CN104421955A - Three-dimensional internal and external finned tube integrated air preheater and processing method thereof - Google Patents
Three-dimensional internal and external finned tube integrated air preheater and processing method thereof Download PDFInfo
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- CN104421955A CN104421955A CN201310366492.1A CN201310366492A CN104421955A CN 104421955 A CN104421955 A CN 104421955A CN 201310366492 A CN201310366492 A CN 201310366492A CN 104421955 A CN104421955 A CN 104421955A
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- air
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- air preheater
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
The invention discloses a three-dimensional internal and external finned tube integrated air preheater and a smoke processing method thereof. The three-dimensional internal and external finned tube integrated air preheater comprises a vertical case, the upper end and the lower end of the case are provided with flue ports including an flue inlet and a flue outlet respectively; the inside of the case close to the flue ports is provided with tube plates to close the case and separate the inside and the flue ports; a plurality of three-dimensional internal and external finned tubes are welded to the tube plates at the upper end and the lower end in an expanded mode and fixed inside the case; the orifices of the three-dimensional internal and external finned tubes are arranged inside the flue ports; one side of the case is provided with an air inlet, and the other side of the case is provided with an air outlet. The three-dimensional internal and external finned tube integrated air preheater integrates an air preheater and a GGH (gas-gas heater) into a whole, thereby reducing equipment investment, saving equipment space, achieving integration and solving the problems of low heat exchange efficiency, heat transfer surface acid corrosion, scale formation, clogging and the like of existing devices. Most of preheated high-temperature air is applied to combustion of a boiler, the other part of the high-temperature air is mixed with purified flue gas flowing out of a desulfurizing tower, and the temperature of the mixed purified flue gas can be up to environment protecting emission standard.
Description
Technical field
The present invention relates to the air preheater for boiler of power plant heat exchange, be specially three-dimensional inside and outside ribbed pipe integrated air air preheater.
Background technology
Boiler of power plant flue gas flow, denitration → air preheater → electrostatic fabric filter → booster fan → gas one gas heat exchanger (being called for short GGH) → desulfurizing tower → GGH → chimney, the air preheater in flow process generally adopts spiral groove pipe air preheater, light pipe air preheater, heat-pipe air preheater or rotary regenerative air preheater.Air themperature is elevated to 240 ~ 300 DEG C by 20 DEG C by air preheater, and flue-gas temperature drops to 140 ~ 150 DEG C by 290 ~ 350 DEG C.In flue gas flow, GGH heat transmission equipment enters desulfurizing tower desulfurization by after former flue gas cooling, and the flue gas after desulfurization is called neat stress, then the neat stress obtained is sent into GGH heating.There is following problem in wherein used air preheater and GGH: heat transfer coefficient is on the low side, and the heat-transfer surface being in low-temperature zone exists acid corrosion, fouling and stifled ash, and floor space is large, takes up room many.Rotary air preheater air leak.
Summary of the invention
The present invention, for solving the problem, improves security and economy, the reduction operation expense of equipment, adopts the three-dimensional inside and outside ribbed pipe technology of variable density, provides a kind of integrated air air preheater, replace air preheater and GGH.
The solution of the present invention is as follows: three-dimensional inside and outside ribbed pipe integrated air air preheater, comprise vertical cabinet, casing upper/lower terminal is provided with floss hole, upper end is flue entrance, lower end is flue outlet, tube sheet is provided with inside floss hole, by bin enclosure, cut off box house and floss hole, inside and outside many three-dimensionals, ribbed pipe expanded and welded tube joint is on the tube sheet of upper/lower terminal, is fixed in casing, and the mouth of pipe of three-dimensional inside and outside ribbed pipe is arranged in floss hole, one side of casing is provided with air intake, and another side is provided with air outlet slit.
Inside and outside described three-dimensional, ribbed steel tube is inside and outside is provided with the fin be triangularly arranged.
Described air intake is positioned on the body side inside tube sheet, near flue outlet.
Described air outlet slit is positioned on the body side inside tube sheet, near flue entrance.
Described air outlet slit and air intake are positioned at the not ipsilateral of casing.
Use three-dimensional inside and outside ribbed pipe integrated air air preheater, flue-gas treater flow sequence is followed successively by denitration, enters air preheater, then enters electrostatic fabric filter, enters booster fan, enters desulfurizing tower, finally discharges from chimney.
Air is through three-dimensional inside and outside ribbed pipe integrated air air preheater, and the most of high temperature air obtained is for boiler combustion, and the neat stress that remainder flows out with desulfurizing tower mixes, and makes mixed neat stress temperature reach environmental emission standard.In three-dimensional inside and outside ribbed pipe integrated air air preheater, flue gas, at three-dimensional inside and outside rib Bottomhole pressure, flows in the casing of air outside pipe, the flow direction contrary of air and flue gas.
Advantage of the present invention: adopt the three-dimensional inside and outside ribbed pipe coefficient of heat transfer high, compare raising 2.5 ~ 6 times with light pipe, manufacturing preheater with this pipe fitting can reduce equipment volume, and variable density rib technology can solve heat-transfer surface acid corrosion, fouling and stifled grey problem.Use the air preheater on displacement boiler of power plant back-end ductwork of the present invention, cancel GGH heat transmission equipment, air preheater and GGH two kinds of equipment are united two into one, reduce equipment investment, save the device space, realize integration, solve that original equipment heat exchange efficiency is low, heat-transfer surface acid corrosion, the problem such as fouling and stifled ash; The most of high temperature air obtained after preheating is for boiler combustion, and the neat stress that remainder flows out with desulfurizing tower mixes, and makes mixed neat stress temperature reach environmental emission standard.This integrated air air preheater also can be used for the gas one gas heat exchange in the fields such as the energy, oil, chemical industry, power, atomic energy, metallurgy, medicine, food, light industry.
Accompanying drawing explanation
Fig. 1 is three-dimensional inside and outside ribbed pipe integrated air air preheater structural representation;
Fig. 2 is three-dimensional inside and outside ribbed pipe structural representation;
Fig. 3 is the flue gas flow figure adopting conventional air preheater;
Fig. 4 is the present embodiment flue gas flow figure;
Wherein 1---casing, 2---side plate, 3---three-dimensional inside and outside ribbed pipe, 4---upper perforated plate, 5---lower perforated plate, 6---flue entrance, 7---flue outlet, 8---air intake, 9---air outlet slit, 10---fin.
Detailed description of the invention
Below in conjunction with specific embodiment and Figure of description, the invention will be further described.Specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
Embodiment: as shown in Figure 1, integrated air air preheater, its main body is three-dimensional casing, casing upper end arranges flue entrance, lower end arranges flue outlet, in the casing near cigarette entrance, be provided with upper perforated plate closed box, in the casing near cigarette outlet, be provided with lower perforated plate closed box, box house and flue entry and exit are kept apart.Tube sheet is provided with multiple installing hole, and each installing hole inserts ribbed pipe inside and outside a three-dimensional.Three-dimensional inside and outside ribbed pipe expanded and welded tube joint, on the tube sheet of upper/lower terminal, is fixed in casing, and the mouth of pipe of three-dimensional inside and outside ribbed pipe is arranged in floss hole.The side plate of casing is provided with air intake, is positioned on the box side inside tube sheet, near flue outlet; Another side plate is provided with air outlet slit, is positioned on the box side inside tube sheet, near flue entrance.
As described in Figure 2, the pipe of three-dimensional inside and outside ribbed pipe is inside and outside is provided with the fin be triangularly arranged.Three-dimensional inside and outside ribbed pipe adopts and cuts inner rib plate and cut the processing of outer fin two procedures and formed.Body can adopt commercial copper pipe, aluminum pipe, carbon steel pipe, stainless steel tube, embryonic tube size range is Ф 50 × 2 ~ Ф 102 × 2mm, inner surface through a procedure machining is triangularly arranged fin, outer surface through two procedure machining is triangularly arranged fin, obtains designing ribbed pipe pipe fitting inside and outside the three-dimensional that needs.
As shown in Figure 3, adopt conventional air preheater, boiler of power plant flue gas flow, denitration → air preheater → electrostatic fabric filter → booster fan → gas one gas heat exchanger (being called for short GGH) → desulfurizing tower → GGH → chimney.
As schematically shown in Figure 4, integrated air air preheater is used, boiler of power plant flue gas flow: denitration → air preheater → electrostatic fabric filter → booster fan → desulfurizing tower → chimney.Eliminate GGH heat transmission equipment, air preheater and GGH two kinds of equipment are united two into one, realize integration.Air is through integrated air air preheater, and the most of high temperature air obtained is for boiler combustion, and the neat stress that remainder flows out with desulfurizing tower mixes, and makes mixed neat stress temperature reach environmental emission standard.In integrated air air preheater, flue gas, at three-dimensional inside and outside rib Bottomhole pressure, flows in the casing of air outside pipe, the flow direction contrary of air and flue gas.
This integrated air air preheater has feature:
1) adopt variable density rib technology to regulate wall surface temperature, solve heat-transfer surface acid corrosion, fouling and stifled grey problem, improve device security and economy, reduction operation expense, extension device service life.
2) integrated air air preheater compares with light pipe air preheater, can improve heat exchange amount 4 times, improves heat exchange efficiency 45%, saves material more than 40%, reduces air preheater volume, saves floor space and space.
3) integrated air preheater flue gas is different with conventional air preheater from the type of flow of air, the conventional air preheater type of flow is generally cross-current or mixed flow, integrated air preheater flue gas and air flow are pure counter-current flow mode, and the heat transfer temperature difference adverse current of three kinds of types of flow is maximum.
Claims (8)
1. three-dimensional inside and outside ribbed pipe integrated air air preheater, comprise vertical cabinet, it is characterized in that: casing upper/lower terminal is provided with floss hole, upper end is flue entrance, lower end is flue outlet, tube sheet is provided with inside floss hole, by bin enclosure, cut off box house and floss hole, inside and outside many three-dimensionals, ribbed pipe expanded and welded tube joint is on the tube sheet of upper/lower terminal, is fixed in casing, and the mouth of pipe of three-dimensional inside and outside ribbed pipe is arranged in floss hole, one side of casing is provided with air intake, and another side is provided with air outlet slit.
2. ribbed pipe integrated air air preheater inside and outside three-dimensional according to claim 1, is characterized in that: inside and outside described three-dimensional, ribbed steel tube is inside and outside is provided with the fin be triangularly arranged.
3. ribbed pipe integrated air air preheater inside and outside three-dimensional according to claim 1, is characterized in that: described air intake is positioned on the body side inside tube sheet, near flue outlet.
4. ribbed pipe integrated air air preheater inside and outside three-dimensional according to claim 1, is characterized in that: described air outlet slit is positioned on the body side inside tube sheet, near flue entrance.
5. ribbed pipe integrated air air preheater inside and outside three-dimensional according to claim 1, is characterized in that: described air outlet slit and air intake are positioned at the not ipsilateral of casing.
6. three-dimensional inside and outside ribbed pipe integrated air air preheater processing method, is characterized in that: flue-gas treater flow sequence is followed successively by denitration, enters air preheater, then enters electrostatic fabric filter, enters booster fan, enters desulfurizing tower, finally discharges from chimney.
7. processing method according to claim 6, it is characterized in that: air is through three-dimensional inside and outside ribbed pipe integrated air air preheater, the most of high temperature air obtained is for boiler combustion, the neat stress that remainder flows out with desulfurizing tower mixes, and makes mixed neat stress temperature reach environmental emission standard.
8. processing method according to claim 6, is characterized in that: in three-dimensional inside and outside ribbed pipe integrated air air preheater, and flue gas, at three-dimensional inside and outside rib Bottomhole pressure, flows in the casing of air outside pipe, the flow direction contrary of air and flue gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310366492.1A CN104421955A (en) | 2013-08-21 | 2013-08-21 | Three-dimensional internal and external finned tube integrated air preheater and processing method thereof |
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| CN201310366492.1A CN104421955A (en) | 2013-08-21 | 2013-08-21 | Three-dimensional internal and external finned tube integrated air preheater and processing method thereof |
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| CN104421955A true CN104421955A (en) | 2015-03-18 |
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| CN201310366492.1A Pending CN104421955A (en) | 2013-08-21 | 2013-08-21 | Three-dimensional internal and external finned tube integrated air preheater and processing method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105833688A (en) * | 2016-05-06 | 2016-08-10 | 山东岱荣节能环保科技有限公司 | Energy-saving clean emission device for coke oven underground flue gas |
| CN107376604A (en) * | 2017-09-21 | 2017-11-24 | 重庆市商顺换热设备有限公司 | A kind of industrial fermentation waste gas dehumanization method and device |
| CN108361988A (en) * | 2018-03-27 | 2018-08-03 | 中国科学院广州能源研究所 | A kind of high efficiency boiler energy-saving control system and control method |
-
2013
- 2013-08-21 CN CN201310366492.1A patent/CN104421955A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105833688A (en) * | 2016-05-06 | 2016-08-10 | 山东岱荣节能环保科技有限公司 | Energy-saving clean emission device for coke oven underground flue gas |
| CN105833688B (en) * | 2016-05-06 | 2018-03-02 | 山东岱荣节能环保科技有限公司 | The energy-saving clean tapping equipment of coke oven underground flue gas |
| CN107376604A (en) * | 2017-09-21 | 2017-11-24 | 重庆市商顺换热设备有限公司 | A kind of industrial fermentation waste gas dehumanization method and device |
| CN108361988A (en) * | 2018-03-27 | 2018-08-03 | 中国科学院广州能源研究所 | A kind of high efficiency boiler energy-saving control system and control method |
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Application publication date: 20150318 |
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