CN201753361U - Recycling device for waste heat of flue gas of annealing furnace in continuous annealing unit - Google Patents
Recycling device for waste heat of flue gas of annealing furnace in continuous annealing unit Download PDFInfo
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- CN201753361U CN201753361U CN2010202380252U CN201020238025U CN201753361U CN 201753361 U CN201753361 U CN 201753361U CN 2010202380252 U CN2010202380252 U CN 2010202380252U CN 201020238025 U CN201020238025 U CN 201020238025U CN 201753361 U CN201753361 U CN 201753361U
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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
- 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
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Abstract
The utility model provides a recycling device for the waste heat of flue gas of an annealing furnace in a continuous annealing unit. The recycling device is provided with a flue gas/superheated water heat exchanger (1), one end of the flue gas/superheated water heat exchanger (1) is communicated with a low-temperature water return pipeline (9) by a recycling pump (2), and the other end of the flue gas/superheated water heat exchanger (1) is communicated with a superheated water feeding pipeline (8); the recycling device is also provided with a cleaning section user heat exchanger (4), a heated-air drying user heat exchanger (5) after a cleaning section, a heated-air drying user heat exchanger (6) after water quenching and other user heat exchangers (7), wherein one end of each of the cleaning section user heat exchanger (4), one end of the heated-air drying user heat exchanger (5), one end of the heated-air drying user heat exchanger (6) and one end of the other user heat exchanger (7) are respectively communicated with the superheated water feeding pipeline by a valve bank (3), and the other end of the cleaning section user heat exchanger (4), the other end of the heated-air drying user heat exchanger (5), the other end of the heated-air drying user heat exchanger (6) and the other end of the other user heat exchanger (7) are respectively communicated with the low-temperature water return pipeline by a valve bank. The recycling device has the advantages of good energy saving property and small investment, is simple in operation and is safe and easy to control.
Description
Technical field
The utility model relates to energy-saving field, particularly relates to the re-use device of " fume afterheat " of the annealing furnace in a kind of continuous annealing unit.
Background technology
Along with the continuous progress of society and the continuous development of science and technology, energy shortage and environmental issue become the significant problem of the serious puzzlement national economic development, this forces industrial sector to continually develop and utilize new forms of energy on the one hand, adopt conservation measures on the other hand, promptly constantly employ new technology on the production technique, novel process updates old production technique and working condition is able to energy-conservation.
In the continuous annealing unit, the continuous annealing furnace energy consumption is occupied sizable ratio, and reduce cost, save energy etc. becomes the emphasis that annealing furnace is paid close attention to.Continuous annealing unit annealing furnace is mainly used in the rolling back recrystallization annealing of cold rolled strip, eliminates cold hardening, and the strip steel annealing volume of excellent performance, great surface quality is provided for building, household electrical appliances, automobile and other industries.Its technology is generally the cold technology of heating-soaking-slow cooling-cold soon-overaging-end.
The coal gas type of heating is generally adopted in the heating of annealing furnace, adopt radiator tube form type of heating: after the gas-fired, high-temperature flue gas flows along radiator tube, earlier by radiator tube radiation heating band steel, by after air/gas/the flue gas heat exchange device adds warm air, discharge through the radiator tube smoke exhaust pipe more then.Described radiator tube is a W type radiator tube.
The principle of work of W type radiator tube is: as shown in Figure 2, radiator tube 11 smoke evacuation ends are equipped with air/flue gas heat exchange device 12, the air of combustion-supporting effect 14 enters in the inlet of cold air pipe, after air/flue gas heat exchange device 12 heating, enter into burner 17 from vertical ducting 15, the coal gas that infeeds at burner 17 ends and gas inlet pipe 16 mixes after lighting a fire and burns, and products of combustion flows along direction shown in the arrow in radiator tube 11.In the process of flow of flue gas, the heat of high-temperature flue gas constantly passes to the band steel by radiator tube 11, reaches the purpose of heating zone steel.Flue gas is after after air/flue gas heat exchange device 12 adds warm air, discharge from smoke exhaust pipe 13.
After tested, the heat of taking away because of flue gas in the annealing furnace accounts for about 28% of whole heat supplied.Higher because of the flue gas funnel temperature, tend to utilize the waste heat of flue gas to come the preheating zone steel.For save energy, when entering in the stove, the band steel adds preheating section, after fume afterheat heated protective atmosphere, the protective atmosphere after heating is blowed to the band steel by recirculation blower, thus the heating zone steel, this is heat recovery for the first time.Through after the current UTILIZATION OF VESIDUAL HEAT IN, the last waste heat supply temperature of flue gas also has about 380～420 ℃, and it need be by mixing the cold wind cooling after chimney is discharged.
In the continuous annealing unit, except that the heating of band steel needs the energy, the warm air drying after other operation such as cleaning section, cleaning back are with the steel warm air drying and are gone out the stove shrend etc. all needs thermal source, and generally, these required thermals source provide by steam.
Summary of the invention
Technical problem to be solved in the utility model is: the re-use device that annealing furnace " fume afterheat " in a kind of continuous annealing unit is provided, its can flue gas is last about 380～420 ℃ fume afterheat as the required thermal source of annealing unit other operations, thereby for save energy with reduce product cost and make contributions.
The technical scheme that its technical problem that solves the utility model adopts is: be provided with flue gas/" superheated water " interchanger, the one end is communicated with " water at low temperature " Returning pipe by recycle pump, and its other end is communicated with " superheated water " transport pipe; Be provided with warm air drying user interchanger and other user's interchanger after warm air drying user interchanger after cleaning section user interchanger, the cleaning section, the shrend, each is communicated with their end with " superheated water " transport pipe by a valve group, and each is communicated with their the other end with " water at low temperature " Returning pipe by a valve group.
The utility model compared with prior art has following main beneficial effect:
1. can realize that fume afterheat utilizes again, can reclaim the energy about 12% once more, save energy.
2. utilize " superheated water " as the conveying heat energy carrier, less investment, it is little to produce maintenance.
3. utilize " superheated water " as carrying heat energy carrier, install simple to operationly, safety is easily controlled.
Description of drawings
Fig. 1 is the structural representation of the utility model fume afterheat re-use device.
Fig. 2 is the structural representation of the present W type radiator tube that uses.
Among the figure: 1. flue gas/" superheated water " interchanger; 2. recycle pump; 3. valve group; 4. cleaning section user interchanger; 5. warm air drying user interchanger after the cleaning section; 6. warm air drying user interchanger after the shrend; 7. other user's interchanger; 8. " superheated water " transport pipe; 9. " water at low temperature " Returning pipe; 10. flue gas/protective atmosphere interchanger; 11. radiator tube; 12. air/flue gas heat exchange device; 13. smoke exhaust pipe; 14. inlet of cold air pipe; 15. vertical ducting; 16. gas inlet pipe; 17. burner.
Embodiment
The utility model provides the re-use device of annealing furnace " fume afterheat " in the continuous annealing unit, this device mainly is made up of interchanger and transport pipe, as shown in Figure 1: be provided with flue gas/" superheated water " interchanger 1, the one end is communicated with " water at low temperature " Returning pipe 9 by recycle pump 2, and its other end is communicated with " superheated water " transport pipe 8.Be provided with warm air drying user interchanger 6 and other user's interchanger 7 after warm air drying user interchanger 5 after cleaning section user interchanger 4, the cleaning section, the shrend, each is communicated with their end with " superheated water " transport pipe 8 by a valve group 3, and each is communicated with their the other end with " water at low temperature " Returning pipe 9 by a valve group 3.
Above-mentioned flue gas/" superheated water " interchanger 1 adopts water/gas finned heat exchanger.
Above-mentioned flue gas/protective atmosphere interchanger 10 adopts gas/air-tube type interchanger.
Described valve group 3 can adopt stopping valve.
Described other user's interchanger 7 is meant water/water-to-water heat exchanger, and this interchanger can adopt plate-type heat exchanger.
Described cleaning section user's interchanger 4 can adopt water/water plate-type heat exchanger.
Warm air drying user interchanger 5 after the described cleaning section can adopt water/gas finned heat exchanger.
Warm air drying user interchanger 6 can adopt water/gas finned heat exchanger after the described shrend.
The re-use device of annealing furnace " fume afterheat " in the continuous annealing unit that the utility model provides can be realized the utilization again of annealing furnace in the continuous annealing unit " fume afterheat ".During use; this device is the mode of carrier with " superheated water "; 380～420 ℃ of left and right sides fume afterheats enforcements that 700 ℃ of left and right sides high-temperature flue gas of annealing furnace in the continuous annealing unit are implemented after the heat recovery for the first time through flue gas/protective atmosphere interchanger 10 are reclaimed once more, for annealing unit subsequent handling user provides thermal source.
Sketch operating process of the present utility model below in conjunction with Fig. 1.
The first step through " water at low temperature " heating from about 80～95 ℃ of 1 pair of flue gas/superheated water interchanger, makes this " water at low temperature " be heated into high temperature " superheated water " about 120～150 ℃ the flue gas after the heat recovery first time; Second step was delivered to each user with " superheated water " that produces with " superheated water " transport pipe 8, and 140～160 ℃ of left and right sides low-temperature flue gas after the heat exchange are simultaneously discharged through chimney;
The 3rd step, open the valve group 3 of each user front and back, after warm air drying user interchanger 5, the shrend after warm air drying user interchanger 6 and other user's interchanger 7 heat exchange, " superheated water " becomes " water at low temperature " after each user's interchanger is cleaning section user interchanger 4, cleaning section;
The 4th step under the effect of recycle pump 2, was back to flue gas/superheated water interchanger 1 with the 3rd step described " water at low temperature " with " water at low temperature " Returning pipe 9, made this " water at low temperature " be heated into 120～150 ℃ of left and right sides high temperature " superheated water " once more;
Through above-mentioned recycle step of going round and beginning again, realize utilization again to " fume afterheat " of the annealing furnace in the continuous annealing unit.
Among Fig. 1: the flow direction of user " water at low temperature " after the flow direction of " superheated water " after " A " arrow is represented to heat, " B " arrow are represented to heat, " C " arrow is represented the flow direction of flue gas.
Claims (6)
1. the re-use device of " fume afterheat " of the annealing furnace in the continuous annealing unit, it is characterized in that this device is provided with flue gas/" superheated water " interchanger (1), the one end is communicated with " water at low temperature " Returning pipe (9) by recycle pump (2), and its other end is communicated with " superheated water " transport pipe (8); Be provided with warm air drying user interchanger (6) and other user's interchanger (7) after warm air drying user interchanger (5) after cleaning section user interchanger (4), the cleaning section, the shrend, each is communicated with their end with " superheated water " transport pipe (8) by a valve group (3), and each is communicated with their the other end with " water at low temperature " Returning pipe (9) by a valve group (3).
2. the re-use device of " fume afterheat " of the annealing furnace in the continuous annealing unit according to claim 1 is characterized in that described valve group (3) adopts stopping valve.
3. the re-use device of " fume afterheat " of the annealing furnace in the continuous annealing unit according to claim 1 is characterized in that described other user's interchanger (7) is meant water/water-to-water heat exchanger, and this interchanger adopts plate-type heat exchanger.
4. the re-use device of " fume afterheat " of the annealing furnace in the continuous annealing unit according to claim 1 is characterized in that warm air drying user interchanger (5) adopts water/gas finned heat exchanger after the described cleaning section.
5. the re-use device of " fume afterheat " of the annealing furnace in the continuous annealing unit according to claim 1 is characterized in that described cleaning section user's interchanger (4) adopts water/water plate-type heat exchanger.
6. the re-use device of " fume afterheat " of the annealing furnace in the continuous annealing unit according to claim 1 is characterized in that warm air drying user interchanger (6) adopts water/gas finned heat exchanger after the described shrend.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202380252U CN201753361U (en) | 2010-06-25 | 2010-06-25 | Recycling device for waste heat of flue gas of annealing furnace in continuous annealing unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202380252U CN201753361U (en) | 2010-06-25 | 2010-06-25 | Recycling device for waste heat of flue gas of annealing furnace in continuous annealing unit |
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| Publication Number | Publication Date |
|---|---|
| CN201753361U true CN201753361U (en) | 2011-03-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202380252U Expired - Fee Related CN201753361U (en) | 2010-06-25 | 2010-06-25 | Recycling device for waste heat of flue gas of annealing furnace in continuous annealing unit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108148956A (en) * | 2016-12-02 | 2018-06-12 | 宝山钢铁股份有限公司 | A kind of jumbo jet heating equipment of continuous annealing unit |
| EP3473737A4 (en) * | 2016-08-19 | 2019-05-15 | Primetals Technologies Japan, Ltd. | Continuous annealing facility |
-
2010
- 2010-06-25 CN CN2010202380252U patent/CN201753361U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3473737A4 (en) * | 2016-08-19 | 2019-05-15 | Primetals Technologies Japan, Ltd. | Continuous annealing facility |
| US10662536B2 (en) | 2016-08-19 | 2020-05-26 | Primetals Technologies Japan, Ltd. | Continuous annealing equipment |
| CN108148956A (en) * | 2016-12-02 | 2018-06-12 | 宝山钢铁股份有限公司 | A kind of jumbo jet heating equipment of continuous annealing unit |
| CN108148956B (en) * | 2016-12-02 | 2019-10-25 | 宝山钢铁股份有限公司 | A kind of jumbo jet heating equipment of continuous annealing unit |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110302 Termination date: 20160625 |