CN201210027Y - Heat-transfer pipe applying to air preheater - Google Patents
Heat-transfer pipe applying to air preheater Download PDFInfo
- Publication number
- CN201210027Y CN201210027Y CNU2008201164259U CN200820116425U CN201210027Y CN 201210027 Y CN201210027 Y CN 201210027Y CN U2008201164259 U CNU2008201164259 U CN U2008201164259U CN 200820116425 U CN200820116425 U CN 200820116425U CN 201210027 Y CN201210027 Y CN 201210027Y
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- transfer pipe
- heat
- air preheater
- fins
- fin
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- Expired - Lifetime
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- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The utility model discloses a heat transfer pipe of an air pre-heater, which is formed by pairwise buckling two integrally cast rectangular sheets. The inner side of each rectangular sheet is cast with a plurality of inside fins while the outer side thereof is casted with a plurality of outside fins. One end of the heat transfer pipe is a fixed end which is mounted in a fixed bracket, while the other end thereof is a sliding end which is sleeved in a sliding bracket. The inside fins and the outside fins are all straight short fins with the middle parts being opened with a plurality of broken slits. The long edges, which are pairwise buckled, of the two rectangular sheets are both opened with a sealing groove and a bolt connecting hole. The sealing groove is filled with sealing fillings. The two sheets are fixed firmly by the bolt and nut which pass through the bolt connecting hole. End sealing fillings are filled both between the fixed bracket and the fixed end of the heat transfer pipe and between the sliding bracket and the sliding end of the heat transfer pipe and are compressed by the sealing fillings compression bar. The heat transfer pipe of the air pre-heat has advantages of high heat transfer coefficient, long service life, compact structure, and high cast product efficiency.
Description
Technical field
The utility model belongs to the air preheater technical field, relates generally to a kind of heat-transfer pipe that is applied to air preheater.
Background technology
Air preheater generally adopts in the flue gas waste heat recovery system of petrochemical industry tubular heater, metallurgical industrial furnace, all kinds of boilers as energy-saving equipment.The ubiquitous problem of steel tubular air heater of using morely at present and heat pipe preheater is: when exhaust gas temperature is low (for example less than below 160 ℃), the heat-transfer pipe tube wall temperature that is positioned at smoke outlet is easy to be lower than the acid dew-point temperature of flue gas, cause serious low-temperature flue gas acid dew piont corrosion, life-span is generally shorter, and short may only have some months.When exhaust gas temperature is higher than 350 ℃, can produce heat-transfer pipe fin dust stratification, corroded by the corrosive dusty gas of being with of sulfuric acid vapor, can produce problems such as high temperature booster.
Patent Office of the People's Republic of China's disclosed a kind of " compound intensified heat-transfer type cast-iron air preheater " (ZL92213465.0), because its heat transfer element is the inside and outside cast iron pipe that all has fin, though inserted tie in the pipe, but because circular space restriction, radial inner fin is inevitable in the pipe forms the hollow of non-finned at tube hub, air hollow position in pipe flows, and heat-transfer effect is poor, has limited pipe inner fin strengthening effect.Simultaneously, inside and outside cast iron pipe, flat tube or the elliptical tube that all has a fin is complex-shaped, and wall thickness is thin again, therefore cast difficulty relatively, and yield rate is also lower.
The rib of slab formula heat exchanger that document " augmentation of heat transfer technology " (Lin Zonghu etc. write, Beijing: Chemical Industry Press, 2006.9) is mentioned has heat transfer efficiency height, compact conformation, characteristics such as light and handy firm, and application is extensive.Fin is the primary element of rib of slab formula heat exchanger, and its form is varied.The shortcoming of rib of slab formula heat exchanger is the manufacturing process complexity, and is strict, stops up easily, cleans difficulty, leaks in producing because of corrosion, then very difficult the repairing, and plate is thinner, and is not wear-resistant, is not suitable for adopting in tubular heater and all kinds of boiler.
Summary of the invention
The purpose of this utility model provides that a kind of heat transfer coefficient is big, long service life, compact conformation, the heat-transfer pipe that is applied to air preheater that casting yield is high.
The technical solution of the utility model is: the rectangle plate that two monoblock casts of fins became outside this heat-transfer pipe was cast with many inboard fins and the outside is cast with many by the inboard interlocks in twos and connects and composes.One end of this heat-transfer pipe is a stiff end, and this end is installed in the fixed support.The other end is a sliding end, and this end is sleeved in the sliding support.
Inboard fin and outside fin are straight brachypterism sheet.When the square plate of two block lengths interlocks in twos two inboard fins inwardly, two outside fins are outwardly.Inboard fin and the equidirectional setting of rectangular slab leaf length direction, outside fin and plate length direction vertical direction are provided with.Every middle linchpin mouth that is provided with a plurality of disconnections of fin, each linchpin mouth is staggered, and staggered linchpin mouth is arranged on the place, centre position of adjacent two brachypterism sheets.
Two long limits of two rectangle plates are crooked to the inside, and bending height is slightly larger than the height of inboard fin.All have seal groove and bolt connecting hole on the long limit that two rectangle plates interlock in twos.Be filled with airtight and watertight padding in the seal groove, bolt and nut is fastenedly connected two plates by bolt connecting hole.
All be filled with the end airtight and watertight padding between fixed support and the heat-transfer pipe stiff end and between sliding support and the heat-transfer pipe sliding end and compress by the airtight and watertight padding compression bar.
Both sides at heat-transfer pipe are provided with reinforcement.
Low-temperature flue gas contact-making surface at heat-transfer pipe is provided with enamel cover coat or applies other anticorrosive paints.
The rectangle plate is selected cast iron or cast steel material for use.
The utility model adopts the linchpin mouth in the middle of the fin staggered, can avoid forming a rule broken belt on plate, thereby reduce the intensity of plate, the linchpin mouthful staggered intensity that greatly increases plate.One end of heat-transfer pipe is sliding end and is connected with sliding support that this structure heat-transfer pipe when heat-transfer pipe is heated can slide in sliding support, so just can not damage preheater and heat-transfer pipe because of each device coefficient of expansion is different.On the both sides of heat-transfer pipe reinforcement is set and has improved heat-transfer pipe intensity too.Enamel cover coat is set or applies other anticorrosive paints at the low-temperature flue gas contact-making surface of heat-transfer pipe and can strengthen further that heat-transfer pipe is wear-resistant to undermine anti-flue gas acid dew point corrosive nature.The utility model can be widely used in the flue gas waste heat recovery system of petrochemical industry tubular heater and all kinds of boilers.
The utility model has the advantages that provide that a kind of heat transfer coefficient is big, long service life, compact conformation, the heat-transfer pipe that is applied to air preheater that casting yield is high.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is an A-A cutaway view among Fig. 1.
Fig. 3 is that outside fin is arranged schematic diagram on the utility model plate.
Fig. 4 is that inboard fin is arranged schematic diagram on the utility model plate.
Fig. 5 is the structural representation of the utility model heat-transfer pipe when installing in air preheater.
Among the figure, 1, fixed support, 2, bolt connecting hole, 3, stiff end, 4, the end airtight and watertight padding, 5, outside fin, 6, inboard fin, 7, the rectangle plate, 8, long limit, 9, linchpin mouthful, 10, the airtight and watertight padding compression bar, 11, sliding end, 12, sliding support, 13, bolt and nut, 14, reinforcement, 15, airtight and watertight padding, 16, seal groove, 17, heat-transfer pipe, 18, exhanst gas outlet, 19, air intake, 20, the preheater first tube side housing, 21, air outlet slit, 22, smoke inlet, 23, plenum chamber, 24, the preheater second tube side housing.
The specific embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present utility model is described further.
As Fig. 1, Fig. 2, Fig. 3, Fig. 4, shown in:
The rectangle plate 7 that two monoblock casts of fins 5 became outside this heat-transfer pipe 17 was cast with many inboard fins 6 and the outside is cast with many by the inboard interlocks in twos and connects and composes.One end of this heat-transfer pipe 17 is a stiff end 3, and this end is connected with fixed support 1.The other end is a sliding end 11, and this end is connected with sliding support 12.
Described inboard fin 6 and outside fin 5 are straight brachypterism sheet.When the square plate 7 of two block lengths interlocks in twos two inboard fins 6 inwardly, two outside fins 5 are outwardly.Inboard fin 6 arranges vertically that along rectangle plate 7 length directions outside fin 5 is along rectangle plate 7 length direction lateral arrangement.Be provided with the linchpin mouth 9 of a plurality of disconnections in the middle of every row's fin, each linchpin mouth 9 is staggered, and promptly staggered linchpin mouth 9 is arranged on the place, centre position of adjacent two brachypterism sheets 5,6.
Two long limits 8 of described two rectangle plates 7 are crooked to the inside, and bending height is slightly larger than the height of inboard fin.Have seal groove 16 and bolt connecting hole 2 on the two long limits 8.Be filled with airtight and watertight padding 15 in the seal groove 16.Two rectangle plates 7 are fastenedly connected by bolt connecting hole 2 by bolt and nut 13.
All be filled with end airtight and watertight padding 4 between fixed support 1 and the heat-transfer pipe stiff end 3 and between sliding support 12 and the heat-transfer pipe sliding end 11 and compressing by airtight and watertight padding compression bar 10.
Be provided with reinforcement 14 on the both sides of heat-transfer pipe 17.
Low-temperature flue gas contact-making surface at heat-transfer pipe 17 is provided with enamel cover coat or applies other anticorrosive paints.
Described rectangle plate 7 is selected cast iron or cast steel material for use.
As shown in Figure 5, this air preheater is installed in a plurality of heat-transfer pipe 17 permutation and combination and forms a new air preheater in the air preheating housing.During use, flue gas is successively entered in air preheater second tube side housing 24 and the air preheater first tube side housing 20 by smoke inlet 22.Flue gas flows through the outside of rectangle plate 7 in many row's heat-transfer pipes 17, with heat transferred outside fin 5 and rectangle plate 7.Last flue gas flows out the air preheater first tube side housing 20 from exhanst gas outlet 18.Air enters heat-transfer pipe 17 inboards in the air preheater first tube side housing 20 by air intake 19, after absorbing the heat of inboard fin 6 and rectangle plate 7, enter heat-transfer pipe 17 inboards in the air preheater second tube side housing 24 again by plenum chamber 23, after further absorbing heat, hot-air flows out from air outlet slit 21 at last.This air preheater is finished heat exchange by above-mentioned flow process.
Claims (7)
1, a kind of heat-transfer pipe that is applied to air preheater, it is characterized in that: the rectangle plate that two monoblock casts of fins became outside this heat-transfer pipe was cast with many inboard fins and the outside is cast with many by the inboard interlocks in twos and connects and composes, one end of this heat-transfer pipe is a stiff end, this end is installed in the fixed support, the other end is a sliding end, and this end is sleeved in the sliding support.
2, a kind of heat-transfer pipe that is applied to air preheater according to claim 1, it is characterized in that: inboard fin and outside fin are straight brachypterism sheet, two inboard fins inwardly when the square plate of two block lengths interlocked in twos, two outside fins outwardly, inboard fin and the equidirectional setting of rectangular slab leaf length direction, outside fin and plate length direction vertical direction are provided with, every middle linchpin mouth that is provided with a plurality of disconnections of fin, each linchpin mouth is staggered, and staggered linchpin mouth is arranged on the place, centre position of adjacent two brachypterism sheets.
3, a kind of heat-transfer pipe that is applied to air preheater according to claim 1, it is characterized in that: two long limits of two rectangle plates are crooked to the inside, bending height is slightly larger than the height of inboard fin, all have seal groove and bolt connecting hole on the long limit that two rectangle plates interlock in twos, be filled with airtight and watertight padding in the seal groove, bolt and nut is fastenedly connected two plates by bolt connecting hole.
4, a kind of heat-transfer pipe that is applied to air preheater according to claim 1 is characterized in that: all be filled with the end airtight and watertight padding between fixed support and the heat-transfer pipe stiff end and between sliding support and the heat-transfer pipe sliding end and compressed by the airtight and watertight padding compression bar.
5, a kind of heat-transfer pipe that is applied to air preheater according to claim 1, it is characterized in that: the both sides at heat-transfer pipe are provided with reinforcement.
6, a kind of heat-transfer pipe that is applied to air preheater according to claim 1 is characterized in that: the low-temperature flue gas contact-making surface at heat-transfer pipe is provided with enamel cover coat or applies other anticorrosive paints.
7, a kind of heat-transfer pipe that is applied to air preheater according to claim 1, it is characterized in that: the rectangle plate is selected cast iron or cast steel material for use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201164259U CN201210027Y (en) | 2008-05-09 | 2008-05-09 | Heat-transfer pipe applying to air preheater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201164259U CN201210027Y (en) | 2008-05-09 | 2008-05-09 | Heat-transfer pipe applying to air preheater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201210027Y true CN201210027Y (en) | 2009-03-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201164259U Expired - Lifetime CN201210027Y (en) | 2008-05-09 | 2008-05-09 | Heat-transfer pipe applying to air preheater |
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| Country | Link |
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| CN (1) | CN201210027Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102121707A (en) * | 2011-04-22 | 2011-07-13 | 茂名重力石化机械制造有限公司 | Air preheater for cast iron on high-head fins |
| CN103868393A (en) * | 2014-03-03 | 2014-06-18 | 北京中能诺泰节能环保技术有限责任公司 | Efficient heat exchange pipe |
| CN104406445A (en) * | 2014-11-24 | 2015-03-11 | 无锡鸿声铝业有限公司 | Aluminum finned tube heat exchanger |
| CN104654841A (en) * | 2013-11-22 | 2015-05-27 | 江苏东方成套设备制造有限公司 | Fin heat exchanger of air preheating device |
| CN104654344A (en) * | 2013-11-22 | 2015-05-27 | 江苏东方成套设备制造有限公司 | Air preheat device of petrochemical heating furnace |
| CN104864410A (en) * | 2014-02-21 | 2015-08-26 | 中石化洛阳工程有限公司 | Cast-iron heat tube air preheater |
| CN108332597A (en) * | 2018-03-14 | 2018-07-27 | 西安交通大学 | A kind of air setting flue gas heat and mass transfer enhancement element and its heat exchanger |
-
2008
- 2008-05-09 CN CNU2008201164259U patent/CN201210027Y/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102121707A (en) * | 2011-04-22 | 2011-07-13 | 茂名重力石化机械制造有限公司 | Air preheater for cast iron on high-head fins |
| CN102121707B (en) * | 2011-04-22 | 2013-04-17 | 茂名重力石化机械制造有限公司 | Air preheater for cast iron on high-head fins |
| CN104654841A (en) * | 2013-11-22 | 2015-05-27 | 江苏东方成套设备制造有限公司 | Fin heat exchanger of air preheating device |
| CN104654344A (en) * | 2013-11-22 | 2015-05-27 | 江苏东方成套设备制造有限公司 | Air preheat device of petrochemical heating furnace |
| CN104864410A (en) * | 2014-02-21 | 2015-08-26 | 中石化洛阳工程有限公司 | Cast-iron heat tube air preheater |
| CN103868393A (en) * | 2014-03-03 | 2014-06-18 | 北京中能诺泰节能环保技术有限责任公司 | Efficient heat exchange pipe |
| CN104406445A (en) * | 2014-11-24 | 2015-03-11 | 无锡鸿声铝业有限公司 | Aluminum finned tube heat exchanger |
| CN108332597A (en) * | 2018-03-14 | 2018-07-27 | 西安交通大学 | A kind of air setting flue gas heat and mass transfer enhancement element and its heat exchanger |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: LUOYANG PETROCHEMICAL ENGINEERING CO., CHINA PETRO Free format text: FORMER OWNER: LIYANG CITY HENGXIANG SPECIAL STEEL MECHANICAL MANUFACTURING CO., LTD. Effective date: 20090410 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20090410 Address after: 27 Zhongzhou West Road, Qilihe, Luoyang, Henan, zip code: 471003 Co-patentee after: Liyang Hengxiang Special Steel Machinery Manufacturing Co., Ltd. Patentee after: Sinopec group Luoyang Petrochemical Engineering Company Address before: Tianmu Lake Industrial Park, Jiangsu, Liyang Province, China: 213332 Patentee before: Liyang Hengxiang Special Steel Machinery Manufacturing Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20090318 |
|
| CX01 | Expiry of patent term |