CN106437821A - System for purifying air in tunnel - Google Patents
System for purifying air in tunnel Download PDFInfo
- Publication number
- CN106437821A CN106437821A CN201611075733.7A CN201611075733A CN106437821A CN 106437821 A CN106437821 A CN 106437821A CN 201611075733 A CN201611075733 A CN 201611075733A CN 106437821 A CN106437821 A CN 106437821A
- Authority
- CN
- China
- Prior art keywords
- air
- gas
- sterilization chamber
- connect
- pipe
- 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
Links
- 239000000428 dust Substances 0.000 claims abstract description 42
- 230000001954 sterilising effect Effects 0.000 claims abstract description 33
- 239000007788 liquid Substances 0.000 claims abstract description 24
- 238000009423 ventilation Methods 0.000 claims abstract description 21
- 238000002156 mixing Methods 0.000 claims abstract description 6
- 238000004659 sterilization and disinfection Methods 0.000 claims description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 28
- 238000000746 purification Methods 0.000 claims description 17
- 238000000926 separation method Methods 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 238000003860 storage Methods 0.000 claims description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 5
- 229910052760 oxygen Inorganic materials 0.000 claims description 5
- 239000001301 oxygen Substances 0.000 claims description 5
- 239000000443 aerosol Substances 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 238000005119 centrifugation Methods 0.000 claims 1
- 238000009434 installation Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 11
- 230000005641 tunneling Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 7
- 238000009792 diffusion process Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 229910002091 carbon monoxide Inorganic materials 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 231100000331 toxic Toxicity 0.000 description 3
- 230000002588 toxic effect Effects 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 235000013312 flour Nutrition 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 206010035653 pneumoconiosis Diseases 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000000518 rheometry Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
- E21F5/02—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires by wetting or spraying
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/62—Carbon oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/72—Organic compounds not provided for in groups B01D53/48 - B01D53/70, e.g. hydrocarbons
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/76—Gas phase processes, e.g. by using aerosols
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
- E21C35/22—Equipment for preventing the formation of, or for removal of, dust
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- General Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biomedical Technology (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Dispersion Chemistry (AREA)
- Mechanical Engineering (AREA)
- Separation Of Particles Using Liquids (AREA)
Abstract
The invention discloses a system for purifying air in a tunnel. The system comprises a dust-collecting filter pipe (1), and is characterized in that the dust-collecting filter pipe (1) is connected with a sterilizing chamber (2); the sterilizing chamber (2) is connected with a ventilation fan (3); the ventilation fan (3) is connected with an air liquid mixing tank (5); the air liquid mixing tank (5) is connected with an air curtain dust collector (10). The system can solve the technical problems of the prior art that the purifying effect of an air purifying device in the tunnel is poor, the air purifying device is difficult to move, the treating air volume of the matched dust collector is large, the weight and the volume thereof are both large, the movement is difficult and the movement and arrangement of the matched devices often cannot be timely implemented, so that the dust-reducing effect of the tunneling work surface is reduced, the exerting of the driving machinery effect is influenced, and the like.
Description
Technical field
The invention belongs to air purifying process, the system of air in more particularly, to a kind of purification tunnel.
Background technology
Increasingly improve with tunnel machine level, tunnel piercing flour dirt yield is increasing.In tunnel machine
Driving face, dust concentration is high, and this not only brings unsafe hidden danger to tunnel, easily causes safety problem, and seriously
Infringement workman's is healthy, causes the pneumoconiosis of worker.In order to solve the problems, such as mechanization work flour dirt to external diffusion, closely
Nian Lai, domestic employ dust removal by ventilation, wet operation, purify and distinguished and admirable wait dust suppression.But because dirt source is often moved, high speed
Press-in is distinguished and admirable to carry a large amount of dust to external diffusion from work surface, causes most dust-contained airflow can not effectively be purified, makes
The dust-laying effect of these measures is affected.Abroad, as the former Soviet Union adopts air devider, distinguished and admirable for press-in before being introduced into work surface
Just shunt, make most of distinguished and admirable meet head on without work surface.But the limitation of this measure is can not effectively to dispel heading driver
Make face harmful gass.Germany adopts air duct in terms of colliery.I.e. in press-in air duct end, made of iron attached using several sections
Wall air duct, the high speed winds rheology making press-in is rotary airflow, simultaneously again with certain speed axial advancement, so as to seal work towards
The dust cloud of external diffusion.But air duct weight made of iron, it is big that the difficult and supporting cleaner unit of movement processes air quantity, its weight and body
Long-pending all big, mobile equally difficult, the shifting of often corollary equipment sets and can not keep up with time, thus reducing the fall of driving face
Dirt effect, the performance of impact road heading machinery efficiency.
Content of the invention
The technical problem to be solved in the present invention：There is provided a kind of system of air in purification tunnel, to solve prior art
The difficult and supporting cleaner unit of the bad movement of tunnel inner air-cleaning device clean-up effect processes air quantity greatly, and its weight and volume is equal
Greatly, mobile equally difficult, the shifting of often corollary equipment sets and can not keep up with time, thus reducing the depositing dust effect of driving face
Really, the technical problem such as performance of impact road heading machinery efficiency.
Technical solution of the present invention：
The system of air in a kind of purification tunnel, it includes dust suction filter pipe, and dust suction filter pipe is connected with sterilization chamber, sterilization
Room is connected with ventilation blower, and ventilation blower is connected with gas-liquid mixed case, and gas-liquid mixed case is connected with air curtain cleaner unit.
Filter tube is removed with sterilization chamber, sterilization chamber and ventilation blower, ventilation blower and gas-liquid mixed case and gas-liquid blending bin and air curtain
It is connected by ring flange and bolt connection between dirt device, between ring flange, use rubber seal.
Sterilization chamber is provided with three layers of separation sterilization chamber, every layer of separation sterilization two high temperature resistant magnetic tube of indoor location.
In sterilization chamber inlet end, oxygen cylinder is installed.
Ventilation blower is centrifugal fan.
The filter of dust suction filter pipe is pyramidal structure, is provided with wet type nonwoven gauze, dust suction filter pipe in filter
Bottom is provided with water tank, and water tank is connected with outlet, and the upper end of dust suction filter pipe is provided with water inlet pipe, in dust suction filter pipe
Water inlet pipe be provided with aerosol apparatus.
Gas-liquid mixed case is provided with water pipe, the external water source of water pipe, and water pipe is sequentially provided with regulating valve, strainer valve and non-return
Valve.
Air curtain cleaner unit includes straight tube, and straight tube is connected with isocon, and isocon is connected with gas-liquid temporary storage cavity, gas-liquid temporary storage cavity
It is connected with steel nozzle
Beneficial effects of the present invention：
The invention provides a kind of simple, light, small volume tunnel dust settling system, road heading machinery equipment can be mounted the system to
On, can move forward at random；This system can produce a kind of air curtain, so as to seal development machine cutting when produced to external diffusion
Dust cloud, the harmful gass of tunnel top can also be dispelled simultaneously.In the presence of air curtain and press-in are distinguished and admirable, work surface shape
Become the working environment of circulation, so that dust laden air is effectively entered in tunnel dust settling device and purify, thus having reached reduction driving
Mechanization face dust concentration, improves working environment, and protection workman is healthy, ensures the purpose of safety in production.
Advantages of the present invention：
1, the aqueous vapor blown obliquely can be produced in tunnel, therefore, it can dispel the harmful gass of top board accumulation, and can stop
Dust cloud is to external diffusion moreover it is possible to cleaning dusty air.
2, dust-removing device of air-curtain small volume, lightweight, can be directly installed on development machine mechanical platform, before realizing automatically with machine
Move, set conveniently using simple, shifting, no gear driver regards the disadvantage of edge.
3, due to the pumping function of the air curtain air blast effect distinguished and admirable with press-in and centrifugal type efficient ventilation blower, thus can be in work
Make face and form push pull velocity field, suck dust laden air so as to effective, improve the dust-laying effect of work surface.
4, employ Wet-type high-efficient nonwoven gauze and make filter cloth, thus purification efficiency is high, up to more than, especially for
Less than woods dust, clean-up effect is good more than general cleaner unit.
5, sterilization chamber can make toxic and harmful, and a small amount of gas, carbon monoxide etc. are oxidized to innocuous gas it is ensured that employee
Healthy.
6, present configuration is simple, easy accessibility, and processing and manufacturing is easy, low cost.
Brief description：
Fig. 1 is present configuration schematic diagram；
Fig. 2 is dust-absorbing filtering pipe suction port schematic diagram of the present invention；
Fig. 3 is dust-absorbing filtering tubular construction schematic diagram of the present invention；
Fig. 4 is sterilization chamber structural representation of the present invention.
Specific embodiment：
The system of air in a kind of purification tunnel（See Fig. 1）, it includes dust suction filter pipe 1, dust suction filter pipe 1 and sterilization chamber
2 connections, sterilization chamber 2 is connected with ventilation blower 3, ventilation blower 3 and gas-liquid mixed case（5）Connection, gas-liquid mixed case 5 and air curtain cleaner unit
10 connections.
Ventilation blower 3 is driven by motor 4.
Filter tube 1 and sterilization chamber 2, sterilization chamber 2 and ventilation blower 3, ventilation blower 3 and gas-liquid mixed case 5 and gas-liquid blending bin 5 with
Be connected by ring flange and bolt connection between air curtain cleaner unit 10, use rubber seal between ring flange it is ensured that system close
Closing property, improves purification efficiency.
Sterilization chamber 2 is provided with three layers of separation sterilization chamber 26, installs two high temperature resistant magnetic tubes 25, really in every layer of separation sterilization chamber 26
The gas protecting entrance sterilization chamber can be sterilized completely.
In sterilization chamber 2 inlet end, oxygen cylinder 15 is installed.Under suction function, the gas that can sterilize with the need flows to oxygen
Enter high temperature resistant magnetic tube 25 and carry out oxidation reaction, eliminate the harmful gass such as a small amount of gas in gas, carbon monoxide.
Ventilation blower 3 is centrifugal fan；Make that whole system has efficiency high, negative pressure, flow is big and overall dimensions are little
Advantage it is easy to carrying.
The filter 20 of dust suction filter pipe 1 is pyramidal structure, is provided with wet type nonwoven gauze 21, dust suction in filter 20
Filter tube 1 bottom is provided with water tank 22, and water tank 22 is connected with outlet 23, and the upper end of dust suction filter pipe 1 is provided with water inlet pipe 18, position
Water inlet pipe 18 in dust suction filter pipe 1 is provided with aerosol apparatus 19.
Gas-liquid mixed case 5 is provided with water pipe 6, the external water source of water pipe 6, and water pipe 6 is sequentially provided with regulating valve 9, strainer valve 8 and
Check-valves 7.
Air curtain cleaner unit 10 includes straight tube 11, and straight tube 11 is connected with isocon 12, and isocon 12 is with gas-liquid temporary storage cavity 13 even
Connect, gas-liquid temporary storage cavity 13 is connected with steel nozzle 14.
The operation principle of the present invention and work process：
When tunneler tunnels, produce high concentration powder dust clouds, by the steel nozzle 14 of air curtain cleaner unit 10 spray oblique
Overdraught is blocked, and meanwhile, dust, in the presence of steel nozzle 14 is distinguished and admirable and press-in is distinguished and admirable, makes dust enter dust suction with air-flow
In filter 1, in the presence of aerosol apparatus 19, dust is moistened cohesion, through filter 20, under dust and water droplet are intercepted
Come, sewage enters water tank 22, flows out from outlet pipe 23, the air of purification flows into sterilization chamber 2, the air of purification and oxygen mix,
Sequentially enter 3 layers of separation sterilization chamber 26, in the high temperature resistant magnetic tube 25 separating sterilization chamber 26, by toxic and harmful（A small amount of watt
This, carbon monoxide etc.）It is oxidized to carbon dioxide, prevent toxic and harmful from gathering, the mixed gas of sterilization are in the effect of negative pressure
Under, enter centrifugal fan 3, subsequent and water pipe 6 filter water mixes in gas-liquid mixed case 5, moves in centrifugal fan 3
Under power, blast in dust-removing device of air-curtain 10, top is sprayed onto tunnel top, using sweeping the abundant dedusting of wind apparatus up and down, bottom is adopted at middle part
It is directly injected near heading end pick with steel nozzle 14, abundant depositing dust, so that work surface dust is obtained to greatest extent
Reduce surfaceman healthy, ensure that construction safety is carried out.
Claims (8)
1. in a kind of purification tunnel air system, it includes dust suction filter pipe（1）It is characterised in that：Dust suction filter pipe
（1）With sterilization chamber（2）Connect, sterilization chamber（2）With ventilation blower（3）Connect, ventilation blower（3）With gas-liquid mixed case（5）Connect, gas-liquid
Blending bin（5）With air curtain cleaner unit（10）Connect.
2. in a kind of purification tunnel according to claim 1 air system it is characterised in that：Filter tube（1）With sterilization
Room（2）, sterilization chamber（2）With ventilation blower（3）, ventilation blower（3）With gas-liquid mixed case（5）With gas-liquid blending bin（5）With air curtain dedusting
Device（10）Between be connected by ring flange and bolt connection, use rubber seal between ring flange.
3. in a kind of purification tunnel according to claim 1 air system it is characterised in that：Sterilization chamber（2）
It is provided with three layers of separation sterilization chamber（26）, every layer of separation sterilization chamber（26）Two high temperature resistant magnetic tubes of interior installation（25）.
4. in a kind of purification tunnel according to claim 1 air system it is characterised in that：In sterilization chamber（2）Air inlet
Oxygen cylinder is installed at end（15）.
5. in a kind of purification tunnel according to claim 1 air system it is characterised in that：Ventilation blower（3）For centrifugation
Formula ventilation blower.
6. in a kind of purification tunnel according to claim 1 air system it is characterised in that：Dust suction filter pipe（1）
Filter（20）For pyramidal structure, filter（20）Inside it is provided with wet type nonwoven gauze（21）, dust suction filter pipe（1）Bottom sets
There is water tank（22）, water tank（22）With outlet（23）Connect, dust suction filter pipe（1）Upper end be provided with water inlet pipe（18）, it is located at
Dust suction filter pipe（1）Interior water inlet pipe（18）It is provided with aerosol apparatus（19）.
7. in a kind of purification tunnel according to claim 1 air system it is characterised in that：Gas-liquid mixed case（5）On
It is provided with water pipe（6）, water pipe（6）External water source, water pipe（6）On be sequentially provided with regulating valve（9）, strainer valve（8）And check-valves（7）.
8. in a kind of purification tunnel according to claim 1 air system it is characterised in that：Air curtain cleaner unit（10）Bag
Include straight tube（11）, straight tube（11）With isocon（12）Connect, isocon（12）With gas-liquid temporary storage cavity（13）Connect, gas-liquid temporary storage cavity
（13）With steel nozzle（14）Connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611075733.7A CN106437821A (en) | 2016-11-30 | 2016-11-30 | System for purifying air in tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611075733.7A CN106437821A (en) | 2016-11-30 | 2016-11-30 | System for purifying air in tunnel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106437821A true CN106437821A (en) | 2017-02-22 |
Family
ID=58222951
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611075733.7A Pending CN106437821A (en) | 2016-11-30 | 2016-11-30 | System for purifying air in tunnel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106437821A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107575260A (en) * | 2017-08-16 | 2018-01-12 | 武汉理工大学 | A kind of working face in the pit purification of air and environment conditioning movable type new equipment |
| CN108301863A (en) * | 2018-04-09 | 2018-07-20 | 贵州理工学院 | A kind of mining industry water flow jet dedusting oxygen supply device |
| CN113605955A (en) * | 2021-10-11 | 2021-11-05 | 徐州亚益吉机械制造有限公司 | Ventilation unit for mine tunnel |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2142500Y (en) * | 1992-07-22 | 1993-09-22 | 赤峰红花沟金矿 | Mine air purifier |
| CN2180784Y (en) * | 1992-09-26 | 1994-10-26 | 煤炭科学研究总院重庆分院 | Mining air curtain dust fall device |
| CN2242336Y (en) * | 1995-12-06 | 1996-12-11 | 高飞龙 | Device for purifying air in mine tunnel |
| CN205340414U (en) * | 2015-12-22 | 2016-06-29 | 安徽冠东电子科技有限公司 | Mine air purifier |
-
2016
- 2016-11-30 CN CN201611075733.7A patent/CN106437821A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2142500Y (en) * | 1992-07-22 | 1993-09-22 | 赤峰红花沟金矿 | Mine air purifier |
| CN2180784Y (en) * | 1992-09-26 | 1994-10-26 | 煤炭科学研究总院重庆分院 | Mining air curtain dust fall device |
| CN2242336Y (en) * | 1995-12-06 | 1996-12-11 | 高飞龙 | Device for purifying air in mine tunnel |
| CN205340414U (en) * | 2015-12-22 | 2016-06-29 | 安徽冠东电子科技有限公司 | Mine air purifier |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107575260A (en) * | 2017-08-16 | 2018-01-12 | 武汉理工大学 | A kind of working face in the pit purification of air and environment conditioning movable type new equipment |
| CN108301863A (en) * | 2018-04-09 | 2018-07-20 | 贵州理工学院 | A kind of mining industry water flow jet dedusting oxygen supply device |
| CN108301863B (en) * | 2018-04-09 | 2023-04-11 | 贵州理工学院 | Water flow jet dedusting and oxygen supply device for mining |
| CN113605955A (en) * | 2021-10-11 | 2021-11-05 | 徐州亚益吉机械制造有限公司 | Ventilation unit for mine tunnel |
| CN113605955B (en) * | 2021-10-11 | 2021-12-17 | 徐州亚益吉机械制造有限公司 | Ventilation unit for mine tunnel |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170222 |