Steam heat shaping device for polyacrylonitrile base carbon fiber precursor

Abstract

The invention relates to a steam heat shaping device for a polyacrylonitrile base carbon fiber precursor. Two sets of steam atomizing assemblies connected with a steam pipeline are fixedly installed at the upper part of a heat shaping pipe. End covers are fixed on both sides of the heat shaping pipe. The centers of the end covers are provided with precursor feeding holes. Two inlet and outlet adjusting plates are respectively installed above and below the precursor feeding holes. One side surface of the heat shaping pipe is provided with two filtering seats, and a first filter screen and a second filter screen are laid in each filtering seat. The other side surface of the heat shaping pipe is provided with a water discharge pipe. Two connecting bases are respectively installed in the filtering bases. One end of each steam pipe is communicated with a steam nozzle, and the other end is communicated with a steam distribution pipe. Both ends of the steam pipeline are respectively communication with the steam distribution pipe and a steam generator. In the invention, fiber is effectively protected through the filter screens, the purity of the polyacrylonitrile precursor is increased, and broken filaments produced in the precursor production process are reduced. The sizes of an inlet and an outlet are effectively adjusted through the inlet and outlet adjusting plates so as to ensure pressure and temperature inside the cavity.

Description

technical field [0001] The invention relates to a steam setting device for long fiber chemical fibers, in particular to a steam heat setting device for polyacrylonitrile-based carbon fiber precursors. Background technique [0002] Because of its high specific strength, high specific modulus, heat resistance, corrosion resistance, fatigue resistance, creep resistance and other excellent properties, carbon fiber is widely used as a reinforcing material in aerospace, national defense construction and other fields. Among them, polyacrylonitrile Carbon-based fibers are the most widely used and have the highest output. The main raw material of high-performance polyacrylonitrile-based carbon fiber is polyacrylonitrile precursor, and the quality of the precursor largely determines the quality of the final carbon fiber. [0003] In the production process of raw silk, after hot water drawing, drying and densification and high-pressure steam drawing, there is a large thermal stress in...

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Problems solved by technology

[0005] In order to overcome the disadvantages of inconvenient wire drawing operation existing in the existing steam heat setting device, more fuzz, large temperature fluctuation, and potential safety hazards of burns during the heat setting process, the present invention proposes a polyacrylonitrile-based carbon fiber raw material. Silk steam heat setting device

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