CN203963979U - Energy-saving environmental-protection boiler exhaust emissions tower - Google Patents
Energy-saving environmental-protection boiler exhaust emissions tower Download PDFInfo
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- CN203963979U CN203963979U CN201420371832.XU CN201420371832U CN203963979U CN 203963979 U CN203963979 U CN 203963979U CN 201420371832 U CN201420371832 U CN 201420371832U CN 203963979 U CN203963979 U CN 203963979U
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Abstract
The utility model discloses a kind of energy-saving environmental-protection boiler exhaust emissions tower, comprise discharge tower body, wherein: the middle part, bottom of discharge tower body is provided with tail gas and flows into flue and exhaust gas heat retracting device; One end that tail gas flows into flue is communicated with boiler room exhaust emission pipeline, and tail gas flows into the other end of flue and the Surface Contact of exhaust gas heat retracting device; The bottom surrounding of discharge tower body is provided with outdoor cold wind import; The cold air entering from outdoor cold wind import leads to the boiler exhaust gas after exhaust gas heat retracting device is processed the middle part head-on collision chamber that discharges tower body jointly; The top of discharge tower body distributes and is provided with two exhaust uptakes that integral body is S-shaped from middle part to both sides, and both sides, top are provided with mixed tail gas outlet; The arrival end of the exhaust uptake of S shape is communicated with middle part head-on collision chamber, and the port of export of the exhaust uptake of S shape is communicated with mixed tail gas outlet; On the walling of flue of the exhaust uptake of S shape, be all equipped with for adsorbing the absorption baffle plate of solid particulate matter.
Description
Technical field
The utility model relates to thermal hardware and manufactures field, relates in particular to a kind of energy-saving environmental-protection boiler exhaust emissions tower.
Background technology
In daily production, the range of application of gas fired-boiler is comparatively extensive, is applicable to the fields such as heating in industrial stoving application, large-scale commercial building or civil buildings.
The general temperature of gas fired-boiler tail gas can reach 150 ℃ of left and right, has the used heat that can recycle.At present, the waste heat recovery for boiler exhaust gas both at home and abroad has research, and existing portioned product.Two kinds of waste heat of boiler tail gas device architecture contrast schematic diagrames in prior art as schematically shown in Figure 1, A does not generally install exhaust waste heat recovery device schematic diagram; B installs the discharge schematic diagram that using waste heat from tail gas reclaims, and after installation tail gas heat exchanger, boiler exhaust gas exhaust temperature reduces, and the heat of recovery can be for heating, health hot water preparation, water inlet waste heat or other purposes; The kind of tail gas heat exchanger has the various ways such as shell and tube exchanger, phase-change heat-exchanger, water spray heat exchanger.But existing tail gas heat exchanger product is all mounted in boiler room, generally approach boiler exhaust gas outlet, focus on how reducing the exhaust temperature of boiler exhaust gas, as far as possible recovery waste heat.
But above-mentioned Fig. 1, but there is following objective technique defect in the system architecture that in prior art, B illustrates: existing tail gas heat exchanger product mainly exists the problem of several aspects: (1) function singleness: the exhaust temperature of focusing on how reducing boiler exhaust gas, the recovery of concern to heat, and ignored the impact of pollutant on environment in boiler exhaust gas smoke stack emission mouth place tail gas, after use existing apparatus, can only realize the simple function that used heat utilizes.(the boiler exhaust gas of discharge can produce a large amount of white smoke and affected cell environment, and in tail gas, the discharge of solid particulate matter has increased the weight of serious haze weather of North City undoubtedly simultaneously).Boiler exhaust gas is also a kind of pollution sources that can cause environmental disruption, in the high-temperature flue gas of tail gas outlet, contain solid particle and pernicious gas (PM2.5 (particulate matter, particle), nitrogen oxide (NOX), oxysulfide (SOX), CO, CO2 etc.), general gas fired-boiler tail gas also contains water vapour (H2O).What wherein, cause atmosphere pollution is mainly nitric oxide (NO) and nitrogen dioxide (NO2) and sulfur dioxide (SO2) etc.
(2) the system architecture installation difficulty that B illustrates is larger: boiler exhaust gas recuperation of heat is the power-saving technology that in recent years just obtains attention, the domestic existing rarer installation exhaust gas heat of a large amount of active boilers retracting device, the Waste Heat Recovery utilization that utilizes existing device and technology to implement boiler exhaust gas generally inevitably will relate to the secondary transformation of boiler room tail gas discharge system and other heating systems, difficulty of construction is large, and improvement cost is high; Even to newly-built boiler exhaust gas exhaust system, while installing for the first time, just use tail gas heat-exchanger rig, because above-mentioned boiler exhaust gas heat reclamation device is only confined to be arranged in boiler room, and installation site equipment is many, pipeline is many, so installation difficulty is all larger.
Therefore, how overcoming the above-mentioned technical problem relating in prior art, is technical problem urgently to be resolved hurrily to those skilled in the art.
Utility model content
The purpose of this utility model is to provide a kind of energy-saving environmental-protection boiler exhaust emissions tower, to address the above problem.
In order to achieve the above object, the technical solution of the utility model is achieved in that
The utility model provides a kind of energy-saving environmental-protection boiler exhaust emissions tower, comprises discharge tower body, wherein:
The middle part, bottom of described discharge tower body is provided with tail gas and flows into flue and exhaust gas heat retracting device; One end that described tail gas flows into flue is communicated with boiler room exhaust emission pipeline, and described tail gas flows into the other end of flue and the Surface Contact of described exhaust gas heat retracting device; The bottom surrounding of described discharge tower body is provided with outdoor cold wind import; The cold air entering from described outdoor cold wind import and the boiler exhaust gas after exhaust gas heat retracting device is processed lead to the middle part head-on collision chamber of described discharge tower body jointly;
The top of described discharge tower body distributes and is provided with two exhaust uptakes that integral body is S-shaped from middle part to both sides, and both sides, top are provided with mixed tail gas outlet; The arrival end of the exhaust uptake of described S shape is communicated with middle part head-on collision chamber, and the port of export of the exhaust uptake of described S shape is communicated with mixed tail gas outlet;
On the walling of flue of the exhaust uptake of described S shape, be all equipped with for adsorbing the absorption baffle plate of solid particulate matter.
Preferably, described absorption baffle plate comprises metal screen or filter paper, active carbon filter plate, electrostatic dust-collecting device; Described absorption baffle plate and described discharge tower body removably connect.
Preferably, described mixed tail gas exit is also provided with the absorption blinds of eliminating the noise, and described noise elimination absorption blinds and described discharge tower body removably connect.
Preferably, described tail gas flows into flue outer wall and is provided with flue layer.
Preferably, described discharge tower body comprises cuboid tower body and herringbone tower lid; Described cuboid tower body and herringbone tower lid are color steel and build.
Preferably, the bottom of described discharge tower body is also provided with grounding-for-lightning device.
Preferably, the front of described discharge tower body is also provided with repair and maintenance door.
Compared with prior art, the advantage of the utility model embodiment is:
A kind of energy-saving environmental-protection boiler exhaust emissions tower that the utility model provides, analyze above-mentioned energy-saving environmental-protection boiler exhaust emissions tower structure known:
The tail gas water smoke separation principle that condenses: because the tail gas of discharge tower body bottom flows into the tail gas inlet port of flue and the outlet of the mixed tail gas at top exists the vertical discrepancy in elevation, and there is the temperature difference in discharge tower body interior flue gas and extraneous air, therefore between outdoor cold wind import and mixed tail gas outlet, there is hot pressing, can form free convection power, do not need machine power can trend outdoor air to enter discharge tower body and mix with flue gas after from mixed tail gas exit point, discharge; High-temperature boiler tail gas is after the preliminary cooling of overheated switching heat-exchanger, enter in middle part head-on collision chamber, the tail gas also having surplus heat after now cold air and heat exchange processed clashes and mixes, impact due to two kinds of gas temperature differential, and liquefaction produces a large amount of steam rapidly, steam will carry out atomization sedimentation to a large amount of solid particles and dusty gas, thereby to the tail gas purified treatment that clashes for the first time;
Through the mist in head-on collision chamber, again constantly mix in the exhaust uptake of S shape with outdoor low temperature cold air subsequently, tail gas is constantly lowered the temperature, water vapour in boiler exhaust gas is condensed, from discharging, mixed tail gas outlet no longer condenses, therefore at discharge tower, this externally no longer sees having white mist to produce, beautify near the landscape effect of exhaust port, embodied the environment-friendly function of discharge tower body.
Particle is removed principle: the particle in flue gas, rise with boiler exhaust gas and with the continuous mixed process of outdoor cold air in, the thermal and humidity environment forming in discharge tower body, is accompanied by the condensing water droplet constantly producing in mixed flue gas, makes particle constantly be increased volume; Thermal convection current is taken in the mobile process of particle mixed flue gas volume, constantly contact with absorption baffle plate, particle in flue gas is constantly blocked or adsorbs (for the second time tail gas clean-up process), the concentration of discharging particle in the mixed flue gas that discharges tower body is reduced greatly, be very beneficial for alleviating the haze weather of North City, embodied the environment-friendly function of discharge tower body.
Heat recovering process principle: boiler exhaust gas from boiler enters this energy saving and environment friendly discharge tower, vent gas treatment and the sedimentation through too much slope time of outlet from entrance to mixed tail gas; Wherein tail gas is after the Surface Contact through with exhaust gas heat retracting device, and the phase-change heat-exchange medium evaporation during the heat in high-temperature tail gas is changed by heat absorbs, tail gas cooling, and the high-temperature water vapor in tail gas is lowered the temperature and is tentatively condensed simultaneously.
Obviously, the energy-saving environmental-protection boiler exhaust emissions tower that the utility model provides, (purification, dedusting, exhaust gas heat recovery, tail gas noise remove etc.) gather multi-function in integral whole, and be independent of boiler room, its contour structures is attractive in appearance, and multiple thermal hardware (for example: installation exhaust gas heat retracting device) and application can be realized in inside.
Accompanying drawing explanation
Fig. 1 is the structural representation of two kinds of waste heat of boiler tail gas device architectures contrast schematic diagram of the prior art;
The sectional structure schematic diagram of the energy-saving environmental-protection boiler exhaust emissions tower that Fig. 2 provides for the utility model embodiment;
The surface structure schematic diagram of the energy-saving environmental-protection boiler exhaust emissions tower that Fig. 3 provides for the utility model embodiment.
The specific embodiment
Below by specific embodiment, also by reference to the accompanying drawings the utility model is described in further detail.
Referring to Fig. 2, a kind of energy-saving environmental-protection boiler exhaust emissions tower that the utility model embodiment provides, comprises discharge tower body 10, wherein:
The middle part, bottom of described discharge tower body 10 is provided with tail gas and flows into flue 1 and exhaust gas heat retracting device 2; Described tail gas flows into one end of flue 1 and is communicated with the exhaust emission pipeline of output in boiler room, and described tail gas flows into the other end of flue 1 and the Surface Contact of described exhaust gas heat retracting device 2; The bottom surrounding of described discharge tower body 10 is provided with outdoor cold wind import 11; The cold air entering from described outdoor cold wind import 11 and the boiler exhaust gas after exhaust gas heat retracting device 2 is processed lead to the middle part head-on collision chamber 4 of described discharge tower body 10 jointly;
The top of described discharge tower body 10 distributes and is provided with two exhaust uptakes 6 that integral body is S-shaped from middle part to both sides, and both sides, top are provided with mixed tail gas outlet 7; The arrival end of the exhaust uptake 6 of described S shape is communicated with middle part head-on collision chamber 4, and the port of export of the exhaust uptake 6 of described S shape is communicated with mixed tail gas outlet 7;
On the walling of flue of the exhaust uptake 6 of described S shape, be all equipped with for adsorbing the absorption baffle plate 5 of solid particulate matter.
The tail gas water smoke separation principle that condenses: because the tail gas of discharge tower body bottom flows into the tail gas inlet port of flue and the outlet of the mixed tail gas at top exists the vertical discrepancy in elevation, and there is the temperature difference in discharge tower body interior flue gas and extraneous air, therefore between outdoor cold wind import and mixed tail gas outlet, there is hot pressing, can form free convection power, do not need machine power can trend outdoor air to enter discharge tower body and mix with flue gas after from mixed tail gas exit point, discharge; High-temperature boiler tail gas is after the preliminary cooling of overheated switching heat-exchanger, enter in middle part head-on collision chamber, the tail gas also having surplus heat after now cold air and heat exchange processed clashes and mixes, impact due to two kinds of gas temperature differential, and liquefaction produces a large amount of steam rapidly, steam will carry out atomization sedimentation to a large amount of solid particles and dusty gas, thereby to the tail gas purified treatment that clashes for the first time;
Through the mist in head-on collision chamber, again constantly mix in the exhaust uptake of S shape with outdoor low temperature cold air subsequently, tail gas is constantly lowered the temperature, water vapour in boiler exhaust gas is condensed, from discharging, mixed tail gas outlet no longer condenses, therefore at discharge tower, this externally no longer sees having white mist to produce, beautify near the landscape effect of exhaust port, embodied the environment-friendly function of discharge tower body.
Particle is removed principle: the particle in flue gas, rise with boiler exhaust gas and with the continuous mixed process of outdoor cold air in, the thermal and humidity environment forming in discharge tower body, is accompanied by the condensing water droplet constantly producing in mixed flue gas, makes particle constantly be increased volume; Thermal convection current is taken in the mobile process of particle mixed flue gas volume, constantly contact with absorption baffle plate, particle in flue gas is constantly blocked or adsorbs (for the second time tail gas clean-up process), the concentration of discharging particle in the mixed flue gas that discharges tower body is reduced greatly, be very beneficial for alleviating the haze weather of North City, embodied the environment-friendly function of discharge tower body.
Heat recovering process principle: boiler exhaust gas from boiler enters this energy saving and environment friendly discharge tower, vent gas treatment and the sedimentation through too much slope time of outlet from entrance to mixed tail gas; Wherein tail gas is after the Surface Contact through with exhaust gas heat retracting device, and the phase-change heat-exchange medium evaporation during the heat in high-temperature tail gas is changed by heat absorbs, tail gas cooling, and the high-temperature water vapor in tail gas is lowered the temperature and is tentatively condensed simultaneously.
The concrete structure of the energy-saving environmental-protection boiler exhaust emissions tower below the utility model embodiment being provided is done and is further illustrated:
Wherein, described absorption baffle plate 5 comprises metal screen or filter paper, active carbon filter plate, electrostatic dust-collecting device or other porous adsorbing materials (this is repeated no longer one by one); Described absorption baffle plate 5 removably connects with described discharge tower body 10.
It should be noted that, absorption baffle plate can be used porous filtering material, as nonwoven, metal screen, active carbon filter plate, filter paper, fiber, foam cotton etc. (HEPA high-density air filter material is counted in working as that adsorption capacity is the strongest at present), suspended particulate in absorbed air, pernicious gas, and mist is carried out to enrichment, thereby purify air.Or employing electrostatic dust-collecting device: make in tail gas pollutant charged by static, then adsorbed the dirt in air of charged particle with dust collect plant trapping, reach the object that purifies air.
Preferably, described mixed tail gas exports 7 places and is also provided with the absorption blinds (not shown) of eliminating the noise, and described noise elimination absorption blinds and described discharge tower body 10 removably connect.
Preferably, described tail gas flows into flue 1 outer wall and is provided with flue layer.
Preferably, described discharge tower body 10 comprises cuboid tower body 101 and herringbone tower lid 102; Described cuboid tower body 101 and herringbone tower lid 102 are color steel (can also select the heat conductor material that other heat-transfer effects are good to substitute color steel) and build.
It should be noted that, in the structure of energy-saving environmental-protection boiler exhaust emissions tower, take color steel as architecture basics, a plurality of color steels are fixedly connected with the structure that can form discharge tower body.
Preferably, the bottom of described discharge tower body 10 is also provided with grounding-for-lightning device 103.
Preferably, referring to Fig. 3, the front of described discharge tower body 10 is also provided with repair and maintenance door 104.
Said structure is taken turns doing to explanation once below:
It should be noted that (1) demist reliability consideration: in order to be conducive to the water recovery in tail gas, treating column top board and riser all adopt the sheet metal of good heat-transfer to make (as color steel); In addition, the runner for the treatment of column top mixed tail gas is arranged to snakelike, can increase the time of staying of mixed tail gas in tower, increases condensation vapor degree and the seizure degree to particle;
(2) lightning protection is considered: due to treating column be arranged at outdoor and for building enclosure is metal material, for use safely treating column arrange bottom grounding-for-lightning device;
(3) consideration of noise prevention: because boiler exhaust gas discharge flue connects boiler room, in boiler room, equipment is more, may there is the equipment running noises of boiler room to discharge and affect environment from exhaust port, for noise isolation, treating column is set to enclosed construction, the outer cold air inlet of tower and mixed tail gas floss hole all adopt noise elimination blinds, can effectively prevent noise pollution;
(4) boiler exhaust gas road insulation: to the strengthening insulation of boiler exhaust gas road, prevent that boiler exhaust gas from producing condensate water in smokejack in treating column, refluence back boiler affects equipment normally to be used;
(5) repair and maintenance convenience is considered: treating column arranges openable repair and maintenance door, while closing at ordinary times maintenance, can open; In tower, each interception absorption baffle plate, noise elimination blinds are all set to removably, after operation some cycles, can clean and change according to the tail gas particulate pollutant that is blocked isolation.
Compare with existing boiler exhaust gas treating apparatus, the energy-saving environmental-protection boiler exhaust emissions tower that the utility model embodiment provides has following advantage:
(1) multi-functional: the integrated several functions such as boiler exhaust gas recuperation of heat, the isolation of boiler exhaust gas smog, the removal of boiler exhaust gas particle, exhaust port noise processed, the improvement of floss hole view are in one.By high efficiency gravity formula heat exchange of heat pipe recovery boiler using waste heat from tail gas, by serpentine flow path structure, guarantee that the cooling of tail gas in tower condense, prevent that steam from condensing at tower outward, multiple tracks interception absorption baffle plate is set, particle in tail gas is effectively caught after assembling under thermal and humidity environment in tower, the absorption blinds of eliminating the noise is set and enters exhaust outlet, reduce the displacement noise at boiler exhaust gas floss hole place.
(2) facility is installed: this boiler exhaust gas treating column is installed simple, can carry out specific aim design according to site condition outside floss hole sections, as long as guarantee enough free air spaces in treating column, be not subject to the restriction of e-quipment and pipe arrangement space in boiler room, also avoided with equipment room in the intersecting of various pipelines and equipment, construction cost is low.Vent gas treatment to newly constructed boiler room and reconstruction boiler room is all applicable.
(3) good reliability: treating column machinery-free movable part, long service life (more than 10 years); Equipment maintenance repair is easy to maintenance.
(4) landscape effect is good: change traditional lofty landscape impact of boiler exhaust gas floss hole, floss hole is arranged to view class building, take into account the coordinating and unifying of floss hole and neighboring buildings outdoor environment, vent gas treatment tower is handsome in appearance, and the installation of discharge tower is arranged at architectural environment organic unity.
The energy-saving environmental-protection boiler exhaust emissions tower that the utility model embodiment provides can treat cleaning of off-gas carry out multistage (be many slopes time), continuously, purification, enrichment and the sedimentation of the atmosphere scale of construction process, it is very obvious to boiler exhaust gas purification treatment technology effect, can reach quite high effect purification efficiency; This device is to the removal efficiency of sulfur dioxide for higher, and reaction rate is high;
The energy-saving environmental-protection boiler exhaust emissions tower that the utility model embodiment provides, can carry out effective air cleaning to gas fired-boiler exhaust emissions, meets atmosphere pollutants emission standards.When reclaiming tail gas waste heat, reduce the destruction of pollutant to atmospheric environment in tail gas, especially to North City winter, reduce white smoke that high-temperature tail gas floss hole the is strong destruction to visual Landscape, reduce the solid particulate matters such as PM2.5 in flue gas to the discharge of atmospheric environment, alleviate the haze weather of North City, simultaneously such energy-saving environmental-protection boiler exhaust emissions tower also has easy transformation, (mostly being dismountable connected mode) easy to assemble, the characteristic such as easy to maintenance, it is easy that it manufactures installation steps, compact conformation, volume is little, floor space is little.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (7)
1. an energy-saving environmental-protection boiler exhaust emissions tower, is characterized in that,
Comprise discharge tower body, wherein:
The middle part, bottom of described discharge tower body is provided with tail gas and flows into flue and exhaust gas heat retracting device; One end that described tail gas flows into flue is communicated with boiler room exhaust emission pipeline, and described tail gas flows into the other end of flue and the Surface Contact of described exhaust gas heat retracting device; The bottom surrounding of described discharge tower body is provided with outdoor cold wind import; The cold air entering from described outdoor cold wind import and the boiler exhaust gas after exhaust gas heat retracting device is processed lead to the middle part head-on collision chamber of described discharge tower body jointly;
The top of described discharge tower body distributes and is provided with two exhaust uptakes that integral body is S-shaped from middle part to both sides, and both sides, top are provided with mixed tail gas outlet; The arrival end of the exhaust uptake of described S shape is communicated with middle part head-on collision chamber, and the port of export of the exhaust uptake of described S shape is communicated with mixed tail gas outlet;
On the walling of flue of the exhaust uptake of described S shape, be all equipped with for adsorbing the absorption baffle plate of solid particulate matter.
2. energy-saving environmental-protection boiler exhaust emissions tower as claimed in claim 1, is characterized in that,
Described absorption baffle plate comprises metal screen or filter paper, active carbon filter plate, electrostatic dust-collecting device; Described absorption baffle plate and described discharge tower body removably connect.
3. energy-saving environmental-protection boiler exhaust emissions tower as claimed in claim 1, is characterized in that,
Described mixed tail gas exit is also provided with the absorption blinds of eliminating the noise, and described noise elimination absorption blinds and described discharge tower body removably connect.
4. energy-saving environmental-protection boiler exhaust emissions tower as claimed in claim 1, is characterized in that,
Described tail gas flows into flue outer wall and is provided with flue layer.
5. energy-saving environmental-protection boiler exhaust emissions tower as claimed in claim 1, is characterized in that,
Described discharge tower body comprises cuboid tower body and herringbone tower lid; Described cuboid tower body and herringbone tower lid are color steel and build.
6. energy-saving environmental-protection boiler exhaust emissions tower as claimed in claim 5, is characterized in that,
The bottom of described discharge tower body is also provided with grounding-for-lightning device.
7. energy-saving environmental-protection boiler exhaust emissions tower as claimed in claim 6, is characterized in that,
The front of described discharge tower body is also provided with repair and maintenance door.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420371832.XU CN203963979U (en) | 2014-07-07 | 2014-07-07 | Energy-saving environmental-protection boiler exhaust emissions tower |
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| CN201420371832.XU CN203963979U (en) | 2014-07-07 | 2014-07-07 | Energy-saving environmental-protection boiler exhaust emissions tower |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104048306A (en) * | 2014-07-07 | 2014-09-17 | 新疆中云智能科技有限公司 | Energy-saving environment-friendly boiler tail gas exhaust tower |
| CN107676979A (en) * | 2017-10-26 | 2018-02-09 | 无锡佳豪手套有限公司 | Produce the reducing energy consumption type heating boiler device and method thereof of rubber gloves |
| CN110791992A (en) * | 2019-11-06 | 2020-02-14 | 江苏科技大学 | A kind of dewhitening device for tail gas of papermaking drying section and its working method |
-
2014
- 2014-07-07 CN CN201420371832.XU patent/CN203963979U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104048306A (en) * | 2014-07-07 | 2014-09-17 | 新疆中云智能科技有限公司 | Energy-saving environment-friendly boiler tail gas exhaust tower |
| CN104048306B (en) * | 2014-07-07 | 2016-05-18 | 新疆中云智能科技有限公司 | Energy-saving environmental-protection boiler exhaust emissions tower |
| CN107676979A (en) * | 2017-10-26 | 2018-02-09 | 无锡佳豪手套有限公司 | Produce the reducing energy consumption type heating boiler device and method thereof of rubber gloves |
| CN110791992A (en) * | 2019-11-06 | 2020-02-14 | 江苏科技大学 | A kind of dewhitening device for tail gas of papermaking drying section and its working method |
| CN110791992B (en) * | 2019-11-06 | 2021-04-06 | 江苏科技大学 | A kind of dewhitening device for tail gas of papermaking drying section and its working method |
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