PL156252B1 - Desander - Google Patents

Description

RZECZPOSPOLITA PATENT DESCRIPTION 156 252 POLAND

Additional patent to patent no. - Filed: 87 11 03 (P. 268568)

Int. Cl. ⁵ C02F 3/000 'C02F 1/00

OFFICE

PATENT

RP

Priority - Application announced: 89 05 16

Patent description published: 1992 10 30

Creators of the invention: Ryszard Przybyłowicz, Lech Narbutt

The holder of the patent: Przedsiębiorstwo Eksportu Budownictwa "Instalexport", Warsaw (Poland)

Sandbox

The subject of the invention is a vertical flow sand trap designed to separate solid pollutants from raw sewage in the process of biological wastewater treatment.

A sand trap is known from the Polish patent specification No. 102 767. The sand trap is composed of a cylindrical vertical tank, the bottom wall of which is inclined at an angle towards the lowest point of the bottom. Inside the tank there is a system for separating impurities and sediments consisting of a pump tube and a suction nozzle, which is located above the bottom of the tank. In addition, inside the tank there are vertical partitions in which flow holes are made. The settling tank is also equipped with a floating dust suction system.

The sand trap according to the invention consists of a cylindrical vertical container with an inverted cone-shaped bottom, with a recess at the top, above which the dirt discharge conduit is suspended, and a compressed air supply pipe.

The essence of the invention is a sand trap with a central pipe for the inflow of raw sewage in the center of the container, while between this pipe and the container shell there is a ring dividing the cylindrical space of the container into two sections, internal and external. In the upper part of the ring there is a collecting trough with holes in the outer wall, while the inner rim of the trough wall is serrated, with the openings at a lower level than the chilled rim. Moreover, between the central pipe and the container shell, there are stabilizers located at an acute angle to the horizontal.

The subject matter of the invention is explained in an embodiment in the drawing which shows the sand trap in a vertical axial section.

The sand trap consists of a container having a vertical cylindrical jacket 1 and an inverted cone-shaped bottom 2 with a recess 3 in the top of the cone. Inside the container, in the cylindrical space, there is a central pipe 4 connected to the raw sewage inlet pipe 5. Inside the central pipe 4, above the cavity 3, hangs the dirt discharge pipe 6 and the compressed air inlet pipe 7. Between the central pipe 4 and the shell 1 of the container there is a ring 8 dividing the interior of the container into two sections

156 252 inside and outside. In the upper part of the ring 8 there is a collecting trough 9 having holes 10 in the outer wall, while the inner rim 11 of the trough wall is serrated for easier flow of treated sewage. The collecting trough is connected to the outflow of 12 treated sewage. Moreover, stabilizers 13 are placed between the central pipe 4 and the container shell 1.

Claims (3)

Patent claims 1. A sand trap consisting of a cylindrical container with an inverted cone-shaped bottom with a recess, above which the waste discharge pipe and a compressed air supply pipe are suspended, characterized in that the central pipe (4) for the sewage inlet is placed in the center of the container, and between the central pipe (4) and the shell (1) of the container is seated with a cylindrical ring (8) dividing the cylindrical space of the sand trap into two internal and external sections, on which ring (8) in the upper part is mounted the collecting trough (9) connected to the drain (12) the treated waste water, the trough having an outflow of different levels, higher in the inner wall and lower in the outer wall. 2. Settler according to claim The method according to claim 1, characterized in that between the central pipe (4) and the shell (1) of the container, stabilizers (13) are fixed at an acute angle to the horizontal. 3. Settler according to claim The method according to claim 1, characterized in that in the outer wall of the trough (9) there are outflow openings (10), while the rim of the inner wall has a cooling (11) for a more uniform flow of the treated sewage.