CN102775589A - Polyester process tower system - Google Patents
Polyester process tower system Download PDFInfo
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- CN102775589A CN102775589A CN2012102943947A CN201210294394A CN102775589A CN 102775589 A CN102775589 A CN 102775589A CN 2012102943947 A CN2012102943947 A CN 2012102943947A CN 201210294394 A CN201210294394 A CN 201210294394A CN 102775589 A CN102775589 A CN 102775589A
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- 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
- Y02P20/10—Process efficiency
Abstract
The invention discloses a polyester process tower system, which comprises a tower body and tower trays, wherein twenty layers of tower trays in all are provided; counted from the bottom to top, the first to the seventeenth layers of tower trays are the float valve tower trays; the eighteenth to the twentieth layers are the Pall ring filler; and a steam outlet is arranged on the upper end of the tower body. Through simple equipment modification and optimization of the key point process parameters, the production is stable, the energy is saved, the consumption is reduced, the process steam can be recycled continuously, the process tower top pressure and the temperature are decreased, the EG (Ethylene Glycol) content in waste water is reduced, the COD (Chemical Oxygen Demand) content in waste water at the tower top is reduced, the steam hot water is stable in temperature, the normal stable operation of two large calorie refrigerating machines of 2500 thousand is met, the waste water COD is reduced, the EG content at the tower top is reduced, the investment is saved, and thus the system is energy-saving and environment-friendly.
Description
Technical field
The present invention relates to the production of polyester field, particularly relate to the lower polyester process Tower System of a kind of tower top pressure.
Background technology
The polyester process Tower System is an equipment very important in the production of polyester, and its effect is that the mixture to terepthaloyl moietie (EG) and water separates, and its separating effect will directly influence the height of normally carrying out of esterification and raw material consumption; The mixing steam of EG and water gets in the tower; Through the heating agent heating, EG is because boiling point is higher than water, and mixing steam is through the exchange of 20 layers of tower tray; EG concentrates at the bottom of the tower in a large number, and water vapor concentrates on cat head in a large number.In the existing polyester device; Process tower is designed to 20 layers of valve tray column, and the overhead vapours lime set gets into esterification water condensation jar through pipeline, and the technology overhead vapours is utilized again; Be used for the running of other equipment of factory (like the kilocalorie refrigerator of general facilities portion) behind general about 80% steam heat-exchanging; About 20% is used as plant area's life heat supply etc., and the liquid after the heat exchange gets into esterification water condensation jar, and the process tower pressure is 1.3KPa.
After the heat exchange of technology overhead vapours through other equipment of supply factory and life heat supply; Lime set gets into below the liquid level of esterification water condensation jar; Because life heat demand amount is unstable; Cause flowing back into to exist in the pipeline of esterification water condensation jar not being condensed into liquid steam, and ducted steam can cause that pipeline is not smooth, causes the pressure of technology cat head to raise.
In sum, the main drawback used aborning of above-mentioned polyester process Tower System is:
The technology tower top pressure is high, temperature is high, COD content is high in the waste water, and the process tower operating mode is unstable, does not reach energy-saving and cost-reducing best effect.The hot-water system temperature is unstable behind the steam heat-exchanging, causes general facilities refrigerator job insecurity.
Summary of the invention
It is lower to the purpose of this invention is to provide a kind of tower top pressure, and can satisfy overhead vapours and utilize again, and stable polyester process Tower System.
For realizing the foregoing invention purpose, technical scheme provided by the present invention is:
A kind of polyester process Tower System comprises tower body, tower tray, and totally two ten layers of said tower trays calculate from bottom to up, and 17 layers of tower tray of the first layer to the are valve tray, and the 18 layer to the 20 layer is the Pall ring filler, and said tower body upper end is provided with vapour outlet.
Further; Also comprise esterification water condensation jar, article one pipeline of said esterification water condensation jar through arranging side by side, the second pipeline links to each other with vapour outlet with the 3rd pipeline; Said article one pipeline is provided with first interchanger; Said second pipeline is provided with second interchanger, and said the 3rd pipeline is provided with air-cooler, is provided with first variable valve between said air-cooler and the vapour outlet.
Further, the second pipeline between said second interchanger and the esterification water condensation jar is provided with blow-down pipe, and said blow-down pipe is arranged on the exit of second interchanger, and the top of blow-down pipe is higher than the tower body top.
Further, said first variable valve is a pneumatic adjusting valve.
Further, said tower body is provided with mixing steam inlet and heating agent water back, and said mixing steam inlet and heating agent water back are arranged on the tower tray below.
Further, said tower tray bottom is provided with first temperature-detecting device.
Further; Said esterification water condensation jar bottom is provided with outlet conduit; Said outlet conduit gets into the inner tower tray top of tower body through pump and refrigerating unit successively; And between refrigerating unit and tower body top, be provided with second variable valve, said second variable valve links to each other with first temperature-detecting device.
Adopt technique scheme, beneficial effect of the present invention has:
(1) change the 18-20 layer into Pall ring filler, the Pall ring filler can increase heat interchanging area, helps the cooling performance of water coolant, and filler adds float valve and more helps EG and water sepn effect.
Second pipeline between (2) second interchanger and the esterification water condensation jar is provided with blow-down pipe; And the top of blow-down pipe is higher than the tower body top; Can not overflow phlegma when both having guaranteed ordinary production; Can at overhead vapours when not liquefying after utilizing again, discharge the not steam of liquefaction again, avoid consequent process tower hypertonia.
(3) between air-cooler and vapour outlet, variable valve is set, utilizes again through detection steam to obtain the switch that fluid temperature comes the regulating and controlling valve, both satisfied the demand that steam utilizes again, by having guaranteed the stable of process tower.
(4) the polyester process Tower System of employing technique scheme, tower top pressure remains on about 1.1KPa, about 1 ℃ of cat head steady decrease, sensitive tower tray temperature reduces about 20 ℃, and the process tower operating mode is stable.
Description of drawings
Fig. 1 structural representation of the present invention;
Fig. 2 is one embodiment of the invention synoptic diagram.
Wherein: 1 tower body, 2 tower trays, 21 valve trays, 22 Pall ring fillers, 3 vapour outlets; 4 esterification water condensation jars, 51 article one pipelines, 52 second pipelines, three pipelines in 53 ground, 61 first interchanger; 62 second interchanger, 7 air-coolers, 8 first variable valve, 9 blow-down pipes, 10 mixing steams inlet; 11 heating agent water backs, 13 first temperature-detecting devices, 14 outlet conduits, 16 refrigerating units, 17 second variable valve.
Embodiment
In order to make the object of the invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
Fig. 1 is a structural representation of the present invention, and is as shown in Figure 1, a kind of polyester process Tower System; Comprise tower body 1, tower tray 2, totally two ten layers of said tower trays 2 calculate from bottom to up; 17 layers of tower tray of the first layer to the are that valve tray 21, the is a Pall ring filler 22 for 18 layers to the 20 layer, and said tower body 1 upper end is provided with vapour outlet 3; Also comprise esterification water condensation jar 4, article one pipeline 51 of said esterification water condensation jar 4 through arranging side by side, second pipeline 52 links to each other with vapour outlet 3 with the 3rd pipeline 53; Said article one pipeline 51 is provided with first interchanger 61, and said second pipeline 52 is provided with second interchanger 62, and said the 3rd pipeline 53 is provided with air-cooler 7; Be provided with first variable valve 8 between said air-cooler 7 and the vapour outlet 3; Second pipeline 52 between said second interchanger 62 and the esterification water condensation jar 4 is provided with blow-down pipe 9, and said blow-down pipe 9 is arranged on the exit of second interchanger 62, and the top of blow-down pipe 9 is higher than tower body 1 top.
Polyester process Tower System provided by the present invention; First proofing unit detects the temperature of counting the layer 5 tower tray from bottom to up usually, controls second variable valve (like the dotted line of painting among Fig. 1) through the temperature variation of first temperature-detecting device, when the detected temperature of first proofing unit is higher than preset temperature; Second variable valve is opened; The outlet of esterification water in the esterification water condensation jar at the bottom of the jar flowed out, successively through pump and air-cooler, with refrigerative esterification water pump to tower body top; Flow down through tower tray, the temperature at the first proofing unit place is reduced.Be connected with second temperature-detecting device for the second interchanger place of other equipment heat supplies; Control the switching (like the dotted line of painting among Fig. 1) of first variable valve through the temperature variation at this place; When the temperature at the second temperature-detecting device place too during preset value; Explain that the steam air output of this thing is big or temperature is higher, this thing is opened first variable valve, and steam gets into esterification water condensation jar from the 3rd pipeline through air-cooler; Accelerate the steam velocity of discharge of vapour outlet, thereby reduce the temperature and pressure of cat head.
Fig. 2 is one embodiment of the invention synoptic diagram, and is as shown in Figure 2, and the tower body bottom is provided with the heating agent heating unit, is provided with temperature-detecting device in heating agent heating place; Controlled temperature is about 178 ℃, and the heating agent heating unit is provided with switch, when temperature is too high; The trip switch attemperation, heating agent heating unit top is provided with the mixing steam import, and the high temperature mixing steam of EG and water gets in the tower body from here; Through the heating of heating agent heating unit, rise along tower body, carry out heat exchange through valve tray and Pall ring filler tower tray; The heat interchanging area of Pall ring filler is greater than valve tray, and heat exchange efficiency is higher, makes EG and water disconnected from each other; Simultaneously between valve tray, be provided with near temperature-detecting device (being arranged in the present embodiment the 5th valve tray), the detection at any time temperature, cat head is provided with temperature-detecting device and pressure inspection car device.
After the heat exchange of steam process tower tray; Flow out from cat head; Flow out along three pipelines respectively; Article one, pipeline is used for hot water (more stable with heat in this pipeline) to plant area's medium power station lithium bromide refrigerating unit being provided, and is provided with temperature-detecting device to the interchanger rear, and the second pipeline is used for hot water (thermally labile is used in the living quarters) to the living quarters being provided; Article three, pipeline directly links to each other with esterification water condensation jar through the cold device that goes of air; Be used for discharging power station lithium bromide refrigerating unit and living quarters with the also remaining steam in heat back, this pipeline is provided with variable valve, when the detected temperature of temperature-detecting device at article one pipeline interchanger rear is higher than preset value (the temperature preset value is 90 ℃ in the present embodiment); Open variable valve or the aperture through PID regulating and controlling valve, make unnecessary steam be expelled to esterification water condensation jar from the 3rd pipeline.
After steam is supplied with power station lithium bromide refrigerating unit and living quarters heat supply, become liquid through the steam after the heat exchange and flow into esterification water condensation jar, pipeline directly passes to below the esterification water condensation jar liquid surface; Because thermally labile is used in the living quarters, possibly not liquefy lingering section steam in the pipeline fully through steam after the heat exchange in order to prevent the pipeline of supplying with the living quarters; It is not smooth to cause in pipeline, circulating, and then influences the pressure of technology cat head, causes the process tower tower top pressure to raise; Heat-exchanger rig rear at second pipeline is provided with blow-down pipe; The height of blow-down pipe is higher than the tower body height, in case the solution stopping body overflows, excess steam blow-down pipe is from here discharged.
Esterification water condensation pot bottom is provided with outlet conduit; Be connected with pump, refrigerating unit and valve on the pipeline, when the temperature of detected the 5th tower tray is too high, open valve; Phlegma flows out through pump and refrigerating unit from esterification water condensation jar; (adopting shower nozzle to spray) from tower tray top inflow tower body makes the tower tray temperature reduce (sensitive tower tray temperature is reduced to 108 ℃ by 128 ℃ in the present embodiment) more, guarantees that the process tower operating mode is stable.Also be provided with esterification water spillway on the top of esterification water condensation jar, the pipe connection in this exit to heating agent station stripping tower is discharged unnecessary esterification water-cooled lime set.
Polyester process Tower System provided by the present invention is transformed into float valve with valve tray column and adds Pall ring filler mixing column, and the phlegma liquid-inlet pipe changes blow-down pipe into; Simply transform through equipment; The emphasis process parameter optimizing, stably manufactured, energy-saving and cost-reducing, process steam utilizes continuously again.After the improvement, the technology tower top pressure drops to 1.1KPA by 1.3KPA, and tower top temperature drops to 100 ℃ by 100.9 ℃; EG content reduces 0.2% in the waste water, and cat head waste water COD content drops to about 2500 by 2900, and the steam and hot water water temperature is constant; Satisfy two the 2500000 normal smooth operations of kilocalorie refrigerator, waste water COD descends, the annual EG40-50 ton of approximately practicing thrift of cat head EG content decline content; Economize on the use of funds ten thousand yuan of 30-40, energy-conserving and environment-protective.
The above embodiment has only expressed embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to claim of the present invention.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the present invention's design, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with accompanying claims.
Claims (7)
1. a polyester process Tower System comprises tower body, tower tray, it is characterized in that: totally two ten layers of said tower trays; Calculate from bottom to up; 17 layers of tower tray of the first layer to the are valve tray, and the 18 layer to the 20 layer is the Pall ring filler, and said tower body upper end is provided with vapour outlet.
2. polyester process Tower System according to claim 1; It is characterized in that: also comprise esterification water condensation jar, article one pipeline of said esterification water condensation jar through arranging side by side, the second pipeline links to each other with vapour outlet with the 3rd pipeline; Said article one pipeline is provided with first interchanger; Said second pipeline is provided with second interchanger, and said the 3rd pipeline is provided with air-cooler, is provided with first variable valve between said air-cooler and the vapour outlet.
3. polyester process Tower System according to claim 2; It is characterized in that: the second pipeline between said second interchanger and the esterification water condensation jar is provided with blow-down pipe; Said blow-down pipe is arranged on the exit of second interchanger, and the top of blow-down pipe is higher than the tower body top.
4. polyester process Tower System according to claim 2 is characterized in that: said first variable valve is a pneumatic adjusting valve.
5. according to claim 1 or 3 described polyester process Tower Systems, it is characterized in that: said tower body is provided with mixing steam inlet and heating agent water back, and said mixing steam inlet and heating agent water back are arranged on the tower tray below.
6. according to claim 1 or 3 described polyester process Tower Systems, it is characterized in that: said tower tray bottom is provided with first temperature-detecting device.
7. according to claim 1 or 3 described polyester process Tower Systems; It is characterized in that: said esterification water condensation jar bottom is provided with outlet conduit; Said outlet conduit gets into the inner tower tray top of tower body through pump and refrigerating unit successively; And between refrigerating unit and tower body top, be provided with second variable valve, said second variable valve links to each other with first temperature-detecting device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210294394.7A CN102775589B (en) | 2012-08-17 | 2012-08-17 | Polyester process tower system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210294394.7A CN102775589B (en) | 2012-08-17 | 2012-08-17 | Polyester process tower system |
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| Publication Number | Publication Date |
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| CN102775589A true CN102775589A (en) | 2012-11-14 |
| CN102775589B CN102775589B (en) | 2014-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210294394.7A Active CN102775589B (en) | 2012-08-17 | 2012-08-17 | Polyester process tower system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103342807A (en) * | 2013-07-10 | 2013-10-09 | 浙江万凯新材料有限公司 | Stable structure of polyester process tower |
| CN110652946A (en) * | 2019-09-24 | 2020-01-07 | 安徽神剑新材料股份有限公司 | Top temperature control system and method in polyester resin production process |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1867607A (en) * | 2003-10-31 | 2006-11-22 | 乌德伊万塔-费希尔有限公司 | Tower reactor and use thereof for the continuous production of high molecular weight polyesters |
| JP2007254642A (en) * | 2006-03-24 | 2007-10-04 | Toyobo Co Ltd | Continuous polyester production apparatus and its operation method |
| CN202730048U (en) * | 2012-08-17 | 2013-02-13 | 江苏长乐纤维科技有限公司 | Polyester process tower system |
-
2012
- 2012-08-17 CN CN201210294394.7A patent/CN102775589B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1867607A (en) * | 2003-10-31 | 2006-11-22 | 乌德伊万塔-费希尔有限公司 | Tower reactor and use thereof for the continuous production of high molecular weight polyesters |
| JP2007254642A (en) * | 2006-03-24 | 2007-10-04 | Toyobo Co Ltd | Continuous polyester production apparatus and its operation method |
| CN202730048U (en) * | 2012-08-17 | 2013-02-13 | 江苏长乐纤维科技有限公司 | Polyester process tower system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103342807A (en) * | 2013-07-10 | 2013-10-09 | 浙江万凯新材料有限公司 | Stable structure of polyester process tower |
| CN110652946A (en) * | 2019-09-24 | 2020-01-07 | 安徽神剑新材料股份有限公司 | Top temperature control system and method in polyester resin production process |
| CN110652946B (en) * | 2019-09-24 | 2021-11-09 | 安徽神剑新材料股份有限公司 | Top temperature control system and method in polyester resin production process |
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| Publication number | Publication date |
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| CN102775589B (en) | 2014-06-25 |
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