BE904904A - Degassing vessel with vertical baffles spaced from floor - by distance decreasing in direction of flow and with sound generator upstream of all but last baffle - Google Patents

Abstract

A degassing vessel has a liq. inlet at one end and a liq. outlet at the other, gas outlet tubes, a series of vertical baffles spaced from the vessel floor by a distance which decreases with distance from the inlet, and a sound generator fixed to the floor of the vessel upstream of each baffle except the last.

Description

       

  "Apparatus for degassing liquid media"

APPARATUS FOR DEGASSING LIQUID MEDIA

  
The invention relates to equipment for separation in liquid and gas medium in different technological processes, and more particularly, apparatuses used for degassing liquid media.

  
The invention can be successfully used in the manufacture of cinematographic and photographic materials in the chemical industry dealing with photographic materials, in order to eliminate small and tiny bubbles of free and partially dissolved gases from photographic emulsions and magnetic varnishes with a high viscosity (greater than
300 cPo).

  
In addition to this, the invention can find application in the treatment of plastic masses and in the manufacture of synthetic fibers, glass and ceramic articles, porcelain, in the chemical industry,

  
petroleum refining: in petrochemicals, in papermaking in stationery, in clarification of wines in the food industry, in the manufacture of medicines and in reducing the aggressiveness of technological liquid media in the production of thermal energy.

  
It is known that the presence of gas in a liquid medium causes the formation in the produced parts of cavities, pores, pockets and other defects. In other cases, the gases present in the liquid medium cause corrosion.

  
There is an acoustic method and an apparatus for continuously degassing a flow of liquid medium (patent

  
  <EMI ID = 1.1>

  
n [deg.] 3284991, degassing of a liquid medium, for example, 50% aqueous solution of caustic soda, is done in a rectangular container provided with an inlet hole for the starting liquid medium arranged in the upper part of a side wall of the container, an outlet hole for the degassed liquid medium disposed in the lower part of a side wall adjacent to the bottom of the container and drainage pipes to evacuate the separated gases.

  
Inside the container is a row of vertical partitions installed one after the other so as not to touch the bottom, to let the current of the liquid medium pass from the inlet hole to the outlet hole along the bottom of the container.

  
The container houses an acoustic transducer connected to its bottom and used to excite acoustic waves in the current of the liquid medium, under the action of the latter in the liquid medium, gas bubbles are formed.

  
Because the vertical partitions are arranged

  
at the same distance from the bottom of the container, succeed each other from one side wall to the other and are in intimate contact with the latter, they form with the side walls of the container a series of zones filled with liquid medium which is in contact with the current of the liquid medium passing under the ends of the vertical partitions. Under the action of the acoustic waves excited by the acoustic transducer, the gas bubbles released from the liquid medium are directed into these areas. They are intercepted by vertical partitions, rising to the surface of the liquid medium where they burst.

  
  <EMI ID = 2.1>

  
ticks excited in the liquid medium by the acoustic transducer weakens in all directions as the distance from the center of the acoustic transducer towards the periphery, the process of

  
  <EMI ID = 3.1>

  
at the surface along the entire current of the liquid medium is not uniform. Therefore, in the areas formed by vertical partitions distant from the inlet, the gas bubbles do not have time to rise and, consequently, the vertical partitions being at the same distance from the bottom of the container. do not completely eliminate gases from the liquid medium.

  
The installation in the apparatus of an acoustic transducer connected to the bottom of the container, serving to excite in the latter acoustic waves and arranged under all the partitions leads to the following: in the liquid medium between the last partition with respect to the inlet and the wall of the container takes place the passage of the gas from the dissolved state to the free state and new gas bubbles are added to the gas bubbles contained in the liquid medium flowing from the outlet hole.

  
In addition to this, the arrangement of the acoustic transducer under all the partitions results in the fact that the acoustic oscillations act on the gas bubbles all the way from the liquid medium passing through the device. In this, these, in the liquid medium are formed areas arranged at the nodes and antinoids of the standing waves where the bubbles of gas are directed from the upper and lower layers and where they are retained by the acoustic oscillations.

  
the path of the current of the passing liquid medium. Only large gas bubbles can tear from these areas.

  
The arrangement between them of the vertical partitions, as described in the patent of the United States of America, at a distance multiple to the odd number of quarter waves of the acoustic vibrations in the liquid medium means that the zones where the bubbles accumulate gas is found at the butt ends of one or more vertical bulkheads

  
lower than their level, therefore, air bubbles avoid vertical partitions even if they are

  
  <EMI ID = 4.1>

  
The arrangement of the vertical partitions transverse to the direction of flow of the liquid medium causes the formation of swirls of the liquid medium near the ends, therefore the gas bubbles are also entrained from the upper layers of the liquid medium and pass under the ends vertical partitions.

  
Thus, the arrangement of the vertical partitions at the same distance from the bottom of the container and the installation in the device of a single acoustic converter under all the vertical partitions means that the device cannot be used to eliminate the gases from the medium. liquid whose viscosity exceeds 300 cPo because the rate of rise of the gas bubbles decreases rapidly, in principle, they cannot rise to the height where the vertical partitions are located and are driven by the viscosity forces of the medium current liquid to the outlet hole.

  
The invention aims to provide a degassing device

  
liquid media in which the arrangement of the vertical partitions and their interaction with an acoustic transducer would ensure a high quality of elimination of the gases from the current of a liquid medium of high viscosity.

  
The object is achieved by the fact that in a device for degassing flowing liquid media which comprises a container having an inlet port for a starting liquid medium, an outlet port for the degassed liquid medium and provided with drainage pipes for evacuate the gases from the device, a series of vertical partitions placed in the container one after the other and distant from the bottom in order to let the current of the liquid medium pass along the bottom from the inlet orifice to at the outlet orifice, an acoustic transducer connected to the bottom of the container and serving to excite in the container acoustic oscillations, according to the invention, each next vertical partition with respect to the inlet orifice,

  
is available at a lesser distance from the bottom than the previous one, at least one acoustic transducer being installed upstream of each partition, except the latter.

  
The installation of at least one acoustic transducer upstream of each vertical partition, except the last one with respect to the inlet orifice, means that an isolated gas bubble being initially at a minimum distance from the surface of the acoustic transducer, under the action of the acoustic oscillations excited in the liquid medium by the acoustic transducer, rises to a certain height.

  
If this isolated gas bubble rises above the acoustic transducer, first relative to the inlet, at an insufficient height and, consequently, is driven by the viscosity forces of the liquid medium

  
flowing in the space above the next acoustic transducer, it rises there to a height exceeding the previous one.

  
The arrangement of the vertical partitions so that each partition, next to the inlet, is at a lesser distance from the bottom of the container than the previous one, so that each isolated gas bubble rises, at the end, to a height necessarily greater than the distance between the respective partition and

  
the bottom.

  
In addition, in the liquid medium passing over each acoustic transducer, new gas bubbles are added to the existing ones, their size increases, their intense fusion, braking, stopping and the upward thrust of these gas bubbles where they are definitively intercepted by the vertical partitions, then rise to

  
the surface of the liquid medium and burst.

  
  <EMI ID = 5.1>

  
sections of the bottom of the container did not have time to reach a sufficient size to rise to a height where they could be intercepted by a vertical partition, and, consequently, were driven by the viscosity forces of the flowing liquid medium towards the space above the next acoustic transducer, these gas bubbles in this latter space will meet, under the action of the acoustic waves, with newly formed gas bubbles and will rise to the necessary height.

  
Like every next vertical partition with respect

  
at the inlet is located at a lesser distance from the bottom of the container than the previous one, the section through which the current of the liquid medium passes under the lower edges of the vertical partitions decreases with the descent of each partition, while the volume the liquid medium passing through these sections remains the same. Consequently, the speed of the liquid medium, its passage under the lower edge of each following vertical partition, increases. According to Eernoulli's law, with the increase in the flow speed of a liquid medium the pressure inside the flow decreases which contributes to the formation of new gas bubbles and

  
to their elimination from the liquid medium. As the acoustic transducer is installed upstream of each vertical partition, except the last one, the formation of new gas bubbles in the liquid medium in front of the last partition relative to the inlet orifice is completely excluded, the distance between the partitions vertical before-
-last and last with respect to the inlet orifice being such that the small gas bubbles formed by the acoustic transducer, last with respect to the inlet orifice, are completely intercepted by the vertical partition last with respect to the inlet.

  
It is useful to have in the device each vertical partition, next to the inlet,

  
  <EMI ID = 6.1>

  
0.1 of the distance from the previous partition to the bottom of the container.

  
The arrangement of each next vertical partition with respect to the inlet at a distance from the bottom of the container less than 0.05 of the distance from the partition. previous compared to the bottom leads to the installation of a large amount of vertical partitions and acoustic transducers which decreases the efficiency of the device. Besides this, the increase in the number of acoustic transducers increases the consumption of electrical energy.

  
The arrangement of each next vertical partition with respect to the inlet orifice, at a distance from the bottom of the container greater than 0.1 of the distance from the previous partition from the bottom results in the installation of a smaller number of vertical partitions and acoustic converters upstream of them which also leads to a reduction in the operating efficiency of the device.

  
  <EMI ID = 7.1>

  
of the liquid medium flowing near the lower edges of the vertical partitions, following with respect to the inlet, which causes the capture of gas bubbles from the upper layers of the liquid medium and their forced entrainment under the vertical partitions.

  
It is justifiable, from the technology point of view, to provide the vertical partitions of the apparatus with a device for adjusting their displacement in a vertical plane.

  
which makes it possible to operate the device at the optimal speed, that is to say that depending on the viscosity, the flow rate of the liquid medium through the device is varied by adjusting the value of the section of the flow of the medium liquid passing under the lower edges of the vertical partitions and, thereby, obtaining the desired quality of degassing of the liquid medium.

  
It is also justifiable, from a technology point of view, to connect the acoustic transducer installed upstream of each vertical partition, to the bottom of the container, by means of elements made of an acoustic absorbing material and to make the section of the bottom upstream. of the partition, last relative to the inlet orifice, also made of a sound absorbing material.

  
As a result of this fact, the acoustic oscillations from the acoustic transducers are transmitted to the current of the liquid medium in a more complete way along the vertical axis of symmetry of the vertical partitions because transmission to the bottom of the container is excluded. the direction of flow of the liquid medium of the acoustic oscillations which prevent the braking of the gas bubbles in this direction.

  
Because the acoustic transducers are connected to the bottom of the container by means of elements made of an acoustic absorbing material, any reciprocal influence of the transducers via the bottom of the container is excluded, hence the increase in the efficiency of each transducer acoustic. In addition to this, the production of the bottom section of the container upstream of the partition, the latter with respect to the inlet orifice, excludes the formation of new gas bubbles in the vicinity of the outlet orifice.

  
It is useful to give the vertical partitions a rectangular shape and to place them in a container of rectangular shape between its side walls, in

  
face of the inlet orifice, transverse to the direction of flow of the liquid medium, while, installed in

  
  <EMI ID = 8.1>

  
tick must be arranged so that its acoustic wave of maximum intensity is transmitted to the current of the liquid medium passing through the section coinciding with, the vertical axis of symmetry of the partition.

  
  <EMI ID = 9.1>

  
excited in the central part of the current of the liquid medium above the center of the acoustic transducer is maximum and exceeds the intensity of the acoustic oscillations excited above its periphery, the gas bubbles being in the central part of the medium current liquid move with greater speed and are subjected to the action of acoustic oscillations of maximum intensity. As the current of the liquid medium passes through the container of rectangular shape, it adopts the same shape. Taking into account the fact that the intensity of the acoustic oscillations excited in the liquid medium by an acoustic transducer is distributed essentially symmetrically from the center of the transducer towards its periphery, the acoustic oscillations are distributed uniformly in the rectangular section.

   This makes it possible to obtain the uniform degassing effect of the flowing liquid medium both along and through the direction of flow and, therefore, to achieve the guaranteed quality. The coincidence of the direction of the acoustic wave of maximum intensity of the acoustic transducer with the vertical axis of symmetry of the partition causes the acoustic oscillations to act on the current of the liquid medium perpendicular to the latter thanks to which the path

  
of displacement of the gas bubbles in the liquid medium deviates from the horizontal by an increased angle and, therefore, these gas bubbles rise more quickly on the surface of the liquid medium and burst.

  
It is also useful to provide the device for adjusting the displacement of the vertical partitions in the vertical plane with a tube disposed in the inlet orifice of the starting liquid medium, a float and a system.

  
levers, one lever of which supports the vertical partitions and is rigidly connected to the container lid and the other lever is articulated with the tube and the float, said levers being connected to each other by a third lever.

  
The presence in the device of a device for adjusting the displacement of the vertical partitions in the plane <EMI ID = 10.1>

  
liquid medium flows and removing bubbles therefrom

  
gas with guaranteed quality.

  
It is good from a technological point of view to provide the device with a block of microswitches installed on the

  
lever carrying the vertical partitions and electrically connected to the acoustic transducers, except the first with respect to the inlet orifice, via a switching device ensuring successive activation of the acoustic transducers.

  
When moving the lever carrying the blcc upwards

  
microswitches, an electrical signal supplied by the microswitch block makes it possible to start the device and to apply this signal to the switching device ensuring the successive starting of the acoustic transducers. It is then put into operation such a quantity of acoustic converters which is necessary to guarantee the quality of degassing of the liquid medium.

  
The number of vertical partitions on the bearing lever and

  
acoustic transducers upstream of the latter can be chosen such that the flow rate of the liquid medium through the device can be varied over a wide range. When the lever carrying the vertical partitions is moved downwards, the microswitch block will operate, via the switching device, by disconnecting the acoustic transducers. In this case, can be disconnected all

  
acoustic transducers, except the first with respect to the inlet. This excludes a step

  
  <EMI ID = 11.1>

  
the degassing quality of the lower current of the liquid medium.

  
It is desirable, from the technological point of view, to produce an apparatus which comprises several communicating receptacles; between them and arranged in series, each re-

  
  <EMI ID = 12.1>

  
has a height equal to:

  

  <EMI ID = 13.1>


  
  <EMI ID = 14.1>

  
  <EMI ID = 15.1>

  
R is the radius of a gas bubble '

  
  <EMI ID = 16.1>

  
gas bubble above the surface of the acoustic transducer;

  
is the length of the transducer surface

  
acoustic;

  
is the viscosity of the liquid medium;

  
  <EMI ID = 17.1>

  
Re is the Eeynolds number;

  
C is the speed of sound in the liquid medium;

  
  <EMI ID = 18.1>

  
0.7 is the safety factor which takes into account

  
fluctuations in the parameters of the sound field and the liquid medium,

  
and that under these conditions the vertical partition, last with respect to the inlet orifice for the liquid medium of each container, is produced with a rectangular orifice disposed at the bottom of the next container

  
in the direction of flow of the liquid medium.

  
Because each next container is placed higher than the previous container by a value h, the current of the liquid medium passing under the lower edges of the vertical partitions flows through the outlet opening made in the side wall of each container which allows to increase the efficiency of the device.

  
The realization in the vertical partitions of rectangular orifices arranged at the bottom of the next container in the direction of flow of the liquid medium makes it possible to separate the current from the liquid medium passing through each container at the height h, to separate the upper layers of the liquid medium that contain gas bubbles and send them to the next container for degassing. In this case, the distance h, from which the next container, in the direction of flow of the liquid medium, is higher than the previous container and over which in the vertical partitions are made rectangular holes, is determined by the height rise of the gas bubble initially located

  
  <EMI ID = 19.1>

  
acoustic transducer found using the equation of action of forces on the gas bubble in an acoustic field.

  
Thus, the flow of the degassed liquid medium passes under the lower edges of the vertical partitions and flows through the outlet orifice made in each container at a height less than h, which makes it possible to evacuate the gases with guaranteed quality and in same time to raise the efficiency of the device.

  
It is useful to install in the device, between neighboring containers, a detector for controlling the gas bubble content of the liquid medium electrically connected to the acoustic transducers of the container placed downstream of the detector through a switching device which ensures successive switching on of the acoustic transducers of each container in the direction of flow of the liquid medium.

  
The installation of the detector for controlling the gas bubble content of the liquid medium between the neighboring receptacles excludes the vacuum operation of the acoustic transducers of the receptacle placed downstream of the detector. If the liquid medium transferred to a container downstream of the detector contains a small quantity of gas bubbles, the detector sends a signal to the switching device which successively stops the acoustic transducers of each container in the direction of flow of the liquid medium and degassing in each next container in the direction of flow of the liquid medium continues only as a result of the fall of the vertical partitions.

  
It is technologically justified to provide the device with an auxiliary vertical partition installed in a cylindrical container and produced in the form of a spiral the center of which is coaxial with the center of the inlet orifice, forming a spiral channel of constant section in which, transversely to the direction of flow of the liquid medium, the rectangular vertical partitions are arranged, and under these conditions, coaxially with the inlet orifice, an acoustic transducer is installed, the acoustic wave of which at maximum intensity is cide with the axis of symmetry of the inlet, and in addition, the acoustic transducer installed upstream of each rectangular partition is arranged in such a way that its acoustic wave at maximum intensity is transmitted to the current of the liquid medium passing through the section

  
  <EMI ID = 20.1>

  
vertical.

  
Because the intensity of the acoustic oscillations excited in the central part of the current of the liquid medium passing through the inlet orifice above the center of the acoustic transducer is higher than that excited above its peripheral part, the bubbles gases in the central part of the flow having a higher velocity are subjected to the action of more intense acoustic oscillations. The coincidence of the maximum acoustic wave of the acoustic transducers with the axis of symmetry of the orifice entering the container means that the direction of action of the acoustic oscillations is opposite to the direction of movement of the liquid medium.

  
Consequently, we have a braking of the gas bubbles, their joining and elimination more effective than in the previous variants, and the elimination occurring from the area delimited by the first turn of the vertical partition carried out in the form a spiral connected to the bottom of the container.

  
The current of the liquid medium passing through the channel

  
in spiral formed by other turns of the auxiliary partition connected to the bottom and to the side wall of the container has a rectangular cross section. The installation in the spiral channel of vertical rectangular partitions transversely to the current of the liquid medium and of an acoustic transducer upstream of each partition whose acoustic wave at maximum intensity is transmitted to the current of the liquid medium passing through the section coinciding with the vertical axis of symmetry of the partition ensures a regular distribution of the acoustic oscillations in the rectangular section of the current. This makes it possible to obtain the effect of regular elimination of gas bubbles from the stream of the liquid medium.

  
across the direction of flow.

  
The installation of an auxiliary vertical partition forming a spiral channel forces the current of the liquid medium to flow in a spiral from the inlet orifice to the outlet orifice along the bottom of the container. In this case, the current of the liquid medium leaving the zone delimited by the spiral of the spiral channel, first relative to the entry and the first counting

  
from the inlet, rectangular partition, passes through all the zones formed by other turns of the auxiliary partition, through the side wall of the container and by the rectangular vertical partitions, above each installed acoustic transducer upstream of each rectangular vertical partition, except the latter, with respect to the inlet opening of the starting liquid medium.

  
Thus, by lengthening the flow path of the liquid medium in the apparatus, its stay is obtained

  
longer in the zone of action of the acoustic oscillations which makes it possible to raise the quality of elimination of gases from viscous liquid media (up to 300 cPo). Besides this, such a structure of the device makes it possible to reduce its bulk and to save the production areas.

  
It is also useful that the edges of the rectangular vertical partitions looking at the bottom of the container have a transverse profile produced in the direction of flow of the liquid medium along a curve essentially repeating the distribution curve of the intensity of the acoustic oscillations excited in the liquid medium by acoustic transducers installed upstream of each partition.

  
Such an executive of the edges of the vertical partitions makes it possible to pass over the part of the acoustic transducer exciting the most intense acoustic oscillations a larger volume of the liquid medium thereby increasing the efficiency of the device while guaranteeing the quality of elimination of gas bubbles.

  
It is possible to make the vertical cylindrical partitions and to install them across the direction of flow of the liquid medium in a container of cylindrical shape, coaxially to each other and to the inlet orifice, coaxially to which is installed an acoustic transducer whose acoustic wave at maximum intensity coincides with the axis of symmetry of the inlet orifice, and in addition, the acoustic transducer can be placed upstream of each cylindrical partition in such a way that its acoustic wave at maximum intensity is transmitted to the current of the liquid medium passing through the section coinciding with the vertical axis of symmetry of the bulkhead.

  
Since the intensity of the acoustic oscillations excited in the central part of the current of the liquid medium passing through the inlet orifice above the center of the acoustic transducer is maximum, the intensity of the acoustic oscillations excited above of its peripheral part is less and, the gas bubbles being in the central part of the current animated by a higher speed are subjected to the action of the more intense acoustic oscillations. The coincidence of the acoustic wave at maximum intensity produced by the acoustic transducer with the axis of symmetry of the inlet of the device makes the direction of action of the acoustic oscillations opposite to the direction of flow of the liquid medium.

  
Consequently, the braking of the gas bubbles, their joining and elimination from the zone delimited by the vertical partition, first relative to the inlet orifice, are more effective.

  
The vertical partitions being cylindrical and installed coaxially to each other and to the inlet port, the current of the liquid medium passes from the inlet port to the outlet port of the container along the bottom of the container flowing in all directions, then it passes along the circumference along the side wall of the container in the area delimited by the cylindrical partition, last with respect to the inlet, and the side wall of the container. In this case, the acoustic converter installed upstream of each vertical partition excites acoustic oscillations in an increasingly decreasing volume of the liquid medium delimited by 1st vertical partitions. It should be added that, since the length of the lower edge of each cylindrical partition, which is next to the inlet, increases, the value of the section

  
the flow of the liquid medium moving away from the inlet decreases further. ' notably that in the variants

  
  <EMI ID = 21.1> the lowering of the partitions, but also as a result

  
the increase in the area of the area delimited by each partition.

  
In addition, the arrangement of an acoustic transducer upstream of each vertical cylindrical partition in such a way that its acoustic wave at maximum intensity is transmitted to the current of the liquid medium along the vertical axis of symmetry of the partition in any which direction makes that the intensity of the acoustic oscillations excited in the current by the acoustic transducer is regularly distributed in all the cross section of the current of the liquid medium what makes it possible to reach the effect of the regular elimination of the bubbles of gas since the liquid medium and in addition, the acoustic oscillations act perpendicular to the direction of movement of the gas bubbles entrained by the flowing liquid medium by deflecting the path of the gas bubbles from an angle upward relative to the horizontal.

  
Thus, the structure of the device makes it possible to eliminate

  
  <EMI ID = 22.1>

  
reduced section and to obtain a high quality of elimination of gas bubbles from particularly viscous liquid media, for example, quartz glass.

  
It is useful to provide the device with a device for adjusting the displacement of the vertical partitions in a vertical plane which comprises a tube placed in the inlet orifice of the container for the liquid medium to be treated, a socket installed with the possibility of displacement. axial on the tubing and levers hinging at the end of the sleeve carrying vertical partitions mounted freely and connected in a movable manner to the container lid.

  
Due to the fact that the levers carrying the green bulkheads are mounted articulated at the end of the bushing which can move axially on the tubing and are movably connected to the container lid, the displacement of the bushing in the axial plane ensures the displacement of the partitions in vertical plane. Under these conditions, each cylindrical vertical partition, next to the inlet, has the possibility of

  
move a lesser distance than the previous one, while the difference in the heights of rise of the vertical partitions, first and last with respect to the inlet from the bottom of the container must ensure equality of the sections of the flow between the lower edges of the vertical partitions and the bottom of the container. Otherwise, the efficiency of each partition, next to the inlet, would decrease because as it moves away from the orifice, the liquid medium spreads out in a thinner layer and can pass lower without having touched the lower edges of the following vertical partitions.

  
The displacement of the vertical cylindrical partitions in a vertical plane making it possible to position them

  
of different heights with respect to the bottom of the container makes it possible to regulate the flow rate of the liquid medium through the apparatus while passing from the treatment of a liquid medium to the treatment of another having another viscosities and, therefore, to ensure a desired quality of disposal

  
gas bubbles from different liquid media.

  
The invention will emerge from the following description of an example of its execution shown diagrammatically in the accompanying drawings, in which: FIG. 1 represents an overall view of an apparatus for degassing flowing liquid media, according to the invention, section longitudinal; Figure 2 shows the section on line II-II of Figure 1; FIG. 3 represents the assembly A of FIG. 1
(on an enlarged scale); Figure 4 shows an alternative embodiment of the device provided with a displacement adjustment device. vertical partitions of rectangular profile, according to the invention, longitudinal section; Figure 5 shows a variant of the apparatus which comprises several rectangular containers, according to the invention, longitudinal section; 6 shows a partial view along arrow B of Figure 5;

   FIG. 7 represents the assembly C of FIG. 5
(on an enlarged scale); FIG. 8 represents a variant of the apparatus which comprises a vertical partition produced in the form of a spiral, according to the invention, longitudinal section; Figure 9 shows the section along line IX-
-IX in Figure 8; Figure 10 shows a variant of the apparatus in which the vertical partitions are cylindrical, according to the invention, longitudinal section; Figure 11 shows the section on line XI-XI in Figure 10; Figure 12 shows an alternative embodiment of the device provided with a device for adjusting the displacement of the vertical cylindrical partitions, according to the invention, longitudinal section.

  
The apparatus for degassing flowing liquid media according to the invention shown in Figures 1,2

  
and 3 comprises a container 1 with an inlet orifice 2 admitting a starting liquid medium 3 and an outlet orifice 4 through which the liquid medium 3 emptied of gas bubbles 5 exits.

  
The container is forced by side walls 6,7,

  
  <EMI ID = 23.1>

  
cover 11 carrying drainage pipes 12.

  
The inlet 2 for the starting liquid medium 3 is placed in the cover 11 in the vicinity of the side wall 6. The outlet orifice 4 for degassed liquid medium 3 is arranged in the lower part of the side wall 7 turning at the bottom 10 of the container 1.

  
The container 1 comprises between the side wall 8 and the side wall 9 a series of vertical partitions 13.

  
The vertical partitions 13 (fig. 1) form zones 14 filled with liquid medium 3.

  
The vertical partitions 13 are installed in the

  
container 1 with possibility of their displacement in

  
the vertical plane.

  
The lower edges 15 of the vertical partitions 13 are arranged at a certain distance L (fig. 3) relative to the bottom 10 to allow the liquid medium 3 to pass along the arrow .1 from the inlet orifice 2 to the orifice

  
  <EMI ID = 24.1>

  
According to the invention, each vertical partition 10 next to the inlet 2 is located relative to the bottom 10 of the container 1 at a distance

  
  <EMI ID = 25.1>

  
at the inlet 2, is made of a sound absorbing material.

  
Upstream of each vertical partition 13, except for the latter, an acoustic transducer 17 is installed connected to the bottom 10 of the container 1 via

  
of an element 18 (fig. 3) of a material which is not guided by sound, this transducer serving to excite acoustic oscillations in the zones 14 (fig. 1) to cause the gas bubbles 5 to rise towards the surface 19 liquid medium 3.

  
According to the invention, in the variant of the device, shown in Figures 1,2,3, the container 1 has a rectangular shape and between its side walls 8 and 9 (fig. 2), opposite the inlet 2 (fig. 1), the vertical partitions 13 of rectangular shape are arranged. An acoustic transducer 17 is arranged upstream of each vertical partition 13 so that its acoustic wave at maximum intensity is transmitted to the current of the liquid medium 3 passing through the section coinciding with the vertical axis of symmetry of the partition 13 in the direction of arrow B (fig. 3) from inlet 2

  
(fig. 1) to the outlet 4.

  
The variant of the device represented in FIG. 1 comprises a device for adjusting the displacement of the vertical partitions 13 in the vertical plane which comprises a tube 20 installed in the inlet orifice 2 for the entry of the starting liquid medium 3 into the container 1, and a system of levers 21, 22, 23. The lever 23 of this system carries the vertical partitions 13 and is rigidly connected to the cover 11 of the container 1, while the other lever 21 is mounted articulating on the tubing 20. The levers 21 and 23 are interconnected by the lever 22. In addition, the device comprises a float 24 hinging to the lever 21. The device shown in FIG. 4 is provided with a block of microswitches 25, installed

  
on the lever 23 carrying the vertical partitions 13, and

  
  <EMI ID = 26.1>

  
except the first one with respect to the inlet orifice 2, through a switching device 26 which ensures the successive activation of the acoustic transducers 17.

  
The apparatus shown in FIGS. 5, 6, 7 comprises two containers 1 in communication and placed in series one after the other, the second container 1 being installed higher than the first, at a height equal to:

  

  <EMI ID = 27.1>
 

  
or :

  
  <EMI ID = 28.1>

  
  <EMI ID = 29.1>

  
R is the radius of a gas bubble 5;

  
  <EMI ID = 30.1>

  
a gas bubble 5 relative to the surface of the acoustic transducer 17.

  
e is the length of the transducer surface

  
  <EMI ID = 31.1>

  
  <EMI ID = 32.1>

  
  <EMI ID = 33.1>

  
Re is the Reynolds number;

  
C is the speed of sound in the liquid medium 3;

  
e is the base of natural logarithm;

  
  <EMI ID = 34.1>

  
fluctuations in the parameters of the sound field and the liquid medium.

  
The vertical partition 13, last with respect to the orifice 2 of each container 1, is produced with a rectangular orifice 27 (fig. 6) disposed at the bottom 10 (fig. 5) of the next container 1 in the direction of flow of the liquid medium 3. The number of containers can be any, depending on the production

  
to obtain.

  
In addition, according to the invention, in the apparatus

  
  <EMI ID = 35.1>

  
neighbors there is installed a detector 28 to monitor

  
the gas bubble content 5 of the liquid medium 3 electrically connected to the acoustic transducers 17 of the container <1> (fig. 5) downstream of the detector 28 (fig. 7) through a switching device 29 (fig. 5) which ensures the activation of the acoustic transducers 17 of each container 1 successively in the direction of flow of the liquid medium 3.

  
The apparatus for degassing liquid media 3 in flow according to the invention shown in FIGS. 8,

  
9 comprises a container 30 of cylindrical shape provided with an inlet orifice 31 for the admission of a starting liquid medium 32 to be treated and an outlet orifice 33 for the liquid place 32 without gas bubbles 34. The container 30

  
cylindrical in shape is formed by a side wall 35 and a bottom 36 and is provided with a cover 37 in which

  
dispose of the drainage pipes 38.

  
The container 30 comprises an auxiliary vertical partition 39 produced in the form of a spiral, the center of which is coaxial with the center of the inlet orifice 31

  
and which forms with the bottom 36 and the side wall 35 of the container 30 a spiral channel of constant section. Entry port 31 for admitting the Liouid environment
32 of departure is arranged in the cover 37 coaxially

  
to the axis of symmetry of the container 30. The outlet
33 for the outlet of the liquid medium 32 without bubbles of

  
gas 34 has at the end of the spiral channel in the bottom 36 of the container 30.

  
The spiral channel shelters, one after the other and arranged transversely to the direction of flow of the liquid medium 32 (viscosity more than 300 cPo), vertical partitions 40 of rectangular shape.

  
The first turn, starting from the inlet orifice 31, of the vertical partition 39 connected to the bottom 36 of the container 30 forms a zone 41 (fig. 9) filled with the liquid medium 32 (fig. 8). The turns of the vertical partition 39 following from the inlet orifice 31 the vertical partitions 40 and the side wall 36 form zones 42
(fig. 9) filled with liquid medium 32.

  
The lower edges 43 (FIG. 8) of the vertical partitions 40 are arranged with respect to the bottom 36 at a certain distance to let the current of the liquid medium pass from the inlet orifice 31 to the orifice of outlet 33 along the bottom 36 of the container 30.

  
In accordance with the invention, each vertical partition
40, next to the inlet orifice 31, is located, relative to the bottom 36 of the container 30, at a distance less than the previous one, in other words

  
  <EMI ID = 36.1>

  
A section 44 of the bottom 36 of the container 30 upstream of the vertical partition 40, last relative to the inlet orifice 31, is made of an acoustic absorbing material.

  
In the container 30, coaxially with the orifice 31, an acoustic transducer 45 is installed which excites acoustic waves in the zone 41 (fig. 9) to cause the gas bubbles 34 (fig. 8) to rise.

  
surface 46 of the liquid medium 32. In this case, the acoustic wave at maximum intensity produced by the acoustic zransducer 45 coincides with the axis of symmetry of the inlet orifice 31.

  
  <EMI ID = 37.1>

  
its vertical line 40, except the last one, are installed acoustic transducers 47 whose acoustic wave at maximum intensity is transmitted to the current of the liquid medium 32 (fig. 8) passing through the channel formed of a section coinciding with the vertical axis of symmetry of the vertical partition 40 (along arrow C) (fig. 9) from the inlet port 31 (fig. 8) to the outlet port 33.

  
The acoustic transducers 45 and 47 are connected to the bottom 36 of the container 30 through elements 48 made of an acoustic absorbing material.

  
In the devices shown in Figures 1 to

  
  <EMI ID = 38.1>

  
rieur 43 (fig. 8, 9) of each vertical partition, respectively 13 and 40, of rectangular shape looking at the bottom 10 and 36 of the container 1 and 30 has a profile produced according to a curve transverse to the current of the liquid medium 3 and 32, this curved profile essentially repeating the distribution curve of the intensity of the acoustic waves excited in the liquid medium 3 and 32 by the acoustic converters 17 and 45 installed upstream of each partition 13 and 40.

  
The apparatus according to the invention shown in the figures

  
  <EMI ID = 39.1>

  
cylindrical formed by a side wall 50 and a bottom 51 and provided with an inlet orifice 52 for the admission of a starting liquid medium 53 and an outlet orifice 54 for the liquid medium 53 without gas bubbles 55.

  
The container 49 has a cover 56 on which

  
have the drainage pipes 57 and the inlet orifice 52 for the admission of the starting liquid medium 53 produced coaxially with the axis of symmetry of the container 49. The outlet orifice 54 (fig. 11) is produced in the form of a slot arranged in the lower part of the side wall 50 (FIG. 10) adjacent to the bottom 51 of the container 49.

  
In the container 49, transversely to the flow of the liquid medium 53, are installed, coaxially one

  
to the other and coaxially to the inlet orifice 52, vertical partitions 58 of cylindrical shape. The vertical partition 58 of cylindrical shape, first relative to

  
at the inlet orifice 52, forms a zone 59 filled with liquid medium 53. The vertical partitions 58 of cylindrical shape, following with respect to the inlet orifice 52, form between them and the side wall 50 of the container 49 zones 60 filled with liquid medium 53. The area of zones 59 and 60 is determined by the length of the lower edge 61 of the vertical partition 58.

  
The vertical partitions 58 are installed in the container 49 with the possibility of displacement in the vertical plane al.

  
The lower edges 61 of the vertical partitions 58 are arranged, relative to the bottom 51, at a certain distance to allow the current of the liquid medium to pass
53 from the inlet 52 to the outlet 54 along the bottom 51 of the container 49.

  
In accordance with the invention, each vertical partition
58, next to the inlet 52 is arranged relative to the bottom 51 of the container 49 at a lesser distance than the previous partition, in other words

  
  <EMI ID = 40.1>

  
A section 62 of the bottom 51 of the container 49 upstream of the vertical partition 58, last relative to the inlet orifice 52, is made of an acoustic absorbing material.

  
Coaxial with the inlet orifice 52, an acoustic transducer 63 is installed, the acoustic wave of maximum intensity of which coincides with the axis of symmetry of the inlet orifice 52, this transducer being used to raise the gas bubbles 55 towards the surface 64 of the liquid medium 53 in the zone 59.

  
Upstream of each vertical partition 58, except for the latter, an acoustic converter 65 (fig. 11) is installed, the acoustic wave of maximum intensity of which is transmitted to the current of the liquid medium 53
(fig. 10) along the vertical axis of symmetry of the partition 58.

  
The acoustic transducers 63 and 65 are connected to the bottom 51 of the container 49 by means of elements
66 in a sound absorbing material.

  
The apparatus shown in FIG. 12 comprises a device for adjusting the displacement of the vertical partitions 58 in the vertical plane, this device comprising a tube 67 placed in the inlet port 52 for admitting the starting liquid medium 53 into the recipient
49, a socket 68 mounted with the possibility of axial displacement on the tubing 67 and levers 69 mounted articulated at the end of the socket 68 and carrying the vertical partitions 58 freely mounted and connected

  
In a movable manner to the cover 56 of the container 49.

  
One end of the socket 68 by a stop washer 70 is introduced into the cover 56 of the container

  
49. We screw an adjusting nut 71 and a lock nut

  
72. On the cover 56 of the container 49 there is a ladder 73 with an indicator 74 rigidly connected to the socket
68.

  
The vertical partitions 58 are mounted movable by means of rods 75 in grooves 76 of levers 69 by means of pins 77.

  
The arms of the levers 69 are movably connected to the cover 56 of the container 49 by means of a support 78.

  
  <EMI ID = 41.1>

  
port at the inlet orifice 52, a level detector 79 of the liquid medium 53 is electrically connected to a valve 80 on the tubing 67 cutting off the current of liquid medium 53.

  
The apparatus for degassing flowing liquid media operates as follows.

  
The starting liquid medium 3 is admitted into the container 1 of rectangular shape, formed by the walls

  
  <EMI ID = 42.1>

  
through the inlet orifice 2 disposed in the cover 11 in the vicinity of the side wall 6 and flows along the bottom 10 (according to arrow D) from the inlet orifice 2 to the orifice of outlet 4 arranged in the lower part of the side wall 7 connected to the bottom 10. Next, the liquid medium 3 fills the container 1 up to

  
  <EMI ID = 43.1>

  
separating from the bottom 10 of the lower edges 15 of the vertical partitions 13 placed between the side wall 8
(fig. 2) and the side wall 9 of the container 1 (fig. 1) and installed one after the other opposite the inlet orifice 2 (fig. 2). The current of the liquid medium 3 passes successively through the zones 14 formed by the vertical partitions 13 where it is subjected to the action of the acoustic oscillations excited there by the acoustic transducers 17 installed upstream of each vertical partition
13, except before the last.

  
Under these conditions, an isolated gas bubble 5 will

  
  <EMI ID = 44.1>

  
surface of the acoustic transducer 17 is subjected to the action of the acoustic oscillations excited by the acoustic transducers 17 which cause it to rise, the height

  
as can be calculated using the equation of forces acting on a gas bubble in an acoustic field.

  
Even if the isolated gas bubble 5 rises above the

  
  <EMI ID = 45.1>

  
this inlet 2, over an insufficient height and is thereby driven by the viscous forces of the liquid medium 3 flowing in the space above the acoustic transducer 17 according to it rises in this space at a height exceeding the previous one.

  
The liquid medium 3 passes from one zone 14 to another under the lower edges 15 of the vertical partitions 13 each of which is available, relative to the bottom 10 of the container.

  
  <EMI ID = 46.1>

  
the previous partition, counting from the inlet 2, as a result, the isolated gas bubble 5 rises

  
  <EMI ID = 47.1>

  
between the respective partition 13 and the bottom 10 of the container 1.

  
In addition, in the liquid medium 3 passing over each acoustic transducer 17 other gas bubbles 5 are formed which add to those already existing in the liquid medium 3, their dimensions. increase, they meet intensely, are braked, stop and are pushed upwards where they collide with the vertical partitions 13, rise towards the surface 19 of the liquid medium 3, burst and definitively leave the container 1 through the drainage pipes 12.

  
Even if the gas bubbles 5 have not succeeded in any section of the bottom 10 of the container 1, to meet, to reach a necessary dimension and to rise to

  
  <EMI ID = 48.1>

  
captured by the vertical partition 13 and, consequently, are entrained by the viscous forces of the current of the liquid medium 3 in the space above the other acoustic transducer: 17, they meet there, under the action of acoustic waves, with gas bubbles

  
5 newly formed and rise to a necessary height

  
  <EMI ID = 49.1>

  
the vertical partition 13, rise towards the surface 19 of the liquid medium 3 and are eliminated from the container 1 to 1 through the drainage pipes 12.

  
As the section through which the current of the liquid medium 3 decreases, the lower edges 15

  
vertical partitions 13 being placed lower and lower, and the volume of the liquid medium 3 passing through these sections remains constant, the speed of the current of the liquid medium 3 as it passes under the lower edges
15 of each vertical partition 13 next, counting

  
from inlet 2, increases. According to Bernoulli's law, the increase in the speed of flow of the liquid medium 3 when passing through the different sections causes the pressure drop in the liquid medium 3 which promotes an accelerated formation of new gas bubbles 5 and their elimination from the liquid medium 3.

  
  <EMI ID = 50.1>

  
lower edges 15 of the vertical partitions 13 each of which is disposed, relative to the bottom 10 of the container 1,

  
  <EMI ID = 51.1> vertical partition 13, previous, counting from the ori-

  
  <EMI ID = 52.1>

  
between the sections of the stream of the liquid medium 3 under the lower edges 15 of the vertical partitions 13 causes a small increase in the speed and the pressure difference in the stream of the liquid medium 3 which results in an ineffective evacuation of the bubbles of gas from the liquid medium 3.

  
When the liquid medium 3 in flow passes under the lower edges 15 of the vertical partitions 13 each of which is disposed, relative to the bottom 10 of the container

  
  <EMI ID = 53.1>

  
vertical partition 13, next by counting the inlet 2, with a value of 0.1 of L2, the difference between the sections of the stream of the liquid medium 3 'under the lower edges 15 of the vertical partitions 13 causes strong turbulence in the current of the liquid medium 3 under the edges 15 of the vertical partitions 13. Consequently, the gas bubbles 5 are entrained from the upper layers of the liquid medium 3 and their forced passage under the vertical partitions 13.

  
If the current of the liquid medium 3 passes through the container 1 of rectangular shape through the zones 14 above the acoustic transducers 17 from the inlet port 2 to the outlet port 4, the current takes a rectangular shape and acoustic oscillations are transmitted to this current of these oscillations is distributed regularly from the

  
central part of the flow of the liquid medium 3 towards its peripheral part in the direction transverse to the flow of the liquid medium 3. This makes it possible to obtain an effect of regular elimination of gas bubbles 5 from the liquid medium in the direction of its flow this

  
which ensures guaranteed quality of evacuation of gas bubbles 5 from the liquid medium 3.

  
In addition, during the passage of the liquid medium 3 under the lower edges 15 looking at the bottom 10 of the container 1 and produced, in the direction transverse to the flow of the liquid medium 3, along a curve essentially repeating the distribution curve of the intensity of the acoustic oscillations excited in the liquid medium 3 by the acoustic transducer 17, the section of the liquid medium current varies in vertical plane. Therefore, above the central part of the acoustic transducer 17 where the acoustic waves at maximum intensity are excited, by the same time interval passes a volume of liquid medium 3 greater than that which passes above its peripheral part which increases the production of the device without affecting the quality of degassing.

  
In addition, the current of the liquid medium 3 in the zones 14 is subjected to the action of the acoustic oscillations excited by the acoustic transducers 17 which act perpendicular to its direction which causes a deviation of the trajectory of the gas bubbles over an angle increased by compared to the horizontal and therefore the gas bubbles rise faster

  
at the surface 19 of the liquid medium 3, they burst and

  
are definitively evacuated from the container 1 through the drainage pipes 12.

  
In addition, the acoustic oscillations excited in the zones 14 by the acoustic transducers 17 are transmitted to the current of the liquid medium 3 in a more complete manner along the vertical axis of symmetry of the vertical partitions 13 thanks to the fact that any transmission of the acoustic oscillations at the bottom 10

  
of container '1 in the direction of flow of the liquid medium 3, preventing braking in this direction of bubbles

  
  <EMI ID = 54.1>

  
stiques 17 are connected to the bottom 10 by means of the elements 18 made of an acoustic absorbing material.

  
In the liquid medium 3 passing over the section 16 of the bottom 10 made of an acoustic absorbing material and arranged upstream of the vertical partition 13 last, counting from the inlet orifice 2, the formation of new gas bubbles 5 does not take place. The gas bubbles 5 d formed in the liquid medium 3 as a result of the installation of the last acoustic transducer 17

  
counting from the inlet orifice 2 are completely intercepted by the vertical partition 13, the latter counting from the inlet orifice 2, because it is installed at a sufficient distance from the previous partition.

  
The current of the liquid medium 3 flows from the container 1, completely rid of the gas bubbles 5, through the orifice 4, new gas bubbles 5 not being formed in the zone 14 upstream of the vertical partition 13 , last counting from the inlet 2, since there is no acoustic transducer 17 upstream of this vertical partition 13.

  
  <EMI ID = 55.1>

  
when 3 drops in the container 1, the float 24 begins to descend and drives the lever 21 hinging to the float 24. Because an arm of the lever 21 is hingedly connected to the tube 20 installed in the inlet orifice 2 of the container 1 and its other arm is connected by articulation to the lever 22, the lever 21 begins to descend which causes the downward movement of the lever 22.

   As the lever 22 is hingedly connected to the lever 23 carrying the vertical partitions 13, the vertical partitions 13 also begin to descend by reducing the value of the section of the current of the liquid medium 3 passing under the lower edges 15 of the vertical partitions 13. , when the flow of the liquid medium decreases, the acoustic oscillations are excited by the acoustic transducers 17 in the current of the liquid medium 3 of a lower section which allows the gas bubbles 5 to be evacuated more efficiently.

  
With the increase in the flow rate of the liquid medium 3, each vertical partition 13, following, counting from

  
  <EMI ID = 56.1>

  
L3 'L4 lower than that to which the previous partition rises, since the lever 23 carrying the vertical partitions 13 is connected at one end to the cover 11 of the container 1. This causes an increasing difference between the values of the sections of the liquid medium flow

  
3 passing under the lower edges 15 of the vertical partitions 13, which gives rise to a further difference

  
in addition increasing between the velocities of the current of the liquid medium 3 passing through these sections as well as an increasing pressure difference causing an accelerated elimination of the gas bubbles 5 from the liquid medium 3. When the level of the surface 19 of the liquid medium 3 goes up and the lever 23 goes up too, engages the

  
block of microswitches 25 whose electrical signal

  
is delivered to the switching device 26 which ensures a successive start-up of the acoustic transducers 17. Then, it starts up a number of acoustic transducers 17 necessary to obtain a guaranteed efficiency of evacuation of gas bubbles 5 from the liquid medium 3.

  
When the level of the surface 19 of the liquid medium

  
3 drop and lever 23 carrying the vertical partitions

  
13 goes down, the block of microswitches engages and by the switching device 26 puts the acoustic transducers 17 to rest, which makes it possible to exclude a vacuum operation of the acoustic transducers 17

  
while guaranteeing the degassing quality of the reduced current of the liquid medium 3.

  
When the liquid medium passes through an apparatus consisting of several receptacles 1 communicating with each other and arranged one after the other, each being placed higher than the preceding receptacle by a distance h, the current of the liquid medium 3 passing under the lower edges 15 of the vertical partitions 13 flows through the outlet orifice 4 formed on the side wall of each container 1 which makes it possible to increase the efficiency of the device.

  
In this case, the current of the liquid medium 3 passing through each container 1 is divided at height h by rectangular orifices 27 made in the vertical partitions 13 at the bottom 10 of the container 1, following in the direction of flow of the medium liquid 3, which makes it possible to separate the upper layers of the liquid medium 3 containing gas bubbles 5 and to send them to the next container 1 to continue to evacuate the gas bubbles 5.

  
Thus, the flow of the degassed liquid medium 3 passes under the lower edges 15 of the vertical partitions 13 and flows through the outlet orifice 4 of each container 1 situated lower than the height h, which makes it possible to evacuate the gases with high efficiency and simultaneously increase the efficiency of the device.

  
When the current of the liquid medium 3 flows from one container 1 into the other, the number of gas bubbles 5 is controlled by the detector 28 installed between the neighboring containers 1. If the liquid medium 3 contains a large quantity of gas bubbles 5, the detector 28 delivers a signal to the switching device 29 which stops the acoustic transducers 17 of each container 1 successively, in the direction of flow

  
liquid medium 3, while the elimination of gas bubbles 5 continues in each next container 1, in the direction of flow of liquid medium 3, only

  
  <EMI ID = 57.1>

  
wedges 13.

  
In another alternative embodiment of the device, the liquid medium 32 arrives through the inlet orifice 31 formed in the cover 37 coaxially with the axis of symmetry of the container 30, and passes through a channel of constant section formed by the side wall 35 of the cylindrical container 30 and the auxiliary vertical partition
39 produced in the form of a spiral, the center of which is coaxial with the center of the inlet orifice and connected to the bottom 36 of the container 30. In its movement, the current of the liquid medium 32 passes through the zone 41 formed by the turn of vertical wall 39, first with respect to

  
  <EMI ID = 58.1>

  
tick 45 installed coaxially with the inlet port 31 of the container 30.

  
Because the central part of the current of the liquid medium 32 passing through the zone 41 above the center of the acoustic transducer 45 is subjected to the action of

  
  <EMI ID = 59.1>

  
its other part, the gas bubbles 34 moving in the central part of the current of the liquid medium 32 with a higher speed are braked more strongly under the action of acoustic oscillations. Under these conditions, in the liquid medium 32 of the zone 41 are formed new gas bubbles 34 which are added to those already existing in the liquid medium 32, their dimensions increase, they meet in an intense way, are braked stop and are pushed upwards where they are intercepted by the winding

  
  <EMI ID = 60.1>

  
32, burst and are definitively evacuated from the container 30 through the drainage pipes 38.

  
In addition, the current of the liquid medium 32 passing through the inlet orifice 31 of the container 30 is subjected to acoustic oscillations excited by the acoustic transducer 45 installed coaxially with the inlet orifice 31 of the container 30 in the direction opposite to the direction of flow of the liquid medium which causes more effective braking and stopping of the gas bubbles 34, their rise to the surface 46 of the liquid medium 32 and their elimination from the zone 41 and then from the container

  
30 through the drainage pipes 38.

  
In this case, the acoustic oscillations excited in the zone 41 by the acoustic transducer 45 are transmitted to the current of the liquid medium 32 in a more complete manner without losses, the transmission of the acoustic oscillations to the bottom 36 of the container 30 being excluded from the fact that the acoustic transducer 45 is connected to the bottom 36 via the element 48 made of an acoustic absorbing material.

  
Then the liquid medium 32 arrives in the areas
42 formed by the side wall 35 of the container 30 cy-

  
  <EMI ID = 61.1>

  
40 rectangular wedges installed transversely to the flow of the liquid medium 32. From one zone 42 to the other, the current of the liquid medium 32 passes under the lower edges of the vertical partitions 40 each of which is located

  
  <EMI ID = 62.1>

  
and is subjected to the action of the acoustic oscillations excited in the liquid medium 32 by the acoustic transducers 47 installed upstream of each vertical partition 40, except upstream of the last, so that the acoustic wave at maximum intensity is transmitted to the current of the liquid medium 32 passing through the section coinciding with the vertical axis of symmetry of the partition 40.

  
Under these conditions, an isolated gas bubble 34 rises in the liquid medium 32 under the action of the acoustic oscillations excited there by the acoustic transducer 47 in the same way as in the previous variant embodiment of the device.

  
Besides this, in the liquid medium 32 passing over
-above each acoustic transducer 47 new gas bubbles 34 are formed which are added to those existing in the liquid medium 32 and which are discharged from the container 30 in the same way as in the previous variant of the device .

  
Because the section through which the current of the liquid medium 32 passes under the lower edges 43 of the vertical partitions 40 decreases when these are lowered, the formation of new gas bubbles 34 and their elimination from the liquid medium 32 accelerate .

  
When the current of the liquid medium 32 passes under the lower edges 43 of the vertical partitions 40 each of which is disposed relative to the bottom 36 container 30 at a distance less than 0.05 of the distance separating from the

  
  <EMI ID = 63.1>

  
tance separating from the bottom the next vertical partition 40 counting from the inlet orifice 31, the difference between the sections of the flow of the liquid medium 32 under the lower edges 43 of the vertical partitions 40 allows elimination of the gas bubbles 34 as described for the variant of the previous device.

  
When the liquid medium 32 flows through the spiral channel of constant section in the zones 42 above the acoustic transducers 47 installed so that the acoustic wave of maximum intensity is transmitted to the current of the liquid medium 32 passing through the section coinciding with the vertical axis of symmetry of the vertical rectangular partition 40 (next, arrow C) from the inlet orifice 31 to the outlet orifice 33, this current also adopts a rectangular section. Consequently, the intensity of the acoustic oscillations excited in the current by the acoustic transducers 47 is distributed regularly in the transverse direction to the direction of the current of the liquid medium 32 which makes it possible to achieve the effect of regular evacuation

  
gas bubbles 34, in the same way as in the previous variant of the device.

  
In addition, the current of the liquid medium 32 in the zones 42 is subjected to the action of the acoustic oscillations excited by the acoustic transducers 47 which act perpendicular to the direction of the flow which causes the rise of the trajectory of the gas bubbles.
34 with respect to the horizontal by a greater angle and, consequently, the faster arrival of gas bubbles on the surface 46 of the liquid medium 32 and their final elimination from the container through the drainage pipes 38.

  
When the current of the liquid medium 32 passes under the vertical rectangular partitions 40 whose lower edges 43 looking at the bottom 36 of the container 30 are made, across the direction of flow of the current of the liquid medium 32, along a curve essentially repeating the curve of distribution of the intensity of the acoustic oscillations excited in the liquid medium 32 by the acoustic transducer 47, the section of the medium current varies which contributes to the increase in the efficiency of the device, in the same way as in the previous variant of the device.

  
In addition, the acoustic oscillations excited in the zones 42 by the acoustic transducers 47 are transmitted in a more complete manner along the vertical axis of symmetry of the vertical partitions 40,

  
  <EMI ID = 64.1> are connected to the bottom 36 of the container 30 by means of the elements 48 made of an acoustic absorbing material.

  
When the liquid medium 32 passes through the spiral channel of constant section, its course increases which causes its stay to extend in the zones 42 where it is subjected to the action of the acoustic oscillations excited by the acoustic transducer 47. This allows reduce the size of the device and save production areas while ensuring the quality of evacuation of gas bubbles 34 from the liquid medium 32.

  
In the liquid medium 32 passing over the section 44 of the bottom 36 made of an acoustic absorbing material, new gas bubbles 34 do not form. The gas bubbles 34 formed by the presence of the acoustic transducer 47, the latter relative to the inlet orifice 31, are intercepted by the vertical partition
40, last with respect to the inlet orifice 31, this partition being installed at a sufficient distance from the previous one.

  
The current of the liquid medium 32 exits through the outlet orifice 33 without gas bubbles 34 thanks to the absence, as in the previous variant of the device, of an acoustic transducer 47 upstream of the vertical partition 40, the latter with respect to at inlet 31.

  
In another variant of the device, the liquid medium 53 arrives through the inlet port 52 formed

  
in the cover 56 and located coaxially to the axis of symmetry of the cylindrical container 49, passes into the zone
59 formed by the vertical partition 58 cylindrical, first relative to the inlet orifice 52, installed coaxially with the inlet orifice 52, where the liquid medium

  
  <EMI ID = 65.1>

  
excited by the acoustic transducer 63 also installed coaxially with the inlet orifice 52 of the container 49.

  
The central part of the current of the liquid medium 53 passing in the zone 59 above the center of the acoustic transducer 63 is subjected to the action of acoustic oscillations of a greater intensity than its other part which causes the result analogous to the result described for the previous variant.

  
In this case, in the zone 59 are formed new gas bubbles 55 which are added to those existing in the liquid medium 53, they divide larger, meet in an intense way, are braked, stop, are pushed upwards where they are intercepted by the vertical partition 58, first with respect to the inlet orifice 52, then they rise to the surface 64 of the liquid medium 53, burst and are definitively evacuated from the container 49 by the drainage pipes 57.

  
The current of the liquid medium 53 passing through the inlet orifice 52 of the container 49 is subjected to the action of acoustic oscillations, excited by the acoustic transducer 63, installed coaxially with the inlet orifice
52, in the opposite direction to the direction of flow of the liquid medium 53 which gives the result similar to that described in the previous variant.

  
Acoustic oscillations excited in the area
59 by the acoustic transducers 63 are transmitted to the current of the liquid medium 53 in a more complete manner without losses, owing to the fact that the acoustic transducer 63 is connected to the bottom 51 of the container 49 by means of an element 66 made of a material acoustic absorber.

  
Then, the liquid medium 53 arrives in the zones
60 formed by the side wall 50 of the container 49 cy-

  
  <EMI ID = 66.1>

  
following with respect to the inlet port 52, installed coaxially with one another and to the inlet port 52.

  
The current of the liquid medium 53 passes from one zone 60 to another under the lower edges 61 of the vertical partitions 58 each of which is located at a distance from the bottom
(N1> N2> N3), less than the previous one, counting from the inlet orifice 52, the current of liquid medium is subjected to the action of acoustic oscillations.

  
  <EMI ID = 67.1>

  
acoustic sensors 65 installed upstream of each vertical partition 58 so that the acoustic wave of maximum intensity is transmitted to the current of the liquid medium
53 passing through the section coinciding with the vertical axis of symmetry of the vertical partition 58.

  
Under these conditions, a gas bubble 55 isolated in the liquid medium 53 rises under the action of the acoustic oscillations excited by the acoustic transducers 65, in the same way as in the previous variants of the device.

  
In addition, in the liquid medium 53 passing over each acoustic transducer 65 new gas bubbles 55 are formed which are added to those existing in the liquid medium 53, they grow, reunite intensely, are braked, stop and rise to be evacuated from the container 49 in the same way as that described for the previous variants of the device.

  
As the vertical cylindrical partitions 58 are installed coaxially to each other and to the inlet port 52, the current of the liquid medium 53 passes from the inlet port 52 to the outlet port 54 along the bottom 51 of the container 49 spreading in all directions.

  
In this case, the value of the cross-section of the current of the liquid medium 53 at the distance from the inlet orifice 52 decreases folds appreciably than in the previous variants, due to the lowering of each vertical partition 58, next by counting the inlet orifice 52, as well as due to the increase in the area of each zone 60, next counting by the inlet orifice 52, this area being determined by the length of the circumference of the edges 61 of the vertical partitions 58 looking at the bottom 51.

  
The passage of the liquid medium 53 lower than the lower edges of the vertical partitions 58 without touching the latter is prevented due to the equality of the passage sections under the edges 61 looking at the

  
bottom 51 of each of the vertical partitions 58.

  
Because the cross-section of the flow of the liquid medium 53 under the lower edges 61 of the vertical partitions 58 decreases with the lowering of each partition, the formation of new bubbles

  
gas 55 and their evacuation from the liquid medium 53 accelerate.

  
On passing the current of the liquid medium 53 under the lower edges 61 of the vertical partitions 58 each of which is located relative to the bottom 51 of the container 49

  
at a distance different from that separating the next partition from the bottom, counting from the input screen 52 the difference value between 0.05 and 0.1 of the distance between the bottom and this partition following the difference between the sections of the stream of the liquid medium 53 under the edges 61 of the vertical partitions 58 causes the elimination of the gas bubbles 53 as described for the previous variants of the apparatus.

  
On passing the current of the liquid medium 53 under the lower edges 61 these vertical partitions 58, each of which is located, relative to the bottom 51 of the container
49, at a distance less than the distance separating

  
from the bottom the next vertical partition 58, counting from the inlet 52, with a value of 0.05 of this distance between the bottom and the next partition, or greater than the distance separating from the bottom the vertical partition
58 previous, counting from the inlet 52, with a value of 0.1 of this distance between the previous partition and the bottom, the difference in sections

  
of the current of the liquid medium 53 under the lower edges 61 of the vertical partitions 58 conditions the elimination of the gas bubbles 55 as it

  
is described for previous versions of the device.

  
In addition, the current of the liquid medium 53 in

  
the zones 60 is subjected to the acoustic oscillations excited by the acoustic transducers 65 which act perpendicular to the direction of its flow which causes the upward deviation of the trajectory of the gas bubbles 55, with respect to the horizontal, at a more large and therefore gas bubbles rise faster to the surface
64 of the liquid medium 53 and are definitively eliminated from the container 49 through the drainage pipes 57.

  
In addition, the acoustic oscillations excited in the zones 60 by the acoustic transducers 65 are transmitted more completely along the vertical axis of symmetry of the vertical partitions 58 in the same way.

  
than in the previous variants of the device because the acoustic transducers 65 are connected to the bottom
51 of the container 49 by means of the elements 66 made of an acoustic absorbing material.

  
In the liquid medium 53 passing through the zone 60 formed by the vertical partitions 58, penultimate and last counting from the inlet orifice, the gas bubbles 55 do not form due to the absence of acoustic transducer 65 upstream of the last vertical partition 58 and the fact that the section 62 of the bottom 51 upstream of the vertical partition 58, last including the inlet orifice 52 ', is made of an acoustic absorbing material. The gas bubbles 55 formed by the presence of the acoustic transducer 65, the latter counting from the inlet orifice 52, are intercepted by the vertical partition 58, the latter counting from the inlet orifice 52, this partition being installed a sufficient distance from the previous one.

  
Under these conditions, the passage of the current of the liquid medium 53 lower than the vertical partitions 58 without touching them is prevented by maintaining the equality of the passage sections under the lower edges 61, looking at the bottom 51 of each of the vertical partitions
58.

  
In the zone 60 formed by the vertical partition 58, last relative to the inlet orifice 52, and the side wall 50 of the container 49, the stream of liquid medium moves in circumference along the side wall
50 from the container 49 towards the outlet orifice 54 and flows without any gas bubble 55.

  
Thus, the structure of the device makes it possible to evacuate the gas bubbles 55 from the current of the particularly viscous liquid medium 53, for example, quartz glass, with high efficiency.

  
To readjust the device in the event of switching to another liquid medium 53, having a different viscosity, the procedure is as follows: using the adjusting nut 71 the sleeve 68 installed on the tubing 67 placed is moved in the inlet orifice 52, one end of the sleeve being brought, by means of the thrust washer 70, to the cover 56 of the container 49 and is

  
  <EMI ID = 68.1>

  
device and while controlling the bubble content of

  
gas 55 of the current of the liquid medium 53 exiting through the outlet orifice 54, the nut 71 begins to mount the socket 68. As at the end of the socket 68, the arms of the levers 69 carrying the freely mounted partitions 58, while other arms of the levers 69 are movably fixed to the neck

  
  <EMI ID = 69.1>

  
vertical partitions 58, freely mounted, via the <EMI ID = 70.1>

  
the notches of the levers 69, which increases the cross-section for the flow of liquid medium 53 passing under the lower edges 61 of the vertical partitions 58.

  
Then, each cylindrical vertical partition 58, next counting from the inlet orifice 52, moves by a lesser distance than the previous partition, ensuring the difference between the sections of passage of the current of the liquid medium 53 this difference in sections providing an effect similar to that described for

  
the previous variant of the device.

  
The rise of the vertical partitions 58 with the aid of the socket 68 continues until the next increase in the flow rate of the liquid medium 53 through the apparatus would risk adversely affecting the quality of the evacuation of the bubbles.

  
of gas 55 and that the difference in the rise heights of

  
  <EMI ID = 71.1>

  
of the inlet orifice 52, ensures the equality of the passage sections for the current of the liquid medium 53 under the lower edges 61 of the vertical partitions 58, first and last, counting from the inlet orifice 52. The adjustment of the device is finished and the nut 71 is immobilized by the lock nut 72. The height at which the socket 68 is located on the pipe 67 relative to the bottom 51 of the container 49 is read on the scale 74 provided

  
of the indicator 74, disposed on the cover 56 and rigidly connected to the socket 68. When processing a liquid medium 53 having a viscosity such that the device was already set, the socket 67 is fixed at the height known with respect to the bottom 51 of the container 49, without presetting. If the flow rate of the liquid medium 53 through the device changes,

  
  <EMI ID = 72.1>

  
by the vertical partition 58, the last one counting from the inlet orifice 52, and the side wall 50 of the receptacle 49, is controlled by the detector 79 installed in this zone 60 and electrically connected to the valve 80 of the tubing 67. If the surface level 64 of the liquid medium becomes lower than the lower edge 61 of the vertical partition 80, the latter in relation to the inlet orifice, the valve 80 cuts the current of the liquid medium 53 arriving through the tubing 67.

CLAIMS

  
1. Apparatus for degassing flowing liquid media which comprises: a container (1, 30, 49) having

  
an inlet port (2, 31, 52) for the admission of the liquid medium (3, 32, 53), from the outlet and a port

  
outlet (4, 33, 54) of the degassed liquid medium (3, 32, 53)

  
and provided with drainage pipes (12, 38, 57) for evacuating the gases from the device, a series of vertical partitions (13, 40, 58) installed in the container (1, 30,

  
49) one after the other and arranged at a distance of

  
its bottom (10, 36, 51) to let the current of the liquid medium (3, 32, 53) pass along the bottom (10, 36, 51) of the container (1, 30, 49) from the orifice inlet (2, 31, 52) to the outlet (4, 33, 54), and an acoustic transducer (17, 45, 47, 63, 65) connected to the bottom (10,

  
36, 51) of the container (l, 30, 49) and used to excite therein

  
acoustic waves, apparatus, characterized

  
in that each vertical partition (13, 40, 58) follows

  
counting from the inlet (2, 31, 52) admitting

  
the liquid medium (3, 32, 53), is arranged at a distance

  
  <EMI ID = 73.1>

  
from the bottom (10, 36, 51) of the lower container (1, 30, 49)

  
to that separating at least the preceding vertical partition from the bottom, an acoustic transducer (17, 45, 47, 63, 65) being installed upstream of each partition (13, 40, 58), except upstream of the last.

  
  <EMI ID = 74.1>


    

Claims (1)

 <EMI ID = 75.1> laughed in that each vertical partition (13, 40, 58), following, counting from the inlet orifice (2, 31, 52) admitting the liquid medium (3, 32, 53), is disposed relative to the bottom (10, 36, 51) of the container (1, 30, 49) to a distance whose value is between 0.05 and 0.1 the distance from the bottom (10, 36, 51) of the  <EMI ID = 76.1> 3. Apparatus according to claim 1, c a r a c t e r i s in that the vertical partitions (13. 40, 58) are provided with devices for adjusting their displacement in the vertical plane. 4. Apparatus according to claim 1, c a r a c t é r i sé in that the acoustic transducer (17, 45, 47, 63, 65) installed upstream of each vertical partition (13, 40, 58) is connected to the bottom (10, 36, 51) of the container (1, 30, 49) by means of elements (18, 48, 66) made of a sound absorbing material and a section  <EMI ID = 77.1> 30, 49) upstream of the last vertical partition (13.40, 58) discounting from the inlet (2, 31, 52) for the liquid medium (3, 32, 53), is also made of an acoustic absorbing material. 5. Apparatus according to claim 1, c a r a c t é r i sé in which vertical partitions (13) are rectangular in shape and arranged in a container (1) rectangular in shape, between its side walls (8, 9) opposite the inlet orifice (2) for the liquid medium (3), across the direction of its flow and, moreover, the acoustic transducer (17) installed upstream of each partition ( 13) is arranged so that its acoustic wave of maximum intensity is transmitted to the current of the liquid medium (3) passing through the section coinciding with the vertical axis of symmetry of the vertical partition (13). 6. Apparatus according to claims 3, 5, character ized in that the device for adjusting the displacement of the vertical partitions (13) in the vertical plane comprises a tube (20) placed in the inlet orifice (2) for the starting liquid medium (3), a float (24) and a system of levers (21, 22, 23),  <EMI ID = 78.1> and is rigidly fixed to the cover (11) of the container (1), while another lever (21) is connected by articulation to the tube (20) and to the float (24), said levers (23 and 21) being interconnected by the third lever (22). 7. Apparatus according to claim 6, characterizes in that it is provided with a block of microswitches (25) mounted on the lever (23) carrying the vertical partitions (13) and electrically connected to the acoustic transducers ( 17), except for the first counting the inlet (2) for the liquid medium (3), by means of a switching device (26) which ensures their successive start-up. 8. Apparatus according to claim 5, c -aract é ized in that it comprises several containers (1) communicating with each other and arranged one after the other, each next container being placed higher than the previous to a height equal to:  <EMI ID = 79.1>  <EMI ID = 80.1> R is the radius of a gas bubble (5);  <EMI ID = 81.1> gas bubble (5-; relative to the surface of the acoustic transducer (17); is the length of the transducer surface acoustic (17); is the viscosity of the liquid medium (3);  <EMI ID = 82.1> Re is the Reynolds number; C is the speed of sound in the liquid medium (3); e is the base of natural logarithm; 0.7 is the safety factor which takes into account fluctuations in the parameters of the acoustic field and of the liquid medium (3), the last vertical partition (13) counting from the ori-  <EMI ID = 83.1> each container (1) being produced with a rectangular orifice (27) disposed at the bottom (10) of the container (1), in the direction of the current of the liquid medium (3). &#65533;. Apparatus according to claim 8, c a r a c - in that between neighboring containers (1) a detector (28) is placed to monitor the content in gas bubbles (5) of the liquid medium (3), detector electrically connected to the acoustic transducers (17) of the container (1), located downstream of the detector (28), by means of a switching device (29), which activates the transducers  <EMI ID = 84.1> the direction of the flow of the liquid medium (3). 10. Apparatus according to claim 1, characterized in that it comprises an auxiliary vertical partition (39) installed in a cylindrical container (30) and produced in the form of a spiral whose center is coaxial with the center of the inlet opening (31) of the liquid medium (32) and which forms a spiral channel of constant section in which are installed, across the direction of the current of the liquid medium (32), vertical partitions (40) rectangular , while, coaxially with the inlet orifice (31) of the liquid medium (32), an acoustic transducer (45) "is installed, the acoustic wave of maximum intensity of which coincides with the axis of symmetry of the inlet orifice and that the acoustic transducer (47) installed upstream from <EMI ID = 85.1> so that its maximum intensity acoustic wave is transmitted to the current of the liquid medium (32) passing through the section coinciding with the vertical axis of symmetry of the vertical partition (40). 11. Apparatus according to claim 5 or 10, characterized in that each of the vertical partitions (13, 40) of rectangular shape at its edge (15,43) looking at the bottom (10, 36) of the container (1, 30) formed, transverse to the direction of the current of the liquid medium (3, 32) along a curve which substantially repeats the intensity curve of the acoustic waves excited in the liquid medium (3, 32) by the acoustic transducer (17, 47) installed upstream of each partition (13, 40 ). 12. Apparatus according to claim 1, characterized in that the vertical partitions (58) are cylindrical and are installed across the direction of the flow of the liquid medium (53) in a container (49) of cylindrical shape coaxially the one to the other and to the inlet orifice (52) for the admission of the liquid medium (53), coaxially to which an acoustic transducer (63) is installed whose acoustic wave of maximum intensity coincides with the axis of symmetry of the inlet orifice (52), and that an acoustic transducer (65) installed upstream of each partition (58) is arranged so that its acoustic wave of maximum intensity is transmitted to the current of the medium liquid (53) passing through the section coinciding with the vertical axis of symmetry of the vertical partition (58). 13. Apparatus according to claim 12, c a r a c t e r i in that it has a device for adjusting the displacement of the vertical partitions (58) in the green plane.  <EMI ID = 86.1> inlet (52) for the admission of the starting liquid medium, a sleeve (68) mounted with the possibility of axial displacement on the tube (67) and, articulating at the end of the sleeve (68), levers (69) carrying the vertical partitions (58), mounted freely, and movably connected to the lid (56) of the container (49).