CN104729307A - Heat exchange set for flue gas waste heat recovery - Google Patents
Heat exchange set for flue gas waste heat recovery Download PDFInfo
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- CN104729307A CN104729307A CN201310740487.2A CN201310740487A CN104729307A CN 104729307 A CN104729307 A CN 104729307A CN 201310740487 A CN201310740487 A CN 201310740487A CN 104729307 A CN104729307 A CN 104729307A
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- flue gas
- heat
- exhaust gases
- gases passes
- flue
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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
- Y02P10/25—Process efficiency
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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
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply
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- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
A heat exchange set for flue gas waste heat recovery comprises a flue gas inlet, a heat-accumulating temperature homogenizer, a flue gas passage, a heat pipe bank, a flue gas outlet, an ash hopper, a circulation pipe, a steam drum and a steam accumulator. The heat exchange set is characterized in that the top of the flue gas passage is provided with the flue gas inlet, the outside of the bottom of the flue gas passage is provided with the flue gas outlet, the bottom of the flue gas passage is provided with the ash hopper, the heat pipe bank is disposed within the flue gas passage and is connected with the steam drum through the circulation pipe, the steam drum is connected with the steam accumulator through a pipe, the steam drum is disposed on the top of the outside of the flue gas passage, the heat-accumulating temperature homogenizer is disposed at the upper end of the heat pipe bank in the flue gas passage, the heat-accumulating temperature homogenizer comprises carbon-carbon composite accumulating members and a shock wave ash-remover, and the shock wave ash-remove is disposed among the carbon-carbon composite accumulating members segment by segment. The heat exchange set has the advantages that heat in the flue gas can be recovered to the maximum extent, investment on waste heat utilization equipment is lower and the waste heat utilization equipment is more stable.
Description
Technical field
The present invention relates to a kind of waste heat utilization equipment, particularly a kind of heat transmission equipment for flue gas waste heat recovery, belong to fume afterheat and utilize technical field.
Background technology
Steel and iron industry consumes mass energy every year, and the high-temperature flue gas produced in smelting process and equipment cooling have taken away large energy.Because mineral hot furnace steel-making flue-gas temperature is very high, after trapping, enter the temperature of pipeline generally at about 1300 DEG C, and flue-gas temperature big ups and downs, dustiness is large, and light water tubulation waste heat boiler is difficult to the waste heat recovery applying to mineral heating furnace flue.Mineral hot furnace is in a smelting cycle, and flue-gas temperature fluctuation is very large, is usually increased to 1300 DEG C from 110 DEG C, and then is down to 110 DEG C.General heat pipe steam generator can not adapt to above operating mode completely, mainly has the following disadvantages:
1, general heat pipe steam generator operating temperature is not more than 800 DEG C, in other words, adopts general heat pipe steam generator can not recovered flue gas heat completely.
2, residual neat recovering system is complicated, and other cooling systems must be adopted to make flue-gas temperature be reduced to less than 800 DEG C.
3, the alternately change of flue-gas temperature causes heat pipe steam generator pressure parts intensity to decline, and easily leaks.
Because mineral heating furnace flue temperature fluctuation is violent, wave amplitude is large, and waste-heat recovery device just must design enough large, guarantees that high-temperature flue gas also can effective cooling.But actual steam output is far below the evaporation capacity of waste heat recovery apparatus, there is the situation of low load with strong power.This just relatively reduces the economic worth of waste heat recovery apparatus, adds the investment of waste heat recovery apparatus.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of heat transmission equipment for flue gas waste heat recovery is provided, this equipment can not only heat energy to greatest extent in recovered flue gas, and it is simple and reasonable, increase thermal storage temperature equalizer, due to the heat-absorbing action of heat storage, alleviate the rapid drawdown that rises sharply of flue-gas temperature, solution is expanded with heat and contract with cold problem, avoid heating pipe group to damage because flue-gas temperature fluctuation produces, reduce the investment of waste heat utilization equipment, improve the stability of waste heat utilization equipment, and waste heat recovery apparatus is simple, does not need other cooling systems.
According to technical scheme provided by the invention, a kind of heat transmission equipment for flue gas waste heat recovery, comprise gas approach, thermal storage temperature equalizer, exhaust gases passes, heating pipe group, exhanst gas outlet, ash bucket, circulating line, steam drum, steam accumulator, it is characterized in that: described exhaust gases passes top is provided with gas approach, exhaust gases passes bottom outside is provided with exhanst gas outlet, ash bucket is provided with bottom exhaust gases passes, exhaust gases passes inside is provided with heating pipe group, heating pipe group is connected with steam drum by circulating line, steam drum connects steam accumulator by pipeline, steam drum is located at exhaust gases passes outside top position, described thermal storage temperature equalizer is arranged at the inner heating pipe group upper end of exhaust gases passes, described thermal storage temperature equalizer comprises carbon-silicon composite material heat storage, shock-wave ash-clearing device, described shock-wave ash-clearing device step-by-step arrangement is between carbon-silicon composite material heat storage.
The invention has the beneficial effects as follows: because mineral heating furnace flue temperature fluctuation is violent, flue-gas temperature peak value is high, and when flue gas is after thermal storage temperature equalizer process of the present invention, flue-gas temperature fluctuating range can greatly reduce, and also reduces the peak value of flue-gas temperature simultaneously.Through the flue gas of thermal storage temperature equalizer by heating pipe group, because flue-gas temperature peak value reduces, heating pipe group can be made to invest and to reduce; Flue-gas temperature fluctuating range reduces, be then conducive to the stability improving heating pipe group, increase the service life.
The invention has the advantages that:
1. thermal storage temperature equalizer to flue-gas temperature peak load shifting, can reduce the maximum temperature of flue gas, reduces the fluctuating range of flue-gas temperature, alleviate the rapid drawdown that rises sharply of flue-gas temperature, solve problem of expanding with heat and contract with cold;
2. adopt heating pipe group to reclaim the waste heat of mineral hot furnace high-temperature flue gas, realize mineral heating furnace flue UTILIZATION OF VESIDUAL HEAT IN;
3. reduce the investment of waste heat utilization equipment, improve the stability of waste heat utilization equipment.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
In figure: 1. gas approach, 2. thermal storage temperature equalizer, 3. carbon-silicon composite material heat storage, 4. shock-wave ash-clearing device, 5. exhaust gases passes, 6. heating pipe group, 7. exhanst gas outlet, 8. ash bucket, 9. steam accumulator, 10. steam drum, 11. circulating lines.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described.
A kind of heat transmission equipment for flue gas waste heat recovery in the present invention, comprise gas approach 1, thermal storage temperature equalizer 2, exhaust gases passes 5, heating pipe group 6, exhanst gas outlet 7, ash bucket 8, circulating line 11, steam drum 10, steam accumulator 9, it is characterized in that: described exhaust gases passes 5 top is provided with gas approach 1, exhaust gases passes 5 bottom outside is provided with exhanst gas outlet 7, ash bucket 8 is provided with bottom exhaust gases passes 5, exhaust gases passes 5 inside is provided with heating pipe group 6, heating pipe group 6 is connected with steam drum 10 by circulating line 11, steam drum 10 connects steam accumulator 9 by pipeline, steam drum 10 is located at exhaust gases passes 5 outside top position, described thermal storage temperature equalizer 9 is arranged at exhaust gases passes 5 inner heating pipe group 6 upper end, described thermal storage temperature equalizer 2 comprises carbon-silicon composite material heat storage 3, shock-wave ash-clearing device 4, described shock-wave ash-clearing device 4 step-by-step arrangement is between carbon-silicon composite material heat storage 3.
The course of work of the present invention: 35000KVA mineral heating furnace flue flow 32 × 10
4nm
3/ h, temperature 1300 DEG C, dust content 18g/Nm
3discharge by stove, cold wind is mixed into through water-cooled flue, exhaust gases passes 5 is entered from gas approach 1 after combusting carbon monoxide gas, flow through thermal storage temperature equalizer 2 and heating pipe group 6 successively, release heat, temperature reduces, finally discharge from exhanst gas outlet 7, when flue-gas temperature is higher than 700 DEG C, carbon-silicon composite material heat storage 3 is from smoke absorption heat, when flue-gas temperature is lower than 700 DEG C, carbon-silicon composite material heat storage 3 releases heat to flue gas, flue-gas temperature is kept to stablize, heating pipe group 6 is avoided to damage because flue-gas temperature fluctuation produces, in addition, due to the heat-absorbing action of carbon-silicon composite material heat storage 3, heating pipe group 6 absorbs heat always from flue gas, in steam drum 10, saturation water enters heating pipe group 6 along circulating line 11, produce steam after absorbing high-temperature flue gas waste heat and enter steam drum 10, steam in steam drum 10 enters steam accumulator 9 by pipeline, outer for stable after regulating, continuously, parameter meets the steam that user requires.Due to the dust containing high concentration in mineral heating furnace flue, carbon-silicon composite material heat storage 3 superficial dust after operation a period of time, have a strong impact on accumulation of heat effect, timing deashing is carried out by shock-wave ash-clearing device 4 pairs of carbon-silicon composite material heat storages 3, entered in ash bucket 8 by the dust exfoliation accumulating in carbon-silicon composite material heat storage 3 outer surface, dust is regularly transported.
Because thermal storage temperature equalizer 2 can to flue-gas temperature peak load shifting, reduce the maximum temperature of flue gas, reduce the fluctuating range of flue-gas temperature, alleviate the rapid drawdown that rises sharply of flue-gas temperature, thus the investment of residual heat using device can be reduced, improve the stability of residual heat using device, and all kinds of waste heat utilization equipment can be configured safely.
For 35000KVA mineral hot furnace waste heat utilization equipment, present device compares with conventional equipment, is described as follows:
Note: work per year and calculate for 330th.
As can be seen here, the present invention can not only heat energy to greatest extent in recovered flue gas, and it is simple and reasonable, increase thermal storage temperature equalizer, due to the heat-absorbing action of heat storage, alleviate the rapid drawdown that rises sharply of flue-gas temperature, solution is expanded with heat and contract with cold problem, avoid heating pipe group to damage because flue-gas temperature fluctuation produces, reduce the investment of waste heat utilization equipment, improve the stability of waste heat utilization equipment.
Claims (1)
1. the heat transmission equipment for flue gas waste heat recovery, comprise gas approach, thermal storage temperature equalizer, exhaust gases passes, heating pipe group, exhanst gas outlet, ash bucket, circulating line, steam drum, steam accumulator, it is characterized in that: described exhaust gases passes top is provided with gas approach, exhaust gases passes bottom outside is provided with exhanst gas outlet, ash bucket is provided with bottom exhaust gases passes, exhaust gases passes inside is provided with heating pipe group, heating pipe group is connected with steam drum by circulating line, steam drum connects steam accumulator by pipeline, steam drum is located at exhaust gases passes outside top position, described thermal storage temperature equalizer is arranged at the inner heating pipe group upper end of exhaust gases passes, described thermal storage temperature equalizer comprises carbon-silicon composite material heat storage, shock-wave ash-clearing device, described shock-wave ash-clearing device step-by-step arrangement is between carbon-silicon composite material heat storage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310740487.2A CN104729307A (en) | 2013-12-21 | 2013-12-21 | Heat exchange set for flue gas waste heat recovery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310740487.2A CN104729307A (en) | 2013-12-21 | 2013-12-21 | Heat exchange set for flue gas waste heat recovery |
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| Publication Number | Publication Date |
|---|---|
| CN104729307A true CN104729307A (en) | 2015-06-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310740487.2A Pending CN104729307A (en) | 2013-12-21 | 2013-12-21 | Heat exchange set for flue gas waste heat recovery |
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| CN (1) | CN104729307A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106480251A (en) * | 2015-09-01 | 2017-03-08 | 丁玉峰 | A kind of heat storage type converter exhaust heat recovering method and device |
| CN108106457A (en) * | 2017-03-01 | 2018-06-01 | 昊姆（上海）节能科技有限公司 | Gas cleaning and waste-heat recovery device |
-
2013
- 2013-12-21 CN CN201310740487.2A patent/CN104729307A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106480251A (en) * | 2015-09-01 | 2017-03-08 | 丁玉峰 | A kind of heat storage type converter exhaust heat recovering method and device |
| CN108106457A (en) * | 2017-03-01 | 2018-06-01 | 昊姆（上海）节能科技有限公司 | Gas cleaning and waste-heat recovery device |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150624 |
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| WD01 | Invention patent application deemed withdrawn after publication |