RU2628856C2 - Manufacture method of spun nanothin mineral fibre and equipment for its manufacture - Google Patents

Abstract

FIELD: nanotechnology.

SUBSTANCE: on the water-cooled combustion chamber, lined inside by refractory ceramics, set one nozzle unit in order to increase the pressure in it (respectively the energy source flow rate) to allow the primary mineral fibre blowing upto the nanoscale with the fixed relative to each other the upper and the lower parts (which eliminates burning out of the gaskets between the nozzle unit and the flange of the combustion chamber), with the roller drawing mechanism, having the adjustable rotation speed and with clamping strip, mounted with the ability to adjust its clamping height and fibre wire slot width for the primary mineral fibre accurate hit to the stoichiometric cone beginning, with step-by-step laying of primary mineral fibres through the step - 1.25mm on the manifold valve to increase the fibre productivity.

EFFECT: nanothin fibre production.

2 cl, 4 dwg

Description

Method for the production of staple nanofine mineral fiber and equipment for its manufacture.

The invention relates to the production of staple mineral fibers, in particular to the design of a nozzle apparatus with a roller exhaust mechanism and a pressure bar, and can be used in enterprises engaged in the production of staple mineral fibers. The present invention makes it possible to obtain nanofibers with subsequent implementation in the field of nanotechnology for the manufacture of paper-like composite filter materials for ultrafine cleaning of filtered media.

Closest to the proposed method is a method for producing microfine fibers from glass (AS USSR No. 528270 dated 03/27/74.) Using a combustion chamber to obtain staple micro- and ultrafine fibers from inorganic melts with two nozzle apparatuses, the upper parts of which are fixed rigidly, and the lower parts are able to move vertically.

This design cannot provide nanofine fibers, since at an increased pressure in the combustion chamber the shifting lower part of the nozzle apparatus does not provide a snug fit to the nozzle apparatus flange and, when the gasket burns out, hot gases burst around its lower part. Also, the design does not provide an accurate hit of the primary fiber at the beginning of the formation of a stoichiometric cone for the most efficient use of energy.

The purpose of the invention — the production of nanofine fibers (with a diameter of about 100 nm) —is achieved by the fact that one nozzle apparatus 19 is installed on the water-cooled combustion chamber 1 (Fig. 1, Fig. 2) lined inside with refractory ceramics 17 (Fig. 2) . 1) with cooling channels 18 (Fig. 2, Fig. 3, Fig. 4) and a pre-set gap of the nozzle 20 (Fig. 2) for the output of the energy flow 2 (Fig. 1, Fig. 3, Fig. 4), firmly fixing its upper 3 (Fig. 2, Fig. 3, Fig. 4) and lower 4 (Fig. 2, Fig. 3, Fig. 4) parts to the water-cooled flange for mounting the nozzle apparatus 14 (Fig. 1, Fig. 2), which makes it possible to increase the pressure in the combustion chamber without burning the gasket 5 (Fig. 2) and, as a result, the output velocity of the energy carrier stream 2 (Fig. 1, Fig. 3, Fig. 4).

In order to more accurately hit the primary fiber 1 (Fig. 1, Fig. 3, Fig. 4) at the beginning of the stoichiometric cone 9 (Fig. 3, Fig. 4), for maximum blowing, the pressure bar 7 (Fig. 2, Fig. . 3, Fig. 4) is installed with the possibility of adjusting it by the height of the clamp of the primary threads and adjusting the width of the slit of the fiber conductor 8 (Fig. 3, Fig. 4) before the energy flow 2 (Fig. 1, Fig. 3, Fig. 4).

To eliminate the bending of the primary fiber 1 (Fig. 1, Fig. 3, Fig. 4) at the entrance to the high-speed flow of energy carrier 2 (Fig. 1, Fig. 3, Fig. 4), while reducing the diameter of this fiber, the rotation speed is used rolls of the exhaust mechanism 6 (Fig. 1, Fig. 2, Fig. 3). A decrease in the revolutions of the rolls leads to a decrease in the feed rate of the primary fibers 1 (Fig. 1, Fig. 3, Fig. 4) and an increase in their diameter, and, consequently, the ability of the primary fibers to bend at the entrance to the energy carrier stream 2 (Fig. 1, Fig. 3, Fig. 4).

With the possibility of increasing the pressure in the combustion chamber 13 (Fig. 1, Fig. 2), this design of the nozzle apparatus 19 (Fig. 1) with a height-adjustable clamping bar 7 (Fig. 2, Fig. 3, Fig. 4), is adjustable the width of the slit of the fiber conductor 8 (Fig. 3, Fig. 4) and the frequency drive of the rolls of the exhaust mechanism 6 (Fig. 1, Fig. 2, Fig. 3) allows you to apply a dense layout of the primary fibers on the upper 12 (Fig. 1) and lower 11 (Fig. 1, Fig. 3) distribution combs (pitch - 1.25 mm) to increase the productivity of the process.

The production of mineral nanofibers is carried out in the following way.

A multi-fiber glass melting vessel 15 (Fig. 1) is loaded with balls or erklesis of an inorganic melt, where the melt, emerging through the spinnerets, is pulled by an exhaust roll mechanism 6 (Fig. 1, Fig. 2, Fig. 3) into the primary fiber 1 (Fig. 1, Fig. 3, Fig. 4). The primary fiber exiting the roll mechanism, pressed by the clamping strip 7 (Fig. 2, Fig. 3, Fig. 4) of the slit of the fiber conductor 8 (Fig. 3, Fig. 4), enters the stoichiometric cone 9 (Fig. 3, Fig. 4) a high-speed flow of energy carrier 2 (Fig. 1, Fig. 3, Fig. 4) emerging from the nozzle apparatus 19 (Fig. 1), consisting of the upper 3 (Fig. 2, Fig. 3 Fig. 4) and the lower 4 (Fig. 2 Fig. 3, Fig. 4) parts and in advance, when assembling the nozzle apparatus, set by a gap 20 (Fig. 2), where it is inflated and stretched in a high-speed flow of energy carrier 2 (Fig. 1). Further, staple nanofibers enter the fiber deposition chamber 16 (Fig. 1) and onto the receiving conveyor. Combustion products through a mesh conveyor are exhausted into the atmosphere.

Claims (2)

1. A method for the production of staple nanofine mineral fiber, characterized in that the primary fibers are fed strictly to the beginning of the stoichiometric cone of the energy carrier flow, while one nozzle apparatus is installed on the combustion chamber with a pre-set gap for the exit of the energy carrier flow in order to increase the pressure in it (respectively - energy carrier flow rate) and, thus, inflate the primary mineral fibers to a nanoscale with fixed upper and lower parts relative to each other (which it prevents burning of gaskets between the nozzle apparatus and the combustion chamber flange), while the speed of rotation of the rolls is adjusted to adjust (vary) the diameter of the primary threads, and a clamp bar is installed with the possibility of adjusting the width of the fiber duct and adjusting the height of the clamp of the primary threads, which allows an accurate hit them to the beginning of the stoichiometric cone, with stepwise laying of primary mineral fibers through a step of 1.25 mm on distribution combs (to increase the productivity of fiber). 2. Equipment for the production of staple nanofine mineral fibers, characterized in that one nozzle apparatus is installed on the combustion chamber to increase the pressure in it so that the primary mineral fibers can be inflated to a nanoscale with fixed upper and lower parts relative to each other, with a roll exhaust a mechanism with speed control and a clamping bar installed with the ability to adjust it according to the height of the clamp and the width of the slit of the fiber conductor for an accurate hit first GOVERNMENTAL mineral fibers in stoichiometric cone top, with stepwise laying of the primary mineral fiber through step - 1.25 mm distribution comb to increase the productivity of the fiber.

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