RU2146961C1 - Radial settler with built-in compact final cleaning unit - Google Patents

Abstract

FIELD: cleaning sewage from settling or floating mechanical impurities. SUBSTANCE: settler has cylindrical reservoir, central runoff, silt exhauster and circular water header. Settler is provided with compact final cleaning unit with pipes-filters mounted in circular water header and intended for filtering settled clarified water. Washing the pipes-filters is effected by delivery of air to water header. EFFECT: deep cleaning of sewage; cleaning of flushing water from final cleaning unit in the same settler. 2 dwg

Description

 Radial sump with integrated compact aftertreatment unit.

 1. The technical field to which the invention relates.

 The invention relates to the field of wastewater treatment, in particular to devices for mechanical and deep water treatment, intended for the separation of sedimentary or pop-up mechanical impurities from water (separation of suspensions).

 2. The prior art.

 Analogs of the present invention are a secondary radial sump, a sump with a filtration system, drain pipe filters.

 The radial sump is intended for clarification of water (separation of suspensions) due to sedimentation at low speeds of movement of wastewater (suspension).

 (Zhukov A.I., Mongait I.L., Rodziller I.D. "Methods for the treatment of industrial wastewater", M., Stroyizdat, 1977).

 The disadvantages of radial sedimentation tanks are the removal of suspended solids with purified water with an increase in the speed of runoff or the emergence of turbulent or jet motion of a liquid, or in the presence of suspended particles in the water (suspension) with a relatively low deposition rate (low hydraulic size).

 A sump with a filtration system refers to devices for the post-treatment of wastewater and the discharge of thickeners after settling or thickening from suspended solids by filtration through a filter cloth and can be used for the post-treatment of industrial waste water (USSR copyright certificate 1780804).

 The disadvantages of the sump with a filtration system are the abrasion of the filter cloth with the edges of the slotted slot, the need for drainage and purification of wash water.

 Drainage pipe filters are used to reduce water on sludge and sludge sites (Advertising information. "Water supply and sanitary equipment", 1996, N 6, p. 6).

 3. The invention.

 The aim of the invention is to increase the efficiency of treatment of wastewater (suspension) in a radial sump, combining the processes of settling water and filtering in one structure (radial sump), to avoid the appearance of washing water in the process of post-treatment of wastewater and the need for their transfer to treatment and additional treatment.

 4. The list of figures of the drawings.

FIG. 1 is a section of a radial sedimentation tank with an integrated after-treatment unit;
FIG. 2 is a plan of a radial sedimentation tank with an integrated after-treatment unit.

 5. Information confirming the possibility of carrying out the invention.

 A radial sump with an integrated compact tertiary treatment unit is shown in the drawing in plan (Fig. 2) and in section (Fig. 1), contains a cylindrical tank (sump body) 1, a central spillway 3, a suction pump 6, pipe filters 4, an annular drainage collector 5, pipelines for supplying wastewater for treatment 2 and air for the regeneration of pipe filters 8, pipelines for discharging purified water 7 and sludge 9.

 Radial sump with an integrated aftertreatment unit operates as follows.

 Wastewater is supplied through pipeline 2 through a central spillway 3 to a sump 1, where suspended solids are deposited. The clarified water is filtered by pipe filters 4, collected in an annular collector 5 and discharged through the pipeline of purified water 7.

 The precipitate deposited at the bottom of the sump is collected by a suction pump 6 and discharged from the sump through pipeline 9.

During operation of the radial sump with an integrated after-treatment unit, a gradual siltation of pipe filters occurs. At the same time, the pressure loss in the pipe filter system increases, the water level in the sump increases. To restore the throughput of the pipe filters, their air-water washing is performed. To perform water-air washing of the pipe filters of the integrated after-treatment unit, it is necessary to reduce the flow of wastewater through the pipe 2 to stabilize the water level in the sump 1, shut off the water outlet from the ring collector 5 with a shutter 10, open the compressed air supply through pipe 8 to the ring collector 5. Under pressure of compressed air there is a water-air washing of the pipe filters 4 with a reverse flow of water and air. Water-air washing of pipe filters is carried out for 10 ... 15 minutes with an excess air pressure of 0.1 ... 0.15 MPa (1 ... 1.5 kgf / cm ² ).

 At the end of the flushing of the pipe filters 4, the supply of compressed air to the collector 5 is stopped, the shutter 10 opens on the piped water outlet 7 and the flow of wastewater to the sump 1 through the pipe 2 increases. The radial sump with an integrated after-treatment unit goes into operation mode.

Claims (1)

 A radial sump with an integrated compact tertiary treatment unit, comprising a cylindrical tank, pipelines for supplying wastewater for treatment, drainage of purified water and sludge and an annular drainage collector with filters, characterized in that the sump is equipped with an intake pipe for filter regeneration connected to the annular drainage collector, while the filters are made in the form of pipe filters.

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