RU2604499C1 - Filtering device installed in rain receiving well - Google Patents

Abstract

FIELD: processing and recycling of wastes.

SUBSTANCE: invention relates to wastewater treatment. Device comprises filtering (2) and settling (1) chambers, installed in rain receiving well and arranged one inside the other, in bottom part (5 and 4) of each of which central through hole (10 and 9) is located, as well as vertically oriented overflow pipe (11) with top open end section (12), installed inside said chambers and passing through said through holes. Settling chamber (1) is open from above and has solid side surface (3) and bottom part (4). Filtering chamber (2) is closed from above and has holes (6) for water passage in bottom part (5). Filtering chamber (2) is installed in settling chamber (1) with gap between side surfaces (7 and 3) of said chambers and their bottom parts (5 and 4). In lower part of the filtering chamber (2) filtering material (13) is placed. Overflow pipe (11) is installed so that its top open end section (12) is located in filtering chamber (2) above level of filtering material (13) with possibility of penetration into said end section of water, passing through filtering material (13). In side surface of filtering chamber (2) in area located nearby its bottom part (5) side openings (8) for water passage are located. Filtering chamber (2) is provided with annular baffle plate (16), made in form of truncated cone narrowing downwards, installed inside filtering chamber (2) with gap relative to its bottom part (5) near location zone of side holes (8) for passage of water with provision of deviation of jets of water falling on said annular baffle plate (16) from said side holes (8) in direction to bottom part (5) of filtering chamber (2).

EFFECT: higher efficiency of device operation is achieved.

1 cl, 1 dwg

Description

The invention relates to the field of wastewater treatment, in particular to a device for cleaning rainwater wastewater from pollution, installed in storm water wells.

For wastewater treatment, it is promising to use devices installed in storm water wells, with which primary wastewater treatment is carried out, in particular, from oil and oil pollution, which reduces the load on the treatment plant.

Known mounted in the sewer well filter device [RU 151523].

This device contains a filter element, including a water-tight housing, having gratings located above and below the water-permeable grates and filled with filter material. The filter element is mounted on a support ring fixed in the upper part of the well, overlapping the space between the side walls of the well and the housing of the filter element. The well is equipped with an inlet pipe for untreated drain located in its bottom, and an outlet pipe for cleaned drain located in its upper part. In this case, the filter element is installed in the well in such a way that the inlet pipe is located below the housing of the filter element, and the outlet pipe is located above the support ring.

The advantage of the device in question is that the effluent is cleaned when it passes through the filter material in the direction from the bottom up, while reducing the likelihood of clogging of the filter material by particles of dispersed contaminants.

However, the device in question is intended for installation in a well in which the flow of untreated water is organized not through the manhole cover, but through a pipeline located in the bottom of the well, which limits its scope.

Known mounted in the sewage well device for wastewater treatment [RU 2548323], selected as the closest analogue.

This device includes those installed in a storm water well and located one in another chamber, where filtering is carried out (in the terminology of the closest analogue considered, it is called the filtering compartment of the filter chamber), and a settling chamber. In the bottom of each of the chambers under consideration, a central through hole is made, the device comprising a vertically oriented overflow pipe having an upper open end portion installed inside said chambers and passing through said through holes. The settling chamber is made open at the top and has a continuous side surface and bottom. The chamber where the filtration is carried out (hereinafter referred to as the filter chamber) is made closed from above, has a continuous side surface and a bottom with holes for water passage. The filter chamber is installed in the settling chamber with the formation of a gap between the side surfaces of these chambers and their bottom parts. At the bottom of the filter chamber is a filter material. The overflow pipe is installed in such a way that its upper open end section is located in the filter chamber above the level of the location of the filter material with the possibility of overflow into the specified end section of the water passing through the filter material.

The device is placed inside the well in such a way that the water entering through the storm water inlet enters the gap between the chambers, accumulates in the lower part of the settling chamber, and then enters the filter chamber through the holes in its bottom part, and passes through the filter material placed in the filter chamber in the direction upwards. The purified water from the filter chamber through the overflow pipe is discharged from the device, enters the lower part of the well and is discharged from it.

The disadvantage of this device is the lack of efficiency due to low productivity due to the fact that the treated water enters the filter chamber only through the holes in its bottom, as well as the possibility of stagnant zones in the filter material due to unidirectional stationary movement through it being cleaned water in which water treatment is not intensive enough.

The objective of the invention is to increase the efficiency of the device.

The invention consists in that. that in the filtering device, including the filtering and settling chambers installed in the storm water well and located one in the other, in the bottom of each of which a central through hole is made, as well as a vertically oriented overflow pipe having an upper open end section installed inside these chambers and passing through these through holes, while the settling chamber is made open from above and has a continuous side surface and a bottom part, the filter chamber is made for dug from above and has openings in the bottom of the passage for water passage, the filter chamber is installed in the settling chamber with the formation of a gap between the side surfaces of these chambers and their bottom parts, filter material is placed in the lower part of the filter chamber, the overflow pipe is installed so that its upper open the end section is located in the filter chamber above the level of the location of the filter material with the possibility of overflow into the specified end section of the water passing through the filter material, according but to the invention, side openings for water passage are made in the side surface of the filtering chamber in an area located near its bottom, and the filtering chamber is equipped with an annular chipper made in the form of a truncated cone tapering downward, installed inside the filtering chamber with a gap relative to its bottom near the location of the side openings for the passage of water with the deviation of the water jets falling from the side openings towards the bottom h STI filter chamber.

In the particular case of the invention, the filter material is closed on top by an annular cover provided with openings for water passage, while the upper open end section of the overflow pipe is located in the filter chamber above the level of the filter material closed by the cover.

Due to the presence of filtering and settling chambers installed in one another in the inventive device, the liquid to be cleaned moves through the filtering material in the direction from the bottom to the top, while some of the particles of impurities settle in the settling chamber, and a much smaller amount of them is captured by the upward flow from the settling chamber and enters the filtering material . As a result, the filter material is less clogged by contamination particles.

Essentially important in the inventive device is the presence of side openings for the passage of water in the lower part of the side surface of the filter chamber adjacent to its bottom.

Thanks to these side holes increases the water intake area of the filter chamber, which leads to an increase in productivity of the claimed device.

In addition, due to the presence of these lateral openings, the water to be cleaned enters the filter chamber in different directions both from below through openings in its bottom and from the side through lateral openings.

As a result, multidirectional flows are formed in the volume of the filter material below the level of the location of the side openings. Due to this, the filtering material in the area under consideration does not work in a stationary mode, but in a mode characterized by the indicated multidirectional flows, forcing the filtering material to actively work (“move”) in the specified area, while the formation of stagnant zones in the filtering material is eliminated and its dirt resistance increases. This leads to the fact that in this area there is a retention of the main part of the pollution.

In the region lying above the level of the location of the side openings, there are no multidirectional flows in the filter material, and therefore it works under more stationary conditions and has a higher density. In this area, finer purification (post-treatment) of water occurs with the achievement of the required indicators of the degree of purification.

As a result of different filtration conditions existing in these two areas, a two-stage wastewater treatment, as it were, allows, with increased hydraulic load due to increased water intake area, to achieve high quality treatment.

Thus, the technical result achieved by the implementation of the claimed invention is to increase productivity, as well as achieving a high degree of purification, which leads to an increase in the efficiency of the device.

In the case when the filter material is closed on top with an annular cover equipped with openings for water passage, while the upper open end section of the overflow pipe is located in the filter chamber above the level of the filter material closed by the cover, the removal of its particles from the filtration zone and their ingress into the purified water is prevented, leading to irrational consumption of filter material and water pollution, and therefore to a decrease in the efficiency of the device.

In addition, by adjusting the force of pressing the cover against the surface of the filter material, it is possible to provide its required porosity.

The filter material in the inventive device can be placed in an annular cartridge provided with an annular lattice or mesh cover.

In the case when the filter chamber is equipped with the annular chipper described above, the jets entering through the side openings and reaching the chipper surface deflect towards the bottom of the chamber, due to which counter flows are formed in the lower region of the filter material, the presence of which even more activates the work filter material.

The drawing shows a General view of the device.

The device comprises a settling chamber 1 open from above, inside which a filter chamber 2 is placed. The settling chamber 1 has a continuous side surface 3 and a continuous bottom part 4. The filter chamber 2 is closed from the top and has a bottom part 5 provided with openings 6 for water passage and a side surface 7, in the lower part of which there are lateral openings 8 for water passage. In the bottom part 4 of the chamber 1 and in the bottom part 5 of the chamber 2 there are through central holes, respectively 9 and 10.

The device comprises a central vertically oriented overflow pipe 11 mounted inside the chambers 1 and 2 and passing through the through holes 9 and 10, having an upper open end section 12.

The chamber 2 is installed in the chamber 1 with the formation of a gap (not indicated by the position in the drawing) between their side surfaces 7 and 3 and their bottom parts 5 and 4. At the bottom of the chamber 2 there is a filter material 13. A filter material can be used, providing wastewater treatment from oil pollution and suspended particles. The overflow pipe 11 is installed in such a way that its upper open end section 12 is located in the chamber 2 above the level of the filter material 13 with the possibility of water entering the specified end section passing through the filter material 13.

The filter material 13 is closed from above by a lid 14 having openings 15 for the passage of water, made, in particular, in the form of a perforated pressure washer, which is installed with the possibility of regulating the force of its pressing against the filter material 13.

In the chamber 2 there is an annular bump 16, made in the form of a truncated cone tapering downward. The chimney 16 is installed inside the chamber 2 with a gap relative to its bottom part 5 near the zone of location of the side openings 8 to ensure that water jets falling on it from the side openings 8 in the direction of the bottom part 5 of the chamber 2. In particular, the chimney 16 is installed so that the outer surface is located opposite the upper group of holes 8.

The device operates as follows.

The device is mounted in a storm water well (not shown in the drawing).

The surface drain through the storm water inlet grate flows into the gap between chambers 1 and 2, accumulates in the lower part of chamber 1. At the same time, large particles of contaminants settle and accumulate in the bottom part 4 of chamber 1. When the water level rises to the level of the bottom part 5 of chamber 2, water enters it through holes 6 and upward flow passes through the filter material 13.

With further accumulation of water in the chamber 1 and upon reaching the level of arrangement of the holes 8 in the chamber 2, water enters through the indicated openings into the indicated chamber. In this case, part of the water jets, falling on the surface of the chipper 16, changes its direction and moves downward towards the upward flow.

In the filter material 13, which is below the location of the side openings 8, multidirectional flows arise, intensifying its sorption ability. In this area, the main part of the pollution is retained. In the filter material 13, located above the level of the location of the side openings 8, there is a post-treatment of water to the required degree of purification.

The purified water is discharged through an overflow pipe 11 to the bottom of the well and then discharged from it through a pipe system.

Claims (2)

1. A filtering device, including a filtering and settling chamber installed in a storm water well and located one in the other, in the bottom of each of which a central through hole is made, as well as a vertically oriented overflow pipe having an upper open end section installed inside these chambers and passing through said through holes, while the settling chamber is made open at the top and has a solid side surface and a bottom, the filter chamber is closed located on the top and has openings for water passage in the bottom part, the filter chamber is installed in the settling chamber with the formation of a gap between the side surfaces of these chambers and their bottom parts, filter material is placed in the lower part of the filter chamber, the overflow pipe is installed so that its upper open the end section is located in the filter chamber above the level of the arrangement of the filter material with the possibility of water entering the specified end section passing through the filter material, distinguishing the fact that in the side surface of the filter chamber in the area located near its bottom part, there are side openings for water passage, while the filter chamber is equipped with an annular chipper made in the form of a truncated cone tapering downward, installed inside the filter chamber with a gap relative to its bottom parts near the zone of location of the side openings for water passage, ensuring the deviation of water jets falling from the specified side openings from the specified side openings towards the bottom part and filter chamber. 2. The device according to claim 1, characterized in that the filter material is closed on top by an annular cover provided with openings for the passage of water, while the upper open end portion of the overflow pipe is located in the filter chamber above the level of the closed filter cover of the material.

Images