CN103486603B - A kind of flue gas processing device and processing method - Google Patents

A kind of flue gas processing device and processing method Download PDF

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Publication number
CN103486603B
CN103486603B CN201310474283.9A CN201310474283A CN103486603B CN 103486603 B CN103486603 B CN 103486603B CN 201310474283 A CN201310474283 A CN 201310474283A CN 103486603 B CN103486603 B CN 103486603B
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flue gas
heat
exchange unit
former
heat pipe
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CN103486603A (en
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吴凯
郑文胜
翟艳丽
冯彦明
甘洁
王海洋
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EVERBRIGHT ENVIRONMENTAL ENERGY (SUZHOU) Ltd
Everbright Environmental Protection China Co Ltd
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EVERBRIGHT ENVIRONMENTAL ENERGY (SUZHOU) Ltd
Everbright Environmental Protection China Co Ltd
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Abstract

The present invention relates to a kind of flue gas processing device and processing method, comprise: the flue gas washing tower being communicated with chimney, it is characterized in that, described device also comprises the flue gas heat-exchange unit being arranged between described flue gas washing tower and described chimney, the former gas approach of described flue gas heat-exchange unit is connected with former flue, the former exhanst gas outlet of described flue gas heat-exchange unit is connected with the bottom of described flue gas washing tower, and the cold flue gas import of described flue gas heat-exchange unit is connected with the top of described flue gas washing tower; Described flue gas heat-exchange unit is selected hot-tube flue gas exchanger, and wherein, described flue gas heat-exchange unit body interior is vertically set side by side with many heat pipes, and described heat pipe is in tilted layout, and the angle on described heat pipe and ground is 25 °-35 °; Described heat pipe body middle part is provided with dividing plate, and described heat pipe body is divided into former exhaust gases passes and cold flue gas passage by described dividing plate, and described heat pipe is coated with organosilicon on surface. Device of the present invention has reached the effect of eliminating white water steam.

Description

A kind of flue gas processing device and processing method
Technical field
The present invention relates to one and be applied in flue gas process field, be specifically related to a kind of flue gas processing device andProcessing method, is applied to the flue gas processing dress that consumer waste incineration power plant and various boiler combustion producePut and method.
Background technology
Along with going from bad to worse of ecological environment, being treated as of rubbish thought one of problem of paying close attention to, rawThe rubbish of living is the solid waste producing in mankind's daily life and production, because discharge rate is large, and compositionComplicated various, bring difficulty to disposal and utilization, as do not processed in time or deal with improperly, will be dirtyDye environment, affect environmental sanitation. Garbage disposal will be removed rubbish rapidly exactly, and carries out innoxiousProcess, finally reasonably utilize. The waste disposal method of current extensive use be sanitary landfills,During High-Temperature Composting and burning. The object of garbage disposal is innoxious, resource and minimizing.
In Refuse Incineration Process, can produce a large amount of flue gases, need to process to described flue gas oneAs tail gas after consumer waste incineration first carry out depickling dedusting, after depickling dedusting, discharge in flue gas containing largeWater gaging steam, contacts chance condensation and forms numerous little droplet with atmosphere, produce white water vapour, easilyMisread into poisonous smog by surrounding resident, thereby cause psychology fear to wait harmful effect.
In prior art, first flue gas is carried out to depickling, in deacidification, conventionally sprays depickling spray,By the acid gas removal in flue gas, in this spray process, make described flue gas temperature reduce and be easy to reachTo dewfall point, the corrosion of making twin conduit.
Therefore, although in prior art, can remove the sour gas in flue gas and dust,But in the processing procedure of flue gas, be difficult to control described flue gas and do not form white water vapour, be also difficult toPrevent that described smoke condensation from corroding described pipeline, thus need to smoke processing system and method do intoThe improvement of one step, to eliminate the problems referred to above.
Summary of the invention
The concept of having introduced a series of reduced forms in summary of the invention part, this will be in specific embodiment partyIn formula part, further describe. Summary of the invention part of the present invention not meaning that will attempt to limitGo out key feature and the essential features of technical scheme required for protection, more do not mean that and attempt reallyThe protection domain of fixed technical scheme required for protection.
The invention provides a kind of flue gas processing device, comprising: the flue gas washing tower being communicated with chimney,It is characterized in that, described device also comprises the cigarette being arranged between described flue gas washing tower and described chimneyGas heat exchanger, the former gas approach of described flue gas heat-exchange unit is connected with former flue, and described flue gas changesThe former exhanst gas outlet of hot device is connected with the bottom of described flue gas washing tower, the cold smoke of described flue gas heat-exchange unitGas import is connected with the top of described flue gas washing tower;
Described flue gas heat-exchange unit is selected hot-tube flue gas exchanger, wherein, and in described flue gas heat-exchange unit main bodyPortion is vertically set side by side with many heat pipes, and described heat pipe is in tilted layout, described heat pipe and groundAngle be 25 °-35 °;
Described heat pipe body middle part is provided with dividing plate, and it is logical that described heat pipe body is divided into former flue gas by described dividing plateRoad and cold flue gas passage, described heat pipe is coated with organosilicon on surface.
As preferably, the main body surfaces externally and internally of described flue gas heat-exchange unit is provided with polytetrafluoroethylmaterial materialLayer.
As preferably, be provided with drainpipe in the bottom of described former exhaust gases passes and cold flue gas passage, useIn blowdown.
As preferably, in described flue gas heat-exchange unit, on the top cover of main body and base plate, be provided with hole, described inBetween hole and described heat pipe, be provided with encapsulant.
As preferably, between the top cover of described flue gas heat-exchange unit main body and described heat pipe, be provided with spring.
As preferably, described heat pipe top is also provided with heating rod.
As preferably, described device also comprises flue gas heat-exchange unit support frame, for supporting described flue gasHeat exchanger.
The present invention also provides a kind of flue gas processing method of above-mentioned flue gas processing device, comprises following stepRapid:
(1) former flue gas carries out heat exchange with cold flue gas after entering flue gas heat-exchange unit, described former flue-gas temperatureBe down to 103 DEG C;
(2) in step (1), the former flue gas after heat exchange enters in flue gas washing tower, makes described cigarettePart water condensation in gas, reduces its saturation degree simultaneous temperature and is further down to 48 DEG C, becomes cold flue gas;
(3) after the cold flue gas in step (2) enters described flue gas heat-exchange unit, carry out heat exchange, temperatureBe increased to 110 DEG C, become unsaturated steam, finally by smoke stack emission.
As preferably, when described device brings into operation, first pass into cold flue gas, and then pass into former cigaretteGas.
In the present invention by one of flue gas heat-exchange unit (GGH) is set after boiler induced-draft fan, by cigarette temperatureBe down to 103 DEG C, make part hydrogenesis in flue gas out by flue gas washing tower circulated sprinkling, warpScrubbing tower flue gas after treatment is again by GGH16 heat exchange. Flue gas is heated to 110 DEG C by 48 DEG C. AddFlue gas after heat finally enters atmosphere through air outlet and chimney again.
Because the low-temperature flue gas after purifying is the saturated vapor of 48 DEG C out time from flue gas washing tower, pass through cigaretteGas heat exchanger becomes unsaturated vapour after being heated to 110 DEG C, then in the time that air outlet and chimney are discharged at chimneyExit contacts cooling with atmosphere. Along with rapid diffusion, the cooling of flue gas in atmosphere, now at cigaretteChimney outlet can not form white water steam, has reached the effect of eliminating white water steam.
Brief description of the drawings
Following accompanying drawing of the present invention is used for understanding the present invention in this as a part of the present invention. In accompanying drawingShow embodiments of the invention and description thereof, be used for explaining principle of the present invention. In the accompanying drawings,
Fig. 1 shows the structural representation of flue gas processing device of the present invention;
Fig. 2 shows the front view of GGH structure in flue gas processing device of the present invention;
Fig. 3 shows the gas approach of GGH and the knot of outlet in flue gas processing device of the present inventionThe front view of structure;
Fig. 4 shows the side view of GGH structure in flue gas processing device of the present invention;
Fig. 5 shows the cutaway view of GGH structure in flue gas processing device of the present invention.
Accompanying drawing mark
1, former gas approach 2, former exhanst gas outlet 3, cold flue gas import
4, cold flue gas outlet 5, flue gas heat-exchange unit main body 6, support frame
7, heat pipe 8, top cover 9, bolt
10, heating rod 11, spring 12, drainpipe
13, pipe clamp 14, flue gas washing tower 15, air-introduced machine
16, flue gas heat-exchange unit 17, chimney
Detailed description of the invention
In the following description, a large amount of concrete details have been provided to provide more thorough to the present inventionUnderstanding. But, it will be apparent to one skilled in the art that the present invention can be withoutOne or more these details and being implemented. In other example, for fear of sending out with the present inventionLife is obscured, and is not described for technical characterictics more well known in the art.
Below by embodiment also by reference to the accompanying drawings, technical scheme of the present invention is illustrated.
The present invention exists steam in discharge flue gas too much to form white water steaming in order to solve in prior artThe problem of gas, provides a kind of Novel flue gas treating apparatus, as shown in the structural representation of Fig. 1, and instituteState device and comprise flue gas washing tower 14, chimney 17, described device also comprises and is arranged at described flue gas washingFlue gas heat-exchange unit 16 between tower 14 and described chimney 17, wherein said flue gas heat-exchange unit 16 formerGas approach is connected with former flue, the former exhanst gas outlet of described flue gas heat-exchange unit 16 and described flue gasThe bottom of scrubbing tower 14 is connected, the cold flue gas import of described flue gas heat-exchange unit and described flue gas washing tower14 top is connected, and the cold flue gas outlet of described flue gas heat-exchange unit 16 is connected with described chimney 17.
As preferably, the cold flue gas import of described flue gas heat-exchange unit 16 and described flue gas washing tower 14Between top, be provided with air-introduced machine 15, aspirating from described flue gas washing tower 14 cold flue gas outTo described flue gas heat-exchange unit 16. In addition the former gas approach of described flue gas heat-exchange unit and former fume pipe,Between road, be also provided with air-introduced machine (in figure for illustrating), described in introducing for the former flue gas that boiler is producedIn flue gas heat-exchange unit 16, carry out heat exchange.
In the present invention by 16 1 of flue gas heat-exchange units (GGH) are set after boiler induced-draft fan 15,By cigarette temperature drop to 103 DEG C, make the part hydrogenesis in flue gas by flue gas washing tower 14 circulated sprinklingsOut, pass through again GGH16 heat exchange through scrubbing tower flue gas after treatment. Flue gas is heated to 110 by 48 DEG CDEG C. Flue gas after heating finally enters atmosphere through air outlet and chimney again.
Because the low-temperature flue gas after purifying is the saturated vapor of 48 DEG C out time from flue gas washing tower, pass through cigaretteGas heat exchanger 16 becomes unsaturated vapour after being heated to 110 DEG C, then in the time that air outlet and chimney 17 are dischargedContact cooling with atmosphere in chimney 17 exits. Along with rapid diffusion, the cooling of flue gas in atmosphere,Now export and can not form white water steam at chimney 17, reached the effect of eliminating white water steam.
Below in conjunction with Fig. 2-Fig. 5, device of the present invention is described further.
First the flue gas washing tower 14 in described device is provided with packing layer, and described packing layer is divided into twoSection, centre arranges apparatus for redistributing, and after redistribution, spray is to lower floor's filler, and interior packing layer is doneFor the mass transfer apparatus of gas-liquid two-phase Contact member. Supporting plate is equipped with in packed tower bottom, filler withThe mode of huddling is placed on support plate. Hold-down grid is installed in the top of filler, in case blown by ascending airMoving. Spray column spray liquid sprays filler through liquid distribution trough from tower top, and flows down along filling surface.
Flue gas is introduced flue gas washing tower 14 by pipeline, and through packing layer, waste gas and alkaline absorption solution carry outGas-liquid two-phase fully contacts absorption neutralization reaction, and flue gas is after purifying, then through demist plate dehydrating demistingAfter enter described GGH16 by blower fan. As preferably, absorption liquid at the bottom of tower after water pump supercharging at tower topSpray and under, recycle at the bottom of being finally back to tower.
Wherein, described flue gas heat-exchange unit 16 is selected hot-tube flue gas exchanger, and heat pipe is that one has high biographyThe heat transfer element of hot property, carrys out transferring heat by the latent heat of phase change of working media in shell, its heat transferPerformance is similar to superconductor electric conductivity, and therefore, it is strong that it has heat-transfer capability, the spy that heat transfer efficiency is highPoint.
Heat pipe GGH can control the wall surface temperature of heat pipe, thereby can avoid to a certain extent cigaretteGas low-temperature dew point corrosion, the long-term operation safety of guarantee waste heat recovery apparatus. As further excellentChoosing, the surfaces externally and internally of described heat pipe GGH main body all sprays polytetrafluoroethylene (PTFE) material layer,To increase anticorrosion reliability.
That described polytetrafluoroethylene (PTFE) material layer has is high temperature resistant, corrosion-resistant, weatherability, Gao RunCunning, nonhazardous, do not adhere to, the characteristic such as non-oxidizability, it uses operating temperature to reach 250 DEG C. MeltingTemperature is 327~342 DEG C, has good mechanical tenacity; Drop temperature to-196 DEG C, also canKeep 5% percentage elongation, to most of chemicals and solvent, show inertia, ability strong acid is strongAlkali, water and various organic solvent, have aging life-span best in plastics; PTFE is in solid materialCoefficient of friction the lowest; There is physiology inertia, implant for a long time invariably as artificial blood vessel and internal organsGood reaction; Be surface tension minimum in solid material, do not adhere to any material; Due to Pintsch processTime also produce hypertoxic accessory substance fluorophosgene and perfluoroisobutylene etc., so will pay special attention to security protectionAnd prevent that polytetrafluoroethylene (PTFE) from contacting naked light; The corrosion of ability strong oxidizer. Select polytetrafluoroethylene (PTFE)(PTFE) and described flue gas heat-exchange unit 16 in conjunction with the property that not only can not affect described flue gas heat-exchange unit 16Can, can further prevent that described flue gas heat-exchange unit 16 from dewing corrosion occurring.
As preferably, in the middle part of the main body of described flue gas heat-exchange unit 16, be provided with dividing plate, by described heat exchanger masterBody is divided into former exhaust gases passes and cold flue gas passage, can effectively avoid the crossfire of cold and hot fluid, everyRoot heat pipe is all relatively independent closed cells, and cold and hot fluid all flows outside pipe, and close by centreWhat shrouding was tight separates cold and hot fluid. As preferably, described heat pipe is in tilted layout, described heat pipeWith the angle on ground be 25 °-35 °, more preferably the angle on described heat pipe and ground is 30 °, withAvoid sour gas dewing corrosion.
As shown in Figure 2, heat pipe GGH16 of the present invention comprises: former gas approach 1, former flue gasOutlet 2, cold flue gas import 3, cold flue gas outlet 4, flue gas heat-exchange unit main body 5, support frame 6.
Wherein, described support frame is for supporting and fix described flue gas heat-exchange unit 16, described carriageFrame 6 is selected steel frame construction, is provided with crossbeam and column in described steel frame construction, in addition crossbeam and verticalOn post, be also provided with the secondary beam along diagonal, to increase the stability of described steel frame construction.
Wherein, the outlet 4 of described cold flue gas and cold flue gas import 3 arrange with flue gas heat-exchange unit main body 5Top, is positioned at the top of described former gas approach 1 and former exhanst gas outlet 2 so that described former flue gas andDescribed cold flue gas generation convective heat exchange, as Fig. 4 shows in flue gas processing device of the present inventionThe side view of GGH structure, the structure of wherein said cold flue gas outlet 4 and former gas approach 1 is down vertebraBody structure, Fig. 3 is the gas approach of GGH and the knot of outlet in flue gas processing device of the present inventionThe front view of structure.
In addition, described flue gas heat-exchange unit body interior is vertically set side by side with many heat pipes 7,As a detailed description of the invention of the present invention, as described in Figure 5 shown in the profile of heat exchange of heat pipe,In this heat pipe GGH, be set side by side with two heat pipes 7, wherein said heat pipe GGH is without any rotation sectionPart, does not have additional power consumption, even if there are part heat pipe 7 component wear, can change rapidly yet, protectsCard is normal to be produced.
As preferably, in order to reduce the dewing corrosion of described heat pipe 7, in the outer surface spraying of heat pipe 7Organosilicon, increases the anticorrosion reliability of described heat pipe 7, selects spraying organosilicon to replace existing in the present inventionThere is the plating in technology to ward off technology, split to overcome to plate to ward off easily, extremely flimsy in manufacturing process and useShortcoming further improves corrosion resistant performance simultaneously.
In the present invention as described in Figure 5 shown in the profile of heat exchange of heat pipe, at this heat pipe GGHIn be set side by side with two heat pipes 7, wherein said heat pipe GGH is without any rotatable parts, not additionalPower consumption, even if there are part heat pipe 7 component wear, also can change rapidly, ensures normally to produce.
Described heat pipe 7 shells are seamless steel pipe, and the heating section of heat pipe and heat release section are wound with fin (figureIn not shown), fin and shell adopt ratio-frequency welding welding (or other connected modes), welding is jail closelyGu thermal resistance is little.
Wherein said heat pipe 7 is arranged between the top board 8 and base plate of described flue gas heat-exchange unit 16, described inIn flue gas heat-exchange unit main body 5, be also provided with dividing plate, on wherein said top board 8, base plate and described dividing plateBe provided with pore, for described heat pipe 7 is installed, wherein between the heating section and heat release section of heat pipe 7Have hermetically-sealed construction, described hermetically-sealed construction coordinates with pore, forms former flue gas, cold flue gas are carried out effectivelySealing, make their not blowby mutually. As preferably, described hermetically-sealed construction is preferably and is arranged at described heatExpanded graphite between tube and tube hole.
By described setting, can avoid the smoke spillage between former flue gas and clean flue gas completely, Er QiesuoState heat pipe 7 without any rotatable parts, there is no additional power consumption; Also there is heat transfer efficiency high simultaneously,The hot and cold side of heat pipe all can adopt ratio-frequency welding enhanced fin heat transfer as required, has made up general heat exchangeThe shortcoming that coefficient is low. In addition, separate between heat-pipe elements, even if single or several heat pipe damages,Can not cause smoke spillage, not affect overall heat exchange effect yet.
As further preferred, described housing is steel construction piece, and bottom is former exhaust gases passes, topFor cold flue gas passage, for deashing, some soot blower interfaces are arranged in hull outside.
Further, be provided with drainpipe 12 in the bottom of described former exhaust gases passes and cold flue gas passage, useIn timely blowdown.
Further, described top cover 8 one end are connected with described main body by bolt 9, and wherein bolt 9 alsoComprise and be arranged at the sealing gasket of inner side and the nut in outside.
Further, in described flue gas heat-exchange unit, between the top cover 8 of main body and described heat pipe, be provided with spring11, described heat pipe top is also provided with heating rod 10.
The present invention also provides a kind of flue gas processing method based on described flue gas processing device, comprising:
(1) former flue gas carries out heat exchange with cold flue gas after entering flue gas heat-exchange unit, described former flue-gas temperatureReduce;
(2) in step (1), the former flue gas after heat exchange enters in flue gas washing tower, makes described cigarettePart water condensation in gas, simultaneous temperature further reduces, and becomes cold flue gas;
(3) after the cold flue gas in step (2) enters described flue gas heat-exchange unit, carry out heat exchange, temperatureRaise, become unsaturated steam, finally by smoke stack emission.
As preferably, when described device brings into operation, first pass into cold flue gas, and then pass into former cigaretteGas, the temperature of described step (1) Central Plains flue gas after heat exchange is 103 DEG C, described step (2)The temperature of the middle described cold flue gas obtaining after flue gas washing tower is 48 DEG C, cold in described step (3)The exhaust temperature of flue gas after heat exchange is 110 DEG C.
Further, described cold flue gas outlet 4 and cold flue gas import 3 arrange and described former gas approach 1With the top of former exhanst gas outlet 2, so that described former flue gas and described cold flue gas generation convective heat exchange,Wherein said former flue gas is in former gas approach 1 enters described flue gas heat-exchange unit main body 5, at heat pipeLower end heating, working medium absorbs heat and is vaporizated into steam, and simultaneously described former flue-gas temperature reduces, described formerFlue-gas temperature is down to 103 DEG C by 155 DEG C, and the flue gas after cooling enters flue gas washing through former exhanst gas outlet 2In tower 14, in described flue gas washing tower 14, make the part water in flue gas by scrubbing tower circulated sprinklingSegregation junction out, reduces its saturation degree, is down to 48 DEG C through the temperature of scrubbing tower flue gas after treatment, becomesFor cold flue gas.
In described heat pipe, working medium absorbs heat and is vaporizated into after steam under small pressure reduction, rises toHeat pipe upper end; In heat pipe upper end, through washing flue gas washing tower 14 cold flue gas after treatment through cold flue gas import3 enter in described flue gas heat-exchange unit main body 5, and steam generation heat exchange in described heat pipe 7, instituteThe steam of stating in heat pipe upper end is emitted heat to the external world, and is condensed into liquid, and described cold flue gas is through GGHAfter heat exchange, temperature is heated to 110 DEG C by 48 DEG C. Because the low-temperature flue gas after purifying goes out from flue gas washing towerWhile coming, be the saturated vapor of 48 DEG C, become unsaturated vapour after being heated to 110 DEG C by flue gas heat-exchange unit, thenIn the time that discharging with chimney, air outlet contacts cooling with atmosphere at throat place. Along with flue gas is in the atmosphereDiffusion rapidly, cooling, now can not form white water steam at chimney breast, reached and eliminated white cigaretteEffect.
Under effect at described heat pipe inner condensat liquid at gravity, turn back to heating section along heat pipe inner wall, andThe vaporization of being again heated, is transmitted to the other end by heat by one end so circularly. Owing to being phase transformation biographyHeat, therefore, heat pipe internal heating resistance is very little, can obtain the larger coefficient of overall heat transmission with the less temperature difference, and structureSimply, there is the feature of one-way heat conduction, particularly, due to the peculiar mechanism of heat pipe, make between cold fluid and hot fluidHeat exchange all pipe outside carry out, this just can carry out augmentation of heat transfer easily.
Wherein, flue gas processing device of the present invention is put into production, it is in different time in different boilersFlue gas treatment effect is as shown in table 2.
Table 2 boiler smoke discharge index:
Can find out from above table, select flue gas processing device of the present invention to carry out after flue gas processing,Flue gas can reach discharge standard, has eliminated white water steam phenomenon simultaneously:
1) DUST decline 0.41mg/Nm in flue gas3, add up to and reduce discharging 0.22 ton/year;
2) in flue gas, HCl obviously declines, about 1.38mg/Nm3, add up to and reduce discharging 0.75 ton/year;
3) lime white unit consumption (with mechanical load metering) the about 17.85kg/T/h that declines, saves hydroxideCalcium 1.43kg/h, annual saving adds up to 3.718 tons (whole year operation 2600h), and all the other indexs do not have shadowRing, eliminated white water steam phenomenon, effect is fairly obvious.
In addition, of the present invention one, particularly in embodiment, every stove of described de-white sewage produces7.5T/H, produces sewage 180T average every day, the raw 540T waste water of three bar oven common properties every day. According to factoryFamily provides data, processes 1.437 yuan of the operating costs of water per ton, amount to expense and be 32.3325 yuan/littleTime, full year cost is 84064.5 yuan (whole year operations 2600 hours), therefore, and described flue gas processingThe cost of device is relatively low.
Flue gas processing device of the present invention is applied in different boilers (1# stove, 2# stove, 3# stove),Under different environment, its de-white effect is all very good, its clearance all more than 90%, asShown in table 3--table 5.
Table 3 flue gas processing device takes off white data
Table 4 flue gas processing device takes off white data
Table 5 flue gas processing device takes off white data
Can find out by above table, select flue gas processing device of the present invention, its flue gas is de-whiteEfficiency all more than 90%, and be greater than 5 DEG C, its better effects if, best shape when this temperature of environmentState can be removed white water steam completely, does not affect other processing of flue gas simultaneously, has good effect.
The present invention is illustrated by above-described embodiment, but should be understood that, above-mentioned enforcementExample is the object for giving an example and illustrating just, but not is intended to the present invention to be limited to described embodimentIn scope. In addition it will be appreciated by persons skilled in the art that the present invention is not limited to above-mentioned enforcementExample, can also make more kinds of variants and modifications according to instruction of the present invention, these variants and modificationsAll drop in the present invention's scope required for protection. Protection scope of the present invention is wanted by attached rightAsk book and equivalent scope thereof to define.

Claims (9)

1. a flue gas processing device, comprising: the flue gas washing tower being communicated with chimney, it is characterized in that,Described device also comprises the flue gas heat-exchange unit being arranged between described flue gas washing tower and described chimney, instituteThe former gas approach of stating flue gas heat-exchange unit is connected with former flue, the former flue gas of described flue gas heat-exchange unitOutlet be connected with the bottom of described flue gas washing tower, the cold flue gas import of described flue gas heat-exchange unit and described inThe top of flue gas washing tower is connected;
Described flue gas heat-exchange unit is selected hot-tube flue gas exchanger, wherein, and in described flue gas heat-exchange unit main bodyPortion is vertically set side by side with many heat pipes, and described heat pipe is in tilted layout, described heat pipe and groundAngle be 25 °-35 °;
Described heat pipe body middle part is provided with dividing plate, and it is logical that described heat pipe body is divided into former flue gas by described dividing plateRoad and cold flue gas passage, described heat pipe is coated with organosilicon on surface;
Wherein, on the housing of described flue gas heat-exchange unit, be also provided with some soot blower interfaces.
2. device according to claim 1, is characterized in that, the main body of described flue gas heat-exchange unitSurfaces externally and internally is provided with polytetrafluoroethylmaterial material layer.
3. device according to claim 1, is characterized in that, at described former exhaust gases passes and coldThe bottom of exhaust gases passes is provided with drainpipe, for blowdown.
4. device according to claim 1, is characterized in that, main body in described flue gas heat-exchange unitTop cover and base plate on be provided with hole, between described hole and described heat pipe, be provided with encapsulant.
5. device according to claim 1, is characterized in that, described flue gas heat-exchange unit main bodyBetween top cover and described heat pipe, be provided with spring.
6. device according to claim 1, is characterized in that, described heat pipe top is also provided withHeating rod.
7. device according to claim 1, is characterized in that, described device also comprises that flue gas changesHot device support frame, for supporting described flue gas heat-exchange unit.
8. the flue gas processing method based on arbitrary described flue gas processing device in claim 1-7,Comprise the following steps:
(1) former flue gas carries out heat exchange with cold flue gas after entering flue gas heat-exchange unit, described former flue-gas temperatureBe down to 103 DEG C;
(2) in step (1), the former flue gas after heat exchange enters in flue gas washing tower, makes described cigarettePart water condensation in gas, reduces its saturation degree simultaneous temperature and is further down to 48 DEG C, becomes cold flue gas;
(3) after the cold flue gas in step (2) enters described flue gas heat-exchange unit, carry out heat exchange, temperatureBe increased to 110 DEG C, become unsaturated steam, finally by smoke stack emission.
9. method according to claim 8, is characterized in that, when described device brings into operation,First pass into cold flue gas, and then pass into former flue gas.
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CN105056735A (en) * 2015-08-03 2015-11-18 南通京通石墨设备有限公司 Flue gas treatment apparatus and flue gas treatment method
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