RU107149U1 - SILT WATER FOR INSTALLING BIOLOGICAL SEWAGE TREATMENT - Google Patents

Abstract

 1. A sump for a biological wastewater treatment plant, comprising a shell in the form of a shell with open upper and lower bases, characterized in that the housing has the shape of a truncated half cone and consists of interconnected bent sheet material and a sheet in the form of a trapezoid truncating the shell perpendicular to the bases . ! 2. The sump according to claim 1, characterized in that the housing is made of a polymeric material. ! 3. The sump according to claim 1, characterized in that polypropylene is used as the polymeric material.

Description

The inventive utility model relates to structural elements of compact installations for biological wastewater treatment of separate industrial and civil buildings.

From the prior art, a sump for biological treatment plants is known, comprising a housing with inclined walls with a damper pipe and a process pipe fixed to them. Moreover, the case is made in the form of a box-shaped shell in the form of a rectangular truncated pyramid with open larger and smaller bases .. The case is made of a polymeric material: polypropylene, polyethylene or other similar materials. (patent RU 54936 U1, C02F 3/06, publ. 07.27.2006).

The disadvantage of this design is the complex configuration of the housing, creating inconvenience when installing it in compact installations for wastewater treatment, insufficient rigidity, reliability and tightness of the housing.

A pyramid sump of a domestic wastewater treatment plant is known, comprising a body in the form of a truncated inverted pyramid with open upper and lower bases, to one of the sides of which a baffle is attached at the top with an reinforcing rib located on its upper edge and mounted with a grease trap. On one side of the pyramid, in its lower part, a cutter is placed. The pyramidal sump is made of polymer materials. (patent RU 96116 U1, C02F 3/06, publ. 07.20.2010)

However, the disadvantage of this sump is that the casing is in the form of a truncated pyramid, which worsens its installation, negatively affects the reliability, rigidity of the casing and the quality of its work.

The closest analogue, prototype, of the claimed utility model is a sump for biological wastewater treatment, containing a shell in the form of a shell in the form of a truncated pyramid with open larger and smaller bases, the edges of two adjacent walls of the housing from the side of the large base of the truncated pyramid protrude beyond the edges of the other two adjacent walls, and the edges of the protruding edges are located at the same level relative to the smaller base of the pyramid, and the edges of two other adjacent sides of the walls of the housing are one m level relative to the smaller base of the pyramid. The case is made of a polymeric material: polyethylene, polypropylene or vinyl plastic. (patent RU No. 78185, C02F 3/06, publ. November 20, 2008)

However, the implementation of the body in the form of a pyramid has several disadvantages. The housing has insufficient rigidity, reliability, tightness, because its design includes four welds connecting inclined polymer plates into a pyramidal shell. When fixing the pyramid on the wall of the installation’s tank, inconvenience arises during installation, and during operation, zones of fluid stagnation in the secondary chamber are formed.

The inventive utility model solves the problem of creating a sump for a compact installation of biological wastewater treatment, which has increased efficiency in operation, ease of installation.

The technical result, manifested by using the proposed sump, is to increase the rigidity, reliability and tightness of the structure, to increase the ease of installation, to improve the quality of wastewater treatment.

The proposed sump for the installation of biological wastewater treatment, as well as the prototype, contains a casing in the form of a shell with open upper and lower bases. Its distinctive feature is that the body has the shape of a truncated half-cone and consists of interconnected bent sheet material and a sheet in the form of a trapezoid, truncating the shell perpendicular to the bases.

Moreover, the housing is made of a polymer sheet material, namely, polypropylene.

The proposed shape of the housing of the sump, increases the reliability, tightness and rigidity of its design in comparison with analogues having a casing in the form of pyramids. The truncated half-cone design has only two welds, and not four, like a pyramid. The distribution of pressure on the half cone during installation is more even, the area of water purification in the secondary chamber of the installation (aeration tank) is also increased, where a settling tank is installed, the quality of particle deposition under the influence of gravity is improved.

A sheet in the shape of a trapezoid truncating the shell perpendicular to the bases and giving the body the shape of a truncated half-cone provides the convenience of mounting the body on the wall of the installation tank. Also, this design provides a snug fit of the housing to the wall, which avoids the appearance of zones of fluid stagnation in the secondary chamber.

The essence of the claimed utility model is illustrated by drawings:

In Fig 1 shows the housing of the sump - front view;

Figure 2 shows the housing of the sump - side view;

Figure 3 shows the housing of the sump - top view.

The sump body for the biological wastewater treatment plant is designed as a shell with open upper and lower bases and has a truncated part perpendicular to the bases, which forms its shape - a truncated half cone. In the working position of the sump, a larger base is located at the top, a smaller one at the bottom. The case consists of two polypropylene sheets: a curved reamer of a half-cone 1 with a thickness of 3 mm and sheet 2 in the form of a trapezoid with a thickness of 5 mm. The sheet in the form of a scan of the half cone 1 is bent in the conductor and connected by welding with the sheet 2 in the form of a trapezoid with the formation of two welds. The truncated perpendicular part - sheet 2 in the form of a trapezoid of a half-cone, is necessary for the convenience of reliable fixation of the sump body to the wall of the installation tank, ensuring its tight fit to the wall of the body.

In general, the sump in the biological wastewater treatment plant is designed to separate purified water from activated sludge particles and to final clarify the liquid by settling. A grease trap (not shown) is attached to the outside of the housing of the sump, the pipe of which through the hole in the half cone is directed inside the sump. A damper (not shown) is attached inside the half-cone, there is a hole for connecting the outlet pipe for treated wastewater. An additional filter (not shown) is attached to the outlet pipe for purified water inside the semi-cone. A pipe (not shown) is welded to the side wall of the sump to connect a wastewater pump. The sump is located in the so-called secondary chamber (aeration tank) of a compact plant for biological wastewater treatment. The shape of the case in the form of a truncated half-cone increases the area of water purification in the secondary chamber.

The principle of operation of wastewater treatment in the sump is as follows. Semi-purified waste water is pumped by airlift into a sump. Here, under the influence of gravitational forces, suspended particles and activated sludge particles are deposited on the bottom of the installation. As you know, the deposition of particles under the action of gravity proceeds in the best way in a tank having the shape of a cone. The housing of the sump does not have a blower for an additional filter, which allows the process of particle deposition under the influence of gravity to proceed more quickly and efficiently. The upper layer of water, which includes activated sludge particles and oily substances, is removed from the sump by a grease trap for re-cleaning. Purified water, as the level rises by gravity, is discharged through the outlet pipe from the unit.

Using the proposed utility model provides the convenience of installing the sump in the capacity of the biological wastewater treatment plant, increasing the efficiency of the installation.

Claims (3)

1. The sump for the installation of biological wastewater treatment, containing a shell in the form of a shell with open upper and lower bases, characterized in that the housing has the shape of a truncated half cone and consists of interconnected bent sheet material and a sheet in the form of a trapezoid truncating the shell perpendicular to the bases . 2. The sump according to claim 1, characterized in that the housing is made of a polymeric material. 3. The sump according to claim 1, characterized in that polypropylene is used as the polymeric material.