CN107261572A - A kind of sewage bidirectional high-efficiency purifying processing device - Google Patents
A kind of sewage bidirectional high-efficiency purifying processing device Download PDFInfo
- Publication number
- CN107261572A CN107261572A CN201710633412.2A CN201710633412A CN107261572A CN 107261572 A CN107261572 A CN 107261572A CN 201710633412 A CN201710633412 A CN 201710633412A CN 107261572 A CN107261572 A CN 107261572A
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- Prior art keywords
- sewage
- separator box
- plate
- water tank
- processing device
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/0039—Settling tanks provided with contact surfaces, e.g. baffles, particles
- B01D21/0048—Plurality of plates inclined in alternating directions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/02—Settling tanks with single outlets for the separated liquid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/24—Feed or discharge mechanisms for settling tanks
- B01D21/2405—Feed mechanisms for settling tanks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/24—Feed or discharge mechanisms for settling tanks
- B01D21/2444—Discharge mechanisms for the classified liquid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/24—Feed or discharge mechanisms for settling tanks
- B01D21/245—Discharge mechanisms for the sediments
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treatment Of Sludge (AREA)
Abstract
The present invention relates to a kind of sewage bidirectional high-efficiency purifying processing device, when aiming to solve the problem that sewage carries out mud-water separation in sewage disposal process, the problem of sludge easy accumulated plugging, including inlet water tank, separator box and two-way separation assembly, by setting separator box under inlet water tank, spacer mechanism in separator box is W-shaped, and the flow-stopping plate that both sides are set for rotation, sewage is completed after mud-water separation, flow-stopping plate is promoted to be swung by the pushing mechanism set below flow-stopping plate, the lower section of sediment space is set to open outlet, sludge is automatically drained out, solve the technical problem that sewage carries out sludge easy accumulated plugging during mud-water separation, and it is simple in construction, floor space is small, energy consumption is low.
Description
Technical field
The present invention relates to sewage treatment area, specially a kind of sewage bidirectional high-efficiency purifying processing device.
Background technology
At present, the mud-water separation mode employed in sewage disposal process mainly has two kinds, and one kind is to utilize belt press filtration
The devices such as machine, plate and frame filter press, centrifugal dehydrator are implemented dehydration, sludge to sewage and suppressed；Another is to utilize flotation tank, precipitation
The devices such as pond, filter are tentatively efficiently separated muddy water.With the development of science and technology, it have also appeared bag type filtering
The various equipment worked well such as device, medium filter.
But, the sewage-treatment plant for being currently used for mud-water separation all has the slow defect of processing speed, and all adopts
Water body is filtered, it is necessary to regularly replace filler with filler, and operating cost is higher, safeguards also very inconvenient.
A kind of quick device for separating mud and water, including knockout drum are disclosed in Patent No. CN204582744U patent,
Driving structure, swivelling cover and filter basket are provided with knockout drum, drainage pipeline and water inlet pipe are additionally provided with knockout drum.Though
The problem of so solving big floor space in the prior art, poor efficiency using this art solutions, but in the process of running
Easily there is sludge blockage, it is necessary to periodically be cleaned, increase cost, and high energy consumption, it is complicated.
The content of the invention
For problem above, the invention provides a kind of sewage bidirectional high-efficiency purifying processing device, by under inlet water tank
Set the spacer mechanism in separator box, separator box W-shaped, and both sides is rotate the flow-stopping plate set, sewage completes mud-water separation
Afterwards, promote flow-stopping plate to be swung by the pushing mechanism set below flow-stopping plate, make to open outlet, sludge below sediment space
It is automatically drained out, solves sludge in background technology and hold susceptible to plugging technical problem, and floor space is small, energy consumption is low.
To achieve the above object, the present invention provides following technical scheme：
A kind of sewage bidirectional high-efficiency purifying processing device, including：Inlet water tank, the upper end of the inlet water tank is fixedly installed branch
Support；
Also include separator box, the separator box is fixedly installed on the lower section of the inlet water tank；
And two-way separation assembly, the two-way separation assembly is arranged at the inside of the separator box, and it includes partition machine
Structure and the pushing mechanism being connected with the spacer mechanism.
As an improvement, the inlet water tank is arranged on the separator box by support frame as described above, including：Water inlet pipe, it is described
Water inlet pipe is fixedly installed on the upper end of the inlet water tank vertically；
Also include intake pump, the intake pump is arranged on the water inlet pipe, and it is arranged at the top of the inlet water tank；With
And some deflectors, staggeredly ladder is arranged at the inside of the inlet water tank to the deflector from top to bottom.
As an improvement, one end of the deflector is fixedly installed on the inwall of the inlet water tank, its other end is not touched
And the inlet water tank inwall and tilt down setting.
As an improvement, the separator box includes：Splicing plate, the splicing plate is symmetricly set in the bottom in the separator box,
Its first half is arc structure, and its lower half is vertical structure；
Also include vertical chute, the lower half of the vertical chute and the splicing plate is correspondingly arranged；
And riser, length direction of the riser along the separator box respectively fixed symmetrical be arranged at the splicing plate with
Between the inwall of the separator box, its top is provided with head rod.
As an improvement, the lower half of the splicing plate is slideably positioned in the vertical chute.
As an improvement, forming storage mud space between the splicing plate, the inwall formation of the riser and the separator box is stored up
Hydrospace.
As an improvement, the spacer mechanism includes：Flow distribution plate, the flow distribution plate is inverted V-shaped structure, and it is along the separator box
Length direction be fixedly installed in the separator box, and it is arranged between the delivery port of the inlet water tank and the splicing plate；
And flow-stopping plate, the flow-stopping plate rotation-symmetric is arranged at the both sides of the flow distribution plate, and it is in W with the flow distribution plate
Shape structure, and its two ends is fixedly installed the second connecting rod.
As an improvement, the outer wall formation sediment space of the inwall of the flow-stopping plate and the flow distribution plate.
As an improvement, the pushing mechanism includes：Some connectors, the equal level of connector is fixedly installed on described connect
Between flitch；
Also include some support bars, the support bar is fixedly installed on the two ends of the splicing plate, its other end and institute
The second connecting rod stated on flow-stopping plate is hinged；
And cylinder, the cylinder is arranged at the outside of the separator box, connecting plate is fixedly installed on its push rod.
As an improvement, the connector is fixedly connected with the connecting plate.
The beneficial effects of the present invention are：
(1) flow distribution plate of the invention by setting inverted V-shaped structure under the delivery port of inlet water tank, and in the both sides of flow distribution plate
Rotate and flow-stopping plate is set, sewage enters the fashionable sediment space formed between flow-stopping plate and flow distribution plate and precipitated, clear water is from gear
Flow the upper of plate to complete after mud-water separation along overflowing, drive splicing plate to push up flow-stopping plate by pushing mechanism, turn flow-stopping plate
Dynamic, opening is formed on sediment space bottom, and sludge is discharged, blocking will not be formed；
(2) present invention sets deflector by the ladder that interlocks in inlet water tank, and deflector tilts down setting so that dirty
When water is by starting intake pump into inlet water tank, sewage residence time is longer, serves cushioning effect, and make the dirt in sewage
Mud preliminary sedimentation, mud-water separation effect of the lifting sewage in separator box；
(3) sediment space that the present invention passes through two-way setting so that sewage enters after separator box, is split into two parts progress
Mud-water separation, is divided into two parts precipitation by the sludge in sewage, prevents that sludge quantity is excessive and blocks, and sink simultaneously in both sides
Shallow lake mud-water separation effect is more preferable.
In summary, the present invention, which has, can remove solid impurity, can realize mud-water separation, simple in construction, and saving cost,
Be particularly suitable for use in sewage treatment area.
Brief description of the drawings
Fig. 1 is cross section structure diagram of the invention；
Fig. 2 is dimensional structure diagram of the invention；
Fig. 3 is the cross section structure diagram of inlet water tank of the present invention；
Fig. 4 is the positive structure diagram of separator box of the present invention；
Fig. 5 is working state schematic representation of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer ", " up time
The orientation or position relationship of the instruction such as pin ", " counterclockwise " are, based on orientation shown in the drawings or position relationship, to be for only for ease of
The description present invention and simplified description, rather than indicate or imply that the equipment or element of meaning must have specific orientation, Yi Te
Fixed azimuth configuration and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or implying relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or
Implicitly include one or more this feature.In the description of the invention, " multiple " are meant that two or more,
Unless otherwise specifically defined.
Embodiment
As shown in Figures 1 and 2, a kind of sewage bidirectional high-efficiency purifying processing device, including：
Inlet water tank 1, the upper end of the inlet water tank 1 is fixedly installed support frame 11；
Separator box 2, the separator box 2 is fixedly installed on the lower section of the inlet water tank 1；
And two-way separation assembly 3, the two-way separation assembly 3 is arranged at the inside of the separator box 2, and it includes dividing plate
Mechanism 31 and the pushing mechanism 32 being connected with the spacer mechanism 31.
It should be noted that in the present embodiment, sewage enters after separator box 2 carries out bidirectional shunt simultaneously by spacer mechanism 31
Precipitation separation, then promote spacer mechanism 31 to discharge sludge by pushing mechanism 32, the support frame 11 on inlet water tank 1 preferably by
Welding manner achieves a fixed connection with inlet water tank 1.
It should be further stated that, in the present embodiment, inlet water tank 1 is preferably halfpace structure, and upper surface area is more than
Lower surface, its length direction of delivery port 15 along the inlet water tank 1 is opened in lower end, and the top of separator box 2 is corresponding with delivery port 15
Offer opening.
As shown in Figures 1 and 3, as a preferred embodiment, the inlet water tank 1 is set by support frame as described above 11
In the top of the separator box 2, including：Water inlet pipe 12, the water inlet pipe 12 is fixedly installed on the upper of the inlet water tank 1 vertically
End；
Also include intake pump 13, the intake pump 13 is arranged on the water inlet pipe 12, and it is arranged at the inlet water tank 1
Top；
And some deflectors 14, length direction of the deflector 14 along the inlet water tank 1 from top to bottom interlock ladder
It is arranged at the inside of the inlet water tank 1.
Wherein, one end of the deflector 14 is fixedly installed on the inwall of the inlet water tank 1, and its other end is not touched
The inwall of the inlet water tank 1 and tilt down setting.
It should be noted that in the present embodiment, water inlet pipe 12 is preferably to be opened at the upper end center of water tank 1, intake pump
13 offer power, which introduce sewage, to be passed through in inlet water tank 1.
It should be further stated that, after sewage enters in inlet water tank 1, the water inlet complemented each other to form by deflector 14
Passage flows to separator box 2, when entering intake tunnel, and sewage residence time in inlet water tank 1 is longer, serves cushioning effect,
And sewage sludge during flowing is obtained preliminary sedimentation, mud-water separation effect of the lifting sewage in separator box.
As shown in Figures 1 and 3, one kind is done preferred embodiment, the separator box 2 includes：Splicing plate 21, the splicing
Plate 21 is symmetricly set in the bottom in the separator box 2, and its first half 211 is arc structure, and its lower half 212 is vertical structure；
Also include vertical chute 22, the lower half 212 of the vertical chute 22 and the splicing plate 21 is correspondingly arranged；
And riser 23, fixed symmetrical is arranged at described connect to length direction of the riser 23 along the separator box 2 respectively
Between the inwall of flitch 21 and the separator box 2, its top is provided with head rod 231.
Wherein, the lower half 212 of the splicing plate 21 is slideably positioned in the vertical chute 22.
It should be noted that the first half 211 of the splicing plate 21 is preferably arcuate structure, it guides work to sludge
With sludge falls to splicing plate 21 after the discharge of sediment space 3111, and slides to storage mud sky by the first half 211 of arcuate structure
Between 24.
Form storage mud space 24 as shown in figure 4, further, between the splicing plate 21, the riser 23 with described point
From the inwall formation water space 25 of case 2.
It should be noted that in the present embodiment, by the internal structure feature of separator box 2, internally forming storage mud respectively
Space 24 and water space 25, and water space 25 corresponds respectively to two-way separation assembly 3 and sets, subsequently through in same pipeline
Complete cocurrent.
It should be further stated that, in the present embodiment, water space 25 offers water outlet in the bottom of rear wall and led to
Sludge in mouth 251, storage mud space 24 opens up sludge port by front side and discharged.
As shown in Figures 1 and 3, as a preferred embodiment, the spacer mechanism 31 includes：
Flow distribution plate 311, the flow distribution plate 311 is inverted V-shaped structure, and its length direction along the separator box 2 is fixedly installed
In in the separator box 2, and it is arranged between the delivery port 15 of the inlet water tank 1 and the splicing plate 21；
And flow-stopping plate 312, the rotation-symmetric of flow-stopping plate 312 is arranged at the both sides of the flow distribution plate 311, its with it is described
The W-shaped structure of flow distribution plate 311, and its two ends is fixedly installed the second connecting rod 3121.
Wherein, the outer wall formation sediment space 3111 of the inwall of the flow-stopping plate 312 and the flow distribution plate 311.
It should be noted that in the present embodiment, flow distribution plate 311 is preferably that two ends pass through in welding manner and separator box 2
Wall is fixedly connected, and in the top alignment delivery port 15 of flow distribution plate 311, sewage is after delivery port outflow, to the both sides of flow distribution plate 311
Shunting, now the bottom of flow-stopping plate 312 and the bottom of flow distribution plate 311 close up, and form sediment space 3111, sewage is in sediment space
Sludge settling is carried out in 3111.
It should be further stated that, in the present embodiment, the height of portrait 23 is less than the maximum height of flow-stopping plate 312, high
In the minimum altitude of flow-stopping plate 312, when sludge quantity increases in sediment space 3111, flow-stopping plate 312 is tilted, now 23 pairs of portrait
Flow-stopping plate 312 is played a supporting role, and prevents flow-stopping plate 312 from toppling over completely, influence mud-water separation work.
As shown in Figures 1 and 3, as a preferred embodiment, the pushing mechanism 32 includes：
Some connectors 321, the equal level of the connector 321 is fixedly installed between the splicing plate 21；
Some support bars 322, the support bar 322 is fixedly installed on the two ends of the splicing plate 21, its other end with
The second connecting rod 3121 on the flow-stopping plate 312 is hinged；
Cylinder 323, the cylinder 323 is arranged on the outside of the separator box 2, its push rod and is fixedly installed connecting plate
3231。
Wherein, the connector 321 is fixedly connected with the connecting plate 3231.
It should be noted that in the present embodiment, support member 322 is both preferably by welding manner and first in portrait 23
Connecting rod 231 is fixedly connected, and support member 322 is towards the center inward slant certain angle of separator box 2, is conducive to gear
Stream plate 312 plays more preferable supporting role.
It should be further stated that, in the present embodiment, worked by cylinder 323, coordinate support member 322 and connecting plate
3231 respective annexations, cylinder push-rod drives splicing plate 21 to be slided up and down in vertical chute 22, during upward sliding, splicing
Plate 21 contradicts flow-stopping plate 312 and promotes flow-stopping plate 312 to swing, and the lower end of sediment space 3111 is opened up place's sludge outlet, by dirt
Mud is discharged out of sediment space 3111, and will not be blocked.
The course of work is as follows：
Intake pump 13 starts, and sewage enters from water inlet pipe 12, and sewage after inlet water tank 1 from flow distribution plate 311 to both sides by being divided
Stream, and precipitated in sediment space 3111, clear water edge from flow-stopping plate 312 overflows into water space 25, the band of pushing component 32
Dynamic splicing plate 21 is moved up, and the upper end of splicing plate 21, which contradicts flow-stopping plate 312 and promoted, to be allowed to swing, the bottom of sediment space 3111
Portion opens opening, and sludge is discharged into storage mud space 24.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
Any modifications, equivalent substitutions and improvements made within refreshing and principle etc., should be included in the scope of the protection.
Claims (10)
1. a kind of sewage bidirectional high-efficiency purifying processing device, it is characterised in that including：
Inlet water tank (1), the external stability of the inlet water tank (1) is connected with support frame (11)；
Separator box (2), the separator box (2) is fixedly installed on the lower section of the inlet water tank (1)；
Two-way separation assembly (3), the two-way separation assembly (3) is arranged at the inside of the separator box (2), and it includes partition machine
Structure (31) and the pushing mechanism (32) being connected with the spacer mechanism (31).
2. a kind of sewage bidirectional high-efficiency purifying processing device according to claim 1, it is characterised in that the inlet water tank
(1) top of the separator box (2) is arranged at by support frame as described above (11), including：
Water inlet pipe (12), the water inlet pipe (12) is fixedly installed on the upper end of the inlet water tank (1) vertically；
Intake pump (13), the intake pump (13) is arranged on the water inlet pipe (12), and it is arranged at the upper of the inlet water tank (1)
Side；
Some deflectors (14), staggeredly ladder is set length direction of the deflector (14) along the inlet water tank (1) from top to bottom
It is placed in the inside of the inlet water tank (1).
3. a kind of sewage bidirectional high-efficiency purifying processing device according to claim 2, it is characterised in that the deflector
(14) one end is fixedly installed on the inwall of the inlet water tank (1), and its other end tilts down setting.
4. a kind of sewage bidirectional high-efficiency purifying processing device according to claim 1, it is characterised in that the separator box
(2) include：
Splicing plate (21), the splicing plate (21) is symmetricly set in the bottom in the separator box (2), and its first half (211) is circle
Arc structure, its lower half (212) is vertical structure；
Vertical chute (22), the lower half (212) of the vertical chute (22) and the splicing plate (21) is correspondingly arranged；
Riser (23), fixed symmetrical is arranged at the splicing to length direction of the riser (23) along the separator box (2) respectively
Between the inwall of plate (21) and the separator box (2), its top is provided with head rod (231).
5. a kind of sewage bidirectional high-efficiency purifying processing device according to claim 4, it is characterised in that the splicing plate
(21) lower half (212) is slideably positioned in the vertical chute (22).
6. a kind of sewage bidirectional high-efficiency purifying processing device according to claim 4, it is characterised in that the splicing plate
(21) storage mud space (24), the riser (23) and the inwall formation water space (25) of the separator box (2) are formed between.
7. a kind of sewage bidirectional high-efficiency purifying processing device according to claim 4, it is characterised in that the spacer mechanism
(31) include：
Flow distribution plate (311), the flow distribution plate (311) is inverted V-shaped structure, and its length direction along the separator box (2) is fixed and set
It is placed in the separator box (2), and it is arranged between the delivery port of the inlet water tank (1) (15) and the splicing plate (21)；
Flow-stopping plate (312), flow-stopping plate (312) rotation-symmetric is arranged at the both sides of the flow distribution plate (311), its with described point
Plate (311) W-shaped structure is flowed, and its two ends is fixedly installed the second connecting rod (3121).
8. a kind of sewage bidirectional high-efficiency purifying processing device according to claim 7, it is characterised in that the flow-stopping plate
(312) the outer wall formation sediment space (3111) of inwall and the flow distribution plate (311).
9. a kind of sewage bidirectional high-efficiency purifying processing device according to claim 7, it is characterised in that the pushing mechanism
(32) include：
Some connectors (321), the connector (321) level is fixedly installed between the splicing plate (21)；
Some support bars (322), the support bar (322) is fixedly installed on the two ends of the splicing plate (21), its other end
It is hinged with the second connecting rod (3121) on the flow-stopping plate (312)；
Cylinder (323), the cylinder (323) is arranged on the outside of the separator box (2), its push rod and is fixedly installed connecting plate
(3231)。
10. a kind of sewage bidirectional high-efficiency purifying processing device according to claim 9, it is characterised in that the connector
(321) it is fixedly connected with the connecting plate (3231).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710633412.2A CN107261572A (en) | 2017-07-28 | 2017-07-28 | A kind of sewage bidirectional high-efficiency purifying processing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710633412.2A CN107261572A (en) | 2017-07-28 | 2017-07-28 | A kind of sewage bidirectional high-efficiency purifying processing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107261572A true CN107261572A (en) | 2017-10-20 |
Family
ID=60074422
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710633412.2A Withdrawn CN107261572A (en) | 2017-07-28 | 2017-07-28 | A kind of sewage bidirectional high-efficiency purifying processing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107261572A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108854173A (en) * | 2018-06-27 | 2018-11-23 | 李海强 | Flat turbulent flow alternative expression setting pot |
| CN111905414A (en) * | 2020-07-27 | 2020-11-10 | 铜陵铜冠神虹化工有限责任公司 | Sodium sulfide production sedimentation system |
| CN113457224A (en) * | 2021-07-22 | 2021-10-01 | 清研环境科技股份有限公司 | Sediment separator |
-
2017
- 2017-07-28 CN CN201710633412.2A patent/CN107261572A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108854173A (en) * | 2018-06-27 | 2018-11-23 | 李海强 | Flat turbulent flow alternative expression setting pot |
| CN108854173B (en) * | 2018-06-27 | 2020-10-16 | 钟静涛 | Flat turbulent flow alternative type grit chamber |
| CN111905414A (en) * | 2020-07-27 | 2020-11-10 | 铜陵铜冠神虹化工有限责任公司 | Sodium sulfide production sedimentation system |
| CN111905414B (en) * | 2020-07-27 | 2022-02-25 | 铜陵铜冠神虹化工有限责任公司 | Sodium sulfide production sedimentation system |
| CN113457224A (en) * | 2021-07-22 | 2021-10-01 | 清研环境科技股份有限公司 | Sediment separator |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20171020 |
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| WW01 | Invention patent application withdrawn after publication |