CN108413779A - A kind of split type, curved flue of mixed type electric furnace entrance - Google Patents
A kind of split type, curved flue of mixed type electric furnace entrance Download PDFInfo
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- CN108413779A CN108413779A CN201810458935.2A CN201810458935A CN108413779A CN 108413779 A CN108413779 A CN 108413779A CN 201810458935 A CN201810458935 A CN 201810458935A CN 108413779 A CN108413779 A CN 108413779A
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- flue
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/50—Feed-water heaters, i.e. economisers or like preheaters incorporating thermal de-aeration of feed-water
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/008—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
- F27D2017/006—Systems for reclaiming waste heat using a boiler
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The present invention provides a kind of split type, the curved flue of mixed type electric furnace entrance, belong to electric furnace waste heat recovery apparatus field, including the curved flue ontology of entrance, it is connected with dust-extraction unit on the curved flue ontology of entrance, the curved flue ontology of entrance includes top flue and underflue, top flue and underflue pass through flanged joint, it is connected with cooling water recirculation system on the lateral wall of top flue, lower part water-circulating pipe is connected on the lateral wall of underflue, the side of underflue is equipped with the first water plug and oxygen-eliminating device, lower part water inlet pipe is connected between lower part water-circulating pipe and the first water plug, lower part outlet pipe is connected between lower part water-circulating pipe and oxygen-eliminating device, the first water inlet pipe is connected between first water plug and oxygen-eliminating device；The present invention has the advantages that the stability that the replacement repair time is short, flue service life is long, maintenance cost is low, flue uses is good, electric furnace smelting yield is high, good dedusting effect and waste heat recovery are efficient.
Description
Technical field：
The invention belongs to electric furnace waste heat recovery apparatus fields, and in particular to one kind is split type, mixed type electric furnace entrance is curved
Flue.
Background technology：
The existing curved flue of electric furnace entrance is mostly the curved flue of monoblock type, and waste heat recovery is carried out using Vaporizing cooling method.
Former curved flue just starts leak in the state of electric furnace low yield, using leakage in three months, carries out large repairs within six months, just must within nine months
It must replace.It is high to replace primary expense cost, short time consumption is long.After electric furnace yield is promoted, curved flue leak is frequent, leakage point
Predominantly top flue, leakage cause are pipeline fatigue crack, are to cause weight to rhythm of production as caused by cooling effect difference
It is big to influence.
Former curved flue cooling water is vaporization cooling water, is provided by waste heat boiler oxygen-eliminating device, is designed as low pressure recycle water.And water
Road single loop needs twice up and down, and waterway circulating pipeline is longer.Circulating pump is located at ground, and flue peak has 16m, pump group to raise
50 meters of journey.Due to designing water route hypotony, recirculated water flow velocity is slow, causes curved flue windward side vaporization serious, inside pipeline
Powerful vapour lock is generated, to more exacerbate the low contradiction of recirculated water flow velocity.
Above-mentioned factor cause the curved flue of existing electric furnace entrance exist replace the repair time is long, flue service life is short,
Maintenance cost is high, flue uses stability is poor, it is poor low with waste heat recovery efficiency to hinder to promote electric furnace smelting yield, dust removing effects
The problem of.
Invention content：
The purpose of the present invention is providing a kind of split type, curved flue of mixed type electric furnace entrance in view of the above problems,
The repair time is short, flue service life is long, maintenance cost is low, cigarette with replacing for split type, the curved flue of mixed type electric furnace entrance
Stability that road uses is good, is conducive to be promoted electric furnace smelting yield, the advantage that good dedusting effect and waste heat recovery are efficient.
Above-mentioned purpose is realized by following technical scheme：
A kind of split type, curved flue of mixed type electric furnace entrance, including the curved flue ontology of entrance, the curved flue ontology of entrance
It is equipped with inlet end and outlet side, the outlet side of the curved flue ontology of entrance is connected with dust-extraction unit, the curved flue of entrance
Ontology includes top flue and underflue, the top flue and underflue by flanged joint, the top flue
It is connected with cooling water recirculation system on lateral wall, lower part water-circulating pipe is connected on the lateral wall of the underflue, under described
The side of portion's flue is equipped with the first water plug and oxygen-eliminating device, connects between the lower part water-circulating pipe and first water plug
It is connected to lower part water inlet pipe, lower part outlet pipe is connected between the lower part water-circulating pipe and the oxygen-eliminating device, described first draws water
The first water inlet pipe is connected between device and the oxygen-eliminating device.
Preferably, the dust-extraction unit includes dust remover and dedusting fan, the dust remover and the dedusting
Wind turbine is connected.
Preferably, the cooling water recirculation system includes top water-circulating pipe, the second water plug, pond and cooling tower,
The top water-circulating pipe is arranged on the lateral wall of the top flue, and the top water-circulating pipe and described second draws water dress
It is connected with top water inlet pipe between setting, top outlet pipe is connected between the top water-circulating pipe and the cooling tower, it is described
It is connected with the second water inlet pipe between second water plug and the cooling tower, water is connected between the cooling tower and the pond
Pipe.
Preferably, the bottom in the pond is equipped with blow-off line.
Preferably, the side of the oxygen-eliminating device is equipped with desalted water station, is connected between the desalted water station and the oxygen-eliminating device
There is third water pipe.
Preferably, the lower section of the oxygen-eliminating device is equipped with blowdown system, between the blowdown system and the oxygen-eliminating device
It is connected with the 4th water pipe.
Preferably, first water plug and second water plug are the pump house containing multiple water pumps.
Preferably, the top flue is made of alloy steel material.
Compared with prior art, beneficial effects of the present invention：
1. the heretofore described curved flue ontology of entrance is equipped with inlet end and outlet side, the air inlet of the curved flue ontology of entrance
End is connected with the gas outlet of electric furnace, and the outlet side of the curved flue ontology of entrance is connected with dust-extraction unit, can effectively remove
Dirt improves the efficiency of dedusting.
2. the heretofore described curved flue ontology of entrance includes top flue and underflue, the top flue and lower part
For flue by flanged joint, the curved flue of the entrance is split type entrance bend, once top flue or underflue leak,
To realize that half-section or whole section flue freely are replaced, have the advantages that the replacement repair time is short low with maintenance cost.
3. being connected with cooling water recirculation system on the lateral wall of heretofore described top flue, top flue uses water cooling
Flue, independent operating absorb the heat in super high temperature flue gas, can effectively solve that top flue heat intensity is big, vaporization is serious and
Leak period short problem, maintains the intensity of cooling of top flue, greatly extends top flue service life.
4. being connected with lower part water-circulating pipe on the lateral wall of heretofore described underflue, the side of the underflue
Equipped with the first water plug and oxygen-eliminating device, lower part water inlet is connected between the lower part water-circulating pipe and first water plug
Pipe, is connected with lower part outlet pipe between the lower part water-circulating pipe and the oxygen-eliminating device, first water plug and described remove
The first water inlet pipe is connected between oxygen device, the hot water of oxygen-eliminating device is sent by the first water plug to lower part water-circulating pipe, this is at present
The steam water interface that water in portion's water-circulating pipe is 110 DEG C, high-temperature flue gas carry out heat by underflue and lower part water-circulating pipe
It transmits, steam water interface is further heated, the water in the water-circulating pipe of lower part gradually becomes steam and is delivered to oxygen-eliminating device, gives deoxygenation
Device provides stable temperature, which is evaporated flue, and waterway circulating pipeline is short, and circulating water flow speed improves
The heat exchanger effectiveness of the curved flue of entrance.
5. heretofore described dust-extraction unit includes dust remover and dedusting fan, the dust remover and described remove
Dirt wind turbine is connected, and helps to improve the efficiency of dedusting.
6. heretofore described cooling water recirculation system includes top water-circulating pipe, the second water plug, pond and cooling
Tower, the top water-circulating pipe are arranged on the lateral wall of the top flue, and the top water-circulating pipe and described second is taken out
It is connected with top water inlet pipe between water installations, top outlet pipe is connected between the top water-circulating pipe and the cooling tower,
It is connected with the second water inlet pipe between second water plug and the cooling tower, is connected between the cooling tower and the pond
There is water pipe, the water in pond is preferably selected softened water, reduces water and generates dirt in the duct, the second water plug will be in pond
Water is pumped into the water-circulating pipe of top, and high-temperature flue gas carries out hot transmission by top flue and top water-circulating pipe, and cooling water becomes
Hot water, temperature are generally not more than 55 DEG C, and hot water enters cooling tower by top outlet pipe and cooled down, hot water become cold water again into
Enter in pond, whole process high temperature flue gas can pass through top flue without being damaged to top flue, top
Flue is in intact no deformation state always.
7. the bottom in heretofore described pond is equipped with blow-off line, be conducive to that the impurity precipitated in pond is discharged.
8. the side of heretofore described oxygen-eliminating device is equipped with desalted water station, connect between the desalted water station and the oxygen-eliminating device
It is connected to third water pipe, desalted water station can also remove the salt in water as much as possible other than supplying water to oxygen-eliminating device, miscellaneous in water
Matter is less, it is possible to reduce the corrosion to pipeline.
9. the lower section of heretofore described oxygen-eliminating device is equipped with blowdown system, the blowdown system and the oxygen-eliminating device it
Between be connected with the 4th water pipe, the spent hot water in oxygen-eliminating device can not only be discharged in blowdown system, can also be to the heat in spent hot water
It can carry out recycling.
10. heretofore described first water plug and second water plug are the water pump containing multiple water pumps
Room draws water efficient.
11. heretofore described top flue is made of alloy steel material, the wear-resistant strength of top flue is enhanced so that
The high speed that top flue can resist windward side is washed away, and the service life of top flue is extended.
Description of the drawings：
Attached drawing is used for providing further understanding the present invention, and a part for constitution instruction, the implementation with the present invention
Example is used to explain the present invention together, not be construed as limiting the invention.In the accompanying drawings：
Fig. 1 is the structural diagram of the present invention；
Reference numeral：1, the curved flue ontology of entrance；11, top flue；12, underflue；2, dust remover；21, it removes
Dirt device；22, dedusting fan；3, cooling water recirculation system；31, top water-circulating pipe；32, the second water plug；33, pond；
34, cooling tower；35, top water inlet pipe；36, top outlet pipe；37, the second water inlet pipe；4, lower part water-circulating pipe；5, it first draws water
Device；6, oxygen-eliminating device；7, lower part water inlet pipe；8, lower part outlet pipe；9, the first water inlet pipe；10, blow-off line；13, desalted water station；
14, third water pipe；15, blowdown system；16, the 4th water pipe.
Specific implementation mode：
As shown in Figure 1, a kind of split type, curved flue of mixed type electric furnace entrance, including the curved flue ontology 1 of entrance, entrance is curved
Flue ontology 1 is equipped with inlet end and outlet side, and the inlet end of the curved flue ontology of entrance 1 is connected with the gas outlet of electric furnace, enters
The outlet side of mouthful curved flue ontology 1 is connected with dust-extraction unit 2, can effectively dedusting, improve the efficiency of dedusting.
The curved flue ontology 1 of entrance includes top flue 11 and underflue 12, and top flue 12 and underflue 12 pass through
Flanged joint, the curved flue of the entrance is split type entrance bend, once 12 leak of top flue 11 or underflue, it can be real
Freely replacing for existing half-section or whole section flue, has the advantages that the replacement repair time is short low with maintenance cost.
Cooling water recirculation system 3 is connected on the lateral wall of top flue 11, top flue 11 uses water-cooled flue, independent
Operation absorbs the heat in super high temperature flue gas, can effectively solve that flue 11 heat intensity in top is big, vaporization is serious and the leak period
Short problem, maintains the intensity of cooling of top flue 11, greatly extends 11 service life of top flue.
Lower part water-circulating pipe 4 is connected on the lateral wall of underflue 12, the side of underflue 12 is drawn water equipped with first
Device 5 and oxygen-eliminating device 6 are connected with lower part water inlet pipe 7, lower part water-circulating pipe between lower part water-circulating pipe 4 and the first water plug 5
It is connected with lower part outlet pipe 8 between 4 and oxygen-eliminating device 6, the first water inlet pipe 9 is connected between the first water plug 5 and oxygen-eliminating device 6,
The hot water of oxygen-eliminating device 6 is sent by the first water plug 5 to lower part water-circulating pipe 4, and the water in lower part water-circulating pipe 4 is 110 at this time
DEG C steam water interface, high-temperature flue gas carries out hot transmission by underflue 12 and lower part water-circulating pipe 4, by steam water interface into
One step heats, and the water in lower part water-circulating pipe 4 gradually becomes steam and is delivered to oxygen-eliminating device 6, and stable temperature is provided to oxygen-eliminating device 6
Degree, the underflue 12 are evaporated flue, and waterway circulating pipeline is short, circulating water flow speed, improves the curved flue of entrance
Heat exchanger effectiveness.
Dust-extraction unit 2 includes dust remover 21 and dedusting fan 22, and dust remover 21 is connected with dedusting fan 22,
Help to improve the efficiency of dedusting.
Cooling water recirculation system 3 includes top water-circulating pipe 31, the second water plug 32, pond 33 and cooling tower 34, on
Portion's water-circulating pipe 31 is arranged on the lateral wall of top flue 11, is connected between top water-circulating pipe 31 and the second water plug 32
There is top water inlet pipe 35, top outlet pipe 36, the second water plug 32 are connected between top water-circulating pipe 31 and cooling tower 34
It is connected with the second water inlet pipe 37 between cooling tower 34, water pipe, the water in pond 33 are connected between cooling tower 34 and pond 33
It is preferably selected softened water, water is reduced and generates dirt in the duct, the water in pond 33 is pumped into upper water by the second water plug 32
In circulation pipe 31, high-temperature flue gas carries out hot transmission by top flue 11 and top water-circulating pipe 31, and cooling water becomes hot water, temperature
Degree is generally not more than 55 DEG C, and hot water is cooled down by top outlet pipe 36 into cooling tower 34, and hot water becomes cold water and enters back into
In pond 33, whole process high temperature flue gas can pass through top flue 11 without being damaged to top flue 11,
Top flue 11 is in intact no deformation state always.
The bottom in pond 33 is equipped with blow-off line 10, is conducive to that the impurity precipitated in pond 33 is discharged.
The side of oxygen-eliminating device 6 is equipped with desalted water station 13, and third water pipe 14 is connected between desalted water station 13 and oxygen-eliminating device 6,
Desalted water station 13 can also remove the salt in water, the impurity in water is less, can as much as possible other than supplying water to oxygen-eliminating device 6
To reduce the corrosion to pipeline.
The lower section of oxygen-eliminating device 6 is equipped with blowdown system 15, and the 4th water pipe is connected between blowdown system 15 and oxygen-eliminating device 6
16, the spent hot water in oxygen-eliminating device 6 can not only be discharged in blowdown system 15, can also be recycled again to the thermal energy in spent hot water
It utilizes.
First water plug 5 and the second water plug 32 are the pump house containing multiple water pumps, are drawn water efficient.
Top flue 11 is made of alloy steel material, enhances the wear-resistant strength of top flue 11 so that top flue 11
The high speed that windward side can be resisted is washed away, and the service life of top flue 11 is extended.
Each water pipe can add control valve flowing into and flow out with adjusting control water body.
The technical means disclosed in the embodiments of the present invention is not limited to the technical means disclosed in the above technical means, and further includes
The technical solution being made of the above technical characteristic equivalent replacement.The unaccomplished matter of the present invention, belongs to those skilled in the art's
Common knowledge.
Claims (8)
1. a kind of split type, curved flue of mixed type electric furnace entrance, including the curved flue ontology of entrance, it is characterised in that：The entrance
Curved flue ontology is equipped with inlet end and outlet side, and the outlet side of the curved flue ontology of entrance is connected with dust-extraction unit, described
The curved flue ontology of entrance includes top flue and underflue, and the top flue and underflue are described by flanged joint
It is connected with cooling water recirculation system on the lateral wall of top flue, lower part water cycle is connected on the lateral wall of the underflue
The side of pipe, the underflue is equipped with the first water plug and oxygen-eliminating device, and the lower part water-circulating pipe and described first draws water
It is connected with lower part water inlet pipe between device, lower part outlet pipe, institute are connected between the lower part water-circulating pipe and the oxygen-eliminating device
It states and is connected with the first water inlet pipe between the first water plug and the oxygen-eliminating device.
2. split type, the curved flue of mixed type electric furnace entrance according to claim 1, it is characterised in that：The dust-extraction unit
Including dust remover and dedusting fan, the dust remover is connected with the dedusting fan.
3. split type, the curved flue of mixed type electric furnace entrance according to claim 1, it is characterised in that：The cooling water follows
Loop system includes top water-circulating pipe, the second water plug, pond and cooling tower, and the top water-circulating pipe is arranged on described
On the lateral wall of portion's flue, top water inlet pipe is connected between the top water-circulating pipe and second water plug, it is described
Top outlet pipe is connected between top water-circulating pipe and the cooling tower, between second water plug and the cooling tower
It is connected with the second water inlet pipe, water pipe is connected between the cooling tower and the pond.
4. split type, the curved flue of mixed type electric furnace entrance according to claim 3, it is characterised in that：The bottom in the pond
Portion is equipped with blow-off line.
5. split type, the curved flue of mixed type electric furnace entrance according to claim 1, it is characterised in that：The oxygen-eliminating device
Side is equipped with desalted water station, and third water pipe is connected between the desalted water station and the oxygen-eliminating device.
6. split type, the curved flue of mixed type electric furnace entrance according to claim 1, it is characterised in that：The oxygen-eliminating device
Lower section is equipped with blowdown system, and the 4th water pipe is connected between the blowdown system and the oxygen-eliminating device.
7. split type, the curved flue of mixed type electric furnace entrance according to claim 1, it is characterised in that：Described first draws water
Device and second water plug are the pump house containing multiple water pumps.
8. split type, the curved flue of mixed type electric furnace entrance according to claim 1, it is characterised in that：The top flue
It is made of alloy steel material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810458935.2A CN108413779A (en) | 2018-05-15 | 2018-05-15 | A kind of split type, curved flue of mixed type electric furnace entrance |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810458935.2A CN108413779A (en) | 2018-05-15 | 2018-05-15 | A kind of split type, curved flue of mixed type electric furnace entrance |
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| CN108413779A true CN108413779A (en) | 2018-08-17 |
Family
ID=63139251
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| CN201810458935.2A Pending CN108413779A (en) | 2018-05-15 | 2018-05-15 | A kind of split type, curved flue of mixed type electric furnace entrance |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113758287A (en) * | 2020-06-17 | 2021-12-07 | 长兴旗滨玻璃有限公司 | Flue maintenance method |
| US20220275936A1 (en) * | 2021-02-26 | 2022-09-01 | Outokumpu Stainless USA. LLC | Cooling system for steel production system |
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| US20220275936A1 (en) * | 2021-02-26 | 2022-09-01 | Outokumpu Stainless USA. LLC | Cooling system for steel production system |
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