I want to do PET beverage bottle recycling processing What basic equipment is needed What level of waste processing can be easily out...

PET beverage bottle recycling methods are chemical recycling and physical recycling two kinds. Chemical recycling method is the PET waste bottles in certain reaction conditions depolymerization to generate useful chemicals, such as the production of low-grade fuel gasoline. Physical recycling method is the waste PET bottles after separation, crushing, washing and drying treatment for re-granulation method. Physical recycling method mainly has the following two kinds: one is to cut waste PET bottles into pieces, and separate HDPE, aluminum, paper and adhesive from PET, and the PET pieces are then washed, dried and pelletized; the second is to separate the non-PET caps, seat bottoms, labels and other magazines on the waste PET bottles mechanically, and then washed, crushed and pelletized.　　The former process: remove stones, wood and other plastic products as well as colored PET bottles by artificial methods first. Recycled PET must not contain PVC impurities, because its presence is a key factor affecting the color of PET. When the amount of PVC mixed into a small amount can be separated on the conveyor belt by manual methods, that is, by the torsion effect of PVC and PET bottles in the force part of the different physical phenomena, PVC bottles appear opaque traces of PET bottles do not, can be separated. Some companies also use PVC and PET different melting point will be broken PET and PVC fragments through the conveyor belt equipped with a heater to control a certain temperature, PVC is melted and adhered to the conveyor belt, so that can be separated from PET.　　Separation of iron using ferromagnetic separator.　　PET bottles are crushed either only once, or coarsely and then subdivided, and finally become 1.0-1.5cm size fragments. A sieve with an aperture of 1.0-1.5cm is installed at the outlet of the crusher to control the size of the fragments.　　Washing and impurity separation technology is the key to obtaining high quality recycled PET. Beverage bottles usually use plastic PE or finger labels, paper labels can be used with adhesives or can be glued on during the bottle blow molding process, when PET bottles are broken, some of the labels are broken into fragments, and some of them are still adhered to the PET fragments, the broken PET is usually separated by a combination of a blower and a cyclone separator separating device, which can remove about 98% of the loose label fragments, and it can also be separated by a separation device of a pumping tower, which can be used. Broken PET fragments are added vertically from the top of the separation tower, the fragments and the rising airflow to form a countercurrent, the use of PET and label fragments of the specific gravity of the difference between the label is pumped away, PET out of the bottom of the separator, in order to ensure the efficiency of the label separation, in the production of more than two sets of separating devices can be used.　　The purpose of washing is to remove adhesive, ash and residues in the original bottle. Washing using 80-100oC hot water to soften or dissolve the adhesive label and base of the EVA adhesive or other types of adhesive, in order to prevent the adhesive to prevent the adhesive from falling off and then adhere to the PET fragments, the need to add additives to the water, such as alkali, emulsifiers, or other special chemicals, cleaning solution is generally based on the source of the waste bottles by the factory and the adhesive characteristics of the composition of its formula to determine the content of the cleaning solution can be filtered out of impurities and reheated The cleaning solution can be filtered to remove impurities and reheated for recycling. Washing can be carried out in special cleaning tanks equipped with agitators, and in order to ensure the effectiveness of cleaning, the washing can adopt a two-stage washing process.　　Separation of the base is to utilize the different characteristics of the base HDPE density and PET density to separate them. Separation takes place in a rot washing tank, with the HDPE fragments overflowing from the top of the tank and the sinking PET fragments going out the bottom of the tank. In some cases, hydrocyclone separation is used instead of flotation tanks, which provides better separation.　　PET flakes are usually dried by centrifugal dewatering machine to reduce the water content of the flakes to 2%, and then dried by belt or tube dryer to reduce the water content to 0.5%.　　PET can not contain aluminum impurities, even if trace aluminum impurities will affect the transparency of recycled PET, so the aluminum content of recycled PET should be less than 50?10-6, the simplest way to separate aluminum is to manually remove the aluminum cap before crushing, aluminum ring or electrostatic separation method so that the aluminum content is reduced to 100?10-6, this separation can be carried out on a conveyor belt; if PET fragments are further purified through the metal detection separation system, the aluminum content can be lower than 100?10-6, and the aluminum content can be reduced to 0.5%. If the PET chips are further purified by metal detection and separation system, the aluminum content can be lower than 5?10-6. Recycled PET extrusion pelletizing and virgin PET extrusion pelletizing in addition to the difference in the feed material is not much difference in other aspects. Extrusion pelletizing can be used single-screw or twin-screw extruder, but in the design of the traditional extruder must be taken into account in the feed pressure is too large, change to feed part of the larger size of the screw, if the twin-screw extruder is more effective.　　The latter process: This recycling method is to separate the non-PET components in the PET bottles first and then crush them for recycling. It is the first manual method to separate the stones, wood and other plastic products and colored beverage bottles.The separation of PVC bottles can be carried out by manual selection method or PVC separation equipment. The separation of metal iron can be carried out by magnet separator. Beverage bottles pass through the conveyor and then enter the cleaning machine, the bottles enter the processing line vertically, the caps and rings are removed by the ring remover and cap remover, and weighed to make sure that the caps have been removed, and the test finds that the weight of a certain bottle exceeds the standard to separate it from the production line.　　Then each waste PET bottle is filled with 100ml of boiling water to dissolve the residual beverage inside the bottle, while the bottle is clamped and hung up, and the outside of the bottle is scrubbed with high-pressure water, and hot water is used to soften the bonding agent, so that the base falls off by itself, and the plastic or paper labels come off. After washing the bottom of the bottle is excised and the water inside the bottle is released. Crushing as in the first process method of equipment can be, after a continuous dryer to dry PET bottle fragments to moisture content of less than 0.05%. Extrusion pelletizing is the same as the bottom] one recycling method.　　Both of the above recycling technologies are used in factories. Their processes have their own characteristics. The first recycling method is easier to form a large-scale production, but the separation technology is more complex, more separation equipment, larger investment. The second method has higher product purity, less equipment and less investment, but it only applies to the intact beverage bottles without damage, and the flattened or damaged beverage bottles need to be separated out and recovered by other methods. In fact, waste plastic bottles should be flattened and bandaged before transportation from the consideration of economic rationality of transportation. Secondly, the base of the bottle cut out for recycling is basically in accordance with the first method, so the second recycling method has greater limitations.