A (en) * | 2021-09-17 | 2021-12-17 | 华泰永创(北京)科技股份有限公司 | Coke oven flue waste heat recovery system |
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