CN108543382A - A kind of phosphoric acid tail gas purification recovery device - Google Patents
A kind of phosphoric acid tail gas purification recovery device Download PDFInfo
- Publication number
- CN108543382A CN108543382A CN201810470316.5A CN201810470316A CN108543382A CN 108543382 A CN108543382 A CN 108543382A CN 201810470316 A CN201810470316 A CN 201810470316A CN 108543382 A CN108543382 A CN 108543382A
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- China
- Prior art keywords
- shell
- tail gas
- phosphoric acid
- gas purification
- recovery device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 title claims abstract description 76
- 229910000147 aluminium phosphate Inorganic materials 0.000 title claims abstract description 38
- 238000000746 purification Methods 0.000 title claims abstract description 26
- 238000011084 recovery Methods 0.000 title claims abstract description 26
- 238000004140 cleaning Methods 0.000 claims abstract description 14
- 239000010865 sewage Substances 0.000 claims abstract description 10
- 239000007788 liquid Substances 0.000 claims description 20
- 239000000835 fiber Substances 0.000 claims description 15
- 241000521257 Hydrops Species 0.000 claims description 12
- 206010030113 Oedema Diseases 0.000 claims description 12
- 238000012856 packing Methods 0.000 claims description 12
- 239000003595 mist Substances 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 8
- 239000012530 fluid Substances 0.000 claims description 7
- 238000012544 monitoring process Methods 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 7
- 239000000126 substance Substances 0.000 abstract description 3
- 238000000926 separation method Methods 0.000 description 15
- 239000002253 acid Substances 0.000 description 9
- 239000000243 solution Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- 239000000428 dust Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 230000020477 pH reduction Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 238000003911 water pollution Methods 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012717 electrostatic precipitator Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- ISIJQEHRDSCQIU-UHFFFAOYSA-N tert-butyl 2,7-diazaspiro[4.5]decane-7-carboxylate Chemical compound C1N(C(=O)OC(C)(C)C)CCCC11CNCC1 ISIJQEHRDSCQIU-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 239000003082 abrasive agent Substances 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000005202 decontamination Methods 0.000 description 1
- 230000003588 decontaminative effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 244000144972 livestock Species 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 230000000306 recurrent effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
- B01D50/10—Combinations of devices covered by groups B01D45/00, B01D46/00 and B01D47/00
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention belongs to chemical technology fields, more particularly to a kind of phosphoric acid tail gas purification recovery device, including shell, the lower part of the side wall of the shell is provided with medium inlet, it is provided with media outlet on the roof of the shell, it is provided with sewage draining exit on the bottom wall of the shell, the medium inlet is located at the top of the sewage draining exit, pretreatment unit, cleaning device and fixed plate are disposed in the shell from the bottom to top, several demisting filter cores are provided in the fixed plate, the pretreatment unit is located at the top of the medium inlet;The phosphoric acid tail gas purification recovery device of the present invention is simple and reasonable, phosphoric acid tail gas is entered through medium inlet in shell, first pass through the pretreatment of pretreatment unit, the pollution concentration of the tail gas of discharge is set to be far below discharge standard using demisting filter core advanced treating, it can be extensively using chemical technology field.
Description
Technical field
The invention belongs to chemical technology fields, and in particular to a kind of phosphoric acid tail gas purification recovery device.
Background technology
In phosphorous acid production by BEP, P in the tail gas of discharge2O5Content is often exceeded, if being directly discharged into air, causes serious
Atmosphere pollution.In addition, phosphorous gas, which is either in gas form or liquid form, all has very strong corrosivity, condensate liquid
If not recycled, a large amount of wasting of resources is not only caused, also causes soil acidification, water pollution, to influence vegetation growth,
Livestock, personal safety etc..Therefore, the processing of today increasingly stringent in environmental requirement, phosphoric acid plant tail gas just seem particularly heavy
It wants.Currently, the processing of phosphorous acid production by BEP tail gas clean-up is frequently with mechanical separator, electrostatic precipitator and fiber mist eliminator:
Mechanical separator includes rotational flow plate defroster and wire mesh demister, rotational flow plate defroster separation accuracy and separative efficiency
It is not high, and it is not easy to decontamination;Wire mesh demister separative efficiency is not high, more apparent to 10 μm or more of big drop separation effect,
The phenomenon that fine drop is difficult to detach, and is easy to generate entrainment, therefore separative efficiency is not high;
Electrostatic precipitator power consumption is big, and demisting electrode must give more due to the adherency of dust and the formation of insulating coating
It changes, in addition, the destruction of porcelain insulator, cracking are recurrent, operation is caused to be obstructed.Fiber mist eliminator separative efficiency is 90%
Left and right, above various situations not only bring larger energy consumption to bear, also increase dismounting frequency of maintenance to production run, to
Considerably increase operating cost;
Fiber demisting is by droplet according to principles such as inertial collision, interception, Blang's diffusion, electrostatic, gravitational settlings from air-flow
Middle removing.Currently, the pattern of fiber mist eliminator has drum type brake, bevel-type, box etc., it is in these structures, the most general with drum type brake
Time.Which kind of demister element is selected according to field working conditions condition, process characteristic to determine, what application was most at present is exactly demisting filter cylinder,
Its volume is larger, and great inconvenience is caused to installation and repair.
Invention content
In order to solve the above problem of the existing technology, the present invention provides a kind of phosphoric acid tail gas purification recovery device,
For the hot-process phosphoric acid tail-gas processing unit low separation efficiency of the prior art, operating cost is high, complex structure and other problems and research and develop,
Have many advantages, such as that simple in structure, separative efficiency is high, separation accuracy is high, be easily installed maintenance.
The present invention implements by the following technical programs:
A kind of phosphoric acid tail gas purification recovery device of the present invention, including shell, the lower part of the side wall of the shell are provided with
Medium inlet is provided with media outlet on the roof of the shell, sewage draining exit, the medium is provided on the bottom wall of the shell
Entrance is located at the top of the sewage draining exit, is disposed with pretreatment unit, cleaning device in the shell from the bottom to top and consolidates
Fixed board is provided with several demisting filter cores in the fixed plate, and the pretreatment unit is located at the top of the medium inlet.
Further, the pretreatment unit is the structured packing being arranged in shell.Preferably, the structured packing is
Structural member made of stainless steel material or Carbon fibe material.
Further, the cleaning device includes sparge pipe and the atomizer that is arranged on sparge pipe, and the atomization is sprayed
The injection direction of head is towards the pretreatment unit.
Further, the demisting filter core is arranged in the middle part of the fixed plate, the edge of the fixed plate and the shell
The inside of the side wall of body connects, and has hydrops slot between the inside of the side wall of the edge of the fixed plate and the shell, described
Leakage fluid dram is additionally provided on the side wall of shell to be connected to the hydrops slot.
Further, the first liquid level gauge for monitoring long-pending liquid level of liquid tank is additionally provided on the shell.
Further, the demisting filter core includes the inner frame set gradually from inside to outside, fiber bed, outer skeleton and leads
Fluid layer, the inner frame, fiber bed, outer skeleton and guide layer are tubular, the top and bottom difference of the demisting filter core
Be provided with upper end and lower end, the upper end head sealed of the demisting filter core, the lower end of the demisting filter core by lower end with
The fixed plate is detachably connected and is connected to the enclosure interior below fixed plate.
Specifically, the lower end is threadedly coupled with the fixed plate.
Further, the second liquid level gauge for monitoring housing bottom liquid level is additionally provided on the shell.
Further, further include skirt, the shell is arranged on the skirt, and the skirt passes through foundation bolt and ground
Face is connected and fixed.
Based on above technical scheme, technique effect of the invention is:
The phosphoric acid tail gas purification recovery device of the present invention is simple and reasonable, and phosphoric acid tail gas first passes through pre- place after entering shell
Reason device crude separation is segmented using demisting filter core from can not only detach solid particle but also can have been dripped with separation of phosphorus acid mist, and specifically make
Used time gas solid separation, gas-liquid separation are carried out at the same time, and separative efficiency is high, and Pollutant emission concentration in tail gas is made to be marked far below discharge
Standard, caused by prevent tail gas direct emission phenomena such as soil acidification, water pollution.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Obtain other attached drawings according to these attached drawings.
Fig. 1 is the structural schematic diagram of the phosphoric acid tail gas purification recovery device of the embodiment of the present invention;
Fig. 2 is the structural schematic diagram of the demisting filter core of the phosphoric acid tail gas purification recovery device of the embodiment of the present invention.
In figure:
1- shells, the medium inlets 11-, 12- media outlets, 13- sewage draining exits, 14- leakage fluid drams;
2- pretreatment units;
3- cleaning devices, 31- sparge pipes, 32- atomizers;
4- fixed plates;
5- demisting filter cores, 51- inner frames, 52- fiber beds, the outer skeletons of 53-, 54- guide layers, 55- upper ends, under 56-
End;
6- hydrops slots;
7- first liquid level gauges;
8- second liquid level gauges;
9- skirts;
10- foundation bolts.
Specific implementation mode
To make the object, technical solutions and advantages of the present invention clearer, technical scheme of the present invention will be carried out below
Detailed description.Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, those of ordinary skill in the art are obtained all without making creative work
Other embodiment belongs to the range that the present invention is protected.
Embodiment 1:
As shown in Fig. 1~Fig. 2, a kind of phosphoric acid tail gas purification recovery device, including shell 1 are present embodiments provided, it is described
The lower part of the side wall of shell 1 is provided with medium inlet 11, and media outlet 12, the shell 1 are provided on the roof of the shell 1
Bottom wall on be provided with sewage draining exit 13, the medium inlet 11 is located at the top of the sewage draining exit 13.In the shell 1 by down toward
On be disposed with pretreatment unit 2, cleaning device 3 and fixed plate 4, several demisting filter cores 5 are provided in the fixed plate 4,
The pretreatment unit 2 is located at the top of the medium inlet 11.
When specifically used, phosphoric acid tail gas is entered the phosphoric acid tail gas purification recovery device of the present embodiment by medium inlet 11
To the inside of shell 1, droplet and dust particles larger in tail gas are adsorbed or filtered by pretreatment unit 2, is detached
Acid mist drop out is collected in the bottom of shell 1.As further improvement of this embodiment, it is arranged on the shell 1 useful
In the second liquid level gauge 8 of monitoring 1 bottoms level of shell, when the acid solution of 1 bottom collection of shell reaches a certain amount of, shell 1 is opened
Acid solution is discharged in the sewage draining exit 13 of bottom.
Specifically, the pretreatment unit 2 is the structured packing being arranged in shell 1, and phosphoric acid tail gas moves upwards process
In, it through structured packing collision, intercepts and the effects that compared with big droplet and dust particles Brownian movement, gravitational settling, in phosphoric acid tail gas
Relatively big droplet and dust particles by initial gross separation.
Specifically, structured packing is high and acid corrosion-resistant, heat safe material are made by intensity, as preferably selecting, advises
Whole filler is structural member made of carbon fibre material or stainless steel material.
Specifically, it is to enhance pretreatment unit 2 to the cleaning capacity of phosphoric acid droplet and dust particles, the cleaning device 3
Including sparge pipe 31 and the atomizer 32 that is arranged on sparge pipe 31, the injection direction of the atomizer 32 is towards described pre-
Processing unit 2.Further, filter washing water inlet is provided on the side wall of the shell 1, sparge pipe 31 is entered by the cleaning solution
Mouth enters in shell 1.Atomizer 32 can be combined to be formed with smaller phosphoric acid droplet towards structured packing water spray, water mist
Larger larger droplet, through being gravitationally fallen to 1 bottom of shell.The water mist that atomizer 32 is sprayed towards structured packing can also
The granule foreign deposited in cleaning structured packing, cleaning action is played to structured packing, and structured packing blocking is avoided to cause pre- place
The cleaning effect for managing device 2 is undesirable.
Specifically, the demisting filter core 5 is arranged in the middle part of the fixed plate 4, the edge of the fixed plate 4 and the shell
The inside of the side wall of body 1 connects, and has hydrops slot 6 between the inside of the side wall of the edge of the fixed plate 4 and the shell 1,
Leakage fluid dram 14 is additionally provided on the side wall of the shell 1 to be connected to the hydrops slot 6.
As further improvement of this embodiment, first for monitoring 6 liquid level of hydrops slot is additionally provided on the shell 1
Liquid level gauge 7, when the acid solution in hydrops slot 6 reaches a certain amount of, acid solution is discharged in the leakage fluid dram 14 opened on 1 side wall of shell.
Specifically, the demisting filter core 5 includes inner frame 51, fiber bed 52, the outer skeleton set gradually from inside to outside
53 and guide layer 54, the inner frame 51, fiber bed 52, outer skeleton 53 and guide layer 54 are tubular, the demisting filter core 5
Top and bottom be respectively arranged with upper end 55 and lower end 56, the upper end 55 of the demisting filter core 5 is closed, the demisting
The lower end of filter core 5 is detachably connected with the fixed plate 4 by lower end 56 and is connected to 1 inside of shell of 4 lower section of fixed plate.
As preferably selecting, in terms of selection, inner frame 51, outer skeleton 53 and the guide layer 54 of the demisting filter core 5 be it is corrosion-resistant,
High temperature resistant and anti-abrasive material are made.
After smaller liquid mist enters in demisting filter core 5, when across fiber bed 53, formed after liquid mist multiple impacts
The drop of fiber is surrounded, small drop is collected and is adsorbed under the action of the collision of fibre bed, interception and Brownian movement
On filament and tends to assemble, agglomerate.When the drop that cohesion is grown up is sufficiently large hydrops is deposited to along guide layer 64 because of gravity
In slot 6, it is discharged through leakage fluid dram 14 when the acid solution in hydrops slot 6 reaches a certain amount of.
Further, further include skirt 9, for the setting of the shell 1 on the skirt 9, the skirt 9 passes through foundation bolt
10 are connected and fixed with ground.
Based on above technical scheme, the technique effect of the present embodiment is:
The phosphoric acid tail gas purification recovery device of the first, the present embodiment is simple and reasonable, and phosphoric acid tail gas enters after shell 1 first
It is segmented using demisting filter core 5 from can not only detach solid particle but also can be with separation of phosphorus acid mist by 2 crude separation of pretreatment unit
Drop, when specifically used gas solid separation, gas-liquid separation be carried out at the same time, separative efficiency is high, keeps Pollutant emission concentration in tail gas far low
In discharge standard, caused by prevent tail gas direct emission phenomena such as soil acidification, water pollution.
The second, the phosphoric acid production device of 1.5 ten thousand tons of year output, using the phosphoric acid tail gas purification recovery device of the present embodiment
About 30 tons of phosphoric acid can be recycled within 1 year, had not only prevented pollution problem caused by tail gas direct emission, but also create economic value.
The phosphoric acid tail gas purification recovery device Non-energy-consumption during use of third, the present embodiment, pressure difference it is small in 3Kpa hereinafter,
It avoids equipment equipment because caused by pressure difference is excessive to stop, overhaul the problems such as frequent, ensures production continuous and steady operation.
4th, the demisting filter core 5 of the phosphoric acid tail gas purification recovery device of the present embodiment can be adapted to according to use condition
Property design, in addition, demisting filter core 5 can not only carry out gas-liquid separation but also can carry out gas solid separation, be detachably connected with fixed plate 4
It is easy to dismounting cleaning, reuses, to which operating cost be greatly saved, selects corrosion-resistant, high temperature resistant, abrasion resisting material, have
Effect extends the service life of demisting filter core 5.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.
Claims (10)
1. a kind of phosphoric acid tail gas purification recovery device, it is characterised in that:Including shell (1), the lower part of the side wall of the shell (1)
It is provided with medium inlet (11), is provided with media outlet (12) on the roof of the shell (1), on the bottom wall of the shell (1)
It is provided with sewage draining exit (13), the medium inlet (11) is located at the top of the sewage draining exit (13);
It is disposed with pretreatment unit (2), cleaning device (3) and fixed plate (4) from the bottom to top in the shell (1), it is described
Several demisting filter cores (5) are provided in fixed plate (4), the pretreatment unit (2) is located at the top of the medium inlet (11).
2. phosphoric acid tail gas purification recovery device according to claim 1, it is characterised in that:The pretreatment unit (2) is
Structured packing in shell (1) is set.
3. phosphoric acid tail gas purification recovery device according to claim 2, it is characterised in that:The structured packing is stainless steel
Structural member made of material or Carbon fibe material.
4. phosphoric acid tail gas purification recovery device according to claim 1, it is characterised in that:The cleaning device (3) includes
Sparge pipe (31) and atomizer (32) on sparge pipe (31) is set, the injection direction of the atomizer (32) is towards institute
State pretreatment unit (2).
5. phosphoric acid tail gas purification recovery device according to claim 1, it is characterised in that:Demisting filter core (5) setting
The edge at the middle part in the fixed plate (4), the fixed plate (4) is connect with the inside of the side wall of the shell (1), described solid
There is hydrops slot (6) between the edge of fixed board (4) and the inside of the side wall of the shell (1), gone back on the side wall of the shell (1)
Leakage fluid dram (14) is provided with to be connected to the hydrops slot (6).
6. phosphoric acid tail gas purification recovery device according to claim 5, it is characterised in that:It is also set up on the shell (1)
It is useful for the first liquid level gauge (7) of monitoring hydrops slot (6) liquid level.
7. according to any phosphoric acid tail gas purification recovery device of claim 1~6, it is characterised in that:The demisting filter core
(5) include the inner frame (51) set gradually from inside to outside, fiber bed (52), outer skeleton (53) and guide layer (54), it is described
Inner frame (51), fiber bed (52), outer skeleton (53) and guide layer (54) are tubular, the upper end of the demisting filter core (5)
It is respectively arranged with upper end (55) and lower end (56) with lower end, upper end (55) closing of the demisting filter core (5) is described to remove
The lower end of mist filter core (5) be detachably connected by lower end (56) and the fixed plate (4) and with the shell below fixed plate (4)
(1) internal connection.
8. phosphoric acid tail gas purification recovery device according to claim 7, it is characterised in that:The lower end (56) with it is described
Fixed plate (4) is threadedly coupled.
9. according to any phosphoric acid tail gas purification recovery device of claim 1~6, it is characterised in that:On the shell (1)
It is additionally provided with the second liquid level gauge (8) for monitoring shell (1) bottoms level.
10. phosphoric acid tail gas purification recovery device according to claim 1, it is characterised in that:Further include skirt (9), it is described
Shell (1) is arranged on the skirt (9), and the skirt (9) is connected and fixed by foundation bolt (10) with ground.
Priority Applications (1)
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CN201810470316.5A CN108543382A (en) | 2018-05-16 | 2018-05-16 | A kind of phosphoric acid tail gas purification recovery device |
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CN201810470316.5A CN108543382A (en) | 2018-05-16 | 2018-05-16 | A kind of phosphoric acid tail gas purification recovery device |
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Publication number | Priority date | Publication date | Assignee | Title |
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CN109499215A (en) * | 2018-12-29 | 2019-03-22 | 上海华林工业气体有限公司 | A kind of chemical plant facility or power plants equipment gas safety environment protection emission device |
CN109692541A (en) * | 2019-01-15 | 2019-04-30 | 北京博鹏中科环保科技有限公司 | A kind of flue gas high-efficiency dust remover |
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Application publication date: 20180918 |