RU2069105C1 - Device for purification of sewage and other liquids - Google Patents

Abstract

FIELD: purification and clarification of sewage and other liquids from suspended particles. SUBSTANCE: device has cylindrical conical hydrocyclone with cover, tangential supply branch pipe and axial sludge and drain branch pipes, drain chamber with filter element and scraper; drain branch pipe of hydrocyclone is bent in its construction and is connected in series with distributor and drain chamber made in form of hollow fixed vertical perforated drum with filtering material which is mounted coaxially relative to distributor and in parallel with hydrocyclone arranged in housing of filtrate chamber and is provided with central shaft with drive and cross-member on which scrapers are diametrically fitted; scrapers are made in form of pipes with longitudinal slots or in form of half-pipes. Conical portion of hydrocyclone and lower portion of drain chamber are connected in parallel with sediment accumulating and dewatering bin. Provision is also made for controllers of working layer on filtering surface which are mounted on slotted pipes or on half-pipes. EFFECT: enhanced reliability. 2 cl, 1 dwg

Description

 The invention relates to devices for purification and clarification of wastewater of various origins and other liquids from suspended particles of impurities, in particular, apparatus for filtering contaminated water at oil refineries 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 that initially increases (with the formation of a working layer on the filter surface with an increase in its thickness to optimal), and then, as the filter clogs, it falls, which requires stopping the device for backwashing or changing the filter material.

 A device for cleaning the inner surface of the apparatus, in which the acid is separated from the sludge, is made in the form of a scraper [2] containing two pairs of rotating brackets with rows of scraper blades overlapping 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 wastewater treatment [3] and a cylindrical tank of which a treatment system is located, 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-arranged elements of triangular section and at the bottom are scrapers. This 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.

 A self-cleaning filter (its variants) [5] is known, in the housing of which a cylindrical filter element is installed that can rotate and contains 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 wastewater treatment device containing a cylindrical-conical body with a cover, a tangential feed, axial slurry and drain pipes, a drain chamber with a filter element, a scraper device, a filtrate chamber with a filtrate discharge pipe [6] The drain chamber is made in the form of a rotating perforated drum with an endless filter system, mounted coaxially on the drain pipe of a hydrocyclone, and the wall is equipped with squeezing and adjusting rollers and an apron with a guiding scraper device located outside the filtrate chamber.

 However, this device does not provide a device to maintain an optimal working layer on the filter surface. The 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 the filtrate chamber body with an outlet pipe and a drain chamber, combined sequentially in the upper (through the coaxial distributor) and parallel to the lower (through the sludge collection and dewatering hopper) parts with a hydrocyclone having a curved a drain and inlet pipe, and a centrally located scraper with a shaft, a spider and a drive, the filter element being made in the form of a hollow vertical stationary perforated drum with fi with a blasting material forming a drain chamber, and the scraper is made in the form of diametrically arranged pipes with longitudinal slots or half pipes, equipped with additional 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.

 The drawing shows a General view of the device.

 The device consists of a hopper 1, a cylindrical hydrocyclone 2 with a cover, with a tangential inlet pipe 3 and a curved drain pipe 4, a drain chamber (filtrate chamber) 5 with a filter element 6 and a scraper 7 mounted on a shaft 8 with a cross. The shaft 8 is equipped with a drive 9. The distributor 10 is coaxially placed in the upper part of the drain chamber 5, and in its lower part there is a pipe 11 for discharging the filtrate. The hydrocyclone 2 and the chamber of the filtrate chamber 5 are connected by their lower parts to the hopper 1 for collecting sediment.

 The scraper 7 is equipped with a working layer controller on the filter surface and has cutting parts in the head along the side of the scraper rotation and ironing devices in the rear part. The scraper is made in the form of diametrically arranged pipes with longitudinal slots or in the form of half pipes.

 The device operates as follows. The original untreated water is supplied to the hydrocyclone 2 through the pipe 3, freeing large inclusions in it, and then, filling the hopper 1 and the housing of the drain chamber 5, penetrates the filter element 6 and is discharged through the pipe 11 for further purification or use in the reverse system. Particles suspended in water are trapped on the mesh of the filter elements forming a working layer, and with a further growth of the latter, they can clog the filter and cause the device to stop, rinse or change the filter element. However, thanks to the scraper 7 rotated by the drive 9, 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 dirt pipe of the scraper 7, enters the hopper 1.

 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, containing a cylindrical conical hydrocyclone with a cover, a tangential feed, axial slurry and drain pipes, a drain chamber with a filter element, a scraper device, a filtrate chamber with a filtrate discharge pipe, characterized in that the drain pipe of the hydrocyclone is made bent and connected in series with the distributor and the drain chamber, made in the form of a hollow stationary vertical perforated drum with filter material installed coaxially with the distributor and parallel to the hydrocyclone enclosed in the filtrate chamber body and containing a centrally located shaft with a drive and a crosspiece on which scrapers are arranged diametrically, made in the form of pipes with longitudinal slots or half pipes, while the conical part of the hydrocyclone and the bottom of the drain chamber are connected in parallel with the hopper collecting and dewatering sludge.  2. The device according to claim 1, characterized in that the pipes with slots or half pipes 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.