MXPA97005429A - Container for liquid with dedispers device - Google Patents

Abstract

The present invention relates to a liquid container that includes a liquid inlet and a medium near the inlet, for supplying saturated gas liquid under pressure to the liquid supplied through the inlet, characterized in that the delivery means includes a distribution pipe means having an internal cylindrical wall, the supply means further comprising a pre-disperser pipe means positioned within the internal cylindrical wall of the distribution pipe means and the pre-disperser pipe means being connected To a gas-filled liquid supply pipe, the pre-disperser pipe means has at least one throttle hole positioned to discharge liquid into the distribution pipe means, in a direction substantially perpendicular to the internal cylindrical wall of the medium. distribution pipeline, and because the pipeline medium is provided with At least one water outlet hole through which the dispersion water is discharged directly into the container, while being exposed to a decrease in pressure instantaneously

Description

"CONTAINER FOR LIQUID WITH DISPERSION DEVICE" TECHNICAL FIELD The present invention relates to a liquid container that includes a liquid inlet and a means for supplying the liquid saturated with pressurized gas, to the liquid introduced through the inlet in the close proximity thereof.

DESCRIPTION OF THE BACKGROUND OF THE TECHNIQUE Flotation plants are used to an ever increasing degree in the purification of water, both drinking water and sewage water, with the intention of increasing the rate at which water flows through the purification plant and with this also allows the size of the necessary tanks, and therefore the purification plant with one set is reduced. With regard to drinking water, the requirements of the final product are essentially unitary and the construction of a purification plant is determined essentially by the nature of the source or origin of the water. When the water source is a lake or river, the coarse particles are normally separated from the water in a selection chamber, after which the water is purified chemically and biologically by adding precipitation and flocculation agents in a flocculation chamber. . The precipitated particles are then separated from the water, allowing the particles to settle to the bottom of a sedimentation tank by gravitation. The different types of particles will have different densities and with these different sedimentation regimes. In order for the particles of low density, "light particles" to have time to settle as the water passes through a sedimentation tank, the tank must be provided with a large surface area in order to provide the period of time prolonged that is required for the light particles to settle or settle. The separation times of particles can be greatly reduced by flotation processes, where microscopic air bubbles are added to the water to which particles or particle clumps in the water adhere, These bubbles also contribute to form particle lumps and to maintain consistency of the grumo. The air bubbles rise rapidly to the surface of the water, carrying with them the particles and clumps of particle adhered, forming these clumps a stable coating of silt on the surface of the water that can be removed with the help of scrapers or rising intermittently the level of water in the flotation tank so that the silt liner flows into the silt chute that is provided on one side of the tank. The microscopic air bubbles used in the flotation processes have a diameter of 30 to 80 micrometers and can not be produced by simply injecting the air directly into the water, for example. Microscopic air bubbles intended for drinking water flotation processes are normally produced by releasing the pressurized air to clean water from a pressure vessel. The highest possible degree of saturation is sought in this regard. This water, which is usually referred to as the dispersion water, is conducted to an inlet for the water that has undergone a flocculation process, the so-called flocculated water, and which is located at the bottom of the flotation tank, while the high pressure of the water is supplied to the flocculated water through separate jets or jets that are built to generate an instantaneous decrease and the pressure to a level at which the air dissolved in the water is released in the form of microscopic bubbles and forms a dispersion of air in the water.

These pressure vessels used to produce highly pressurized dispersion water that has been saturated with air to the greatest possible extent, are normally kept half filled with the water with the help of the control equipment and the associated water level detector means. Compressed air is supplied to the space filled with air above the surface of the water, and water is often supplied through a nozzle mounted on a side wall of the container in the space filled with air. This water is injected into the opposite side wall of the container such that the water jet will disintegrate to a certain degree as it impinges on it. The flotation method provides a considerably shorter water purification time, and the shortened time of the passage allows the purification plants to be manufactured smaller without deteriorating their previous capacity. This reduction in the space requirement of the purification plants opens new paths of use. However, the method not only carries certain advantages. Therefore, the method also makes the purification method more expensive because the water that has already been purified is recycled and used to produce dispersion water. In order to make the method more economical, refined methods are required to keep the dispersion water consumption at a low level, partially trying to increase the degree of air saturation in the dispersion water and partially improving the dispersion as the dispersion water flows into the flotation tank. As mentioned above, the dispersion water is introduced into the flotation tank through a number of nozzles, each of which includes a throttle valve that achieves the instantaneous decrease in dispersion water pressure that is required to release the air in the water and in this way form the microscopic bubbles. The nozzles are often mounted in a configuration similar to a grid on one side of a distributor pipe or conduit means that is several meters long and to which water is supplied through a half-feed pipe. along the distribution pipe, essentially at right angles to the nozzles. With respect to the configuration similar to a grille of the nozzles, the feed pipe can be made similar to a hole in which the handle of the grille is adjusted. A "grid" can include twenty-five nozzles screwed into the welded sleeves in the distribution pipe. The distribution pipes complete with the nozzles are relatively expensive and when the nozzles are made of plastic, the nozzles are easily damaged, for example, when cleaning the tanks.

COMPENDIUM OF THE INVENTION The object of the present invention is to provide a liquid container that includes a medium that distributes and disperses the liquid saturated with pressurized gas to a high degree of efficiency and effectiveness. Another object is to provide a medium that is both robust and relatively inexpensive to manufacture. These objects are achieved with a liquid container having the characteristic features indicated in the following claims.

BRIEF DESCRIPTION OF THE DRAWINGS The invention will now be described in greater detail with reference to an exemplary embodiment thereof and also with reference to the accompanying drawings, in which Figure 1 is a schematic sectional side view of a conventionally equipped flotation tank; - - Figure 2 is a partially sectioned front view of the medium of the invention for distributing and dispersing water saturated with air; and Figure 3 is a side view partially in section of the means shown in Figure 2.

DESCRIPTION OF A PREFERRED MODALITY Figure 1 is a schematic sectional side view of a conventionally equipped flotation tank generally represented by the reference number 1. The tank includes an inlet 2 to which the water is supplied from a flocculation chamber not shown. The water is caused to flow up into the tank 1, by means of a baffle or inclined barrier 3 mounted inwardly of the inlet 2. It is formed between the wall 4 of the tank and the deflector 3, a cavity into which a discharge is discharged. formation of nozzles or jets 5 mounted on a distribution pipe 6 that extends horizontally. The pipe 6 operates to supply the water saturated with air, the water of dispersion towards the flocculated water that flows towards the tank through the inlet 2, where the pressurized injected dispersion water accelerates the movement of the flocculated water. The nozzles or jets 5 are constructed to cause the pressure of the dispersion water to decrease instantaneously, thereby releasing the air from the dispersion water and forming microscopic bubbles which, as they move towards the surface of the water, collect the particles and 5 particle lumps and move most of these particles and lumps rapidly to the surface of the water, and in the same form a silt coating, which is removed and deposited in a channel 8 of silt placed adjacent to the = And wall 9 of the tank, with the help of some form of scraper 7 of mud, or removed in some other way. Heavy particles that can not be collected by microscopic bubbles that rise to the surface are captured in a filter 10 placed between the back side of the deflector 3 and the wall 9 of the tank and through which the purified or purified water passes on its way to a tank of purified water (not shown) through an outlet 11. Part of the purified water is pumped from the high pressure clean water tank to the inlet 13 of water from the pressure vessel 12. He pressure vessel 12, where the dispersion water is produced, is supplied with compressed air, from a compressor (not shown) through an air intake 14, and the water saturated with air is then fed back to the nozzles 5 mounted in the flotation tank 1, through an outlet 15 and a distribution pipe 6. Figure 2 is a front view partially in schematic section of the medium of the invention to which reference is generally made as 21, to distribute and disperse water saturated with air. The distribution and dispersion means includes a box consisting partially of a horizontally extending distribution pipe having dispersion water outlet holes 23 positioned along one side thereof (on the rear side in the Figure), and partially a pipe connection 24 mounted halfway along the distribution pipe to which a dispersion water supply pipe 25 is connected. Mounted inside the box there is a pre-disperser having throttle holes of the dispersion water 26 through which the dispersion water is forced to pass before reaching the distribution pipe 22, thereby decreasing the pressure of the water dispersion and effecting a certain degree of pre-dispersion. Figure 2 shows two pre-disperser modes, one in each half of the Figure. The pre-disperser 27 shown to the left of the line of symmetry is essentially accommodated in the pipe connector 24 and comprises a container that has been provided with throttling holes 26 and into which the supply line 25 is discharged. The reason why the air is only partially dispersed in the dispersion water as the dispersion water passes through the holes 26, is due to the fact that the decrease in pressure is not total, since part of the pressure is retained in the distribution pipe 22. The final equalization of the pressure and dispersion of the air is not effected until the pre-dispersed water passes through the exit holes 23. Because the holes 23 are positioned close to one another and evenly distributed, this dispersion in two steps is much more effective than the dispersion through the nozzles 5, between which a certain backpressure area or stagnant water occurs. The pre-disperser 28 shown to the right of the line of symmetry in Figure 2 is in the form of a pipe which is placed coaxially with the distribution pipe 22 which has been placed along one side of the holes 26 of strangulation through which the dispersion water supplied to the disperser 28 is pressed out through the extension of the supply pipe 25, where a certain degree of dispersion is carried out in the manner described above before dispersion. end during its passage through the holes 23. The holes 23 can be placed by narrow horizontal grooves or with a longitudinally extending groove of the pipe. The distribution and dispersion means shown to the right of Figure 2 is also shown in a side view partially in section in Figure 3. The different components are identified with the same reference signs used in Figure 2. directions in which the dispersion water flows in and between the two pipes, are indicated by arrows. The pre-disperser mode 28 shown in Figure 3 and the right-hand part of Figure 2 is particularly suitable for use with the extended distribution pipes, while the pre-disperser 27 shown in the left-hand part of Figure 2 is more appropriate for short distribution pipes. r? The water throttling holes 26 can be provided with the aid of a network that replaces the control surfaces of the pre-dispersers 27 and 28 respectively, either fully or partially. The outlet holes 23 in the distribution pipe 22 can also be formed with the help of a network. In the case of certain applications it is beneficial that the distribution pipe 22 forms an extension direct from connection pipe 24.

Although the described and illustrated embodiment is related to the supply of water saturated with air to a flotation tank in a water purification plant, it will be understood that the concept of the invention can also be applied to other containers of liquid and other gases and liquids.

Claims (4)

R E I V I N D I C A C I O N E S:

1. A liquid container (1) including an inlet (2) of liquid and a means (21) placed in the vicinity of the inlet to supply the liquid saturated with pressurized gas to the liquid supplied through the inlet, characterized in that the medium (21) of supply includes a housing (22, 24) which is connected to a gas supply pipe (25) saturated with gas, having at least one opening (26) that is discharged into the housing, the housing in turn, it is discarded towards the container (1) through at least one opening (23).

2. A liquid container according to claim 1, characterized in that the container is a flotation tank (1) in a water purification plant.

3. A liquid container according to claim 1 or claim 2, characterized in that the housing is constructed with an elongated dispensing means (22, 24). A liquid container according to claim 3, characterized in that the supply line (25) is connected to the distributor means (22) between the ends thereof.