ES1285519U - Hydrodynamic separator. - Google Patents

Abstract

Hydrodynamic separator, vortex type, consisting of a cylindrical well (12) to which the rainwater collected in a collector (1) arrives through a pipe (3), said well (12) comprising - a sand chamber (5 ) located in the lower part, separated by a frustopyramidal or frustoconical plane (4) from the entrance of the pipe (3); - a hood (6), located above the entrance of the pipe (3) through which the suspended matter of lower density rises, which accumulates in the upper part of a central chamber (14), located above said bell (6); - a perimeter chamber (7) as a deflector, formed around the central hood (6), which has a series of passage ducts (8) that communicate with an upper central chamber (14); - an upper chamber (14), formed at the upper outlet of the central bell (6) in which the suspended matter of lower density accumulates; - an annular chamber (9), above the deflector (7), through which the circulating flow of treated water reaches the surface, which pours into a perimeter channel (15) that leads to the outlet (10) of the separator; in which well (12), the inlet pipe to the equipment (3) has an elbow with an angle greater than 90º, so that it hits tangentially inside the well (12) producing a vortex effect that causes a large part of the particles that contains the water to settle and collect in a lower compartment (5) or sand chamber located in the lower part of said well (12).

Description

DESCRIPTION

hydrodynamic separator

field of invention

The invention falls within the industrial sector of liquid separation, not provided for elsewhere, for example, in devices for separating or removing fatty or oily substances or similar floating material from water or wastewater. And also in the separation of solid particles in suspension of liquids by sedimentation.

The object of the present invention is a hydrodynamic separator, also known in jargon as a hydrocyclone, which is a device that allows, among other things, to treat rainwater pollution. This separator has been developed for the treatment of the entire flow of rainwater circulating through a collector, increasing the treatment capacity and efficiency of the separators known up to now, by implementing new treatment phases.

Background of the invention

The materials to be separated by this type of device are usually solids such as sand, organic matter and other fine particles, or liquids that have a lower density than the main liquid flow, which can be oils and hydrocarbons, or crude solids, which can have a neutral buoyancy, such as garbage that is deposited in the street, such as bottles, plastic packages, cigarette butts, etc.

Hydrodynamic treatment devices, also known as vortex separators, have been well known for years (US3277926). These devices were created to facilitate the separation of sedimentable material, that is, material contained in a liquid that tends to settle due to gravity. Later, in WO0062888, this same principle is used to also separate floating materials in said liquid, placing the elements of the hydrodynamic separator in opposite orientation, so that the liquid flow acts by concentrating the floating solid matter, which rises in the container towards a central upper region where it can be diverted from the normal flow of liquid through the container and collected for disposal.

The efficiency of a hydrodynamic separator can be expressed quantitatively in terms of retention efficiency, on the one hand, of settleable particles whose density is greater than that of water, and on the other hand, of floating elements or whose density is less than that of water, all it inside the separator. Known hydrodynamic separators are devices that internally hide a great structural complexity, in general with the aim of optimizing their performance, although this is not an easy task, since small changes in their geometry can have important effects on retention efficiency.

The present invention tries to solve the aforementioned problems existing in the prior art and to obtain a separator with a high degree of efficiency.

Description of the invention

In order to achieve the proposed objectives, mentioned in the previous section, the invention proposes a hydrodynamic separator, which has the characteristics of claim 1.

The hydrodynamic separator, of the vortex type, object of the invention comprises a cylindrical well to which the rainwater collected in an inlet collector arrives, which, after passing through a thick grid, passes through a pipe with said well, which is compartmentalized into the following chambers:

- A retention chamber for sedimentable particles, such as sand, located in its lower part, which is separated by a frustopyramidal plane, located below the entrance of the liquid inlet pipe in the separator.

- Above the entrance area of said pipe, this well is closed by a bell through whose interior the lower-density suspended matter rises, made up of fats, hydrocarbons and floats, which accumulate in the upper part of a central third chamber located above this.

- Around the central hood, a perimeter chamber is formed as a deflector, which has a series of passages that communicate with the aforementioned upper central chamber to prevent the formation of dead zones of gas accumulation.

- As we have already indicated, above the central bell an upper chamber is formed in which the lower density matter accumulates, consisting of fats, hydrocarbons and floaters.

- Around said upper chamber an annular chamber connected to said deflector, in which the treated water accumulates, which is channeled to come to the surface and pour into a perimeter channel that leads to the outlet of the separator.

According to an important characteristic of the invention, the inlet pipe to the equipment has an elbow with an angle slightly greater than 90°, so that it hits the inner cylinder of the well tangentially, producing a vortex effect that causes a large part of the particles contained in the water settle and are collected in a lower compartment or sand chamber located in the lower part of said well.

Description of the figures

To complement the description that is being made and in order to facilitate the understanding of the characteristics of the invention, a set of drawings is attached to this specification in which, for illustrative and non-limiting purposes, the following has been represented:

Figure 1 shows a section along a vertical plane of a separator made according to the invention.

Figure 2 corresponds to a plan view of the previous one.

Figure 3 is a plan detail of the well (12) to show the tangential entrance of the conduit (3).

Preferred embodiment of the invention

As can be seen in the referenced figures, the parts that constitute it are:

1) Inlet manifold

2) Thickness grid

3) Elbow pipe tangential to the well

4) Plate for dumping sediment into the sand chamber

5) Sand Chamber

6) Central bell that conducts fats, hydrocarbons and floats to the upper cylinder (14)

7) Baffle

8) Conduit for the evacuation of fats and intermediate floats to the upper chamber (14) 9) Weir

10) Duct or outlet channel

11) Spillway

12) Well

13) Separator body

14) Upper Chamber

The flow of the rainwater collector is incorporated into the equipment through an inlet collector (1) that has a grate (2) that prevents the entry of thick elements into the separator itself (13), avoiding possible blockages due to the passage into its interior of material of a larger size than can pass through its ducts. Said collector (1) has a front spillway (11) for flows circulating through the collector greater than 80% of its depth.

According to one of the characteristics of the invention, the liquids enter the equipment through a pipe (3), which is equipped with an elbow with an angle greater than 90°, which affects tangentially the inner cylinder of the well (12) in which the device is housed, so that said input produces a vortex effect that causes a large part of the particles contained in the water to settle and collect in the lower compartment (5) or sand chamber, which is separated by a frustopyramidal or frustoconical plane (4) of the well (12), in such a way that it prevents the material, once settled, from going back up into said well (12). The periodic removal of the matter retained in this chamber (5) will be carried out by means of suction by a cleaning truck.

The lower-density suspended matter, made up of fats, hydrocarbons and floaters, forced by the vortex effect, rises through a bell-like central conduit (6), which closes the well (12), and accumulates in the upper part of the a central chamber (14), located above the hood (6), from where they are periodically removed by suction by a cleaning truck.

Suspended matter that is not introduced through the bell or central duct (6) will be projected, due to centrifugal force, towards the wall of the well (12), decanting a part of it towards the sand chamber (5) and another, towards an upper perimeter chamber (7), which forms a deflector, which has a series of passages (8) that communicate with the upper central chamber (14). The arrangement of these passages (8) will prevent the formation of dead zones that could accumulate gases produced by the entrainment of air caused by the flow of rainwater and/or by the digestion gases of the settled matter in the sand chamber. The deflector (7) communicates perimeter with an annular chamber (9) through which the circulating flow of already treated water is channeled to come to the surface and pour into the perimeter channel (15) through the weir that leads to the outlet. (10) of the separator.

The equipment (13) can be assembled in chambers or wells made on site or in prefabricated elements that are supplied to the customer with and without large floating protection grids (2). In the embodiment shown, the equipment has been mounted on a concrete work made for this purpose. The various components that make it up can be supplied as auxiliary elements to be placed, or they can be part of a prefabricated kit.

Once the nature of the invention has been sufficiently described, as well as a preferred embodiment, it is stated for the appropriate purposes that the materials, shape, size and arrangement of the elements described may be modified, as long as this does not imply an alteration of the essential characteristics of the invention that are claimed below:

Claims (3)

1. - Hydrodynamic separator, vortex type, consisting of a cylindrical well (12) to which the rainwater collected in a collector (1) arrives through a pipe (3), comprising said well (12) - a sand chamber (5) located in the lower part, separated by a frustopyramidal or frustoconical plane (4) from the entrance of the pipe (3); - a hood (6), located above the entrance of the pipe (3) through which the suspended matter of lower density rises, which accumulates in the upper part of a central chamber (14), located above said bell (6); - a perimeter chamber (7) as a deflector, formed around the central hood (6), which has a series of passage ducts (8) that communicate with an upper central chamber (14); - an upper chamber (14), formed at the upper outlet of the central bell (6) in which the suspended matter of lower density accumulates; - an annular chamber (9), above the deflector (7), through which the circulating flow of treated water reaches the surface, which pours into a perimeter channel (15) that leads to the outlet (10) of the separator; in whose well (12), the inlet pipe to the equipment (3) has an elbow with an angle greater than 90°, so that it hits tangentially inside the well (12) producing a vortex effect that makes a large part of the particles containing the water settle and are collected in a lower compartment (5) or sand chamber located in the lower part of said well (12). 2. - Hydrodynamic separator, according to claim 1, characterized in that the input manifold (1) has a grid (2) that prevents the entry of thick elements to the separator itself (13), avoiding possible clogging due to the passage to its interior of material of a larger size than can fit through its ducts. 3. - Hydrodynamic separator, according to claim 2, characterized in that the inlet collector (1) has a front spillway (11) for circulating flows greater than a certain depth, which discharges into a perimeter channel (15) in which the outlet (10) of the separator is located.