CN206604217U - The vacuum spray system of PTT process units - Google Patents
The vacuum spray system of PTT process units Download PDFInfo
- Publication number
- CN206604217U CN206604217U CN201720254938.5U CN201720254938U CN206604217U CN 206604217 U CN206604217 U CN 206604217U CN 201720254938 U CN201720254938 U CN 201720254938U CN 206604217 U CN206604217 U CN 206604217U
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- pdo
- reuse
- scraper condenser
- high temperature
- pipe
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- Polyesters Or Polycarbonates (AREA)
- Other Resins Obtained By Reactions Not Involving Carbon-To-Carbon Unsaturated Bonds (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The utility model is related to a kind of vacuum spray system of PTT process units, including scraper condenser and liquid seal trough, scraper condenser top is provided with cycle P DO mouth sprays, scraper condenser air inlet is connected with the exhaust outlet of batch condensation polymerization reactor, the media outlet of scraper condenser bottom is connected by barometric pipe pipe with the fluid-tight tube inlet of liquid seal trough, the filtrate (liquid of liquid seal trough is connected with reuse PDO pipes, reuse PDO pipes are connected by PDO filters with the entrance of reuse PDO delivery pumps, the outlet of reuse PDO delivery pumps is connected by reuse PDO coolers with cycle P DO mouth sprays, scraper condenser top is provided with fresh PDO mouth sprays, fresh PDO mouth sprays are connected with fresh PDO pipes and above cycle P DO mouth sprays.Vacuum tube is provided with annular high temperature PDO jets, and top is provided with high temperature PDO inlets.The bottom of scraper condenser is connected with two barometric pipe pipes, and the top of two barometric pipe pipes is connected with high temperature PDO pipes respectively.The system can avoid the blocking of oligomer, it is ensured that the continuous operation of spray system.
Description
Technical field
The utility model is related to a kind of PTT process units, more particularly to a kind of vacuum spray system of PTT process units,
Belong to polymer production plant technical field.
Background technology
Ptt fiber has than conventional polyester, polyamide fibre and acrylic fibers more excellent performance, has flexibility, the acrylic fibers of acrylic fibers concurrently
Bulkiness and terylene pollution resistance, the new chemical fibre material as great prospect.PTT is by PDO（1,3- propane diols）With to benzene
Dicarboxylic acid dimethyl ester（DMT）Melt polycondensation after ester exchange is carried out to form, or by PDO and terephthalic acid (TPA)（PTA）After direct esterification
Melt polycondensation forms.Rationally, flow is short, small investment for direct esterification production technology, and production efficiency is high, and environmental pollution is low, production
Safety, raw material and energy expenditure are low, therefore typically use direct esterification, and production of polyester is much like.The technique of direct esterification
Emphasis lies also in the stable operation of vacuum system.Need constantly to remove the small molecule in polycondensation vessel.
Production of polyester is very ripe, and current PTT vacuum spray systems all use the system similar with production of polyester.Contract
The process steam that poly- reaction is produced enters after scraper condenser, is sprayed by liquid phase, makes the small molecule of most of steam and entrainment
Condense out, enter liquid seal trough interior room by barometric pipe, mistress is entered after filtering, then by pump front filter, circulating pump
With pump aftercooler formation circulated sprinkling.
From unlike production of polyester, side reaction is especially more in PTT polymerization processes, the oligomer of generation is also a lot.
The DPG that is mainly produced by PDO etherification reactions and by beta-hydroxy propyl terephthalate（PDO and PTA monoesters）
The cyclic dimer of loop configuration formation, these oligomer, which easily solidify, easily blocks pipe-line equipment.
It is spray because barometric pipe pipeline enters medium if sprayed oligomer using traditional polyester spray system
Liquid is drenched, temperature is greatly lowered compared with process steam, and oligomer is easily gathered in barometric pipe pipeline, and causes barometric pipe to block；Spray
Drench liquid and finally all enter liquid seal can, the oligomer caught also fully enters liquid seal can, it is easy to blocks screen pack, causes back
It can not be recycled with PDO；The gaseous phase outlet of scraper condenser is temperature drastically change point, and oligomer easily adherent accumulation is led
Cause outlet less and less, it is final all to block；PDO pipeloops carry oligomer, and constantly circulation can be cumulative, serious drop
Low spraying effect；Scraper condenser outlet vapor pipeline accesses vavuum pump, easily deposits, results in blockage in low spot oligomer, with
Upper blocking is required to parking cleaning, influence production.Other part there is not the oligomer that seizure is got off to enter with process steam
Next stage vacuum pipe, when low spot or temperature are reduced, easily deposition or solidification, so as to block pipeline, cause vacuum to reach
Less than requiring, polycondensation reaction can not be carried out.
Utility model content
The purpose of this utility model is that overcoming problems of the prior art, there is provided a kind of the true of PTT process units
Empty spray system, the blocking that the circulative accumulation of oligomer can be avoided to cause.
To solve above technical problem, a kind of vacuum spray system of PTT process units of the present utility model, including scraper plate
Condenser and liquid seal trough, the top of the scraper condenser are provided with scraper condenser gaseous phase outlet, the scraper condenser gas phase
Outlet is connected by vacuum tube with vavuum pump, and the scraper condenser top is provided with cycle P DO mouth sprays, the scraper condenser
Air inlet be connected with the exhaust outlet of batch condensation polymerization reactor, the media outlet of the scraper condenser bottom passes through barometric pipe pipe and institute
The fluid-tight tube inlet for stating liquid seal trough is connected, and the liquid seal trough filtrate (liquid of the liquid seal trough is connected with reuse PDO pipes, the reuse
PDO pipes are connected by PDO filters with the entrance of reuse PDO delivery pumps, and the outlet of the reuse PDO delivery pumps passes through reuse
PDO coolers are connected with the cycle P DO mouth sprays, and the scraper condenser top is provided with fresh PDO mouth sprays, described fresh
PDO mouth sprays are connected with fresh PDO pipes and above the cycle P DO mouth sprays.
Relative to prior art, the utility model achieves following beneficial effect：The process steam that batch condensation polymerization reactor is produced
Into after scraper condenser, the liquid phase spray through cycle P DO mouth sprays and fresh PDO mouth sprays makes most of steam and entrainment
Small molecule condense out, the interior room of liquid seal trough is entered by barometric pipe, mistress is entered after being filtered through cartridge filter, then by reuse
PDO is managed and PDO filters enter reuse PDO delivery pumps, and the reuse PDO that reuse PDO conveyings are pumped out is cold through reuse PDO coolers
But after, cycle P DO mouth sprays is returned to and carry out circulated sprinkling.Fresh PDO mouth sprays are set in scraper condenser upper end, can be prevented
Reuse PDO spray liquids carry excessive oligomer, cause the circulative accumulation of oligomer.
Improved as of the present utility model, the vacuum tube is provided with can form the annular of annular biofilm in vacuum inside pipe wall
High temperature PDO jets, the annular high temperature PDO jets are located at the top of the scraper condenser gaseous phase outlet and and high temperature
PDO pipes are connected.Scraper condenser gaseous phase outlet is temperature drastically change point, and oligomer easily adherent accumulation causes outlet more next
It is smaller, high temperature PDO is injected by annular high temperature PDO jets, can prevent oligomer from being accumulated at scraper condenser gaseous phase outlet
It is poly-, prevent the position from blocking.
As further improvement of the utility model, the vacuum tube is in the top of the scraper condenser provided with upward bow
The arc section risen, the highest point of the arc section is provided with high temperature PDO inlets, the high temperature PDO inlets and high temperature PDO pipe phases
Even.The high temperature PDO parts injected from high temperature PDO inlets flow to scraper condenser gaseous phase outlet, prevent scraper condenser
This section of vacuum blockage at the top of gaseous phase outlet to arc section；Downstream flow from another part high temperature PDO to arc section, in high temperature
With gasify rapidly in the presence of vacuum system, the oligomer for being bonded at inner-walls of duct is decomposed, arc section downstream line is prevented
Block.
As further improvement of the utility model, the liquid seal trough is provided with the mutually isolated Room of left and right two, the Room of left and right two
The fluid-tight tube inlet and the liquid seal trough filtrate (liquid are respectively equipped with, fluid-tight tube inlet is each via the barometric pipe described in two
Pipe is connected with the media outlet of the scraper condenser bottom, and liquid seal trough filtrate (liquid described in two is managed with the reuse PDO respectively
It is connected.Two barometric pipe pipes are set, a preparation and a use of barometric pipe pipe is realized, once a certain blocks, can enable in addition
A piece barometric pipe pipe, is prevented because of cleaning of being stopped caused by the failure.
As further improvement of the utility model, the top of the barometric pipe pipe is connected with high temperature PDO pipes respectively.Big
The top injection high temperature PDO of air leg pipe can avoid oligomer from being gathered in the inwall of barometric pipe pipe, it is to avoid barometric pipe blockage.
As further improvement of the utility model, the filter cylinder bottom of the Room of described liquid seal trough or so two passes through blow-off pipe respectively
It is connected with wash-up tray.The oligomer of the Room filter cylinder retention of liquid seal trough or so two can be discharged into wash-up tray each via blow-off pipe.
Brief description of the drawings
The utility model is described in further detail with reference to the accompanying drawings and detailed description, accompanying drawing only provides ginseng
Examine and used with explanation, be not used to limit the utility model.
Fig. 1 is the flow chart of the vacuum spray system of the utility model PTT process units.
Fig. 2 is the structural representation of annular high temperature PDO jets.
Fig. 3 is Fig. 2 top view.
In figure：1. batch condensation polymerization reactor；2. scraper condenser；2a. scraper condenser gaseous phase outlets；2b. cycle Ps DO is sprayed
Mouthful；The fresh PDO mouth sprays of 2c.；3. liquid seal trough；3a. fluid-tight tube inlets；3b. liquid seal trough filtrate (liquids；4.PDO filters；5. time
Use PDO coolers；G1. vacuum tube；G1a. annular high temperature PDO jets；G1b. high temperature PDO inlets；G2. barometric pipe pipe；G3.
Fresh PDO pipes；G4. high temperature PDO is managed；G5. reuse PDO is managed；B1. vavuum pump；B2. reuse PDO delivery pumps.
Embodiment
As shown in Figure 1 to Figure 3, the vacuum spray system of PTT process units of the present utility model includes the He of scraper condenser 2
Liquid seal trough 3, the top of scraper condenser 2 is provided with scraper condenser gaseous phase outlet 2a, and scraper condenser gaseous phase outlet 2a passes through true
Blank pipe G1 is connected with vavuum pump B1, the top of scraper condenser 2 be provided with cycle P DO mouth spray 2b, the air inlet of scraper condenser 2 with
The exhaust outlet of batch condensation polymerization reactor 1 is connected, and the media outlet of the bottom of scraper condenser 2 passes through barometric pipe pipe G2 and the liquid of liquid seal trough 3
Tube sealing entrance 3a is connected, and the liquid seal trough filtrate (liquid 3b of liquid seal trough 3 is connected with reuse PDO pipes G5, and reuse PDO pipes G5 passes through PDO
Filter 4 is connected with reuse PDO delivery pumps B2 entrance, reuse PDO delivery pumps B2 outlet by reuse PDO coolers 5 with
Cycle P DO mouth sprays 2b be connected, the top of scraper condenser 2 be provided with fresh PDO mouth sprays 2c, fresh PDO mouth sprays 2c with it is fresh
PDO pipes G3 is connected and above cycle P DO mouth sprays 2b.
The process steam that batch condensation polymerization reactor 1 is produced enters after scraper condenser 2, through cycle P DO mouth sprays 2b and fresh PDO
Mouth spray 2c liquid phase spray, condenses out the small molecule of most of steam and entrainment, enters liquid seal trough 3 by barometric pipe
Interior room, enters mistress after being filtered through cartridge filter, then enters reuse PDO delivery pump B2 by reuse PDO pipe G5 and PDO filter 4,
After the reuse PDO that reuse PDO delivery pumps B2 is sent out is cooled down through reuse PDO coolers 5, return to cycle P DO mouth sprays 2b and followed
Ring spray is drenched.Fresh PDO mouth sprays 2c is set in the upper end of scraper condenser 2, can prevent reuse PDO spray liquids from carrying excessive oligomeric
Thing, causes the circulative accumulation of oligomer.
Vacuum tube G1 is high provided with that can form the annular high temperature PDO jet G1a of annular biofilm, annular in vacuum inside pipe wall
Warm PDO jets G1a is located at scraper condenser gaseous phase outlet 2a top and is connected with high temperature PDO pipes G4.Scraper condenser gas
Mutually outlet 2a is temperature drastically change point, and oligomer easily adherent accumulation causes outlet less and less, passes through annular high temperature PDO
Jet G1a injects high temperature PDO, can prevent oligomer from being gathered at scraper condenser gaseous phase outlet 2a, prevents the position from blocking up
Plug.
Vacuum tube is provided with the arc section arched upwards in the top of scraper condenser 2, and the highest point of arc section is provided with high temperature
PDO inlet G1b, high temperature PDO inlets G1b are connected with high temperature PDO pipes G4.The high temperature injected from high temperature PDO inlets G1b
A PDO parts flow to scraper condenser gaseous phase outlet 2a, prevent scraper condenser gaseous phase outlet 2a at the top of arc section this
Section vacuum blockage；Another part high temperature PDO is to the downstream flow of arc section, the rapid gas in the presence of high temperature and vacuum system
Change, the oligomer for being bonded at inner-walls of duct is decomposed, the blocking of arc section downstream line is prevented.
Liquid seal trough 3 is provided with the mutually isolated Room of left and right two, and the Room of left and right two is respectively equipped with fluid-tight tube inlet 3a and liquid seal trough filter
Liquid exports 3b, and two fluid-tight tube inlet 3a are connected each via barometric pipe pipe G2 with the media outlet of the bottom of scraper condenser 2, two liquid
Sealing groove filtrate (liquid 3b is connected with reuse PDO pipes G5 respectively.Two barometric pipe pipe G2 are set, the one of barometric pipe pipe G2 are realized for one
With, once a certain blocks, an other barometric pipe pipe can be enabled, prevent because caused by the failure stop cleaning.
Barometric pipe pipe G2 top is connected with high temperature PDO pipes G4 respectively.Can in barometric pipe pipe G2 top injection high temperature PDO
To avoid oligomer from being gathered in barometric pipe pipe G2 inwall, it is to avoid barometric pipe pipe G2 is blocked.
The filter cylinder bottom of the Room of liquid seal trough 3 or so two is connected by blow-off pipe with wash-up tray respectively.Filter the Room of liquid seal trough 3 or so two
The oligomer of cylinder retention can be discharged into wash-up tray each via blow-off pipe.
It the foregoing is only the preferable possible embodiments of the utility model, non-therefore limitation patent of the present utility model
Protection domain.In addition to the implementation, the utility model can also have other embodiment, all use equivalent substitutions or equivalent change
The technical scheme to be formed is changed, in the protection domain for all falling within the utility model requirement.Technology of the utility model without description is special
Levying can realize by or using prior art, will not be repeated here.
Claims (6)
1. a kind of vacuum spray system of PTT process units, including scraper condenser and liquid seal trough, the top of the scraper condenser
Portion is provided with scraper condenser gaseous phase outlet, and the scraper condenser gaseous phase outlet is connected by vacuum tube with vavuum pump, described to scrape
Plate condenser top is provided with cycle P DO mouth sprays, and the air inlet of the scraper condenser is connected with the exhaust outlet of batch condensation polymerization reactor,
The media outlet of the scraper condenser bottom is connected by barometric pipe pipe with the fluid-tight tube inlet of the liquid seal trough, the fluid-tight
The liquid seal trough filtrate (liquid of groove is connected with reuse PDO pipes, and the reuse PDO pipes pass through PDO filters and reuse PDO delivery pumps
Entrance is connected, and the outlet of the reuse PDO delivery pumps is connected by reuse PDO coolers with the cycle P DO mouth sprays, and it is special
Levy and be：The scraper condenser top is provided with fresh PDO mouth sprays, the fresh PDO mouth sprays and fresh PDO manage be connected and
Above the cycle P DO mouth sprays.
2. the vacuum spray system of PTT process units according to claim 1, it is characterised in that：Set on the vacuum tube
There are the annular high temperature PDO jets that annular biofilm can be formed in vacuum inside pipe wall, the annular high temperature PDO jets are located at described
The top of scraper condenser gaseous phase outlet and with high temperature PDO pipe be connected.
3. the vacuum spray system of PTT process units according to claim 1, it is characterised in that：The vacuum tube is in institute
The top for stating scraper condenser is provided with the arc section arched upwards, and the highest point of the arc section is provided with high temperature PDO inlets, institute
High temperature PDO inlets are stated with high temperature PDO pipes to be connected.
4. the vacuum spray system of the PTT process units according to claim 1 or 2 or 3, it is characterised in that：The fluid-tight
Groove is provided with the mutually isolated Room of left and right two, and the Room of left and right two is respectively equipped with the fluid-tight tube inlet and the liquid seal trough filtrate (liquid,
Fluid-tight tube inlet described in two is connected each via the barometric pipe pipe with the media outlet of the scraper condenser bottom, described in two
Liquid seal trough filtrate (liquid is connected with reuse PDO pipes respectively.
5. the vacuum spray system of PTT process units according to claim 4, it is characterised in that：The barometric pipe pipe
Top is connected with high temperature PDO pipes respectively.
6. the vacuum spray system of PTT process units according to claim 4, it is characterised in that：Described liquid seal trough or so
The filter cylinder bottom of two Room is connected by blow-off pipe with wash-up tray respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720254938.5U CN206604217U (en) | 2017-03-16 | 2017-03-16 | The vacuum spray system of PTT process units |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720254938.5U CN206604217U (en) | 2017-03-16 | 2017-03-16 | The vacuum spray system of PTT process units |
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| Publication Number | Publication Date |
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| CN206604217U true CN206604217U (en) | 2017-11-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720254938.5U Active CN206604217U (en) | 2017-03-16 | 2017-03-16 | The vacuum spray system of PTT process units |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110961033A (en) * | 2019-12-09 | 2020-04-07 | 中国石油天然气集团有限公司 | High-stability high-vacuum method and high-vacuum system suitable for polycarbonate production |
-
2017
- 2017-03-16 CN CN201720254938.5U patent/CN206604217U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110961033A (en) * | 2019-12-09 | 2020-04-07 | 中国石油天然气集团有限公司 | High-stability high-vacuum method and high-vacuum system suitable for polycarbonate production |
| CN110961033B (en) * | 2019-12-09 | 2023-12-29 | 中国石油天然气集团有限公司 | High-stability high-vacuum method and high-vacuum system suitable for polycarbonate production |
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Address after: No. 301, Wangjiang Road, economic and Technological Development Zone, Yangzhou City, Jiangsu Province Patentee after: Yangzhou Huitong Technology Co.,Ltd. Address before: No. 301, Wangjiang Road, economic and Technological Development Zone, Yangzhou City, Jiangsu Province Patentee before: YANGZHOU HUITONG CHEMICAL TECHNOLOGY Co.,Ltd. |