Material pipe jam preventing method in production of polypropylene block copolymer
A polypropylene block and copolymer technology, applied in the field of polyethylene-propylene block copolymer production technology, can solve problems such as blockage and expansion of the feeding system, and production cannot be carried out normally, and achieve stable control, stable ethylene content, The effect of product quality assurance
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Embodiment 1
[0016] Such as figure 1 As shown, on the line from No. 3 polymerization reactor powder conveying fan 7 outlet to No. 3 polymerization reactor powder feed tank 3, add low-purity nitrogen introduction pipeline 5 and surface deactivator Atmer163 injection pipeline 6, through the diaphragm pump. Inject Atmer163. Prepare low-purity nitrogen before changing production, and its oxygen concentration is 5600ppm. Add low-purity nitrogen and Atmer163 (produced in the UK) to the system 5 hours before ethylene injection, and the addition amount is 10Nm respectively 3 / hr, 12L / hr, so that the whole system is filled with low-purity nitrogen and Atmer163, and then cast ethylene to produce block copolymers such as J340, J440, J540, J640, J740, etc., and achieved good results. Pipeline blockage occurs, the output per hour reaches 12 tons, and the product quality is superior. The performance of J340 is shown in the table below. It can be seen from the table that the strength indicators of Yangz...
Embodiment 2
[0017] Embodiment 2: equipment transformation as embodiment 1
[0018] Prepare low-purity nitrogen before switching to block copolymer J340, and its oxygen concentration is 6000ppm. Add low-purity nitrogen and surface deactivator Atmer163 to the system 3 hours before ethylene injection, and the addition amount is 8Nm 3 / hr and 8L / hr, make the whole system full of low-purity nitrogen and Atmer163, and then put into ethylene to produce J340 ethylene-propylene block copolymer, and achieved good results, the whole production process is smooth without pipe blockage, and the output per hour reaches 11.5 Ton.
[0019] Test items
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