This PET Crystallization and Dehumidifying dryer system can serve PET sheet extrusion machine, PET strap production line, PET pelletizing machine, PET fiber production machine, PET bottle blowing machine. Also can serve PLA/PETG/PA/PC/PBT products making machines.
Crystallizer system structure and working principle:
1) The PET crystallizer system is mainly used for extruder machines or injection machine, and if the extruder machines and injection machines don’t have drying function themselves, they will need an independent dehumidifying drying system.
2) The crystallizer system will be used before dehumidifying drying system, because the PET flakes/virgin pellets cannot afford such higher temperature as 180℃ in drying hopper, they will stick with each other and block in drying hopper, so a pre-crystallizer system before drying system will be necessary, because it can solve the stick and block problem in drying hopper perfectly.
3) The crystallization system is an independent heating cycle. The high-pressure centrifugal fan is blown into the heating box and the crystallization tower, and then the air flow is discharged from the top of the crystallization. After passing through the cyclone separator and filter, it enters the fan to heat and stir the materials to achieve the purpose of crystallization.
4) The inner layer of the barrel is made of stainless steel mirror panel, the middle is insulation layer, and the outer barrel is covered with A3 plate and embossed aluminum plate.
5) The pre crystallization time is about 2 hours, and a reducer with an output shaft speed of about 3rpm is installed on the top. The mixing shaft is equipped with a special pressing blade like paddle, which can reduce the resistance of the slices during slow mixing and act as an upward “lifting” to effectively prevent the adhesion of crystal slices and reduce dust. It is different from the ordinary simple paddle of general manufacturers, which is also one of the characteristics of this equipment.
6) The electric heating box adopts electric heating pipe, and the crystallization tower is also equipped with over temperature alarm and power-off device.
7) During operation, the set temperature of hot air can only be preliminarily controlled within the range of 110-120 ℃, and the appropriate air inlet temperature is finally deduced from the air outlet temperature of 90-100 ℃ at the top of the pre crystallization. Because the air outlet temperature at the top is the key heating temperature for the non pre crystallized chips to be put into the container, the “glass transition” temperature of PET chips is about 69 ° C, but it is easy to produce bonding phenomenon when contacting with too high temperature, so it must be strictly controlled.
8) The dust carried out by the return air of the top cover of the pre crystallizer is separated and deducted by the cyclone separator, and the dust and fine particles fall into the collection bucket at the lower part. The barrel and the extension pipe at the bottom of the spin separator can be sealed by high-temperature pipe and hoop. When the dust reaches 80%, it should be poured out during shutdown.
9) The hot air after dust removal by the cyclone enters the crystallization tower through an air filter.
So it always keep the circulating hot air for the crystallization drier.
10) Clean the powder storage barrel for several days, and frequently open the filter inspection door to check whether the filter is blocked or damaged.
| PET crystallizer and dehumidification drying system (total crystalizing and dehumidifying drying period≥5H), dehumidification drying temperature is suggested 160℃～170℃. | |||||||||
| Model, drying capacity | Crystallizer stirring motor (KW/H) | Crystallizer air blower (KW/H) | Crystallizing heating power
(KW/H) |
Regenerating air blower motor(KW/H) | Regenerative heating power (KW/H) | Drying air blower(KW/H) | Drying heat(KW/H) | Feeder motor(KW/H) | Installed power(KW/H) |
| 300KG/H | 2.2 | 5.5 | 27 | 3 | 24 | 12.5 | 36 | 5.5 | 115.7 |
| 500KG/H | 4 | 11 | 36 | 5.5 | 36 | 18.5 | 54 | 5.5×3 | 181.5 |
| 1000KG/H | 5.5 | 15 | 45 | 4 | 24 | 18.5X2 | 63 | 7.5X3 | 216 |
The dehumidification drying system is designed to remove moisture from engineering plastic products in order to boost their quality and longevity. The equipment is highly efficient and does not slow down the production process at all, while greatly increasing the level of product toughness. It can also realize central dehumidification drying. Moreover, a set of dehumidification drying system can be used for plastic dehumidification drying of multiple extruders and injection molding machine.
Application:
The high efficiency dehumidifying drying system PET dryer is particularly suitable for the high efficiency dehumidification operation of recycled PET material. It is widely applied to injection molding, extrusion, plastic molding and processing and many other industries, which is indispensable drying dehumidifying equipment for the production of plastic products in their earlier stage. It is suitable for all plastic materials that need be dehumidified and dried, such as PET, TPU, PMMA, PLA, SGP, PS, and ABS.
Features:
1.80mm insulation layer observation door, observation is safe and conveniently.
2. Wrapped with 80mm aluminum silicate cotton greatly locks the heat and saves energy.
3. Anti-eccentric feeding device, uniform and smooth feeding without geting stuck.
4. Complete safety measures: the top of the tank is equipped with guardrail.
1. The air flow from the inlet will be refrigerated and compressed, to realize the first stage of dehumidifying effect.
2. Then use cellular silica gel wheel to achieve the second stage of dehumidifying effect.
3. Next, the dry air that reaches the request of dehumidification can enter into the heating cabinet for heating (the heating temperature can be set depending on the process requirements of the material).
4. Finally, it enters into a dynamic dryer, in a vortex type 360 degrees bottom-up uniform diffusion. Meanwhile, the drying hopper stirs at a low speed (to simulate the form of manual scrub), to make the material loose, allowing each grain of material can be heated uniformly, so as to complete dynamic drying.
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We are a professional plastic recycling machine manufacturer. We have different models even for same material type recycling machine, suggest to ask price/quotation based on real needs(e.g. capacity or your rough budget).
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