CN106700054A - Vacuum-pumping device for PBT (Polybutylene Terephthalate) vacuum polymerization device - Google Patents
Vacuum-pumping device for PBT (Polybutylene Terephthalate) vacuum polymerization device Download PDFInfo
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- CN106700054A CN106700054A CN201611191560.5A CN201611191560A CN106700054A CN 106700054 A CN106700054 A CN 106700054A CN 201611191560 A CN201611191560 A CN 201611191560A CN 106700054 A CN106700054 A CN 106700054A
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- Prior art keywords
- vacuum
- tube
- vacuum tube
- pbt
- fixture
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Classifications
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- 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
- C08G63/785—Preparation processes characterised by the apparatus used
-
- 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
Abstract
The invention discloses a vacuum-pumping device for a PBT (Polybutylene Terephthalate) vacuum polymerization device. The vacuum-pumping device comprises a vacuum tube, wherein the vacuum tube is connected with a vacuum pump; a water vapor collecting device and a gas back-streaming preventing device are arranged in sequence on the vacuum tube; one end of the vacuum tube is connected with a reaction kettle arranged on a frame body through a sealing flange; the vacuum tube is provided with a vacuum meter for displaying a vacuum degree in the reaction kettle; the vacuum tube behind the vacuum meter is provided with a main valve; the main valve is positioned in front of the water vapor collecting device. The vacuum degree in the reaction kettle is displayed through the vacuum meter, and an operator adjusts the vacuum degree in the reaction kettle according to an actual demand, so that the vacuum degree in the reaction kettle can be raised gradually; water vapor is absorbed through the water vapor collecting device, so that the vacuum pump is prevented from failing, and the service life of the vacuum pump is prolonged; the gas back-streaming preventing device has the function of preventing back streaming of gas and vacuum leakage under the condition of abnormal drop-dead halt, so that material waste is avoided.
Description
Technical field
The present invention relates to PBT production equipment technical fields, more particularly to a kind of PBT vacuum polymerizations device vacuum means
Put.
Background technology
The molecular weight and yield of PBT polymerizates progressively increase, reach polymerisation terminal time need it is very long, to keep away
Exempt from material and undergo long-time high-temperature oxydation, whole polymerization process is required for being carried out under decompression and nitrogen protection.To accelerate
Condensation polymerization speed is net by small molecule by-product removing, it is necessary to step up vacuum, reaction is balanced to polymerizate direction
Carry out.Polymerization initial stage, polymer molecular weight is relatively low, and system viscosity is not high, stirring, mixing, heat transfer, mass transfer (low molecule accessory substance
Discharge) etc. it is not difficult；Polymerization later stage, melt viscosity may be up to hundreds of Pa Secs, transmit extremely difficult.Asked to solve this
Topic, is industrially vacuumized using different operating methods to different monomers, it is necessary to be classified, and the polymerization later stage is needed in Gao Zhen
Operated under reciprocal of duty cycle, to improve molecular weight.And vacuumizing the vavuum pump for using such as can not effectively extract steam steam excavationg pump
Chamber, then steam will condense in pump chamber.This will cause vacuum pump lubricating oilses generation emulsion deterioration to have a strong impact on vavuum pump to be reached
The limiting pressure for arriving, greasy property declines, abrasion aggravation, it is impossible to normal work, or even will cause the parts such as the pump housing and rotor
The serious corrosion of generation, causes whole machine to scrap, the phenomenon, meeting such as gas backstreaming, vacuum leak in the case of improper unexpected shutdown
The material polymerisation in reactor is had a strong impact on, so as to cause the material waste in reactor.Therefore for PBT vacuum polymerizations
The requirement of device vacuum extractor is that elevated vacuum step by step can be reached in reactor, and possesses and can prevent in anon-normal
Gas backstreaming, the function of vacuum leak in the case of often shutting down suddenly.
Through retrieval, Chinese patent Authorization Notice No. CN202220146U, authorized announcement date are special for the invention of 2012.05.16
Profit discloses a kind of PBT vacuum polymerizations device pumped vacuum systems, including reactor, and the reactor is described on a support
Reactor stretches out a vacuum tube, and the vacuum tube is connected with a vavuum pump, and the vavuum pump is provided with blast pipe.Use single vacuum
Pump is individually vacuumized to single reactor.
Chinese patent Authorization Notice No. CN202570176U, the disclosure of the invention of authorized announcement date 2012.12.05 are a kind of double
Vacuum extractor in cone revolution vacuum reaction kettle, belongs to chemical mechanical equipment technical field.It includes vacuum sealing head, takes out true
Blank pipe road and vavuum pump, be arranged in reactor inner chamber vacuum sealing head by be connected vacuumize filter, straight-tube portion and
Base is constituted, and straight-tube portion is connected through the centre bore of base with vacuum-pumping pipeline, and vacuum-pumping pipeline is connected with vavuum pump, base
Stuffing-box is formed between vacuum-pumping pipeline and filler is housed, gland compresses filler from outside.Vacuum sealing head is directly
Stretch into inside reactor, packing seal structure is provided between the base and vacuum-pumping pipeline of vacuum extractor, reveal
When, easily find in time, it is only necessary to eliminate leakage by compressing filler.
Above-mentioned two pieces patent cannot preferably keep that elevated vacuum step by step can be reached in reactor, it is impossible to inhale
Vapor is received, does not possess gas backstreaming, the function of vacuum leak that can be prevented in the case of improper unexpected shutdown.
The content of the invention
It is contemplated that at least solving one of technical problem in correlation technique to a certain extent.Therefore, of the invention
One purpose is to propose a kind of PBT vacuum polymerizations device vacuum extractor, can be reached in holding reactor and raised step by step
Vacuum, vapor can be absorbed, increase the service life, possessing can prevent gas in the case of improper unexpected shutdown from returning
Stream, the function of vacuum leak, it is to avoid material waste.
A kind of PBT vacuum polymerizations device vacuum extractor according to embodiments of the present invention, including vacuum tube, the vacuum
Pipe is connected with vavuum pump, and vapor collection device, anti-gas reflux apparatus are sequentially provided with vacuum tube；
One end of the vacuum tube is connected by sealing flange with the reactor being arranged on support body, is set on the vacuum tube
There is the vacuum meter for showing vacuum in reactor, the vacuum tube after the vacuum meter is provided with total valve, the total valve
Before vapor collection device；
The vapor collection device includes condenser pipe and collecting tank, and the condenser pipe is set on vacuum tube, the receipts
Collection tank is arranged on the lower section of vacuum tube and is connected with vacuum tube；
The anti-gas reflux apparatus includes connecting tube, fixture, movable part, and two ends and the vacuum tube of the connecting tube connect
Logical, the fixture is fixed in connecting tube, and the fixture is provided with upper gas passage and lower gas passage, it is described under
The outlet of portion's gas passage is hinged with a catch, is provided with step between the upper gas passage and lower gas passage, institute
State and slope is provided with above upper gas passage, the movable part is arranged in fixture and is slidably matched with fixture, activity
One end of part is engaged with the step and ramp shaped of the fixture, and this one end of movable part is provided with sealant, described
The rear end of fixture is protruding with the locating part for limiting movable part activity.
In some embodiments of the invention, the vavuum pump is provided with blast pipe.
In some embodiments of the invention, the bottom of the collecting tank is provided with drainpipe, and the drainpipe is provided with valve
Door.
In some embodiments of the invention, the top in the fixture is provided with the slide rail slided for movable part.
In other embodiments of the invention, also including screen pack, the screen pack is arranged in vacuum tube near total
One end of valve.
In the present invention, the vacuum in reactor is shown by vacuum meter, and operating personnel adjust reaction according to actual needs
Vacuum in kettle, keeps that in reactor elevated vacuum step by step can be reached, and vapor is absorbed by vapor collection device,
Avoid causing vacuum pump failure, increase the service life, anti-gas reflux apparatus possesses can be prevented in improper unexpected shutdown situation
Under gas backstreaming, the function of vacuum leak, it is to avoid material waste.
Brief description of the drawings
Accompanying drawing is used for providing a further understanding of the present invention, and constitutes a part for specification, with reality of the invention
Applying example is used to explain the present invention together, is not construed as limiting the invention.In the accompanying drawings：
Fig. 1 is a kind of structural representation of PBT vacuum polymerizations device vacuum extractor proposed by the present invention；
Fig. 2 is the structural representation of vapor collection device；
Fig. 3 is the structural representation of anti-gas reflux apparatus；
Fig. 4 is the enlarged drawing at A positions.
In figure：1 vacuum tube, 2 vavuum pumps, 21 blast pipes, 3 vapor collection devices, 31 condenser pipes, 32 collecting tanks, 321 rows
Water pipe, 4 anti-gas reflux apparatus, 41 connecting tubes, 42 fixtures, 421 upper gas passages, 422 lower gas passages, 423 gears
Piece, 424 steps, 425 slopes, 426 locating parts, 43 movable parts, 431 sealants, 5 support bodys, 6 reactors, 7 vacuum meters, 8 main valves
Door.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.
The example of the embodiment is shown in the drawings, wherein same or similar label represents identical or class from start to finish
As element or the element with same or like function.Embodiment below with reference to Description of Drawings is exemplary, purport
For explaining the present invention, and it is not considered as limiting the invention.
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", " on ", D score, "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outward ", " up time
The orientation or position relationship of the instruction such as pin ", " counterclockwise ", " axial direction ", " radial direction ", " circumference " be based on orientation shown in the drawings or
Position relationship, is for only for ease of the description present invention and simplifies description, must rather than the device or element for indicating or imply meaning
With specific orientation, with specific azimuth configuration and operation, therefore must be not considered as limiting the invention.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or implying relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or
Implicitly include one or more this feature.In the description of the invention, " multiple " is meant that two or more,
Unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be fixedly connected, or be detachably connected, or integrally；Can be that machinery connects
Connect, or electrically connect；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, can be in two elements
The connection in portion or two interaction relationships of element.For the ordinary skill in the art, can be according to specific feelings
Condition understands above-mentioned term concrete meaning in the present invention.
Reference picture 1-4, a kind of PBT vacuum polymerizations device vacuum extractor, including vacuum tube 1, the vacuum tube 1 with it is true
Empty pump 2 is connected, and vapor collection device 3, anti-gas reflux apparatus 4 are sequentially provided with vacuum tube 1；
One end of vacuum tube 1 is connected by sealing flange with the reactor 6 being arranged on support body 5, and vacuum tube 1 is provided with use
In the vacuum meter 7 of vacuum in display reactor 6, the vacuum tube 1 after vacuum meter 7 is provided with total valve 8, and total valve 8 is located at water
Before vapor collection device 3；
Vapor collection device 3 includes condenser pipe 31 and collecting tank 32, and condenser pipe 31 is set on vacuum tube 1, condenser pipe
It is spirality, inside is connected with cold water, and collecting tank 32 is arranged on the lower section of vacuum tube 1 and is connected with vacuum tube 1；
Anti- gas reflux apparatus 4 includes connecting tube 41, fixture 42, movable part 43, and the two ends of connecting tube 41 are by sealing
Flange is connected with vacuum tube 1, and fixture 42 is fixed in connecting tube 41, and fixture 42 is provided with upper gas passage 421 with
Portion's gas passage 422, the outlet of lower gas passage 422 is hinged with a catch 423, upper gas passage 421 and bottom gas
Step 424 is provided between body passage 422, the treatment of step rounding is easy to movable part to fit, the top of upper gas passage 421
Slope 425 is provided with, its angle of inclination is 30 °, and movable part 43 is arranged in fixture 42 and is slidably matched with fixture 42, activity
One end of part 43 is engaged with the step 424 of fixture 42 and the shape on slope 425, and this one end of movable part 43 is provided with and adopts
With the sealant 431 of quality of rubber materials, upper gas passage 421 and lower gas passage 422 can be completely blocked, it is ensured that sealing effect
Really, the rear end of fixture 42 is protruding with the locating part 426 for limiting the activity of movable part 43, the vavuum pump used in the present embodiment
The model that those skilled in the art commonly use is with the model of vacuum meter.
Wherein, vavuum pump 2 is provided with blast pipe 21, and the bottom of collecting tank 32 is provided with drainpipe 321, is set on drainpipe 321
There is valve, the top in fixture 42 is provided with the slide rail slided for movable part 43, and also including screen pack, screen pack is arranged on very
Near one end of total valve 8 in blank pipe 1, screen pack makees filter using metal sintering net, easily cleaning, and easily sterilization is gone out
Bacterium, and adapted high pure nitrogen blowback, prevent particulate dust from blocking filter mesh, it is ensured that vacuum is unimpeded.
Classification is needed to be vacuumized during PBT polymerisations, the polymerization later stage needs to be operated under condition of high vacuum degree, divides to improve
Son amount.Vacuum in reactor 6 shows that operating personnel adjust vacuum in reactor 6 according to actual needs by vacuum meter,
Keep that in reactor 6 elevated vacuum step by step can be reached.
And vacuumize the vavuum pump for using and such as can not effectively extract steam steam is discharged pump chamber, then steam will be condensed in
In pump chamber.This will cause vacuum pump lubricating oilses generation emulsion deterioration to have a strong impact on the vavuum pump limiting pressure to be reached, and lubricate
Hydraulic performance decline, abrasion aggravation, it is impossible to normal work, or even will cause the parts such as the pump housing and rotor that serious corrosion occurs, cause
Whole machine is scrapped, and vapor is absorbed using vapor collection device 3 in the present embodiment, and the vapor for making high temperature by condenser pipe 31 coagulates
Knot is collected in water droplet by collecting tank 32, the water that need to only close in the regular discharge collecting tank 32 of total valve 8, it is to avoid cause vacuum
The failure of pump 2, increases the service life.
The phenomenons such as gas backstreaming, vacuum leak in the case of improper unexpected shutdown, can have a strong impact in reactor
Material polymerisation, so as to cause the material waste in reactor 6, gas is avoided in the present embodiment using anti-gas reflux apparatus 4
Body flows back, and it includes connecting tube 41, fixture 42, movable part 43, during pumping, due to the pumping of vavuum pump 2 and lower gas passage
The stop of 422 exit catch 423, the air pressure on the right side of movable part 43 is relatively low, and movable part 43 is to the right under the promotion of draught head
Slide, upper gas passage 421 is connected with lower gas passage 422, complete pumping action；When gas backstreaming of breaking down
When, because the left side air pressure of movable part 43 is low, and lower gas passage 422 outlet be also sucked back into come catch 423 block, gas
Pressure difference makes movable part slide to the left, tightly blocks upper gas passage 421 and lower gas passage 422, due to sealant 431
Presence, good sealing effect, do not have gas leakage, gas backstreaming, the vacuum in the case of improper unexpected shutdown can be prevented
The phenomenon of leakage occurs, and is easy to on-call maintenance, it is to avoid material waste.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be with
It is the first and second feature directly contacts, or the first and second features are by intermediary mediate contact.And, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature are directly over second feature or oblique upper, or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is immediately below second feature or obliquely downward, or is merely representative of fisrt feature level height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means to combine specific features, structure, material or spy that the embodiment or example are described
Point is contained at least one embodiment of the invention or example.In this manual, to the schematic representation of above-mentioned term not
Necessarily refer to identical embodiment or example.And, the specific features of description, structure, material or feature can be any
One or more embodiments or example in combine in an appropriate manner.
The above, the only present invention preferably specific embodiment, but protection scope of the present invention is not limited thereto,
Any one skilled in the art the invention discloses technical scope in, technology according to the present invention scheme and its
Inventive concept is subject to equivalent or change, should all be included within the scope of the present invention.
Claims (5)
1. a kind of PBT vacuum polymerizations device vacuum extractor, it is characterised in that：Including vacuum tube, the vacuum tube and vacuum
Pump is connected, and vapor collection device, anti-gas reflux apparatus are sequentially provided with vacuum tube；
One end of the vacuum tube is connected by sealing flange with the reactor being arranged on support body, and the vacuum tube is provided with use
In the vacuum meter of vacuum in display reactor, the vacuum tube after the vacuum meter is provided with total valve, and the total valve is located at
Before vapor collection device；
The vapor collection device includes condenser pipe and collecting tank, and the condenser pipe is set on vacuum tube, the collecting tank
It is arranged on the lower section of vacuum tube and is connected with vacuum tube；
The anti-gas reflux apparatus includes connecting tube, fixture, movable part, and the two ends of the connecting tube connect with vacuum tube,
The fixture is fixed in connecting tube, and the fixture is provided with upper gas passage and lower gas passage, the bottom
The outlet of gas passage is hinged with a catch, and step is provided between the upper gas passage and lower gas passage, described
Slope is provided with above upper gas passage, the movable part is arranged in fixture and is slidably matched with fixture, movable part
One end be engaged with the step and ramp shaped of the fixture, and this one end of movable part is provided with sealant, described solid
The rear end for determining part is protruding with the locating part movable for limiting movable part.
2. a kind of PBT vacuum polymerizations device vacuum extractor according to claim 1, it is characterised in that：The vacuum
Pump is provided with blast pipe.
3. a kind of PBT vacuum polymerizations device vacuum extractor according to claim 1, it is characterised in that：The collection
The bottom of tank is provided with drainpipe, and the drainpipe is provided with valve.
4. a kind of PBT vacuum polymerizations device vacuum extractor according to claim 1, it is characterised in that：The fixation
Top in part is provided with the slide rail slided for movable part.
5. a kind of PBT vacuum polymerizations device vacuum extractor according to claim 1, it is characterised in that：Also included
Filter screen, the screen pack is arranged in vacuum tube near one end of total valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611191560.5A CN106700054B (en) | 2016-12-21 | 2016-12-21 | PBT vacuum polymerization device vacuum evacuation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611191560.5A CN106700054B (en) | 2016-12-21 | 2016-12-21 | PBT vacuum polymerization device vacuum evacuation device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106700054A true CN106700054A (en) | 2017-05-24 |
| CN106700054B CN106700054B (en) | 2019-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611191560.5A Active CN106700054B (en) | 2016-12-21 | 2016-12-21 | PBT vacuum polymerization device vacuum evacuation device |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009530202A (en) * | 2006-03-22 | 2009-08-27 | ヴィトップ モールディング ソシエタ ア レスポンサビリタ リミタータ | Liquid spout, especially for high-density liquid |
| CN202220146U (en) * | 2011-09-07 | 2012-05-16 | 江阴爱科森通信材料有限公司 | Vacuum pumping system for PBT (polybutylece terephthalate) vacuum polymerization device |
| CN104350316A (en) * | 2012-05-31 | 2015-02-11 | 石崎公司 | Check valve and hot water system |
| CN204911425U (en) * | 2015-09-02 | 2015-12-30 | 山东华诚高科胶粘剂有限公司 | Protection of reation kettle vacuum and buffer |
| CN105276243A (en) * | 2015-11-20 | 2016-01-27 | 许建林 | One-way valve and full-automatic self-suction water pump |
-
2016
- 2016-12-21 CN CN201611191560.5A patent/CN106700054B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009530202A (en) * | 2006-03-22 | 2009-08-27 | ヴィトップ モールディング ソシエタ ア レスポンサビリタ リミタータ | Liquid spout, especially for high-density liquid |
| CN202220146U (en) * | 2011-09-07 | 2012-05-16 | 江阴爱科森通信材料有限公司 | Vacuum pumping system for PBT (polybutylece terephthalate) vacuum polymerization device |
| CN104350316A (en) * | 2012-05-31 | 2015-02-11 | 石崎公司 | Check valve and hot water system |
| US20150122353A1 (en) * | 2012-05-31 | 2015-05-07 | Ishizaki Corporation | Check valve and pumping system |
| CN204911425U (en) * | 2015-09-02 | 2015-12-30 | 山东华诚高科胶粘剂有限公司 | Protection of reation kettle vacuum and buffer |
| CN105276243A (en) * | 2015-11-20 | 2016-01-27 | 许建林 | One-way valve and full-automatic self-suction water pump |
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| CN106700054B (en) | 2019-04-19 |
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