Production method for recovering regenerated chemical filaments from industrial blankets

Abstract

The invention discloses a production method for recovering regenerated chemical filaments from industrial blankets. The production method comprises the following steps of firstly, classifying the waste blankets; secondly, smashing the waste blankets; thirdly, cleaning the surfaces of the blankets; fourthly, grinding the blankets into powder; fifthly, performing cleaning through hot water; sixthly, drying the powder blankets cleaned in the fifth step and storing the powder blankets in the dry environment; seventhly, performing high-temperature melting and filtering on the powder materials; eighthly, enabling melting to pass through a spinneret plate to form multiple columnar fibers; ninthly, performing high-temperature shaping on filament fibers which are stretched to meet the strength requirement so that the filament fibers can meet the requirement for straightness, and feeding the shaped filament fibers into winding equipment for winding and packaging into finished products so as to obtain the regenerated chemical filaments. The production method for recovering regenerated chemical filaments from industrial blankets is capable of recovering the waste industrial blankets in a more environment-friendly mode, wider in application range and better in use effect, reduces waste of resources and is more environmentally friendly.

Description

technical field [0001] The invention relates to the field of recycling and reuse of industrial waste blankets, in particular to a method for making recycled chemical fiber filaments from industrial blankets. Background technique [0002] Industrial waste blankets, such as blankets for paper production line, calcium silicate board production line, cement asbestos board production line, etc., play the role of dehydration, filtration and transmission on the production line. After 10-90 days of use, the felt will be off the machine and become industrial waste. At this stage, most domestic papermaking production line blankets are recycled into plastic granules, which are raw materials for the production of plastic products. The limitations of the existing recycling process limit its further processing into high value-added products. [0003] However, the waste blankets used in the calcium silicate board production line and the cement asbestos board (pipe) production line have not...

AI Technical Summary

Problems solved by technology

At this stage, most domestic papermaking production line blankets are recycled into plastic granules. Plastic granules are raw materials for the production of plastic products. The limitations of the existing recycling process limit its further deep processing into high value-added products.

[0003] The waste blankets used in the calcium silicate board production line and the cement asbestos board (pipe) production line have not been recycled and reused in China. The limitations of recycling technology at this stage have caused a large amount of industrial waste blankets to be wasted.

Papermaking blankets are currently recycled and granulated to the plastics industry. Every year, the national paper industry produces nearly 8,000 tons of waste felts. The recycling and granulation plants are all small factories. The waste gas produced by granulation will have a certain impact on the environment, and high-temperature degradation of polymers. Exhaust gas is difficult to deal with, and there are currently more than 700 production lines in China for calcium silicate board and cement asbestos board (pipe) production lines each year, and each production paper produces 3.5 tons of felt waste. It is difficult to recycle cement components, currently there is no recycling and regeneration, and it is used for packaging fillers / rural fences, etc., resulting in a great waste of resources