RU1837754C - Horizontal settling tank - Google Patents

Description

FIELD OF THE INVENTION This invention relates to devices for fractioning wastewater and can be used in agriculture and municipal services, as well as in chemical, food and other industries.

Figure 1 schematically shows a cross section of a horizontal sedimentation tank; figure 2 is a section aa in figure 1.

The horizontal settling tank 1 contains a housing 2, in the walls of which openings 3 are made. In each opening 3 there is a filter grate 4.

The sump 1 is equipped with a filter element 5. The filter element 5 is made in the form of a closed perforated belt conveyor 6, mounted on the leading 7 and tension 8 ba aban. Belt conveyor 6 is installed in a box-like casing 9, with its open side facing the walls

casing 2. The tension drum 8 is perforated and located below the bottom 10 of the sump 1, and the bottom 10 is made with a slope towards the openings 3.

The bottom 11 of the casing 9 is made with a slope away from the wall of the casing 2 of the sump 1 to the tray 12, and the bottom 13 of the tray 12 is made adjacent to the bottom 11 of the casing 9 ..

One branch of the conveyor belt 6 is adjacent to the grate 4 and the walls of the casing 2 of the sump 1, and the second is located with a gap with the walls and the bottom 11 of the casing 9. Between them, the branches of the conveyor belt 6 form a cavity 14 for collecting the liquid fraction. Cantilever 14 has longitudinal beams 15 for supporting the conveyor 6 in an upright position. The beams 15 are mounted on the frame 16. On the frame 16, the driving 7 and tension 8 drums are also installed.

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Pressure pipelines 17 and 18 are used to feed the initial slurry. Pipeline 17 is connected to nozzles 19 for supplying slurry from below, and pipe 18 is connected to nozzles 20 for supplying slurry from above.

On the beams 15, gaskets 21. are made of elastic material to prevent the destruction of the conveyor 6.

The sump 1 is provided with a canopy 22 (the canopy frame is shown on the canopies). The housing 2 of the sump 1, in the manufacture of it from the metal, contains insulation 23. There are platforms 24 for servicing the sump 1 and the filter elements 5. The belt filter elements 5 and the platforms 24 have a canopy 25 (the canopy frame is shown in the drawings) adjacent to the canopy 22 of the sump .

Horizontal sedimentation tank works as follows.

Through the pressure pipe 17 and nozzles 19, the initial suspension is fed into the sump 1 and lowered to the bottom 10. The suspension from the axis of the sump 1 moves to the side walls where the drainage filter grates 4 are installed. At this time, filtering starts through the grate 4 and the conveyor belt 6 branch. adjacent to the grill 4 and the walls of the housing 2.

The liquid fraction enters the cavity 14 and through the perforated drum 8 is again filtered through the inner side of the conveyor belt 6.

As the sump 1 is filled, filtering takes place through the solid fraction and conveyor 6, which improves the quality of the liquid fraction.

After the formation of a natural solid layer on the bottom 10 of sedimentation tank 1 from the solid fraction, the initial suspension begins to be fed into the sedimentation tank through line 18 with nozzles 20. As the suspension level in the sedimentation tank increases, filtration occurs through a clean upstream section of conveyor 6. To improve separation efficiency, briefly turn on the drive (on drawings) drum 7. When the conveyor 6 moves, its regeneration process takes place (removal of the smallest particles of the solid fraction).

The invention improves the quality of separation by trapping fine particles by filter elements and reduces operating costs by self-cleaning the filter surface.

The proposed technical solution in comparison with the known technical solutions has new properties.

1, The installation of a closed perforated belt conveyor in the openings of the sump vertically allows you to periodically turn on the drive drive

drum to move the working section of the conveyor without replacing the filter element.

2. Installation of one branch of the conveyor belt close to the filtering

the grid and the walls of the sump housing allows you to create an underlayer on the filter grate of solid inclusions that act as a filter, and therefore it is more efficient to use filtering

5 elements.

3. Performing the perforated tension drum and installing it below the bottom of the sump body allows the liquid fraction filtered through the working section of the conveyor to the cavity formed by the branches of the conveyor belt, is again filtered through the inner side of the conveyor belt, which allows simultaneous re-generation of the perforated conveyor belt without using additional devices.

Claims (2)

1. A horizontal storage sump containing a canopy with openings made in the side walls of the casing, each of which has a filter grate and a box-shaped casing adjacent to it with its open side, the lower end of which is located below the bottom of the casing made with a slope towards the aperture, connected to the aperture and adjacent to the outlet tray, a filter element installed in the casing, a pipe for supplying the initial suspension, characterized in that, in order to improve the quality of separation, and kzhe reducing operating costs, the filter element is in the form 5 closed perforated belt conveyor mounted on the drive and tension drum with a gap relative to the side walls of the casing and adjacent one of its branches to the filter grid and the walls of the housing of the sump with the formation of a cavity for collecting liquid fraction between the branches of the conveyor, while the lead drum is made perforated and located below 5 bottoms of the sump body, and the tension drum is higher than the upper edge of its walls. 2. A storage sump according to claim 1, characterized in that the bottom of the outlet tray adjoins the lower end of the casing, which is sloped towards the tray, / J // i 1 19 R , Y / L //////) //////) (/ ////////////// 8tf 1837754 Aa 19 R , /) (/ //////// -ABOUT