CN101349511A - Flue gas waste heat recovery method and apparatus for ferroalloy cluster electric stove - Google Patents
Flue gas waste heat recovery method and apparatus for ferroalloy cluster electric stove Download PDFInfo
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- CN101349511A CN101349511A CNA2008101193720A CN200810119372A CN101349511A CN 101349511 A CN101349511 A CN 101349511A CN A2008101193720 A CNA2008101193720 A CN A2008101193720A CN 200810119372 A CN200810119372 A CN 200810119372A CN 101349511 A CN101349511 A CN 101349511A
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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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Abstract
The invention relates to a flue gas waste heat recovery process of a ferrous alloy cluster electric furnace and a device, in particular to a waste heat recovery device for a cluster electric furnace, wherein the waste heat recovery device comprises a waste heat recovery boiler and a plurality of first flues which respectively connect a plurality of electric furnaces in the cluster electric furnace to the same waste heat recovery boiler. The invention further discloses a process for recycling flue gas waste heat of the cluster electric furnace, which comprises collecting flue gas of a plurality of electric furnaces in the cluster electric furnace to the same waste heat recovery boiler to recycle.
Description
Technical field
[0001] the present invention relates to a kind of method and apparatus that reclaims the fume afterheat of cluster electric stove, relate in particular to the method and apparatus that the fume afterheat of ferroalloy cluster electric stove is reclaimed by the separate unit waste heat boiler.
Background technology
[0002] common, iron alloy electric furnace is a main energy sources with electric power, and produces a large amount of middle low-temperature flue gas in smelting process.Heat in these flue gases can be recovered and be used for heat supply or generating.Yet, have periodic fluctuation in iron alloy electric furnace flue-gas temperature in platform refining process, for example flue-gas temperature can reduce to a certain extent during tapping a blast furnace.The fluctuation of flue-gas temperature can cause the hot water of waste heat boiler production or steam parameter correspondingly to fluctuate, and perhaps may cause waste heat boiler normally not move.For this kind situation, common way is the exhaust gas volumn of adjusting the waste heat boiler feedwater or entering waste heat boiler.The way of above-mentioned reply flue-gas temperature fluctuation is comparatively passive way, particularly adjusts the exhaust gas volumn that enters waste heat boiler, and the method can cause residual heat resources not to be fully utilized and waste.
[0003] in addition, for the flue gas waste heat recovery of ferroalloy cluster electric stove, every supporting waste heat boiler of electric furnace can make that the cost recovery of residual heat resources is higher.
Summary of the invention
[0004] therefore, the present invention proposes a kind of ferroalloy cluster electric stove flue gas waste heat recovery method and device, realizes efficient, lasting, the recovery stably of ferroalloy cluster electric stove residual heat resources.
[0005] a kind of waste-heat recovery device that is used for cluster electric stove is disclosed according to an aspect of the present invention, this waste-heat recovery device comprises heat recovery boiler and respectively many electric furnaces in the cluster electric stove is connected to a plurality of first flues of same heat recovery boiler.
[0006] according to another aspect of the present invention, disclose the method that a kind of fume afterheat that is used for cluster electric stove reclaims, comprising that flue gas with a plurality of electric furnaces in the cluster electric stove is pooled to carries out waste heat recovery in the same heat recovery boiler.
[0007] the present invention has the advantage of following several aspects.At first, in the cluster iron alloy electric furnace, many supporting waste heat boilers of electric furnace carry out waste heat recovery.Because the asynchronism(-nization) of tapping a blast furnace of each electric furnace, thereby the fluctuation that the flue gas of many electric furnaces compiles the back flue-gas temperature slows down, and helps the high efficiente callback of residual heat resources.In addition, in the cluster iron alloy electric furnace, many supporting waste heat boilers of electric furnace carry out waste heat recovery, compare with a supporting waste heat boiler of electric furnace, can greatly save investment, improve the economy of waste heat recovery.
Description of drawings
[0008] Fig. 1 shows the schematic diagram according to waste-heat recovery device of the present invention.
The specific embodiment
[0009] as shown in Figure 1, in example waste-heat recovery device of the present invention, comprise four iron alloy electric furnaces 1.But be to be understood that iron alloy electric furnace 1 of the present invention never is limited to this concrete example, and can be the iron alloy electric furnace 1 of any other quantity, as long as more than or equal to 2.In addition, notion of the present invention also can be applicable to other similar electric furnaces, for example furnace of calcium carbide etc.
[0010] every iron alloy electric furnace 1 includes the flue separately 11 of drawing from its exhanst gas outlet, and sequentially is installed in aerial cooler 2, cyclone separator 3 and air-introduced machine 4 in the flue 11.Outlet intersection at each flue 11 also can be provided with sack cleaner 5.Aerial cooler 2 can carry out the flue gas that passes through the free convection cooling to reduce the temperature of flue gas, makes the temperature of flue gas when entering sack cleaner 5 of dust-laden be lower than the safe operation temperature that cloth bag can bear, in order to avoid burn out cloth bag.3 pairs of cooled smoke of cyclone dust collectors are carried out pre-dedusting.The flue gas of blower fan 4 after with pre-dedusting blasts sack cleaner 5, further the fine particle thing in the flue gas is removed and the emptying clean flue gas.
[0011] in addition, every iron alloy electric furnace 1 also is provided with waste heat boiler by-pass damper 6 in its flue 11, waste heat boiler by-pass damper 6 is positioned in flue 11 near the exhanst gas outlet part of iron alloy electric furnace 1 and in the upstream of aerial cooler 2 and cyclone separator 3, is used to close or open the flue 11 in this baffle plate downstream.
[0012], between every iron alloy electric furnace 1 and corresponding waste heat boiler by-pass damper 6, leads to the flue 10 that leads to waste heat boiler 9 according to the preferred embodiment.In this flue 10, be provided with exhaust-heat boiler inlet baffle plate 7, be used for closing or open this flue 10 that leads to waste heat boiler 9 according to the working condition of corresponding iron alloy electric furnace 1 and waste heat boiler 9.Each flue 10 is pooled in the waste heat boiler 9.
[0013] according to other embodiments of the invention, can in the smoke inlet part of waste heat boiler 9, single exhaust-heat boiler inlet baffle plate 7 be set the downstream of flue 10 junctions, to replace the exhaust-heat boiler inlet baffle plate 7 in each flue 10.But the exhaust-heat boiler inlet baffle plate 7 that is provided with in each flue 10 separately is preferred, because can control each flue 10 separately.Even certain iron alloy electric furnace 1 breaks down or overhauls etc. like this, also can close corresponding flue 10, thereby not influence the waste heat recovery of other iron alloy electric furnaces 1.
[0014] in the discharge section of waste heat boiler 9, also is provided with 4 discharge flues 12 that lead to the flue 11 of every iron alloy electric furnace 1 respectively.Discharge flue 12 and cross at the upstream end and the flue 11 of air-introduced machine 4 respectively, carry out further dedusting and emptying thereby blast sack cleaner 5 by air-introduced machine 4 from the flue gas of cooling that waste heat boiler 9 is discharged.The ability that the discharge flue 12 identical with the quantity of iron alloy electric furnace 1 can make full use of the air-introduced machine 4 of every iron alloy electric furnace 1 is set like this, and realizes cost savings.Discharge in the flue 12 at each, heat boiler outlet baffle plate 8 can also be set.
[0015] it not is necessary still the discharge flue 12 identical with the quantity of iron alloy electric furnace 1 being set.For example in other embodiments, single discharge flue 12 can be set, it blasts flue gas by the air-introduced machine of independent setting sack cleaner 5.Perhaps, the discharge flue 12 that quantity is slightly less than iron alloy electric furnace 1 can be set, and flue gas be blasted sack cleaner 5 by the air-introduced machine 4 of part iron alloy electric furnace 1.In addition, in certain embodiments, heat boiler outlet baffle plate 8 can be arranged on the exit of waste heat boiler 9 and be positioned at discharge flue 12 upstreams of branch, thereby single heat boiler outlet baffle plate 8 can only be set.
[0016] in this example embodiment, every iron alloy electric furnace 1 is all drawn the flue that leads to identical waste heat boiler 9 in the position of waste heat boiler by-pass damper 6 upstreams, thereby forms waste-heat recovery device according to the preferred embodiment of the invention.
[0017] in waste-heat recovery device according to other embodiments of the invention, for example when the quantity of iron alloy electric furnace 1 more and when single waste heat boiler 9 being set may causing waste heat boiler 9 excessive, iron alloy electric furnace 1 can be divided into some groups, the iron alloy electric furnace 1 in each group is drawn flue 10 and is led to identical waste heat boiler 9.As long as exist two and above iron alloy electric furnace 1 by the situation that single waste heat boiler 9 carries out waste heat recovery, just fall into scope of the present invention.
[0018] if iron alloy electric furnace 1 does not install additional according to waste-heat recovery device of the present invention, then the discharge process of flue gas is as follows.The flue gas that iron alloy electric furnace 1 is discharged at first carries out the free convection cooling through aerial cooler 2 by flue 11, flue gas after the cooling enters cyclone dust collectors 3 and carries out pre-dedusting, flue gas after the pre-dedusting blasts sack cleaner 5 under the effect of blower fan 4, thereby the fine particle thing in the flue gas is removed and with the clean flue gas emptying.
[0019] iron alloy electric furnace 1 installs additional according to behind the waste-heat recovery device of the present invention, and original flue 11 remains unchanged.When waste heat boiler 9 normal runnings, waste heat boiler by-pass damper 6 is closed, and exhaust-heat boiler inlet baffle plate 7 and heat boiler outlet baffle plate 8 are opened, thereby the flue gas of many iron alloy electric furnaces 1 is compiled and introduce waste heat boiler 9 and carry out heat exchange by the flue of drawing at the smoke outlet of iron alloy electric furnace 1, flue gas after the heat exchange is discharged from waste heat boiler 9, and discharges by discharging flue 12 and air-introduced machine.Promptly under waste heat boiler 9 normal operation, waste heat boiler by-pass damper 6 is closed, and exhaust-heat boiler inlet baffle plate 7 and heat boiler outlet baffle plate 8 are opened, and the flue gas of iron alloy electric furnace 1 is directly by discharging after waste heat boiler 9 heat exchange.Like this, because the asynchronism(-nization) of tapping a blast furnace of each electric furnace, thereby the fluctuation that the flue gas of many electric furnaces compiles the back flue-gas temperature slows down, and helps the high efficiente callback of residual heat resources.In addition, compare, can greatly save investment, improve the economy of waste heat recovery with a supporting waste heat boiler of electric furnace.
[0020] breaks down or overhaul etc. that iron alloy electric furnace 1 still can normally move under the situation at waste heat boiler 9 for guaranteeing, in these cases, exhaust-heat boiler inlet baffle plate 7 and heat boiler outlet baffle plate 8 are closed, and waste heat boiler by-pass damper 6 is opened, and flue gas discharges by the flue 11 of iron alloy electric furnace 1 like this.
[0021] above explanation only is to illustrate of the present invention, and scope of the present invention is not limited to these explanations and diagram.Those skilled in the art are reading other distortion that can expect after the disclosure and are revising the scope of the present invention that all falls into.
Claims (14)
1. waste-heat recovery device that is used for cluster electric stove, this waste-heat recovery device comprises heat recovery boiler and respectively many electric furnaces in the cluster electric stove is connected to a plurality of first flues of same heat recovery boiler.
2. the waste-heat recovery device that is used for cluster electric stove according to claim 1, it is characterized in that, this waste-heat recovery device only comprises single heat recovery boiler, and the whole electric furnaces in the cluster electric stove all are connected respectively to described single heat recovery boiler by described a plurality of first flues.
3. the waste-heat recovery device that is used for cluster electric stove according to claim 1 is characterized in that, described cluster electric stove is a ferroalloy cluster electric stove.
4. the waste-heat recovery device that is used for cluster electric stove according to claim 2, it is characterized in that, all be furnished with the exhaust-heat boiler inlet baffle plate that is used to open and close corresponding first flue in described a plurality of first flue, and this waste-heat recovery device also comprises the discharge flue of discharging flue gas, discharges to be furnished with in the flue to be used to open and close the heat boiler outlet baffle plate of discharging flue.
5. the waste-heat recovery device that is used for cluster electric stove according to claim 4, it is characterized in that, each all comprises second flue described cluster electric stove, described second flue is connected to sack cleaner with corresponding electric furnace, and the sack cleaner upstream is disposed in order have surplus heat boiler by-pass baffles, aerial cooler, cyclone separator and air-introduced machine in described second flue, and this waste heat boiler by-pass baffles is used to open and close described second flue.
6. the waste-heat recovery device that is used for cluster electric stove according to claim 5, it is characterized in that, described a plurality of first flue is drawn from corresponding described second flue in the upstream of corresponding described waste heat boiler by-pass baffles respectively, and the quantity of described discharge flue is identical with the quantity of described cluster electric stove, and is connected to corresponding described second flue in the upstream of corresponding described air-introduced machine.
7. the waste-heat recovery device that is used for cluster electric stove according to claim 6, it is characterized in that, when described waste heat boiler operate as normal, described waste heat boiler by-pass baffles is closed, described exhaust-heat boiler inlet baffle plate and described heat boiler outlet baffle plate are opened, and are sent to described waste heat boiler by described a plurality of first flues from cluster electric stove to allow flue gas; And when described waste heat boiler non-normal working, described waste heat boiler by-pass baffles is opened, and described exhaust-heat boiler inlet baffle plate and described heat boiler outlet flapper closure are discharged by described second flue from cluster electric stove to allow flue gas.
8. method that the fume afterheat that is used for cluster electric stove reclaims comprises:
The flue gas of a plurality of electric furnaces in the cluster electric stove is pooled to carries out waste heat recovery in the same heat recovery boiler.
9. method according to claim 8 is characterized in that, the whole electric furnaces in the cluster electric stove are connected respectively to single heat recovery boiler by a plurality of first flues, carries out waste heat recovery to compile flue gas to described single heat recovery boiler.
10. method according to claim 8 is characterized in that, described cluster electric stove is an iron alloy electric furnace.
11. method according to claim 9, it is characterized in that, all be furnished with the exhaust-heat boiler inlet baffle plate that is used to open and close corresponding first flue in described a plurality of first flue, and described waste heat boiler also comprises the discharge flue of discharging flue gas, discharges to be furnished with in the flue to be used to open and close the heat boiler outlet baffle plate of discharging flue.
12. method according to claim 11, it is characterized in that, each all comprises second flue described cluster electric stove, described second flue is connected to sack cleaner with corresponding electric furnace, and the sack cleaner upstream is disposed in order have surplus heat boiler by-pass baffles, aerial cooler, cyclone separator and air-introduced machine in described second flue, and this waste heat boiler by-pass baffles is used for opening and closing corresponding described second flue.
13. method according to claim 12, it is characterized in that, described a plurality of first flue is drawn from corresponding described second flue in the upstream of corresponding described waste heat boiler by-pass baffles respectively, and the quantity of described discharge flue is identical with the quantity of described cluster electric stove, and is connected to corresponding described second flue in the upstream of corresponding described air-introduced machine.
14. method according to claim 13, it is characterized in that, when described waste heat boiler operate as normal, described waste heat boiler by-pass baffles is closed, described exhaust-heat boiler inlet baffle plate and described heat boiler outlet baffle plate are opened, and are sent to described waste heat boiler by described a plurality of first flues from cluster electric stove to allow flue gas; And when described waste heat boiler non-normal working, described waste heat boiler by-pass baffles is opened, and described exhaust-heat boiler inlet baffle plate and described heat boiler outlet flapper closure are discharged by described second flue from cluster electric stove to allow flue gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101193720A CN101349511A (en) | 2008-09-04 | 2008-09-04 | Flue gas waste heat recovery method and apparatus for ferroalloy cluster electric stove |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101193720A CN101349511A (en) | 2008-09-04 | 2008-09-04 | Flue gas waste heat recovery method and apparatus for ferroalloy cluster electric stove |
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| CN101349511A true CN101349511A (en) | 2009-01-21 |
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| CNA2008101193720A Pending CN101349511A (en) | 2008-09-04 | 2008-09-04 | Flue gas waste heat recovery method and apparatus for ferroalloy cluster electric stove |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105258145A (en) * | 2015-11-13 | 2016-01-20 | 江苏绿叶锅炉有限公司 | Flue type waste heat boiler |
| CN106091705A (en) * | 2016-06-15 | 2016-11-09 | 山东钢铁股份有限公司 | A kind of improve the method and apparatus that sintering waste heat utilizes cluster generated energy |
| CN111966054A (en) * | 2020-07-15 | 2020-11-20 | 国家能源集团宁夏煤业有限责任公司 | Whole-plant large-scale interlocking protection method and device for chemical device |
| CN116678007A (en) * | 2023-05-26 | 2023-09-01 | 昌吉学院 | Boiler provided with low-energy-consumption flue gas waste heat recovery device |
-
2008
- 2008-09-04 CN CNA2008101193720A patent/CN101349511A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105258145A (en) * | 2015-11-13 | 2016-01-20 | 江苏绿叶锅炉有限公司 | Flue type waste heat boiler |
| CN106091705A (en) * | 2016-06-15 | 2016-11-09 | 山东钢铁股份有限公司 | A kind of improve the method and apparatus that sintering waste heat utilizes cluster generated energy |
| CN111966054A (en) * | 2020-07-15 | 2020-11-20 | 国家能源集团宁夏煤业有限责任公司 | Whole-plant large-scale interlocking protection method and device for chemical device |
| CN111966054B (en) * | 2020-07-15 | 2023-10-13 | 国家能源集团宁夏煤业有限责任公司 | Large-scale interlocking protection method and device for chemical plant |
| CN116678007A (en) * | 2023-05-26 | 2023-09-01 | 昌吉学院 | Boiler provided with low-energy-consumption flue gas waste heat recovery device |
| CN116678007B (en) * | 2023-05-26 | 2024-03-08 | 昌吉学院 | Boiler provided with low-energy-consumption flue gas waste heat recovery device |
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Open date: 20090121 |