CN201772439U - Device for overheating steam in waste heat boiler of cooling machine - Google Patents
Device for overheating steam in waste heat boiler of cooling machine Download PDFInfo
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- CN201772439U CN201772439U CN2010202215236U CN201020221523U CN201772439U CN 201772439 U CN201772439 U CN 201772439U CN 2010202215236 U CN2010202215236 U CN 2010202215236U CN 201020221523 U CN201020221523 U CN 201020221523U CN 201772439 U CN201772439 U CN 201772439U
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- waste heat
- heat boiler
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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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Abstract
The utility model discloses a device for overheating steam in a waste heat boiler of a cooling machine, which comprises a chimney, a main shaft blower, a sintering machine, a dust remover for a large chimney flue, a cooling machine, a dust remover for the cooling machine, a sintering machine for the large chimney flue, a waste heat boiler for the cooling machine, a heat exchanger for sintered flue gas, a heat user and the like. The device is characterized in that the heat exchanger for the sintered flue gas is additionally arranged between the waste heat boiler for the cooling machine and the dust remover for sintered flue gas. As the heat exchanger for the sintered flue gas is additionally arranged between the waste heat boiler for the cooling machine and the dust remover for sintered flue gas, the device provided by the utility model can improve the quantity and quality of the steam at the outlet of the waste heat boiler; and meanwhile, the temperature of the steam at the inlet of the heat exchanger is greatly higher than that of acid dew point of the sintered flue gas, so that low temperature corrosion generated during the heat exchange can be also avoided.
Description
Technical field
The utility model relates to steel industry sintering process UTILIZATION OF VESIDUAL HEAT IN field, and particularly a kind of sintering machine tail fume afterheat that utilizes carries out overheated device to steam of cooler waste heat boiler.
Background technology
Steel industry is one of branch of industry of energy resource consumption maximum, and the sintering circuit energy consumption accounts for 10% of total energy consumption in the steel manufacture process, is only second to the ironmaking operation, occupies second.Residual heat resources mainly are made up of two parts in the sintering process: the sintering deposit sensible heat from cooler is that cooling exhaust and the sintered discharge gas sensible heat that comes from sintering machine are sintered discharge gas.The temperature of cooling exhaust is along with not coexisting of the type of cooling and cooler position changes (place is the highest to the ore deposit, unloads the ore deposit and locates minimum) between 100～450 ℃, and its sensible heat accounts for about 30% of sintering overall heat consumption.When sintering process proceeds at last, the sinter fume temperature obviously rises, and the waste gas that the tail bellows are discharged can reach 300～400 ℃, and oxygen content can reach 18～20%, and this part sintered discharge gas sensible heat accounts for 20% of sintering overall heat consumption.Therefore this two parts waste heat amount quantity is very big, reclaims this two parts heat and can reduce production costs and can produce environment protecting.
Because the cooling exhaust major part is made up of air, after the process deduster carries out dedusting, almost there are not corrosive gas and impurity, so domestic a lot of sintering plant all utilizes the high temperature cooling exhaust, enter waste heat boiler and produce steam, but because this part EGT and flow are not very high, so it is low to enter the steam superheat that produces behind the waste heat boiler, quality is not high, and steam flow is little, if use this part steam-electric power, since the acting ability of steam, the steam consumption height of generating, generated output is low, less economical, if incorporate pipe network into because the poor quality of steam also can have influence on economy.And 300～400 ℃ of sinter fumes of sintering machine tail, because the quantity of flue gas is less, and quality is lower, and the composition more complicated, wherein contains SO
2, NO
XAnd impurity such as dust, directly this part heat is reclaimed in influence, so domestic a lot of sintering plant does not utilize this part heat, and direct the mixing by large flue with low-temperature sintering waste gas directly discharges, and not only wasted heat energy but also contaminated environment.Even adopted the sintering waste heat boiler to reclaim this part heat, but increased the sinter fume waste heat boiler, equipment cost is increased, complex process, and owing to wherein have SO
2, NO
XDeng corrosive gas, must produce cold end corrosion, according to relevant bibliographical information, after the waste heat boiler low temperature heating surface generation cold end corrosion, the pin rib of cold end corrosion place corrodes into φ 1.5 by φ 6, the lost of life that also can make air preheater after the station boiler generation cold end corrosion is to 4-5, and also can cause stifled ash after the generation cold end corrosion, and flue gas resistance is increased severely (can increase more than 1-2 times), make the blower fan overload, limit boiler output and shortened the cycle of operation, even being forced to blowing out, seriously corroded then causes pipe perforation, refrigerant leakage, so security and economy that cold end corrosion has seriously influenced boiler operatiopn take place
But the sensible heat entrained owing to sintered discharge gas is very big, can be also considerable for the heat that reclaims.If utilize this part heat to improve parameter and flow that the cold waste heat boiler of ring produces steam, thereby improve the generated energy of steam turbine or supply with the more high-quality steam of hot user, can reduce the production cost of iron and steel enterprise greatly, and make in the process of utilizing and cold end corrosion can not take place, produce remarkable economic efficiency and environment protecting.Therefore make full use of quality and the quantity that this part sintered discharge gas sensible heat improves the generation steam of waste heat boiler very big prospect is arranged.
Summary of the invention
In order to make full use of the waste heat of this part sintered discharge gas, improve quality and quantity that waste heat boiler produces steam, proposed a kind of steam of cooler waste heat boiler to be carried out overheated device.
The technical solution of the utility model
A kind of steam of cooler waste heat boiler is carried out overheated device, comprise chimney 1, main shaft blower fan 2, sintering machine 3, sintering machine tail exhanst gas outlet (7), large flue deduster 4, cooler 5, cooler deduster 6, sinter fume outlet bypass valve 8, sintering machine large flue 9, sinter fume deduster 10, cooler waste heat boiler 11, direct-contact desuperheater 14, sinter fume heat exchanger 15, hot user 17, circulating fan 18, air blast 19, standby fan 23;
Have gas approach 20, exhanst gas outlet 21, steam inlet 13 on the described flue gas heat exchange device 15, steam (vapor) outlet 16;
Wherein the inlet of air blast 19 links to each other with atmosphere, and outlet links to each other with the inlet of cooler 5, cooler deduster 6, cooler waste heat boiler 11 successively;
The exhanst gas outlet of cooler waste heat boiler 11 links to each other with the inlet of circulating fan 18, and the outlet of circulating fan 18 is with the outlet of standby fan 23 and link the high temperature section 24 of cooler 5, and the outlet of air blast 19 links to each other with the middle-temperature section 25 of cooler 5; The import of standby fan 23, air blast 19 directly communicates with atmosphere respectively;
The outlet of the high temperature section 24 of cooler 5 communicates with the inlet of cooler waste heat boiler 11 by cooler deduster 6 backs;
The steam (vapor) outlet 12 process direct-contact desuperheaters 14 of cooler waste heat boiler 11 link to each other with the steam inlet 13 on the flue gas heat exchange device 15;
The tail exhanst gas outlet 7 of described sintering machine 3 links to each other with the inlet of knot smoke duster 10, and the outlet of smoke duster 10 links to each other with gas approach 20 on the sinter fume heat exchanger 15 by pipeline, and sintering machine tail exhanst gas outlet 7 also links to each other with the big flue gas 9 of sintering machine by the valve 8 of bypass in addition;
After the exhanst gas outlet 21 of described sinter fume heat exchanger 15 directly converged with sintering machine large flue 9 by pipeline, more successively through cigarette large flue deduster 4, main shaft blower fan 2 then linked to each other with chimney 1;
The steam (vapor) outlet 16 of sinter fume heat exchanger 15 links to each other with hot user 17;
Hot user 17 wherein can be that steam turbine generator also can be a heating network.
The utility model beneficial effect
Of the present utility modelly a kind of steam of cooler waste heat boiler is carried out overheated device, with respect to the independent cooling residual heat boiler of traditional mode or independent cooling residual heat boiler+tail waste heat boiler, owing between cooler waste heat boiler and sinter fume deduster, increase the sinter fume heat exchanger or the tail waste heat boiler replaced with the sinter fume heat exchanger, can improve the effect of heat boiler outlet quantity of steam and quality, simultaneously because the heat exchanger inlet steam temperature is far longer than the acid dew-point temperature of sinter fume, can avoid the cold end corrosion that produces in the heat transfer process, and when heat exchanger breaks down, sintered discharge gas can be switched to the bypass operation, not influence the operate as normal of device.
Description of drawings
Fig. 1, a kind of steam of cooler waste heat boiler is carried out overheated device
The specific embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Embodiment 1
A kind of steam of cooler waste heat boiler is carried out overheated device as shown in Figure 1.
A kind of steam of cooler waste heat boiler is carried out overheated device, comprise chimney 1, main shaft blower fan 2, sintering machine 3, sinter fume outlet 7, large flue deduster 4, cooler 5, cooler deduster 6, sinter fume outlet bypass valve 8, sintering machine large flue 9, sinter fume deduster 10, cooler waste heat boiler 11, direct-contact desuperheater 14, sinter fume heat exchanger 15, hot user 17, circulating fan 18, air blast 19, standby fan 23;
Have gas approach 20, exhanst gas outlet 21, steam inlet 13 on the described sinter fume heat exchanger 15, steam (vapor) outlet 16;
The exhanst gas outlet of cooler waste heat boiler 11 links to each other with the inlet of circulating fan 18, and the outlet of circulating fan 18 is with the outlet of standby fan 23 and link the high temperature section 24 of cooler 5;
The inlet of standby fan 23, air blast 19 directly communicates with atmosphere respectively;
The outlet of air blast 19 links to each other with the middle-temperature section 25 of cooler 5, and the outlet of cooler 5 communicates with the inlet of cooler waste heat boiler 11 by cooler deduster 6 backs;
Steam (vapor) outlet 12 on the cooler waste heat boiler 11 links to each other through the steam inlet 13 that has on direct-contact desuperheaters 14 and the sinter fume heat exchanger 15;
The sinter fume of described sintering machine 3 outlet 7 links to each other with the inlet of sinter fume deduster 10, and the outlet of sinter fume deduster 10 links to each other with gas approach 20 on the sinter fume heat exchanger 15 by pipeline, and sinter fume outlet 7 also links to each other with sintering machine large flue 9 by the valve 8 of bypass in addition;
After the exhanst gas outlet 21 of described sinter fume heat exchanger 15 directly converged with sintering machine large flue 9 by pipeline, more successively through cigarette large flue deduster 4, main shaft blower fan 2 then linked to each other with chimney 1;
The steam (vapor) outlet 16 of sinter fume heat exchanger 15 links to each other with hot user 17.
Above said content only is the basic explanation under the utility model design, and according to any equivalent transformation that the technical solution of the utility model is done, all should belong to protection domain of the present utility model.
Claims (2)
1. one kind is carried out overheated device to steam of cooler waste heat boiler, comprises chimney (1), main shaft blower fan (2), sintering machine (3), large flue deduster (4), cooler (5), cooler deduster (6), sintering machine tail exhanst gas outlet (7), sinter fume outlet bypass valve (8), sintering machine large flue (9), sinter fume deduster (10), cooler waste heat boiler (11), direct-contact desuperheater (14), hot user (17), circulating fan (18), air blast (19), standby fan (23);
It is characterized in that also comprising sinter fume heat exchanger (15);
Have gas approach (20), exhanst gas outlet (21), steam inlet (13) on the described sinter fume heat exchanger (15), steam (vapor) outlet (16);
The exhanst gas outlet of cooler waste heat boiler (11) links to each other with the inlet of circulating fan (18), and the outlet of circulating fan (18) is with the outlet of standby fan (23) and link the high temperature section (24) of cooler (5);
The inlet of standby fan (23), air blast (19) directly communicates with atmosphere respectively;
The outlet of air blast (19) links to each other with the middle-temperature section (25) of cooler (5);
The outlet of the high temperature section (24) of cooler (5) communicates with the inlet of cooler waste heat boiler (11) by cooler deduster (6) back;
Steam (vapor) outlet (12) the process direct-contact desuperheater (14) of cooler waste heat boiler (11) links to each other with the heat exchanger steam inlet (13) on the flue gas heat exchange device (15);
Tail exhanst gas outlet (7) on the described sintering machine (3) links to each other with the inlet of sinter fume deduster (10), and the outlet of sinter fume deduster (10) links to each other with the gas approach (20) of sinter fume heat exchanger (15) by pipeline, and sintering machine tail exhanst gas outlet (7) also links to each other with sintering machine large flue (9) by the valve (8) of bypass in addition;
Exhanst gas outlet (21) on the described sinter fume heat exchanger (15), links to each other with chimney (1) behind cigarette large flue deduster (4), main shaft blower fan (2) directly and after sintering machine large flue (9) converges successively by pipeline again;
The steam (vapor) outlet (16) of sinter fume heat exchanger (15) links to each other with hot user (17).
2. as claimed in claim 1ly a kind of steam of cooler waste heat boiler is carried out overheated device, it is characterized in that described hot user (17) is steam turbine generator or heating network.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202215236U CN201772439U (en) | 2010-06-10 | 2010-06-10 | Device for overheating steam in waste heat boiler of cooling machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202215236U CN201772439U (en) | 2010-06-10 | 2010-06-10 | Device for overheating steam in waste heat boiler of cooling machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201772439U true CN201772439U (en) | 2011-03-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202215236U Expired - Lifetime CN201772439U (en) | 2010-06-10 | 2010-06-10 | Device for overheating steam in waste heat boiler of cooling machine |
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| CN (1) | CN201772439U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102997697A (en) * | 2012-12-12 | 2013-03-27 | 武汉钢铁(集团)公司 | Sinter waste-heat utilization process based on purification of sintering flue gas |
-
2010
- 2010-06-10 CN CN2010202215236U patent/CN201772439U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102997697A (en) * | 2012-12-12 | 2013-03-27 | 武汉钢铁(集团)公司 | Sinter waste-heat utilization process based on purification of sintering flue gas |
| CN102997697B (en) * | 2012-12-12 | 2014-08-27 | 武汉钢铁(集团)公司 | Sinter waste-heat utilization process based on purification of sintering flue gas |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110323 Effective date of abandoning: 20120509 |