CN104815528B - A kind of wet flue gas are from rise again type integrated fume purifier and its application - Google Patents
A kind of wet flue gas are from rise again type integrated fume purifier and its application Download PDFInfo
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- CN104815528B CN104815528B CN201510175216.6A CN201510175216A CN104815528B CN 104815528 B CN104815528 B CN 104815528B CN 201510175216 A CN201510175216 A CN 201510175216A CN 104815528 B CN104815528 B CN 104815528B
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Abstract
The present invention relates to a kind of wet flue gas are from rise again type integrated fume purifier and its application, device includes scrubbing tower outer tube, the exhanst gas outlet being arranged at the top of scrubbing tower outer tube and the absorbing liquid liquid storage cylinder of lower section, it is connected to scrubbing tower outer tube sidepiece and extends to the inlet air stack exntension tubs in scrubbing tower outer tube, the front end of the inlet air stack exntension tubs is provided with gas approach, following current shower nozzle in the same direction and reverse shower nozzle is provided with inlet air stack exntension tubs, the drop of following current shower nozzle injection is in the same direction with flow of flue gas in the same direction, formed with reverse shower nozzle and liquidated up and down, foam-inducing ring is provided between following current shower nozzle and reverse shower nozzle in the same direction.The present invention integrates the multi-functionals such as dedusting, desulfurization, demisting and flue gas heat exchange, device structure is compacter, floor space is little, can substantially eliminate " emitting white cigarette " or the chimney rain problem of wet purification flue gas, deducts environment or the impact of visual aspects of the smoke evacuation to periphery.
Description
Technical field
The present invention relates to the Air Pollution Control equipment of field of environment protection and technology, more particularly, to a kind of wet flue gas certainly
Type of rising again integrated fume purifier and its application.
Background technology
The pollution problem of current China's gray haze is severe so that ordinarily resident to the smoke condition of industrial undertaking's smoke stack emission more
Concern.The problems such as chimney " white cigarette " and chimney rain, has become one of main object that many industrial and mineral plant areas nearby residents are complained.
In fact, this kind of flue gas is through environmental practice process mostly, major pollutants therein have reached discharge standard, but
As dedusting, cooling, desulfurization and other purification process employ wet processing technique, cause exhaust gas temperature too low (generally 45
～55 DEG C), and water vapour is in saturation or hypersaturated state, causes the rapid condensation near the chimney breast of moisture content in flue gas
For droplet, the white shape of flue gas is made, or even forms big drop, fallen near chimney, form " chimney rain " phenomenon.
" the emitting white cigarette " of chimney or " chimney rain " problem may bring four environmental problems：(1) temperature of wet flue gas compares
Low, rising height is less, and ground pollution concentration can be caused of a relatively high；(2) plume can be made white because of the condensation of water vapour,
Affect the vision of people；(3) condensate is likely to result in the precipitation of wind direction under chimney, affects the weather in some areas；(4) flue gas warp
Although cross SO after wet desulphurization2Content greatly reduce, but to SO in flue gas3Total content can only remove 40～50%, due to
Flue gas acid dew point temperature range by desulfurization before 105～111.6 DEG C be down to 70.5～90 DEG C after desulfurization, and through FGD systems
Neat stress temperature is 50 DEG C or so, inner wall of stack temperature well below acid dew-point temperature, remaining SO in such neat stress3Easily
Condensation is dissolved in the condensation water being attached on chimney internal cylinder wall, makes condensation water that there are very strong corrosivity.
In order to eliminate " emitting white cigarette " or " chimney rain " problem of chimney, foreign countries are generally using the side heated up again by flue gas
Method.However, due to using electrical heating or the extra reheating mode high cost for supplementing fuel, hence with flue gas before washing
Heat to process after wet flue gas carry out post bake to heat up be that (i.e., cold and hot flue gas heat is exchanged a kind of economic method
Method).Heat exchange between general cold and hot flue gas needs swinging gas-to-gas heat exchanger (GGH) or the indirect type heat exchanger (with water to be
Medium), this two classes heat exchanger is typically arranged separately in be imported and exported between the flue being connected with scrubbing tower, and floor space is big, resistance
Also larger, toward contact can cause blocking the problems such as.In addition, Chinese patent 2008100284686, patent 021598673 and specially
Multiple patents such as profit 201310146315.2 disclose several device and methods for eliminating white cigarette, and its main thought is using cooling
The flue gas of high humidity is first carried out cool-down dehumidification by the means such as device and drying.Such method is also only limitted to hot and humid flue gas, and
Great majority flue gas through wet desulphurization after is not applied to.
Content of the invention
The purpose of the present invention is exactly to provide one kind and can collect dedusting, take off to overcome the defect of above-mentioned prior art presence
The multi-functionals such as sulfur, demisting and flue gas heat exchange are integrated, and the compacter wet flue gas of device structure are from type integration cigarette of rising again
Air purifying apparatus and its application.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of wet flue gas are arranged on scrubbing tower outer tube from type integrated fume purifier of rising again including scrubbing tower outer tube
The exhanst gas outlet at top, the absorbing liquid liquid storage cylinder being arranged on below scrubbing tower outer tube are connected to scrubbing tower outer tube sidepiece and extend
Inlet air stack exntension tubs Dao scrubbing tower outer tube in, the front end of the inlet air stack exntension tubs are provided with gas approach, gas approach, enter
Gas flue exntension tubs and scrubbing tower outer tube can be carried out transformation and be formed using original flue and washing tower device.
Following current shower nozzle in the same direction and reverse shower nozzle, described following current shower nozzle spray in the same direction is provided with described inlet air stack exntension tubs
The drop that penetrates in the same direction, is formed with reverse shower nozzle and is liquidated up and down with flow of flue gas, and the amount of liquid of following current shower nozzle injection in the same direction is reverse
The 50-100v/v% of shower nozzle, following current shower nozzle in the same direction and reverse shower nozzle distance in 0.8-2.5 rice, following current shower nozzle in the same direction with reverse
Foam-inducing ring is provided between shower nozzle.
Described foam-inducing ring is apart from reverse shower nozzle 0.5-1.5 rice；For narrow tapered and flaring between upper and lower ends alleviating distention in middle-JIAO
The throat tubular construction in aperture, vertical extension are 0.3-0.5 rice, and trunnion vertical extension is 0.1-0.3 rice, and the tapered of foam-inducing ring incline
The angle formed between the inwall of inclined-plane and inlet air stack exntension tubs is not more than 20 °, and the sectional area of middle trunnion accounts for foam-inducing
The 70-95% of ring sectional area.
Described foam-inducing ring is made up of high-abrasive material, including but not limited to pottery or rustless steel.
The up flue gas two of 1-2 layers is provided with the middle part of the annular space constituted with scrubbing tower outer tube shell on the outside of inlet air stack exntension tubs
Secondary purification column plate, it can be eddy flow baffle or sieve tray that the up smoke secondary purifies column plate.
1-2 layer demistings are provided with the middle part of the annular space constituted with scrubbing tower outer tube shell on the outside of described inlet air stack exntension tubs
Plate, positioned at the top that up smoke secondary purifies column plate.
Flue gas heat exchange unit is provided with described scrubbing tower outer tube, air inlet is arranged in by some groups of heat pipes by certain inclination angle
The top barrel of flue exntension tubs, heat pipe bottom are arranged on air inlet cigarette installed in the inner side of inlet air stack exntension tubs, heat pipe top
In the annular space constituted with scrubbing tower outer tube shell on the outside of road exntension tubs.
Preferably, heat pipe is arranged in 15～60 ° of angles with scrubbing tower outer tube inner wall, is made using resistant material and is obtained.
Wet flue gas adopt following steps from type integrated fume purifier of rising again in application：
The first step, flue gas by gas approach, enter the inlet air stack exntension tubs concentric with scrubbing tower outer tube, flue gas first
Flow into from top to bottom；
Second step, the middle part of inlet air stack exntension tubs are first contacted with the high speed drop of following current shower nozzle in the same direction injection, to flue gas
Carry out initial absorption and micro- supercharging reduces drag losses；
3rd step, is met at foam-inducing ring with the drop of reverse shower nozzle injection, produces and significantly liquidate effect, and
Water conservancy diversion and reinforcing gas-to-liquid contact is carried out in the presence of foam-inducing ring, so as to be conducive to flue gas ash removal, cooling and gaseous contamination
The absorption of thing；Absorbing liquid is fallen after rise to absorbing liquid liquid storage cylinder；
4th step, flue gas are flowed out from the bottom of inlet air stack exntension tubs, and steering is up, are entered on the outside of inlet air stack exntension tubs
With the annular space of scrubbing tower outer tube shell composition, then the up smoke secondary through being arranged in annular space purify column plate flue gas is made into
One step purified treatment, makes various pollutant reach discharge index requirement；
5th step, flue gas after the demisting plate demisting of top, rise to flue gas heat exchange unit again, the heat carrier in heat pipe
After the heat pipe bottom heat absorption vaporization installed in heat smoke side, the heat pipe top installed in wet flue gas area is risen to, to wet cigarette
Gas is heated, and the thermophore after being condensed is back to heat pipe bottom again in fluid form, so repeatedly, gradually by hot cigarette
Heat in gas is conveyed to wet flue gas, flue gas is realized in absorption equipment from function of rising again；
6th step, the flue gas after being heated up again are finally flowed out from exhanst gas outlet, are discharged by chimney, can achieve dress
The integrated fume purification function that puts and " the emitting white cigarette " or the chimney rain problem that eliminate wet purification flue gas.
Compared with prior art, the present invention has advantages below：
1st, the system integrates the multi-functionals such as dedusting, desulfurization, demisting and flue gas heat exchange, using wet scrubbing work
Skill can effectively remove dust and sulfur dioxide in flue gas, realize the purpose of dedusting and desulfurization, and device structure is compacter, take up an area
Area is little, greatlys save construction space and steel consumption；
2nd, the type heat pipe heat exchanging technology of rising again certainly of the system, it is possible to use the heat exchange of inlet flue gas and exiting flue gas,
After solving the problems, such as to process, the intensification of flue gas, while flue gas is after multistage demisting plate and heat exchanger tube, can effectively reach demisting mesh
, " emitting white cigarette " or the chimney rain problem of wet purification flue gas can be substantially eliminated, environment or vision side of the smoke evacuation to periphery is deducted
The impact in face；
3rd, using efficient heat pipe heat exchanging technology, reasonably wet flue gas are carried out using the heat of before processing heat smoke plus
Heat, device have preferable design concept and promotion prospect, can play a role in China's control Brownish haze pollution engineering.
4th, device will induce enhanced dynamic wave scrubbing to combine with efficient gas-to-liquid contact washing methods such as swirl injections, and
Being aided with heat pipe carries out high efficient heat exchanging, acts on high-efficiency desulfurization, dedusting, demisting and flue gas reheat, can effectively reduce pollutant
Discharge, and reach the effect of elimination " white cigarette ".
Description of the drawings
Fig. 1 is the structural representation of the present invention.
In figure, 1- gas approach, 2- inlet air stack exntension tubs, 3- scrubbing tower outer tube, 4- following current shower nozzles in the same direction, 5- inversely spray
The up smoke secondary of head, 6- foam-inducing rings, 7- purify column plate, 8- demisting plates, 9- absorbing liquid liquid storage cylinders, 10- heat exchange units,
11- heat pipes bottom, 12- heat pipes top, 13- exhanst gas outlets.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings, and present embodiment is with the technology of the present invention
Implemented under the premise of scheme, to those skilled in the art, under this patent design and specific embodiment enlightenment, can
Some deformations that directly derives from this patent disclosure and general knowledge or associate, it will be recognized by those of ordinary skill in the art that
Can adopt the replacement that known technology is commonly used in additive method, or prior art, and equivalence changes or the modification of feature, between feature
Mutually different combination, the change of such as size, the unsubstantiality of the conversion of material etc. are changed, can be equally employed, all
This patent representation function and effect can be realized, no longer citing expansion is described in detail one by one, belongs to this patent protection domain.
Embodiment 1
A kind of wet flue gas from rising again type integrated fume purifier, its structure as shown in figure 1, including scrubbing tower outer tube 3,
The exhanst gas outlet 13 being arranged at the top of scrubbing tower outer tube 3, the absorbing liquid liquid storage cylinder 9 being arranged on below scrubbing tower outer tube, is connected to
3 sidepiece of scrubbing tower outer tube simultaneously extends to the inlet air stack exntension tubs 2 in scrubbing tower outer tube 3, the front end of the inlet air stack exntension tubs 2
Gas approach 1 is provided with, gas approach 1, inlet air stack exntension tubs 2 and scrubbing tower outer tube 3 can utilize original flue and scrubbing tower
Device carries out transformation and forms.
Following current shower nozzle 4 in the same direction and reverse shower nozzle 5 are provided with inlet air stack exntension tubs 2, wherein following current shower nozzle 4 sprays in the same direction
Drop and flow of flue gas in the same direction, formed with reverse shower nozzle 5 and liquidated up and down, the amount of liquid of the injection of following current shower nozzle 4 in the same direction is reverse
The 50-100v/v% of shower nozzle, following current shower nozzle 4 in the same direction and 5 distance of reverse shower nozzle in 0.8-2.5 rice, following current shower nozzle 4 in the same direction with inverse
To being provided with foam-inducing ring 6 between shower nozzle 5.
Foam-inducing ring 6 is made up of high-abrasive material, for example, can be made using pottery or rustless steel and be obtained, reverse shower nozzle
0.5-1.5 rice, its structure are the throat tubular construction in narrow tapered and flaring aperture between upper and lower ends alleviating distention in middle-JIAO, and vertical extension is 0.3-
0.5 meter, angle of the trunnion vertical extension for formation between the inwall of 0.1-0.3 rice, tapered inclined plane and inlet air stack exntension tubs 2
No more than 20 °, the sectional area of middle trunnion accounts for the 70-95% of 6 sectional area of foam-inducing ring.It is about 90% in the present embodiment.
In addition, being provided with 1-2 layers in the middle part of the annular space constituted with 3 shell of scrubbing tower outer tube on the outside of inlet air stack exntension tubs 2
Up smoke secondary purifies column plate 7, and it can be eddy flow baffle or sieve tray that the up smoke secondary purifies column plate 7.Air inlet cigarette
1-2 layer demistings plate 8 is provided with the middle part of the annular space constituted with 3 shell of scrubbing tower outer tube on the outside of road exntension tubs 2, positioned at up flue gas two
The secondary top for purifying column plate 7.Flue gas heat exchange unit 10 is provided with scrubbing tower outer tube 3, air inlet cigarette is arranged in by some groups of heat pipes
The top barrel of road exntension tubs 2, is arranged in 15～60 ° of angles with 3 inwall of scrubbing tower outer tube, and the angle angle in the present embodiment is
60°.Installed in the inner side of inlet air stack exntension tubs 2, heat pipe top 12 is on the outside of inlet air stack exntension tubs 2 for heat pipe bottom 11
In the annular space of 3 shell of scrubbing tower outer tube composition.
Wet flue gas from rise again type integrated fume purifier application when using following steps：
The first step, flue gas by gas approach 1, enter the inlet air stack exntension tubs 2 concentric with scrubbing tower outer tube 3 first,
Flue gas is flowed into from top to bottom；
Second step, the middle part of inlet air stack exntension tubs 2 are first contacted with the high speed drop of following current shower nozzle 4 in the same direction injection, to cigarette
Gas carries out initial absorption and micro- supercharging reduces drag losses；
3rd step, is met at foam-inducing ring 6 with the drop of the injection of reverse shower nozzle 5, produces the effect that significantly liquidates, and
Water conservancy diversion and reinforcing gas-to-liquid contact is carried out in the presence of foam-inducing ring, so as to be conducive to flue gas ash removal, cooling and gaseous state dirty
The absorption of dye thing, absorbing liquid are fallen after rise to absorbing liquid liquid storage cylinder 9；
4th step, flue gas are flowed out from the bottom of inlet air stack exntension tubs 2, and steering is up, are entered outside inlet air stack exntension tubs 2
The annular space that side is constituted with 3 shell of scrubbing tower outer tube, then through the up smoke secondary purification column plate 7 being arranged in annular space to flue gas
Make further purified treatment, make various pollutant reach discharge index requirement；
5th step, flue gas after 8 demisting of demisting plate of top, rise to flue gas heat exchange unit 10 again, the heat in heat pipe
Carrier rises to the heat pipe top installed in wet flue gas area after the heat absorption vaporization of heat pipe bottom 11 installed in heat smoke side
12, wet flue gas are heated, the thermophore after being condensed is back to heat pipe bottom 11 again in fluid form, processes repeatedly
The heat in heat smoke is conveyed to wet flue gas gradually, flue gas is realized in absorption equipment from function of rising again；
6th step, the flue gas after being heated up again are finally flowed out from exhanst gas outlet 13, are carried out discharge by chimney and be can achieve
The integrated fume purification function of device and " emitting white cigarette " or the chimney rain problem of elimination wet purification flue gas..
Embodiment 2
The present invention is with actual coal-fired flue-gas as object of study research experiment.Draw from coal-burning boiler flue
1000m3The actual coal-fired flue-gas of/h, supporting establish a set of wet flue gas from rising again type integrated fume purifier.Entrance cigarette
Temperature degree is 150 DEG C, SO2Concentration is 1200mg/m3, dust concentration is 5g/m3.The pilot system adopts Gypsum Wet
Sulfur removal technology, carries out desulfurization process to flue gas, and liquid-gas ratio is 10L/m3, empty tower gas velocity 3m/s, calcium sulfur ratio 1.1, during gas-to-liquid contact
Between be 10s.Through the operation of 100 hours, SO2Exit concentration is controlled in 100mg/m3Within, outlet dust concentration control exists
0.4g/m3Hereinafter, exit gas temperature is more than 80 DEG C.
Claims (7)
1. a kind of wet flue gas are arranged on scrubbing tower outer tube from type integrated fume purifier of rising again including scrubbing tower outer tube (3)
(3) exhanst gas outlet (13) at the top of, the absorbing liquid liquid storage cylinder (9) being arranged on below scrubbing tower outer tube, is connected to scrubbing tower outer tube
(3) sidepiece the inlet air stack exntension tubs (2) in scrubbing tower outer tube (3) are extended to, the front end of the inlet air stack exntension tubs (2) sets
There is gas approach (1), it is characterised in that
Following current shower nozzle (4) in the same direction and reverse shower nozzle (5), described following current in the same direction are provided with described inlet air stack exntension tubs (2)
The drop that shower nozzle (4) sprays in the same direction, is formed with reverse shower nozzle (5) and is liquidated up and down with flow of flue gas, described following current shower nozzle in the same direction
(4) foam-inducing ring (6) is provided between reverse shower nozzle (5)；
Flue gas heat exchange unit (10) is provided with described scrubbing tower outer tube (3), is arranged in by certain inclination angle by some groups of heat pipes
The top barrel of inlet air stack exntension tubs (2), heat pipe bottom (11) are arranged on the inner side of inlet air stack exntension tubs (2), on heat pipe
In the annular space that portion (12) is constituted with scrubbing tower outer tube (3) shell on the outside of inlet air stack exntension tubs (2)；
Throat tubular construction of the described foam-inducing ring (6) for narrow tapered and flaring aperture between upper and lower ends alleviating distention in middle-JIAO, foam-inducing
The angle formed between the inwall of the tapered inclined plane of ring (6) and inlet air stack exntension tubs (2) is not more than 20 °, middle trunnion
Sectional area accounts for the 70-95% of foam-inducing ring (6) sectional area.
2. a kind of wet flue gas according to claim 1 are from type integrated fume purifier of rising again, it is characterised in that described
Foam-inducing ring (6) be made up of high-abrasive material, including but not limited to pottery or rustless steel.
3. a kind of wet flue gas according to claim 1 are from type integrated fume purifier of rising again, it is characterised in that described
Following current shower nozzle (4) in the same direction amount of liquid for spraying for reverse shower nozzle (5) 50-100v/v%.
4. a kind of wet flue gas according to claim 1 are from type integrated fume purifier of rising again, it is characterised in that described
Inlet air stack exntension tubs (2) on the outside of with scrubbing tower outer tube (3) shell composition annular space in the middle part of in be provided with the up flue gas two of 1-2 layers
Secondary purification column plate (7), the up smoke secondary purifies column plate (7) includes eddy flow baffle or sieve tray.
5. a kind of wet flue gas according to claim 4 are from type integrated fume purifier of rising again, it is characterised in that described
Inlet air stack exntension tubs (2) on the outside of with scrubbing tower outer tube (3) shell composition annular space in the middle part of in be provided with 1-2 layers demisting plate (8),
It is located at the top that up smoke secondary purifies column plate (7).
6. a kind of wet flue gas according to claim 1 are from type integrated fume purifier of rising again, it is characterised in that described
Heat pipe and scrubbing tower outer tube (3) inwall arrange in 15～60 ° of angles.
7. application of a kind of wet flue gas from type integrated fume purifier of rising again, it is characterised in that adopt following steps：
The first step, flue gas by gas approach (1), enter the inlet air stack exntension tubs concentric with scrubbing tower outer tube (3) first
(2), flue gas is flowed into from top to bottom；
Second step, the high speed drop that the middle part of inlet air stack exntension tubs (2) is first sprayed with following current shower nozzle (4) in the same direction are contacted, to cigarette
Gas carries out initial absorption and micro- supercharging reduces drag losses；
3rd step, the drop sprayed with reverse shower nozzle (5) are met at foam-inducing ring (6) place, produce the effect that significantly liquidates, and inhale
Receive liquid to fall after rise to absorbing liquid liquid storage cylinder (9)；
4th step, flue gas are flowed out from the bottom of inlet air stack exntension tubs (2), and steering is up, enter inlet air stack exntension tubs (2) outward
The annular space that side is constituted with scrubbing tower outer tube (3) shell, then up smoke secondary purification column plate (7) through being arranged in annular space is right
Flue gas makees further purified treatment；
5th step, flue gas after demisting plate (8) demisting of top, rise to flue gas heat exchange unit (10), the heat in heat pipe again
Carrier rises to the heat pipe top installed in wet flue gas area after heat pipe bottom (11) the heat absorption vaporization installed in heat smoke side
(12), wet flue gas are heated, the thermophore after being condensed is back to heat pipe bottom (11) again in fluid form, repeatedly
Process and the heat in heat smoke is conveyed to wet flue gas gradually, flue gas is realized in absorption equipment from function of rising again；
6th step, the flue gas after being heated up again are finally flowed out from exhanst gas outlet (13), are discharged by chimney.
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| CN108355465A (en) * | 2018-03-01 | 2018-08-03 | 佛山赛因迪环保科技有限公司 | Desulfurization fume defogging method and device |
| CN109289446A (en) * | 2018-11-06 | 2019-02-01 | 彭圆 | A kind of petroleum refining desulphurization system |
| CN110075653A (en) * | 2019-05-13 | 2019-08-02 | 安徽工业大学 | A kind of dedusting of flue gas end takes off whitening method |
| CN110567290B (en) * | 2019-10-15 | 2024-04-02 | 杭州蕴泽环境科技有限公司 | Unsaturated high-humidity tail gas white smoke eliminating device and method |
| CN114682049B (en) * | 2020-12-30 | 2023-07-04 | 中国石油化工股份有限公司 | Flue gas phase change SO 3 Dust treatment device and method |
| CN114682050B (en) * | 2020-12-30 | 2023-05-05 | 中国石油化工股份有限公司 | Flue gas treatment device and method |
| CN113552296B (en) * | 2021-09-17 | 2021-12-03 | 海安嘉臣环境科技有限公司 | High-altitude smoke emission continuous online monitoring system |
| CN114797467A (en) * | 2022-04-25 | 2022-07-29 | 南通中船机械制造有限公司 | Desulfurizing tower for ship tail gas and desulfurizing process thereof |
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| US4380491A (en) * | 1981-08-26 | 1983-04-19 | Combustion Engineering, Inc. | Spray nozzle assembly for spray dryer |
| CN101007238A (en) * | 2006-12-20 | 2007-08-01 | 山东大学 | Radial grading desulfurization dust-removing device |
| CN201289322Y (en) * | 2008-10-22 | 2009-08-12 | 广州大学 | Air conditioner watch cooling device with improved dehumidification and energy-saving effect |
| CN201807285U (en) * | 2010-09-28 | 2011-04-27 | 罗忠凯 | Wet-type combination smoke dust removal desulphurization device |
| CN202410505U (en) * | 2012-01-20 | 2012-09-05 | 北京中冶设备研究设计总院有限公司 | Desulfurization, denitration and demercuration integral device |
| CN202823102U (en) * | 2012-08-07 | 2013-03-27 | 安徽三星化工有限责任公司 | Urea offgas ammonia recovery device |
| CN103398428A (en) * | 2013-08-19 | 2013-11-20 | 苏州惠林节能材料有限公司 | Heat-pipe self-temperature-return dehumidification cooling fresh air unit |
| CN203443000U (en) * | 2013-08-19 | 2014-02-19 | 苏州惠林节能材料有限公司 | Preheating type heat supply fresh air handling unit with automatic backheating and temperature rise |
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