CN203728790U - Device for pressurizing deacidifying absorbent in natural gas deacidifying procedure - Google Patents
Device for pressurizing deacidifying absorbent in natural gas deacidifying procedure Download PDFInfo
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- CN203728790U CN203728790U CN201320863664.1U CN201320863664U CN203728790U CN 203728790 U CN203728790 U CN 203728790U CN 201320863664 U CN201320863664 U CN 201320863664U CN 203728790 U CN203728790 U CN 203728790U
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- natural gas
- alkanolamine solution
- rich
- deacidifying
- poor
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Abstract
The utility model discloses a device for pressurizing a deacidifying absorbent in a natural gas deacidifying procedure. The device comprises two centrifugal pumps with the same specification, and a hot backup low-flow plunger pump, wherein an ESD system monitors the natural gas deacidifying procedure; logic program for outputting a signal to directly start the plunger pump to run and work when the two centrifugal pumps simultaneously generate faults is arranged in the ESD system; the deacidifying absorbent enters an absorption device to remove an acid gas in natural gas after being pressurized by one of the two centrifugal pumps; the hot backup plunger pump is automatically started through the ESM system remotely to maintain low-load operation of the device when the two centrifugal pumps simultaneously generate faults. The device disclosed by the utility model is especially applicable to a front-end alcohol amine process deacidifying technology of a natural gas liquefying device adopting a mixed cooling flow, an abrupt temperature drop of a cold box, accumulated liquid at the bottom of the cold box or even complete shutdown of the device caused by blocking of the natural gas entering a downstream natural gas liquefying device can be avoided, and unnecessary device drive expense and operating cost are saved.
Description
Technical field
The utility model provides a kind of brand-new Sweet natural gas depickling absorption agent supercharging device, the especially suitable front end hydramine method acid stripping method that is applied to the natural gas liquefaction device that adopts hybrid refrigeration flow process.
Background technology
The attached typical process flow that Figure 1 shows that existing hydramine method depickling technology: the alkanolamine solution that completes regeneration in regenerator column enters in absorption tower and Sweet natural gas counter current contact mass-and heat-transfer after the supercharging of alkanolamine solution pump, acidic components in Sweet natural gas enter alkanolamine solution, and the Sweet natural gas after depickling removes downstream liquefying plant; The alkanolamine solution that has absorbed sour gas goes regenerator column regeneration flash off the hydro carbons wherein dissolving and carry secretly in flash tank after, and the alkanolamine solution of having regenerated again enters absorption tower after the supercharging of alkanolamine solution pump.
For assurance device moves continuously, the most the using and the reserved of alkanolamine solution pump, i.e. in running order another maintenance or for subsequent use.Once two pumps breaks down simultaneously, Sweet natural gas deacidifying device must be stopped, cut off the gas inlet passage of natural gas liquefaction system simultaneously, avoid defective Sweet natural gas to enter natural gas liquefaction device and cause Cold box blocking and freezing.But the natural gas liquefaction device that adopts hybrid refrigeration flow process does not allow to occur the situation of purified natural gas source of the gas blocking-up, because as purified natural gas source is cut off and mix refrigerant continuation cycle operation, there will be ice chest temperature decrease, in short period of time, cause ice chest hydrops, refrigeration agent frozen block, be difficult to be maintained to Sweet natural gas deacidifying device and recover normal, thereby cause comprehensive parking of device.
Utility model content
The purpose of this utility model is to provide a kind of supercharging device of Sweet natural gas depickling absorption agent, proposes a kind of solution for the alkanolamine solution pump existing in the existing hydramine method depickling technology problem that causes ice chest hydrops even to install comprehensive parking that breaks down simultaneously.
Absorption unit and absorption system are used interchangeably in this application.
The utility model provides the device for the supercharging of depickling absorption agent in a kind of Sweet natural gas deacidification process, it is characterized in that: described device comprises the ram pump of two impeller pumps and a hot stand-by duty being manipulated by ESD system, two impeller pumps are connected with an important actor plug parallel connection of pumps, in device course of normal operation in two impeller pumps one is in running order, another maintenance or for subsequent use; Ram pump is in hot stand-by duty; The running of Sweet natural gas deacidification process described in described ESD system monitoring, in the time that two impeller pumps break down simultaneously, output signal directly starts ram pump running work.Device described in the utility model is particularly useful for the front end hydramine method deacidifying process in hybrid refrigeration liquefied natural gas process for Sweet natural gas hydramine method deacidifying process, natural gas liquefaction process.
Preferably two impeller pumps adopt and are arranged symmetrically with, and are identical or different specification, are preferably identical or roughly the same specification.
Described impeller pump is selected application by the flow of the processing requirement in concrete technology flow process, depickling absorption agent, without particular restriction.
Described ram pump flow can be 5m
3/ h～20m
3/ h, preferably 8m
3/ h～15m
3/ h, for example 10m
3/ h.The structure formation of ram pump can be axial plunger pump, can be also radial plunger pump.
Described depickling absorption agent is alkanolamine solution, can be that Sweet natural gas removes the alkanolamine solution that sour gas is conventional for hydramine method, be preferably by 30%～50%, preferably 35～45%(weight percent) activation hydramine and 50%～70%, preferably 55-65%(weight percent) water composition, wherein hydramine is Monoethanolamine MEA BASF (MEA), diethanolamine (DEA), diisopropanolamine (DIPA) (DIPA), N methyldiethanol amine (MDEA), one or more in diglycolamine (DGA), preferably Monoethanolamine MEA BASF (MEA), one or both in N methyldiethanol amine (MDEA) or more kinds of.
In described Sweet natural gas deacidification process, there is ESD system (Emergency Shutdown Device quick stopping mechnism system) monitoring, ESD system is followed according to concrete technology environment and safe class and is required to select application, arranges, but be at least provided with following logical program, in the time that two alkanolamine solution impeller pumps break down simultaneously, ESD system output signal directly starts ram pump running work.
The method of Sweet natural gas depickling absorption agent supercharging device supercharging is: adopt one in normal operating conditions, one in maintenance or the impeller pump of stand-by state and the low discharge ram pump of a hot stand-by duty in parallel be the supercharging of depickling absorption agent, have Sweet natural gas deacidification process described in ESD system monitoring; Depickling absorption agent enters absorption unit and removes the sour gas in Sweet natural gas after the impeller pump supercharging of normal operating conditions wherein, work of two impeller pumps, a maintenance or for subsequent use; In the time that two impeller pumps break down simultaneously, ESD system (Emergency Shutdown Device quick stopping mechnism system) output signal, hot standby ram pump starts automatically, holdout device running, and do not stop.
The volume ratio of described alkanolamine solution sour gas absorbable with it is 1:30～1:60, preferably 1:35～1:55, more preferably 1:40～1:50.
Two impeller pumps in the utility model are standby use mutually, in finger device course of normal operation in two impeller pumps one in running order, another maintenance or for subsequent use.
Sweet natural gas " depickling " operation in the utility model refers to the processing step that removes sour gas in Sweet natural gas.The described Sweet natural gas sour gas removing is the common sour gas of raw natural gas, for example CO
2, H
2s.
According on the other hand of the present utility model, a kind of Sweet natural gas deacidifying device is provided, it comprises: absorption system (as regenerator column), it has the gas outlet end after raw natural gas entrance end, depickling, rich alkanolamine solution exit end, alkanolamine solution entrance end;
Flash tank, it has the rich alkanolamine solution entrance end, rich alkanolamine solution exit end, the flashed vapour exit end that are connected with the exit end of the rich alkanolamine solution of absorption system;
Poor rich liquid heat exchanger, it has the rich alkanolamine solution entrance end that is connected with the rich alkanolamine solution exit end of flash tank and rich alkanolamine solution exit end, poor alkanolamine solution entrance end, poor alkanolamine solution exit end;
Regeneration system rapidly (as regenerator column), exit end, the acid gas exit end of the poor alkanolamine solution that it has the entrance end of the rich alkanolamine solution being connected with the rich alkanolamine solution exit end of poor rich liquid heat exchanger, be connected with the entrance end of the poor alkanolamine solution of poor rich liquid heat exchanger;
Lean solution water cooler, its one end be connected with the poor alkanolamine solution exit end of poor rich liquid heat exchanger, the other end is connected with one end of two impeller pumps of parallel connection and the ram pump of a hot stand-by duty being manipulated by ESD system, two impeller pumps in parallel and the ram pump of a hot stand-by duty being manipulated by the ESD system the other end are separately connected to the alkanolamine solution entrance end of absorption system after converging, wherein, in normal operation, an impeller pump is in running order, another impeller pump maintenance or for subsequent use; In the time that two impeller pumps break down simultaneously, described ESD system (Emergency Shutdown Device quick stopping mechnism system) output signal, hot standby ram pump starts automatically, maintains absorption unit running (preferably low load operation), and does not stop.
In preferred embodiments, two mutual standby impeller pumps adopt and are arranged symmetrically with, and are same size.
Preferably, described ESD system is provided with in the time that two impeller pumps break down simultaneously output signal and directly starts the logical program of ram pump running work.
Advantage of the present utility model:
The suitable front end hydramine method depickling purifying method that is applied to the natural gas liquefaction device that adopts hybrid refrigeration flow process of device described in the utility model, ice chest temperature decrease, the ice chest bottom hydrops that can avoid Sweet natural gas because entering downstream natural gas liquefaction device to block causing even install comprehensive parking, save unnecessary device driving expense and process cost.
Brief description of the drawings
Fig. 1 is a kind of process device figure of prior art;
In figure: 100, purge gas separator; 101, absorption tower; 102, unstripped gas separator; 103, flash tank; 104, alkanolamine solution pump; 105, solution cooler; 106, boosting pump; 107, strainer; 108, poor rich liquid heat exchanger; 109, regenerator column; 110, overhead condenser; 111, backflow holding tank; 112, reboiler; 113, surge tank
Fig. 2 is a kind of process device figure that adopts device described in the utility model.
For example, in figure: 1, absorption system (absorption tower); 2, flash tank; 3, poor rich liquid heat exchanger; 4, regeneration system rapidly (for example regenerator column); 5, lean solution water cooler;
6a/b, impeller pump; 7, ram pump; 10, raw natural gas; 11, rich alkanolamine solution; 12, the Sweet natural gas after depickling;
13, flashed vapour; 14, poor alkanolamine solution; 15, acid gas;
Embodiment
The purpose of this utility model is to provide a kind of supercharging device of Sweet natural gas depickling absorption agent, proposes a kind of solution for the alkanolamine solution pump existing in the existing hydramine method depickling technology problem that causes ice chest hydrops even to install comprehensive parking that breaks down simultaneously.
The purpose of this utility model specifically realizes like this, be that the utility model provides the device for the supercharging of depickling absorption agent in a kind of Sweet natural gas deacidification process, it is characterized in that: described device comprises the ram pump 7 of two impeller pump 6a, 6b and a hot stand-by duty being manipulated by ESD system, two impeller pump 6a, 6b and a ram pump 7 are connected in parallel, in device course of normal operation in two impeller pump 6a, 6b one is in running order, another maintenance or for subsequent use; Ram pump 7 is in hot stand-by duty; The running of Sweet natural gas deacidification process described in described ESD system monitoring, in the time that two impeller pumps break down simultaneously, output signal directly starts ram pump 7 running work.
The utility model further provides a kind of Sweet natural gas deacidifying device, and it comprises: such as absorption tower of absorption system 1(), it has the gas outlet end after raw natural gas entrance end, depickling, rich alkanolamine solution exit end, alkanolamine solution entrance end;
Flash tank 2, it has the rich alkanolamine solution entrance end, rich alkanolamine solution exit end, the flashed vapour exit end that are connected with the exit end of the rich alkanolamine solution of absorption system;
Poor rich liquid heat exchanger 3, it has the rich alkanolamine solution entrance end that is connected with the rich alkanolamine solution exit end of flash tank 2 and rich alkanolamine solution exit end, poor alkanolamine solution entrance end, poor alkanolamine solution exit end;
Such as regenerator column of regeneration system rapidly 4(), exit end, the acid gas exit end of the poor alkanolamine solution that it has the entrance end of the rich alkanolamine solution being connected with the rich alkanolamine solution exit end of poor rich liquid heat exchanger 3, be connected with the entrance end of the poor alkanolamine solution of poor rich liquid heat exchanger 3;
Lean solution water cooler 5, its one end be connected with the poor alkanolamine solution exit end of poor rich liquid heat exchanger 3, the other end is connected with one end of two impeller pump 6a, 6b of parallel connection and the ram pump 7 of a hot stand-by duty being manipulated by ESD system, two impeller pump 6a, 6b in parallel and the other end of ram pump 7 and the alkanolamine solution entrance end of absorption system 1 of a hot stand-by duty being manipulated by ESD system are connected, wherein, in normal operation, an impeller pump is in running order, another impeller pump maintenance or for subsequent use; In the time that two impeller pump 6a and 6b break down simultaneously, described ESD system (Emergency Shutdown Device quick stopping mechnism system) output signal, hot standby ram pump 7 starts automatically, holdout device running (preferably low load operation), and do not stop.
In preferred embodiments, two mutual standby impeller pump 6a, 6b adopt and are arranged symmetrically with, and are same size.
Preferably, described ESD system is provided with in the time that two impeller pump 6a, 6b break down simultaneously output signal and directly starts the turn round logical program of work of ram pump 7.
Method for the device supercharging of depickling absorption agent supercharging in Sweet natural gas deacidification process is: adopts one in normal operating conditions, one in maintenance or the impeller pump of stand-by state and the low discharge ram pump of a hot stand-by duty in parallel be the supercharging of depickling absorption agent, have Sweet natural gas deacidification process described in ESD system monitoring; Depickling absorption agent enters absorption unit and removes the sour gas in Sweet natural gas after the impeller pump supercharging of normal operating conditions, work of two impeller pumps, a maintenance or for subsequent use; In the time that two impeller pumps break down simultaneously, ESD system output signal, the ram pump of hot stand-by duty starts automatically, holdout device running.
Described hydramine method, refers to that alkanolamine solution absorbs Sweet natural gas sour gas (H in absorption tower under cryogenic high pressure as absorption agent
2s, CO
2gas etc.), generate corresponding amine salt and emit heat.The rich solution solution amine salt in solution under low-voltage high-temperature condition in regenerator column that has absorbed acid gas decomposes, and emits solution, makes regeneration of waste liquor, recovery absorb the activity of acid gas, is the processing method that deacidification is carried out continuously.
Described depickling absorption agent is alkanolamine solution, can be that Sweet natural gas removes the alkanolamine solution that sour gas is conventional for hydramine method, be preferably the weight percent by 30%～50%() activation hydramine and 50%～70%(weight percent) water form, wherein hydramine is one or more in Monoethanolamine MEA BASF (MEA), diethanolamine (DEA), diisopropanolamine (DIPA) (DIPA), N methyldiethanol amine (MDEA), diglycolamine (DGA), preferably one or more in Monoethanolamine MEA BASF (MEA), N methyldiethanol amine (MDEA).
Adopt the concrete Sweet natural gas depickling flow process of the utility model device to be:
Contain sour gas (as CO
2, H
2s etc.) raw natural gas enter absorption system, with enter absorption system alkanolamine solution countercurrent mass transfer conduct heat.Alkanolamine solution absorbs the sour gas in raw natural gas, and the Sweet natural gas self-absorption system after depickling is removed the device in downstream; The rich alkanolamine solution that has absorbed sour gas can be introduced into and in flash tank, flash off flashed vapour (flashed vapour is the hydro carbons that dissolves and carry secretly in alkanolamine solution), more directly or for example, after heat exchange (with poor alkanolamine solution through interchanger heat exchange to approximately 90 DEG C～95 DEG C), enter alkanolamine solution regeneration system rapidly rich alkanolamine solution is carried out to low-voltage high-temperature regeneration; Rich alkanolamine solution stripping in regeneration system rapidly goes out the acid gas absorbing in solution, the poor alkanolamine solution that obtains regeneration leaves regeneration system rapidly, through cooling (for example, with rich alkanolamine solution heat exchange cooling, cooling through lean solution water cooler again, to approximately 40 DEG C～45 DEG C) adopt afterwards (impeller pump under normal operating conditions) supercharging in two impeller pumps described in the utility model to deliver to absorption system, another impeller pump is for subsequent use, ram pump 7 hot reserves.In device course of normal operation, one of impeller pump described in the utility model is in running order, another maintenance or for subsequent use; In the time that described two impeller pumps break down simultaneously, described ram pump starts automatically through ESD system output signal, and holdout device low load operation, does not stop, for the maintenance of two impeller pumps provides the time.
Describe the utility model in detail below in conjunction with accompanying drawing 2, accompanying drawing 2 is drawn for the utility model is described, does not form the restriction of any embodiment to the utility model design.Equipment in the utility model embodiment, raw material are the regular size in Sweet natural gas deacidifying process.Embodiment of the present utility model is the Sweet natural gas depickling flow process of Sweet natural gas hybrid refrigeration liquefying plant.Adopt the flow process of accompanying drawing 2 shown devices as follows:
Contain sour gas (as CO
2, H
2s etc.) raw natural gas 10 enter in absorption system 1 from bottom to top and flow, alkanolamine solution (methyldiethanolamine (MDEA) solution, by 40%(weight percent) MDEA and 60%(weight percent) water form) in absorption system 1 from top to bottom flow, absorb the sour gas in raw natural gas, the Sweet natural gas 12 self-absorption systems after depickling are removed the natural gas liquefaction device in downstream; Carbon dioxide content < 50ppm in Sweet natural gas 12 after described depickling; The natural gas liquefaction device in described downstream adopts hybrid refrigeration liquefaction flow path.
The rich alkanolamine solution 11 that has absorbed sour gas enters in flash tank 2 and flashes off after flashed vapour 13, in poor rich liquid heat exchanger 3, heat exchange is warming up to 90 DEG C～95 DEG C, then entering regeneration system rapidly 4 regenerates to rich alkanolamine solution, the working pressure of regeneration system rapidly 4 is about 0.05MPaG, and service temperature is about 100 DEG C～120 DEG C; The hydro carbons of the flashed vapour 13 of described flash tank 2 for dissolving and carry secretly in alkanolamine solution.
The rich alkanolamine solution acid gas that stripping absorbs in going out solution in regeneration system rapidly 4 15, the poor alkanolamine solution 14 that obtains regeneration leave regeneration system rapidly 4 enter poor rich liquid heat exchanger 3 with rich alkanolamine solution heat exchange to approximately 70 DEG C, then through lean solution water cooler 5 water coolers to 40 DEG C～45 DEG C; Lean solution water cooler 5 can adopt air cooling, water-cooled or other low-temperature receivers of equal value that cold is provided.
Cooled poor alkanolamine solution adopts in impeller pump 6a described in the utility model and 6b, after 6a or 6b supercharging, delivers to absorption system 1, another impeller pump, and 6b or 6a are for subsequent use, ram pump 7 hot reserves.The working pressure of absorption system is generally more than 4.5MPaG, and service temperature is about 40 DEG C～45 DEG C.
Described Sweet natural gas depickling flow process is under ESD system monitoring, and ram pump is an output module of the logical program of ESD system, and ESD system arranges following logical program:
In device course of normal operation, mono-of impeller pump 6a described in the utility model and 6b are in running order, another maintenance or for subsequent use, ESD static system, ram pump hot reserve; In the time that described two impeller pump 6a and 6b break down simultaneously, ram pump 7 starts automatically through ESD system remote described in ESD system output signal, is alkanolamine solution supercharging, is delivered to absorption system 1, for the maintenance of two impeller pump 6a and 6b provides the time.
For ensureing carbon dioxide content < 50ppm in the Sweet natural gas 12 after described depickling, the corresponding reduction of raw natural gas 10 flow, deacidifying device and the operation of downstream natural gas liquefaction device load down, therefore can lose certain production capacity; But adopt method described in the utility model and device, can avoid impeller pump in traditional technology to break down must stopping deacidifying device simultaneously, cut off the source of the gas of downstream natural gas liquefaction device and stop the drawback of natural gas liquefaction device, also avoid issuable ice chest temperature decrease thus even to occur the phenomenon of ice chest hydrops, saved unnecessary device driving expense and process cost.
Claims (5)
1. in a Sweet natural gas deacidification process, be the device of depickling absorption agent supercharging, it is characterized in that: described device comprises the ram pump of two impeller pumps and a hot stand-by duty being manipulated by ESD system, two impeller pumps are connected with an important actor plug parallel connection of pumps, in device course of normal operation in two impeller pumps one is in running order, another maintenance or for subsequent use; Ram pump is in hot stand-by duty; The running of Sweet natural gas deacidification process described in described ESD system monitoring, in the time that two impeller pumps break down simultaneously, output signal directly starts ram pump running work.
2. device according to claim 1, is characterized in that: described device is used for the front end hydramine method deacidifying process of the natural gas liquefaction device that adopts hybrid refrigeration flow process.
3. device according to claim 1 and 2, is characterized in that: two impeller pumps adopt and are arranged symmetrically with, and are same size.
4. device according to claim 1 and 2, is characterized in that: ESD system is provided with in the time that two impeller pumps break down simultaneously output signal and directly starts the logical program of ram pump running work.
5. a Sweet natural gas deacidifying device that adopts front end hydramine method deacidifying process, is characterized in that, it comprises: absorption system, and it has the gas outlet end after raw natural gas entrance end, depickling, rich alkanolamine solution exit end, alkanolamine solution entrance end;
Flash tank, it has the rich alkanolamine solution entrance end, rich alkanolamine solution exit end, the flashed vapour exit end that are connected with the exit end of the rich alkanolamine solution of absorption system;
Poor rich liquid heat exchanger, it has the rich alkanolamine solution entrance end that is connected with the rich alkanolamine solution exit end of flash tank and rich alkanolamine solution exit end, poor alkanolamine solution entrance end, poor alkanolamine solution exit end;
Regeneration system rapidly, exit end, the acid gas exit end of the poor alkanolamine solution that it has the entrance end of the rich alkanolamine solution being connected with the rich alkanolamine solution exit end of poor rich liquid heat exchanger, be connected with the entrance end of the poor alkanolamine solution of poor rich liquid heat exchanger;
Lean solution water cooler, its one end be connected with the poor alkanolamine solution exit end of poor rich liquid heat exchanger, the other end is connected with one end of two impeller pumps of parallel connection and the ram pump of a hot stand-by duty being manipulated by ESD system, two impeller pumps in parallel and the ram pump of a hot stand-by duty being manipulated by the ESD system the other end are separately connected to the alkanolamine solution entrance end of absorption system after converging, wherein, in normal operation, an impeller pump is in running order, another impeller pump maintenance or for subsequent use; In the time that two impeller pumps break down simultaneously, described ESD system output signal, hot standby ram pump starts automatically, maintains deacidifying device running, and does not stop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320863664.1U CN203728790U (en) | 2013-12-25 | 2013-12-25 | Device for pressurizing deacidifying absorbent in natural gas deacidifying procedure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320863664.1U CN203728790U (en) | 2013-12-25 | 2013-12-25 | Device for pressurizing deacidifying absorbent in natural gas deacidifying procedure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203728790U true CN203728790U (en) | 2014-07-23 |
Family
ID=51198876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320863664.1U Withdrawn - After Issue CN203728790U (en) | 2013-12-25 | 2013-12-25 | Device for pressurizing deacidifying absorbent in natural gas deacidifying procedure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203728790U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103695064A (en) * | 2013-12-25 | 2014-04-02 | 新地能源工程技术有限公司 | Method and device for pressurizing deacidification absorbent in natural gas deacidification procedure |
-
2013
- 2013-12-25 CN CN201320863664.1U patent/CN203728790U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103695064A (en) * | 2013-12-25 | 2014-04-02 | 新地能源工程技术有限公司 | Method and device for pressurizing deacidification absorbent in natural gas deacidification procedure |
| CN103695064B (en) * | 2013-12-25 | 2015-09-30 | 新地能源工程技术有限公司 | Be the method for depickling absorption agent supercharging and device in Sweet natural gas deacidification process |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140723 Effective date of abandoning: 20150930 |
|
| RGAV | Abandon patent right to avoid regrant |