CN203464803U - Anti-corrosion anti-scale high-efficiency flue gas waste heat recovery device - Google Patents

Anti-corrosion anti-scale high-efficiency flue gas waste heat recovery device Download PDF

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Publication number
CN203464803U
CN203464803U CN201320365728.5U CN201320365728U CN203464803U CN 203464803 U CN203464803 U CN 203464803U CN 201320365728 U CN201320365728 U CN 201320365728U CN 203464803 U CN203464803 U CN 203464803U
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CN
China
Prior art keywords
finned tube
flue gas
heat exchanger
heat
gas waste
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CN201320365728.5U
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Chinese (zh)
Inventor
陈林
徐超
杜小泽
杨勇平
杨立军
徐钢
魏高升
梁江涛
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华北电力大学
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Priority to CN201320365728.5U priority Critical patent/CN203464803U/en
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Publication of CN203464803U publication Critical patent/CN203464803U/en

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Abstract

The utility model discloses an anti-corrosion anti-scale high-efficiency 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 lateral housings; the finned tubes and the lateral housings are flexibly sealed by high-temperature-resistant rubber rings; upper and lower housings are connected with the lateral housings; and a heat exchanger housing is formed. Particularly, the high-efficiency heat exchange device for recovering flue gas waste heat of various boilers by utilizing a high-heat-conduction filling composite material can prevent low-temperature acid dew corrosion of flue gas and can reduce or remove dust stratification and scale formation on the surface of a heat exchanger; the high-efficiency heat exchange device has comprehensive properties that acid dew corrosion resistance is high, scale formation is not easy, heat-conducting property is good, machining and forming are easy, and the problem of the low-temperature acid dew corrosion of flue gas waste heat recovery is solved; with the adoption of the easily-disassembled 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

A kind of efficient flue gas waste heat retracting device of anticorrosion anti-tartar
Technical field
The utility model is to belong to energy utilization device field, particularly a kind of efficient flue gas waste heat retracting device of anticorrosion anti-tartar.Specifically, utilize special type composite material to reclaim the high-efficiency heat exchanger of various residual heat from boiler fume, can prevent that the low temperature acid of flue gas from revealing corrosion, and can reduce or remove the ash deposit and slag buildup of heat exchanger surface.
Background technology
In boiler smoke, contain a certain amount of sulfur dioxide and sulfur trioxide, their water vapours in flue gas are combined and are generated 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 during 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 that acid from revealing, corrode, exhaust gas temperature designs at 120~140 ℃, considers that heating surface in service pollutes the heat transfer coefficient causing and reduces, actual exhaust gas temperature is many at 140~180 ℃, and heat loss due to exhaust gas causes mass energy waste.On the other hand, high fume temperature can cause that the water consumption of flue gas desulfurization increases, and this is because it is 80 ℃ that wet desulphurization requirement flue gas enters the temperature of desulfurizing tower, adopts water spray need to consume a large amount of cooling waters to high-temperature flue gas desuperheat.
As adopt corrosion resistant heat transmission equipment Mist heat recovering, and can overcome the restriction of corrosion, flue gas exhaust gas temperature is at least reduced to 80 ℃ from 120 ℃.According to existing result of study, 16~20 ℃ of the every reductions of large-sized boiler exhaust gas temperature, boiler thermal output improves 1%.Therefore, use corrosion-resistant recuperation of heat equipment to reduce by 40 ℃ of exhaust gas temperatures, boiler efficiency can improve 2~3%, significantly improves total energy approach efficiency.Meanwhile, can save the required cooling water inflow of spray cooling, reach the double effects of energy-saving and water-saving.
Existing flue gas anti-corrosion method mainly contains two kinds: the heat exchanger that metallic recuperator surface applies corrosion-resistant finishes and uses resistant material.The method that applies corrosion-resistant finishes for metal surface, coating is difficult to cover completely heat exchanger surface, and coating is subject to thermal stress effect and comes off.Heat exchanger for 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 a little less than, be confined to the form of thin wall tubule, exist in actual applications sealing difficulty, tube bank be difficult for fixing, easily stop up, the problem such as flow resistance is large.
Desirable flue gas heat-recovering device, except possessing good corrosion resistance, also should have good heat transfer property, comprises the heat transfer of strengthening fume side, the thermal resistance that the dust stratification in minimizing running and fouling cause.
Utility model content
The purpose of this utility model is to provide a kind of efficient flue gas waste heat retracting device of anticorrosion anti-tartar, it is characterized in that, the structure of this heat-exchanger rig is the locating hole through side housing 3 by finned tube 1 both sides, between finned tube 1 and side housing 3 by high-temperature resistant rubber circle 4 flexible sealings, 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 finned tube terminations in every horizontally-arranged finned tube are tightly connected with the withstand voltage bend pipe 5 of semicircle elasticity, a shape passage in a row, last, each was communicated with the passway that outer cover of heat exchanger both sides are vertically arranged with a communicating pipe 6.
Described outer cover of heat exchanger changes to adapt to boiler flue size in the size of space three-dimensional direction, according to flue size determine XY plane internally finned tube 1 at the length of directions X and finned tube 1 row in Y-direction, number of fins is with the proportional increase of pipe range, and heat exchanger is determined at size and the actual required heat exchange area of Z direction according to flue at the columns of Z direction.
The row that described outer cover of heat exchanger internally finned tube 1 is arranged does not equate with columns or not etc.
Described a plurality of 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 heat conduction filled-in 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 are filled in inside at these base materials, to improve the thermal conductivity of composite.
Described high-temperature resistant rubber circle is I-shaped structure, is stuck in side housing 3 finned tube fixing holes.
Between described finned tube and housing, flexible sealing, finned tube adopt and flexibly connect each other, and finned tube can move 1~10mm along pipe range direction, and mechanical disturbance is provided, and removes operating ash deposit and slag buildup.
The spacing of fin of described finned tube and finned tube are arranged as spacing of fin between 1~15mm, and finned tube is in-line arrangement or fork arranges and put, and spacing is 0.5~3 times of finned tube caliber.
The beneficial effects of the utility model: the composite heat-exchanger rig of (1) 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, etching problem is revealed in the low temperature acid that has solved flue gas waste heat recovery; (2) this installs composite used and has high-termal conductivity, effective transferring heat, and materials'use temperature comprises room temperature to 200 ℃ simultaneously, meets the temperature requirement that flue gas heat reclaims, and the infringement of temperature fluctuation to finned tube can remove smoke; (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, reduce ash deposit and slag buildup in service; (5) between finned tube and housing, flexible sealing, finned tube adopt and flexibly connect each other, and finned tube can move along pipe range direction, and mechanical disturbance is provided, and removes operating ash deposit and slag buildup; (6) heat exchanger shell is comprised of dismountable module, can be according to cleaning needs, and dismounting partial shell, cleans and changes finned tube unit; (7) the modular structure of the whole employing of heat exchanger, can be three direction adjusted sizes, to meet the requirement of different duct dimension and heat exchange amount.
Accompanying drawing explanation
Fig. 1 is the 3-D view with the corrosion-resistant efficient flue gas waste heat retracting device of housing.The form that heat-exchanger rig adopts finned tube 1 in-line arrangement to arrange is 3 * 3 rows' exemplary arrangement in the YZ plane perpendicular to finned tube 1.
Fig. 2 is the parts schematic diagram of heat-exchanger rig, and in figure, a is upper-lower casing shape schematic diagram; B is finned tube shape schematic diagram; C is side housing shape schematic diagram.
Fig. 3 is the structure chart of heat exchanger shell.
Fig. 4 is by the profile of high-temperature resistant rubber circle flexible sealing between finned tube and side housing.
The specific embodiment
The utility model provides a kind of efficient flue gas waste heat retracting device of anticorrosion anti-tartar, below in conjunction with accompanying drawing, is explained.
Fig. 1 is the 3-D view with the corrosion-resistant efficient flue gas waste heat retracting device of housing.The structure of this heat-exchanger rig is the locating hole through side housing 3 by finned tube 1 both sides, between finned tube 1 and side housing 3 by high-temperature resistant rubber circle 4 flexible sealings, high-temperature resistant rubber circle is as shown in the figure I-shaped structure, is stuck in side housing 3 finned tube fixing holes.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 finned tube terminations in every horizontally-arranged finned tube are tightly connected with the withstand voltage bend pipe 5 of semicircle elasticity, a shape passage in a row, last, each was communicated with the passway that outer cover of heat exchanger both sides are vertically arranged with a communicating pipe 6.
Fig. 2 is the parts schematic diagram of heat-exchanger rig, and in figure, a is upper-lower casing shape schematic diagram; B is finned tube shape schematic diagram; C is side housing shape schematic diagram.Wherein 1 is finned tube, fin be shaped as rectangle; 2 is upper-lower casing, and upper-lower casing 2 is dull and stereotyped peripheral flanging structure, wherein before and after two side flangings are air channel flanges, be provided with flange hole 7, left and right sides flange is the orifice plate being connected with side housing 3; The 3rd, side housing, is dull and stereotyped both sides turnup structure, and wherein front and back two side flangings are air channel flanges, are provided with flange hole 7, and upper and lower two ends are the orifice plates that are connected with upper-lower casing 2; The locating hole of finned tube 1 distributes on side housing 3.
Fig. 3 is the structure chart of heat exchanger shell.Heat exchanger shell is comprised of upper-lower casing 2 and side housing 3.Described outer cover of heat exchanger changes to adapt to boiler flue size in the size of space three-dimensional direction, according to flue size determine XY plane internally finned tube 1 at the length of directions X and finned tube 1 row in Y-direction, number of fins is with the proportional increase of pipe range, and heat exchanger is determined at size and the actual required heat exchange area of Z direction according to flue at the columns of Z direction.The row that outer cover of heat exchanger internally finned tube 1 is arranged do not equate with columns or not etc., as heat-exchanger rig in Fig. 1 adopts the form of finned tube 1 in-line arrangement layout, is 3 * 3 exemplary arrangement of arranging in the YZ plane perpendicular to finned tube 1.
The material of described finned tube is high heat conduction filled-in 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 are filled in inside at these base materials, to improve the thermal conductivity of composite.
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 fin outside pipe, and water is in pipe internal flow, and both are overall counter-flow arrangement.The composite of high heat conduction is transferring heat effectively, and fin structure has been strengthened 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 ℃, has not only comprised all temperature ranges of flue gas waste heat recovery, also, when flue-gas temperature fluctuates, effectively prevents the infringement of thermal shock to finned tube.Between finned tube and housing, flexible sealing, finned tube adopt and flexibly connect each other, and finned tube can move 1~10mm along pipe range direction, and mechanical disturbance is provided, and removes operating ash deposit and slag buildup.Described finned tube should be according to the fuel type of boiler and composition, regulates spacing of fin and finned tube arrangement mode, and wherein spacing of fin is between 1~15mm, and finned tube is in-line arrangement or fork arranges and put, and spacing is 0.5~3 times of finned tube caliber.
When the problem of generation dust stratification in service and incrustation, because flexible sealing, finned tube between finned tube and housing adopt and flexibly connect each other, finned tube can move 1~10mm along pipe range direction, and mechanical disturbance is provided, and removes operating ash deposit and slag buildup.In addition, heat exchanger shell is comprised of dismountable module, can be according to cleaning needs, and dismounting partial shell, cleans and changes finned tube unit.

Claims (6)

1. the efficient flue gas waste heat retracting device of an anticorrosion anti-tartar, it is characterized in that, the structure of this heat-exchanger rig is the locating hole through side housing (3) by finned tube (1) both sides, between finned tube (1) and side housing (3) by high-temperature resistant rubber circle (4) flexible sealing, 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 finned tube terminations in every horizontally-arranged finned tube are tightly connected with the withstand voltage bend pipe of semicircle elasticity (5), a shape passage in a row, last, the passway that outer cover of heat exchanger both sides are vertically arranged is respectively with being communicated with a communicating pipe (6).
2. the efficient flue gas waste heat retracting device of a kind of anticorrosion anti-tartar according to claim 1, is characterized in that, the row that described outer cover of heat exchanger internally finned tube (1) is arranged does not equate with columns or not etc.
3. the efficient flue gas waste heat retracting device of a kind of anticorrosion anti-tartar according to claim 1 is characterized in that, described a plurality of outer cover of heat exchanger are connected by the flange hole of its side, or fix with boiler flue.
4. the efficient flue gas waste heat retracting device of a kind of anticorrosion anti-tartar according to claim 1, is characterized in that, described high-temperature resistant rubber circle is I-shaped structure, is stuck in side housing (3) finned tube fixing hole.
5. the efficient flue gas waste heat retracting device of a kind of anticorrosion anti-tartar according to claim 1, it is characterized in that between described finned tube and housing, flexible sealing, finned tube adopt and flexibly connect each other, finned tube can move 1~10mm along pipe range direction, mechanical disturbance is provided, removes operating ash deposit and slag buildup.
6. the efficient flue gas waste heat retracting device of a kind of anticorrosion anti-tartar according to claim 1, the spacing of fin and the finned tube arrangement mode that it is characterized in that described finned tube are that spacing of fin is between 1~15mm, finned tube is in-line arrangement or fork arranges and puts, and spacing is 0.5~3 times of finned tube caliber.
CN201320365728.5U 2013-06-24 2013-06-24 Anti-corrosion anti-scale high-efficiency flue gas waste heat recovery device CN203464803U (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104833243A (en) * 2015-05-08 2015-08-12 杭州佰强能源科技有限公司 Plastic heat exchanger for recovering waste heat of low-temperature smoke
CN104848239A (en) * 2015-04-24 2015-08-19 洛阳明远石化技术有限公司 Smoke exhaust cooling equipment
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
CN105571350A (en) * 2016-02-23 2016-05-11 河北远征环保科技有限公司 Ash deposition resistance and acid dew corrosion resistance heat exchanger accurate in positioning and easy for side leakage
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

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104848239A (en) * 2015-04-24 2015-08-19 洛阳明远石化技术有限公司 Smoke exhaust cooling equipment
CN104833243A (en) * 2015-05-08 2015-08-12 杭州佰强能源科技有限公司 Plastic heat exchanger for recovering waste heat of low-temperature smoke
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
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
CN105571350A (en) * 2016-02-23 2016-05-11 河北远征环保科技有限公司 Ash deposition resistance and acid dew corrosion resistance heat exchanger accurate in positioning and easy for side leakage

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Granted publication date: 20140305

Termination date: 20190624