CN107814425A - Sewage pressure floatation air device - Google Patents

Sewage pressure floatation air device Download PDF

Info

Publication number
CN107814425A
CN107814425A CN201711042396.6A CN201711042396A CN107814425A CN 107814425 A CN107814425 A CN 107814425A CN 201711042396 A CN201711042396 A CN 201711042396A CN 107814425 A CN107814425 A CN 107814425A
Authority
CN
China
Prior art keywords
air
forced feed
pressurized canister
tank
sewage
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.)
Withdrawn
Application number
CN201711042396.6A
Other languages
Chinese (zh)
Inventor
卢梅雅
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CN201711042396.6A priority Critical patent/CN107814425A/en
Publication of CN107814425A publication Critical patent/CN107814425A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/24—Treatment of water, waste water, or sewage by flotation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Analytical Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Physical Water Treatments (AREA)

Abstract

The invention provides a kind of sewage pressure floatation air device, belong to technical field of sewage.It includes flotation tank mechanism and pressurizer mechanism, described pressurizer mechanism includes pressurized canister, forced feed tank is arranged with outside pressurized canister, described pressurized canister is fixedly connected with forced feed tank, the forced feed pipe of forced feed tank is communicated with pressurized canister, air inlet pipe is provided with pressurized canister, several exhaust disks are connected with air inlet pipe, described exhaust disk inside pressurized canister with connecting, described air inlet pipe connection compressed air generator, described flotation tank mechanism includes flotation tank, and it is centered around the air flotation slot of flotation tank top edge, air supporting trench bottom is connected with discharge nozzle.The present invention can realize separation of solid and liquid and water-oil separating simultaneously.

Description

Sewage pressure floatation air device
Technical field
The invention belongs to technical field of sewage, is related to a kind of sewage pressure floatation air device.
Background technology
Oil slick and solid particulate matter are usually contained in sewage, existing purification method is typically settled process, i.e., using precipitation Pond is precipitated, sedimentation basin be using precipitation go water removal in suspension a kind of structures, the equipment to purify water.Utilize The natural sedimentation of water or acting on to remove the suspension in water for coagulating sedimentation.Sedimentation basin is divided into horizontal sedimentation basin by water (flow) direction With vertical sedimentation basin.Sedimentation effect is decided by the residence time of the flow velocity and water of sedimentation basin reclaimed water in pond.In order to improve precipitation Effect, land area is reduced, it is more using the incorgruous sedimentation tank of honeycomb inclined-tube, accelerating purifying pool, plusator etc. at present.Precipitation Pond is widely used in the treatment of waste water.
But sedimentation basin can only solve the problems, such as separation of solid and liquid, for oil slick, prior art is realized using Bubble-floating Method, but is such as existed Air supporting is carried out in settling tank, water body can be stirred, then can not realize the effect of sedimentation.Therefore flotation tank and settling tank are divided equally Independence is opened, due to set multiple ponds, therefore floor space is relatively large.
Such as Chinese patent literature discloses a kind of sedimentation basin [application number：201510450441.6], it includes sedimentation basin Body, bottom face is provided with activated carbon adsorption layer in the sedimentation basin body, will be precipitated by dividing plate in the sedimentation basin body Pond is divided into settling zone and clean water area, and the middle and upper part of the dividing plate is provided with gap, and the both sides of the sedimentation basin body are respectively equipped with Water inlet pipe and outlet pipe, the water inlet pipe are located in settling zone, and the outlet pipe is located in clean water area, are set below the water inlet pipe There is the deflector being obliquely installed, the surface of the deflector is provided with ultraviolet sterilizer.Such scheme can only just realize sedimentation Effect, the effect of water-oil separating can not be realized.
The content of the invention
A kind of regarding the issue above, the present invention provides sewage pressure floatation air device.
To reach above-mentioned purpose, present invention employs following technical proposal：
A kind of sewage pressure floatation air device, including flotation tank mechanism and pressurizer mechanism,
Described pressurizer mechanism includes pressurized canister, forced feed tank is arranged with outside pressurized canister, described pressurized canister is with adding It is pressed into batch can be fixedly connected, the forced feed pipe of forced feed tank is communicated with pressurized canister, air inlet pipe is provided with pressurized canister, Several exhaust disks are connected with air inlet pipe, described exhaust disk inside pressurized canister with connecting, the connection compression of described air inlet pipe Air generator,
Described flotation tank mechanism includes flotation tank, and is centered around the air flotation slot of flotation tank top edge, air flotation slot bottom Portion is connected with discharge nozzle.
In above-mentioned sewage pressure floatation air device, axially spaced-apart of some exhaust disks along air inlet pipe is uniformly set, and Venthole is densely covered with exhaust disk, compressed air generator is compressed air cylinder or air compressor.
In above-mentioned sewage pressure floatation air device, the bottom bore of described pressurized canister is gradually reduced to form the first pressurization Settling zone, the first pressurized precipitation area bottom is connected with the first pressurised exhaust pipe and the first pressurised exhaust pipe extends forced feed Outside tank.
In above-mentioned sewage pressure floatation air device, described forced feed pot bottom bore be gradually reduced to be formed second plus Press settling zone, the second pressurized precipitation area bottom is connected with the second pressurised exhaust pipe and the second pressurised exhaust pipe extend pressurize into Outside batch can.
In the above-mentioned sewage pressure floatation air device, one is fixed with the inwall of described pressurized canister and is inclined to set First spiral board, the first spiral board are located at the outer of the spiral board of outlet face first of the top of forced feed pipe and forced feed pipe Wall.
In above-mentioned sewage pressure floatation air device, the inwall of described forced feed tank is fixed with one and is inclined to set The second spiral board, forced feed mouth is additionally provided with forced feed tank, the second spiral board is located above forced feed mouth and pressurizeed The spiral board of charging aperture face second.
In above-mentioned sewage pressure floatation air device, the first described spiral board and the second spiral board are in inverted round stage taper.
In above-mentioned sewage pressure floatation air device, described flotation tank includes release pond and run-off, release pond pipe At the top of road connection pressurized canister, the bottom of release pond connects with run-off, and the height of described run-off is less than air flotation slot.
In above-mentioned sewage pressure floatation air device, described release pond bottom is provided with air supporting plate, on described air supporting plate It is densely covered with aperture, the junction of release pond and pressurized canister is located above air supporting plate, and air supporting link slot, institute are provided with below air supporting plate The air supporting link slot connection release pond and run-off stated.
In above-mentioned sewage pressure floatation air device, described release pond and run-off are respectively equipped with low spot drain valve, Air flotation slot is provided with overflow valve, described overflow valve connection oil slick pond, and air supporting trench bottom is provided with control valve.
Compared with prior art, the advantage of the invention is that：
In pressurized with compressed air mixed process, separation of solid and liquid can be realized to sewage, make solid particle from pressurized canister and Forced feed pot bottom is discharged, and compressed air is well mixed with sewage by being vented disk, before being created well for next step oil extraction Put condition.
In release pond, because gas mixing is uniform, therefore release process is also uniform, oil slick is fully divided with sewage From realizing water-oil separating, reduce the COD value in sewage, then after the top overflow by release pond and run-off, oil slick is received Collection, is sufficiently separated with sewage.
The present invention can realize separation of solid and liquid, and and can realizes water-oil separating, can reduce the COD value in sewage, can also improve The clarity of sewage.
Further advantage, target and the feature of the present invention embodies part by following explanation, and part will also be by this The research and practice of invention and be understood by the person skilled in the art.
Brief description of the drawings
Fig. 1 is the structural representation of invention.
Fig. 2 is the internal structure schematic diagram of air inlet pipe connection exhaust disk.
Fig. 3 is the schematic perspective view of air inlet pipe connection exhaust disk.
In figure, flotation tank mechanism 301, pressurizer mechanism 302, pressurized canister 303, forced feed tank 304, forced feed pipe 305th, air inlet pipe 306, exhaust disk 307, compressed air generator 308, flotation tank 309, air flotation slot 310, venthole 311, first Pressurized precipitation area 312, the first pressurised exhaust pipe 313, the second pressurized precipitation area 314, the second pressurised exhaust pipe 315, the first eddy flow Plate 316, the second spiral board 317, forced feed mouth 318, release pond 319, run-off 320, air supporting plate 321, air supporting link slot 322nd, low spot drain valve 323, overflow valve 324, oil slick pond 325, control valve 326.
Embodiment
As shown in figure 1, a kind of sewage pressure floatation air device, including flotation tank mechanism 301 and pressurizer mechanism 302, it is described Pressurizer mechanism 302 include pressurized canister 303, be arranged with forced feed tank 304 outside pressurized canister 303, described pressurized canister 303 with Forced feed tank 304 is fixedly connected, and the forced feed pipe 305 of forced feed tank 304, pressurized canister are communicated with pressurized canister 303 Air inlet pipe 306 is provided with 303, several exhaust disks 307, described exhaust disk 307 and pressurized canister are connected with air inlet pipe 306 303 inside connect, described air inlet pipe 306 connection compressed air generator 308,
Described flotation tank mechanism 301 includes flotation tank 309, and is centered around the air flotation slot of the top edge of flotation tank 309 310, the bottom of air flotation slot 310 is connected with discharge nozzle.
Sewage, which is introduced into, is pressed into batch can 304, and pressurization can be played using pump, and the pressure of sewage is normally controlled in 0.3-0.8MPa. Afterwards, sewage is entered in pressurized canister 303 by feed pipe 305, and air enters from air inlet pipe 306, and dirt is drained into by exhaust disk 307 In water, mixed with sewage.
With reference to shown in Fig. 2 and Fig. 3, axially spaced-apart of some exhaust disks 307 along air inlet pipe 306 is uniformly set, and is vented Venthole 311 is densely covered with disk 307.Air inlet pipe 306 connects with exhaust disk 307, from venthole after air entrance exhaust disk 307 311 overflow, and uniformly enter in the sewage inside pressurized canister 303.Preferred scheme, it is vented the upper and lower surface and side of disk 307 Venthole 311 is offered on wall, gas is entered in sewage from all directions, dispersed, is compressed under pressure In sewage.Compressed air generator 308 is compressed air cylinder or air compressor, and compressed air enters from exhaust disk 307, compressed The pressure of air is normally controlled in 0.3-0.6MPa.
The bottom bore of described pressurized canister 303 is gradually reduced to form the first pressurized precipitation area 312, described forced feed The bottom bore of tank 304, which is gradually reduced, to be formed the bottom of 314 first pressurized precipitation area of the second pressurized precipitation area 312 and is connected with the first pressurization Delivery pipe 313 and the first pressurised exhaust pipe 313 extends outside forced feed tank 304, the bottom of the second pressurized precipitation area 314 connect It is connected to the second pressurised exhaust pipe 315 and the second pressurised exhaust pipe 315 extends outside forced feed tank 304.
Particulate matter is had in sewage, under pressure floatation air effect, particulate matter can accelerate to sink, heavy in pressurized canister Starch is gradually deposited in the first pressurized precipitation area 312, and the first pressurised exhaust pipe 313 is opened in timing can be outside drain tank, forced feed Sediment in tank 304 is precipitated in charging, is gradually deposited to the second pressurized precipitation area 314, and the second pressurization is opened in timing Delivery pipe 315 can be outside drain tank.
It will be appreciated by those skilled in the art that the first pressurised exhaust pipe 313 and the second pressurised exhaust pipe 315 are respectively connected with valve Door.
First spiral board 316 being inclined to set, the first spiral board are fixed with the inwall of described pressurized canister 303 316 positioned at the top of forced feed pipe 305 and the outer wall of the first spiral board of outlet face 316 of forced feed pipe 305.
The inwall of described forced feed tank 304 is fixed with second spiral board 317 being inclined to set, forced feed Forced feed mouth 318 is additionally provided with tank 304, the second spiral board 317 is located at the top of forced feed mouth 318 and forced feed mouth 318 The second spiral board of face 317.
The first described spiral board 316 and the second spiral board 317 are in inverted round stage taper.The first spiral board of flow impact 316 Flowed downward with the second spiral board 317, produce vortex, the sedimentation of accelerating solid particulate matter.Improve the cleaning efficiency of water body.
Preferred scheme, the first spiral board 316 and the second spiral board 317 are in the helical form being rotated down, water impact first Vortex is formed after the spiral board 317 of spiral board 316 and second, the sedimentation of accelerating solid particulate matter, cleans water body.
Floating pond 309 includes release pond 319 and run-off 320, and run-off 320 can have multiple, and release pond 319 is connected with pipeline The top of pressurized canister 303 is connect, the bottom of release pond 319 connects with run-off 320, and the height of described run-off 320 is less than air supporting Groove 310.
The sewage of release pond 319 is flowed into run-off 320 by bottom, as run-off 320 has multiple, can also use bottom The method of connection is sequentially communicated, when run-off has it is multiple when, multistage overflow can be formed, be easy to the collection of oil slick.
The sewage that there is compressed air inside is entered in release pond 319 after being come out from pressurized canister, and gas discharges at ambient pressure Become minute bubbles one by one, the oil slick in sewage is taken on the water surface, on the one hand slick can be flowed into run-off In 320, on the other hand it can also be fed directly in air flotation slot 310, oil slick collects recovery, gas-liquid separation device 310 in air flotation slot 310 Bottom connects sewage with pipeline, and oil slick is taken away from gas-liquid separation device 310.
The described bottom of release pond 319 is provided with air supporting plate 321, and aperture, release pond are densely covered with described air supporting plate 321 319 be located above air supporting plate 321 with the junction of pressurized canister 303, that is, the junction of pipeline and flotation tank is located on air supporting plate Side, gas degassing kickboard top are released, and air supporting link slot 322 are provided with below air supporting plate 321, air supporting link slot 322 can To be strip or poroid, for sewage to be connected into flotation tank, the described air supporting link slot 322 connection He of release pond 319 Run-off 320.
The effect of air supporting plate is to reduce the flow velocity of current, uniformly settles solid particle, and make gas on air supporting plate Side is fully discharged, and oil slick is sufficiently separated.
Described release pond 319 and run-off 320 is respectively equipped with low spot drain valve 323, and low spot drain valve 323 is used to arrange Dirt, is provided with overflow valve 324 on air flotation slot 310, and overflow valve 324 is used to discharge oil slick, described overflow valve 324 connection oil slick pond 325, the bottom of air flotation slot 310 is provided with control valve 326, and control valve 326 is used to discharge the sewage separated with oil slick, the width of valve regulated Degree belongs to common knowledge, and here is omitted.
It will be appreciated by those skilled in the art that what is flowed out at the pipeline that control valve 326 connects is sewage rather than oil slick, float Oil is to be flowed into oil slick pond 325 to be collected by overflow valve, is separated in next step to do.
The operation principle of the present embodiment is：
Sewage water pump is pumped into from forced feed mouth 318, in forced feed tank 304 after rotational flow settlement, by pressurizeing Feed pipe 305 is entered in pressurized canister 303, and compressed air caused by compressed air generator 308 is by the row of entering of air inlet pipe 306 Gas disk 307, pressurized canister uniformly is entered after release, is sufficiently mixed with sewage, afterwards by entering release pond at the top of pressurized canister 319, gas becomes intensive minute bubbles release in release pond, drives oil slick to float at the top of sewage, sewage is flowed into run-off After 320, the oil slick at top is flowed into air flotation slot 310, is flowed into oil slick pond 325 and is collected through overflow valve 324.
The sewage of bottom in run-off can be discharged by low spot drain valve 323, and the sewage in air flotation slot 310 passes through Control valve 326 is discharged, and realizes water-oil separating, while reduces the COD value in sewage.
In addition, the particulate matter in sewage, by pressurized canister 303, forced feed tank 304, release pond 319 and run-off 320 After Multistage settling, separation of solid and liquid is fully realized, so that the solid waste in sewage is efficiently separated.
Specific embodiment described herein is only to spirit explanation for example of the invention.Technology belonging to the present invention is led The technical staff in domain can be made various modifications or supplement to described specific embodiment or be replaced using similar mode Generation, but without departing from the spiritual of the present invention or surmount scope defined in appended claims.
Although flotation tank mechanism 301, pressurizer mechanism 302, pressurized canister 303, forced feed tank have more been used herein 304th, forced feed pipe 305, air inlet pipe 306, exhaust disk 307, compressed air generator 308, flotation tank 309, air flotation slot 310, Venthole 311, the first pressurized precipitation area 312, the first pressurised exhaust pipe 313, the second pressurized precipitation area 314, the second pressurised exhaust Pipe 315, the first spiral board 316, the second spiral board 317, forced feed mouth 318, release pond 319, run-off 320, air supporting plate 321st, the term such as air supporting link slot 322, low spot drain valve 323, overflow valve 324, oil slick pond 325, control valve 326, but do not arrange Except the possibility using other terms.Using these terms just for the sake of more easily describing and explaining the essence of the present invention, Any additional limitation is construed as all to disagree with spirit of the present invention.

Claims (10)

1. a kind of sewage pressure floatation air device, including flotation tank mechanism (301) and pressurizer mechanism (302), it is characterised in that
Described pressurizer mechanism (302) includes pressurized canister (303), and forced feed tank (304) is arranged with outside pressurized canister (303), Described pressurized canister (303) is fixedly connected with forced feed tank (304), and pressurized canister is communicated with forced feed tank on (303) (304) forced feed pipe (305), pressurized canister (303) is interior to be provided with air inlet pipe (306), is connected with air inlet pipe (306) some Individual exhaust disk (307), described exhaust disk (307) inside pressurized canister (303) with connecting, described air inlet pipe (306) connection pressure Contracting air generator (308),
Described flotation tank mechanism (301) includes flotation tank (309), and is centered around the air supporting of flotation tank (309) top edge Groove (310), air flotation slot (310) bottom are connected with discharge nozzle.
2. sewage pressure floatation air device according to claim 1, it is characterised in that some disks (307) that are vented are along air inlet pipe (306) axially spaced-apart is uniformly set, and is vented on disk (307) and is densely covered with venthole (311), compressed air generator (308) it is compressed air cylinder or air compressor.
3. sewage pressure floatation air device according to claim 1, it is characterised in that the bottom of described pressurized canister (303) Bore is gradually reduced to form the first pressurized precipitation area (312), and first pressurized precipitation area (312) bottom is connected with the first pressurised exhaust It is outside that pipe (313) and the first pressurised exhaust pipe (313) extend forced feed tank (304).
4. sewage pressure floatation air device according to claim 3, it is characterised in that described forced feed tank (304) bottom Portion's bore is gradually reduced to form the second pressurized precipitation area (314), and second pressurized precipitation area (314) bottom is connected with the second pressurization row Put pipe (315) and the second pressurised exhaust pipe (315) extends forced feed tank (304) outside.
5. sewage pressure floatation air device according to claim 1, it is characterised in that the inwall of described pressurized canister (303) On be fixed with first spiral board being inclined to set (316), the first spiral board (316) is located at forced feed pipe (305) The outer wall of the spiral board of outlet face first (316) of top and forced feed pipe (305).
6. sewage pressure floatation air device according to claim 5, it is characterised in that described forced feed tank (304) Inwall is fixed with second spiral board being inclined to set (317), and forced feed tank is additionally provided with forced feed mouth on (304) (318), the second spiral board (317) is located at forced feed mouth (318) top and forced feed mouth (318) second spiral board of face (317)。
7. sewage pressure floatation air device according to claim 6, it is characterised in that described the first spiral board (316) and Second spiral board (317) is in inverted round stage taper.
8. sewage pressure floatation air device according to claim 1, it is characterised in that described flotation tank (309) includes releasing Pond (319) and run-off (320) are put, release pond (319) is connected at the top of pressurized canister (303) with pipeline, the bottom of release pond (319) Connected with run-off (320), the height of described run-off (320) is less than air flotation slot (310).
9. sewage pressure floatation air device according to claim 8, it is characterised in that described release pond (319) bottom is set There is air supporting plate (321), aperture, the junction of release pond (319) and pressurized canister (303) are densely covered with described air supporting plate (321) Above air supporting plate (321), air supporting link slot (322), described air supporting link slot are provided with below air supporting plate (321) (322) release pond (319) and run-off (320) are connected.
10. sewage pressure floatation air device according to claim 9, it is characterised in that described release pond (319) and overflow Pond (320) is respectively equipped with low spot drain valve (323), and overflow valve (324), described overflow valve are provided with air flotation slot (310) (324) oil slick pond (325) are connected, air flotation slot (310) bottom is provided with control valve (326).
CN201711042396.6A 2017-10-31 2017-10-31 Sewage pressure floatation air device Withdrawn CN107814425A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711042396.6A CN107814425A (en) 2017-10-31 2017-10-31 Sewage pressure floatation air device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201711042396.6A CN107814425A (en) 2017-10-31 2017-10-31 Sewage pressure floatation air device

Publications (1)

Publication Number Publication Date
CN107814425A true CN107814425A (en) 2018-03-20

Family

ID=61603436

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201711042396.6A Withdrawn CN107814425A (en) 2017-10-31 2017-10-31 Sewage pressure floatation air device

Country Status (1)

Country Link
CN (1) CN107814425A (en)

Similar Documents

Publication Publication Date Title
CN107804928A (en) Sewage-treatment plant
CN1089017C (en) Method and apparatus for separatin non-soluble particles from liquid
MX2007014364A (en) Anaerobic purification device.
CN107285511A (en) A kind of effective integrated waste-oil scavenger of oily waste water
CN204138447U (en) A kind of aeration horizontal-flow grit chamber
CN208356292U (en) A kind for the treatment of tank
CN101423262A (en) Air-floated water treating apparatus
CN201070558Y (en) Cavitation air floation device
CN107879410A (en) Pressurizer mechanism for sewage pressure floatation air
CN109179778B (en) Boiler ash water treatment and reuse device
CN201108760Y (en) Highly effective tipping plate precipitating tank
KR100826971B1 (en) Natural water clean apparatus
CN207726766U (en) Flotation tank for water-oil separating
KR20080031772A (en) A settling tank for a sewage disposal
CN207845205U (en) Sewage pressure floatation air device
CN215161537U (en) Air flotation oil separator
CN107814425A (en) Sewage pressure floatation air device
KR101094188B1 (en) Water treatment system using dissolved air flotation
CN207891083U (en) Pressurizer mechanism for sewage pressure floatation air
CN107117763A (en) Oil, water, mud separator
CN110615551B (en) Sewage treatment system and method for treating sewage by using same
CN106946381A (en) A kind of Combined-type water purifier
CN202740824U (en) Oily sewage filter used for environmental protection of chemical industry
JPH11309446A (en) Composite water purifying device
CN207986874U (en) Sewage-treatment plant

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
WW01 Invention patent application withdrawn after publication
WW01 Invention patent application withdrawn after publication

Application publication date: 20180320