Processing device and method for polybutylene alloy powder

Abstract

The invention discloses a processing device and method for polybutylene alloy powder. The processing device comprises a filling device, a grinding and smashing device, a first-stage screening device,a second-stage screening device, a filtering device, a purification air storage tank and a fan, wherein the filling device comprises a hopper and a conveying screw rod; the grinding and crushing device is connected to the filling device through the conveying screw rod, and is provided with a main rotating disc with a plurality of collision columns and an auxiliary rotating disc with a grading cyclone fan; the main rotating disc and the auxiliary rotating disc are nested in a mode that the centers of the main rotating disc and the auxiliary rotating disc are overlapped; a feeding port of the first-stage screening device is connected to a discharging port of the grinding and crushing device, and a first rotary stirring valve is arranged at the bottom of the first-stage screening device; a feeding port of the second-stage screening device is connected to a discharging port of the first-stage screening device, and a second rotary stirring valve is arranged at the bottom of the second-stagescreening device; a feeding port of the filtering device is connected to a discharging port of the secondary screening device, a fine powder storage bin is arranged at the bottom of the filtering device, and an air draft inlet buffering bin with a back blowing device is arranged at the top of the filtering device; the purification air storage tank is connected to the back blowing device; and thefan is connected to the air draft inlet buffering bin. The polybutylene alloy powder processed by adopting the processing device has good granularity uniformity and the low fine powder content, so that the stability of the oxidation induction period is improved.

Description

technical field [0001] The invention relates to the technical field of polybutene alloy powder, and more specifically relates to a processing device and method for polybutene alloy powder. Background technique [0002] At present, my country's floor heating pipes are mainly produced using PEX, heat-resistant polyethylene (PE-RT), PPR, polybutene (PB) and other raw materials, among which polybutene is a high molecular inert polymer, which is the world's leading chemical material one. Polybutene alloy, also known as PB-A, is a high molecular polymer, mainly composed of the first monomer (1-butene), and the second monomer is produced by kettle position polymerization technology (batch polymerization process), and passed Add other additives and then extrude and granulate to obtain qualified pellet products; polybutene alloy powder is a kind of product produced by 1-butene and second monomer using still position series polymerization technology (batch polymerization process). Mo...

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Problems solved by technology

At present, the OIT of polybutene alloy products fluctuates greatly, and the main reasons are as follows: (1) the alloy particle size is uneven, the packing space density is uneven, and the antioxidant is unevenly dispersed in the packing gap; (2) the alloy products have Fine powder, the density of fine powder is low, it is easy to agglomerate, and it competes with other additives for space during the mixing process of additives, resulting in uneven dispersion of antioxidants during mixing

Regarding the way of adding plastic granulation aids, the current market technology mainly adopts the method of adding additives separately to prevent the agglomeration of additives. Adding, the amount of addition fluctuates greatly, and it needs to be added after dilution of the masterbatch, and the uneven particle size of the masterbatch and the amount of fine powder contained in it have a great impact on the mixing effect of the additives during the granulation process. Inhomogeneity will lead to uneven particle packing pore density, and the fine powder contained will compete with the fine powder of additives to form pores during the mixing process of additives, resulting in uneven mixing of additives in the masterbatch, which in turn will cause the oxidation induction period of additives Large fluctuations affect the quality stability of polybutene alloy products

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