2020 టోకు ధర EPS ముడి పదార్థం రియాక్టర్ - ఇపిఎస్ రా మెటీరియల్ ప్రాజెక్ట్ - డాంగ్షెన్
2020 టోకు ధర EPS ముడి పదార్థం రియాక్టర్ - ఇపిఎస్ రా మెటీరియల్ ప్రాజెక్ట్ - డాంగ్షెండెటైల్:
EPS యొక్క సారాంశం(విస్తరించదగిన పాలీస్టైరిన్) ముడి పదార్థాల ఉత్పత్తి
ప్రాసెస్ ఫ్లో పరిచయం
The process of one-step method including polymerization, impregantion, cooling, washing, drying, sieving, coating, vibration examation, packing. The average production cycle time of the EPS production is 16~17 hours.
(1) పాలిమరైజేషన్ మరియు చొరబాటు
Polymerization and impregnation is proessed in the reactor. Under certain temperation, SM will polymerize. By comtinuous stiring, SM will be extended and cut into strips, then composing SM oil drops suspending in the water because of the surface pressure. There are dispersants suspending in the water to avoid SM particles bump and connect together. In this process the diserse power should be larger than the connect power to ensure the low-temperature polyerization.
The low-temperation polymerization reaction is running in the oil drop of SM, the heat released in the reaction will be taken away by the cooling water in the clip set. To remove the heat in time, we must ensure the normally work of recycling water system during reaction process. Otherwise, the temperature in the reactor will be too high, which lead to quick reaction and higher viscosity.
The beads production process is controlled manually, during the process, the temperature should be controlled proper to avoid large fluctuation, otherwise, the size range of beads will be widened. Meantime, frequently observation of samples is essential to control the size of beads.
తక్కువ బరువు కాకో 3 మరియు టిసిపి యొక్క సర్దుబాటు ద్వారా, పూసల పరిమాణాన్ని నియంత్రించవచ్చు.
DCS system is used for temperature control during the whole process of heating, polymerization, impregnation, high-temperature reaction, and cooling. To ensure safety production, the DCS system will control the reaction temperture and time, and alarm in over-temperature or overpressure case.
When the conversion rate of SM reach approximately 75%(about 4 to 5 hours under constant temperature), certain quantity of blowing agent should be added. After the impregnating and polymerization under certain time and pressure, we can get EPS beads.
The blowing agent for impregnation is injected into measuring kettle by pump, and accurately weighted by weighting device. After the high-tempterature process, when cooling to the specified temperature, the material can be discharged to washing tank.
(2) వాషింగ్
చెదరగొట్టడం మరియు డిఫ్లోక్యులేట్స్ వంటి మలినాలను కడగడం ద్వారా తొలగించాలి. శుభ్రపరిచిన తరువాత, చాలా ఉపరితల నీటిని తొలగించడానికి ఇపిఎస్ పూసలు సెంట్రిఫ్యూగల్ డీహైడ్రేషన్ ద్వారా ఎండబెట్టబడతాయి మరియు మరింత ఎండబెట్టడానికి సిద్ధంగా ఉంటాయి.
మలినాలను తొలగించడానికి మేము డి - ఫోమింగ్ ఏజెంట్ను కూడా ఉపయోగించవచ్చు.
(3) ఎండబెట్టడం
After centrifugal dehydration, there would be about 3% water residue on the surface of EPS beads(highly water content will influence the quality of EPS products), so further drying process is needed, during this process, EPS beads are dried by hot air. Blowing by hot wind, the surface resident water become steam, then this kind of gas-solid mixture come into the diffusion type cyclone separator, while the beads fall to filter silo through outlet, the high-speed revolving airflow will form a low pressure area in the center of the separator, and push the hot humid air flow up through the center pipe. In this way the beads will be dried.
After hot air drying , the beads need to be cooled by cold wind to further reduce the water content, and get ready for the screening. To prevent the accumulation of electricity, antistatic agent should be added during drying.
ఎండబెట్టడం ఉష్ణోగ్రత DCS వ్యవస్థచే నియంత్రించబడుతుంది.
(4) స్క్రీనింగ్
ఎండిన EPS పూసల పరిమాణాలు అసమానంగా ఉంటాయి, స్పెసిఫికేషన్ ద్వారా పూసలను వేరు చేయడానికి మరియు వేర్వేరు గోతులు బదిలీ చేయడానికి స్క్రీనింగ్ మాచింగ్ అవసరం.
(5) పూత
During the EPS production, storage, transportation and process, the escaping of blowing agent is inevitable. If too much blowing agent lost, many problems will occurred, such as decrease of expanding rate, increase of density, difficulty of forming, etc. To extend the valid storage period of EPS, and prevent the loss of blowing agent, the use of coating agent at the surface of EPS is essential.
(6) ప్యాకేజీ
వేర్వేరు స్పెసిఫికేషన్ ప్రకారం EPS పూసలను ప్యాకేజీ చేయండి. ప్రామాణిక ప్యాకేజీ బరువు 25 కిలోలు.
ప్యాకేజింగ్ యొక్క ఉద్దేశ్యం: కోనెనియెన్స్ రవాణా, బ్లోయింగ్ ఏజెంట్ తప్పించుకోవడాన్ని నివారించండి మరియు హామీ వ్యవధిని విస్తరించండి.
EPS ఫ్లో చార్ట్
కేసు
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