SU1282862A1 - Method and apparatus for degassing liquid - Google Patents

Abstract

The invention relates to processes for the degassing of liquids in cyclone apparatuses and makes it possible to increase the efficiency and speed of deep degassing of the entire mass of fluid passing through the cyclone. The fluid is fed into the cyclone in the form of jets touching each other and pairwise oppositely rotating around their axes, directed along a helical line along the wall of the cyclone. The fluid, before being fed into the cyclone, is oversaturated with respect to the pressure in it with a non-condensable gas. In the liquid inlet pipes, screw-type swirlers are installed with the opposite direction of twist on the adjacent pipes, which form pipes at the entrance to the cyclone are in contact with each other, and the number of pipes is even. The input connections are set tangentially and at an angle to the cross section of the cyclone selected from the ratio oC. arctg nd / D, where оС-- angle of the nozzles to the cross-section of the cyclone; p - the number of pipes; оС - diameter of nozzles at the entrance to the cyclone; D is the diameter of the cyclone. At the same time, screw grooves are made on the inner walls of the cyclone from the points of connection of the nozzles with screw swirls, the cross-sectional shape and angle of inclination of which correspond to the diameter and angle of the nozzles, protrusions are made at the bottom of the grooves for twisting the liquid jets. 2 sec. and 3 z. p. f-ly, 2 ill. (C (L

Description

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The invention relates to chemical technology and can be used in the degassing of liquids in the processes of separation, leodorization, neutralization, cleaning.

The purpose of the invention is to increase the speed and depth of degassing without increasing the dimensions of the cyclones.

The method is carried out as follows.

The liquid is fed into the cyclone tangential filtration to degass the liquid, for example kerosene, to the level Pj 0.1–0.01 kgf / cm (depending on the level of ejection) with a flow rate of 10–15 kg / s. If it is necessary to increase the productivity of degassing, a block is assembled from a certain number of proposed devices (modules). The flow of fluid into a cyclone in the form of tangency each other and pairwise oppositely rotating jets, right in the form of tangency each other and pairwise tilted along a helical line along the wall oppositely rotating around its cyclone, ensures the formation of jets along the helical line along the wall of the cyclone. In this case, the gas vortex is evacuated and the sheets of the shroud are composed of twisted jets (cords) with mutually reinforcing velocity fields (pair vortices).

cottage deaerated product. Fluid, 5 This effect allows one to realize the distribution of iodine to a cyclone oversaturate the area-related, organized perisol pressure in its non-periodic flow of matter (with a frequency of

FIG. 1 shows a scheme for implementing the rotation of the jets around its axis) in the position of the proposed method; in fig. 2 - the surface of the veil in the area of minimum capacity for its implementation. Static pressures. High speed

The device contains a cylindrical 20 transfer and its distribution over an area of 100 mm in diameter from tangential dike provides for deep degassing nozzles 2 of the liquid inlet the diameter of the entire mass of fluid and a high speed of 20 mm, the nozzle of the 3 output diameter of the mass transfer process degassing). 50 mm and a drainage pipe of 4 diameters. This is due to the fact that in the shroud, a litter of 50 mm connected to the vacuum pump 25 standing out of the harnesses, the viscous friction of the layers does not

it prevents the mass exchange surface from being renewed (the twisted bundle transfers the substance to the mass transfer surface not through the thickness of the stabilized boundary layer, but from a depth equal to the diameter of the bundle).

In addition, regular surface waves propagate on the surface of swirling jets, permanently deforming it, which increases the coefficient of turbulent

or an ejector 5, creating a vacuum to 0.1 to the HS / cm abs. In nozzles 2 sizes} 1 1-pin swirlers with opposite spin direction and gas-jet ultrasonic emitters 7 connected to pipeline 8 (DN 10) 30 supply supersaturated gas.

The nozzles 2 are located at an angle to the cross section of the cyclone 1, selected from the ratio oC arctg. Diffusion.

On the inner surface of the cyclone 1, the supersaturation of the liquid before being fed into

milled (or extruded roller 35 cyclone relative to the pressure in it without stamping) screw semicircular in a condensing gas causes volumetric cave 9 with a depth of 4 mm with swirling of liquid layers during their transfer lugs 10. At the bottom of the cycling surface whirl rotation jets. At the bottom of 1, there is a collector 11. Forming this, a large number of pu-nozzles 2 are formed at the entrance to the cyclone of contiguous-Q bubbles of small diameter, which are significant. Fla inlet and outlet pipes increases the surface of mass exchange, deforms the surface layer of liquid strands and contributes to an increase in the degassing rate.

Placing in the tangential nozzles of the input of screw swirlers with the opposite direction of twist of the adjacent nozzles, choosing the number of nozzles to be even and making them contact at the entrance to the cyclone allows the stabilization of the pair of vortexes and the liquid more reliably and simply to ensure the formation of sheets. a) open the valve, inlet at the cyclone inlet in pairs anti-14. The degree of degassing is controlled by way of oppositely rotating liquid jets.

Placing ultrasonic gas-jet emitters or other high-performance gas dispersers in pipes, compiled with R.%, 0 kgf / cm-, the ejection of 55 combined with the delivery system is not necessarily supersaturated. Turning on the yidachi of the Transy gas, which allows for the intensive thawing gas, is produced for the purification of the supersaturation of the liquid in the process of its trans-impermeable impurities. The device porting to the cyclone. The execution of the pipelines installed shut-off valves 12--14. Number of pipes 2 even. The shape of the cross section and the angle of inclination of the grooves 9 correspond to the shape of the cross section and the angle of inclination of the nozzles.

The device works as follows.

The valves 12 and 13 are opened and the degassed liquid is fed into the pipes 2. Mixing 1 and in the gas vortex with the help of ejection () 1) a. D, l concentration of dissolved gas corresponding to the partial

provides the degassing of a liquid, for example kerosene, to the level of Pj 0.1–0.01 kgf / cm (depending on the level of ejection) with a flow rate of 10–15 kg / s. If it is necessary to increase the productivity of degassing, a block is assembled from a certain number of proposed devices (modules). The flow of fluid into the cyclone in the form of jets of opposite to each other and pairwise oppositely rotating, directed along a helical line along the wall of the cyclone, provides for the formation of

Genial nozzles with an inclination to the cyclone cross section at an angle L - promotes the formation of contiguous surfaces from contiguous bundles with minimal deformation of the bundles cross section (forming the uppermost bundle, circumventing the cyclone surface in a circle, running exactly below forming the lowermost bundle).

When performing on the inner walls

directed along a helix along the wall of the cyclone.

2. A method according to claim 1, i-characterized in that the liquid, before being fed into the cyclone, is supersaturated with respect to the pressure in the gas vortex by a non-condensable gas.

3. A device for degassing a liquid containing a cyclone with tangential nozzles for introducing a liquid, a nozzle for discharging the degassed product and a drainage cyclone (from the connection points of the tangential nozzle connected to the vacuum nozzles) of the helical grooves, which are different in that the shape of the cross section and the angle of inclination of which with co-extrusion of efficiency, by increasing

correspond to the diameter and angle of inclination of the tan-velocity and the depth of degassing; it has the supply nozzles at the entrance to the cyclone, but with screw twists, also installed at the bottom of the grooves of the protrusions screwed into the nozzles of the fluid inlet

jet of liquid in the direction of twisting the swirlers in

initial twisting with the screws, increasing the stability of the pair of vortices and the intensity of the rotation of the jets over a long cyclone. The depth of the grooves, based on the optimal interaction of the 20 jets and their twisting by the projections, should be 0.2-0.4 of the diameter of the nozzles. The use of the invention makes it possible to significantly increase the mass transfer rate by ensuring deep cleaning of the entire s liquid mass, as well as the efficiency and productivity of degassing processes in chemical technology.

adjacent pipes are opposite, forming pipes at the cyclone inlet are in contact with each other, and the number of pipes is even.

4. The device according to claim 3, characterized in that the inlet nozzles are installed at an angle to the cyclone cross section selected from the ratio;

arctg f

where ° C - the angle of the nozzles to the cross section of the cyclone; p - the number of pipes; d - diameter pipes at the entrance to the cyclone; D is a cyclone diameter.

Invention Formula

5. The device according to claim 3, characterized in that screw screws are made on the inner walls of the cyclone from the points of connection of the nozzles with auger swirlers

1. A method for degassing a fluid, including a tangential flow of fluid into a cyclone, evacuating the gas vortex that is formed, and dispensing degassed

for the purpose of 35 grooves, the shape of the cross section and the angle of inclination of the speed and depth of degassing, which correspond to the shape of the cross section and the angle, the liquid is fed into the cyclone in the form of a tangent of the nozzles, and at the bottom of the grooves are friend and opposite opposing protrusions for twisting jets

but jets rotating around their axes, fluid.

directed along a helix along the wall of the cyclone.

2. A method according to claim 1, i-characterized in that the liquid, before being fed into the cyclone, is supersaturated with respect to the pressure in the gas vortex by a non-condensable gas.

3. A device for degassing a liquid containing a cyclone with tangential nozzles for introducing a liquid, a nozzle for dispensing a degassed product and a drainage nozzle connected to a vacuum s0

0

adjacent pipes are opposite, forming pipes at the cyclone inlet are in contact with each other, and the number of pipes is even.

4. The device according to claim 3, characterized in that the inlet nozzles are installed at an angle to the cyclone cross section selected from the ratio;

arctg f

where ° C - the angle of the nozzles to the cross section of the cyclone; p - the number of pipes; d - diameter pipes at the entrance to the cyclone; D is a cyclone diameter.

5. The device according to claim 3, characterized in that screw screws are made on the inner walls of the cyclone from the points of connection of the nozzles with auger swirlers

The 5 grooves, the cross-sectional shape and angle of inclination of which correspond to the cross-sectional shape and angle of the nozzles, and protrusions are made at the bottom of the grooves.

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Claims (5)

The claims 30 1. A method of degassing a liquid, comprising tangentially supplying a liquid to a cyclone, evacuating the resulting gas vortex and delivering a degassed product, characterized in that, in order to increase the speed and depth of degassing, the liquid is fed into the cyclone in the form of tangentially rotating and mutually opposing around their axis of the jets directed along a helix along the cyclone wall. 2. The method according to π. 1, characterized in that the liquid before being fed into the cyclone is supersaturated with respect to the pressure in the gas vortex by a non-condensable gas. 3. A device for degassing a liquid containing a cyclone with tangential nozzles for introducing a fluid, a nozzle for dispensing a degassed product and a drainage nozzle connected to a vacuum pump, characterized in that, in order to increase efficiency, by increasing the speed and depth of degassing, it is equipped with screw swirls installed in the fluid inlet nozzles, while the swirl direction of the swirls in adjacent nozzles is opposite, the generators of the nozzles at the inlet to the cyclone are in contact with each other, and the number of in the pipe even. 4. The device according to p. 3, characterized in that the input pipes are installed at an angle to the cross section of the cyclone, selected from the ratio: oC = arctg- ^, where a is the angle of inclination of the nozzles to the cyclone cross section; p is the number of nozzles; d is the diameter of the nozzles at the entrance to the cyclone; 0 is the diameter of the cyclone. 5. The device according to claim 3, characterized in that on the inner walls of the cyclone from the connection points of the nozzles with screw swirls, helical grooves are made, the cross-sectional shape and the angle of inclination of which correspond to the cross-sectional shape and the angle of inclination of the nozzles, and protrusions for twisting the jets are made at the bottom of the grooves liquids. FIG. 1 ¹² 82862