CN101269801A - Nitrogen gas processing equipment for continuous solid phase polycondensation and using method thereof - Google Patents
Nitrogen gas processing equipment for continuous solid phase polycondensation and using method thereof Download PDFInfo
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- CN101269801A CN101269801A CNA2008100248213A CN200810024821A CN101269801A CN 101269801 A CN101269801 A CN 101269801A CN A2008100248213 A CNA2008100248213 A CN A2008100248213A CN 200810024821 A CN200810024821 A CN 200810024821A CN 101269801 A CN101269801 A CN 101269801A
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- nitrogen
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- molecular sieve
- filter
- dew point
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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
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Abstract
The invention relates to a nitrogen treatment device used for continuous solid-state polycondensation and a use method thereof. The nitrogen treatment device and the use method are characterized in that the nitrogen treatment device comprises three molecular sieve sorption cylinders, a group of mechanical combined type core shaft distributing valves, secondary high temperature filters, two dehumidification sorption blowers, a regeneration blower, a regeneration filter, a heat exchanger, a cooler, etc. The nitrogen treatment device dries and purifies nitrogen with a flow of refined nitrogen,regeneration filter,high temperature filter 1, high temperature filter 2, cooler dehumidification sorption blowers,molecular sieve sorption cylinders,drying dew point nitrogen-discharge into a solid-state polymerization device, and qualified nitrogen with high accuracy and low dew point is produced at last. The nitrogen treatment device and the use method thereof have the characteristics of low manufacturing cost, energy conservation and low dew point of produced nitrogen.
Description
Technical field
The present invention relates to a kind of nitrogen be carried out the molecular sieve dehydrating unit and the using method of drying, purifying treatment, this device is usually used in and the continuous solid phase polycondensation matched with devices, belongs to chemical machinery and makes the field.
Background technology
Solid state polymerization is the important method that manufacturing high viscosity, carboxy lower contain weight polyester.It is to be the polyester slice of 0.60-0.70 with limiting viscosity, under high vacuum or protection of inert gas, is heated to 200-240 ℃, thereby makes the limiting viscosity of section bring up to the process of 0.9-1.2.In the process of solid state polymerization, because the existence of oxygen can make polyester that oxicracking at high temperature takes place, thereby cause polyester inherent viscosity to reduce and polyester darkens, carboxyl-content increases, produce low molecular weight gas simultaneously, and there is gel to generate, these factors all are unfavorable for the spinning property of polyester and the performance of final fiber, and are especially powerful.Therefore, should avoid above-mentioned oxidising process in the solid state polymerization processes as far as possible.
Nitrogen is cut into slices as protection in the equipment of solid-state polycondensation and is avoided producing the inert media of reflection with extraneous oxygen or other material under solid state shape, and it requires as follows:
1, the flow general requirement is controlled at 350-750m
3/ h looks the flow of polyester slice and adjusts;
2, the oxygen level because of circulating nitrogen gas will cause polyester slice oxicracking at high temperature, thereby requires its oxygen level low more good more, generally is controlled at below the 100ppm;
3, the nitrogen dew point requires to below-65 ℃.
Present stage, generally adopt the runner water catcher that nitrogen is carried out drying treatment, processed nitrogen is the smart nitrogen of buying from system nitrogen factory, purity is 99.999%.Produce in this manner, following problem arranged:
1, the runner water catcher generally uses freezing mode that nitrogen is carried out processed, the nitrogen dew point height after the processing;
2, runner uses the life life-span short;
3, plant energy consumption height;
4, maintenance difficult;
5, running cost height (smart nitrogen price is also very expensive).
Summary of the invention
Handle the above-mentioned technical problem that nitrogen exists in order to solve above-mentioned runner water catcher, first purpose of the present invention provides a kind of molecular sieve water catcher with advantages such as high life, less energy-consumption, low operating costs.
Second purpose of the present invention is to provide the using method of this device.
In order to realize first above-mentioned purpose, the present invention has adopted following technical scheme: a kind ofly be used for the nitrogen gas processing equipment that equipment of solid-state polycondensation uses, comprise three molecular sieve adsorption tubes, one group of combined type mechanically mandrel distribution valve, secondary high-temperature filter, two dry absorption blower fan, regeneration blower fan, regeneration filter, heat exchanger and water coolers etc.
Described three molecular sieve adsorption tubes are in the absorption of drying, thermal regeneration, the dried different operating state of cooling guarantor respectively.
Described two one of absorption blower fans that dry are worked, and another is standby, can non-stop run to keep water catcher.
In order to realize second above-mentioned purpose, the present invention has adopted following technical scheme: the flow process by the low dew point nitrogen of the refining nitrogen → regeneration filter → high-temperature filter 1 → high-temperature filter 2 → water cooler → absorption blower fan that dries → molecular sieve adsorption tube → drying → enter solid state polymerization device is carried out drying, purifying treatment to nitrogen, obtains high precision at last, hangs down the passing nitrogen of dew point.
The regeneration flow process of described three molecular sieve adsorption tubes is: regeneration nitrogen → regeneration filter → regenerative heater heating → molecular sieve adsorption tube → heat exchanger → regeneration blower fan → enter atmosphere;
The loading level of described molecular sieve is set at 800-1200kg, can make the nitrogen dew point after the dehumidifying reach-60 ℃, can reach-80 ℃ and following when minimum.
The working order of described three molecular sieve adsorption tubes realizes switching by the long mandrel rotation hexagonal angle of one group of combined type mechanically distribution valve of electrical control.
The beneficial effect that the present invention reaches comprises:
1, can purify or purifying treatment to the lower nitrogen of purity, greatly reduce production cost;
2, need not use refrigerated water can carry out the drying treatment of nitrogen, can reduce running cost greatly, for producer increases economic efficiency;
3, the nitrogen dew point is minimum reaches-80 ℃ and following, for solid state polymerization processes strong guarantee is provided smoothly, also may cut down the consumption of energy simultaneously;
4, other defectives such as the maintenance cost height that uses rotary-type water catcher to have, runner life-span be short have been improved simultaneously.
Device of the present invention not only can be applied in the terylene equipment of solid-state polycondensation, and nitrogen is carried out drying, purifying treatment, can also be widely used in other fields such as chemical pharmaceutical, electronics, weaving, food, rubber, storage, military project.
Description of drawings
Fig. 1 is the structural representation of molecular sieve water catcher of the present invention.
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is made a detailed explanation.
A kind of molecular sieve water catcher as shown in Figure 1 comprises three molecular sieve adsorption tube 6-8, one group of combined type mechanically mandrel distribution valve F1-F9, secondary high-temperature filter 10-11, two dry absorption blower fan 3-4, regeneration blower fan, regeneration filter 1, heat exchanger 2 and water coolers 9 etc.
Nitrogen arrives secondary high-temperature filter 10-11 through valve F8 by pipe-line transportation, being sent to the absorption blower fan that dries by valve F1/F3 control again after supercooler 9 coolings after being purified dries, be sent to molecular sieve by valve F2/F4 control again, through obtaining low dew point, high-precision nitrogen after the purifying treatment of further drying, be sent to the appointed place then.
Through the nitrogen precision after the above-mentioned processing generally can reach 99.999%, dew point reaches-80 ℃, regulate flow that the flow of each valve on the tubing system can control nitrogen to the needs level, thereby meet of the requirement of solid state polymerization device well nitrogen.If supporting with special nitrogen-making device, better effects if, production cost is more easy to control.
Claims (7)
1, a kind of nitrogen gas processing equipment that is used for continuous solid phase polycondensation is characterized in that device comprises three molecular sieve adsorption tubes, one group of combined type mechanically mandrel distribution valve, secondary high-temperature filter, two dry absorption blower fan, regeneration blower fan, regeneration filter, heat exchanger and water coolers etc.
2, device according to claim 1 is characterized in that three molecular sieve adsorption tubes are in the absorption of drying, thermal regeneration, the dried different operating state of cooling guarantor respectively.
3, device according to claim 1, another is standby to it is characterized in that working two one of absorption blower fans that dry.
4, a kind of using method that is used for the nitrogen gas processing equipment of continuous solid phase polycondensation, it is characterized in that nitrogen being carried out drying, purifying treatment, make high precision at last, hang down the passing nitrogen of dew point by the flow process of the low dew point nitrogen of the refining nitrogen → regeneration filter → high-temperature filter 1 → high-temperature filter 2 → water cooler → absorption blower fan that dries → molecular sieve adsorption tube → drying → enter solid state polymerization device.
5, using method according to claim 4, the regeneration flow process that it is characterized in that three molecular sieve adsorption tubes is regeneration nitrogen → regeneration filter → regenerative heater heating → molecular sieve adsorption tube → heat exchanger → regeneration blower fan → enter atmosphere.
6, using method according to claim 4 is characterized in that the loading level of described molecular sieve is set at 800-1200kg.
7, using method according to claim 4 is characterized in that the working order of described three molecular sieve adsorption tubes realizes switching by the long mandrel rotation hexagonal angle of one group of combined type mechanically distribution valve of electrical control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100248213A CN101269801A (en) | 2008-05-07 | 2008-05-07 | Nitrogen gas processing equipment for continuous solid phase polycondensation and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100248213A CN101269801A (en) | 2008-05-07 | 2008-05-07 | Nitrogen gas processing equipment for continuous solid phase polycondensation and using method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN101269801A true CN101269801A (en) | 2008-09-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2008100248213A Pending CN101269801A (en) | 2008-05-07 | 2008-05-07 | Nitrogen gas processing equipment for continuous solid phase polycondensation and using method thereof |
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| CN (1) | CN101269801A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103058153A (en) * | 2012-12-19 | 2013-04-24 | 山东金宇轮胎有限公司 | Nitrogen preparation recycle system and control method thereof |
| CN111282306A (en) * | 2020-03-26 | 2020-06-16 | 苏州龙杰特种纤维股份有限公司 | Nitrogen gas purification system for solid phase polycondensation |
| CN115744838A (en) * | 2022-12-07 | 2023-03-07 | 杭州普菲科空分设备有限公司 | Low-power-consumption self-heating regeneration isobaric drying device |
-
2008
- 2008-05-07 CN CNA2008100248213A patent/CN101269801A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103058153A (en) * | 2012-12-19 | 2013-04-24 | 山东金宇轮胎有限公司 | Nitrogen preparation recycle system and control method thereof |
| CN103058153B (en) * | 2012-12-19 | 2014-09-10 | 山东金宇轮胎有限公司 | Nitrogen preparation recycle system and control method thereof |
| CN111282306A (en) * | 2020-03-26 | 2020-06-16 | 苏州龙杰特种纤维股份有限公司 | Nitrogen gas purification system for solid phase polycondensation |
| CN115744838A (en) * | 2022-12-07 | 2023-03-07 | 杭州普菲科空分设备有限公司 | Low-power-consumption self-heating regeneration isobaric drying device |
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Application publication date: 20080924 |