SU797747A1 - Method of dispersing gas phase in liquid - Google Patents

Description

through the membrane (a layer of inert material of a certain size). The efficiency and intensity of the dispersion process in this case is increased, and the degree of dispersion of the gas phase is determined by the optimal mode of the vibroput layer of inert material (membrane). The choice of the mode of vibration of the inert material, its size and height of the bulk layer, as well as the specific weight is determined by the process conditions (viscosity of the solution, its specific weight, etc.) and the requirement to ensure fluidization of the inert material,

.Prime p. Into cylindrical

a column with a diameter of 2.5 cm and a height of 15 cm, made of glass and divided into two areas by a metal grid with a hole size of 0.15 mm, is placed on top of a vibrating baffle, driven by a vibrator equipped with a direct current motor From O to 5000 rpm Quartz sand with a grain size of ø 35 mm with a bulk weight of 1.57 g / cm and a volume of 8 cm is loaded onto the metal gauze and water is poured under normal conditions in the amount of 150 ml. Outlet tubes are placed in both zones of the apparatus through the side holes, which are connected to a micromanometer for measuring pressure in the vibrochip adem and below the sand layer.

In the first Experiment, vibrational oscillations in the limit of frequency change from 0-75 Hz were applied to quartz sand and supplied air. In the second experiment, vibrational oscillations in the range from 0 to 81.6 Hz give only liquids in the absence of a layer of sand and also passes through the gas phase.

In the experiments, the change in pressure drop in the vibrocall

layer, the size of the bubbles of the gas phase in the liquid and the uniformity of their distribution in the apparatus. The fluid bed pressure was measured at a constant frequency at a predetermined limit for 0.5 h.

With an increase in the frequency of oscillations of sand particles from p to 75 Hz with a specific air flow rate of 0.25 l / min per 1 cm of inert material, gas phase bubbles are evenly distributed throughout the apparatus, and their size decreases from 5 to 0.5-0.6 mm The pressure in the lower zone of the column at the first stage becomes higher than atmospheric and decreases with an increase in the frequency of vibration, approaching normal conditions. When the air supply is stopped, the pressure in both zones is constant. With an increase in the oscillation frequency of the vibrating bilayer layer, the pressure in the upper zone decreases, and in the lower zone, the pressure drops (Table 1).

With an increase in the oscillation frequency of the liquid phase from O to 81.6 Hz, by passing aeroJuha only through the grid, the size of the gas bubbles decreases from 5 to 3 mm. At the same time, their distribution in the column volume is also observed. The pattern of pressure change in the lower part of the apparatus remains the same as in the previous experiment. When the air supply is cut off, the pressure in the upper unit of the apparatus decreases in a vapor-like relationship (Table 2). Thus, the imposition of vibrational oscillations on a layer of inert material changes the degree of gas dispersion in the liquid, eliminates the overgrowth of pores in the vibroplating membrane with simultaneous adjustment of their size, reduces the resistance as the gas passes through the membrane and increases its reliability. As a consequence, the effectiveness of the proposed increases; method and expands its scope in technological processes.

Difference

pressure,

DR mm

waters Art. about 0.06 0.12 0.14 0.13 0.12 0.14 0.16 0.22

Table 1

Difference

pressure,

dr mm

waters Art. about 0.01 0.03 0.06 0.07 0.09 0.16 0.19 0.22

Claims (2)

1. Authors certificate of the USSR 216636, cl. B 01, P 5/04, 1971. 2. Authors certificate of the USSR 214165, cl. In 01 T, 1966.