CN201706527U - Combination air preheater - Google Patents
Combination air preheater Download PDFInfo
- Publication number
- CN201706527U CN201706527U CN2010202520633U CN201020252063U CN201706527U CN 201706527 U CN201706527 U CN 201706527U CN 2010202520633 U CN2010202520633 U CN 2010202520633U CN 201020252063 U CN201020252063 U CN 201020252063U CN 201706527 U CN201706527 U CN 201706527U
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- China
- Prior art keywords
- air preheater
- low
- heat
- temperature zone
- tube sheet
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- 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.)
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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 utility model discloses a combination air preheater, which comprises a high-temperature air preheater (2) and a low-temperature air preheater (1). The high-temperature air preheater (2) is connected to the upper portion of the low-temperature air preheater (1). The high-temperature air preheater (2) consists of a vertical post, an upper beam, a lower beam, tube plates and heat transfer pipes (8), the vertical post, the upper beam, the lower beam and the tube plates form a flue gas passage, the heat transfer pipes are disposed on the tube plates (7) on two sides of the flue gas passage, and a gas collection box (4) is disposed on the outer side of the tube plates. The low-temperature air preheater (1) consists of a vertical post, an upper beam, a lower beam and a heat exchanger portion, a gas collection box (4) is arranged on the outer side of the heat exchange portion, the heat transfer pipes are communicated with one another through the gas collection boxes, a hot flue gas inlet and a hot air outlet are arranged on the high-temperature air preheater, and a cold flue gas outlet and a cold air inlet are arranged on the low-temperature air preheater. The combination air preheater has the advantages of reliable operation, long service life, low exhausted smoke temperature, high heat efficiency and the like.
Description
Technical field
The utility model is mainly used in petroleum chemical industry; carrying out Waste Heat Recovery by the high-temperature flue gas that industrial furnaces such as boiler, heating furnace and waste gas catalytic incineration stove are produced with the used cold air heat exchange of burning, is the visual plant of realizing cutting down the consumption of energy, improving the thermal efficiency, energy savings, protection environment.
Background technology
At present the air preheater used of petrochemical industry all has certain deficiency, and traditional heat pipe preheater ubiquity that dust stratification is serious, maintenance cost is high, the time between overhauls(TBO) is long, metal consumption is big and problem such as bulky; The power consumption of swinging (heat accumulating type) air preheater, leak out, problem such as dust stratification coking and cold end corrosion is more serious; The shell and tube air preheater since low, the quality of heat transfer efficiency big and involve great expense in petrochemical equipment, use less.The thermal efficiency is the important technology index of weighing the heating furnace energy consumption.Therefore, improving the thermal efficiency of heating furnace, is an important ring that reduces energy consumption.In order to improve the thermal efficiency, reduce exhaust gas temperature, must effectively prevent dew point corrosion.
Summary of the invention
The purpose of this utility model provides a kind of combination type air preheater, problem such as be used to solve common bundled tube preheater low-temperature dew point corrosion, the time between overhauls(TBO) is long, dust stratification is serious, the thermal efficiency is low.
The technical scheme that the utility model is taked is: described air preheater comprises high temperature section air preheater and low-temperature zone air preheater two parts, and the high temperature section air preheater is connected low-temperature zone air preheater top; Described high temperature section air preheater is made of column, lower and upper cross-member, tube sheet and heat-transfer pipe, and column, lower and upper cross-member, tube sheet constitute exhaust gases passes, and heat-transfer pipe is arranged on the tube sheet of exhaust gases passes both sides, and the outside side of tube sheet is provided with plenum chamber; Described low-temperature zone air preheater is by column, lower and upper cross-member, and the heat exchanging part formation, and the arranged outside of heat exchanging part has plenum chamber; Be communicated with by plenum chamber between the described heat-transfer pipe; The high temperature section air preheater is provided with hot gas approach and hot air outlet, and the low-temperature zone air preheater is provided with cold flue gas outlet and inlet of cold air.
Sill on the described high temperature section air preheater is connected by bolt with entablature on the low-temperature zone air preheater.
Heat-transfer pipe on the described high temperature section air preheater is finned tube or studded tube.
Heat exchanging part on the described low-temperature zone air preheater is a drawer type tube bank modular structure, heat exchanging part is made of fixed head, tube sheet and heating surface bank, fixed head, tube sheet form flue, heating surface bank is arranged on the tube sheet, and heat exchanging part integral body is connected with column on the low-temperature zone air preheater by bolt.
Heat-transfer pipe on the described low-temperature zone air preheater is an enamel pipe.
Heat-transfer pipe in the low-temperature zone of the present utility model adopts enamel pipe energy dew-point corrosion resistant, smooth surface, and be not easy dust stratification, because low-temperature zone has adopted enamel pipe can effectively prevent low-temperature dew point corrosion, so the exhaust gas temperature of combination type air preheater can be reduced to below 110 ℃, the thermal efficiency of device can be significantly improved, and (generally the thermal efficiency of heating furnace with residual neat recovering system is about 88%; After using the utility model, the thermal efficiency can reach more than 93%); Described low-temperature zone adopts the convenient maintenance of drawer type institutional framework and changes, and has shortened the time of maintenance greatly; Low-temperature zone adopts water flushing soot cleaning system, and spray evenly can effectively be removed the dust stratification on enamel pipe surface.
Reliable, advantages such as the life-span is long, exhaust gas temperature is low, thermal efficiency height that combination type air preheater described in the utility model in sum has, the utility model can be widely used in petroleum chemical industry, for significant contribution is made in energy-saving and emission-reduction.
Description of drawings
Accompanying drawing 1 is a structural representation of the present utility model.
Accompanying drawing 2 is the structural representation of drawer type tube bank module
Accompanying drawing 3 is the connected node figure of drawer type tube bank module
Accompanying drawing 5 is the connection diagram between the module
Among the figure: 1, low-temperature zone air preheater, 2, the high temperature section air preheater, 3, the cold flue gas outlet, 4, plenum chamber, 5, drawer type tube bank module, 6, enamel pipe, 7, tube sheet, 8, heat-transfer pipe (finned tube, studded tube), 9, hot smoke inlet, 10, hot-air goes out, 11, cool air inlet, 12, column, 13, asbestos yarn, 14, bolt, 15, nut.
The specific embodiment
In conjunction with the accompanying drawings, specific embodiment of the utility model is described.
As shown in drawings: described air preheater comprises high temperature section air preheater 2 and low-temperature zone air preheater 1 two parts, and high temperature section air preheater 2 is connected low-temperature zone air preheater 1 top; Described high temperature section air preheater 2 is made of column 12, lower and upper cross-member, tube sheet 7 and heat-transfer pipe 8, column 12, lower and upper cross-member, tube sheet 7 constitute exhaust gases passes, heat-transfer pipe 8 on the high temperature section air preheater 2 is finned tube or studded tube, and present embodiment adopts finned tube.Heat-transfer pipe 8 is arranged on the tube sheet of exhaust gases passes both sides, and the outside side of tube sheet is provided with plenum chamber 4.Described low-temperature zone air preheater 1 is by column, lower and upper cross-member, and the heat exchanging part formation, and the arranged outside of heat exchanging part has plenum chamber 4; Heat exchanging part on the described low-temperature zone air preheater 1 is drawer type tube bank module 5 structures, heat exchanging part is made of fixed head, tube sheet and heating surface bank, fixed head, tube sheet form flue, heating surface bank is arranged on the tube sheet, and heat exchanging part integral body is connected with column on the low-temperature zone air preheater by bolt.Heat-transfer pipe on the described low-temperature zone air preheater is an enamel pipe 6.Sill on the high temperature section air preheater 2 is connected by bolt with entablature on the low-temperature zone air preheater 1.Be communicated with 4 by plenum chamber between the described heat-transfer pipe; The high temperature section air preheater is provided with hot gas approach 9 and hot air outlet 10, and the low-temperature zone air preheater is provided with cold flue gas outlet 3 and inlet of cold air 11.
As shown in Figure 1, hot flue gas enters the combination type air preheater from hot smoke inlet 9, discharges from cold flue gas outlet 3 through high temperature section air preheater 2 and low-temperature zone air preheater 1; Cold air enters the combination type air preheater from cool air inlet 11, discharges from hot air outlet 10 then through enamel pipe 6, plenum chamber 4, heat-transfer pipe 8 successively.Air is walked tube side (in the heat-transfer pipe), and flue gas is walked shell side (heat-transfer pipe is outer), carries out heat exchange by the tube wall of heat-transfer pipe (enamel pipe).
Accompanying drawing 2 is structural representations of drawer type tube bank module, enamel pipe 6 comes support fixation by tube sheet 7, form the tube bank module of an integral body, be connected by angle steel between drawer type tube bank module and the air preheater, syndeton such as accompanying drawing 3, angle steel in the drawer type tube bank module 5 is connected by bolt 14,15 with the column 12 of preheater, seals by asbestos yarn 13 between them.Join the bolt hole that is drilled with identical size on two end floor beams up and down of low-temperature zone air preheater 1 and high temperature section air preheater 2, see accompanying drawing 4, in the time of on high temperature section air preheater 2 is put into low-temperature zone air preheater 1, with bolt 14,15 sill of high temperature section air preheater 2 and the entablature of low-temperature zone air preheater 1 are fixed, the middle asbestos yarn 13 that adds seals, and sees accompanying drawing 5.
Because low-temperature zone air preheater 1 adopts enamel pipe 6 to carry out heat exchange, so can effectively prevent dew point corrosion, and the enamel pipe smooth outer surface, be difficult for dust stratification.
After equipment carries out long-term operation, the bolt that connects drawer type tube bank module 5 and column 12 in the accompanying drawing 3 can be taken down when needing maintenance and drawer type can be restrained module 5 whole extractions out, overhaul or change, integral body is put into preheater more afterwards, bolt on and get final product, so just shortened the time of maintenance greatly, for enterprise has won a large amount of economic benefits.
Claims (5)
1. combination type air preheater, it is characterized in that: described air preheater comprises high temperature section air preheater (2) and low-temperature zone air preheater (1) two parts, and high temperature section air preheater (2) is connected low-temperature zone air preheater (1) top; Described high temperature section air preheater (2) is made of column, lower and upper cross-member, tube sheet and heat-transfer pipe (8), column, lower and upper cross-member, tube sheet constitute exhaust gases passes, heat-transfer pipe (8) is arranged on the tube sheet (7) of exhaust gases passes both sides, and the outside side of tube sheet (7) is provided with plenum chamber (4); Described low-temperature zone air preheater is by column, lower and upper cross-member, and the heat exchanging part formation, and the arranged outside of heat exchanging part has plenum chamber (4); Be communicated with by plenum chamber between the described heat-transfer pipe; High temperature section air preheater (2) is provided with hot smoke inlet (9) and hot air outlet (10), and low-temperature zone air preheater (1) is provided with cold flue gas outlet (3) and cool air inlet (11).
2. combination type air preheater according to claim 1, it is characterized in that: the heat exchanging part on the described low-temperature zone air preheater is a drawer type tube bank modular structure, heat exchanging part is made of fixed head, tube sheet and heating surface bank, fixed head, tube sheet form flue, heating surface bank is arranged on the tube sheet, and heat exchanging part integral body is connected with column on the low-temperature zone air preheater by bolt.
3. combination type air preheater according to claim 1 is characterized in that: the heating surface bank on the described low-temperature zone air preheater is enamel pipe (6).
4. combination type air preheater according to claim 1 is characterized in that: the sill on the described high temperature section air preheater (2) is connected by bolt with entablature on the low-temperature zone air preheater (1).
5. combination type air preheater according to claim 1 is characterized in that: the heat-transfer pipe (8) on the described high temperature section air preheater is finned tube or studded tube.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN2010202520633U CN201706527U (en) | 2010-07-02 | 2010-07-02 | Combination air preheater |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2010202520633U CN201706527U (en) | 2010-07-02 | 2010-07-02 | Combination air preheater |
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CN201706527U true CN201706527U (en) | 2011-01-12 |
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CN2010202520633U Expired - Lifetime CN201706527U (en) | 2010-07-02 | 2010-07-02 | Combination air preheater |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102141253A (en) * | 2011-03-29 | 2011-08-03 | 深圳中兴节能环保股份有限公司 | Phase transition combined air preheater |
CN106482532A (en) * | 2016-11-26 | 2017-03-08 | 江苏江涛环境工程有限公司 | High-temperature flue gas cooling heat exchanger |
-
2010
- 2010-07-02 CN CN2010202520633U patent/CN201706527U/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102141253A (en) * | 2011-03-29 | 2011-08-03 | 深圳中兴节能环保股份有限公司 | Phase transition combined air preheater |
CN106482532A (en) * | 2016-11-26 | 2017-03-08 | 江苏江涛环境工程有限公司 | High-temperature flue gas cooling heat exchanger |
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Date | Code | Title | Description |
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C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
CX01 | Expiry of patent term | ||
CX01 | Expiry of patent term |
Granted publication date: 20110112 |