CN202382593U - Device for recovering flue gas waste heat of electric furnace - Google Patents
Device for recovering flue gas waste heat of electric furnace Download PDFInfo
- Publication number
- CN202382593U CN202382593U CN2011205425226U CN201120542522U CN202382593U CN 202382593 U CN202382593 U CN 202382593U CN 2011205425226 U CN2011205425226 U CN 2011205425226U CN 201120542522 U CN201120542522 U CN 201120542522U CN 202382593 U CN202382593 U CN 202382593U
- Authority
- CN
- China
- Prior art keywords
- electric furnace
- sliding sleeve
- waste heat
- flue gas
- flue
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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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
- Y02P10/20—Recycling
-
- 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
Abstract
The utility model discloses a device for recovering flue gas waste heat of an electric furnace. The device comprises a sliding sleeve arranged at a flue gas outlet and an evaporation cooling system and is characterized in that the sliding sleeve is provided with a water feeding header and a water return header and is connected with the evaporation cooling system. According to the device disclosed by the utility model, the sliding sleeve is provided with the water feeding header and the water return header and is connected with the evaporation cooling system; the air mixed volume is controlled by moving the sliding sleeve, so that the recovery rate of the flue gas waste heat of the electric furnace is increased, the total amount of flue gas can be reduced and further the construction expenses and the operation expenses of the device for recovering the flue gas waste heat are reduced and the reduction of the production cost is facilitated.
Description
Technical field
The utility model relates to a kind of flue gas retracting device, relates in particular to a kind of electric furnace fume residual heat recycle device.
Background technology
In the electric furnace smelting process, flue gas of electric furnace is extracted out from its furnace roof, and flue-gas temperature is higher, and contains composition such as a certain amount of CO, has the value of waste heat recovery.Particularly the hot metal ratio in the electric furnace increases in recent years, and the concentration of CO all increases in exhaust gas volumn, temperature and the flue gas, and the meaning that reclaims the electric furnace flue gas waste heat further increases.
The combustion settling chamber of existing electric furnace and later part thereof adopt the evaporated cooling system recovery waste heat, but sliding sleeve and bent tube section still adopt water-cooled, and the waste heat of this part does not obtain reclaiming, and therefore, waste heat recovery efficient is not high.For guarantee to the cooling effect of electric furnace flue gas with receive the restriction of waste heat boiler to temperature, existing electric furnace flue gas adopts big mode of mixing air quantity usually, its excess air coefficient surpasses 1.5 usually; Even reach more than 2; Big mode of mixing air quantity increases the flue gas total amount, and temperature reduces, and is unfavorable for flue gas waste heat recovery; And strengthened the load of ventilating and purifying air system, the energy consumption of dedusting main air blower is higher.
The utility model content
The purpose of the utility model is to provide a kind of flue gas waste heat recovery efficient high electric furnace fume residual heat recycle device.
The purpose of the utility model is achieved in that a kind of electric furnace fume residual heat recycle device, comprises the sliding sleeve and the evaporated cooling system that are arranged on exhanst gas outlet, it is characterized in that: said sliding sleeve is provided with water-inlet header and is connected with the backwater header and with evaporated cooling system.
Mix air quantity in order to control better, above-mentioned sliding sleeve is the packaged type sliding sleeve, and the electric furnace fire door is provided with the fume component analysis device, and said sliding sleeve can move the gap of regulating between sliding sleeve and the electric furnace fire door according to smoke components.This device utilizes sliding sleeve to move and can the excess air system of electric furnace flue gas be controlled between 1.1 ~ 1.5, guarantees CO after-flame in the electric furnace flue gas, makes simultaneously that the electric furnace flue gas temperature is higher, exhaust gas volumn is less, is convenient to waste heat recovery.Compare greater than 1.5 mixed wind mode with Traditional use excess air system, this device can make the flue-gas temperature of combustion settling chamber the inside heat of oxidation 1500
oMore than the C, theoretical temperature combustion reaches as high as 2000
oC, the higher parameter that can improve the steam of waste-heat recovery device generation of flue-gas temperature, and the after-flame of assurance CO.Compare greater than 1.5 mixed wind mode with Traditional use excess air system, this device can make the flue gas total amount reduce more than 20%, and equipment such as flue, waste heat boiler can be done forr a short time, and sack cleaner, blower fan etc. also can be littler, and fan energy consumption reduces.
In order better to adapt to higher flue-gas temperature, make the stable and raising heat exchange effect of heat exchange efficiency, above-mentioned electric furnace fume residual heat recycle device also comprises waste heat boiler, said waste heat boiler adopts tubular heat exchanger or heat-pipe heat exchanger
In order to overcome the thermal stress that the electric furnace flue gas cyclically-varying causes, above-mentioned waste heat boiler is connected with combustion settling chamber through connecting flue, and said connection flue is provided with expansion joint.
Because the electric furnace flue gas dustiness is higher, in order in time to remove the flue dust on the heat exchanger, reduce the influence of heat exchanging effect, above-mentioned waste heat boiler is provided with the mechanical type vibrator.
The utlity model has following beneficial effect; The sliding sleeve of the utility model is provided with water-inlet header and is connected with the backwater header and with evaporated cooling system, moves control through sliding sleeve and mixes air quantity, has not only improved electric furnace flue gas waste heat recovery rate; And can reduce the flue gas total amount; And then the construction cost and the operating cost of minimizing flue gas waste heat recovery apparatus, reduce the blower fan power consumption, help to reduce production costs.CO content is higher in the electric furnace furnace gas, when possessing recovery value when being blended into molten iron smelting (as), can also realize the recovery to electric furnace coal gas through the position of control sliding sleeve.
Description of drawings
Fig. 1 is the utility model example structure sketch map.
The specific embodiment
Embodiment; A kind of electric furnace fume residual heat recycle device; Comprise the sliding sleeve 1, evaporated cooling system and the waste heat boiler 8 that are arranged on exhanst gas outlet; Waste heat boiler 8 adopts tubular heat exchangers or heat-pipe heat exchanger and is provided with 14 ash disposal of mechanical type vibrator, and waste heat boiler 8 is connected with combustion settling chamber 4 through connecting flue 7, and connection flue 7 is provided with expansion joint 6.
Sliding sleeve 1 is provided with water-inlet header and is connected with the backwater header and with evaporated cooling system, and sliding sleeve is that packaged type sliding sleeve and electric furnace fire door are provided with the fume component analysis device, and sliding sleeve 1 can move the gap of regulating between sliding sleeve 1 and the electric furnace fire door according to smoke components.The flue gas that comes out from electric furnace furnace roof exhanst gas outlet passes through sliding sleeve 1, bend pipe 3, combustion settling chamber 4 successively, connects flue 7 and waste heat boiler 8, and recovery waste heat produced steam when flue gas was cooled; Sliding sleeve 1 can horizontally slip under the effect of hydraulic cylinder 2; Introduce an amount of air through the gap between sliding sleeve 1 and the exhanst gas outlet; The excess air coefficient of CO is 1.3 ± 0.2 behind the mixed wind of assurance, and 4 burnings in combustion settling chamber are provided with shoot door 5 deashings behind the mixed wind of flue gas on the combustion settling chamber 4.Combustion settling chamber 4 is connected with waste heat boiler 8 through connecting flue 7, and the connection flue is provided with expansion joint 6 and can absorbs the cyclical heat stress that the electric furnace flue gas variations in temperature causes.
Oxygen-eliminating device 10, low pressure recycle pump 11, sliding sleeve 1 and bend pipe 3 constitute the low pressure recycle system, and cooling water is squeezed in the oxygen-eliminating device 10 through softened water pump 9, get into drum 13 through feed pump 12 after the cooling water deoxygenation.Drum 13, combustion settling chamber 4, connection flue 7 and waste heat boiler 8 are formed the cycle of higher pressure systems and are adopted natural circulation mode.Can move to left sliding sleeve 1 heat of oxidation at electric furnace, reduces the air capacity of sneaking into, and the CO in the electric furnace flue gas can not lighted by mixed wind, can reclaim electric furnace coal gas after the cooling.
Claims (6)
1. an electric furnace fume residual heat recycle device comprises the sliding sleeve (1) and the evaporated cooling system that are arranged on exhanst gas outlet, it is characterized in that: said sliding sleeve (1) is provided with water-inlet header and is connected with the backwater header and with evaporated cooling system.
2. electric furnace fume residual heat recycle device as claimed in claim 1; It is characterized in that: said sliding sleeve (1) is for packaged type sliding sleeve and electric furnace fire door are provided with the fume component analysis device, and said sliding sleeve (1) can move the gap of regulating between sliding sleeve (1) and the electric furnace fire door according to smoke components.
3. according to claim 1 or claim 2 electric furnace fume residual heat recycle device, it is characterized in that: also comprise waste heat boiler (8), said waste heat boiler (8) adopts tubular heat exchanger or heat-pipe heat exchanger.
4. electric furnace fume residual heat recycle device as claimed in claim 3 is characterized in that its waste heat boiler (8) is provided with mechanical type vibrator (14).
5. electric furnace fume residual heat recycle device as claimed in claim 3 is characterized in that: said waste heat boiler (8) is connected with combustion settling chamber (4) through connecting flue (7), and said connection flue (7) is provided with expansion joint (6).
6. electric furnace fume residual heat recycle device as claimed in claim 4 is characterized in that: said waste heat boiler (8) is connected with combustion settling chamber (4) through connecting flue (7), and said connection flue (7) is provided with expansion joint (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205425226U CN202382593U (en) | 2011-12-22 | 2011-12-22 | Device for recovering flue gas waste heat of electric furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205425226U CN202382593U (en) | 2011-12-22 | 2011-12-22 | Device for recovering flue gas waste heat of electric furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202382593U true CN202382593U (en) | 2012-08-15 |
Family
ID=46631090
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205425226U Expired - Lifetime CN202382593U (en) | 2011-12-22 | 2011-12-22 | Device for recovering flue gas waste heat of electric furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202382593U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103759545A (en) * | 2014-01-21 | 2014-04-30 | 无锡三达环保科技有限公司 | Smoke medium and high temperature waste heat positive energy recycling and dust removing system of AOD furnace |
-
2011
- 2011-12-22 CN CN2011205425226U patent/CN202382593U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103759545A (en) * | 2014-01-21 | 2014-04-30 | 无锡三达环保科技有限公司 | Smoke medium and high temperature waste heat positive energy recycling and dust removing system of AOD furnace |
| CN103759545B (en) * | 2014-01-21 | 2016-03-02 | 无锡三达环保科技有限公司 | AOD furnace flue dust senior middle school temperature waste heat just can be recycled and dust pelletizing system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120815 |
|
| CX01 | Expiry of patent term |