SU1737053A1 - Glass fabric continuous treatment processing line - Google Patents

Abstract

Usage: in industry, in factories producing woven silica materials. SUMMARY OF THE INVENTION: A process line comprises a device for unwinding rolls of material, which is successively fed to a pre-wetting bath, then to a leaching bath. The last two baths have compensators for placing material on them. Between and after the leaching rollers, intermediate and final rinsing baths are installed. Behind the last leaching bath, an acid prewashing agent is installed, having a pair of corrugated plates with a gap for the passage of material, a nozzle for supplying water and squeezing pairs of shafts. The material then enters the drying chamber, the heat treatment means and the device for winding the material. 1 hp ff, 1 ill. 2 tab. with

Description

The invention relates to process lines for the production of glass fiber materials, preferably silica, and can be used in fiberglass factories and other enterprises.

A known processing line for producing silica woven materials contains a device for unwinding a material roll, successively positioned pre-wetting and leaching baths, intermediate between last washings of the material, acid pre-washing means

final washing, drying chamber and device for winding the roll.

A disadvantage of the known process line is the wiring of the material in the leaching baths, limiting the possibility of increasing productivity without a significant increase in size.

Constructive solution of nodes and technological methods for acid treatment limit the possibilities of intensification of mass transfer processes,

A water supply is provided in the washers, however, the material is immersed in the washing water, including the reaction products, which

Ix1

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about ate with

impairs the efficiency of the washing process.

The design features of the drying chamber do not provide effective drying parameters (low flow rate and direction).

The aim of the invention is to increase productivity, expand the technological capabilities of equipment, improve consumer properties of the material.

The drawing shows the technological scheme of the line.

The line contains a device for unwinding a coil, a pre-wetting bath 2, successively located 3t, 82 baths. Za leaching, compensators 4, squeezing pairs of shafts 5, an intermediate rinsing bath 6, a preliminary rinse means 7, a final rinse bath 8, a drying chamber 9 , a bath 10 for impregnating the binder with a system of shafts, rollers 11 for changing the direction of the material's wiring, heat treatment means 12, a device 13 for winding coils.

Technological line works as follows.

Silica woven materials are obtained by treating glass fiber materials with acid solutions.

The fabric from the unwinding device 1 rolls, successively through the system of drive rollers, passes through the prewetting bath 2 and the leaching bath 3i, moving into them in the form of vertical loops under tension, in the second 32, the third Z3 and subsequent leaching baths the material being processed without tension by transverse folds, is placed in the compensator 4 installed in the bath and having a V-shape.

Experimentally determined parameters of acid treatment, specific examples and technological indicators are given in table 1.

In the 3i, 2.3 leaching baths, at least one pair of squeezing rolls 5 are installed to partially remove acid solution and reaction products from the material, as well as to sample material from the bath. Such an arrangement of squeezing pairs of shafts contributes to the intensification of metabolic processes.

After the first 3i and second leaching baths, the material in the intermediate washing baths is washed off from the reaction products.

Pre-rinsing of the material after acid treatment is carried out.

using successive washing means 7, where, moving vertically from bottom to top between a pair of corrugated plates installed with a gap, against the flow of water coming from the nozzles installed above the plates, the material is washed from the acid and then wrung out using a pair of shafts 5, this at the bottom of the water is continuously diverted.

Such a constructive solution intensifies the washing process and increases its efficiency.

Final rinsing

5 is carried out in consecutive baths 8 with desalted water.

The material is dried in the chamber 9 with the forced supply of heated air through the nozzles to the material with partial recycling.

The drying mode is maintained by regulating dampers on the air ducts. The dried fabric enters the heat chamber for high temperature processing.

5Material in a heat chamber through the system

shaft enters the shaft, extends through the gap and moves vertically from top to bottom to the zone of maximum heating of the heat flux formed by two gas

0 burners.

The burners are located symmetrically treated fabric. The plane of the torch, formed by the flame, runs parallel to the plane of the processed material 5 ala. The walls of the heat chamber are made movable in a horizontal direction perpendicular to the plane of the glass fabric.

With this scheme, the wiring material in

0 a heat chamber burns oil out, dehydrates and shrinks the material irreversibly.

The combination of convective and infrared thermal effects of a wide range of process control allows

heat efficiently woven

weight of materials from

0.1 to 1.1 kg / m2 at temperatures up to 900 ° C.

Case Studies and Comparative

0 heat treatment characteristics are given in table. one.

In order to improve consumer properties and further processing, some types of woven materials (mesh KS-115 LA, etc.) are grown by the binder (thermoplastic resins, emulsions, etc.) in bath 10 and heat treated in a heat chamber.

The material from the drying chamber 9 enters the impregnation bath 10, where it is impregnated with a binder, drawn through the slit of the heat chamber from the bottom up, into the heat-affected zone. In a heat chamber, the binder is polymerized.

In tab. 2 shows specific examples and technological parameters of heat treatment.

From the table. 2 data shows that in order to achieve the required degree of polymerisation of the binder, during processing in a heat chamber with gas heating, it takes 30-40 seconds (with a convective 190-240 seconds). The reduction in heat treatment time and the acceleration of the fixation process, the binding is due to the intensifying effect of elevated temperature, fast heating of the material throughout its thickness, due to the penetrating power of infrared radiation at the initial heat treatment time, when the greatest amount of water is removed, followed by a decrease in temperature to 140-170 ° WITH.

Thus, the constructive implementation of the means for heat treatment, the layout of the units allows to expand the functional and technological capabilities of the line. After heat treatment, the material is wound into a roll in the device 13.

The arrangement of the technological line and the constructive solution of its elements allows to efficiently carry out the process of obtaining silica woven materials, increase equipment productivity by 1.5-1.6 times, intensify the processing process (see on Na20), expand the technological capabilities of the equipment, improve consumer properties of the material .

Claims (2)

1. Technological line for continuous processing of fiberglass woven materials, containing a device for unwinding a roll of material, successively arranged baths for pre-wetting and leaching intermediate between the last baths for intermediate washing of the material, the means of pre-washing the material from acid, successively located baths for final washing, drying chamber and coil winding device, characterized in that, in order to increase productivity, expand technological capabilities and improve consumer properties of the material, it has heat treatment means with guide rollers installed after the drying chamber to change the direction of material wiring, each bathtub leaching and the final bath for final washing have at least one pair of squeezing rolls, the second and subsequent leaching baths have compensators for accommodating the material being processed, and the acid pre-washing means for the material has at least one pair of corrugated plates installed with a clearance for material passage below upward and located above the plates of the nozzle for supplying water and squeezing pairs of shafts. 2. Lines according to claim 1, characterized in that between the drying chamber and a bath with a system of rolls for impregnating the binder of the material to be processed is installed by means of heat treatment. Specific examples and technological indicators of the technological line for the continuous processing of glass fabrics ) For the base of comparison, the C-22 process line was used in industry.  Control heat treatment was carried out on a drying line S-22 prototype. 11/1 6 iffifa fi ililll M 3j table 2