CN203487118U - Device for recovering tail gas to prepare liquefied natural gas - Google Patents
Device for recovering tail gas to prepare liquefied natural gas Download PDFInfo
- Publication number
- CN203487118U CN203487118U CN201320623882.8U CN201320623882U CN203487118U CN 203487118 U CN203487118 U CN 203487118U CN 201320623882 U CN201320623882 U CN 201320623882U CN 203487118 U CN203487118 U CN 203487118U
- Authority
- CN
- China
- Prior art keywords
- unit
- gas
- liquefaction
- lng
- unstripped gas
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Separation By Low-Temperature Treatments (AREA)
Abstract
The utility model discloses a device for recovering a tail gas to prepare a liquefied natural gas. The device comprises a feed gas purification unit, a refrigerating compressor unit, a liquefying unit, a liquefied natural gas (LNG) storage unit and a diffusing unit, wherein the feed gas purification unit is used for carrying out purification operation on the feed gas and conveying the purified gas to the liquefying unit to carry out the liquefying operation; the refrigerating compressor unit is used for carrying out pressurized cooling operation on nitrogen, and conveying expanded and refrigerated low-temperature gas to the liquefying unit; the liquefying unit is used for receiving the feed gas from the purification operation and the low-temperature gas from the compression operation; the feed gas is controlled to be subjected to separation operation after being cooled by the low-temperature gas, and the LNG at the separate part is conveyed to carry out storage operation. By adopting the method capable of recovering and preparing the liquefied natural gas from the tail gas by adopting the device disclosed by the utility model, energy-saving measures of an enterprise can be effectively improved, the resource consumption of the enterprise is reduced, and the comprehensive utilization of energy sources of the enterprise is improved.
Description
Technical field
The utility model relates to the recovery technology field of natural gas liquids and methane, and especially a kind of tail gas recycle is prepared the device of natural gas liquids.
Background technology
At present, along with improving constantly of people's living standard, for the utilization of the energy also age different from the past, so, the energy-saving and cost-reducing of the energy all advocated in a lot of areas energetically now, reduces the loss of the energy, increases the utilising efficiency of the energy, the descendants that not only can better bring benefit to the mankind, has responded the guiding theory of country about sustainable development especially energetically.Investigation demonstration, the methane concentration in atmosphere has increased more than one times for many years, mainly by mankind's activity, is caused.The energy force rate carbonic acid gas that methane stops heat to distribute from atmospheric layer is high 23 times, and therefore reducing discharge of methane and reclaiming in time methane is to solve the good approach that global warming issue can take effect in a short time.
Wherein, recycle methane as clean energy, can not only reduce global discharge of methane, also promote the production safety coefficients such as colliery, improve local Air quality.The methane marketization is the new period mankind's a wise selection, for consolidating economic growth, promote energy security, improving environment and reduce greenhouse gas emission, is all a thing being highly profitable.In prior art, for film, carry in hydrogen tail gas and do not carry out a well recycling, the methane recovery operation of especially carrying in hydrogen tail gas for film does not have an effective way.
Utility model content
The technical problem that the utility model solves is to provide the device that a kind of tail gas recycle is prepared natural gas liquids, can in tail gas, reclaim and prepare the method for natural gas liquids, can effectively improve the conservation measures of enterprise, reduce the resource consumption of enterprise, improve the comprehensive utilization of energy of enterprise.
For solving the problems of the technologies described above, the utility model provides a kind of tail gas recycle to prepare the device of natural gas liquids, it is characterized in that; Comprise unstripped gas purification unit, refrigerant compression unit, liquefaction unit, LNG storage element, diffuse unit; Wherein,
Unstripped gas purification unit, for unstripped gas is carried out to cleansing operation, and flows to liquefaction unit by purified gas and carries out Operation for liquefaction; Wherein, described unstripped gas purification process adopts drying tower and strainer to realize; After described unstripped gas drying tower, remove H
2o enters Operation for liquefaction after filter carries out dust pre-treatment;
Refrigerant compression unit, for nitrogen is carried out to supercharging cooling operation, and is delivered to liquefaction unit by the cryogenic gas after swell refrigeration; Wherein, described refrigerant compression operation adopts compressor, water cooler and surge tank to realize; Described nitrogen, after nitrogen buffer tank carries out buffer operation, enters compressor and carries out boost operations, enters water cooler and carry out cooling operation after boost operations completes, and coldly goes the cryogenic gas after operation to be delivered to Operation for liquefaction and to use as refrigeration agent;
Liquefaction unit, for receiving from the unstripped gas of cleansing operation with from the cryogenic gas of squeeze operation; Control unstripped gas and after cryogenic gas is cooling, carry out lock out operation, and the LNG of separation place is flowed to storing operation; Wherein, described Operation for liquefaction adopts interchanger, knockout drum and rectifying tower to realize; Described unstripped gas carries out cooling operation under the effect of described cryogenic gas, and entering knockout drum after cooling carries out lock out operation, and the gas of sub-department enters after rectifying tower from tower top output hydrogen and nitrogen, from output LNG product at the bottom of tower and flow to storing operation;
LNG storage element, for storing the LNG of Operation for liquefaction output to reclaim;
Diffuse unit, for the exhaust gas centralized high and medium discharge that Operation for liquefaction is produced;
Wherein, described unstripped gas purification process, refrigerant compression operation, Operation for liquefaction, LNG storing operation and diffuse control mode that operation adopts for controlling on the spot the control mode combining with Central Control Room Long-distance Control, Central Control Room is controlled employing DCS Controlling System; Wherein, measurement and red-tape operati, the operation of stopping in emergency are all carried out in described Central Control Room; Device parameter and running state parameter show in Central Control Room DCS display unit, go forward side by side line item and corresponding alarm operation; The operation of device start that described operation relates to is carried out with control mode on the spot.
The utility model technique scheme has following beneficial features:
The utility model can reclaim and prepare the method for natural gas liquids by technique scheme in tail gas, can effectively improve the conservation measures of enterprise, reduces the resource consumption of enterprise, improves the comprehensive utilization of energy of enterprise; By CH in the final LNG obtaining of technique scheme
4purity:>=98% (V/V).
The application's further feature and advantage will be set forth in the following description, and, partly from specification sheets, become apparent, or understand by implementing the application.The application's object and other advantages can be realized and be obtained by specifically noted structure in specification sheets, claims and accompanying drawing.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model embodiment.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, hereinafter will be elaborated to embodiment of the present utility model.It should be noted that, in the situation that not conflicting, the embodiment in the application and the feature in embodiment be arbitrary combination mutually.
The device that the utility model provides a kind of tail gas recycle to prepare natural gas liquids, comprises unstripped gas purification process, refrigerant compression operation, Operation for liquefaction, LNG storing operation, diffuses operation; Wherein,
Unstripped gas purification process, for unstripped gas is carried out to cleansing operation, and flows to liquefaction unit by purified gas and carries out Operation for liquefaction;
Refrigerant compression operation, for nitrogen is carried out to supercharging cooling operation, and is delivered to liquefaction unit by the cryogenic gas after swell refrigeration;
Operation for liquefaction, for receiving from the unstripped gas of cleansing operation with from the cryogenic gas of squeeze operation; Control unstripped gas and after cryogenic gas is cooling, carry out lock out operation, and the LNG of separation place is flowed to storing operation;
LNG storing operation, for storing the LNG of Operation for liquefaction output to reclaim;
Diffuse operation, for the exhaust gas centralized high and medium discharge that Operation for liquefaction is produced;
Wherein, the control mode that the aforesaid method that the utility model provides adopts in actually operating is for controlling on the spot the control mode combining with Central Control Room Long-distance Control, and Central Control Room is controlled and adopted DCS Controlling System.
Measurement and red-tape operati in above-mentioned each operation that the utility model provides are all carried out in Central Control Room, and the operation of stopping in emergency is also carried out in Central Control Room; The device parameter that each operating unit relates to and running state parameter show in Central Control Room DCS display unit, go forward side by side line item and corresponding alarm operation.Wherein, the device start of unit carries out with control mode on the spot, carries out at the scene start-up operation.
Accordingly, the device that the utility model provides a kind of tail gas recycle to prepare natural gas liquids, as shown in Figure 1, comprises unstripped gas purification unit, refrigerant compression unit, liquefaction unit, LNG storage element, diffuses unit; Wherein,
Unstripped gas purification unit, for unstripped gas is carried out to cleansing operation, and flows to liquefaction unit by purified gas and carries out liquefaction unit;
Refrigerant compression unit, for nitrogen is carried out to supercharging cooling operation, and is delivered to liquefaction unit by the cryogenic gas after swell refrigeration;
Liquefaction unit, for receiving from the unstripped gas of clean unit with from the cryogenic gas of compressed element; Control unstripped gas and after cryogenic gas is cooling, carry out lock out operation, and the LNG of separation place is flowed to storage element;
LNG storage element, for storing the LNG of liquefaction unit output to reclaim;
Diffuse unit, for the exhaust gas centralized high and medium discharge that liquefaction unit is produced;
Wherein, the control mode that the aforesaid method that the utility model provides adopts in actual cell is for controlling on the spot the control mode combining with Central Control Room Long-distance Control, and Central Control Room is controlled and adopted DCS Controlling System.
Measurement and red-tape operati in the above-mentioned unit that the utility model provides are all carried out in Central Control Room, and the operation of stopping in emergency is also carried out in Central Control Room; The device parameter that unit relates to and running state parameter show in Central Control Room DCS display unit, go forward side by side line item and corresponding alarm operation.Wherein, the device start of unit carries out with control mode on the spot, carries out at the scene device start operation.
In concrete operations, the technique scheme technical process that the utility model provides specifically describes as follows:
This project adopts proposes to being rich in the film of CH4 the technical process that hydrogen tail gas is purified and developed, and adopts nitrogen expanding refrigeration liquefaction technology, low-temperature fractionating tower isolation technique to produce highly purified LNG product.
Refrigeration system adopts single loop refrigeration technique.Refrigeration cycle technical process adopts nitrogen expansion refrigeration.Nitrogen, when compressor supercharging is cooled to 0.8MPaG, temperature to be 40 ℃, then enters ice chest and is cooled to-140 ℃, then enters after decompressor swell refrigeration obtains-185 ℃ of cryogenic gases and returns to liquefaction ice chest, precooling unstripped gas, liquefied methane.
In concrete operations, the processing unit and the corresponding operating that relate to are described below:
1, unstripped gas purification unit and unstripped gas purification process; First unstripped gas enters in molecular sieve dehydration drying installation and meets after decontamination index requires and enter liquefaction unit; It is as follows that unstripped gas purification unit relates to equipment:
1) drying tower; Drying tower is mainly used to adsorb the micro-H20 in unstripped gas, prevents that H20 from stopping up plate-fin heat exchanger in low temperature process process.
Drying tower technical parameter is as follows:
Quantity: 2
Pattern: vertical
Working medium: unstripped gas
Operating pressure: 3.8MPaG
Working temperature: 35 ℃
Sorbent material pattern: 4A molecular sieve
Work period: 8h
Material: Q345R
Size: φ 1000 * 3000
2) resurgent gases well heater; Resurgent gases well heater is used for the gas that thermal regeneration molecular sieve is used.
Resurgent gases well heater technical parameter is as follows:
Quantity: 1
Tube side medium: the warm steam of office
Tube side inlet temperature: press saturation steam in 2.5MPaG
Tube side temperature out: condensed steam
Shell side medium: resurgent gases (rich nitrogen)
Operating pressure: 0.07MPaG
Shell side inlet temperature: 40 ℃
Temperature out: 240 ℃
Material: Q345R
3) line strainer; Strainer is mainly used to filter the molecular sieve dust in preprocessing process; Prevent from entering aluminum plate-fin heat exchanger, stop up cyrogenic equipment.
Filter technology parameter is as follows:
Quantity: 2
Pattern: vertical
Working medium: unstripped gas
Operating pressure: 3.8MPaG
Working temperature: 40 ℃
Filtering accuracy: 0.125mm
2, refrigerant compression unit and refrigerant compression operation; For nitrogen is carried out to supercharging cooling operation, and be delivered to Operation for liquefaction by the cryogenic gas after swell refrigeration; Squeeze operation can comprise compressor, water cooler and surge tank; Nitrogen, after nitrogen buffer tank carries out buffer operation, enters compressor and carries out boost operations, enters water cooler and carry out cooling operation after boost operations completes, and coldly goes the cryogenic gas after operation to be delivered to Operation for liquefaction and to use as refrigeration agent.
Preferably, in concrete operations, refrigerant compression operation is comprised of single loop nitrogen compressor, watercooler and nitrogen buffer tank.Low-pressure nitrogen from ice chest interchanger enters nitrogen buffer tank, then enters nitrogen compressor and boosts to 0.8MPaG, then enters watercooler cooling, goes out that watercooler is laggard enters ice chest precooling, then enters expander refrigeration end.Mix refrigerant enters refrigeration agent surge tank, then enters refrigeration agent and presses.
Wherein, refrigerant compression unit key equipment is that nitrogen compressor, its technical parameter are as follows:
Quantity: 1
Air input: 18000Nm3/h
Intake pressure (gauge pressure): 0.2MPaG
Inlet air temperature: 36.4 ℃
Medium: nitrogen
Top hole pressure (gauge pressure): 0.8MpaG
Temperature out :≤40 ℃
Shaft power: 1750kW
3, liquefaction unit and Operation for liquefaction; For receiving from the unstripped gas of cleansing operation unit with from the cryogenic gas of squeeze operation; Control unstripped gas and after cryogenic gas is cooling, carry out lock out operation, and the LNG of separation place is flowed to LNG storing operation.
Liquefaction unit can adopt liquefaction ice chest, and wherein, liquefaction ice chest is comprised of equipment such as plate-fin heat exchanger, rectifying tower, knockout drums.Unstripped gas is cooled to-160 ℃ in ice chest, and throttling flash separation goes out the laggard low-temperature fractionating tower T1301 of entering of gas.Tower top is isolated all hydrogen and nitrogen, from the LNG product of producing at the bottom of tower.
The technical parameter of liquefaction ice chest is as follows:
Quantity: 1
Physical dimension: 4 * 4 * 20m*m*m
Insulation pattern: pearlife
Heat-preserving range: wing interchanger, flash tank, rectifying tower etc.
4, LNG storage element and LNG storing operation; For the LNG of Operation for liquefaction output is stored and is reclaimed.Wherein, this project adopts LNG primary and secondary tank stores with pressure, and tank volume is 300m3, can meet the storage needs of 4 days full load LNG products.
LNG storage tank technical parameter is as follows:
Quantity: 1
Pattern: vertical
Working medium: LNG
Operating pressure: 0.3MPaG
Working temperature :-160 ℃
Design pressure: 0.5MPaG
Design temperature :-196 ℃
5, diffuse unit and diffuse operation; Waste gas cloud diffusing tower from the safety valve discharge in liquefaction unit is concentrated high altitude discharge; Diffuse unit and can comprise diffusing tower.
Diffusing tower technical parameter is as follows:
Diffuse medium: normal-temperature natural-gas
Designing and arranging is high-volume: 6000m3/h
Bleeder inlet pressure: 6-12kPa
Vapor pressure: 0.2-0.4MPa
Caliber interface: DN50
Power Level: AC220/50Hz
Diffuse height :～40m
Earthquake intensity: 7 degree
6, control unit and red-tape operati; Preferably, the above-mentioned unit in the utility model adopts and controls on the spot the control mode combining with Central Control Room Long-distance Control; Wherein, Central Control Room is controlled and is adopted DCS Controlling System.
Measurement and red-tape operati in the above-mentioned unit that the utility model provides are all carried out in Central Control Room, and the operation of stopping in emergency is also carried out in Central Control Room; The device parameter of unit and running state parameter show in Central Control Room DCS display unit, go forward side by side line item and corresponding alarm operation.Wherein, the device start of unit carries out with control mode on the spot, carries out at the scene start-up operation.
The final LNG technical parameter obtaining of technique scheme providing by the utility model is as follows:
CH in LNG
4purity:>=98% (V/V) volume ratio;
LNG flow: 1313.9Nm3/h;
LNG temperature :-160 ℃;
LNG pressure: 0.2MpaA.
CH in the LNG natural gas liquids that the technique scheme providing by the utility model finally obtains
4purity higher than the CH of preparation of the prior art
4purity; Easy to spread and implement.
Although the disclosed embodiment of the utility model as above, the embodiment that described content just adopts for the ease of understanding the utility model, not in order to limit the utility model.Technician under any the utility model in technical field; do not departing under the prerequisite of the disclosed spirit and scope of the utility model; can do any modification and variation what implement in form and in details; but scope of patent protection of the present utility model, still must be as the criterion with the scope that appending claims was defined.
Claims (1)
1. tail gas recycle is prepared a device for natural gas liquids, it is characterized in that; Comprise unstripped gas purification unit, refrigerant compression unit, liquefaction unit, LNG storage element, diffuse unit; Wherein,
Unstripped gas purification unit, for unstripped gas is carried out to cleansing operation, and flows to liquefaction unit by purified gas and carries out Operation for liquefaction; Wherein, described unstripped gas purification process adopts drying tower and strainer to realize; After described unstripped gas drying tower, remove H
2o enters Operation for liquefaction after filter carries out dust pre-treatment;
Refrigerant compression unit, for nitrogen is carried out to supercharging cooling operation, and is delivered to liquefaction unit by the cryogenic gas after swell refrigeration; Wherein, described refrigerant compression operation adopts compressor, water cooler and surge tank to realize; Described nitrogen, after nitrogen buffer tank carries out buffer operation, enters compressor and carries out boost operations, enters water cooler and carry out cooling operation after boost operations completes, and coldly goes the cryogenic gas after operation to be delivered to Operation for liquefaction and to use as refrigeration agent;
Liquefaction unit, for receiving from the unstripped gas of cleansing operation with from the cryogenic gas of squeeze operation; Control unstripped gas and after cryogenic gas is cooling, carry out lock out operation, and the LNG of separation place is flowed to storing operation; Wherein, described Operation for liquefaction adopts interchanger, knockout drum and rectifying tower to realize; Described unstripped gas carries out cooling operation under the effect of described cryogenic gas, and entering knockout drum after cooling carries out lock out operation, and the gas of sub-department enters after rectifying tower from tower top output hydrogen and nitrogen, from output LNG product at the bottom of tower and flow to storing operation;
LNG storage element, for storing the LNG of Operation for liquefaction output to reclaim;
Diffuse unit, for the exhaust gas centralized high and medium discharge that Operation for liquefaction is produced;
Wherein, described unstripped gas purification unit, refrigerant compression unit, liquefaction unit, LNG storage element and diffuse control mode that unit adopts for controlling on the spot the control mode combining with Central Control Room Long-distance Control, Central Control Room is controlled employing DCS Controlling System; Wherein, measurement and red-tape operati, the operation of stopping in emergency are all carried out in described Central Control Room; Device parameter and running state parameter show in Central Control Room DCS display unit, go forward side by side line item and corresponding alarm operation; The operation of device start that described operating unit relates to is carried out with control mode on the spot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320623882.8U CN203487118U (en) | 2013-09-21 | 2013-09-21 | Device for recovering tail gas to prepare liquefied natural gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320623882.8U CN203487118U (en) | 2013-09-21 | 2013-09-21 | Device for recovering tail gas to prepare liquefied natural gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203487118U true CN203487118U (en) | 2014-03-19 |
Family
ID=50257963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320623882.8U Expired - Fee Related CN203487118U (en) | 2013-09-21 | 2013-09-21 | Device for recovering tail gas to prepare liquefied natural gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203487118U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104961097A (en) * | 2015-07-16 | 2015-10-07 | 浙江海天气体有限公司 | DCS (distributed control system) automatic control hydrogen purification system |
| CN105084314A (en) * | 2014-05-14 | 2015-11-25 | 新疆宜化化工有限公司 | Synthetic ammonia tail gas recovery and treatment process |
| CN108266963A (en) * | 2018-01-16 | 2018-07-10 | 中科睿凌江苏低温设备有限公司 | A kind of tail gas recycle prepares the device of liquefied natural gas |
-
2013
- 2013-09-21 CN CN201320623882.8U patent/CN203487118U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105084314A (en) * | 2014-05-14 | 2015-11-25 | 新疆宜化化工有限公司 | Synthetic ammonia tail gas recovery and treatment process |
| CN105084314B (en) * | 2014-05-14 | 2017-07-07 | 新疆宜化化工有限公司 | A kind of synthetic ammonia tailgas recovery processing technique |
| CN104961097A (en) * | 2015-07-16 | 2015-10-07 | 浙江海天气体有限公司 | DCS (distributed control system) automatic control hydrogen purification system |
| CN104961097B (en) * | 2015-07-16 | 2017-03-08 | 浙江海天气体有限公司 | DCS automatically controls hydrogen purification system |
| CN108266963A (en) * | 2018-01-16 | 2018-07-10 | 中科睿凌江苏低温设备有限公司 | A kind of tail gas recycle prepares the device of liquefied natural gas |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105865149B (en) | A method of producing liquid air using cold energy of liquefied natural gas | |
| CN204301358U (en) | Phase change cold-storage formula LNG cold energy utilization device | |
| CN103363778B (en) | Minitype skid-mounted single-level mixed refrigerant natural gas liquefaction system and method thereof | |
| CN102538398A (en) | Process and system for purifying, separating and liquefying nitrogen-and-oxygen-containing coal mine methane (CMM) | |
| CN101858683A (en) | System for producing liquefied natural gas by utilizing liquid nitrogen cold energy | |
| CN103175381A (en) | Process for preparing liquefied natural gas (LNG) by low concentration coal bed methane oxygen bearing copious cooling liquefaction | |
| CN203487118U (en) | Device for recovering tail gas to prepare liquefied natural gas | |
| CN103925771A (en) | Process for manufacturing methane | |
| CN102435045A (en) | Liquid nitrogen washing purified synthetic gas and device for cryogenically separating and recovering LNG (liquefied natural gas) thereof | |
| CN201945138U (en) | Separating and recovering device for argon and methane from exhausted gases from synthesis ammonia | |
| CN202382517U (en) | Cryogenic separation system of using coke-oven gas to produce liquefied natural gas | |
| CN203489577U (en) | Preparation system for methane | |
| CN204477679U (en) | A kind of LNG warehouse BOG recycling system | |
| CN102653692A (en) | Method for preparing liquefied natural gas from coke oven gas | |
| CN103175380A (en) | Device for preparing liquefied natural gas (LNG) by low condensation coal bed methane oxygen bearing copious cooling liquefaction | |
| CN203489578U (en) | Device for recycling methane in membrane hydrogen extraction tail gas | |
| CN202382518U (en) | Device for washing and purifying synthesis gas with liquid nitrogen and cryogenically separating and recovering LNG (liquefied natural gas) | |
| CN110185506B (en) | Pressure energy comprehensive utilization system of natural gas pressure regulating station | |
| CN103940198A (en) | Method for recovering tail gas and preparing liquefied natural gas | |
| CN202246578U (en) | Composite refrigerant refrigerated light secondary-dealkylation hydrocarbon recovering device | |
| CN201844655U (en) | Oxygen-containing coal bed methane liquefaction separation device | |
| CN204693949U (en) | A kind of separation high methane gas device with n-formyl sarcolysine alkane refrigerating function | |
| CN105987579B (en) | The method for producing compressed natural gas and liquefied natural gas simultaneously from methane mixed gas | |
| CN104194853B (en) | The device of the coalbed methane containing oxygen synthesis LNG of a kind of methane content 15-40% and technique | |
| CN110487023B (en) | Method for producing liquid nitrogen by utilizing LNG cold energy |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140319 Termination date: 20180921 |