SU1060724A1 - Method of testing aqueous solution for washing cotton fabrics - Google Patents

Abstract

FILLING OF AQUEOUS SOLUTION FOR FLUSHING OF COTTON-MADE TISSUES by heating the aqueous solution and exposing it to a magnetic field, characterized in that, in order to increase the activity of the solution, the magnetic solution is applied to the aqueous solution before heating it, and the treatment of the solution with a magnetic field for 0.3-0.5 s, with a magnetic field strength of 800lOOa, or 3000-4000., or 17000-7300.3 with lacminar or transient movement of the solution. g

Description

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The invention relates to the finishing of cotton fabrics, and specifically to methods for treating an aqueous solution for washing cotton fabrics.

A method of treating an aqueous solution for washing textile materials with an impact on the solution by ultrasonic fields is known. Due to the strong alternating effect on the cleaning solution and on the material, a good technological effect is achieved.

However, the method is uneconomical, as it requires a large amount of electricity.

There is also known a method of treating an aqueous solution for washing cotton fabrics by heating the aqueous solution and exposing it to a magnetic field 2.

However, the magnetic treatment of the solution is carried out after heating, which greatly reduces the effectiveness of the washing.

The aim of the invention is to increase the activity of the solution.

This goal is achieved in that according to the method of treating an aqueous solution for washing cotton fabrics by heating the aqueous solution and exposing it to a magnetic field, the effect on the aqueous solution is magnetic. the field is carried out before heating it, while processing the solution with the magnetic field is carried out for 0.3-0.5 s, with a magnetic field strength of 800-gooo, 3800-4000 or 700.0-7300 e with laminar or transient movement of the solution .

I The fluid properties change after a short time in a magnetic field. The liquid penetrates the material faster than the process of washing the fabric is accelerated. Experiments on washing cotton fabrics from alkali were said that the lower the water temperature in the field (i.e., it is closer to 0 ° C), the better the washed fabric.

For each magnetic device there is an optimal speed of a wave in the field, i.e. this is the rate at which the greatest technological effect is achieved. The generalization of the experimental data showed that the best washing corresponds to the laminar regime in the vicinity of the transitional regime during the solution, i.e. Reynolds number is equal to critical. ..,

The number of Rg to where L is the characteristic size,

V - water movement speed

in prle,

D is the kinematic viscosity of a fluid.

The time of magnetic water treatment at the optimal Reynolds number is 0.3-0.5 s, i.e. the length of the magnet must be such that, with a given characteristic size and optimal velocity of the solution in the field, it will be in the field of the magnet not less than 0.3 and not more than 0.5 s. With a decrease in the residence time of the aqueous solution in the field below 0.3 s, washing the fabric from alkali deteriorates. An increase in time of more than 0.5 s does not improve the washing process.

. For a stationary magnetic field, the optimum field strength should be 850-1000 or 3800-4000, or 7000-7300 Oe, all other conditions being equal. A change in the tension of the floor in any direction from the specified numbers leads to a deterioration in the washing of tissues from alkali.

Laboratory experiments were conducted to verify the method of treating an aqueous solution for washing tissues. The fabric prepared for the MercaTion (twill Art. 3217 weighing 2.15 g is attached by a ring holder and immersed in caustic soda alkali solution (concentration 185 g / l) at 35 with a bath modulus 30. After that, the same sample of fabric is washed for 35 at bath module 30. The rinsing is carried out in water that has undergone magnetic treatment, and in water without treatment.

By the amount of alkali in the vbdnom solution, determined by titration, determine the intensification of the washing process by the formula

GM Gt

100%,

uG

where GU is the amount of alkali after washing in water magnetized under equal conditions;

fi amount of alkali after washing with drinking water (control sample). Experiments have shown that the proposed method of treating an aqueous solution for washing cotton fabrics allows the washing process to be carried out in less time, i.e. there is an intensification of the process. It is possible to reduce the consumption of water, steam, electricity, and other heat carriers, to reduce production areas occupied by flushing equipment, and to improve the ecology of the environment by reducing the discharge of polluted waters.

fe tab. 1 shows the relationship between the temperature of the water in the field and the washing of the fabric, in table. 2 shows the effect of the time of magnetic treatment of water on the intensity of the process of washing the tissues; 3 shows the effect of the intensity of the magnetic field, in Table. 4 The influence of the regime of fluid motion in a magnetic field on the washing of the fabric from alkali.

In tab. 1-4, the results of experiments on washing cotton fabrics from alkali appear, from which it follows that the parameters of the magnetic treatment of the solution cannot be arbitrary. But compliance with these parameters sev leads to the fact that the magnetic treatment does not intensify the washing process.

As the examples shown show, the proposed method of acting on the washing solution does not require, compared to the effect of the ultrasonic or low-frequency fields.

Water velocity in the field (V), m / s.

, 0.49 0.49 0.49 0.49 0.49 0.49 0.49 0.49 0.49 0.49

energy consumption (it is possible to use permanent magnets), does not require large and expensive and expensive equipment for its implementation, is safe to use, does not limit the speed of movement of the fabric when it is used. However, it is important to choose the parameters of the magnetic treatment of water (solution).

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The use of the proposed washing method allows to reduce the consumption of liquid and energy for washing materials, to reduce the production area of the area occupied by the equipment, and also to increase the productivity of the apparatuses.

Table 1

Water temperature in a magnetic field (T), ° С

10 30 29 43 55 54 62 62 70 76

table 2

Table

Claims (1)

METHOD FOR PROCESSING AQUEOUS SOLUTION FOR RINSING COTTON FABRIC by heating the aqueous solution and exposing it to a magnetic field, characterized in that, in order to increase the activity of the solution, the magnetic solution is exposed to the aqueous solution until it is heated, and the solution is treated with a magnetic field to for 0.3-0.5 s, with a magnetic field strength of 800-, 1000, or 3000-4000., or) 7000-7300. E with laminar or transient movement of the solution.