RU2069102C1 - Device for purification of sewage and other liquids - Google Patents

Abstract

FIELD: devices for purification of sewage and other liquids. SUBSTANCE: device has filter, hydrocyclone and sediment collecting bin. Filter is made in form of vertical perforated drum with any filter material; fitted on shaft in center of drum is scraper made in form of pipes located diametrically and provided with longitudinal slots or half-pipes fitted with controllers of working layer on filtering surface; controllers have cutting device in head portion in way of rotation of scraper and dragging device in tail portion. Filter housing is combined with hydrocyclone connected with sediment collecting bin. EFFECT: enhanced efficiency. 2 cl, 1 dwg

Description

 The invention relates to a device for purification and clarification of wastewater of various origins and other liquids from suspended particles of impurities, in particular to apparatus for filtering contaminated water at enterprises, oil refining and petrochemicals and car wash stations, including with reverse water supply systems.

 A known filter for wastewater treatment [1] is made in the form of a vessel with inlet and outlet pipes, divided internally into two chambers of different volumes by a vertical mesh filtering partition. The efficiency of such a filter is a variable, initially increasing (with the formation of the working layer on the filter surface and increasing its thickness to optimal), and then, as the filter clogs, it falls, which requires stopping the device for backwashing the filter change.

 A device for cleaning the inner surface of the apparatus, in which there is a separation of liquid from the sludge, is made in the form of a scraper [2] containing two pairs of rotating brackets and rows of scraper blades that overlap different annular sections of the surface to be cleaned. The disadvantage of this device is the significant metal consumption and manufacturing complexity.

 A device for mechanical water purification [3] is known in a cylindrical tank which contains a treatment system, including precipitators, scrapers, a ring with a rotation mechanism, a central support and screeds, in the upper part of which precipitators are installed made in the form of hollow concentric elements of triangular section, and at the bottom of the scraper. This system is difficult to manufacture and very metal intensive.

 For cleaning and washing the mesh conical filter element, a rotating device is placed inside the latter, on the outer surface of which a spiral dirt collector is made [4] However, this device does not provide an optimal working layer on the filter surface of the element.

 Known self-cleaning filter (its variants) [5] in the housing of which is mounted rotatably with a cylindrical filter element containing a scraper element in the conical part. The complicated design of the filter provides only self-cleaning continuity, but does not optimize the thickness of the working layer on the filter surface.

 Closest to the proposed device is a device for separating mechanical impurities from a wastewater stream [6] including a vertical cylindrical apparatus with a tangential supply of treated wastewater, a periodical discharge pipe for heavy impurities released under the action of centrifugal forces, and a cylindrical mesh apparatus centrally located inside the apparatus (CSA) for filtering the wastewater stream freed from heavy impurities with nozzles for discharge of filtered wastewater to subsequent herds and cleaning and a centrally located screw in the CSA for cleaning the working surface of the straining mesh. However, this device does not provide a device to maintain an optimal working layer on the filter surface.

 The present invention eliminates the inherent prototype and a number of well-known analogues of the disadvantages.

 This is achieved by the use of a device for treating wastewater and other liquids, including a filter with an inlet pipe, combined at the bottom with a hydrocyclone with an outlet pipe, a scraper with a shaft and a drive and a hopper for collecting sludge, in which the filter element is made in the form of a vertical perforated drum with any filtering material, and the scraper is made in the form of opposite pipes with longitudinal slots or half pipes, additionally equipped with controllers of the working layer on the filtering surface, containing cutting head in the head along the rotation of the scraper, and ironing devices in the rear part.

 The drawing shows a General view of the device.

 The device consists of a hydrocyclone 1 with a tangential pipe 2 for fluid injection, a filter 3 with a filter element 4. A scraper is centrally placed on the shaft 5 with a drive 6 and a crosspiece, made in the form of diametrically arranged pipes 7 with longitudinal slots 8 (see Fig. 3) or half pipe. The outlet pipe 9 is located in the lower part of the filter 3. The lower part of the hydrocyclone 1 is connected to the hopper 10 for collecting sediment. The scraper 7 is equipped with a controller 11 of the working layer on the filtering surface with cutting and ironing devices in the head and tail, respectively.

 The device operates as follows. The original untreated water is fed into the hydrocyclone 1 through the pipe 2, freeing large impurities in it, and then, filling the filter housing 3, penetrates the filter element 4 and is discharged through the pipe 9 for further purification or use in the reverse system. Particles suspended in water are retained on the filter element, forming a working layer and with further growth of the latter can clog the filter and cause the device to stop, rinse and rinse the filter element. However, thanks to the scraper 7 rotated by the drive 5, the excess part of the working layer is continuously cut off and the necessary part remaining on the filter surface is ironed. Cut sediment, slipping through the tubular mud collection of the scraper 7, enters the hydrocyclone 1 and then discharged into the hopper 10.

 The filtering efficiency is increased due to the preliminary separation of large inclusions, the creation and continuous maintenance of an optimal working layer on the filter surface due to the shearing-ironing design of the scraper.

 The advantage of the proposed device along with the increased duration of continuous filtering are low metal consumption and energy consumption.

Claims (2)

 1. A device for treating wastewater and other liquids, including a filter element, a hydrocyclone, an inlet and outlet pipe, a scraper device with a shaft and a drive, a means for collecting sludge, characterized in that the filter element is coaxially placed in a common hydrocyclone body and is made in the form a vertical perforated drum with filter material, inside the housing on the shaft with a spider, a scraper is centrally placed, made in the form of diametrically arranged pipes with longitudinal slots or half-pipes, while the lower part of the hydrocyclone is connected with a means for collecting sediment, made in the form of a hopper.  2. The device according to claim 1, characterized in that the pipes with longitudinal slots or half pipes of the scraper are equipped with controllers of the working layer on the filter surface, having cutting parts in the head along the side of the scraper rotation and ironing devices in the tail section.