Technical data
The transformation is mainly aimed at the large-scale plastic extrusion granulation die plate heated by steam.
The advanced numerical simulation technology is used to analyze the flow field, temperature field and pressure field of the template heating medium.
According to this, the hot oil flow path, mold hole, heat insulation layer structure, granulation belt and new material selection of template matrix are optimized, and the new template is manufactured on the basis of not changing its original installation geometry size.
At the same time, a set of circulating system and control system suitable for granulation die plate heating with heat-transfer oil is designed to realize the integration of granulation die plate and heat-transfer oil circulating electric heating system and automatic control.
After heating with heat-transfer oil, not only the problems that affect the heating effect, opening rate and cutting quality of the formwork due to the low accuracy and large fluctuation of the steam heating temperature control can be solved, but also the stable control of the formwork heating temperature can be ensured, the opening rate of the formwork is high, the cutting effect is good, and the comprehensive thermal energy benefit can be improved.
The improved heating system adapts to the production of polyethylene products with a more extensive melt index (MFI = 0.2 ~ 50), and improves its comprehensive energy consumption efficiency to 30-50%.
| Name | Transformation of the former | After transformation |
|---|---|---|
| Product brand | LLDPE DFDA9085 | PP(T30S) |
| Granulator model | JSWCMP320 | ZSK-170 |
| Host motor rated power | 2800KW | 1500 KW |
| Template diameter | Φ846*100 | Φ846*100 |
| Number of die holes | 1360 | 1632 |
| Membrane hole diameter | Φ3.2mm | Φ3.2mm |
| Granulating belt sizeΦ | Φ510*Φ312 | Φ510*Φ312 |
| Heating medium | Steam | Heat conducting oil |
| Heat tracing in and out mode | Go up and down | Four in and out |
| Medium heating pressure | 4MPa | 0.5MPa |
| Medium heating temperature | 220~235℃ | 280℃ |
| Working temperature of formwork | 133~210℃ | 133~210℃ |
| Number of grain cutters | 12 | 12 |
| Opening rate of formwork | 80% | ≥99% |
| Particle uniformity | ≥98% | ≥98% |
| Clastic aggregate | ≤80 kg / day | ≤80 kg / day |
| LLDPE product melt index range | MFI 0.5~50 | MFI 0.5 below~50 |
| Comprehensive energy consumption (steam) | 1.2 T / h | Reduce 30-50% |
| Yield | 15 tons / hour | 18 tons / hour |