PET crystallization drying device

PET crystallization drying device，PET crystallization dryer，PET Crystallization Stirring and Drying System

### **PET Crystallization Drying Device: Technical Specification & Innovation**  

**—Advanced Solution for High-Performance Polyester Processing**  

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#### **Core Technology**  

1. **Dual-Stage Crystallization**  

  - **Pre-Crystallization**: Utilizes **fluidized-bed technology** (140–160°C) to initiate crystal nucleation, raising crystallinity from 5% (amorphous) to 25–30%.  

  - **Post-Crystallization**: Infrared-assisted heating (160–200°C) optimizes spherulite growth, achieving 35–50% crystallinity (±1.5% uniformity).  

2. **Ultra-Low Moisture Control**  

  - **Triple Desiccant Towers**: Molecular sieves (3A/4A/13X hybrid) maintain a dew point of **-50°C**, reducing moisture to **≤30 ppm** (ISO 15512 Standard).  

  - **Closed-Loop Monitoring**: Real-time NIR spectroscopy (1,550 nm wavelength) adjusts drying parameters dynamically.  

3. **Energy-Saving Design**  

  - Heat recovery efficiency ≥80% via plate heat exchangers.  

  - Power consumption: **0.15–0.22 kWh/kg** (30% lower than conventional rotary dryers).  

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#### **System Configuration**  

| Module | Key Components | Function |  

|--------|----------------|----------|  

| **Feeding** | Anti-bridging screw feeder | Preheats PET flakes to 50°C |  

| **Crystallization** | Multi-zone vibrating fluidized bed | Prevents agglomeration |  

| **Drying** | Adsorption towers + vacuum chamber | Achieves ≤30 ppm moisture |  

| **Control** | Siemens PLC + IoT-enabled HMI | Recipe management & remote diagnostics |  

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#### **Technical Parameters**  

| Parameter | Value |  

|-----------|-------|  

| Capacity | 0.5–12 tons/hour |  

| Temperature Range | 50–220°C (±1°C) |  

| Residual Oxygen | <300 ppm (optional nitrogen purge) |  

| Noise Level | ≤75 dB(A) |  

| Pellet Damage Rate | <0.1% |  

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#### **Innovative Features**  

- **Anti-Static System**: Ionized airflow reduces fines generation by 60%.  

- **Self-Cleaning Mechanism**: Automatic blowback for sieve plates (interval: 15–60 min).  

- **Hybrid Drying Modes**: Switchable between vacuum, desiccant, and microwave-assisted drying.  

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#### **Industrial Applications**  

1. **Bottle Preform Molding**: Ensures IV drop <0.02 dl/g during processing.  

2. **Film Production**: Reduces fish eyes to <5 pcs/m2.  

3. **Recycled PET (rPET)**: Processes post-consumer flakes with ≤0.3% moisture.  

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#### **Certifications & Compliance**  

- CE Mark (EN 60204-1 safety standard)  

- FDA 21 CFR §177.1630 (food-grade PET compliance)  

- ISO 9001/14001 certified production  

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**Operational Benefits**:  

- Increases production line speed by 25% through optimized crystallinity.  

- Reduces energy costs by $18/ton compared to traditional dryers.  

- Extends mold lifespan by 40% via consistent material flow.  

Deployed in 50+ global PET plants, this system guarantees ≤50 ppm moisture for 99.9% of batches, with ROI achievable within 12–18 months. (Word count: 298)