CN205174337U - Use boiler system of low heat value gas - Google Patents
Use boiler system of low heat value gas Download PDFInfo
- Publication number
- CN205174337U CN205174337U CN201520932551.1U CN201520932551U CN205174337U CN 205174337 U CN205174337 U CN 205174337U CN 201520932551 U CN201520932551 U CN 201520932551U CN 205174337 U CN205174337 U CN 205174337U
- Authority
- CN
- China
- Prior art keywords
- gas
- low heat
- heat value
- fuel gas
- combustion
- 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
Abstract
The utility model belongs to the technical field of burning and boiler, a use boiler system of low heat value gas is related to to calorific value 600Kcalm3~1000Kcalm3's low heat value gas is as fuel, its characterized in that: set up adiabatic combustion chamber, do not have boiler heating surface around the adiabatic combustion chamber, adopt refractory castable to reduce the heat dissipation of adiabatic combustion chamber, for low calorific value fuel is stable, complete combustion provides conditions such as space, temperature and dwell time, annulus between combustion chamber casing and the refractory castable is the combustion air passageway, and a small amount of heat that refractory castable scatters and disappears is absorbed by combustion air, improves the combustion air temperature, reduces heat dissipation simultaneously, set up the heat -transfer surface area according to low heat value gas combustion result temperature, the more ordinary boiler of radiation heat transfer face reduces the more ordinary boiler of 40%~60%, heat convection face increase by 10%~30%. The utility model discloses effectively solved low heat value technology tail gas the reduction of discharging, utilize the problem, and have the high and running cost low grade advantage of hot recovery efficiency.
Description
Technical field
The utility model belongs to field of combustion technology and boiler technology field, relates to a kind of steam generator system using fuel gas with low heat value, with calorific value 600Kcal/m
3~ 1000Kcal/m
3fuel gas with low heat value as fuel, ensure that fuel gas with low heat value is stable by arranging recuperator and insulated combustion chamber, burn completely, make boiler produce hot water or steam.This technology is applicable to using blast furnace gas, refinery tail-gas, oil shale oil-refining tail gas, prepares the boiler of the various low-BTU gas such as active carbon tail gas as fuel.
Background technology
The industry such as petrochemical industry, metallurgy, pharmacy produces a large amount of low heat value process tail gas aborning, as blast furnace gas, refinery tail-gas, oil shale oil-refining tail gas, prepares active carbon tail gas etc.These process tail gas low heat values are usually at 600Kcal/m
3~ 1000Kcal/m
3, be difficult to continuous, smooth combustion under field conditions (factors), in therefore utilizing, have certain risk.If directly discharged, not only waste energy but also contaminated environment.Current Application way has other fuel of blending to improve calorific value or high heat value gas companion burns; These methods will consume a large amount of high-grade fuel while utilizing fuel gas with low heat value, and what limit fuel gas with low heat value utilizes scope, utilize that the cost of fuel gas with low heat value improves simultaneously, economic benefit reduces.
Summary of the invention
The purpose of this utility model is: provide a kind of steam generator system using fuel gas with low heat value, with calorific value 600Kcal/m
3~ 1000Kcal/m
3fuel gas with low heat value as fuel, realize fuel gas with low heat value stable, burn completely, make boiler produce hot water or steam.
In order to overcome the shortcoming and defect of prior art, the technical scheme that the utility model adopts for its technical problem of solution is: a kind of steam generator system using fuel gas with low heat value, comprise: fuel gas with low heat value control valve, oxygen concentration sensor, combustable gas concentration sensor, high heating value gas control valve, low heat value gas combustion burner, ultraviolet flame checking unit, burning chamber shell, airstrainer, swirl vane, insulated combustion chamber, castable refractory, boiler body, boiler body heat-insulation layer, radiation heat transfer face, heat convection face, air-introduced machine, air-introduced machine frequency-variable controller, chimney, it is characterized in that:
Fuel gas with low heat value, high heating value combustion gas are connected with low heat value gas combustion burner respectively by fuel gas with low heat value control valve, high heating value gas control valve, the pipeline between fuel gas with low heat value control valve and low heat value gas combustion burner are also provided with oxygen concentration sensor and combustable gas concentration sensor; When low heat value gas combustion burner starts, need a small amount of high heating value combustion gas of first burning, preheating is carried out to insulated combustion chamber, after fuel gas with low heat value flameholding, close high heating value gas control valve;
Low heat value gas combustion burner is arranged on burning chamber shell head, and burning chamber shell head is also provided with ultraviolet flame checking unit, in order to detect combustion position; Combustion air enters from burning chamber shell top, and porch is provided with airstrainer, avoids impurity to enter combustion chamber; Cylindrical shape castable refractory thermal insulation layer is installed, castable refractory insulation thickness B in burning chamber shell; Annulus between burning chamber shell and castable refractory is combustion air passage, and annulus width is D; Annulus is provided with swirl vane near head position; Be insulated combustion chamber in the middle part of castable refractory, insulated combustion chamber cross-sectional area is A, and length is L;
Burning chamber shell is connected with boiler body front portion; The high-temperature flue gas that fuel gas with low heat value burning produces enters boiler body, the water that heating boiler body contents is received, boiler develops steam vapor or hot water; Boiler body rear portion is connected with chimney by air-introduced machine, and air-introduced machine is extracted low-temperature flue gas out and discharged from chimney; Air-introduced machine electrical connection air-introduced machine frequency-variable controller, air-introduced machine rotating speed is regulated by air-introduced machine frequency-variable controller, thus regulates combustion air flow; Boiler body outer wall arranges boiler body heat-insulation layer, reduces radiation loss;
Radiation heat transfer face and heat convection face are set in boiler body.
High heating value combustion gas can be natural gas or liquefied petroleum gas.
10 ° ~ 35 °, swirl vane angle of inclination, makes combustion air produce tangential flow velocity, thus forms backflow flame stabilizing zone at insulated combustion chamber, enhanced burning stability.
According to fuel gas with low heat value combustion product temperature and composition, radiation heat transfer face area comparatively regular fuel, gas fired-boiler reduces 40% ~ 60%, is 4.6m
2/ MW ~ 6.1m
2/ MW; Heat convection face area comparatively regular fuel, gas fired-boiler increases by 10% ~ 30%, is 23.7m
2/ MW ~ 27.9m
2/ MW.
The determination of castable refractory insulation thickness B should follow B=C
1λ H
0.5, wherein C
1for constant span is 0.095 ~ 0.112; The determination of the annulus width D between burning chamber shell and cylindrical shape castable refractory should follow D=C
2α
0.5p
0.5/ H
0.5, wherein C
2for constant span is 0.034 ~ 0.041; The determination of insulated combustion chamber cross-sectional area A should follow A=C
3α P/H, wherein C
3for constant span is 0.32 ~ 0.45; The determination of insulated combustion chamber length L should follow L=C
4h/ α, wherein C
4for constant span is 1.56 ~ 1.92; With in above formula, λ is the thermal conductivity factor of castable refractory, unit W/ (mK); α is theoretical air coefficient (i.e. unit volume low calorie fuels burn completely required minimum volume of air), unit m
3/ m
3; P is boiler rated capacity, unit MW; H is the low-burning calorific value of low calorie fuels, unit MJ/m
3.
A kind of steam generator system using fuel gas with low heat value of the present utility model, its innovative point is: 1, arrange insulated combustion chamber, boiler heating surface is not had around insulated combustion chamber, castable refractory is adopted to reduce the heat radiation of insulated combustion chamber further, for low calorie fuels is stable, burn provides the conditions such as space, temperature and the time of staying completely, thus realize continuous, the smooth combustion of fuel gas with low heat value as sole fuel; 2, the gap between burning chamber shell and cylindrical shape castable refractory is combustion air passage, and a small amount of heat that castable refractory scatters and disappears is absorbed by combustion air, improves combustion air temperature, reduces radiation loss simultaneously; 3, arrange heat-transfer surface area according to fuel gas with low heat value combustion product temperature and composition, radiation heat transfer face area comparatively regular fuel, gas fired-boiler reduces 40% ~ 60%, is 4.6m
2/ MW ~ 6.1m
2/ MW; Heat convection face area comparatively regular fuel, gas fired-boiler increases by 10% ~ 30%, is 23.7m
2/ MW ~ 27.9m
2/ MW.
The utility model is owing to taking above technical scheme, it has the following advantages: the steam generator system 1, using fuel gas with low heat value under natural conditions cannot the low heat value process tail gas of smooth combustion as fuel, reclaim, utilize mass energy, simultaneously for the process of solution low heat value process tail gas, reduction of discharging problem provide a kind of technical scheme; 2, adopt outside insulated combustion chamber and arrange air duct and hydrocyclone structure, combustion chamber wall surface heat radiation is all absorbed by combustion air, improves the thermal efficiency while improving combustion stability; 3, according to low heat value process tail gas combustion product gases parameter adjustment boiler heat exchange face, boiler thermal output improves, cost reduces; 4, steam generator system negative pressure is run, and avoids flammable and detrimental processes tail gas leakage, ensures security of operation.
Accompanying drawing explanation
Fig. 1 is the systematic schematic diagram of the utility model embodiment.
Fig. 2 is the chamber structure figure of the utility model embodiment.
Wherein, fuel gas with low heat value control valve (1), oxygen concentration sensor (2), combustable gas concentration sensor (3), high heating value gas control valve (4), low heat value gas combustion burner (5), ultraviolet flame checking unit (6), burning chamber shell (7), airstrainer (8), swirl vane (9), castable refractory (10), insulated combustion chamber (11), boiler body (12), boiler body heat-insulation layer (13), radiation heat transfer face (14), heat convection face (15), air-introduced machine (16), air-introduced machine frequency-variable controller (17), chimney (18).
Detailed description of the invention
For making the purpose of this utility model, technical scheme and advantage clearly understand, to develop simultaneously embodiment referring to accompanying drawing, the utility model is further described.
Fig. 1, Fig. 2 are a kind of embodiment of the present utility model.Use the steam generator system of fuel gas with low heat value, comprising: fuel gas with low heat value control valve 1, oxygen concentration sensor 2, combustable gas concentration sensor 3, high heating value gas control valve 4, low heat value gas combustion burner 5, ultraviolet flame checking unit 6, burning chamber shell 7, airstrainer 8, swirl vane 9, castable refractory 10, insulated combustion chamber 11, boiler body 12, boiler body heat-insulation layer 13, radiation heat transfer face 14, heat convection face 15, air-introduced machine 16, air-introduced machine frequency-variable controller 17 and chimney 18.
Fuel gas with low heat value is connected with the fuel gas with low heat value import of low heat value gas combustion burner 5 by fuel gas with low heat value control valve 1, the pipeline between fuel gas with low heat value control valve 1 and low heat value gas combustion burner 5 is also provided with oxygen concentration sensor 2 and combustable gas concentration sensor 3; High heating value combustion gas is connected with the high heating value fuel gas inlet of low heat value gas combustion burner 5 by high heating value gas control valve 4.Fuel gas with low heat value control valve 1 is for fast shut-off and regulate fuel gas with low heat value flow; Oxygen concentration sensor 2 for detecting the oxygen concentration in fuel gas with low heat value, when oxygen concentration higher than 2% time should cut off fuel gas with low heat value control valve 1; Combustable gas concentration sensor 3 is for detecting the combustable gas concentration in fuel gas with low heat value.High heating value gas control valve 4 is for fast shut-off and regulate high heating value gas flow; When low heat value gas combustion burner 5 starts, need a small amount of high heating value combustion gas of first burning, preheating is carried out to insulated combustion chamber; High heating value combustion gas can use natural gas, liquefied petroleum gas etc.; After fuel gas with low heat value flameholding, close high heating value gas control valve 4.
Low heat value gas combustion burner 5 is arranged on burning chamber shell 7 head; Burning chamber shell 7 head is also provided with ultraviolet flame checking unit 6, in order to detect combustion position; Combustion air enters from burning chamber shell 7 top, and porch is provided with airstrainer 8, avoids impurity to enter combustion chamber.Cylindrical shape castable refractory 10 thermal insulation layer is installed in burning chamber shell 7; Castable refractory 10 insulation thickness B.Annulus between burning chamber shell 7 and cylindrical shape castable refractory 10 is combustion air passage, and annulus width is D; Annulus is provided with swirl vane 9 near head position, and swirl vane 9 is obliquely installed along gas flow direction, 10 ° ~ 35 °, swirl vane 9 angle of inclination.Be insulated combustion chamber 11 in the middle part of castable refractory 10, insulated combustion chamber 11 cross-sectional area is A, and length is L.The effect of castable refractory 10 is the heat radiations reducing insulated combustion chamber 11, for low calorie fuels is stable, burn provides the conditions such as space, temperature and the time of staying completely; Castable refractory 10, simultaneously also as the heat-transfer surface of recuperator, makes the combustion air flowing through castable refractory 10 outside obtain preheating, improves combustion stability.Swirl vane 9 produces tangential flow velocity for making combustion air, thus forms backflow flame stabilizing zone at insulated combustion chamber 11, enhanced burning stability.
The determination of castable refractory 10 insulation thickness B should follow B=C
1λ H
0.5, wherein C
1for constant span is 0.095 ~ 0.112; The determination of the annulus width D between burning chamber shell 7 and cylindrical shape castable refractory 10 should follow D=C
2α
0.5p
0.5/ H
0.5, wherein C
2for constant span is 0.034 ~ 0.041.The determination of insulated combustion chamber 11 cross-sectional area A should follow A=C
3α P/H, wherein C
3for constant span is 0.32 ~ 0.45; The determination of insulated combustion chamber 11 length L should follow L=C
4h/ α, wherein C
4for constant span is 1.56 ~ 1.92.With in above formula, λ is the thermal conductivity factor of castable refractory, unit W/ (mK); α is theoretical air coefficient (i.e. unit volume low calorie fuels burn completely required minimum volume of air), unit m
3/ m
3; P is boiler rated capacity, unit MW; H is the low-burning calorific value of low calorie fuels, unit MJ/m
3.
Burning chamber shell 7 is connected with boiler body 12 front portion; Be provided with cooling water inlet bottom boiler body, top is provided with hot water outlet; The high-temperature flue gas that fuel gas with low heat value burning produces enters boiler body 12, the water held in heating boiler body 12, boiler develops steam vapor or hot water; Boiler body 12 rear portion is connected with chimney 18 by air-introduced machine 16, and air-introduced machine is extracted low-temperature flue gas out and discharged from chimney 18; Air-introduced machine 16 rotating speed is regulated by air-introduced machine frequency-variable controller 17, thus regulates combustion air flow; Boiler body 12 outer wall arranges boiler body adiabator layer 13, reduces radiation loss.
In the boiler body 12 using fuel gas with low heat value, radiation heat transfer face 14 and heat convection face 15 are set; According to fuel gas with low heat value combustion product temperature and composition, radiation heat transfer face area comparatively regular fuel, gas fired-boiler reduces 40% ~ 60%, is 4.6m
2/ MW ~ 6.1m
2/ MW; Heat convection face area comparatively regular fuel, gas fired-boiler increases by 10% ~ 30%, is 23.7m
2/ MW ~ 27.9m
2/ MW.
The steam generator system operation principle using fuel gas with low heat value is as follows:
Before starting trouble, should check the registration of oxygen concentration sensor 2 and combustable gas concentration sensor 3, guarantee that oxygen concentration is lower than 2%, combustable gas concentration is in proper range.When using the boiler startup of fuel gas with low heat value, first light high heating value combustion gas, preheating is carried out to insulated combustion chamber 10.After insulated combustion chamber 10 temperature is more than 750 DEG C, can light fuel gas with low heat value, cut off high heating value combustion gas, the boiler startup stage terminates simultaneously.Combustion air enters the interlayer between burning chamber shell 7 and castable refractory 10 by the airstrainer 8 on burning chamber shell 7 top, and combustion air obtains preheating, reduces the radiation loss of burning chamber shell 7 simultaneously; Produce tangential velocity by swirl vane 9 afterwards, enter insulated combustion chamber 11 mixed combustion.Insulated combustion chamber 11 outside is castable refractory 10, can reduce the heat radiation of insulated combustion chamber, for low calorie fuels is stable, burn provides the conditions such as space, temperature and the time of staying completely.
The high-temperature flue gas that fuel gas with low heat value burning produces enters boiler body 12, flows through radiation heat transfer face 14, heat convection face 15 recovered flue gas heat, enters air afterwards through air-introduced machine 16, chimney 18.Because of flue-gas temperature comparatively regular fuel, the gas fired-boiler reduction that fuel gas with low heat value burning produces, radiation heat transfer face 14 area comparatively regular fuel, gas fired-boiler reduces 40% ~ 60%, and heat convection face 15 area comparatively regular fuel, gas fired-boiler increases by 10% ~ 30%.Boiler body 12 outer wall arranges boiler body heat-insulation layer 13, reduces radiation loss.Air-introduced machine 16 rotating speed is controlled, to control the proportioning of combustion air and fuel gas with low heat value in suitable scope by air-introduced machine frequency-variable controller 17.
These are only preferred embodiment of the present utility model, not in order to limit the utility model, all within spirit of the present utility model and principle, any amendment made, equivalent replacement, improvement etc., all should be included within scope of the present utility model.
Claims (9)
1. one kind uses the steam generator system of fuel gas with low heat value, comprise: fuel gas with low heat value control valve, oxygen concentration sensor, combustable gas concentration sensor, high heating value gas control valve, low heat value gas combustion burner, ultraviolet flame checking unit, burning chamber shell, airstrainer, swirl vane, insulated combustion chamber, castable refractory, boiler body, boiler body heat-insulation layer, radiation heat transfer face, heat convection face, air-introduced machine, air-introduced machine frequency-variable controller, chimney, is characterized in that:
Fuel gas with low heat value, high heating value combustion gas are connected with described low heat value gas combustion burner respectively by described fuel gas with low heat value control valve, described high heating value gas control valve, the pipeline between described fuel gas with low heat value control valve and described low heat value gas combustion burner are also provided with described oxygen concentration sensor and described combustable gas concentration sensor;
Described low heat value gas combustion burner is arranged on described burning chamber shell head, and described burning chamber shell head is also provided with described ultraviolet flame checking unit; Combustion air enters from described burning chamber shell top, and porch is provided with described airstrainer; Install castable refractory thermal insulation layer described in cylindrical shape in described burning chamber shell, described castable refractory insulation thickness is B; Annulus between described burning chamber shell and described castable refractory is combustion air passage, and annulus width is D; Annulus is provided with described swirl vane near head position; Be described insulated combustion chamber in the middle part of described castable refractory, described insulated combustion chamber cross-sectional area is A, and length is L;
Described burning chamber shell is connected with described boiler body front portion; The high-temperature flue gas that fuel gas with low heat value burning produces enters described boiler body, heats the water held in described boiler body, produces steam or hot water; Described boiler body rear portion is connected with described chimney by described air-introduced machine, and described air-introduced machine is extracted low-temperature flue gas out and discharged from described chimney; Described air-introduced machine is electrically connected described air-introduced machine frequency-variable controller; Described boiler body outer wall arranges described boiler body heat-insulation layer;
Described radiation heat transfer face and described heat convection face are set in described boiler body.
2. a kind of steam generator system using fuel gas with low heat value as claimed in claim 1, it is characterized in that, high heating value combustion gas is natural gas or liquefied petroleum gas.
3. a kind of steam generator system using fuel gas with low heat value as claimed in claim 1, it is characterized in that, 10 ° ~ 35 °, described swirl vane angle of inclination, makes combustion air produce tangential flow velocity, thus form backflow flame stabilizing zone at described insulated combustion chamber, enhanced burning stability.
4. a kind of steam generator system using fuel gas with low heat value as claimed in claim 1, is characterized in that, according to fuel gas with low heat value combustion product temperature and composition, described radiation heat transfer face area comparatively regular fuel, gas fired-boiler reduces 40% ~ 60%, is 4.6m
2/ MW ~ 6.1m
2/ MW; Described heat convection face area comparatively regular fuel, gas fired-boiler increases by 10% ~ 30%, is 23.7m
2/ MW ~ 27.9m
2/ MW.
5. a kind of steam generator system using fuel gas with low heat value as claimed in claim 1, it is characterized in that, the determination of described castable refractory insulation thickness B should follow B=C
1λ H
0.5, wherein C
1for the thermal conductivity factor of constant span to be 0.095 ~ 0.112, λ be castable refractory, H is the low-burning calorific value of low calorie fuels.
6. a kind of steam generator system using fuel gas with low heat value as claimed in claim 5, it is characterized in that, the determination of the annulus width D between described burning chamber shell and described castable refractory should follow D=C
2α
0.5p
0.5/ H
0.5, wherein C
2be theoretical air coefficient for constant span is 0.034 ~ 0.041, α, P is boiler rated capacity.
7. a kind of steam generator system using fuel gas with low heat value as claimed in claim 6, it is characterized in that, the determination of described insulated combustion chamber cross-sectional area A should follow A=C
3α P/H, wherein C
3for constant span is 0.32 ~ 0.45.
8. a kind of steam generator system using fuel gas with low heat value as claimed in claim 7, it is characterized in that, the determination of described insulated combustion chamber length L should follow L=C
4h/ α, wherein C
4for constant span is 1.56 ~ 1.92.
9. a kind of steam generator system using fuel gas with low heat value as claimed in claim 1, is characterized in that, described oxygen concentration sensor display oxygen concentration higher than 2% time, cut off described fuel gas with low heat value control valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520932551.1U CN205174337U (en) | 2015-11-20 | 2015-11-20 | Use boiler system of low heat value gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520932551.1U CN205174337U (en) | 2015-11-20 | 2015-11-20 | Use boiler system of low heat value gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205174337U true CN205174337U (en) | 2016-04-20 |
Family
ID=55738326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520932551.1U Expired - Fee Related CN205174337U (en) | 2015-11-20 | 2015-11-20 | Use boiler system of low heat value gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205174337U (en) |
-
2015
- 2015-11-20 CN CN201520932551.1U patent/CN205174337U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105258110A (en) | Boiler system adopting burning low-heating-value fuel gas and operation method for boiler system | |
| CN104141952B (en) | Extremely low concentration coal mine gas combustion device and method | |
| CN101586799B (en) | Moderate temperature moderate voltage steam boiler capable of burning down the blast furnace gas | |
| CN202692027U (en) | Petroleum coke powder combustion device for heat injection boiler and heating furnace in oil field | |
| CN203758257U (en) | Under-machine type heat exchanger for double-preheating sintering ignition furnace | |
| CN203010582U (en) | Waste heat dynamic afterburning incinerator | |
| CN104531226A (en) | Biomass gasified combustion heat supply method for industrial kiln stove | |
| CN104456505A (en) | Low-concentration coal-bed methane or methane gas steam boiler | |
| CN202018185U (en) | Combined air furnace system | |
| CN204529765U (en) | A kind of biomass gasification fired heating system for Industrial Stoves | |
| CN205174337U (en) | Use boiler system of low heat value gas | |
| CN107218619B (en) | Boiler capable of utilizing waste heat of flue gas | |
| CN203478310U (en) | Device for preventing grate surface of layer-burning boiler from coking | |
| CN105180653A (en) | Tube heating furnace | |
| CN206176410U (en) | Alcohol takes off water vapor heating system | |
| CN201787725U (en) | Assembled circulating fluidized bed heat carrier boiler | |
| CN103968673A (en) | Waste heat utilization device of tail gas of Serp activation furnace and tail gas utilization method | |
| CN208952075U (en) | A kind of double burner heating furnace | |
| CN203848699U (en) | Waste heat utilization device for Slapple activating oven tail gas | |
| CN105546811B (en) | A kind of energy-conserving steam boiler for dual purpose | |
| CN103225881B (en) | Efficient oxygen-enriched-combmultiple-unit-powderheat multiple-unit-powderheat heat transfer oil boiler system | |
| CN107289783A (en) | Heat the liquefied gas furnace drying method of oven module refractory liner castable | |
| CN106439860B (en) | A kind of dehydration of alcohol steam-heating system | |
| CN104329802A (en) | Condensing boiler | |
| CN205192238U (en) | Pipe type heating furnace |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| 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: 20160420 Termination date: 20171120 |