CN106118714B - Crude(oil)unit - Google Patents
Crude(oil)unit Download PDFInfo
- Publication number
- CN106118714B CN106118714B CN201610584014.1A CN201610584014A CN106118714B CN 106118714 B CN106118714 B CN 106118714B CN 201610584014 A CN201610584014 A CN 201610584014A CN 106118714 B CN106118714 B CN 106118714B
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- CN
- China
- Prior art keywords
- oil
- heat exchanger
- cooling
- tower
- tube
- 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.)
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Classifications
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G7/00—Distillation of hydrocarbon oils
- C10G7/10—Inhibiting corrosion during distillation
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G7/00—Distillation of hydrocarbon oils
Abstract
A kind of crude(oil)unit, belong to oil Refining Technologies field, including atmospheric tower, often push up oil circulation device, cooling device and products pot, atmospheric tower interior edge short transverse is arranged at intervals with multiple tower trays, often top oil circulation device includes oil-gas transportation pump and often top heat exchanger, oil-gas transportation pump connect with the inner chamber of atmospheric tower, often pushes up heat exchanger and is connected with oil-gas transportation pump, tower tray positioned at highest point is connected with often top heat exchanger, and the tower tray, cooling device and products pot positioned at highest point are sequentially communicated.This crude(oil)unit eliminates the cold reflux circulation of normal pressure column overhead on the basis of existing technology, it is possible to prevente effectively from cryogenic effect caused by cold reflux, reduce the corrosive substance in tower, water caused underdeposit corrosion when re-vaporizing is avoided simultaneously, so as to ensure the normal work of atmospheric tower, extend the service life of atmospheric tower, the defects of effectively making up prior art.
Description
Technical field
The present invention relates to oil Refining Technologies field, in particular to crude(oil)unit.
Background technology
At present, crude quality deterioration is a trend that domestic and international Petrochemical Enterprises face, contained chlorine in crude oil, sulphur, nitrogen,
The corrosive impurities such as acid bring many etching problems to crude oil processing, wherein etching problem is generally deposited as caused by chloride
Danger is being brought to refining equipment safe operation.Main corrosion problem in crude(oil)unit overhead system is drawn by chloride
Rise." chloride corrosion " mainly includes following two mechanism：1) hydrogen-chloride etching；2) underdeposit corrosion.Crude(oil)unit by
The position of chloride corrosion is concentrated mainly on five layers of atmospheric tower top tower tray, tower body and part volatilization line and Atmospheric Tower condensation is cold
But system.
Occur crude(oil)unit corrosion loss may up to oil plant whole corrosion loss 50%.Fouling and corruption
The basic reason of erosion is usually relevant with the basic configuration selection of device, once the configuration of device is selected, even if changing the behaviour of device
Make condition and addition anti-corrosion agent, the problem of fouling can not be fully solved and corroded.Existing Atmospheric Tower typically can all have
Return-flow system is pushed up, this method has a series of weak point：First, temperature is too low, hydrogen chloride dew point corrosion and salt crust are caused；
Second, backflow carries partial corrosion material, the corrosion of distillation tower top is aggravated.
The content of the invention
It is an object of the invention to provide a kind of crude(oil)unit, its can be effectively improved the corrosion of normal pressure column overhead and
Fouling.
What embodiments of the invention were realized in：
A kind of crude(oil)unit, it includes atmospheric tower, often pushes up oil circulation device, cooling device and products pot, described
Atmospheric tower interior edge short transverse is arranged at intervals with multiple tower trays, and the often top oil circulation device includes oil-gas transportation pump and often taken one's place
Hot device, the oil-gas transportation pump connect with the inner chamber of the atmospheric tower, and the often top heat exchanger connects with the oil-gas transportation pump,
The tower tray positioned at highest point connects with the often top heat exchanger, positioned at the tower tray, cooling device and the production of highest point
Product tank is sequentially communicated.
Further, in preferred embodiments of the present invention, the often top heat exchanger is provided with three and respectively first
Heat exchanger, the second heat exchanger and the 3rd heat exchanger, the oil-gas transportation pump, the First Heat Exchanger, second heat exchanger,
3rd heat exchanger and the tower tray positioned at highest point are sequentially communicated.
Further, in preferred embodiments of the present invention, the cooling device include cooling heat exchanger, air cooler and
Water cooler, the tower tray, cooling heat exchanger, air cooler, water cooler and products pot positioned at highest point are sequentially communicated.
Further, in preferred embodiments of the present invention, the air cooler includes into flow tube, cooling tube and goes out stream
Pipe, it is described enter flow tube and the spaced and parallel setting of the outflow tube, the both ends of the cooling tube are entered flow tube and to go out to flow with described respectively
Pipe connects, the cooling tube have more and along it is described enter flow tube or outflow tube length direction be arranged at intervals.
Further, in preferred embodiments of the present invention, it is provided between adjacent two cooling tubes corrugated
Fin, the outer wall of the both sides in the finned length direction respectively with two adjacent cooling tubes are connected.
Further, in preferred embodiments of the present invention, the cooling tube is multiple in being provided with cuboid and its
The gas channel being parallel to each other, width of multiple gas channels along the cooling tube are arranged at intervals.
Further, in preferred embodiments of the present invention, the water cooler includes inlet tube, outlet and heat exchange
Tank, is provided with first baffle and second baffle in the heat exchange tank, and the first baffle and the second baffle are by the heat exchange
Tank inner chamber cut-off be entrance cavity, heat exchanging chamber and outlet plenum, the entrance cavity connects with the inlet tube, the outlet plenum and
Outlet connection, is provided with more heat exchanger tubes in the heat exchanging chamber, the both ends of the every heat exchanger tube respectively with it is described enter
Oral cavity is connected with the outlet plenum, and water inlet and delivery port, the water inlet and delivery port point are additionally provided with the heat exchange tank
Do not connected with the heat exchanging chamber.
Further, in preferred embodiments of the present invention, the more heat exchanger tubes are in the shape of a spiral.
Further, in preferred embodiments of the present invention, the water cooler also includes water-circulating cooling device, the circulation
Water cooling plant includes the first valve, circulation pipe and the second valve, and first valve is arranged on the outlet, the circulation
Pipe one end is communicated on the outlet and connectivity part is between first valve and the heat exchange tank, and the other end is communicated in
On the inlet tube, second valve is arranged on the circulation pipe.
The beneficial effect of the embodiment of the present invention is：
This crude(oil)unit eliminates the cold reflux circulation of normal pressure column overhead on the basis of existing technology, can be effective
Cryogenic effect caused by cold reflux is avoided, reduces the corrosive substance in tower, while avoids water when re-vaporizing under caused dirt
Corrosion, so as to ensure the normal work of atmospheric tower, extends the service life of atmospheric tower, the defects of effectively making up prior art.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below by embodiment it is required use it is attached
Figure is briefly described, it will be appreciated that the following drawings illustrate only certain embodiments of the present invention, therefore be not construed as pair
The restriction of scope, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to this
A little accompanying drawings obtain other related accompanying drawings.
Fig. 1 is the structural representation of crude(oil)unit provided in an embodiment of the present invention；
Fig. 2 is the structural representation of air cooler provided in an embodiment of the present invention；
Fig. 3 is the structural representation of water cooler provided in an embodiment of the present invention.
Reference collects：
Atmospheric tower 100；Often top oil circulation device 200；Oil-gas transportation pump 210；First Heat Exchanger 220；Second heat exchanger
230；3rd heat exchanger 240；Cooling device 300；Cooling heat exchanger 310；Air cooler 320；Enter flow tube 321；Cooling tube 322；Wing
Piece 323；Outflow tube 324；Water cooler 330；Inlet tube 331；Heat exchange tank 332；Outlet 333；First baffle 334；Second baffle
335；Heat exchanger tube 336；Circulation pipe 337；Products pot 400.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
Part of the embodiment of the present invention, rather than whole embodiments.The present invention implementation being generally described and illustrated herein in the accompanying drawings
The component of example can be configured to arrange and design with a variety of.
Therefore, below the detailed description of the embodiments of the invention to providing in the accompanying drawings be not intended to limit it is claimed
The scope of the present invention, but be merely representative of the present invention selected embodiment.It is common based on the embodiment in the present invention, this area
The every other embodiment that technical staff is obtained under the premise of creative work is not made, belong to the model that the present invention protects
Enclose.
It should be noted that：Similar label and letter represents similar terms in following accompanying drawing, therefore, once a certain Xiang Yi
It is defined, then it further need not be defined and explained in subsequent accompanying drawing in individual accompanying drawing.
In the description of the invention, it is necessary to explanation, term " " center ", " on ", " under ", "left", "right", " vertical ",
The orientation or position relationship of the instruction such as " level ", " interior ", " outer " be based on orientation shown in the drawings or position relationship, or should
Invention product using when the orientation usually put or position relationship, be for only for ease of the description present invention and simplify description, without
It is instruction or implies that signified device or element there must be specific orientation, with specific azimuth configuration and operation, therefore not
It is understood that as limitation of the present invention.In addition, term " first ", " second ", " the 3rd " etc. are only used for distinguishing description, and can not manage
Solve to indicate or implying relative importance.
In addition, the term such as term " level ", " vertical " is not offered as requiring part abswolute level or pendency, but can be slightly
Low dip.Such as " level " only refers to that its direction is more horizontal with respect to for " vertical ", is not to represent that the structure must be complete
It is complete horizontal, but can be slightly tilted.
In the description of the invention, it is also necessary to explanation, unless otherwise clearly defined and limited, term " setting ",
" installation ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or one
Connect body；Can be mechanical connection or electrical connection；Can be joined directly together, can also be indirect by intermediary
It is connected, can is the connection of two element internals.For the ordinary skill in the art, on being understood with concrete condition
State the concrete meaning of term in the present invention.
Fig. 1 is refer to, the present embodiment provides a kind of crude(oil)unit, and it includes atmospheric tower 100, often pushes up oil circulation device
200th, cooling device 300 and products pot 400.
Wherein, atmospheric tower 100 is prior art, is mainly used in the distillation of crude oil, and it is internally provided with multiple tower trays, multiple
Tower tray is arranged at intervals along short transverse.
Often top oil circulation device 200 include oil-gas transportation pump 210 and often top heat exchanger, often push up heat exchanger be provided with three and
Respectively First Heat Exchanger 220, the second heat exchanger 230 and the 3rd heat exchanger 240.Oil-gas transportation pump 210 and atmospheric tower 100
Inner chamber connects, and First Heat Exchanger 220 connects with oil-gas transportation pump 210, and the second heat exchanger 230 connects with the First Heat Exchanger 220
Logical, the second heat exchanger 230 connects with the 3rd heat exchanger 240, and the tower tray positioned at highest point connects with the 3rd heat exchanger 240.
Cooling device 300 includes cooling heat exchanger 310, air cooler 320 and water cooler 330, tower tray positioned at highest point,
Cooling heat exchanger 310, air cooler 320, water cooler 330 and products pot 400 are sequentially communicated.
The operation principle and process of this crude(oil)unit are such：Oil gas is extracted out from the inner chamber of atmospheric tower 100, so
It is returned directly in atmospheric tower 100 in the tower tray of highest point after often top heat exchanger cooling, is then flowed out again from the tower tray afterwards, according to
It is secondary after the cooling of cooling heat exchanger 310, air cooler 320 and water cooler 330, into products pot 400.Finally in product
Under acid water centrifugation in tank 400, obtain naphtha cocurrent and go out products pot 400.
Above-mentioned air cooler 320 can use various structures and form, reference picture 2, and in the present embodiment, air cooler 320 includes
Enter flow tube 321, cooling tube 322 and outflow tube 324, enter the 324 spaced and parallel setting of flow tube 321 and outflow tube.Cooling tube 322
Both ends connect with entering flow tube 321 and outflow tube 324 respectively, and cooling tube 322 has more and flow tube 321 or outflow tube 324 are entered in edge
Length direction be arranged at intervals.Every cooling tube 322 is in cuboid and multiple gas channels being parallel to each other are provided with it,
Width of multiple gas channels along cooling tube 322 is arranged at intervals.Connecing for oil gas and cooling tube 322 can be increased by so setting
Contacting surface is accumulated, so as to improve cooling effect.
Further, corrugated fin 323 is provided between adjacent two cooling tubes 322, the length direction of fin 323
Outer wall of the both sides respectively with two adjacent cooling tubes 322 is connected.Set fin 323 purpose be increase cooling tube 322 with
The contact area of surrounding air, so as to effectively improve the cooling effectiveness of air cooler 320.
The operation principle and process of this air cooler 320 are such：High-temperature oil gas enters flow tube 321, then through excessive
After root cooling tube 322, reach outflow tube 324 and flow out, during by cooling tube 322, the heat of high-temperature oil gas can lead to
Supercooling pipe 322 and fin 323 are delivered in the air of surrounding, so as to constantly scatter and disappear, realize the effect that cools.
Above-mentioned water cooler 330 can use various structures and form, reference picture 3, and in the present embodiment, water cooler 330 includes
Inlet tube 331, outlet 333 and heat exchange tank 332, first baffle 334 and second baffle 335 are provided with heat exchange tank 332,
The inner chamber cut-off of heat exchange tank 332 be entrance cavity, heat exchanging chamber and outlet plenum by one baffle plate 334 and second baffle 335, entrance cavity and
Inlet tube 331 connects, and outlet plenum connects with outlet 333.
More heat exchanger tubes 336 are provided with heat exchanging chamber, the both ends of every heat exchanger tube 336 connect with entrance cavity and outlet plenum respectively
It is logical, and more heat exchanger tubes 336 are in the shape of a spiral, and the contact area for increasing heat exchanger tube 336 and water is using spiral helicine purpose,
So as to improve the heat exchange cooling effect to high-temperature oil gas.It is additionally provided with water inlet and delivery port on heat exchange tank 332, water inlet and goes out
The mouth of a river connects with heat exchanging chamber respectively.
Further, water cooler 330 also includes water-circulating cooling device, and water-circulating cooling device includes the first valve, circulation pipe
337 and second valve, the first valve is from stop valve and is arranged on outlet 333, and circulation pipe 337 is U-shaped, its be open two
One end is communicated on outlet 333 in end and connectivity part is between the first valve and heat exchange tank 332, and the other end is communicated in entrance
On pipe 331, the second valve also from stop valve and is arranged on circulation pipe 337.
The operation principle and process of this water cooler 330 are such：First, cooling water enters heat exchanging chamber by water inlet,
Flowed out after filling heat exchanging chamber from outlet pipe.Then, high-temperature oil gas is entered in entrance cavity by inlet tube 331, then again through excessive
After root heat exchanger tube 336, reach in outlet plenum, finally flowed out from outlet 333.In high-temperature oil gas through excessive root heat exchanger tube 336
During, the heat in high-temperature oil gas can pass to the cooling water in heat exchanging chamber by heat exchanger tube 336, be cooled so as to realize
Effect.
Finally, oil gas is cooled down repeatedly if necessary to circulation, can be realized by water-circulating cooling device.Specifically
Ground, the first valve closed on outlet 333, the second valve on circulation pipe 337 is opened, enters inlet/outlet through overcooled oil gas
After pipe 333, because the first valve is closed, therefore it will enter in circulation pipe 337, so as to along the weight of circulation pipe 337
Newly return in inlet tube 331, back flow back into heat exchange tank 332 and cooled down again.The apparatus structure is simple, easy to operate, can be with
Effectively realize the circulating cooling of oil gas.
Crude(oil)unit provided in an embodiment of the present invention has the advantages that：
1st, cryogenic effect caused by cold reflux is avoided：When cold reflux is returned in tower, local temperature in destilling tower can be caused
Too low region, cause serious salt acid dew piont corrosion.Cold reflux is eliminated in the present invention, is not in local temperature point mistake
Low area, occur so as to avoid such corrosion.
2nd, the corrosive substance in tower is reduced：When having backflow, oil product can carry corrosive substance and return in tower, cause
Anticaustic.After cancelling cold reflux, the corrosive substance in tower is reduced, and slow down the generation of hydrogen-chloride etching and ammonium salt fouling.
3rd, water caused underdeposit corrosion when re-vaporizing is avoided：Water once generate, will together with hydro carbons in tower to flow down
Dynamic, water enters higher temperature province, will re-vaporize, and the concentration of corrosivity solute improves, and after water completely vaporizes, leaving to draw
Play the solid precipitation of underdeposit corrosion.Cold reflux is eliminated in the present invention, does not have the generation of water, also avoids this type
Corrosion.
The preferred embodiments of the present invention are these are only, are not intended to limit the invention, for those skilled in the art
For member, the present invention can have various modifications and variations.Any modification within the spirit and principles of the invention, being made,
Equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (9)
1. a kind of crude(oil)unit, it is characterised in that including atmospheric tower, often push up oil circulation device, cooling device and product
Tank, the atmospheric tower interior edge short transverse are arranged at intervals with multiple tower trays, and the often top oil circulation device includes oil-gas transportation pump
With normal top heat exchanger, the oil-gas transportation pump connects with the inner chamber of the atmospheric tower, and often top heat exchanger and the oil gas are defeated
Pump is sent to connect, the tower tray positioned at highest point connects with the often top heat exchanger, the tower tray positioned at highest point, described cold
But device and the products pot are sequentially communicated；Oil gas is extracted out from the inner chamber of the atmospheric tower, is then often taken one's place by described
It is returned directly to after hot device cooling in the atmospheric tower in the tower tray of highest point, then flows out from the tower tray, pass through successively again
After crossing the cooling of the cooling device, into the products pot.
2. crude(oil)unit according to claim 1, it is characterised in that the often top heat exchanger is provided with three and divided
Not Wei First Heat Exchanger, the second heat exchanger and the 3rd heat exchanger, the oil-gas transportation pump, the First Heat Exchanger, described
Two heat exchangers, the 3rd heat exchanger and the tower tray positioned at highest point are sequentially communicated.
3. crude(oil)unit according to claim 1, it is characterised in that the cooling device include cooling heat exchanger,
Air cooler and water cooler, positioned at highest point the tower tray, cooling heat exchanger, air cooler, water cooler and products pot successively
Connection.
4. crude(oil)unit according to claim 3, it is characterised in that the air cooler is included into flow tube, cooling tube
And outflow tube, it is described enter flow tube and the spaced and parallel setting of the outflow tube, the both ends of the cooling tube respectively with the influent stream
Pipe connects with the outflow tube, the cooling tube have more and along it is described enter flow tube or outflow tube length direction interval set
Put.
5. crude(oil)unit according to claim 4, it is characterised in that be provided between adjacent two cooling tubes
Corrugated fin, the outer wall of the both sides in the finned length direction respectively with two adjacent cooling tubes are connected.
6. crude(oil)unit according to claim 4, it is characterised in that the cooling tube in cuboid and its in set
Multiple gas channels being parallel to each other are equipped with, width of multiple gas channels along the cooling tube is arranged at intervals.
7. crude(oil)unit according to claim 3, it is characterised in that the water cooler includes inlet tube, outlet
And heat exchange tank, first baffle and second baffle are provided with the heat exchange tank, the first baffle and the second baffle will
The inner chamber of the heat exchange tank separates to form entrance cavity, heat exchanging chamber and outlet plenum, and the entrance cavity connects with the inlet tube, institute
State outlet plenum to connect with the outlet, more heat exchanger tubes, the both ends point of the every heat exchanger tube are provided with the heat exchanging chamber
Do not connected with the entrance cavity and the outlet plenum, water inlet and delivery port, the water inlet are additionally provided with the heat exchange tank
Connected respectively with the heat exchanging chamber with delivery port.
8. crude(oil)unit according to claim 7, it is characterised in that the more heat exchanger tubes are in the shape of a spiral.
9. crude(oil)unit according to claim 7, it is characterised in that the water cooler also includes water-circulating cooling
Put, the water-circulating cooling device includes the first valve, circulation pipe and the second valve, and first valve is arranged at the outlet
On, described circulation pipe one end is communicated on the outlet and connectivity part is between first valve and the heat exchange tank,
The other end is communicated on the inlet tube, and second valve is arranged on the circulation pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610584014.1A CN106118714B (en) | 2016-07-22 | 2016-07-22 | Crude(oil)unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610584014.1A CN106118714B (en) | 2016-07-22 | 2016-07-22 | Crude(oil)unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106118714A CN106118714A (en) | 2016-11-16 |
| CN106118714B true CN106118714B (en) | 2018-02-13 |
Family
ID=57290368
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610584014.1A Active CN106118714B (en) | 2016-07-22 | 2016-07-22 | Crude(oil)unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106118714B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108865211A (en) * | 2018-07-13 | 2018-11-23 | 佛山市三水区精联自动化设备有限公司 | A kind of crude oil stabilizer |
| CN109181742B (en) * | 2018-09-04 | 2021-01-12 | 广德正元蔬果家庭农场 | Quick distillation plant of petroleum crude oil |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB446137A (en) * | 1935-01-15 | 1936-04-24 | Foster Wheeler Ltd | Improvements in fractional distillation |
| CN1986741A (en) * | 2006-12-01 | 2007-06-27 | 华南理工大学 | Auxiliary fractional tower and its gasoline catalyzing and olefine reducing modification process |
| CN102746883A (en) * | 2011-04-22 | 2012-10-24 | 中国石油天然气股份有限公司 | Oil atmospheric vacuum distillation technology |
-
2016
- 2016-07-22 CN CN201610584014.1A patent/CN106118714B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB446137A (en) * | 1935-01-15 | 1936-04-24 | Foster Wheeler Ltd | Improvements in fractional distillation |
| CN1986741A (en) * | 2006-12-01 | 2007-06-27 | 华南理工大学 | Auxiliary fractional tower and its gasoline catalyzing and olefine reducing modification process |
| CN102746883A (en) * | 2011-04-22 | 2012-10-24 | 中国石油天然气股份有限公司 | Oil atmospheric vacuum distillation technology |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106118714A (en) | 2016-11-16 |
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