CN104549096B - The heating medium for heating device of precondensation still and heating means - Google Patents
The heating medium for heating device of precondensation still and heating means Download PDFInfo
- Publication number
- CN104549096B CN104549096B CN201510001667.8A CN201510001667A CN104549096B CN 104549096 B CN104549096 B CN 104549096B CN 201510001667 A CN201510001667 A CN 201510001667A CN 104549096 B CN104549096 B CN 104549096B
- Authority
- CN
- China
- Prior art keywords
- heating
- heating agent
- circular head
- agent
- gas phase
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0053—Details of the reactor
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
- C08G63/12—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from polycarboxylic acids and polyhydroxy compounds
- C08G63/16—Dicarboxylic acids and dihydroxy compounds
- C08G63/18—Dicarboxylic acids and dihydroxy compounds the acids or hydroxy compounds containing carbocyclic rings
- C08G63/181—Acids containing aromatic rings
- C08G63/183—Terephthalic acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/78—Preparation processes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/141—Feedstock
Abstract
The invention discloses heating medium for heating device and the heating means of precondensation still, described precondensation still import is provided with heater, heater connects single heating source input pipe, the entrance point of heater is provided with circular head, circular head is provided with heating medium for heating chuck, the circular head of described precondensation kettle heater is also associated with heating agent flash tank, connect on described heating medium for heating chuck and have single gas phase heating agent input pipe, heating agent condensed fluid outlet tube it is provided with bottom circular head, heating agent condensed fluid outlet tube is connected with heating agent flash tank, gas phase heating agent input pipe is connected with heating agent flash drum overhead.Advantages of the present invention is: 1, by heating agent heating independent to circular head, be greatly improved the efficiency of heating surface to circular head, it is to avoid material solidifies at circular head, improves product quality, it is to avoid produce material phenomenon of collapsing.2, heating agent condensed fluid outlet tube is connected with heating agent flash tank, and after heating circular head, the heating agent of condensation is transmitted back to heating agent flash tank, it is achieved the circulating-heating of heating agent.
Description
Present disclosure relates to the production equipment of polyester, particularly relates to a kind of preshrunk producing polyethylene terephthalate
The heating medium for heating device of poly-still and heating means.
The production of background technology polyester is at esterification reaction device by esterification reaction raw material ethylene glycol (EG) and p-phthalic acid (PTA)
In coordinate in certain proportion, in addition suitable temperature, pressure condition, keep enough time thus complete esterification, generate
Ethylene glycol terephthalate (BHET), the most further does polycondensation to the PET generated and processes, and generates poly-
Ethylene glycol terephthalate.
At present, the process units of polyethylene terephthalate generally comprises esterifying kettle, precondensation still and whole polycondensation vessel.Such as figure
Shown in 1, precondensation still import is provided with heater 01, and heater 01 entrance point is provided with circular head 02, and heater 01 is with circular
End socket 02 shares a heating source, and this heating source is secondary gas phase heating agent.Heating agent condensed fluid outlet tube it is provided with bottom circular head 02
03；Circular head 02 connects has gas phase heating agent to enter pipe 04, provides heating source for heater 01 and circular head 02.Precondensation
In still, the reaction principle of material is: esterification products, from the bottom feed of precondensation still, is added by esterification products through precondensation kettle heater
Sending into reactor tower tray after heat to carry out esterification and add polycondensation reaction, in tower tray, material horizontal sliding baffling advances form, and material enters from lower to upper
Entering precondensation still cavity upper end, top negative pressure evacuation, a small amount of moisture reaction produced and ethylene glycol produce together with side reaction
Little molecule thing is extracted out jointly, thus increases material viscosity.
In process of production, easily there is " collapse material " phenomenon, show as kettle tower tray section Flow of Goods and Materials speed in precondensation still before
Slowing down, cause still internal upper part material liquid level to decline, material viscosity declines, and causes product viscosity significantly to deviate normal value, product
Degradation.
Finding through many experiments research, the reason producing the problems referred to above is that the preshrunk kettle heater import circular head efficiency of heating surface is low,
Underheat, causes material to solidify herein, and as time went on, coagulum doses increases, and Flow of Goods and Materials resistance increases, thing
Stream speed is accelerated, thus is washed away by solidification material, crushes, and solidified particle is brought into heater and preshrunk still tower tray, causes material
Flowing blocks, and flowing is not smooth, thus causes preshrunk still liquid level to decline suddenly.Further, since there is the time at reactor in coagulum
Longer, material properties changes, and therefore viscosity is relatively low, causes properties of product unstable.
Domestic had the relevant report solving the problems referred to above at present.Such as, Patent No. 200510073294.1, patent name
Patent of invention for " new type non-agitating multiplayer pre-polycondensation kettle for polyester " discloses a kind of non-agitating multiplayer pre-polycondensation kettle for polyester, its bag
Include the ring-type demarcation strip of multilamellar and space in still is divided into reactive multilayer district and a central steam channel district by central canal；Bottom
Set on the most each conversion zone annular baffle between water conservancy diversion spiral ring flat-plate or multi-turn water conservancy diversion ring flat-plate, multi-turn water conservancy diversion ring flat-plate or water conservancy diversion spiral ring flat-plate
If heating coil.Setting cone parachute plate above reaction zone, bottom, melt is along cone parachute plate falling liquid film to still wall falling liquid film again, in bottom reaction zone
Flow in horizontal sliding, absolutely not channel or dead angle.Compare with existing band stirring multilamellar precondensation still, not only simplified structure but also improved reaction and driven
Power, and increase EG steam interface, killing three birds with one stone.Central steam channel is designed to cyclone separator dexterously, effectively removes
From still steam entrainment.Though this patent can avoid material to be seriously detained in precondensation bottom portion, but need to enter equipment inner structure
Row improves, not only big to the change amount of equipment, and cost is high.
Summary of the invention, in order to overcome the deficiency of original technology, it is an object of the invention to provide a kind of production and stablizes, will not collapse material now
The heating medium for heating device of the precondensation still of elephant and heating means.
The heating medium for heating device of the precondensation still of the present invention, described precondensation still import is provided with heater, and heater connects to be had individually
Heating source input pipe, the entrance point of heater is provided with circular head, and circular head is provided with heating medium for heating chuck, described preshrunk
The circular head of poly-kettle heater is also associated with heating agent flash tank, and described heating medium for heating chuck connects has single gas phase heating agent defeated
Entering pipe, be provided with heating agent condensed fluid outlet tube bottom circular head, heating agent condensed fluid outlet tube is connected with heating agent flash tank, described gas
Phase heating agent input pipe is connected with heating agent flash drum overhead.
Further, in described gas phase heating agent input pipe, the heating agent of input is primary gas phase heating agent.
Further, the heating medium for heating chuck top of described circular head is provided with two blow-down pipes.
Further, described heating agent condensed fluid outlet tube is provided with liquid sealing pipe.
Further, the height of described liquid sealing pipe is 10-15 rice.
The present invention, compared with original technology, has the advantage that 1, by heating agent heating independent to circular head, is greatly improved circle
The efficiency of heating surface of shape end socket, it is to avoid material solidifies at circular head, improves product quality, it is to avoid produce material phenomenon of collapsing.2, heat
Matchmaker's condensed fluid outlet tube is connected with flash tank, and the heating agent that heating agent condensed fluid outlet tube condenses after being heated by circular head is transmitted back to flash distillation
Tank, by processing, is converted into gas phase heating agent by heating agent condensed fluid, and circle is again sealed by gas phase heating agent by gas phase heating agent input pipe
Head heating, it is achieved the heating agent circulating-heating to equipment.3, heating agent condensed fluid outlet tube is provided with liquid sealing pipe, increases heating agent to circle
Pressure in the heat time heating time of end socket and heating medium for heating chuck, fully heats circular head, improves heating medium for heating efficiency.4、
Setting up blow-down pipe on the heating medium for heating chuck of circular head, the low-molecular material that use long-time to heating agent causes cracking to produce fills
Divide emptying, improve heating.5, using primary gas phase heating agent is heating source, and heating-up temperature improves, and is greatly improved circular head
The efficiency of heating surface.
In a word, the present invention, on the basis of existing equipment, is provided separately thermal source to circular head, solves at present with minimum cost
The problems such as precondensation still entrance point material easily solidification.Compared with prior art, low cost, effect is obvious.
The present invention is further detailed explanation with detailed description of the invention below in conjunction with the accompanying drawings in accompanying drawing explanation:
Fig. 1 is the structural representation of the heating medium for heating device of original precondensation still；
Fig. 2 is the structural representation of the heating medium for heating device of precondensation still of the present invention.
Detailed description of the invention
As in figure 2 it is shown, the heating medium for heating device of precondensation still of the present invention, the import of described precondensation still 1 is provided with heater 2, adds
Hot device 2 connects single heating source input pipe, and the entrance point of heater 2 is provided with circular head 3, and circular head 3 is provided with
Heating medium for heating chuck 31, the circular head 3 of described precondensation kettle heater 2 is also associated with heating agent flash tank 4, and described heating agent adds
Connect on thermal jacket 31 and have single gas phase heating agent input pipe 5, bottom circular head 3, be provided with heating agent condensed fluid outlet tube 6, heat
Matchmaker's condensed fluid outlet tube 6 is connected with heating agent flash tank 4, and gas phase heating agent input pipe 5 is connected with heating agent flash tank 4 top.
Further, in described heating agent input pipe 5, the heating agent of input is primary gas phase heating agent.
Further, heating medium for heating chuck 31 top of described circular head 3 is provided with two blow-down pipes 32.
Further, described heating agent condensed fluid outlet tube 6 is provided with liquid sealing pipe 7.
Further, the height of described liquid sealing pipe 7 is 10-15 rice.
In prior art, the underheated reason of circular head is: the hot channel that adds of circular head shares same with preshrunk kettle heater
One always adds heat pipe, and major part heat is absorbed by preshrunk kettle heater, thus it is inadequate to cause circular head to add heat.
In the present invention, described heating medium for heating chuck 31 connects and has single gas phase heating agent input pipe 5, by heating agent to circular head 3
Individually heating, is greatly improved the efficiency of heating surface to circular head 3, it is to avoid material solidifies at circular head 3, improves product matter
Amount, it is to avoid produce material phenomenon of collapsing.Heating agent condensed fluid outlet tube 6 is connected with heating agent flash tank 4, and heating agent condensed fluid outlet tube 6 will
After circular head 3 heating, the heating agent of condensation is transmitted back to heating agent flash tank 4, is processed by heating agent flash tank 4, by heating agent condensed fluid
Being converted into gas phase heating agent, circular head 3 is again heated by gas phase heating agent by gas phase heating agent input pipe 5, it is achieved the circulation of heating agent
Heating.
In the patent that background technology is mentioned, multichannel thermal source is used precondensation still to be heated to be conventional design, in this patent not
Individually provide thermal source to the circular head of precondensation still, thus need the structure in precondensation still to be improved, to setting
Standby change amount is big, and cost is high.
In described gas phase heating agent input pipe 5, the heating agent of input is primary gas phase heating agent.In original technology, heating source is secondary gas phase
Heating agent.In the present invention, secondary gas phase heating medium for heating change original heating source into primary gas phase heating medium for heating, due to secondary gas phase
Heat medium temperature is 290 degree, and primary gas phase heat medium temperature is 320 degree, is greatly improved the efficiency of heating surface to circular head 3.
The heating medium for heating chuck 31 of described circular head 3 is provided with the blow-down pipe 32 of more than two.Owing to being additionally arranged blow-down pipe 32,
The low-molecular material that use long-time to heating agent causes cracking to produce fully is vented, and improves heating.
Described heating agent condensed fluid outlet tube 6 is provided with liquid sealing pipe 61.
The height of described liquid sealing pipe 61 is 10-15 rice, so that primary gas phase heating agent is in the warm of preshrunk kettle heater circular head 3
There are enough pressure and the time of staying in matchmaker's heating jacket 31, fully circular head 3 heated, improve heating agent utilization ratio.
The operation principle of the heating medium for heating device of precondensation still of the present invention is: primary gas phase heating agent enters circle by heating agent input pipe 5
In the heating medium for heating chuck 31 of shape end socket 3, circular head 3 is heated, it is ensured that the temperature of circular head 3.Due to heating agent
After carrying out heat exchange with circular head 3, temperature reduces, and is condensed into heating agent condensed fluid, and heating agent condensed fluid falls due to action of gravity
Below circular head 3, and being exported by the heating agent condensed fluid outlet tube 6 connected on circular head 3, heating agent condensed fluid is introduced into
Liquid sealing pipe 61 is set on heating agent condensed fluid outlet tube 6, increases heating agent to heat time heating time of circular head 3 and heating medium for heating chuck 31
Interior pressure, fully heats circular head 3, improves heating agent utilization ratio.After liquid sealing pipe 61 has been expired, heating agent condenses
Liquid stream backflash steaming pot 4, liquid phase heating agent is transferred to gas phase heating agent by flash tank 4, and gas phase heating agent is entered again by gas phase heating agent input pipe
Enter the heating medium for heating chuck of circular head, it is achieved the circulating-heating of heating agent.
The operation principle that liquid phase heating agent is converted to gas phase heating agent is by heating agent flash tank 4: liquid phase heating agent is bottom circular head 3
Heating agent condensed fluid outlet tube 6 is discharged, and gets to coal-fired furnace (not shown) through a heat medium pump, and the heated output of heating agent is to heating agent
Flash tank 4 middle and upper part, is injected into heating agent flash tank top from heating agent flash tank 4 middle and upper part, due to heating agent flash tank 4 top
Temperature is 325 degree, and pressure is 500KPa, and liquid phase heating agent gasifies rapidly after losing pressure suddenly, forms heating agent steam, steam
Pressure is maintained at about 150 to 200KPa, obtains primary gas phase heating agent.Primary gas phase heating agent under pressure, dodges from heating agent
Steaming pot 4 top is delivered in the heating medium for heating chuck of the circular head needing heating by gas phase heating agent input pipe 5, thus right
Equipment heats.
Due to the fact that the primary gas phase heating agent of employing is heating source, and individually heated circular head 3 by heating agent, it is right to be greatly improved
The efficiency of heating surface of circular head 3；Avoid material to go out solidification at circular head, improve product quality, it is to avoid produce material phenomenon of collapsing.
Also setting up blow-down pipe 32 on the heating medium for heating chuck 31 of circular head, use long-time to heating agent causes the low molecule that cracking produces
Thing is fully vented, and improves heating.
The present invention also provides for a kind of heating medium for heating method of precondensation still, and described method includes: a single heating agent input pipe is in advance
The heater of polycondensation vessel import heats；Another heating agent input pipe 5 is by the circle of primary gas phase heating agent input heater inlet end
The heating medium for heating chuck 31 of end socket 3, heats circular head 3, and heating agent carries out heat exchange with the material in circular head 3
After, it is condensed into heating agent condensed fluid, by the heating agent condensed fluid outlet tube 6 connected bottom circular head 3 by heating agent condensed fluid input heat
Liquid sealing pipe 61 is set on matchmaker's condensed fluid outlet tube 6, increases heating agent to heat time heating time of circular head 3 and heating medium for heating chuck 31
Interior pressure, fully heats circular head 3, improves heating agent utilization ratio.After liquid sealing pipe 61 has been expired, heating agent condenses
Liquid stream backflash steaming pot 4, liquid phase heating agent is transferred to gas phase heating agent by flash tank 4, and gas phase heating agent is entered again by gas phase heating agent input pipe
Enter the heating medium for heating chuck of circular head.
Claims (6)
1. the heating medium for heating device of precondensation still, described precondensation still import is provided with heater, it is characterised in that: described heater
Connecting and have single heating source input pipe, the entrance point of heater is provided with circular head, and circular head is provided with heating medium for heating chuck,
The circular head of the heater of described precondensation still is also associated with heating agent flash tank, and described heating medium for heating chuck connects to be had individually
Gas phase heating agent input pipe, is provided with heating agent condensed fluid outlet tube bottom circular head, heating agent condensed fluid outlet tube is with heating agent flash tank even
Connecing, described gas phase heating agent input pipe is connected with heating agent flash drum overhead；Described heating agent condensed fluid outlet tube is provided with liquid sealing pipe.
The heating medium for heating device of precondensation still the most according to claim 1, it is characterised in that: described gas phase heating agent input pipe
The heating agent of middle input is primary gas phase heating agent.
The heating medium for heating device of precondensation still the most according to claim 1, it is characterised in that: the heating agent of described circular head
Heating jacket top is provided with two blow-down pipes.
The heating medium for heating device of precondensation still the most according to claim 3, it is characterised in that: the height of described liquid sealing pipe is
10-15 rice.
5. apply a heating medium for heating method for the heating medium for heating device of the described precondensation still of one of claim 1-4, its feature
It is: described method includes: the heater of precondensation still import is heated by a single heating source input pipe；Gas phase heating agent
Circular head, by the heating medium for heating chuck of the circular head of primary gas phase heating agent input heater inlet end, is heated by input pipe,
After heating agent carries out heat exchange with the material in circular head, it is condensed into heating agent condensed fluid, cold by the heating agent connected bottom circular head
Lime set outlet tube is transported to flash tank, and liquid phase heating agent is transferred to gas phase heating agent by flash tank, and gas phase heating agent passes through gas phase heating agent input pipe
It is again introduced into the heating medium for heating chuck of circular head.
Heating medium for heating method the most according to claim 5, it is characterised in that: the heating agent condensed fluid in described circular head is first
Entering the liquid sealing pipe arranged on heating agent condensed fluid outlet tube, after liquid sealing pipe has been expired, heating agent condensed fluid flows back to flash tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510001667.8A CN104549096B (en) | 2015-01-05 | 2015-01-05 | The heating medium for heating device of precondensation still and heating means |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510001667.8A CN104549096B (en) | 2015-01-05 | 2015-01-05 | The heating medium for heating device of precondensation still and heating means |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104549096A CN104549096A (en) | 2015-04-29 |
| CN104549096B true CN104549096B (en) | 2016-11-23 |
Family
ID=53066808
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510001667.8A Expired - Fee Related CN104549096B (en) | 2015-01-05 | 2015-01-05 | The heating medium for heating device of precondensation still and heating means |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104549096B (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2799067Y (en) * | 2004-09-29 | 2006-07-26 | 上海聚友化工有限公司 | Circulatory heating system for chemical process |
| CN1279082C (en) * | 2005-06-06 | 2006-10-11 | 北京英诺威逊聚合技术有限公司 | New type non-agitating multiplayer pre-polycondensation kettle for polyester |
| JP2011183342A (en) * | 2010-03-10 | 2011-09-22 | Sumitomo Chemical Co Ltd | Control method in chemical process |
| CN203938629U (en) * | 2014-07-21 | 2014-11-12 | 金晖兆隆高新科技有限公司 | The production unit of poly butylene succinate |
-
2015
- 2015-01-05 CN CN201510001667.8A patent/CN104549096B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN104549096A (en) | 2015-04-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106268591B (en) | A kind of polymerization reaction kettle and method for making polyester | |
| CN108570148A (en) | A kind of anti-oxidation nylon 6 slice polymerization production device and method | |
| CN103756704B (en) | System for producing modified coal tar pitch and preparation method thereof | |
| CN105903424A (en) | Multilayer falling pipe type falling film devolatilization reactor | |
| JP2016511781A (en) | Reactor with vertical condensing tube and process for polymerizing polyamide in such reactor | |
| CN104549096B (en) | The heating medium for heating device of precondensation still and heating means | |
| CN203971901U (en) | A kind of solid melting device | |
| CN105561905B (en) | A kind of kettle system of fat polymerization two | |
| CN109529389A (en) | A kind of device, system and the technique of formaldehyde concentration | |
| CN208771389U (en) | Continuous reaction apparatus and system | |
| CN205650186U (en) | Two cauldron systems of polymerization esterify | |
| CN205815656U (en) | Falling liquid film melt polycondensation reaction device between a kind of one-tenth comb | |
| CN103627518B (en) | Soapmaking castor oil dewatering system | |
| CN105080463B (en) | For the polycondensation reactor in the accomplished continuously or intermittently process units of production of polyester | |
| CN209333242U (en) | A kind of crystallizer for Melamine Production | |
| CN205653385U (en) | Polymerization system esterifies | |
| CN206391592U (en) | It is a kind of to be used for the thin film evaporator of 4,4 dichloro diphenyl sulfones processing | |
| CN209952809U (en) | Glyceryl triacetate tubular reactor | |
| CN209371222U (en) | A kind of deaerating type of cycles of boiler feedwater | |
| CN208398687U (en) | A kind of input and output material heat exchanger | |
| CN207313499U (en) | A kind of device using biomass material rapid polymerization humic acid | |
| CN205995062U (en) | A kind of annular bellows tube falling film evaporator for pharmaceuticals industry | |
| CN206762867U (en) | A kind of reactor heater | |
| CN205650187U (en) | Esterify and get together two cauldron devices | |
| CN102516510B (en) | Dimple jacket-type prepolymerization vessel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| 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: 20161123 Termination date: 20180105 |