CN102183087B - Condensation-type flue gas waste heat recovery unit and method based on cyclones - Google Patents
Condensation-type flue gas waste heat recovery unit and method based on cyclones Download PDFInfo
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- CN102183087B CN102183087B CN201110057501XA CN201110057501A CN102183087B CN 102183087 B CN102183087 B CN 102183087B CN 201110057501X A CN201110057501X A CN 201110057501XA CN 201110057501 A CN201110057501 A CN 201110057501A CN 102183087 B CN102183087 B CN 102183087B
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- flue gas
- whirlwind cyclone
- heat recovery
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- condensed water
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
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Abstract
The invention discloses a condensation-type flue gas waste heat recovery unit and method based on cyclones. The condensation-type flue gas waste heat recovery unit comprises a cooling box provided with a cooling liquid inlet and a cooling liquid outlet; a flue gas collector is arranged above the cooling box; a condensate collector is arranged below the cooling box; a plurality of vertical cyclones are arranged inside the cooling box; and the top end of each cyclone is communicated with the flue gas collector, the bottom end of each cyclone is communicated with a condensed water collector, and the side wall of each cyclone is connected with an air inlet pipe which penetrates the wall of the cooling box and is tangent to the side wall of the cyclone. The cyclones of the basic heat exchanging unit of the condensation-type flue gas waste heat recovery unit disclosed by the invention can effectively separate dust particles from condensed water in the flue gas and remove the dust particles and condensed water in time, not only ensures clean heat exchanging surface, but also plays a certain role of removing dust from the exhausted flue gas, thus condensation-type waste heat utilization of dust-containing flue gas can be realized, and the energy in the flue gas is utilized to the maximum extent.
Description
Technical field
The present invention relates to a kind of heat-exchange device, relate in particular to a kind of condensed flue gas waste-heat recovery device and method based on Whirlwind cyclone.
Background technology
At present, for the patent of the coagulating type heat recovery device of flue gas and technology mostly only for flue gas relatively cleaner fuel oil or gas fired-boiler, for using the solid-fuelled boilers such as coal or living beings, owing to contain a large amount of flying dust grits in the flue gas, in the coagulating type residual heat using device of conventional design, these grits and condensate water very easily cause heating surface to stain, and cause flue blockage, and the equipment that affects normally moves.
On the other hand, sustainable growth and combustion technology progress along with energy demand, high moisture brown coal, various mud, agriculture and forestry organic waste material etc. become boiler oil more and more, often contain a large amount of moisture in these solid fuels, steam share in the flue gas is very high, the potentiality of coagulating type UTILIZATION OF VESIDUAL HEAT IN are very large, and traditional flue gas waste heat utilization device can only utilize the part sensible heat in the flue gas, often are difficult to reach the energy-saving effect of expection.
Summary of the invention
The invention provides high, good to the waste heat recovery effect of the high concentration ash-laden gas condensed flue gas waste-heat recovery device of a kind of heat exchange efficiency, solved the problem that existing coagulating type flue gas waste heat recovery apparatus can not be applied to reclaim steam gasification latent heat in the ash-laden gas that solid fuel ignition produces.
A kind of condensed flue gas waste-heat recovery device based on Whirlwind cyclone, comprise the cooler bin with cooling liquid inlet and cooling liquid outlet, the cooler bin top is provided with the flue gas manifold, the below is provided with apparatus for collecting condensed water, it is characterized in that, cooler bin inside is provided with the Whirlwind cyclone of some vertical settings, each Whirlwind cyclone top is communicated with the flue gas manifold, and the bottom is communicated with apparatus for collecting condensed water, and sidewall is connected with the air inlet pipe of passing cooler bin tank wall tangent with it.
The quantity of the Whirlwind cyclone in the cooler bin can arrange according to actual needs, and they can independently arrange, also can be in parallel, the mode of series connection or series-parallel connection in groups, to improve flue gas treating capacity and heat recovery rate effect.
Described Whirlwind cyclone comprises body cylindraceous, the radially reducing and be connected with condensed water discharge pipe of body bottom, and the top is connected with escape pipe, and air inlet pipe and bodies top sidewall are tangent.
During work, flue gas is tangentially introduced Whirlwind cyclone inside with certain speed, make air-flow form therein high speed rotary motion, adherent mobile flue gas is isolated the grit in the flue gas on the one hand, on the other hand owing to cooled off condensing of beginning steam, and carrying out the coagulating type heat exchange with wall, the air motion in the Whirlwind cyclone the most at last solid phase grit and condensate water is discharged from Whirlwind cyclone simultaneously.
Cooling liquid inlet is located at the bottom of cooler bin, cooling liquid outlet is located at the top of cooler bin, and cooling medium is liquid coolant, can carry out faster heat exchange, promptly will be immersed in the exchange heat of Whirlwind cyclone wall and carry out, to greatest extent the heat in the recovered flue gas.
The inlet end of all air inlet pipe pools together the formation smoke air inlet, and convenient processing also realizes the uniform distribution of flue gas flow simultaneously easily.The outlet side of air inlet pipe is the reducing setting.
The present invention also provides a kind of method of utilizing the Whirlwind cyclone Mist heat recovering, comprising:
The Whirlwind cyclone body is placed cooling fluid, Whirlwind cyclone bottom and top are in communication with the outside, the flue gas that will contain flue dust and steam is tangentially introduced in the Whirlwind cyclone from Whirlwind cyclone body sidewall, discharges from the top after flue gas and the cooling fluid heat exchange, and condensed water and flue dust are discharged from the bottom.
Preferably, tangentially to introduce speed be 10～60m/s to described flue gas.Described coolant temperature is lower than 80 ℃.Described flue-gas temperature is higher than 100 ℃.Can guarantee to remove most of flue dust and steam, reach the purpose of abundant heat exchange.
Ash-laden gas for the solid fuel ignition generation, conventional flue gas waste heat utilization device can only utilize the sensible heat of flue gas, condense into water and the latent heat of vaporization that discharges can't be utilized for steam in the flue gas, and apparatus of the present invention can realize the coagulating type UTILIZATION OF VESIDUAL HEAT IN to ash-laden gas, maximally utilise the energy in the flue gas.
Heat exchange elementary cell Whirlwind cyclone in the coagulating type residual heat using device of the present invention can also in time exclude the grit in the flue gas and condensed water effective separation effectively, not only guarantees the cleaning of heat exchange surface, can also play certain dustproof function to the flue gas of discharging.If contain harmful vapor phase contaminants soluble in water such as HCl in the flue gas, in apparatus of the present invention, also can obtain significant removal effect.
Description of drawings
Fig. 1 is the structural representation of waste-heat recovery device of the present invention;
Fig. 2 is the structural representation of Whirlwind cyclone of the present invention;
Fig. 3 is Whirlwind cyclone plan structure schematic diagram shown in Figure 2.
The specific embodiment
As shown in the figure, a kind of condensed flue gas waste-heat recovery device based on Whirlwind cyclone comprises cooler bin 8, and cooler bin 8 bottoms are provided with cooling liquid inlet 3, and the top is provided with cooling liquid outlet 6, and cooling liquid inlet 3 and cooling liquid outlet 6 are positioned at the relative both sides of cooler bin 8.Cooler bin 8 tops are provided with flue gas manifold 4, and the below is provided with apparatus for collecting condensed water 9, and flue gas manifold 4 is provided with exhanst gas outlet 5.Cooler bin 8 inside are provided with the Whirlwind cyclone 7 of vertical setting.
Whirlwind cyclone 7 comprises body 12 cylindraceous, the radially reducing of body 12 bottoms, and the bottom is connected with condensed water discharge pipe 10, and the top is connected with escape pipe 11.Wherein escape pipe 11 is communicated with flue gas manifold 4, and condensed water discharge pipe 10 is communicated with apparatus for collecting condensed water 9.The quantity of Whirlwind cyclone 7 is 4, becomes parallel-connection structure to arrange, all air inlet pipe 1 inlet end ends pool together and form smoke air inlet 2, communicate with supplying the cigarette source, and air inlet pipe 1 outlet side is the reducing setting, and tangent with body 12 top sidewalls.
The said apparatus operation principle is as follows:
From the flue gas of smoke air inlet 2 in air inlet pipe 1 tangentially enters Whirlwind cyclone 7, move downward along body 12 spiral inner walls, in this process, liquid medium in flue gas and the cooler bin 8 is by the abundant heat exchange of Whirlwind cyclone 7 sidewalls, steam in the cooling procedure in the flue gas condenses into water, with the grit in the flue gas, under centrifugal action, flow into apparatus for collecting condensed water 9 along body 12 inwalls through condensed water discharge pipe 10, the flue gas and the condensate water that tangentially enter Whirlwind cyclone 7 are constantly washed away body 12 inwalls, can prevent grit from sticking on body 12 inwalls and cause heat exchange to be obstructed or Whirlwind cyclone 7 stops up, cooled flue gas is in escape pipe 11 is pooled to flue gas manifold 4, and the exhanst gas outlet 5 of flowing through is discharged.
Describe the most preferred embodiment of the condensed flue gas waste-heat recovery device based on Whirlwind cyclone of the present invention in detail referring to Fig. 1.
The flue-gas temperature of this embodiment air inlet 2 is 180 ℃, flying dust concentration 150mg/m
3, steam volume content 20%, cooling medium are cold oil, its import 3 temperature are 20 ℃.Flow velocity be the flue gas of 35m/s in air inlet pipe 1 tangentially enters Whirlwind cyclone 7, move downward along body 12 spiral inner walls.Whirlwind cyclone 7 body height are 35cm, and internal diameter is 12cm, and quantity is 4, and parallel connection is arranged in cooler bin.Enter flue gases in the Whirlwind cyclone 7 in motion process by the abundant heat exchange of fluid oil in Whirlwind cyclone 7 sidewalls and the cooler bin 8.Finally, about 80 ℃ of exhanst gas outlet 5 temperature, about 120 ℃ of cooling-oil outlet 6 temperature, flue gas flying dust concentration is less than 3mg/m
3Under such temperature, the steam in the flue gas has condensed into water, and condensate water is constantly washed away the grit that sticks on body 12 inwalls, along with grit together, under centrifugal action, flow into apparatus for collecting condensed waters 9 along body 12 inwalls through condensed water discharge pipe 10.Cold oil temperature after heat exchange is higher, can be other equipment heat is provided, thereby reach the effect of flue gas heat recovery.
Claims (7)
1. condensed flue gas waste-heat recovery device based on Whirlwind cyclone, the cooler bin (8) that comprises band cooling liquid inlet (3) and cooling liquid outlet (6), cooler bin (8) top is provided with flue gas manifold (4), the below is provided with apparatus for collecting condensed water (9), it is characterized in that, cooler bin (8) inside is provided with the Whirlwind cyclone (7) of some vertical settings, each Whirlwind cyclone (7) top is communicated with flue gas manifold (4), the bottom is communicated with apparatus for collecting condensed water (9), and sidewall is connected with the air inlet pipe (1) of passing cooler bin (8) tank wall tangent with it; The outlet side of described air inlet pipe (1) is the reducing setting.
2. condensed flue gas waste-heat recovery device according to claim 1 is characterized in that, described cooling liquid inlet (3) is located at the bottom of cooler bin (8), and cooling liquid outlet (6) is located at the top of cooler bin (8).
3. condensed flue gas waste-heat recovery device according to claim 1 is characterized in that, the inlet end of described air inlet pipe (1) pools together and forms smoke air inlet (2).
4. condensed flue gas waste-heat recovery device according to claim 1, it is characterized in that, described Whirlwind cyclone comprises body cylindraceous (12), the radially reducing and be connected with condensed water discharge pipe (10) of body (12) bottom, the top is connected with escape pipe (11), and air inlet pipe (1) is tangent with body (12) top side wall.
5. method of utilizing the Whirlwind cyclone Mist heat recovering comprises:
The Whirlwind cyclone body is placed cooling fluid, Whirlwind cyclone bottom and top are in communication with the outside, the flue gas that will contain flue dust and steam is tangentially introduced in the Whirlwind cyclone from Whirlwind cyclone body sidewall, discharges from the top after flue gas and the cooling fluid heat exchange, and condensed water and flue dust are discharged from the bottom; The speed that flue gas is tangentially introduced Whirlwind cyclone is 10-60m/s.
6. method according to claim 5 is characterized in that, described coolant temperature is lower than 80 ℃.
7. method according to claim 5 is characterized in that, described flue-gas temperature is 100～350 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110057501XA CN102183087B (en) | 2011-03-10 | 2011-03-10 | Condensation-type flue gas waste heat recovery unit and method based on cyclones |
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| CN201110057501XA CN102183087B (en) | 2011-03-10 | 2011-03-10 | Condensation-type flue gas waste heat recovery unit and method based on cyclones |
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| CN102183087A CN102183087A (en) | 2011-09-14 |
| CN102183087B true CN102183087B (en) | 2013-01-16 |
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| CN107421342A (en) * | 2017-08-08 | 2017-12-01 | 无锡雪浪环境科技股份有限公司 | Clean heat exchange type flue gas cooling device |
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| HU193160B (en) * | 1983-04-18 | 1987-08-28 | Prizma Tervezoe Sz | Flue gas producing apparatus of cyclone system |
| DE3606681A1 (en) * | 1986-02-27 | 1986-10-09 | Mannesmann AG, 4000 Düsseldorf | METHOD AND DEVICE FOR RECOVERY OF EXHAUST WATER ENERGY |
| CN2684125Y (en) * | 2004-03-22 | 2005-03-09 | 孙伟东 | Novel fume cleaning and dedusting device utilizing waste heat |
| CN100552319C (en) * | 2006-08-29 | 2009-10-21 | 长沙恒宇节能环保科技有限公司 | A kind of smoke canal flue gas waste heat recovery device |
| CN201476302U (en) * | 2009-07-24 | 2010-05-19 | 北京金房暖通节能技术有限公司 | Efficient boiler fume waste-heat recovery device |
| CN101813423B (en) * | 2010-03-19 | 2012-05-30 | 昆明阳光基业股份有限公司 | Apparatus for recovering residual heat from tail gas of closed calcium carbide furnace |
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