CN202576313U - Expansion drying and internal heating fluidized bed drying system special for chlorinated polyethylene - Google Patents
Expansion drying and internal heating fluidized bed drying system special for chlorinated polyethylene Download PDFInfo
- Publication number
- CN202576313U CN202576313U CN 201220145962 CN201220145962U CN202576313U CN 202576313 U CN202576313 U CN 202576313U CN 201220145962 CN201220145962 CN 201220145962 CN 201220145962 U CN201220145962 U CN 201220145962U CN 202576313 U CN202576313 U CN 202576313U
- Authority
- CN
- China
- Prior art keywords
- fluidized bed
- internal heating
- drying
- heating fluidized
- heat exchanger
- 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.)
- Withdrawn - After Issue
Links
Images
Landscapes
- Drying Of Solid Materials (AREA)
Abstract
The utility model provide an expansion drying and internal heating fluidized bed drying system special for chlorinated polyethylene. The expansion drying and internal heating fluidized bed drying system comprises two-stage drying, wherein an air inlet of an expansion heat exchanger of the first-stage drying is communicated with air; an air outlet of the expansion heat exchanger is connected with an expansion blower; the expansion heat exchanger is also connected with a steam heat source; the expansion blower is connected with an expansion dryer; a stirring device is arranged in the expansion dryer; wet materials are connected with the expansion dryer through a conveying device; the second-stage drying comprises an internal heating fluidized bed and a steam heat exchanger; the air is fed into an air inlet of the steam heat exchanger through a fluidized bed blower; an air outlet of the steam heat exchanger is connected with an air inlet of an air chamber at the lower part of the internal heating fluidized bed; an overflow port of the internal heating fluidized bed is connected with a pneumatic conveying system; an exhaust port in the upper part of the internal heating fluidized bed is connected with dust removing equipment II; and the dust removing equipment II is connected with a draught fan. The expansion drying and internal heating fluidized bed drying system has the benefits that the utilization rate of energy is improved, the operation reliability of the system is improved and the power consumption and the steam consumption are greatly saved.
Description
Technical field
The utility model is a kind of chlorinatedpolyethylene dry technology, and the special-purpose expansion drying of a kind of specifically chlorinatedpolyethylene adds internal heating fluidized bed dehumidification system.
Background technology
We know that chlorinatedpolyethylene uses warm air as drying medium, and the existing at present general air-flow that uses adds common fluid bed drying process; This technology is that Chinese patent 200610045528.6 discloses a kind of chlorinated polyethylene drying process, and it has solved and all will experience one time heating and cooling process in the existing drying process, and energy wastage is serious; And intermittent type fluidized-bed output is little, can not maximize, and labor strength is big; Problems such as the easy fluctuation of product water cut; Its process using warm air adds the secondary fluidised bed drying as drying medium through the one-level pulsed pneumatic drying, is moisture content that moisture content is less than 0.3% finished product greater than 30%～55% chlorinatedpolyethylene drying.Air stream drying uses high temperature air to carry out surface water rapid drying, and fluidized-bed carries out depth drying to material.This system does not have running gear, and equipment uses and keeps in repair easyly, and system failure rate is low; Safe and reliable, to realize carrying out continuously, the centre does not have personnel operation; Reduced labor strength, fluidized-bed bed temperature-stable, thermo-efficiency is high; Material is residence time basically identical in bed, and the product water cut is low and stable.
But there is certain deficiency in this patent: former utility model has only solved the continuous and automatic problem of producing; Consider less to capacity usage ratio and production cost; Original system also exists can not handle the bonded particulate material that whizzer comes out, and use range is under some influence.Details are as follows: one-level is used pneumatic drier, about 20 meter per seconds of the movement velocity of material in drying machine, and the residence time is generally less than about one second; Time is short; Material can not thorough drying, and pneumatic drier does not have mechanical stirring device simultaneously, if wet stock viscosity is big or have particle to exist; Produce buildup at the air stream drying motor spindle easily, influence the quality of equipment operation and product.The drying process of the common fluidized-bed of secondary, common fluidized-bed belongs to indirect heat exchange equipment, need at first heat hot blast; Hot blast so the air capacity that needs is big, causes occupation area of equipment big at the heat drying material then; Treatment capacity is little, and air quantity is big, and the tail gas heat quantity loss is serious; The big sizable shortcoming of the power consumption of total system and steam consumption quantity causes the energy consumption of dehumidification system to account for about 75% in the production technique of whole chlorinatedpolyethylene, has seriously increased production cost.
The utility model content
The utility model is the deficiency that overcomes above-mentioned prior art, provides the special-purpose expansion drying of a kind of chlorinatedpolyethylene to add internal heating fluidized bed dehumidification system, and its one-level adopts flash dryer; Introduce mechanical stirring device, can lumpy material is broken, reduced the travelling speed in drying machine of material simultaneously; Prolong the time of drying of material significantly; It is high to have improved capacity usage ratio, and the flexibility of wet stock is increased substantially, and can handle the viscosity lumpy material.Secondary is introduced built-in interchanger, and the required a large amount of heats of dry materials are provided by built-in heat exchanger, and air only plays goods fluid and the effect of the heat of few part is provided.Greatly reduce the equipment drying area, reduced air capacity, the change indirect heat exchange is direct heat exchange.Simultaneously, the thermal source of built-in interchanger can use the reaction heat that produced when early stage, process stream reacted, and has integrated the heat balance of whole production system, need not increase new heat.So the utility model provides the reliable and stable special-purpose internal heating fluidized bed drying technology of chlorinatedpolyethylene; Practiced thrift power consumption and steam consumption quantity greatly, working cost is low, has improved the device processes amount; Simultaneously can handle the high-quality product of HV, than original system energy efficient more than 30%.As the production cost of whole industry being had bigger reduction in the industry promotion conference.Regeneration product for the drying polyvinyl chloride system.
For realizing above-mentioned purpose, the utility model adopts following technical scheme:
The special-purpose expansion drying of a kind of chlorinatedpolyethylene adds internal heating fluidized bed dehumidification system, and first step drying comprises the heat exchange of flash evaporation device, heat exchange of flash evaporation device blast inlet and air communication, and air outlet is connected with the flash drum blower fan, and the heat exchange of flash evaporation device also is connected with steam source; The flash drum blower fan is connected with flash dryer, is provided with whipping appts in the flash dryer; Wet stock is connected with flash dryer through e Foerderanlage; The material outlet of flash dryer is connected with dust removal installation I, and the discharge port of dust removal installation I is connected with the internal heating fluidized bed opening for feed that second stage exsiccant has built-in heat exchanger; The tail gas relief outlet of dust removal installation I is connected with the flash distillation induced draft fan;
Second stage drying also comprises vapor heat exchanger except that internal heating fluidized bed, air is sent into the vapor heat exchanger blast inlet through the fluidized-bed gas blower, and the vapor heat exchanger air outlet is connected with the blast inlet of internal heating fluidized bed bottom air compartment; Internal heating fluidized bed riser is connected with air-transport system, and the exhaust outlet on internal heating fluidized bed top is connected with dust removal installation II, and dust removal installation II is connected with induced draft fan.
Said e Foerderanlage is the screw feeding auger.
Said dust removal installation I is cyclonic separator I, and dust removal installation II is cyclonic separator II.
The discharge port of said cyclonic separator I is provided with star-like dumper.
Match with air compartment in said internal heating fluidized bed bottom is provided with air distribution plate; Internal heating fluidized bed built-in heat exchanger water-in is connected with hot water simultaneously, and water outlet is connected with circulation line.
The internal heating fluidized bed charging opening place that has built-in heat exchanger of said secondary drying does not arrange built-in heat exchanger.
A kind of drying process that adopts the special-purpose expansion drying of chlorinatedpolyethylene to add internal heating fluidized bed dehumidification system, it is a thermal source with steam and hot water, carries out the two-stage drying, drying process is:
1) one-level is dry: wet material adds flash dryer by the screw feeding auger, and dry air gets into flash dryer through heat exchange of flash evaporation device heating back; Material fully contacts with high temperature air in flash dryer; Material is accomplished the drying of surface water in flash dryer, simultaneously, part macrobead viscous material is broken up by the mechanical stirring blade in the flash dryer; Avoided the material bonding; Also increased the drying efficiency of material simultaneously, dried material gets into internal heating fluidized bed drying machine by cyclonic separator I through star-like dumper and carries out secondary drying, tail gas after flash distillation induced draft fan pressurization by the evacuated tube emptying;
2) secondary drying: the material after the primary pre-drying is joined in the internal heating fluidized bed drying machine by star-like discharging; Air sucks the pressurization back by the fluidized-bed gas blower and gets into vapor heat exchanger, and the air after the heating is sent into internal heating fluidized bed drying machine; Material and warm air and the internal heating fluidized bed interior hot water of interchanger carry out heat exchange; Under the dual function of hot blast and hot water, accomplish drying process; Thereby the change indirect heat exchange is direct heat exchange, has improved capacity usage ratio, has reduced the power consumption and the steam consumption quantity of system; Dried material is discharged through the riser of fluidized-bed, gets into air-transport system, and the tail gas of discharging from the fluidized-bed top purifies the back emptying through tornado dust collector II.
Air branch multichannel after the said heating gets into internal heating fluidized bed drying machine bottom air compartment, passes air distribution plate again and gets into bed; The air that in this process, gets into bed is effectively controlled, thereby makes an interior material keep stable fluidization.
Said built-in heat exchanger hot water source is a process system waste heat in early stage, no longer increases new heat, balance the production system heat, be beneficial to energy-conservation.
The beneficial effect of the utility model is:
1. the internal heating fluidized bed dehumidification system of chlorinatedpolyethylene has improved capacity usage ratio; Because the drying of using of fluidized-bed built-in heat exchanger is direct heat exchange by indirect heat exchange, most of heat is brought into thus, has improved equipment monomer output greatly; Reduced occupation area of equipment; Realized the scale operation of drying polyvinyl chloride, realized the maximization of drying polyvinyl chloride device, the efficient of former drying polyvinyl chloride system has been had increase substantially.
2. according to the drying property of chlorinatedpolyethylene, one-level adopts expansion drying, has reduced gas velocity; Increased the time of drying of material and high temperature air, be more conducive to the removing of surface water of chlorinatedpolyethylene, flash dryer adopts mechanical stirring to strengthen the dry tenacity of material; And material is kept in motion; Be difficult for bonding, improved system's serviceability, and can the big quality of production viscosity ratio by product type.
3. secondary drying adopts the internal heating fluidized bed deep dehydration that carries out; Big of the dry institute of chlorinatedpolyethylene heat requirement is provided by built-in heat exchanger; Hot blast is brought the small portion heat into and is provided the normal fluidisation of material required air quantity; Significantly reduced institute of system required airflow, the minimizing of systematic air flow brings following favourable condition: at first, reduced the air quantity of blower fan.Reduce the power of blower fan, reduced the power consumption of system.Secondly, dust-removal system reduces greatly, has reduced facility investment, has improved the feature of environmental protection of system, and system's tail gas amount reduces greatly once more, has reduced the power loss that causes because of exhaust emissions.Owing to above reason, make native system on power consumption and steam consumption quantity, practice thrift greatly than original system, reduced running cost, reduced energy expenditure more than 30%.
4. the hot water of built-in heat exchanger uses institute's liberated heat in the production process mid-early stage chloridization process, has realized the low-grade exhaust heat utilization, balance the heat of whole production technology, be beneficial to energy-conservation more.
5. system adopts the segmentation air intake, and the choose reasonable EAT divides the multistage air intake according to the difference of material dewatering degree, has both improved thermo-efficiency, avoids material overtemperature sex change in bed.
6. equipment adopts and destatics measure, and each equipment is carried out electrostatic grounding, and the place that needs in system simultaneously feeds direct current, eliminates static, and glutinous pipe reduces heat exchange efficiency because of static focus produces to avoid chlorinatedpolyethylene.
7. the equipment feed end is not arranged interchanger, has reduced the bonding of wet stock to built-in heat exchanger.
Description of drawings
Fig. 1 is the utility model technical process.
Among Fig. 1,1, the heat exchange of flash evaporation device, 2, the screw feeding auger, 3, the flash drum blower fan; 4, flash dryer, 5, cyclonic separator I, 6, the flash distillation induced draft fan; 7, fluidized-bed gas blower, 8, vapor heat exchanger, 9, internal heating fluidized bed drying machine; 10, cyclonic separator II, 11, star-like dumper, 12, induced draft fan.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further specified.
Among Fig. 1, comprise that two-stage is dry, wherein first step drying plant comprises: heat exchange of flash evaporation device 1; Air is sent into flash dryer 4 through flash drum blower fan 3 after being heated to be warm air through heat exchange of flash evaporation device 1, is provided with whipping appts in the flash dryer 4; In whipping appts is arranged, can handle the bulk viscous material, product quality is provided; Increase the residence time of material, reduced the water ratio of elementary dry back material; Wet stock is sent into flash dryer 4 through screw feeding auger 2; The discharge gate of flash dryer 4 is connected with cyclonic separator I, in flash dryer 4 material with high temperature air fully contact, material is accomplished the drying of surface water in flash dryer 4; Simultaneously; Part macrobead viscous material is broken up by the mechanical stirring blade in the drying machine, has avoided the material bonding, has also increased the drying efficiency of material simultaneously; Dried material is collected through star-like dumper 11 by cyclonic separator I5 and is got into the internal heating fluidized bed drying machine 9 that has built-in heat exchanger, tail gas after 6 pressurizations of flash distillation induced draft fan by the evacuated tube emptying.
The second stage is dry: air is sent into vapor heat exchanger 8 through fluidized-bed gas blower 7, and vapor heat exchanger 8 is connected with the air compartment of internal heating fluidized bed drying machine 9 bottoms, and then passes air distribution plate entering bed.The interchanger of internal heating fluidized bed drying machine 9 is connected with hot-water line, carries out heat exchange through interchanger and material.Dried material is sent into air-transport system from the riser of internal heating fluidized bed drying machine 9, and the tail gas of discharging from internal heating fluidized bed drying machine 9 tops is through cyclonic separator II10 purification, induced draft fan 12 back emptyings.
Internal heating fluidized bed drying machine 9 can adopt the internal heating fluidized bed drying machine of pipe embedded typ; Built-in heat exchanger is built-in heat transfer tube; Each heat transfer tube adopts the pipe embedded typ mode to be installed in the fluid bed dryer, uses built-in heat exchanger, and the change indirect heat exchange is direct heat exchange; Improve capacity usage ratio, reduced the power consumption and the steam consumption quantity of system.The built-in heat exchanger water-in is connected with hot water, and water outlet is connected with circulation line.
The internal heating fluidized bed charging opening place of secondary drying does not arrange built-in heat exchanger, has reduced the possibility of wet stock bonding interchanger, has improved system's operation stability.
The drying process of the utility model adopts two-stage dry, and thermal source adopts hot water and steam.
One-level is dry: wet material adds flash dryer 3 by screw feeding auger 2; Dry air gets into flash dryer 4 through heat exchange of flash evaporation device 1 heating back, in flash dryer 4 material with high temperature air fully contact, material is accomplished the drying of surface water in flash dryer 4; Simultaneously; Part macrobead viscous material is broken up by the mechanical stirring blade in the drying machine, has avoided the material bonding, has also increased the drying efficiency of material simultaneously; Dried material is collected through star-like dumper 11 by cyclonic separator I5 dedusting and is got into internal heating fluidized bed drying machine 9, tail gas after 6 pressurizations of flash distillation induced draft fan by the evacuated tube emptying.
Secondary drying: the material after the primary pre-drying is joined in the internal heating fluidized bed drying machine 9 through elephant trunk by star-like dumper 11.Air sucks the pressurization back by fluidized-bed gas blower 7 and gets into vapor heat exchanger 8, and the air branch multichannel after the heating gets into internal heating fluidized bed drying machine 9 bottom air compartments, passes air distribution plate again and gets into bed.The air that in this process, gets into bed is effectively controlled, thereby makes an interior material keep stable fluidization, and material and hot water carry out heat exchange through the interchanger in the bed, under the dual function of hot blast and hot water, accomplish drying process.The exsiccant material is discharged through the riser of internal heating fluidized bed drying machine 9, gets into air-transport system, and the tail gas of discharging from internal heating fluidized bed drying machine 9 tops purifies the back by 6 emptyings of flash distillation induced draft fan through cyclonic separator II10 fly-ash separator.In internal heating fluidized bed drying machine 9 drying processs, most dry heat is provided by built-in heat exchanger, and hot water supplies the heat transferred material transpiring moisture used at the built-in heat exchanger internal recycle through built-in heat exchanger.Air only makes goods fluid and few part heat is provided.The built-in heat exchanger hot water source is a process system waste heat in early stage, no longer increases new heat, balance the production system heat, be beneficial to energy-conservationly, capacity usage ratio improves 30%.
Claims (6)
1. the special-purpose expansion drying of chlorinatedpolyethylene adds internal heating fluidized bed dehumidification system; It is characterized in that first step drying comprises the heat exchange of flash evaporation device, heat exchange of flash evaporation device blast inlet and air communication; Air outlet is connected with the flash drum blower fan, and the heat exchange of flash evaporation device also is connected with steam source; The flash drum blower fan is connected with flash dryer, is provided with whipping appts in the flash dryer; Wet stock is connected with flash dryer through e Foerderanlage; The material outlet of flash dryer is connected with dust removal installation I, and the discharge port of dust removal installation I is connected with the internal heating fluidized bed opening for feed that second stage exsiccant has built-in heat exchanger; The tail gas relief outlet of dust removal installation I is connected with the flash distillation induced draft fan;
Second stage drying also comprises vapor heat exchanger except that internal heating fluidized bed, air is sent into the vapor heat exchanger blast inlet through the fluidized-bed gas blower, and the vapor heat exchanger air outlet is connected with the blast inlet of internal heating fluidized bed bottom air compartment; Internal heating fluidized bed riser is connected with air-transport system, and the exhaust outlet on internal heating fluidized bed top is connected with dust removal installation II, and dust removal installation II is connected with induced draft fan.
2. the special-purpose expansion drying of chlorinatedpolyethylene as claimed in claim 1 adds internal heating fluidized bed dehumidification system, it is characterized in that said e Foerderanlage is the screw feeding auger.
3. the special-purpose expansion drying of chlorinatedpolyethylene as claimed in claim 1 adds internal heating fluidized bed dehumidification system, it is characterized in that said dust removal installation I is cyclonic separator I, and dust removal installation II is cyclonic separator II.
4. the special-purpose expansion drying of chlorinatedpolyethylene as claimed in claim 3 adds internal heating fluidized bed dehumidification system, it is characterized in that the discharge port of said cyclonic separator I is provided with star-like dumper.
5. the special-purpose expansion drying of chlorinatedpolyethylene as claimed in claim 1 adds internal heating fluidized bed dehumidification system, it is characterized in that, match with air compartment in said internal heating fluidized bed bottom is provided with air distribution plate; Internal heating fluidized bed built-in heat exchanger water-in is connected with hot water simultaneously, and water outlet is connected with circulation line.
6. the special-purpose expansion drying of chlorinatedpolyethylene as claimed in claim 1 adds internal heating fluidized bed dehumidification system, it is characterized in that the internal heating fluidized bed charging opening place that has built-in heat exchanger of said secondary drying does not arrange built-in heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220145962 CN202576313U (en) | 2012-04-09 | 2012-04-09 | Expansion drying and internal heating fluidized bed drying system special for chlorinated polyethylene |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220145962 CN202576313U (en) | 2012-04-09 | 2012-04-09 | Expansion drying and internal heating fluidized bed drying system special for chlorinated polyethylene |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202576313U true CN202576313U (en) | 2012-12-05 |
Family
ID=47245745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220145962 Withdrawn - After Issue CN202576313U (en) | 2012-04-09 | 2012-04-09 | Expansion drying and internal heating fluidized bed drying system special for chlorinated polyethylene |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202576313U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105169727A (en) * | 2015-09-09 | 2015-12-23 | 陕西科技大学 | Evaporation and concentration system and process for diluted hydrochloric acid generated by production of chlorinated polyethylene |
| CN108613481A (en) * | 2018-05-30 | 2018-10-02 | 周封 | Using the energy conservation and environmental protection evaporation drying production technology of MVR |
| CN109605631A (en) * | 2018-12-12 | 2019-04-12 | 中国石油化工股份有限公司 | A kind of energy-saving rubber fluidisation blade integrated dry drying system |
| CN111023704A (en) * | 2019-12-23 | 2020-04-17 | 济南岳丰能源科技有限公司 | Drying system and process for high chlorinated polyethylene resin |
-
2012
- 2012-04-09 CN CN 201220145962 patent/CN202576313U/en not_active Withdrawn - After Issue
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105169727A (en) * | 2015-09-09 | 2015-12-23 | 陕西科技大学 | Evaporation and concentration system and process for diluted hydrochloric acid generated by production of chlorinated polyethylene |
| CN105169727B (en) * | 2015-09-09 | 2017-04-12 | 陕西科技大学 | Evaporation and concentration system and process for diluted hydrochloric acid generated by production of chlorinated polyethylene |
| CN108613481A (en) * | 2018-05-30 | 2018-10-02 | 周封 | Using the energy conservation and environmental protection evaporation drying production technology of MVR |
| CN109605631A (en) * | 2018-12-12 | 2019-04-12 | 中国石油化工股份有限公司 | A kind of energy-saving rubber fluidisation blade integrated dry drying system |
| CN109605631B (en) * | 2018-12-12 | 2021-03-02 | 中国石油化工股份有限公司 | Energy-saving rubber fluidization paddle integration drying system |
| CN111023704A (en) * | 2019-12-23 | 2020-04-17 | 济南岳丰能源科技有限公司 | Drying system and process for high chlorinated polyethylene resin |
| CN111023704B (en) * | 2019-12-23 | 2021-05-07 | 济南岳丰能源科技有限公司 | Drying system and process for high chlorinated polyethylene resin |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102603937B (en) | Flash drying and internal heated fluidized bed drying system and process special for chlorinated polyethylene | |
| CN100443509C (en) | Chlorinated polyethylene drying process | |
| CN201569251U (en) | Oxygen-free lignite drying system | |
| CN202501711U (en) | Fluidized bed drying device | |
| CN201897365U (en) | Vibration fluidized bed microwave drying system for vapor compression heat energy recirculation | |
| CN202576313U (en) | Expansion drying and internal heating fluidized bed drying system special for chlorinated polyethylene | |
| CN204329525U (en) | A kind of net belt type heat pump drying line | |
| CN103575081A (en) | Fermented feed drying method | |
| CN206352947U (en) | A kind of Split high-efficiency heat pump dryer | |
| CN101957125B (en) | Multiple-effect vacuum continuous drying equipment | |
| CN103575082B (en) | Fermented feed drying system | |
| CN207845466U (en) | A kind of energy-saving sludge processing unit | |
| CN112902657B (en) | Molybdenum oxide roasting system | |
| CN203586725U (en) | Fermented forage drying device | |
| CN2088675U (en) | Chain board transmission hot wind circulation drier | |
| CN208187026U (en) | A kind of sludge dehumidification type multistage recuperation of heat anhydration system | |
| CN216716928U (en) | Energy-saving grain drier | |
| CN202456342U (en) | Complete plant for drying fermented feed | |
| CN205175059U (en) | Plastic drying machine | |
| CN108224998A (en) | Graphene particles drier special | |
| CN203451835U (en) | Drying system in viscose staple fiber production | |
| CN202166290U (en) | Airflow type plant drying machine | |
| CN212482034U (en) | Potash fertilizer counter-current rotary drum drying system and potash fertilizer production line adopting same | |
| CN203586724U (en) | Feed grain energy-saving dryer | |
| CN217483103U (en) | Multistage waste heat recovery and utilization system of steam drying equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20121205 Effective date of abandoning: 20140101 |
|
| RGAV | Abandon patent right to avoid regrant |