ITMI950437A1

ITMI950437A1 - Separation plant for liquids with a different specific weight, in particular water and oil mixtures.

Info

Publication number: ITMI950437A1
Application number: IT95MI000437A
Authority: IT
Inventors: Pierlodovico Biglia
Original assignee: Ecoplast S A S Di Biglia Pierl
Priority date: 1995-03-07
Filing date: 1995-03-07
Publication date: 1996-09-07
Also published as: IT1275870B1; ITMI950437A0

Abstract

A separation plant for liquids with a different specific weight, in particular water and oil mixtures, that allows such separation for a difference according to the density of the two liquids. The mixture passes through a long route in a tank that separates the two liquids: while oil floats on the surface, water remains on the bottom; the tank comprises two electric conductivity probes that record the minimum and maximum level of water separated on the bottom, and operate a liquid supply pump and a discharge valve for the depurated water (Figure 1).

Description

IMPIANTO DI SEPARAZIONE DI LIQUIDI DI PESO SPECIFICO DIVERSO, IN PARTICOLARE DI UNA MISCELA ACQUA-OLIO PLANT FOR SEPARATION OF LIQUIDS OF DIFFERENT SPECIFIC WEIGHT, IN PARTICULAR OF A WATER-OIL MIXTURE

DESCRIZIONE DESCRIPTION

Viene proposto un impianto di separazione di liquidi di peso specifico diverso, in particolare di una miscela acqua-olio. A plant for the separation of liquids of different specific gravity, in particular of a water-oil mixture, is proposed.

L’impianto di separazione di liquidi di peso specifico diverso, in particolare di una miscela acqua-olio,oggetto dell’invenzione realizza la separazione per differenza di densità dei due fluidi in una vasca atta a far percorre alla miscela un lungo percorso che facilita il galleggiamento dell’olio e raccoglie sul fondo l’acqua, caratterizzata dalla presenza di due sonde di conducibilità elettrica che attivano rispettivamente una pompa di alimento del fluido da trattare e una valvola di scarico dell’acqua depurata. The plant for separating liquids of different specific gravity, in particular of a water-oil mixture, object of the invention, carries out the separation by difference in density of the two fluids in a tank designed to make the mixture travel a long path which facilitates floating of the oil and collects the water on the bottom, characterized by the presence of two electrical conductivity probes which respectively activate a feed pump for the fluid to be treated and a purified water drain valve.

L’invenzione verrà spiegata in dettaglio nel seguito in una forma di realizzazione non limitativa. The invention will be explained in detail below in a non-limiting embodiment.

La Figura unica illustra una forma di realizzazione preferita dell’impianto proposto, in sezione parziale e vista prospettica. The single figure illustrates a preferred embodiment of the proposed system, in partial section and perspective view.

Osservando la Figura, il dispositivo illustrato 1 è realizzato con una vasca avente la parte inferiore a tronco di piramide a base quadrata e la parte superiore con pareti che proseguono verso l’alto a partire dalla base maggiore del detto tronco di piramide. Il fondo 1 A è fornito con una bocca di scarico dei fanghi 1B mentre la parte superiore è sostanzialmente aperta. Observing the Figure, the illustrated device 1 is made with a tank having the lower part in the shape of a truncated pyramid with a square base and the upper part with walls that continue upwards starting from the greater base of the said truncated pyramid. The bottom 1A is supplied with a sludge discharge mouth 1B while the top is substantially open.

Un tubo 2 collegato ad una pompa e ad un serbatoio non illustrati alimenta la miscela acqua-olio ottenuta da residui di officine o di lavorazioni meccaniche e scarica la miscela sul piano 3 che prosegue con uno scivolo 3A inclinato verso il basso; la miscela scende fino a riempire la vasca al livello LIV. Al disotto del piano di livello del fluido da trattare è disposta una serie di fogli ondulati di plastica stampata 4 che creano una serie di labirinti a zig-zag i quali costringono alla separazione fisica per differenza di peso specifico dell’acqua dell’olio, l’acqua spostandosi verso il fondo del serbatoio 1. Nella parte anteriore superiore della vasca è previsto un piano di scorrimento dell’olio 5. Tale piano separa lo strato di olio galleggiante dall’acqua sottostante e inoltre presenta superiormente un percorso a zig-gaz dell’olio attraverso un canale formato dalle paratie 9, 10, 11, collegate fra loro tramite le astine 12, che sono saldate alla carcassa in modo da sospendere le dette paratie di 1-2 centimetri al di sopra del piano 5. In tal modo si ottiene un livello di olio sempre al di sopra del piano 5 sopra citato. Col legata al piano 5 è prevista una canal ina 6 fornita di un bordo seghettato dagli intagli 7 che servono a separare l ’olio che arriva contro la detta parete 6 della canal ina e esso viene scaricato nello spazio 7A per poi raggiungere il tubo di scarico 8 che convoglia l ’olio ad un serbatoio di raccolta (non rappresentato). Tale scarico avviene spontaneamente senza necessità di una pompa o altro dispositivo meccanico. A pipe 2 connected to a pump and a tank not illustrated feeds the water-oil mixture obtained from workshop or mechanical processing residues and discharges the mixture onto the plane 3 which continues with a chute 3A inclined downwards; the mixture flows down to fill the tank to the LEV level. Below the level plane of the fluid to be treated there is a series of corrugated sheets of molded plastic 4 which create a series of zig-zag labyrinths which force physical separation due to the difference in specific weight of the oil water. water moving towards the bottom of the tank 1. In the upper front part of the tank there is an oil sliding surface 5. This surface separates the floating oil layer from the underlying water and also has a zig-gaz path of the upper part of the tank. oil through a channel formed by the bulkheads 9, 10, 11, connected to each other by means of the rods 12, which are welded to the casing so as to suspend said bulkheads 1-2 centimeters above the plane 5. In this way it is possible to obtains an oil level always above the level 5 mentioned above. Connected to the plane 5 there is a channel 6 provided with a serrated edge by the notches 7 which serve to separate the oil that arrives against the said wall 6 of the channel and it is discharged into the space 7A to then reach the discharge pipe. 8 which conveys the oil to a collection tank (not shown). This discharge occurs spontaneously without the need for a pump or other mechanical device.

Nella parte inferiore della vasca ed appena sopra il fondo 1A è previsto un imbuto conico rovesciato 13 che serve per la raccolta e lo scarico dell ’acqua depositati in basso dopo il suo deposito attraverso i settori a zig-zag sopra citati e scarica l ’acqua attraverso il tubo 14 che continua all ’esterno o nella elettropompa/valvola 15 che si apre periodicamente e scarica acqua quasi pulita nel recipiente 16 esterno alla macchina. In the lower part of the tank and just above the bottom 1A there is an inverted conical funnel 13 which is used for the collection and discharge of the water deposited at the bottom after its deposit through the aforementioned zig-zag sectors and discharges the water. through the tube 14 which continues outside or into the electric pump / valve 15 which opens periodically and discharges almost clean water into the container 16 outside the machine.

Il livello minimo e massimo dell ’acqua raccolta sul fondo della vasca viene regolato da due sonde di conducibilità elettrica 18, 19 disposte in modo da avere differenti livelli Li e L2 delle loro estremità. La loro funzione è la seguente: The minimum and maximum level of the water collected at the bottom of the tank is regulated by two electrical conductivity probes 18, 19 arranged so as to have different levels Li and L2 of their ends. Their function is as follows:

Quando il livello dell ’acqua arriva al livello L2 (livello massimo) la sonda 18 (la più elevata) conduce la corrente fra l ’acqua e la carcassa e blocca tramite un relè l ’alimentazione del liquido da trattare proveniente dalla tubazione 2. When the water level reaches level L2 (maximum level), probe 18 (the highest) conducts the current between the water and the casing and blocks the supply of the liquid to be treated from pipe 2 via a relay.

Quando il livello dell ’acqua scende al livello della punta sensibile della sonda 19, tarata di eversamente dalla sonda 18, viene fermato lo scarico della valvola 15 e contemporaneamente viene attivata la pompa esterna di alimentazione dell’olio. In tal modo il ciclo di riempimento prosegue e viene sempre mantenuto un livello dell’acqua compreso fra i due valori L1 e L2. When the water level drops to the level of the sensitive tip of the probe 19, calibrated inversely by the probe 18, the discharge of the valve 15 is stopped and at the same time the external oil supply pump is activated. In this way the filling cycle continues and a water level between the two values L1 and L2 is always maintained.

La produzione oraria di liquido trattato è di 180 litri/ora. The hourly production of treated liquid is 180 liters / hour.

Mentre l’invenzione è stata illustrata e descritta in particolare con riferimento alla sua forma di realizzazione preferita, sarà chiaro alle persone esperte della tecnica che varie modifiche nella sua forma e nei suoi dettagli possono essere realizzati senza allontanarsi dallo scopo dell’invenzione che viene definito nelle rivendicazioni seguenti. While the invention has been illustrated and described in particular with reference to its preferred embodiment, it will be clear to those skilled in the art that various modifications in its form and details can be made without departing from the scope of the invention which is defined in the following claims.

Claims

CLAIMS 1. A system for the separation of liquids of different specific gravity, in particular of a water-oil mixture, which achieves this separation by the difference in density of the two fluids in a tank designed to make the mixture travel a long path that facilitates the floating of the oil and collects the water on the bottom, characterized by the presence of two electrical conductivity probes which activate respectively a pump for feeding the fluid to be treated and a drain valve for the purified water.

2. The system of claim 1, in which in particular a tank (1) is provided having the lower part in the form of a truncated pyramid with a square base and the bottom (1 A) is closed, while the upper part is partially open, and is equipped with a tap or lower door for sludge discharge (1B), a pipe (2) feeds the water-oil mixture, discharges it onto the surface (3) which continues with a slide (3A) downwards and the oil goes down to to fill the tank to level (LI V); further characterized by the fact that below the level plane of the fluid to be treated (LIV) there is a series of molded plastic elements (4) which create a series of zig-zag labyrinths, which force physical separation due to the difference in specific weight of the water moving towards the bottom of the tank; further characterized by the fact that in the upper front part of the tank there is an oil flow surface (5) which separates the layer of oil floating on the underlying water and also a zig-gaz path of the oil is obtained through a channel formed by the bulkheads (9, 10, 11) connected to each other by means of the rods (12) which support the said walls 1-2 centimeters above the surface (5), to obtain a decantation of the oil thus obtaining a oil level always above the plane (5) mentioned above; furthermore connected to the surface (5) there is a channel (6) provided with a serrated edge from the notches (7) which separate the oil that arrives against the said wall of the channel and it is discharged into the space (7A) and then reaches the drain pipe (8) which conveys the oil to a collection tank.

3. The system of claims 1 and 2, further characterized in that in the lower part of the tank and just above the bottom (1 A) there is an inverted conical funnel (13) which is used to collect and drain the water deposited at the bottom after its passage through the zig-zag sectors (4) and discharges the water through the pipe (14) which continues outside into the electric pump / valve (15) which opens periodically and discharges water into the container ( 16) external.

4. The system of claims 1, 2 and 3, further characterized in that the minimum and maximum level of the water (L1, L2) collected on the bottom of the tank is regulated by two electrical conductivity probes (18, 19) arranged in order to have different levels (L1 and L2) of their ends, the operation of which is as follows: - when the water level reaches level (L2) (maximum level) the probe (18) conducts the current between the water and the casing and blocks the supply of fluid coming from the pipe (2); - when the water level drops to the level of the sensitive tip of the probe (19), calibrated differently from the probe (18), the discharge of the valve (15) is blocked and at the same time the external oil supply pump is activated, in this way mode the filling cycle continues and a water level between the two maximum and minimum values (L2 and L1) is always maintained.