PL248985B1 - Separator with overflow for separating solid contaminants in a liquid stream - Google Patents

Abstract

A separator with an overflow for separating solid impurities in a liquid stream, placed in a retention tank, having a body (1) for collecting separated impurities with an opening (3) in the cover (2) with a floating ball (18) which, during pumping of the liquid, closes the inlet opening (3) in the cover (2) and two openings (7 and 8) equipped with straining units (9 and 10) covered with non-return flaps (11 and 12) is characterized in that the body (1) of the separator is combined with an overflow chamber (4), which has a cover (5) with an overflow opening (6) which, in the event of a sudden inflow of liquid to the pumping station, serves to discharge its excess directly to the retention tank.

Description

Description of the invention

The invention concerns a separator with an overflow for separating solid contaminants contained in liquid streams, particularly municipal and industrial wastewater, water discharged from drainage systems, and sewage treatment plants. The separator is located, among other places, in a pumping station.

Standard design solutions for pumping stations used for liquids containing solid contaminants use separation systems to separate contaminants from the liquid stream flowing through the pump and through the pump suction port to the pumping station's retention tank.

The separator body design presented in the granted invention patent PL232472 is known. A stream of liquid containing solid contaminants flows through the separator, especially municipal and industrial wastewater or water discharged from drainage systems and drainage systems.

The separator body contains overflow openings equipped with strainers covered with flexible check valves, which are designed to retain contaminants inside the separator. The contaminant-free liquid stream is directed by a pump to the retention tank.

A disadvantage of the conventional separator design is the limited volume of liquid flowing through the pumping station, which is caused by flow restriction due to free passage restrictions within the pump. This causes sewage to accumulate in the separator and in the inlet pipeline to the pumping station, particularly during periods of sudden inflow of sewage from the catchment area.

The separator body design presented in patent application P.423519 is known. The separator of solid contaminants contained in the liquid stream is equipped with two additional pipes which, during the gravity flow of liquid to the pumping station, allow the liquid stream to flow directly into the retention tank.

When pumping liquids, the pressure generated by the pump causes the balls placed inside the pipes mounted outside the separator to move, closing the overflow to the retention tank, bypassing the pumps.

The disadvantage of the known separator design is its complicated construction, requiring each time an individual selection of the diameters of the overflow pipes, depending on the pumps used.

There are known solutions that enable increasing the volume of liquid flow through pumping stations, which direct the flow flowing from the separator directly to the retention tank by using overflow check valves placed between the separator and the pump.

The disadvantage of these solutions is the limited space for installing the check valves and the sensitivity of the moving elements of the check valves to damage caused by the dynamic impacts of the liquid stream generated by the pump during pumping.

The separator with an overflow, according to the invention, is designed for installation in a retention tank and serves to separate solid contaminants contained in a liquid stream. The separator with an overflow has a body closed by a cover with an inlet opening, inside which a floating ball is located, and two straining units covered by non-return flaps. The separator body is integrated with an overflow chamber, which has a cover with an opening and a swinging non-return flap. In the event of a backflow during a sudden inflow of liquid into the separator, excess liquid flows through the opening in the overflow chamber cover directly into the retention tank, bypassing the pumps. When pumping liquid from the retention tank, the swinging non-return flap acts as a check valve, closing the opening in the overflow chamber cover and preventing liquid flow into the retention tank.

The separator with an overflow according to the invention thus enables an increase in the volume of the liquid stream flowing through the device and thus increases the efficiency of the entire pumping station, while maintaining the principle of separation of solid contaminants contained in the pumped liquid.

The subject of the invention is shown in an example embodiment in the drawing, in which Fig. 1 shows the separator in a perspective view, Fig. 2 shows the separator with an overflow during filling the retention tank of the pumping station and Fig. 3 shows the separator with an overflow during pumping the liquid.

The separator with an overflow is designed for installation in a retention tank and serves to separate solid contaminants contained in liquid streams. It has a separator body (1), which serves as a reservoir for collecting the separated contaminants. Inside the separator body (1), a floating ball (18) is located. This ball closes the inlet opening (3) in the cover (2) of the separator body (1) during pumping, acting as a ball check valve. An overflow chamber (4), covered by a cover (5), is connected to the body (1). This chamber has an overflow opening (6) that, in the event of a sudden inflow of liquid into the pumping station, serves to drain excess liquid directly into the retention tank. Contaminated liquid fed to the pumping station flows by gravity into the separator through the opening (3) in the cover (2). The body (1) has two openings: an upper opening (7) and a lower opening (8), each equipped with straining units (9) and (10), covered by check valves (11) and (12). The liquid, purified by the straining units, flows through the upper opening (7) and lower opening (8) into the overflow chamber (4), and then through the discharge port (14) via the pump to the pumping station's retention tank. In the event of a sudden inflow of liquid into the separator body, a backflow occurs inside the device, slowing the outflow to the retention tank, caused by flow throttling through the pump channels. In such cases, the opening (6) located in the cover (5) of the overflow chamber (4) allows the excess liquid to flow freely directly into the retention tank, thereby increasing the pumping station's capacity. During pumping, after the pump is turned on, the liquid drawn from the retention tank through the outlet port (14) is forced into the overflow chamber (4) and then through the upper opening (7) and lower opening (8) into the separator body (1). To prevent liquid from flowing into the retention tank during pumping through the opening (6) in the cover (5), a check valve (13) is installed inside the overflow chamber (4) to seal the opening (6). This allows the pumped liquid to flow through the interior of the separator body (1), flushing out previously separated contaminants, and then through the outlet port (16) to the transfer pipeline. Flanges (15) and (17) are used to secure the separator inside the pumping station's retention tank.

List of markings

- body,

- cover,

- hole,

- overflow chamber,

- cover,

- hole,

- top hole,

- bottom hole,

- straining unit,

- straining unit,

- check valve,

- check valve,

- check valve,

- drain connector,

- collar,

- drain connector,

- collar,

- bullet.

Claims (2)

Patent claims 1. A separator with an overflow intended for installation in a retention tank for separating solid contaminants contained in a liquid stream, having a body closed with a cover with an inlet opening, inside which there is a floating ball and two straining units covered with non-return flaps, characterized in that the body (1) of the separator is combined with an overflow chamber (4), which has a cover (5) with an opening (6) and a swinging non-return flap (13). 2. A separator with an overflow according to claim 1, characterized in that a non-return flap (13) is mounted inside the overflow chamber (4) which closes the opening (6) in the cover (5) during pumping of liquid from the retention tank.