CN104697348B - Baking furnace fume waste-heat recovery device and method - Google Patents
Baking furnace fume waste-heat recovery device and method Download PDFInfo
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- CN104697348B CN104697348B CN201510141167.4A CN201510141167A CN104697348B CN 104697348 B CN104697348 B CN 104697348B CN 201510141167 A CN201510141167 A CN 201510141167A CN 104697348 B CN104697348 B CN 104697348B
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- heat exchange
- thermal medium
- drum
- pipe
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply
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- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
A kind of baking furnace fume waste-heat recovery device and method, including heat exchanger and drum, fin heat exchange pipe it is provided with in heat exchanger, filling thermal medium in fin heat exchange pipe, fin heat exchange pipe is connected with drum by thermal medium pipe, and drum has body and the central tube being located within the body, this internal filling water, central tube connects with thermal medium pipe, baking furnace fume in heat exchanger with heat exchange of thermal medium, then thermal medium in central tube with the water secondary heat exchange in drum.Heat recovery in heating agent gas can not resulted in energy waste by heat exchange, simultaneously because thermal medium temperature is higher, can vaporize when heat exchange, therefore flue gas will not produce condensation in heat exchanger on the surface of fin heat exchange pipe during heat exchange, it is ensured that heat transfer effect.
Description
Technical field
The invention belongs to novel energy field, particularly relate to a kind of aluminum oxide roasting furnace flue gas waste-heat recovery device and method.
Background technology
Industrial during aluminium oxide calcining, its discharge flue-gas temperature reaches 160～170 DEG C, has taken away substantial amounts of heat and has caused
The waste of the energy.In order to save the energy, industry typically understands recovery waste heat, and the method generally used is by flue gas in heat exchanger
Carry out heat exchange with the cold water in heat exchanger tube, make the heat in flue gas be converted to the heat in water, and then add hot water, for user.
But the mode of this flue gas and cold water heat exchange would generally cause because of excessive temperature differentials and there is dew condensation phenomenon at heat-transfer surface, makes hydrogen-oxygen
Change aluminium powder or slurry is attached on the heat-transfer surface of heat exchanger, affect heat transfer effect, cause heat exchange not smooth, be attached to heat exchanger tube surface
Aluminium-hydroxide powder or slurry are also difficult to clean off.
Therefore, it is necessary to design a kind of preferably baking furnace fume waste-heat recovery device and method, to solve the problems referred to above.
Summary of the invention
The problem existed for prior art, the present invention provide one utilize thermal medium and flue gas carry out after a heat exchange again with water
Carry out secondary heat exchange, thus prevent the baking furnace fume waste heat recovery of condensation from putting and method.
To achieve these goals, the present invention adopts the following technical scheme that
A kind of baking furnace fume waste-heat recovery device, including: heat exchanger and drum, it is provided with fin heat exchange pipe in described heat exchanger,
Filling thermal medium in described fin heat exchange pipe, described fin heat exchange pipe is connected with described drum by thermal medium pipe, described vapour
Bag has body and is positioned at described intrinsic central tube, described internal filling water, described central tube and described thermal medium pipe
Connection, baking furnace fume in described heat exchanger with the heat exchange of described thermal medium, then thermal medium is in described central tube
With the water secondary heat exchange in described drum.
Further, it is in vacuum state in described fin heat exchange pipe.
Further, described fin heat exchange pipe is provided with multiple, in laterally side by side and vertical multiple row row sets, and is fixed on described heat exchanger
In internal stent.
Further, described heat exchanger also includes that compressed air blowback device, described compressed air blowback device include multiple rows of multiple row injection height
The shower nozzle of speed air-flow, described shower nozzle is corresponding to the fin of described fin heat exchange pipe.
Further, described heat exchanger also includes impulse electromagnetic valve, compressed air reservoir and compressed air hose, and described compressed air is anti-
Blowing device and pass through impulse electromagnetic valve, compressed air hose connects with described compressed air reservoir.
Further, the lower section of described fin heat exchange pipe is provided with dust flue, and described dust flue side connects flexible turbine, described
Aluminium-hydroxide powder in described dust flue is discharged outside described heat exchanger by elastic turbine.
Further, described drum is additionally provided with thermal medium import and thermal medium outlet connects with described thermal medium pipe respectively,
Described central tube is passed in and out for described thermal medium；Thermometer, Pressure gauge and liquid level gauge, described thermometer it is additionally provided with on described drum
Temperature in measuring described drum, described Pressure gauge is the pressure of steam in measuring described drum, and described liquid level gauge enters
The water level of water is measured in described drum.
A kind of baking furnace fume exhaust heat recovering method, including:
A. a certain amount of water is injected in drum；
B. open Aluminium hydroxide roasting stove, baking furnace fume is passed through in heat exchanger, described baking flue gas in described heat exchanger with
The fin heat exchange pipe arranged in it carries out heat exchange, and the thermal medium in described fin heat exchange pipe is vaporized entrance institute after a heat exchange
Stating in the central tube of drum, and carry out secondary heat exchange with the water in described drum, after secondary heat exchange, liquefaction returns described fin heat exchange
In pipe, water is heated for reclaiming simultaneously.
Further, after repeatedly heat exchange, described fin heat exchange pipe adheres to substantial amounts of aluminium-hydroxide powder, now open and institute
State the impulse electromagnetic valve that fin heat exchange pipe connects, make the compressed air in compressed air reservoir through compressed air hose, pulse electromagnetic
Valve and the shower nozzle of compressed air blowback device, produce impulse wave and blow off described aluminium-hydroxide powder into dust flue.
Further, when accumulating in dust flue, a certain amount of described aluminium hydrate powder is last, starts elastic turbine by aluminium hydrate powder
End is discharged from described dust flue and is reclaimed outside described heat exchanger.
Beneficial effects of the present invention:
(1) described baking furnace fume the most once changes with the described thermal medium in described fin heat exchange pipe in described heat exchanger
Heat, owing to described thermal medium temperature is higher, can vaporize when heat exchange, and therefore flue gas will not be during heat exchange in described heat exchanger
The surface of described fin heat exchange pipe produces condensation, it is to avoid with water with described baking furnace fume at described fin heat exchange pipe surface heat exchanging
Time the dew that is condensed out drip and be combined the surface being bonded to described fin heat exchange pipe with aluminium hydroxide, affect heat transfer effect, while also avoid
The dew of sulfur-bearing drips the described fin heat exchange pipe of corrosion and described heat exchanger.Described thermal medium enters described central tube after being vaporized
Interior and in described drum water carries out secondary heat exchange, and the heat in heating agent gas can be converted to the heat in water, and then heating
Water is for user, it is achieved heat recovery, does not results in energy waste.
(2) it is provided with compressed air blowback device in described heat exchanger, can be by the aluminium-hydroxide powder of attachment on described fin heat exchange pipe
Blow off, enter in described dust flue, the most recyclable aluminium-hydroxide powder, decrease the wasting of resources.
Accompanying drawing explanation
Fig. 1 is baking furnace fume waste-heat recovery device structural representation of the present invention；
Fig. 2 is that baking furnace fume waste-heat recovery device A of the present invention is to structural representation.
In figure, 1-heat exchanger, 2-shell, 3-gas approach, 4-exhanst gas outlet, 5-dust flue, 6-elasticity impeller
Machine, 7-fin heat exchange pipe, 8-compressed air blowback device, 9-impulse electromagnetic valve, 10-compressed air reservoir,
11-compressed air hose, 12-drum, 121-body, 122-central tube, 13-water inlet, 14-temperature
Meter, 15-Pressure gauge, 16-liquid level gauge, 17-delivery port, 18-thermal medium import, 19-thermal medium
Outlet, 20-the first thermal medium pipe, 21-the second thermal medium pipe.
Detailed description of the invention
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings.
As depicted in figs. 1 and 2, baking furnace fume waste-heat recovery device of the present invention includes heat exchanger 1 and drum 12.Wherein heat exchange
Device 1 includes shell 2, shell 2 be respectively arranged at two ends with gas approach 3 and exhanst gas outlet 4, the centre of shell 2 is provided with fin and changes
Heat pipe 7, in the present embodiment, fin heat exchange pipe 7 is provided with multiple, in being arranged in shell 2 the most from top to bottom and fix
In internal stent (non-label), discharge several row simultaneously, vacuumize in fin heat exchange pipe 7, and be filled with thermal medium,
Under vacuum state, thermal medium is more beneficial for vaporization.Described fin heat exchange pipe 7 be provided around compressed air blowback device 8, compression
Air blowback device 8 is made up of the shower nozzle of multiple rows of multiple row injection high velocity air, each shower nozzle just fin to fin heat exchange pipe 7, spray
Head ejection air pulse at a high speed can effectively blow the aluminium-hydroxide powder of attachment, compressed air blowback on fin heat exchange pipe 7 off
Device 8 is connected with compressed air reservoir 10 by impulse electromagnetic valve 9, compressed air hose 11, and compressed air reservoir 10 is a circle
Tubular GB150-1998.When opening impulse electromagnetic valve 9, the compressed air in compressed air reservoir 10 can move quickly through compression sky
Tracheae 11, impulse electromagnetic valve 9, the shower nozzle of compressed air blowback device 8, the impulse wave of generation acts on will on fin heat exchange pipe 7
Aluminium-hydroxide powder blows off, prevents too much being attached on fin heat exchange pipe 7 of aluminium-hydroxide powder, affects heat transfer effect.Shell
The lower end of 2 is provided with dust-exhausting port 5, and dust-exhausting port 5 lower end is connected with elastic turbine 6.
Drum 12 includes body 121 and is positioned at the central tube 122 of body 121, and central tube 122 is U-tube, multiple U-shapeds
Pipe is distributed in drum 12, drum 12 both sides be provided with thermal medium import 18 and thermal medium outlet 19 respectively with the first heating agent
Medium tube 20 and the second thermal medium pipe 21 connect, and central tube 122 is by the first thermal medium pipe 20 and the second thermal medium
21 connect with fin heat exchange pipe 7, can be through the first thermal medium pipe after the thermal medium in fin heat exchange pipe 7 is heated vaporization
20, and enter in central tube 122 via thermal medium import 18, with the water heat exchange in drum 12 after, thermal medium is cold
But via thermal medium outlet 19 inflow the second thermal medium pipes 21, and then recycle in flowing back to tuberculated pipe 7.Drum
Thermometer 14, Pressure gauge 15 and liquid level gauge 16, thermometer 14 preferably thermal resistance thermometer, thermometer it is additionally provided with on 12
14 insert drums 12 in measure the temperature of water, Pressure gauge 15 measures the pressure of steam, liquid level in drum 12 in inserting drum 12
The water level of water is measured, it is simple to add water in time and draining in meter 16 insertion drum 12.It is additionally provided with water inlet 13 on drum 12 and goes out
The mouth of a river 17, the water for low temperature enters central tube 122 respectively, and heated after the water of high temperature flow out central tube 122.In this reality
Executing in example, water added in drum 12 is hot water, and after thermal medium heat exchange therewith, water absorbs heat and becomes steam, from delivery port
17 discharge, and for heating etc., thermometer 14 is the temperature of steam in measuring drum 12, controls the water yield, it is simple to add water,
Pressure gauge 15 is for measuring the pressure of steam, and described liquid level gauge 16, for monitoring the water level of water, prevents lack of water.Implement at other
In example, the water in drum 12 is also cold water, heats cold water so that it is become hot water or warm water, be used for after thermal medium heat exchange therewith
For operation before aluminum oxide or hot water needed for being supplied to user.
The method reclaimed Aluminium hydroxide roasting furnace flue gas exhaust heat and aluminium hydroxide below is been described by:
A. before baking furnace fume is cooled down, water pump is first opened, by water inlet 13 toward after being filled with a certain amount of water in drum 12
Stop water pump.
B. open alumina roasting furnace after having performed above-mentioned action and baking furnace fume entered in heat exchanger 1 by gas approach 3,
In heat exchanger 1, the heat smoke of 160～170 DEG C is flowed out into by exhanst gas outlet 4 after carrying out indirect heat exchange with fin heat exchange pipe 7
The blower fan of roaster is discharged into air.Indirect heat exchange herein refers to that baking furnace fume is carried out with the thermal medium in fin heat exchange pipe 7
Heat exchange, owing to thermal medium temperature is higher, can vaporize when heat exchange, and therefore flue gas will not be at fin during heat exchange in heat exchanger 1
The surface of radiating tube 7 produces dew condensation phenomenon, it is to avoid with water with described baking furnace fume at described fin heat exchange pipe 7 surface heat exchanging
Time the dew that is condensed out drip and be combined the surface being bonded to described fin heat exchange pipe 7 with aluminium hydroxide, affect heat transfer effect, while also keep away
The dew having exempted from sulfur-bearing drips the described fin heat exchange pipe 7 of corrosion and described heat exchanger 1.By first after the heated vaporization of thermal medium
Thermal medium pipe 20, thermal medium import 18 enter in central tube 122, carry out indirect heat exchange with the water in drum 12, cold
But the thermal medium after flows back in fin heat exchange pipe 7 by thermal medium outlet the 19, second thermal medium pipe 21, through reciprocal
Water in circulation drum 12 is heated to be vaporized into water vapour and flows out drum 12 by delivery port 17 and be sent to user, it is achieved heat recovery,
Do not result in energy waste.Measure the water level in drum 12 with timely amount of makeup water by liquid level gauge 16 simultaneously.
C. after heat exchanger 1 runs certain time, fin heat exchange pipe 7 can be attached with substantial amounts of aluminium-hydroxide powder, impact is changed
Thermal effect.Now open impulse electromagnetic valve 9, the compressed air in compressed air reservoir 10 can move quickly through compressed air hose 11,
Impulse electromagnetic valve 9, the shower nozzle of compressed air blowback device 8, the impulse wave of generation acts on aluminium hydroxide on fin heat exchange pipe 7
Powder blows off, and partial aluminum hydroxide powder is discharged into air with flue gas by blower fan, and major part aluminium hydrate powder falls into the row of shell 2 bottom
In dirt pipe 5.
D. when accumulating in dust flue 5, a certain amount of aluminium hydrate powder is last to be cleared up, and now starts elastic turbine 6, hydrogen
Alumina powder is discharged outside heat exchanger 1 through dust flue 5, elastic turbine 6, and user recycles, and decreases the wasting of resources.
The flue-gas temperature that the baking furnace fume waste-heat recovery device using the present invention discharges after reclaiming heat can drop to 120 DEG C, every t
The heat of the recyclable 57620kCal of aluminum oxide, produces 47Mt aluminum oxide per year by China in 2014, and recyclable 2.71 × 1012kcal
Heat, folding standard coal be 386877 tons, the most recyclable 3800t aluminium hydroxide, Social benefit and economic benefit is notable.
Therefore, the baking furnace fume waste-heat recovery device heat exchange efficiency of the present invention is high, and can prevent fin heat exchange pipe outer surface from condensing,
Anti-dew drips corrosion, and can reclaim major part aluminium-hydroxide powder, the convenient advantage of deashing.
Above example is only in order to illustrate technical scheme and unrestricted, although carrying out the present invention with reference to preferred embodiment
Describe in detail, it will be appreciated by those skilled in the art that and technical scheme can be modified or equivalent,
Without deviating from objective and the scope of the technical program, it all should be contained in scope of the presently claimed invention.
Claims (6)
1. a baking furnace fume waste-heat recovery device, it is characterised in that including: heat exchanger and drum, sets in described heat exchanger
Having fin heat exchange pipe, fill thermal medium in described fin heat exchange pipe, described fin heat exchange pipe is by thermal medium pipe and described vapour
Bag connection, described drum has body and is positioned at described intrinsic central tube, described internal filling water, described central tube with
Described thermal medium pipe connects, and described central tube, described thermal medium pipe and described fin heat exchange pipe three are tightly connected, and interior
Portion is in vacuum state, baking furnace fume in described heat exchanger with the heat exchange of described thermal medium, then thermal medium is in institute
Water secondary heat exchange in stating central tube and in described drum, the lower section of described fin heat exchange pipe is provided with dust flue, described dust flue one
Side connects flexible turbine, and the aluminium-hydroxide powder in described dust flue is discharged outside described heat exchanger by described elastic turbine.
Baking furnace fume waste-heat recovery device the most according to claim 1, it is characterised in that: described fin heat exchange pipe is provided with many
Individual, in laterally side by side and vertical multiple row row sets, and it is fixed in described heat exchanger internal stent.
Baking furnace fume waste-heat recovery device the most according to claim 1, it is characterised in that: described heat exchanger also includes compression
Air blowback device, described compressed air blowback device includes the shower nozzle of multiple rows of multiple row injection high velocity air, and described shower nozzle is corresponding to described
The fin of fin heat exchange pipe.
Baking furnace fume waste-heat recovery device the most according to claim 3, it is characterised in that: described heat exchanger also includes arteries and veins
Rushing magnetic valve, compressed air reservoir and compressed air hose, described compressed air blowback device passes through impulse electromagnetic valve, compressed air hose
Connect with described compressed air reservoir.
Baking furnace fume waste-heat recovery device the most according to claim 1, it is characterised in that: it is additionally provided with heat on described drum
Medium import and thermal medium outlet connect with described thermal medium pipe respectively, pass in and out described central tube for described thermal medium,
Being additionally provided with thermometer, Pressure gauge and liquid level gauge on described drum, described thermometer is for measuring the temperature in described drum, described
Pressure gauge is the pressure of steam in measuring described drum, and the water level of water measured by described liquid level gauge in entering described drum.
6. a baking furnace fume exhaust heat recovering method, it is characterised in that including:
A. in fin heat exchange pipe, fill thermal medium, and vacuumize；
B. a certain amount of water is injected in drum；
C. open Aluminium hydroxide roasting stove, baking furnace fume is passed through in heat exchanger, described baking flue gas in described heat exchanger with
The fin heat exchange pipe arranged in it carries out heat exchange, and the thermal medium in described fin heat exchange pipe is vaporized entrance institute after a heat exchange
Stating in the central tube of drum, and carry out secondary heat exchange with the water in described drum, after secondary heat exchange, liquefaction returns described fin heat exchange
In pipe, water is heated for reclaiming simultaneously；
D. after repeatedly heat exchange, described fin heat exchange pipe adheres to substantial amounts of aluminium-hydroxide powder, now open and described fin
The impulse electromagnetic valve that heat exchanger tube connects, makes the compressed air in compressed air reservoir through compressed air hose, impulse electromagnetic valve and pressure
The shower nozzle of contracting air blowback device, produces impulse wave and blows off described aluminium-hydroxide powder into dust flue；
E. last when accumulating a certain amount of described aluminium hydrate powder in dust flue, start elastic turbine by aluminium-hydroxide powder from institute
State dust flue is discharged and reclaim outside described heat exchanger.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510141167.4A CN104697348B (en) | 2015-03-27 | 2015-03-27 | Baking furnace fume waste-heat recovery device and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510141167.4A CN104697348B (en) | 2015-03-27 | 2015-03-27 | Baking furnace fume waste-heat recovery device and method |
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| CN104697348A CN104697348A (en) | 2015-06-10 |
| CN104697348B true CN104697348B (en) | 2016-09-07 |
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| CN113446862A (en) * | 2020-03-24 | 2021-09-28 | 沈阳铝镁设计研究院有限公司 | Flue gas waste heat recovery device for aluminum hydroxide roasting furnace |
| CN113521978A (en) * | 2021-06-29 | 2021-10-22 | 上海华励振环保科技有限公司 | ICR dry powder denitration device with waste heat collecting function |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201242383Y (en) * | 2008-06-20 | 2009-05-20 | 王云龙 | Dual-purpose phase change heat exchanger for vapor and water |
| CN101324408B (en) * | 2008-08-04 | 2010-06-02 | 中国铝业股份有限公司 | Flue gas waste heat recovery method of aluminum oxide gaseous state suspending calcining furnace |
| CN201517767U (en) * | 2009-08-19 | 2010-06-30 | 深圳中兴科扬节能环保股份有限公司 | Smoke gas waste heat recovery system |
| CN201885590U (en) * | 2010-12-15 | 2011-06-29 | 湖南思为能源环保有限公司 | Aluminum oxide low-temperature flue gas waste heat heating and evaporation stock solution device |
| DE102010063839A1 (en) * | 2010-12-22 | 2012-06-28 | Sms Siemag Ag | Method for operating a furnace in a metalworking plant and metalworking plant |
| CN201935588U (en) * | 2011-01-10 | 2011-08-17 | 中南大学 | Flue gas waste heat recovery device for alumina gaseous suspension roaster |
| CN202927865U (en) * | 2012-11-17 | 2013-05-08 | 潍坊中阳机械科技有限公司 | Waste heat recovery device |
| CN203771429U (en) * | 2014-04-01 | 2014-08-13 | 项海林 | Compressed air pulse soot blower |
| CN204514081U (en) * | 2015-03-27 | 2015-07-29 | 沈阳鑫博工业技术股份有限公司 | Baking furnace fume waste-heat recovery device |
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Denomination of invention: Burner flue gas waste heat recovery device and method Effective date of registration: 20220815 Granted publication date: 20160907 Pledgee: China Construction Bank Corporation Shenyang Free Trade Zone Sub-branch Pledgor: SHENYANG XINBO INDUSTRIAL TECHNOLOGY Co.,Ltd. Registration number: Y2022210000112 |
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Date of cancellation: 20230915 Granted publication date: 20160907 Pledgee: China Construction Bank Corporation Shenyang Free Trade Zone Sub-branch Pledgor: SHENYANG XINBO INDUSTRIAL TECHNOLOGY Co.,Ltd. Registration number: Y2022210000112 |