Equipment for drying polyphenylene thioether
A technology of polyphenylene sulfide and drying equipment, which is applied in the direction of drying solid materials, drying gas arrangement, lighting and heating equipment, etc., which can solve the problems of low production efficiency, large fluctuations in water content, and inability to ensure stable spinning process, etc. Achieve the effect of ensuring the quality of finished products and avoiding oxidation
Active Publication Date: 2012-09-26
北京德厚朴化工技术股份有限公司
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Problems solved by technology
At present, there are only small batches of intermittent vacuum drying equipment for polyphenylene sulfide in China. The production efficiency is low, and the moisture content after drying fluctuates greatly, which cannot guarantee the stable spinning process.
Method used
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[0020] The technical solution adopted by the present invention to solve the technical problem is: using a continuous crystallization preheater to rapidly crystallize the polyphenylene sulfide slices and preheat them to the process temperature and send them into the dryer. In the dryer, the slices are dried by high temperature, low dew point and sulfide-free pure nitrogen, and the dried waste nitrogen is collected by the collection and treatment system and sent to the nitrogen purification system for purification and purification for recycling. In the nitrogen purification and purification system, the nitrogen must first be desulfurized, then deoxidized, then dehumidified, and finally processed into pure nitrogen through high-precision filtration and sent back to the system for reuse. The data processing and logical relationship of the system are all realized. Completed by PLC, the upper computer can monitor all system parameters and control the operation of all equipment.
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The invention relates to a drying treatment device used before deep processing of a polyphenylene thioether slice, in particular to continuous type polyphenylene thioether drying equipment for producing polyphenylene thioether fiber. The equipment comprises a crystallization fan and a drier; the lower part of the drier is provided with a polyphenylene thioether slice discharge port and a nitrogeninlet; the other end of the drier is connected with a crystallization preheater; the crystallization preheater is provided with a feeding rotary valve; the crystallization preheater, a heater, the crystallization fan and a cyclone separator form a fully-closed nitrogen circulating system, wherein the cyclone separator is connected with an inlet of the crystallization fan; an outlet of the crystallization fan is provided with the heater; moreover, the crystallization fan is also connected with a nitrogen purifying treatment unit through a valve; the nitrogen purifying treatment unit is connected with the nitrogen inlet on the lower part of the drier through a low dew point nitrogen dehumidification system; and the nitrogen purifying treatment unit and the low dew point nitrogen dehumidification system are connected with a control device. The equipment has the following advantages of a compact type crystallization and preheating system, a stable-temperature drying system, the fully-closed nitrogen circulating system, an original desulphurization reactor and a deoxidization reactor, the low dew point nitrogen dehumidification system and a complete DSC electrical control system.
Description
technical field [0001] The invention relates to a drying treatment device before deep processing of polyphenylene sulfide slices, in particular to a continuous polyphenylene sulfide drying equipment for producing polyphenylene sulfide fibers. Background technique [0002] Polyphenylene sulfide is a new type of material, which has the characteristics of high temperature resistance, corrosion resistance, creep resistance, high strength, heat resistance, etc. It can be used stably for a long time at high temperatures above 200C. Due to these outstanding characteristics of polyphenylene sulfide, it can be used in special occasions in high-tech fields, and can also be made into fibers to be used as high-quality filter materials in high-temperature environments, for example, it can be used for high-temperature flue gas purification. The manufacture of filter materials requires the use of spinning equipment to process polyphenylene sulfide into fibers, and the prerequisite for manu...
Claims
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IPC IPC(8): C08G75/02F26B3/06F26B21/00D01D1/00D01F6/76C08G75/0277
Inventor 张吉张瑞光
Owner 北京德厚朴化工技术股份有限公司