PET双塔除湿干燥机：PET Twin Tower Desiccant Dryer

PET双塔除湿干燥机：PET Twin Tower Desiccant Dryer，双塔除湿机，PET干燥机

# PET Twin Tower Desiccant Dryer PET双塔分子筛除湿干燥机 完整双语介绍 ## English # PET Twin Tower Desiccant Dryer ### 1. Product Overview PET Twin Tower Desiccant Dryer is the core auxiliary equipment specially developed for hygroscopic PET virgin slices, recycled rPET flakes, PETG and PET preform injection/extrusion lines. It adopts dual-tower 3A molecular sieve alternating adsorption & regeneration technology, which can continuously output stable low dew-point dry hot air, fundamentally solve PET hydrolysis caused by moisture during high-temperature melting, and eliminate product defects such as bubbles, whitening, haze and brittleness. The whole system consists of twin adsorption towers filled with 3A molecular sieve, air filtration unit, circulating fan, regeneration heating system, PID PLC touch control system and matched insulated agitating drying hopper. It supports 24-hour non-stop continuous production for bottle preform, sheet extrusion, fiber spinning and 3D printing PET filament production lines. ### 2. Working Principle 1. **Adsorption Stage**: Ambient air passes through multi-stage filters to remove dust and oil mist, then enters the online adsorption tower. Water vapor is selectively trapped by 3A molecular sieve to form dry air with dew point -40℃~-50℃. After heating to 160–175℃, hot dry air evenly penetrates PET pellets in the drying hopper to take away bound moisture inside materials. 2. **Regeneration Stage**: After the molecular sieve in one tower reaches saturation, the PLC solenoid valve automatically switches air paths. The saturated tower is heated to 220–230℃ with reverse hot air to desorb and discharge water vapor outwards for regeneration. 3. **Alternating Cycle**: Two towers switch adsorption and regeneration every 8–12 minutes without shutdown, realizing uninterrupted supply of ultra-dry hot air all day long. 4. Closed-loop air duct design prevents dried PET materials from re-absorbing humid air during conveying and storage. ### 3. Core Configuration 1. Twin stainless steel adsorption towers, filled with food-grade 3A molecular sieve dedicated for plastic drying; 2. Multi-stage air filter (primary + medium-efficiency) to protect molecular sieve from oil and dust pollution; 3. Independent circulating fan & regeneration fan with low vibration and low noise; 4. PID constant temperature heating system, temperature control accuracy ±1℃; 5. Real-time dew point monitoring sensor, touch screen PLC with multi-group formula storage; 6. Matching double-layer thermal insulation agitating drying hopper to prevent PET softening and caking under high temperature. ### 4. Main Advantages 1. Stable ultra-low dew point (-40℃ ~ -50℃), not affected by rainy high-humidity workshop environment; 2. Continuous 24-hour operation without downtime, high production efficiency; 3. Deep dehydration to control PET moisture content below 50ppm, effectively avoid material hydrolysis and viscosity loss; 4. Stirred insulated hopper avoids PET agglomeration, suitable for both new slices and recycled rPET flakes; 5. Fully sealed closed air circuit, no secondary moisture regain of dried materials; 6. Easy maintenance, long service life of molecular sieve (1.5–3 years under clean working condition); 7. Can be divided into multiple independent drying loops to supply several injection molding/extrusion machines simultaneously, matching central feeding system layout. ### 5. Typical Application PET mineral water bottle preform, edible oil bottle preform, hot filling bottle, PET sheet, plastic fiber, recycled rPET modification, PETG transparent filament, 3D printing PET consumables extrusion production. --- ## 中文对照 PET双塔分子筛除湿干燥机 ### 1. 产品概述 PET双塔分子筛除湿干燥机是针对高吸湿性全新PET切片、回收rPET瓶片、PETG、PET瓶胚注塑/挤出产线开发的核心辅机。采用双塔3A分子筛交替吸附再生技术，可持续输出稳定低露点干燥热风，从根源解决PET高温熔融时水分引发的水解问题，消除成品气泡、发白、雾斑、脆裂等**缺陷。 整套设备由填充3A分子筛的双吸附塔、空气过滤单元、循环风机、再生加热系统、PID触摸屏PLC控制系统，以及配套保温搅拌干燥料斗组成，适配瓶胚、片材挤出、纺丝、3D打印PET耗材等生产线24小时不间断连续生产。 ### 2. 工作原理 1. **吸附工况**：车间环境空气经多级过滤器滤除粉尘、油雾，进入在线吸附塔，水分子被3A分子筛选择性截留，形成-40℃~-50℃干风；干风加热至160–175℃后，均匀穿过干燥料斗内PET物料，带走颗粒内部结合水。 2. **再生工况**：单塔分子筛吸附饱和后，PLC电磁阀自动切换气路；饱和塔通入反向高温热风（220–230℃），脱附水汽并向外排出，完成分子筛再生。 3. **双塔循环**：两座吸附塔每8–12分钟自动切换吸附、再生模式，无需停机，全天持续供给超低露点热风。 4. 整机闭环风道设计，杜绝烘干后的PET物料在输送、储料过程二次吸潮返湿。 ### 3. 核心结构配置 1. 双不锈钢吸附塔，填充塑胶干燥专用食品级3A分子筛； 2. 初效+中效多级空气过滤器，隔绝油污粉尘污染分子筛； 3. 独立循环风机、再生风机，低震动低噪音； 4. PID恒温加热系统，控温精度±1℃； 5. 露点实时监测传感器，触摸屏PLC可存储多组生产配方； 6. 配套双层保温搅拌干燥料斗，防止PET长时间高温软化结块。 ### 4. 核心优势 1. 露点稳定维持-40℃~-50℃，不受梅雨季高湿车间环境干扰； 2. 双塔交替不间断运行，支持全天24小时量产，生产效率高； 3. 深度脱水，可将PET含水率稳定控制在50ppm以内，避免原料水解、特性粘度下降； 4. 配套搅拌保温料桶，杜绝物料架桥结块，全新切片、回收rPET瓶片均可使用； 5. 全密闭循环风道，烘干原料无二次返潮； 6. 维护简单，洁净工况下分子筛正常使用寿命1.5–3年； 7. 可分多路独立干燥回路，同时给多台注塑/挤出机供料，适配车间中央集中供料布局。 ### 5. 适用场景 PET矿泉水瓶胚、食用油瓶胚、热灌装瓶、PET挤出片材、化纤纺丝、回收rPET改性、PETG透明线材、3D打印PET耗材挤出生产线。