CN103307910B - Anti-corrosion and dirt-resistant efficient flue gas waste heat recovery device - Google Patents
Anti-corrosion and dirt-resistant efficient flue gas waste heat recovery device Download PDFInfo
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- CN103307910B CN103307910B CN201310253579.8A CN201310253579A CN103307910B CN 103307910 B CN103307910 B CN 103307910B CN 201310253579 A CN201310253579 A CN 201310253579A CN 103307910 B CN103307910 B CN 103307910B
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Abstract
The invention discloses an anti-corrosion and dirt-resistant efficient flue gas waste heat recovery device, and belongs to the technical field of energy utilization. A heat exchange device is characterized in that the two sides of finned tubes penetrate through locating holes of side surface housings; the finned tubes and the side surface housings are flexibly sealed by high-temperature-resistant rubber rings; upper and lower housings are connected with the side surface housings; and a heat exchanger housing is formed. Particularly, the efficient heat exchange device for recovering flue gas waste heat of various boilers by utilizing a high-heat-conduction filling composite can prevent low-temperature acid dew corrosion of flue gas, can reduce or remove dust stratification and scaling on the surface of a heat exchanger, has comprehensive properties of acid dew corrosion resistance, difficulty in scaling, good heat-conducting property, easiness in processing and forming and the like, and solves the problem of the low-temperature acid dew corrosion of flue gas waste heat recovery; with the adoption of the easy-to-dismount combined housing, maintenance of the heat exchanger and replacement of finned tube units are facilitated; and the heat exchanger is in a modular structure integrally, so that the size can be adjusted in three directions to meet requirements of the sizes and the heat exchange amount of different air channels.
Description
Technical field
The present invention belongs to technical field of energy utilization, particularly a kind of efficient flue gas waste heat retracting device of anticorrosion anti-tartar.Specifically, utilize special type composite material to carry out reclaiming the high-efficiency heat exchanger of various residual heat from boiler fume, the low temperature acid dew corrosion of flue gas can be prevented, and can reduce or remove the ash deposit and slag buildup of heat exchanger surface.
Background technology
Containing a certain amount of sulfur dioxide and sulfur trioxide in boiler smoke, their water vapours with flue gas in are combined generation sulfuric acid vapor, and its condensation temperature is called the acid dew point of flue gas.When heated surface at the end of boiler temperature is lower than flue gas acid dew point, surface will form sulfuric acid solution.
When metallic recuperator is used for flue gas waste heat recovery, for preventing the corrosion of acid dew, exhaust gas temperature design, at 120 ~ 140 DEG C, considers that the heat transfer coefficient that in operation, heating surface retrofit causes reduces, actual exhaust gas temperature is many at 140 ~ 180 DEG C, and heat loss due to exhaust gas causes mass energy to be wasted.On the other hand, high fume temperature can cause the water consumption of flue gas desulfurization to increase, this is because wet desulphurization requires that the temperature that flue gas enters desulfurizing tower is 80 DEG C, adopts water spray to need to consume a large amount of cooling waters to high-temperature flue gas desuperheat.
As adopted corrosion resistant heat transmission equipment Mist heat recovering, then can overcome the restriction of corrosion, flue gas exhaust gas temperature is at least reduced to 80 DEG C from 120 DEG C.According to existing result of study, large-sized boiler exhaust gas temperature often reduces by 16 ~ 20 DEG C, and boiler thermal output improves 1%.Therefore, use corrosion-resistant recuperation of heat to equip reduction by 40 DEG C of exhaust gas temperatures, boiler efficiency can improve 2 ~ 3%, significantly improves total energy approach efficiency.Meanwhile, the cooling water inflow needed for spray cooling can be saved, reach the double effects of energy-saving and water-saving.
Existing flue gas anti-corrosion method mainly contains two kinds: the heat exchanger of metallic recuperator surface coating corrosion-resistant finishes and utilization resistant material.For the method for metal surface coating corrosion-resistant finishes, coating is difficult to cover heat exchanger surface completely, and coating is subject to thermal stress effect and comes off.For the heat exchanger of resistant material, applying more is teflon heat exchanger, but because fluoroplastics are difficult to machine-shaping and thermal conductivity factor is low, teflon heat exchanger heat transfer property is more weak, be confined to the form of thin wall tubule, there is problems such as sealing difficulty, tube bank is not easily fixed, easily block, flow resistance is large in actual applications.
Desirable flue gas heat-recovering device, except possessing good corrosion resistance, also should have excellent heat transfer property, comprises the heat transfer of strengthening fume side, the thermal resistance that the dust stratification in minimizing running and fouling cause.
Summary of the invention
The object of this invention is to provide a kind of high-efficiency heat exchanger of anticorrosion ant-scaling, it is characterized in that, the composite heat-exchanger rig of described anticorrosion ant-scaling adopts the form of finned tube exchanger, and pipe internal flow is water, and managing fluid between outer fin is flue gas; The structure of this heat-exchanger rig is by the locating hole of finned tube 1 both sides through side housing 3, by high-temperature resistant rubber circle 4 flexible sealing between finned tube 1 and side housing 3, then upper-lower casing 2 is connected with side housing 3, form outer cover of heat exchanger, regularly arranged with horizontally-arranged, perpendicular row at outer cover of heat exchanger internally finned tube 1; And in outer cover of heat exchanger both sides, two resistance to bending pipes 5 of finned tube termination circular resilient in every horizontally-arranged finned tube are tightly connected, and a shape passage in a row, finally, the passway vertically arranged outer cover of heat exchanger both sides is respectively communicated with a communicating pipe 6.
The size of described outer cover of heat exchanger in space three-dimensional direction changes to adapt to boiler flue size, determine that XY plane internally finned tube 1 is in the length of X-direction and finned tube 1 row in the Y direction according to flue size, number of fins is with the proportional increase of pipe range, and heat exchanger is determined in the size of Z-direction and actual required heat exchange area according to flue at the columns of Z-direction.
The row that described outer cover of heat exchanger internally finned tube 1 arranges is equal with columns or not etc.
Described multiple outer cover of heat exchanger is connected by the flange hole of its side, or fixes with boiler flue.
The material of described finned tube is high conductive filler type composite, the base material of composite is nylon, polyolefin, polyphenylene sulfide ethers plastic material or elastomeric material or ceramic material, Graphene, CNT, carbon fiber, metal particle and fine particle composition is filled, to improve the thermal conductivity of composite in the inside of these base materials.
The serviceability temperature scope of described finned tube is room temperature to 200 DEG C, not only contains all temperature ranges of flue gas waste heat recovery, also when flue-gas temperature fluctuates, effectively prevents thermal shock to the infringement of finned tube.
Described high-temperature resistant rubber circle is I-shaped structure, is stuck in side housing 3 finned tube fixing hole.
Between described finned tube and housing, flexible sealing, finned tube adopt each other and flexibly connect, and finned tube can move 1 ~ 10mm along pipe range direction, provides mechanical disturbance, removes operating ash deposit and slag buildup.
Described finned tube should according to the fuel type of boiler and composition, and regulate spacing of fin and finned tube arrangement mode, wherein spacing of fin is between 1 ~ 15mm, and finned tube is that in-line arrangement or fork arrangement are put, and spacing is 0.5 ~ 3 times of finned tube caliber.
Beneficial effect of the present invention: (1) uses corrosion resistant composite to make heat-exchanger rig, solves the low temperature acid dew etching problem of flue gas waste heat recovery; (2) composite that this device is used has high-termal conductivity, can effective transferring heat, and materials'use temperature comprises room temperature to 200 DEG C simultaneously, and meet the temperature requirement that flue gas heat reclaims, can remove smoke the infringement of temperature fluctuation to finned tube; (3) adopt the heat exchange of fin structure strengthening fume side, improve heat recovery efficiency; (4) based on fuel kind optimized fin spacing and finned tube arrangement mode, reduces ash deposit and slag buildup in running; (5) between finned tube and housing, flexible sealing, finned tube adopt each other and flexibly connect, and finned tube can move along pipe range direction, provides mechanical disturbance, removes operating ash deposit and slag buildup; (6) heat exchanger shell is made up of dismountable module, can according to cleaning needs, dismounting partial shell, cleaning and replacing finned tube unit; (7) heat exchanger entirety adopts modular structure, can regulate size in three directions, with the requirement of satisfied different duct dimension and heat exchange amount.
Accompanying drawing explanation
Fig. 1 is the 3-D view of the corrosion-resistant efficient flue gas waste heat retracting device with housing.The form that heat-exchanger rig adopts finned tube 1 in-line arrangement to arrange, perpendicular to the exemplary arrangement YZ plane of finned tube 1 being 3 × 3 rows.
Fig. 2 is the parts schematic diagram of heat-exchanger rig, and in figure, 1 is finned tube, and the shape of fin is rectangle; 2 is upper-lower casing, and 3 is side housing.
Fig. 3 is the structure chart of heat exchanger shell.
Fig. 4 is the profile by high-temperature resistant rubber circle 4 flexible sealing between finned tube 1 and side housing 3.
Detailed description of the invention
The invention provides a kind of high-efficiency heat exchanger of anticorrosion ant-scaling, be explained below in conjunction with accompanying drawing.
Fig. 1 is the 3-D view of the corrosion-resistant efficient flue gas waste heat retracting device with housing.The structure of this heat-exchanger rig is by the locating hole of finned tube 1 both sides through side housing 3, by high-temperature resistant rubber circle 4 flexible sealing between finned tube 1 and side housing 3, high-temperature resistant rubber circle is as shown in Figure 4 I-shaped structure, is stuck in side housing 3 finned tube fixing hole.Then upper-lower casing 2 is connected with side housing 3, forms outer cover of heat exchanger, regularly arranged with horizontally-arranged, perpendicular row at outer cover of heat exchanger internally finned tube 1; And in outer cover of heat exchanger both sides, two resistance to bending pipes 5 of finned tube termination circular resilient in every horizontally-arranged finned tube are tightly connected, and a shape passage in a row, finally, the passway vertically arranged outer cover of heat exchanger both sides is respectively communicated with a communicating pipe 6.
Fig. 2 is the parts schematic diagram of heat-exchanger rig, and in figure, 1 is finned tube, and the shape of fin is rectangle; 2 is upper-lower casing, and upper-lower casing 2 is dull and stereotyped peripheral flanging structure, and wherein, two side flangings are air channel flanges, be provided with flange hole 7, left and right sides flange is the orifice plate be connected with side housing 3; 3 is side housings, is dull and stereotyped both sides turnup structure, and wherein, two side flangings are air channel flanges, and be provided with flange hole 7, upper and lower two ends are the orifice plates be connected with upper-lower casing 2; Side housing 3 distributes the locating hole of finned tube 1.
Fig. 3 is the structure chart of heat exchanger shell.Heat exchanger shell is made up of upper-lower casing 2 and side housing 3.The size of described outer cover of heat exchanger in space three-dimensional direction changes to adapt to boiler flue size, determine that XY plane internally finned tube 1 is in the length of X-direction and finned tube 1 row in the Y direction according to flue size, number of fins is with the proportional increase of pipe range, and heat exchanger is determined in the size of Z-direction and actual required heat exchange area according to flue at the columns of Z-direction.The row that outer cover of heat exchanger internally finned tube 1 arranges is equal with columns or not etc., as the form that heat-exchanger rig in Fig. 1 adopts finned tube 1 in-line arrangement to arrange, perpendicular to the YZ plane of finned tube 1 being 3 × 3 exemplary arrangement of arranging.
The material of described finned tube is high conductive filler type composite, the base material of composite is nylon, polyolefin, polyphenylene sulfide ethers plastic material or elastomeric material or ceramic material, Graphene, CNT, carbon fiber, metal particle and fine particle composition is filled, to improve the thermal conductivity of composite in the inside of these base materials.
This device operation principle is: the composite heat-exchanger rig of this anticorrosion ant-scaling adopts the form of finned tube exchanger, and pipe internal flow is water, and managing fluid between outer fin is flue gas; Flue gas flows between the outer fin of pipe, and water is in pipe internal flow, and both are overall counter-flow arrangement.The composite of high heat conduction can effective transferring heat, and fin structure enhances the heat exchange of fume side.Flue gas heat passes to the water in pipe, and flue-gas temperature reduces from the inlet to the outlet gradually, and water temperature raises from the inlet to the outlet gradually.The serviceability temperature scope of described finned tube is room temperature to 200 DEG C, not only contains all temperature ranges of flue gas waste heat recovery, also when flue-gas temperature fluctuates, effectively prevents thermal shock to the infringement of finned tube.Between finned tube and housing, flexible sealing, finned tube adopt each other and flexibly connect, and finned tube can move 1 ~ 10mm along pipe range direction, provides mechanical disturbance, removes operating ash deposit and slag buildup.Described finned tube should according to the fuel type of boiler and composition, and regulate spacing of fin and finned tube arrangement mode, wherein spacing of fin is between 1 ~ 15mm, and finned tube is that in-line arrangement or fork arrangement are put, and spacing is 0.5 ~ 3 times of finned tube caliber.
When there is the problem of dust stratification and incrustation in running, flexibly connect because flexible sealing, finned tube between finned tube and housing adopt each other, finned tube can move 1 ~ 10mm along pipe range direction, provides mechanical disturbance, removes operating ash deposit and slag buildup.In addition, heat exchanger shell is made up of dismountable module, can according to cleaning needs, dismounting partial shell, cleaning and replacing finned tube unit.
Claims (1)
1. a high-efficiency heat exchanger for anticorrosion ant-scaling, the composite heat-exchanger rig of described anticorrosion ant-scaling adopts the form of finned tube exchanger, and pipe internal flow is water, and managing fluid between outer fin is flue gas; The structure of this heat-exchanger rig is by the locating hole of finned tube (1) both sides through side housing (3), by high-temperature resistant rubber circle (4) flexible sealing between finned tube (1) and side housing (3), then upper-lower casing (2) is connected with side housing (3), form outer cover of heat exchanger, regularly arranged with horizontally-arranged, perpendicular row at outer cover of heat exchanger internally finned tube (1); And in outer cover of heat exchanger both sides, the two resistance to bending pipe of finned tube termination circular resilient (5) in every horizontally-arranged finned tube are tightly connected, a shape passage in a row, finally, the passway vertically arranged outer cover of heat exchanger both sides respectively uses a communicating pipe (6) to be communicated with; It is characterized in that, the material of described finned tube is high conductive filler type composite, the base material of composite is nylon, polyolefin, polyphenylene sulfide ethers plastic material or elastomeric material or ceramic material, Graphene, CNT, carbon fiber, metal particle and fine particle composition is filled, to improve the thermal conductivity of composite in the inside of these base materials; Described high-temperature resistant rubber circle is I-shaped structure, is stuck in side housing (3) finned tube fixing hole; Between described finned tube and housing, flexible sealing, finned tube adopt each other and flexibly connect, and finned tube can move 1 ~ 10mm along pipe range direction, provides mechanical disturbance, removes operating ash deposit and slag buildup; Finned tube should according to the fuel type of boiler and composition, and regulate spacing of fin and finned tube arrangement mode, wherein spacing of fin is between 1 ~ 15mm, and finned tube is that in-line arrangement or fork arrangement are put, and spacing is 0.5 ~ 3 times of finned tube caliber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310253579.8A CN103307910B (en) | 2013-06-24 | 2013-06-24 | Anti-corrosion and dirt-resistant efficient flue gas waste heat recovery device |
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| CN201310253579.8A CN103307910B (en) | 2013-06-24 | 2013-06-24 | Anti-corrosion and dirt-resistant efficient flue gas waste heat recovery device |
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| CN103307910A CN103307910A (en) | 2013-09-18 |
| CN103307910B true CN103307910B (en) | 2015-04-15 |
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| CN104315888A (en) * | 2014-10-16 | 2015-01-28 | 广西玉林宏江能源科技有限公司 | Two special discharging pipe and heat pipe heat exchangers for being matched with various drying machines to recycle residual heat |
| CN105180681B (en) * | 2015-11-05 | 2017-02-01 | 洛阳隆华传热节能股份有限公司 | Detachable pipe bundle flue type heat collection equipment and method |
| CN105758233A (en) * | 2015-12-11 | 2016-07-13 | 江苏海事职业技术学院 | Tube fin type gas-liquid heat exchanger with shell cooling function |
| CN105509514A (en) * | 2015-12-11 | 2016-04-20 | 江苏海事职业技术学院 | Fin tube type gas-liquid heat exchanger |
| CN108727819B (en) * | 2017-04-13 | 2021-01-26 | 青岛创合新材料有限公司 | Carbon fiber reinforced polyphenylene sulfide nano composite material, preparation method and application of novel radiating pipe |
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| CN108413428A (en) * | 2018-03-30 | 2018-08-17 | 青岛达能环保设备股份有限公司 | Gas-liquid-solid coalescence absorbs the flue gas deep cooler for inhibiting low-temperature corrosion |
| CN109631653A (en) * | 2018-12-25 | 2019-04-16 | 北京鑫晟环能科技发展有限公司 | Fin formula cryogenic gas heat exchange condenses water collector |
| CN111637756B (en) * | 2020-06-04 | 2022-06-03 | 山东理工大学 | High-temperature solid bulk material waste heat recovery heat exchanger |
| CN113237077B (en) * | 2021-04-09 | 2022-04-19 | 代少东 | Condensation heat exchanger structure |
| CN114659392B (en) * | 2022-03-29 | 2024-01-30 | 南京工业大学 | Detachable finned tube heat exchanger |
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| CN2061267U (en) * | 1988-07-12 | 1990-08-29 | 机械电子工业部第五设计研究院 | Cross metal slot type heat-exchanging unit |
| CN1276515A (en) * | 2000-06-09 | 2000-12-13 | 南京化工大学 | Technology for making teflon plate-fin heat exchanger |
| CN202885607U (en) * | 2012-09-18 | 2013-04-17 | 上海迅功热能技术有限公司 | H-shaped finned tube energy saver used for industrial and civil boilers |
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2013
- 2013-06-24 CN CN201310253579.8A patent/CN103307910B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2061267U (en) * | 1988-07-12 | 1990-08-29 | 机械电子工业部第五设计研究院 | Cross metal slot type heat-exchanging unit |
| CN1276515A (en) * | 2000-06-09 | 2000-12-13 | 南京化工大学 | Technology for making teflon plate-fin heat exchanger |
| CN202885607U (en) * | 2012-09-18 | 2013-04-17 | 上海迅功热能技术有限公司 | H-shaped finned tube energy saver used for industrial and civil boilers |
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Inventor after: Chen Lin Inventor after: Xu Chao Inventor after: Du Xiaoze Inventor after: Yang Yongping Inventor after: Yang Lijun Inventor after: Xu Gang Inventor after: Wei Gaosheng Inventor after: Liang Jiangtao Inventor before: Chen Lin Inventor before: Du Xiaoze Inventor before: Yang Yongping Inventor before: Yang Lijun Inventor before: Xu Chao Inventor before: Xu Gang Inventor before: Wei Gaosheng Inventor before: Liang Jiangtao |
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Free format text: CORRECT: INVENTOR; FROM: CHEN LIN DU XIAOZE YANG YONGPING YANG LIJUN XU CHAO XU GANG WEI GAOSHENG LIANG JIANGTAO TO: CHEN LIN XU CHAO DU XIAOZE YANG YONGPING YANG LIJUN XU GANG WEI GAOSHENG LIANG JIANGTAO |
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