RU2324036C1 - Sewage and storm water pre-cleaning method and device for its realisation - Google Patents

Abstract

FIELD: agriculture; sphere of sewage and storm water pre-cleaning.

SUBSTANCE: sewage and storm water pre-cleaning method includes sewage water feed, its filtration through installed cleaning grid made as set of plates retaining large mechanical impurities, their deposing to grid basis. Device for sewage and storm water pre-cleaning includes retaining grid installed in it at an angle to water flow and made as set of plates installed with equal spacing, and accumulating tray for garbage collection. It contains also reservoir with water feed socket, compressor, control unit and air distributor. Retaining grid plates are pierced with horizontal line aerators installed in cascade.

EFFECT: increasing efficiency and performance reliability.

3 cl, 1 dwg

Description

The invention relates to methods and installations, in particular to devices for trapping and removing from sewage and storm water the largest contaminants, debris, waste, mechanical impurities, and is intended for use in municipal services in sewage pumping stations and in industrial systems of sewage treatment plants in cities, villages and detached houses and cottages.

Known technical solution according to the patent of the Russian Federation No. 1527386, class. E03F 5/14, 1987, which describes a delay device for extracting waste from wastewater, made in the form of a lattice formed by plates, and the cleaning of the lattice is carried out by means of a moving rake. However, this technical solution is complex, requires a certain manufacturing accuracy to ensure the passage of rakes between the plates of the lattice.

Known technical solution according to the patent of the Russian Federation No. 2107781, class. E03F 5/14, 1996, which describes a device for trapping and extracting mechanical impurities from a fluid stream, made in the form of several sections of filter screeners, consisting of combs, and the scrapers clean the combs and direct the mechanical inclusions to the mechanism by which they are delayed and deleted. Use of this device is only possible with a horizontal flow direction.

Known technical solutions for copyright certificates of the USSR No. 859566, 992674, class. E03F 5/14, in which the delaying working body is made in the form of an endless flexible element. However, these devices are inefficient and require large energy consumption for their drive.

Known technical solutions for the author's certificate of the USSR No. 1477859 and the patent of the Russian Federation No. 2086737, class. E03F 5/14, in which the retarding working body consists of an arc-shaped grate, cleaned with a scraper and a mechanism for dumping waste from the scraper. However, these devices are very complex, material-intensive and require large costs for manufacturing and operation.

The closest technical solution is the "Device for the retention and removal of mechanical impurities from wastewater" according to the patent of the Russian Federation No. 2253717, class. E03F 5/14, 2002, in which the delaying device is made in the form of a lattice consisting of a set of plates mounted with a gap between them. A quick-detachable tray is installed at the bottom of the grill to collect trapped impurities. As impurities accumulate on the grate, the drive raises the grate with the tray, and the grate is additionally cleaned with a rotating brush, which also removes impurities from the tray. However, this device requires at least two gratings in the channel, since the other works during the lifting and cleaning of one grate. The device is difficult to manufacture, since it is necessary to observe the matching of the shape of the tray with a cleaning brush and grate.

The technical task of the present invention is the creation of a simple constructive implementation of the delay device, efficient and reliable in operation, reducing the cost of its manufacture and operation.

The problem is achieved in that in the proposed method for pre-treatment of wastewater and storm water, including the supply of wastewater, filtering it through an installed cleaning grate made of a set of plates installed with a gap that delays large mechanical impurities, depositing them to the base of the grate, water is fed into the receiving tray with a perforated bottom, and the cleaning grill is installed pivotally parallel to the wall of the receiving tray, and periodically to clean the perforated bottom from debris coarse-bubble aeration is carried out, and cascade aeration is carried out to clean the grate by supplying air to the aerators penetrating the grating plates, causing the surface level to rise and flow along with debris through the upper edge of the receiving tray. The method is characterized in that linear aerators are installed inside the grate cascade perpendicularly to the plates of the cleaning grate.

This object is achieved by the fact that in the device for pre-treatment of wastewater and storm water, including a container with a water supply pipe and installed in it at an angle to the water flow of the delay grid, made in the form of a series of plates installed with the same gap, and an accumulation tray for collecting garbage, while the device is equipped with a compressor, a control unit and an air distributor, and the plates of the delaying grid are penetrated by cascading finely bubbled aerators, while the grid is hinges it is tilted, inclined, and cantilevered mounted on the bottom of the tank, and its lower part is covered with a panel, the upper face of which is located in one vertical plane tangent to the generatrix of the lower linear aerator, the ends of all aerators are closed with plugs, and each of them interacts with the air distributor, and the storage the tray is made in the form of a trapezoidal bucket with an open top located horizontally, while the bottom of the bucket is perforated, and one of its walls is vertical, equipped with rollers, interacting with guides mounted on the wall of the tank, and the other wall of the bucket is equipped with an upper visor and is parallel to the delaying grid, equipped with a vertical partition mounted on the free end of the grate, the bottom of the bucket resting on a stopper mounted on the wall of the tank below the guides, and the supply pipe is located over the bucket.

The drawing shows a device for pre-treatment of wastewater and storm water.

The device contains a container 1 with an inlet pipe 2, through which sewage and storm water enter it. Capacity 1 is divided into compartments. The first compartment 3, which directly receives water directly, is made in the form of a bucket 4, which is actually a storage tray, while one of the walls 5 of the bucket is mounted vertically, equipped with rollers 6, by means of which the bucket moves up and down along the guides 7 mounted on the wall 8 containers. The second wall 9 of the bucket 4 is inclined, and the bottom 10 is perforated, and the free end 11 of the second wall 9 is equipped with a visor 12, bent into the compartment 3. Below the perforated bottom 10 there is a linear aerator 32. A limiter is mounted on the wall 8 of the tank 1 below the guides 7 13, on which the bucket 4 rests with its bottom 10. The inlet pipe 2 is located above the compartment 3. The second compartment 14 is formed by the perforated bottom 10 of the bucket 4 and the inclined wall 9 of the bucket 4 and the oblique mounted delay grille 15, and the grille is installed Lena parallel to the inclined wall 9 of the bucket 4. The lattice 15 is formed by a set of plates 16 mounted with a gap, and the gap between the plates 16 is less than the perforation made in the bottom 10 of the bucket 4. The lattice 15 with its lower end 17 is pivotally mounted in the seat 18 on the bottom 19 of the tank 1, and the free cantilever end 20 is provided with a vertical partition 21 and a plate 33. The lower part of the grill 15 is covered by a panel 22, so that its upper face 23 is located in one vertical plane AA with the generatrix of the lower 24 aerator. The plates 16 are cascaded with linear aerators 25, the ends of which are closed by plugs, and each of the aerators 24, 25 interacts with the air distributor 26. The third compartment 27 is formed by a delaying grid 15 and a second wall 28 of the tank 1, in which an overflow hole 29 is made for overflowing pre-treated water into subsequent treatment tanks. The device is equipped with a compressor 30, a control unit 31.

The device operates as follows. Wastewater and storm water through the inlet pipe 2 enter the first compartment 3, in which large mechanical inclusions are retained, and the water passes through the perforated bottom 10 into the compartment 14. When this device is installed in biological treatment systems, regenerative activated sludge can be introduced into the first compartment, while in the first compartment aerobic biological treatment will take place, which eliminates the appearance of foul odor and promotes biodegradation of organic waste already at the stage of preliminary cleaning water In the second compartment 14, water is also filtered and debris trapped on the grate 15, and since the grate is installed obliquely, the garbage settles to its base. In addition, for effective cleaning of the perforated bottom 10 and the grill 15 periodically or constantly, depending on the pollution of waste water, and especially storm water, air is supplied to the linear aerators 32, 24, 25, which are installed in cascade, and therefore the grill 15 is aerated, those. purged with air, and mechanical impurities rise air up. The presence of the panel 22 and the plate 33 eliminates dead zones in the compartment 14, not blown by air. When air is supplied to linear aerators, water sparges in the second compartment 14, causing the water level in the compartment to rise above the visor 12, thereby creating the conditions for gravity to flow water with garbage into compartment 3, where all garbage is collected in the bucket 4. Thanks to the hinged fastening of the delay lattice 15, you can change its angle of inclination, thereby changing the area of the water mirror in compartment 14, which creates the conditions for better flow of water with debris when air is supplied to linear aerators. As the garbage accumulates in the bucket, it is lifted and the garbage is thrown away, while it is not scary that some garbage will fall into the second compartment when the bucket is missing, after installing the bucket, the garbage will flow together with water into the bucket when the grate is aerated.

The proposed device is manufactured, tested in existing installations and has shown reliability in operation. The proposed device significantly increases the efficiency of preliminary treatment of wastewater and storm water from mechanical impurities, it is simple in design and does not require any maintenance costs.

Claims (3)

1. The method of pre-treatment of wastewater and storm water, including the supply of wastewater and storm water, filtering them through an installed cleaning grate, made in the form of a set of plates that trap large mechanical impurities, depositing them to the base of the grate, characterized in that the water is fed into the receiving tray with a perforated bottom, periodically clean it by supplying coarse-bubble aeration, and to clean the grate, aerate by supplying air to linear aerators penetrating the grating plates, causing a level rise I am the surface of the water and its flowing together with the detained mechanical impurities through the upper edge of the receiving tray. 2. The method according to claim 1, characterized in that the linear aerators are installed inside the grate perpendicular to the plates of the cleaning grate. 3. A device for pre-treatment of wastewater and storm water, including a delay grid installed in it at an angle to the water flow, made in the form of a series of plates installed with the same clearance, and an accumulation tray for collecting garbage, characterized in that it contains a supply tank water pipe, compressor, control unit and air distributor, and the plates of the delaying lattice are pierced by horizontally cascading linear aerators, while the lattice is hinged, inclined and cantilevered and the bottom of the tank, and its lower part is closed by a panel, the upper face of which is located in the same vertical plane with the generatrix of the lower linear aerator, the ends of all aerators are closed with plugs, and each of them interacts with the air distributor, and the storage tray is made in the form of a trapezoid bucket with an open top, located horizontally, while the bottom of the bucket is perforated with a linear aerator installed underneath, and one of the walls of the bucket is located vertically, equipped with rollers interacting with guides mounted on the wall of the tank, and the other wall of the bucket is equipped with an upper visor and is located parallel to the delaying grate, equipped with a vertical partition mounted on the free end of the grate, the bottom of the bucket resting on a stopper mounted on the wall of the tank below the guides, and the supply pipe is located above bucket.