CN206837850U - A kind of spiral drop filter tower and exhaust treatment system - Google Patents
A kind of spiral drop filter tower and exhaust treatment system Download PDFInfo
- Publication number
- CN206837850U CN206837850U CN201720147504.5U CN201720147504U CN206837850U CN 206837850 U CN206837850 U CN 206837850U CN 201720147504 U CN201720147504 U CN 201720147504U CN 206837850 U CN206837850 U CN 206837850U
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- Prior art keywords
- spiral
- tower body
- drop filter
- nutrient solution
- filter tower
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Treating Waste Gases (AREA)
Abstract
It the utility model is related to field of environment protection equipment, provide a kind of spiral drop filter tower, including tower body, multiple spiral chambers are provided with tower body, nutrient solution spiral spray pipe is provided with each helical cavity room, the tube wall of nutrient solution spiral spray pipe is provided with multiple spray holes, the bottom of tower body is provided with air inlet and discharging opening, gas outlet and inlet are provided with the top of tower body, the top of each spiral chamber connects with gas outlet, and is connected with inlet；The bottom of each spiral chamber connects with air inlet, and is connected with discharging opening.The spiral drop filter tower is simple in construction and preferable to the treatment effect of waste gas.The utility model additionally provides a kind of exhaust treatment system, including the above-mentioned spiral drop filter tower being serially connected, the exhaust treatment system are preferable to the regulation effect of waste gas.
Description
Technical field
Field of environment protection equipment is the utility model is related to, in particular to a kind of spiral drop filter tower and exhaust-gas treatment system
System.
Background technology
The organic matter of the variety classes various concentrations often contained in industrial waste gas, it is the predecessor of haze and ozone, directly
It is quite serious to discharge other side's environmental hazard.Biological method purification organic matter has unique advantage, is currently used organic exhaust gas
The method of processing, bio-trickling filter are the common equipments for biological cleaning organic exhaust gas.But there is battalion in existing bio-trickling filter
The problem of nutrient solution spray is uneven, and biologic packing material utilization rate is low, at the same it is insufficient with biofilm contact there is also organic exhaust gas, effectively
The problem of microbial biomass utilization rate is low.
Utility model content
The utility model provides a kind of spiral drop filter tower, it is intended to improves existing most few drops of filter towers nutrient solution spray not
, the problem of filler utilization rate is low, and strengthen waste gas and biofilm contact simultaneously, improve treatment effeciency.
The utility model additionally provides a kind of exhaust treatment system, and its effect to exhaust-gas treatment is preferable.
What the utility model was realized in：
It is a kind of spirally to drip filter tower, including tower body, multiple spiral chambers are provided with tower body, are all provided with each helical cavity room
Nutrient solution spiral spray pipe is equipped with, the tube wall of nutrient solution spiral spray pipe is provided with multiple spray holes, and the bottom of tower body is provided with
Air inlet and discharging opening, gas outlet and inlet are provided with the top of tower body, and the top of each spiral chamber connects with gas outlet
It is logical, and connected with inlet；The bottom of each spiral chamber connects with air inlet, and is connected with discharging opening.
Further, in the utility model preferred embodiment, the nutrient solution spiral spray pipe in each helical cavity room
Quantity be at least 2, at least two nutrient solution spiral spray pipe is uniformly arranged on the inwall that tower body corresponds to spiral chamber.
Further, in the utility model preferred embodiment, length of multiple spray holes along nutrient solution spiral spray pipe
Degree direction is uniformly arranged.
Further, high-pressure spraying device, high pressure spray are provided with the utility model preferred embodiment, at the top of tower body
Leaching device connects with inlet, and high-pressure spraying device includes multiple shower nozzles, the quantity of shower nozzle and position with the quantity in helical cavity room
It is corresponding with position, nutrient solution spiral spray pipe connection of each shower nozzle and in the helical cavity room corresponding with shower nozzle.
Further, in the utility model preferred embodiment, the bottom of tower body is provided with for closing discharging opening
Discharge lid, and air inlet is arranged at discharging lid.
Further, in the utility model preferred embodiment, the edge for the lid that discharges sets seal washer.
Further, in the utility model preferred embodiment, discharging opening cover outer wall is set close to discharging lid edge
Be equipped with multiple fasteners, the outer wall that discharging opening corresponds to tower body is provided with multiple fasteners, multiple fasteners corresponded with multiple fasteners and
Cooperate.
Further, in the utility model preferred embodiment, each spiral chamber is correspondingly arranged on and air inlet
The air inlet pipe of connection, the bottom of the outlet sides of more air inlet pipe respectively with multiple spiral chambers connect.
Further, in the utility model preferred embodiment, in addition to air blower, the bottom of tower body be additionally provided with
The air intlet that multiple spiral chambers connect, air blower connect with air intlet.
A kind of exhaust treatment system, including above-mentioned multiple spiral drop filter towers, multiple spiral drop filter towers are sequentially connected in series.
The beneficial effects of the utility model are：The spiral drop filter tower that the utility model is obtained by above-mentioned design, it is multiple
Spiral chamber helical spiral design, nutrient solution spiral spray pipe are uniformly arranged on the inwall that tower body corresponds to spiral chamber, improve existing
There is the problem of most few drops of filter towers nutrient solution spray is uneven, filler utilization rate is low, extend waste gas by the time of microbiological treatment,
Strengthen waste gas and biofilm contact so that the composition that the needs in waste are removed can be processed more complete.This practicality
The new exhaust treatment system obtained by above-mentioned design, due to including multiple above-mentioned spiral drop filter towers being serially connected, its
There is preferable treatment effect to waste gas.
Brief description of the drawings
, below will be to required in embodiment in order to illustrate more clearly of the technical scheme of the utility model embodiment
The accompanying drawing used is briefly described, it will be appreciated that and the following drawings illustrate only some embodiments of the present utility model, therefore not
The restriction to scope is should be considered as, for those of ordinary skill in the art, on the premise of not paying creative work,
Other related accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation for the spiral drop filter tower that the utility model embodiment provides；
Fig. 2 is Fig. 1 partial internal structure perspective view；
Fig. 3 is the sectional view of tower body in Fig. 1；
Fig. 4 is the part-structure schematic diagram of nutrient solution spiral spray pipe in Fig. 3；
Fig. 5 is the structural representation that tower body bottom sets the anti-place that slips through the net；
Fig. 6 is the enlarged drawing in VI region in Fig. 2.
Icon：100- spirally drips filter tower；110- tower bodies；111- spiral chambers；112- nutrient solution spiral spray pipes；113-
Spray hole；114- air inlets；115- discharging openings；116- gas outlets；117- air inlet pipe；118- inlet manifold；119- inlets；
120- high-pressure spraying devices；121- shower nozzles；130- discharging lids；131- seal washers；132- fasteners；133- fasteners；134- air
Import；135- is anti-to slip through the net；140- air blowers.
Embodiment
To make the purpose, technical scheme and advantage of the utility model embodiment clearer, below in conjunction with this practicality
Accompanying drawing in new embodiment, the technical scheme in the utility model embodiment is clearly and completely described, shown
So, described embodiment is a part of embodiment of the utility model, rather than whole embodiments.Based on this practicality
Embodiment in new, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of the utility model protection.Therefore, the implementation of the present utility model to providing in the accompanying drawings below
The detailed description of mode is not intended to limit claimed the scope of the utility model, but is merely representative of of the present utility model
Selected embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not making creative labor
The every other embodiment obtained under the premise of dynamic, belong to the scope of the utility model protection.
In description of the present utility model, it is to be understood that term " length ", " on ", " under ", " vertical ", " level ",
The orientation or position relationship of the instruction such as " top ", " bottom ", " interior ", " outer " are based on orientation shown in the drawings or position relationship, are only
Described for the ease of description the utility model and simplifying, rather than instruction or imply signified equipment or element must have it is specific
Orientation, with specific azimuth configuration and operation, therefore it is not intended that to limitation of the present utility model.
In addition, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed or
Implicitly include one or more this feature.In description of the present utility model, " multiple " are meant that two or two
More than, unless otherwise specifically defined.
In the utility model, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. term should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally；Can be
Mechanically connect or be joined directly together, can also be indirectly connected by intermediary, can be the connection of two element internals
Or the interaction relationship of two elements.For the ordinary skill in the art, on can understanding as the case may be
State concrete meaning of the term in the utility model.
In the utility model, unless otherwise clearly defined and limited, fisrt feature second feature it " on " or it
" under " can directly be contacted including the first and second features, it is not directly to contact but lead to that can also include the first and second features
The other characterisation contact crossed between them.Moreover, fisrt feature second feature " on ", " top " and " above " include the
One feature is directly over second feature and oblique upper, or is merely representative of fisrt feature level height and is higher than second feature.First is special
Sign second feature " under ", " lower section " and " below " including fisrt feature immediately below second feature and obliquely downward, or only
Represent that fisrt feature level height is less than second feature.
Refer to shown in Fig. 1 and Fig. 2, the utility model provides a kind of spiral drop filter tower 100, and it includes tower body 110,
Multiple spiral chambers 111 are provided with the tower body 110, with continued reference to shown in Fig. 3, the bottom of tower body 110 is provided with air inlet 114
With discharging opening 115, the top of tower body 110 is provided with gas outlet 116, inlet 119 and top cover (figure is not marked), the He of gas outlet 116
Inlet 119 may be contained within top cover.Further, multiple spiral chambers 111 are arranged side by side and are uniformly arranged in tower body 110.
When spirally drop filter tower 100 works, top cover is opened, microorganism attachment can be supplied simultaneously by being filled into spiral chamber 111
The filler of growth, the nutrient solution that nutriment is provided for microorganism enter inside tower body 110 from inlet 119, and waste gas is by air inlet
Mouthfuls 114 enter from the bottom of spiral chamber 111, during by spiral chamber 111, the microbiological treatment of the filled middle attachment of waste gas,
Then tower body 110 is discharged from the top of spiral chamber 111 by gas outlet 116.Because spiral chamber 111 is spiral shape, to gas
The discharge of body has certain inhibition, extends waste gas by the time of microbiological treatment so that the needs in waste are gone
The composition removed can be processed more complete.
In addition, spirally inner stuffing is contaminated after the drop long-term work of filter tower 100, treatment effect is caused to decline or disappear,
Therefore need to change filler, now discharge filler by discharging opening 115.
Shown in Figure 3, Fig. 3 is a sectional view of tower body 110 in Fig. 2, is respectively provided with each spiral chamber 111
Nutritious liquid spiral spray pipe 112, refers to Fig. 4, and multiple spray holes 113 are provided with the nutrient solution spiral spray pipe 112.
The effect that nutrient solution spiral spray pipe 112 is set in spiral chamber 111 is that the microorganism into spiral chamber 111 provides growth institute
The nutriment needed, activity and growth can be kept with the microorganism ensured in filler, so as to continue efficiently to waste gas
Handled；And nutrient solution spiral spray pipe 112 is to be able to for spiral shape and the shape of nutrient solution spiral chamber 111 matches
The nutrient solution that closing enables to spray uniformly supplies.
Further, referring again to Fig. 2, in the utility model, the nutrient solution spiral spray pipe in spiral chamber 111
112 quantity is at least 2, and at least two nutrient solution spiral spray pipe 112 is uniformly arranged on the corresponding spiral chamber 111 of tower body 110
Inwall.In the present embodiment, the quantity of nutrient solution spiral spray pipe 112 is that 5,5 nutrient solution spiral spray pipes 112 are uniformly arranged
In on the inwall of the corresponding spiral chamber 111 of tower body 110, it is enable to while nutrient solution is comprehensively sprayed onto the every of filler
At one so that the microorganism in filler effectively can rapidly be obtained to nutriment, to reach optimal activity
And growth conditions.The purpose that multiple nutrient solution spiral spray pipes 112 are respectively provided with each spiral chamber 111 is to ensure that and is distributed in
Microorganism in spiral chamber 111 everywhere can get nutriment, and then improve spiral drop filter tower 100 to waste gas
Treatment effeciency.
It should be noted that in other embodiment of the present utility model, according to actual requirement of engineering, the spray of nutrient solution spiral
Spilling the quantity of pipe 112 can adjust more than 2.Certainly, in other embodiment of the present utility model, the spray of nutrient solution spiral
The quantity for spilling pipe 112 can also be 1, but compared to quantity be more than 2 when, its treatment effect to waste gas is relatively poor.
Further, Fig. 4 is referred to, length direction of multiple spray holes 113 along nutrient solution spiral spray pipe 112 is uniformly set
Put.The purpose of the design is so that nutrient solution while can be equably sprayed onto the everywhere of filler in spiral chamber 111 and be entered
One step ensures that the microorganism in spiral chamber 111 can uniformly and fully get nutriment, to reach preferably useless
Gas disposal effect.
Further, Fig. 2 and Fig. 3 are referred to, the top of tower body 110 is provided with high-pressure spraying device 120, high-pressure spraying device
120 connect with inlet 119.High-pressure spraying device 120 includes multiple shower nozzles 121, and the quantity of shower nozzle 121 and position are and helical cavity
The quantity of room 111 and position are corresponding, the nutrient solution spiral shell in equal and corresponding with the shower nozzle 121 spiral chamber 111 of each shower nozzle 121
Rotation spray line 112 connects.When spirally drop filter tower 100 works, nutrient solution enters in tower body 110 from inlet 119, in high pressure
Sprayed in the presence of spray thrower 120 by the spray hole 113 on nutrient solution spiral spray pipe 112, due to the nutrition sprayed
Liquid has higher hydraulic pressure therefore its region that can be reached in the middle part of filler is further ensured that the thing biology being attached in filler can
Enough nutrients are got so that the treatment effect of waste gas is further strengthened.
When spiral drop filter tower 100, which is stopped, needs discharge filler to clean spiral chamber 111, will fill out first
Material is discharged from spiral chamber 111, and then rinse water is passed into high-pressure spraying device 120 from inlet 119, is passed through after pressurized
Spray hole 113 on nutrient solution spiral spray pipe 112 sprays to be cleaned to spiral chamber 111.
Further, Fig. 2 and Fig. 5 are referred to, is detachably provided with the bottom of the corresponding spiral chamber 111 of tower body 110 anti-
Slip through the net 135, it is to stop the filler being filled in spiral chamber 111 because Action of Gravity Field all slides to set anti-135 purpose of slipping through the net
Locate spiral chamber 111, cause equipment can not Effec-tive Function the problem of.
Further, Fig. 2 and Fig. 3 are referred to, the bottom of tower body 110 is provided with the discharging opening for closing discharging opening 115
Lid 130, discharging opening 115 are arranged at the underface of multiple spiral chambers 111, and the bottom of tower body 110 is provided with for closing discharging
The discharging lid 130 of mouth 115, after discharging lid 130 is opened, then 135 openings of slipping through the net will be prevented, the filler in spiral chamber 111 exists
Directly it can be discharged under Action of Gravity Field by discharging opening 115.Air inlet 114 is arranged in discharging lid 130, due to the lid that discharges
130 are located at the bottommost of tower body 110, can evenly enter each spiral chamber when gas rises and spread from lowest part toward eminence
In 111, therefore air inlet 114 is arranged in discharging lid 130 and enables to waste gas more uniformly to enter in spiral chamber 111.
It should be noted that in other embodiment of the present utility model, air inlet can also be that to be arranged at tower body close
The side-walls of discharging opening, but the design method is not easy diffusion uniformly compared to the design method waste gas of the present embodiment.
Further, referring again to Fig. 3, each spiral chamber 111 is correspondingly arranged on to be entered with what air inlet 114 connected
Tracheae 117, more air inlet pipe 117 are unified to be connected with one end of inlet manifold 118, and inlet manifold 118 is away from air inlet pipe 117
One end connects with air inlet 114, and the bottom of the outlet sides of more air inlet pipe 117 respectively with multiple spiral chambers 111 connects.This sets
The purpose of meter is in order that the waste gas entered from air inlet 114 can enter each helical cavity uniformly across air inlet pipe 117
In room 111, further prevent, gas inlet is uneven.
Further, referring again to Fig. 6, Fig. 6 be VI in Fig. 2 at enlarged drawing, discharging lid 130 edge be provided with
Seal washer 131.The purpose for setting seal washer 131 is to seal tower body 110, prevents discharging lid 130 to be covered on tower body 110
Correspond to phenomenon that is not tight at discharging opening 115 and leaking air.
Further, referring again to Fig. 6, its edge is provided with multiple fasteners 133 in the lid 130 that discharges, gone out
The outer wall of the corresponding tower body 110 of material mouth 115 is provided with multiple fasteners 132, multiple fasteners 133 corresponded with multiple fasteners 132 and
Cooperate, fastener 133 is connected with the mutual cooperation of fastener 132, realizes that discharging lid 130 is detachably arranged at tower body 110
Bottom, it is easy to opening and the closing of discharging opening 115.
Preferably, refer to shown in Fig. 1 and Fig. 2, the spiral filter tower 100 that drips also includes air blower 140, the bottom of tower body 110
Portion is provided with the air intlet 134 connected with multiple spiral chambers 111, and air intlet 134 connects with air blower 140.When logical
When entering the vital movement of the too low microorganism for being difficult to meet to adhere on filler of oxygen content in the waste gas in tower body 110, then open
Air is passed into spiral chamber 111 oxygen provided for microorganism required for vital movement by air blower 140；When being passed through tower body
Oxygen content sufficiently high disclosure satisfy that then is not required to open air blower 140 during microbial life activity in waste gas in 110.
In summary, spirally multiple spiral chamber helical spiral designs help to extend waste gas in spiral chamber in drop filter tower
The interior residence time make it that microorganism is more complete by exhaust-gas treatment；And multiple nutrient solution spiral spray pipes are uniformly arranged on tower body pair
The inwall of spiral chamber is answered to ensure that the microorganism of attachment in filler can get the nutrition being provided from needed for body vital movement；Spray
It is in order to which the microorganism being further ensured that in filler can be got for its life to spill hole and be uniformly arranged along nutrient solution spiral spray pipe
Life activity needed nutrient；The setting of high-pressure spraying device is not only further such that the microorganism in filler everywhere can get
Nutrients, additionally it is possible to so that the cleaning of later stage spiral chamber is more convenient；The setting of air blower to work as oxygen content in waste gas
When relatively low also can in time into tower body supplemental oxygen to meet the vital movement of microorganism；And the spiral drop filter tower structure
It is readily produced in simple industrial.
The utility model additionally provides a kind of exhaust treatment system, and it includes above-mentioned multiple spiral drop filter towers, multiple
Above-mentioned spiral drop filter tower is sequentially connected in series, because the exhaust treatment system has been connected multiple above-mentioned spiral drop filter towers, therefore
It is more thorough that the exhaust treatment system enables to the harmful substance in waste gas treatment process in waste gas to be removed.
Preferred embodiment of the present utility model is the foregoing is only, is not limited to the utility model, for
For those skilled in the art, the utility model can have various modifications and variations.It is all in spirit of the present utility model and former
Within then, any modification, equivalent substitution and improvements made etc., it should be included within the scope of protection of the utility model.
Claims (10)
1. a kind of spiral drop filter tower, it is characterised in that including tower body, multiple spiral chambers are provided with the tower body, each
Nutrient solution spiral spray pipe is provided with helical cavity room, the tube wall of the nutrient solution spiral spray pipe is provided with multiple sprinklings
Hole, the bottom of the tower body are provided with air inlet and discharging opening, gas outlet and inlet are provided with the top of the tower body, each
The top of the spiral chamber connects with the gas outlet, and is connected with the inlet；Each spiral chamber
Bottom connects with the air inlet, and is connected with the discharging opening.
2. spiral drop filter tower according to claim 1, it is characterised in that the nutrition in each helical cavity room
The quantity of liquid spiral spray pipe is at least 2, and nutrient solution spiral spray pipe is uniformly arranged on the tower body and corresponds to institute described at least two
State the inwall of spiral chamber.
3. spiral drop filter tower according to claim 2, it is characterised in that multiple spray holes are along the nutrient solution spiral shell
The length direction of rotation spray line is uniformly arranged.
4. spiral drop filter tower according to claim 1, it is characterised in that be provided with high-pressure spraying at the top of the tower body
Device, the high-pressure spraying device connect with the inlet, and the high-pressure spraying device includes multiple shower nozzles, the quantity of the shower nozzle and
Position is corresponding with the quantity of the spiral chamber and position, each shower nozzle and it is corresponding with the shower nozzle described in
Nutrient solution spiral spray pipe connection in helical cavity room.
5. spiral drop filter tower according to claim 1, it is characterised in that the bottom of the tower body is provided with for closing
The discharging lid of the discharging opening, the air inlet are arranged at the discharging lid.
6. spiral drop filter tower according to claim 5, it is characterised in that the edge of the discharging lid sets sealing gasket
Circle.
7. spiral drop filter tower according to claim 6, it is characterised in that the discharging opening cover outer wall is close to the discharging
Lid edge is provided with multiple fasteners, and the outer wall that the discharging opening corresponds to the tower body is provided with multiple fasteners, multiple described
Fastener is corresponded and cooperated with multiple fasteners.
8. spiral drop filter tower according to claim 1, it is characterised in that each spiral chamber is correspondingly arranged on
The air inlet pipe connected with the air inlet, the outlet sides of the more air inlet pipe connect with the bottom of multiple spiral chambers respectively
It is logical.
9. spiral drop filter tower according to claim 1, it is characterised in that also including air blower, the bottom of the tower body
The air intlet connected with multiple spiral chambers is additionally provided with, the air blower connects with the air intlet.
10. a kind of exhaust treatment system, it is characterised in that including multiple spiral drops as described in claim any one of 1-9
Filter tower, multiple spiral drop filter towers are sequentially connected in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720147504.5U CN206837850U (en) | 2017-02-17 | 2017-02-17 | A kind of spiral drop filter tower and exhaust treatment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720147504.5U CN206837850U (en) | 2017-02-17 | 2017-02-17 | A kind of spiral drop filter tower and exhaust treatment system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206837850U true CN206837850U (en) | 2018-01-05 |
Family
ID=60790832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720147504.5U Expired - Fee Related CN206837850U (en) | 2017-02-17 | 2017-02-17 | A kind of spiral drop filter tower and exhaust treatment system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206837850U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106861418A (en) * | 2017-02-17 | 2017-06-20 | 盐城工学院 | A kind of spiral drop filter tower and exhaust treatment system |
-
2017
- 2017-02-17 CN CN201720147504.5U patent/CN206837850U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106861418A (en) * | 2017-02-17 | 2017-06-20 | 盐城工学院 | A kind of spiral drop filter tower and exhaust treatment system |
| CN106861418B (en) * | 2017-02-17 | 2022-06-03 | 盐城工学院 | Spiral trickling filtration tower and exhaust treatment system |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180105 Termination date: 20200217 |
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| CF01 | Termination of patent right due to non-payment of annual fee |