CN102775589B - Polyester process tower system - Google Patents
Polyester process tower system Download PDFInfo
- Publication number
- CN102775589B CN102775589B CN201210294394.7A CN201210294394A CN102775589B CN 102775589 B CN102775589 B CN 102775589B CN 201210294394 A CN201210294394 A CN 201210294394A CN 102775589 B CN102775589 B CN 102775589B
- Authority
- CN
- China
- Prior art keywords
- tower
- pipeline
- article
- temperature
- tray
- 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.)
- Active
Links
Images
Classifications
-
- 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 production of polyester field, particularly relate to the polyester process Tower System that a kind of tower top pressure is lower.
Background technology
Polyester process Tower System is equipment very important in production of polyester, its effect is that the mixture of ethylene glycol (EG) and water is separated, its separating effect will directly affect normally carrying out and the height of raw material consumption of esterification, the mixing steam of EG and water enters in tower, through heating medium for heating, EG is because boiling point is higher than water, and mixing steam is through the exchange of 20 layers of tower tray, at the bottom of EG concentrates on tower in a large number, water vapor concentrates on tower top in a large number.In existing polyester device, process tower is designed to 20 layers of valve tray column, overhead vapours lime set enters esterification water condensation tank by pipeline, technique overhead vapours is recycled, after general approximately 80% steam heat-exchanging for the running of other equipment of factory (as the kilocalorie refrigerator of general facilities portion), approximately 20% is used as plant area's life heat supply etc., and the liquid after heat exchange enters esterification water condensation tank, and process tower design pressure is 1.3KPa.
Technique overhead vapours is through after supplying with the heat exchange of other equipment of factory and life heat supply, lime set enters below the liquid level of esterification water condensation tank, because life heat demand amount is unstable, cause flowing back in the pipeline of esterification water condensation tank and may exist and not be condensed into liquid steam, and ducted steam can cause that pipeline is not smooth, cause the pressure of technique tower top to raise.
In sum, the main drawback that above-mentioned polyester process Tower System uses is aborning:
Process tower pressure on top surface is high, temperature is high, COD content is high in waste water, and process tower operating mode is unstable, does not reach energy-saving and cost-reducing best effect.After steam heat-exchanging, hot-water system temperature is unstable, causes general facilities refrigerator job insecurity.
Summary of the invention
The object of this invention is to provide a kind of tower top pressure lower, can meet overhead vapours recycling, and stable polyester process Tower System.
For achieving the above object, 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 described 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 Pall ring filler, and described tower body upper end is provided with vapour outlet.
Further, also comprise esterification water condensation tank, described esterification water condensation tank is by the Article 1 pipeline of arranging side by side, Article 2 pipeline is connected with vapour outlet with Article 3 pipeline, described Article 1 install pipeline has First Heat Exchanger, on described Article 2 pipeline, be provided with the second interchanger, on described Article 3 pipeline, be provided with air-cooler, between described air-cooler and vapour outlet, be provided with the first variable valve.
Further, on the Article 2 pipeline between described the second interchanger and esterification water condensation tank, be provided with blow-down pipe, described blow-down pipe is arranged on the exit of the second interchanger, and the top of blow-down pipe is higher than tower body top.
Further, described the first variable valve is pneumatic adjusting valve.
Further, be provided with mixing steam entrance and heating medium for heating pipeline on described tower body, described mixing steam entrance and heating medium for heating install pipeline are below tower tray.
Further, described tower tray bottom is provided with the first temperature-detecting device.
Further, described esterification water condensation tank bottom is provided with outlet conduit, described outlet conduit enters above the tower tray of tower body inside through pump and refrigerating unit successively, and between refrigerating unit and tower body top, be provided with the second variable valve, described the second variable valve is connected with the first temperature-detecting device.
Adopt technique scheme, beneficial effect of the present invention has:
(1) change 18-20 layer into Pall ring filler, Pall ring filler can increase heat interchanging area, is conducive to the cooling performance of water coolant, and filler adds float valve and is more conducive to EG and water separating effect.
(2) on the Article 2 pipeline between the second interchanger and esterification water condensation tank, be provided with blow-down pipe, and the top of blow-down pipe is higher than tower body top, both while having guaranteed normal production, can not overflow phlegma, again can be in the time that overhead vapours liquefy after recycling, discharge the not steam of liquefaction, avoid consequent process tower hypertonia.
(3) between air-cooler and vapour outlet, variable valve is set, obtains fluid temperature and come the switch of regulating and controlling valve by detecting steam recycling, both met the demand of steam recycling, by having guaranteed the stable of process tower.
(4) the polyester process Tower System of employing technique scheme, tower top pressure remains on 1.1KPa left and right, 1 ℃ of left and right of tower top steady decrease, sensitive tower tray temperature reduces by 20 ℃ of left and right, and process tower operating mode is stable.
Accompanying drawing explanation
Fig. 1 structural representation of the present invention;
Fig. 2 is one embodiment of the invention schematic diagram.
Wherein: 1 tower body, 2 tower trays, 21 valve trays, 22 Pall ring fillers, 3 vapour outlets, 4 esterification water condensation tanks, 51 Article 1 pipelines, 52 Article 2 pipelines, 53 three, ground pipelines, 61 First Heat Exchangers, 62 second interchanger, 7 air-coolers, 8 first variable valve, 9 blow-down pipes, 10 mixing steam entrances, 11 heating medium for heating pipelines, 13 first temperature-detecting devices, 14 outlet conduits, 16 refrigerating units, 17 second variable valve.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Fig. 1 is structural representation of the present invention, as shown in Figure 1, a kind of polyester process Tower System, comprise tower body 1, tower tray 2, totally two ten layers of described tower trays 2, calculate from bottom to up, 17 layers of tower tray of the first layer to the are valve tray 21, the 18 layer to the 20 layer is Pall ring filler 22, described tower body 1 upper end is provided with vapour outlet 3, also comprise esterification water condensation tank 4, described esterification water condensation tank 4 is by the Article 1 pipeline 51 of arranging side by side, Article 2 pipeline 52 is connected with vapour outlet 3 with Article 3 pipeline 53, described Article 1 pipeline 51 is provided with First Heat Exchanger 61, on described Article 2 pipeline 52, be provided with the second interchanger 62, on described Article 3 pipeline 53, be provided with air-cooler 7, between described air-cooler 7 and vapour outlet 3, be provided with the first variable valve 8, on Article 2 pipeline 52 between described the second interchanger 62 and esterification water condensation tank 4, be provided with blow-down pipe 9, described blow-down pipe 9 is arranged on the exit of the 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, the first proofing unit detects the temperature of counting from bottom to up layer 5 tower tray conventionally, control the second variable valve (as the dotted line of painting in Fig. 1) by the temperature variation of the first temperature-detecting device, the temperature detecting when the first proofing unit is during higher than preset temperature, the second variable valve is opened, esterification water in esterification water condensation tank flows out from the outlet at the bottom of tank, successively by pump and air-cooler, by cooling esterification water pump to tower body top, flow down by tower tray, the temperature at the first proofing unit place is reduced.Be connected with the second temperature-detecting device to the second interchanger place of other equipment heat supplies, control the switching (as the dotted line of painting in Fig. 1) of the first variable valve by the temperature variation at this place, when the temperature at the second temperature-detecting device place is too when preset value, the steam air output that this thing is described is large or temperature is higher, this thing is opened the first variable valve, steam enters esterification water condensation tank from Article 3 pipeline through air-cooler, accelerate the steam velocity of discharge of vapour outlet, thereby reduce the temperature and pressure of tower top.
Fig. 2 is one embodiment of the invention schematic diagram, as shown in Figure 2, tower body bottom arranges heating medium for heating device, at heating medium for heating, place is provided with temperature-detecting device, control temperature 178 ℃ of left and right, heating medium for heating device is provided with switch, in the time of excess Temperature, trip switch regulates temperature, heating medium for heating device top is provided with mixing steam import, the high temperature mixing steam of EG and water enters in tower body from here, through the heating of heating medium for heating device, 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, heat exchange efficiency is higher, make EG and water disconnected from each other, between valve tray, be provided with near temperature-detecting device (being arranged in the present embodiment the 5th valve tray) simultaneously, detected temperatures at any time, tower top set temperature proofing unit and pressure inspection car device.
Steam is after tower tray heat exchange, flow out from tower top, flow out along three pipelines respectively, Article 1, pipeline is used for providing hot water (more stable with heat in this pipeline) to plant area's medium power station lithium bromide refrigerating unit, be provided with temperature-detecting device to interchanger rear, Article 2 pipeline is used for providing hot water (living quarters thermally labile) to living quarters, Article 3 device for cleaning pipeline is crossed the cold device that goes of air and is directly connected with esterification water condensation tank, be used for discharging the rear also remaining steam of power station lithium bromide refrigerating unit and living quarters heat, on this pipeline, be provided with variable valve, Article 1, the temperature that the temperature-detecting device at pipeline interchanger rear detects is during higher than preset value (in the present embodiment, temperature preset value is 90 ℃), open variable valve or pass through the aperture of PID regulating and controlling valve, make unnecessary steam be expelled to esterification water condensation tank from the 3rd pipeline.
After steam supply power station lithium bromide refrigerating unit and living quarters heat supply, steam after heat exchange becomes liquid and flows into esterification water condensation tank, pipeline directly passes to below esterification water condensation jar liquid surface, due to living quarters thermally labile, in order to prevent that pipeline steam after heat exchange of supplying with living quarters from may not liquefy completely, lingering section steam in pipeline, cause circulating in pipeline not smooth, and then affect the pressure of technique tower top, cause process tower tower top pressure to raise, heat-exchanger rig rear at second pipe arranges blow-down pipe, the height of blow-down pipe is higher than tower body height, to prevent overflow, excess steam from here blow-down pipe is discharged.
Esterification water condensation pot bottom is provided with outlet conduit, on pipeline, be connected with pump, refrigerating unit and valve, in the time of the excess Temperature of the 5th tower tray detecting, open valve, phlegma flows out through pump and refrigerating unit from esterification water condensation tank, flow into (adopting shower nozzle to spray) tower body more from tower tray top, make tower tray temperature reduce (in the present embodiment, sensitive tower tray temperature is reduced to 108 ℃ by 128 ℃), guarantee that process tower operating mode is stable.Also be provided with esterification water spillway on the top of esterification water condensation tank, the pipeline in this exit is connected to heating agent station stripping tower, discharges unnecessary esterification water-cooled lime set.
Polyester process Tower System provided by the present invention, is transformed into float valve by valve tray column and adds Pall ring filler mixing column, and phlegma liquid-inlet pipe changes blow-down pipe into, simply transform by equipment, emphasis process parameter optimizing, stably manufactured, energy-saving and cost-reducing, process steam recycles continuously.After improvement, process tower pressure on top surface drops to 1.1KPA by 1.3KPA, tower top temperature drops to 100 ℃ by 100.9 ℃, and in waste water, EG content reduces 0.2%, and tower top waste water COD content drops to 2500 left and right by 2900, steam and hot water water temperature is constant, meet the normal smooth operation of two 2,500,000 kilocalorie refrigerators, waste water COD declines, the annual EG40-50 ton of approximately saving of tower top 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 embodiments of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, 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 claims.
Claims (5)
1. a polyester process Tower System, comprise tower body, tower tray, esterification water condensation tank, it is characterized in that: totally two ten layers of described tower trays, calculate from bottom to up, 17 layers of tower tray of the first layer to the are valve tray, the 18 layer to the 20 layer is Pall ring filler, and described tower body upper end is provided with vapour outlet;
Described esterification water condensation tank is by the Article 1 pipeline of arranging side by side, Article 2 pipeline is connected with vapour outlet with Article 3 pipeline, described Article 1 install pipeline has First Heat Exchanger, on described Article 2 pipeline, be provided with the second interchanger, on described Article 3 pipeline, be provided with air-cooler, between described air-cooler and vapour outlet, be provided with the first variable valve; On Article 2 pipeline between described the second interchanger and esterification water condensation tank, be provided with blow-down pipe, described blow-down pipe is arranged on the exit of the second interchanger, and the top of blow-down pipe is higher than tower body top.
2. polyester process Tower System according to claim 1, is characterized in that: described the first variable valve is pneumatic adjusting valve.
3. polyester process Tower System according to claim 1, is characterized in that: on described tower body, be provided with mixing steam entrance and heating medium for heating pipeline, described mixing steam entrance and heating medium for heating install pipeline are below tower tray.
4. polyester process Tower System according to claim 1, is characterized in that: described tower tray bottom is provided with the first temperature-detecting device.
5. polyester process Tower System according to claim 1, it is characterized in that: described esterification water condensation tank bottom is provided with outlet conduit, described outlet conduit enters above the tower tray of tower body inside through pump and refrigerating unit successively, and between refrigerating unit and tower body top, be provided with the second variable valve, described the second variable valve is connected with the 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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102775589A CN102775589A (en) | 2012-11-14 |
| CN102775589B true CN102775589B (en) | 2014-06-25 |
Family
ID=47120715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210294394.7A Active CN102775589B (en) | 2012-08-17 | 2012-08-17 | Polyester process tower system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102775589B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103342807B (en) * | 2013-07-10 | 2015-04-22 | 浙江万凯新材料有限公司 | Stable structure of polyester process tower |
| 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 |
Citations (2)
| 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 |
| CN202730048U (en) * | 2012-08-17 | 2013-02-13 | 江苏长乐纤维科技有限公司 | Polyester process tower system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007254642A (en) * | 2006-03-24 | 2007-10-04 | Toyobo Co Ltd | Continuous polyester production apparatus and its operation method |
-
2012
- 2012-08-17 CN CN201210294394.7A patent/CN102775589B/en active Active
Patent Citations (2)
| 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 |
| CN202730048U (en) * | 2012-08-17 | 2013-02-13 | 江苏长乐纤维科技有限公司 | Polyester process tower system |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2007-254642A 2007.10.04 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102775589A (en) | 2012-11-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201327309Y (en) | Open and close combined type multi-source double-effect energy tower | |
| CN101634499B (en) | Hot-water and heating-cooling room supply system | |
| CN204006906U (en) | Energy-conservation scale protective type chemical process enclosed cooling recirculation system | |
| CN103836862B (en) | A kind of cooling water temperature device and cool-down method | |
| CN104019580B (en) | A kind of low wind-warm syndrome operating mode mine return air source heat pump system and the method for operation thereof | |
| CN107178928A (en) | A kind of exhaust heat of slag flushing water extraction type cold/hot water machine of lithium bromide group | |
| CN102967074B (en) | Steam waste heat recycling device and control method thereof | |
| CN105222146A (en) | A kind of flue gas waste heat recovery apparatus | |
| CN202092479U (en) | Closed air cooling system for auxiliary machine circulating cooling water | |
| CN103411283B (en) | Water air-conditioning system coupling cooling spray device water circulation with air current cooler | |
| CN205065770U (en) | Flue gas waste heat recovery device | |
| CN102775589B (en) | Polyester process tower system | |
| CN202730048U (en) | Polyester process tower system | |
| CN206618289U (en) | A kind of cooling tower device with moisturizing and anti-scaling function | |
| CN102853485A (en) | Boiling type regenerative solution dehumidification system driven by solar energy and ground source energy | |
| CN202902501U (en) | Solar energy and earth energy combination driven boiling-type regenerative solution dehumidification system | |
| CN208059606U (en) | A kind of pressure-controlled steam exhaust recovering device | |
| CN205227917U (en) | Steam condensate water and waste heat recovery utilizes system thereof | |
| CN205227896U (en) | Condensate water is recovery system again | |
| CN204780279U (en) | Overflow dyeing machine waste heat recovery device | |
| CN203949348U (en) | Continous way electric water-boiling device | |
| CN204084539U (en) | A kind of open type heat source tower anti-icing fluid concentrates temperature elevation system | |
| CN209848339U (en) | Waste heat pump concentration equipment | |
| CN207394942U (en) | A kind of high temperature water station heating system | |
| CN207570360U (en) | Closed cooling tower with moisturizing circulation system |
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 |