RU36403U1 - Sewage screener for the extraction of solids - Google Patents

Description

Wastewater processor for the extraction of solids

The utility model relates to the field of wastewater treatment and can be used in various types of sewerage systems to detain and remove mechanical impurities from wastewater.

A device is known for retaining and removing mechanical impurities from wastewater, comprising a housing placed on supports, a grate made in the form of a closed continuous circuit with catch hooks fixed to it and installed in the housing with the possibility of continuous displacement, a grate cleaning device made in the form of a brush of flexible rods connected to the rotation drive assembly (Utility Model No. 25745 description of cl. 7EOZR 5/14, bull. No. 29, publ. 20.10.02).

Also known is a device for trapping and removing mechanical impurities from wastewater, comprising a frame with a flat filter baffle mounted therein at an angle to the horizon and made of individual grate trapezoidal sections assembled on hairpins, a filter baffle cleaning system made in the form of a plate type conveyor, moving delayed impurities to the upper zone of the device and dumping them into a special container or onto a conveyor (Yakovlev S.V., Voronov Yu.V. Wastewater and wastewater treatment od / Textbook for high schools, M.: ASV.2002.704s.).

7 E 03 F 5/14

as disadvantages of the known device, you can specify the following:

1. In the known device, the filtering surface is formed by individual grid-irons of a trapezoidal section assembled on hairpins. The manufacture and installation of these grates are of great complexity.

2. The lintels between the grates formed by the studs inevitably become clogged with fibrous materials.

5. In the known device, the filter surface is cleaned of zadereyanny impurities produced by working plates (scrapers), the length of which corresponds to the width of the water supply channel. With a sufficiently large channel width, the efficiency of cleaning the filter surface from debris becomes insufficient, since a long plate cannot adapt to the profile of a wide filter partition, which, for many reasons, will not remain flat during operation. This will lead to clogging of certain sections of the filter surface, increase its hydraulic resistance and increase the difference in levels of wastewater before and after the device.

The utility model aims to address these shortcomings.

The purpose of the utility model is to increase the efficiency of wastewater treatment, expand the possibilities of extracting impurities of finer fractions and increase water flow with a constant channel cross-section, simplify the design and reduce its metal consumption.

This goal is achieved by the fact that the device for trapping and removing impurities from wastewater consists of: a frame (body) with a filter baffle installed in it, made of perforated, flat, corrosion-resistant steel sheet; cleaning systems of the filtering partition in the form of a plate-type conveyor that moves the impurities that are detained and settled on the filter surface to the upper zone of the device and dump them into a special container or onto a conveyor.

The use of a perforated flat steel sheet as a sieve (filter baffle), having slots with a width of 0.8 to 36 mm (optional) and mounted on a special frame, allows for the retention of impurities in a wide range of their sizes, as well as their effective removal (regeneration) with filter surface.

In FIG. 1 presents a schematic diagram of the proposed device, in FIG. 2-section along aa.

th size. To remove trapped impurities from the filtering partition, a special device is mounted on it. It consists of a frame supporting the upper 3 and lower 4 axles with two pairs of leading 5 and driven 6 sprockets mounted on them.

Traction chains 7 are tensioned on the upper and lower (right and left sides) sprockets, on which there are mounting plates 8 for installing horizontally located scrapers 9. The scrapers are equipped with brushes made of elastic rods, which improves the quality of cleaning the filter surface from impurities. The scrapers 9 are driven by an electric drive according to the signal of the water level sensor installed in the channel. The device is equipped with supports 10 mounted on the sides of the channel, an outlet pipe 11 and a receiving hopper 12 for collecting delayed impurities.

The device operates as follows.

A frame with a filter baffle is installed in the channel at an angle to the water horizon, blocking the flow. Wastewater is filtered through a sieve (septum), as a result of which impurities accumulate on its surface.

As they accumulate, the free area of the septum of the partition decreases, its hydraulic resistance increases, and there is water backwater in front of the device. Upon reaching the maximum permissible level of water back-up, a level sensor is triggered, by the signal of which the electric drive of the drive sprockets starts to work. As a result of rotation of the sprockets, the traction chains stretched over them move the scrapers along the surface of the filtering baffle plate at a design speed in the direction from bottom to top (from the channel to the receiving hopper). With this movement, the scrapers, which are tightly adjacent to the filtering surface, entrain impurities, thereby restoring the filtering ability of the septum. In the upper part of the device, impurities are scraped off by scrapers through the outlet pipe into the receiving hopper or onto the conveying device.

Claims (1)

A device for trapping and removing mechanical impurities from wastewater, containing a frame (body), with a filter baffle installed therein at an angle to the horizon, a filter baffle cleaning system made in the form of a plate-type conveyor that transfers the trapped impurities to the upper zone of the device and discharges them in a storage container, characterized in that the filtering partition is made of a flat perforated sheet of corrosion-resistant material having a gap of a given size.