RU68498U1 - SEWAGE TREATMENT PLANT - Google Patents

Abstract

The wastewater treatment plant is intended for the purification and post-treatment of wastewater from finely divided suspended solids and oil products. In the tank (1) there is a sump and a filter with a floating charge (2) located in the end part of the sump. Two vertical cylindrical shells (3) divide the sump into two parts. The gap between them is intended for the free passage of the device for the continuous removal of dirty wash water (7). Wastewater moves from the center of the sump to the periphery. Passing thin-layer radial elements (10), the fine-dispersed part of suspended solids is delayed. Next, the wastewater enters the filter with a floating charge (2), where it is further treated. Flushing the filter with a floating charge (2) is carried out when moving the device for the continuous removal of dirty wash water (7). Wastewater is collected in a device for collecting and discharging purified water (5), 2 sludge.

Description

The utility model relates to the field of wastewater treatment and purification from finely divided suspended solids and oil products with or without treatment with reagents and is mainly used in the purification and purification of domestic and industrial waters and surface runoff.

There are various designs of thin-layer sedimentation tanks designed to separate slurries and emulsions (Sewage and waste water treatment in St. Petersburg. Under the general editorship of FV Karmazinov: Stroyizdat SPb, 1999., p. 298).

Known radial sump containing a cylindrical body, with a central water distribution system and rectangular plates inclined to the horizontal plane, drainage trays, scrapers for collecting and removing sludge, the plates are fan-shaped at the same distance from each other and from the center of the sump, so that their central horizontal axis placed radially (SU No. 689958, 02 C 1/26, bull. No. 37 of 05.10.79.).

However, this thin-layer sump does not provide protection against the removal of fine particles of suspension in the end part of the sump, directly at the drainage channel, due to which, especially during the unsteady mode of its operation and in normal mode, slips in the suspension are possible and the processing efficiency of the liquid being cleaned is possible. Due to the large area occupied by the shelf thin-layer blocks, the design of scrapers is complicated and the efficiency of sludge removal may be reduced, which in post-treatment facilities for domestic and industrial wastewater can lead to decay of the sludge and reduce the quality of treatment.

Closest to the proposed technical solution is the installation for wastewater treatment, containing a tank with a settling tank and a filter in it, means for supplying initial wastewater to the inlet of the settling tank, devices for collecting and discharging purified water located in the upper part of the settling tank, an air supply system and a device for removing sludge, and the filter is made with a floating load, placed horizontally directly in the upper flow zone of the sump adjacent to the device for collecting purified water, and ogre it is similar on both sides with vertical walls forming a cavity above the filter loading connected with the device for collecting and discharging purified water, while a device for periodically discharging dirty washing water is installed above the loading layer, and the air supply system contains an aeration device located under the loading and connected through the duct to the gas blower, installed with the possibility of periodic inclusion (RU No. 290553, СО2F 3/06, 27.04,2003).

A variation of the installation is its modification with a filter in the form of a ring with vertical outer and inner walls formed by cylindrical shells concentrically located in the tank, and windows are formed in the outer wall that communicate with the cavity above the filter loading with the annular chute, while a device for periodically discharging dirty wash water is a perforated suction pipe placed radially above the load with the possibility of rotation relative to the center of the tank and hydrochloric the central zone of the settler through radial conduit and the suction pump.

The liquid to be cleaned enters the structure through the inlet devices, passes the settling zone, the filter and is collected by the drainage devices. As the filter rinses, the filter is flushed with the wash water collected above the filter load.

The disadvantages of this design is the asymmetric location of the catchment channel relative to the filter load (filter area in plan), leading to an uneven distribution of the flow of treated water. As well as the complexity of the process of washing the floating filter load carried out with water drainage above the filter and the possibility of clogging the filter load with sufficiently large particles of suspension (in its lower part) not delayed in the settling zone of the installation in connection with the implementation of the usual rather than thin-layer settling process, which at the washing process is transported with a fluid stream into the area above the filter, passing through the entire layer of the filter load, into the cavity of the compartment designed to collect purified water when still on duty mode. The noted drawbacks lead to uneven flow distribution, a decrease in the duration of the filter cycle due to the more intensive intake of suspended sediment on the filter, and washing carried out from the side of the least intensely polluted top layer of the load with the transportation of dirty wash water through it reduces the quality of water treatment and purification and productivity facilities.

The objective of the utility model is to increase the efficiency of liquid purification and increase productivity while maintaining the cleaning effect, due to a more optimal flow distribution, thin-layer sedimentation of the liquid in the end part of the sump immediately in front of the filter and an effective continuous or intermittent suction washing system, which is carried out on the side of washing the most dirty filter , guaranteeing the absence of leakage of pollution through the filter.

The technical result is achieved by the fact that in the installation for wastewater treatment, containing a tank with a settling tank and a filter with a floating charge located in the end of the settler, separated from the rest of the settler by two

vertical cylindrical shells, means for supplying initial wastewater to the inlet of the sump, a device for collecting and discharging purified water located in the upper part of the sump, a device for removing sludge, characterized in that it is equipped with a device for continuously discharging dirty wash water, which is located under the filter with a floating charge, nets rigidly connected to the wall of the sump and a device for collecting and discharging purified water, the first mesh being installed above the filter with a floating loading, and the second The net is installed below the filter with a floating load, and the vertical cylindrical shells are placed in the tank with an annular gap between them.

Thin-layer radial elements are installed under the continuous drainage system for dirty wash water.

An embodiment of a device for continuously discharging dirty wash water comprises a suction pipe with perforation on the upper surface connected to a submersible pump that is connected to a pressure pipe.

To protect the perforation, the suction pipe of the device for continuous drainage of dirty wash water has a hemispherical casing with a protective mesh mounted above the perforation.

Figure 1 shows a section of the proposed installation for wastewater treatment. Figure 2 shows the installation plan.

The installation comprises a tank 1 with a settling tank and a filter with a floating load 2, two vertical cylindrical shells 3, means for supplying the initial wastewater 4, a device for collecting and discharging purified water 5, a device for removing sludge 6, a device for continuously discharging dirty washing water 7, mesh 8 restricting the filter with a floating load 2 on top and mesh 9 restricting the filter with a floating load 2 on the bottom, thin-layer radial elements 10.

The wastewater treatment plant operates as follows: the liquid to be cleaned is supplied to the installation center, coarse suspended solids settle on the path of movement from the center of the tank 1 to the end of the tank 1, separated from the rest by vertical cylindrical shells 3, enters the thin-layer radial elements 10, where fine particles of suspended solids are held, then into a filter with a floating charge 2, purified water is collected in a device for collecting and discharging purified water 5. 3 contamination arrested in thin radial elements 10 are removed independently beyond them in the sediment of the tank 1, the serving device 6 to remove sediment.

Flushing the filter with a floating charge 2 is carried out continuously or periodically when moving the device for the continuous removal of dirty wash water 7. Dirty wash water is discharged into the head of the installation.

Improving the efficiency of the treatment or the performance of the wastewater treatment plant is achieved due to the symmetrical arrangement of the device for collecting and discharging treated water 5 relative to the filter with a floating charge 2, better retention of fine fractions of the suspension in thin-layer radial elements 10 and the protection of the filter with a floating charge 2 with thin-layer radial elements 10 from possible contamination due to the removal of contaminants when the sediment is stirred up by the device for removing sediment 6 or when changing the hydrodynamic mode of the installation, as well as a device for continuously discharging dirty washing water 7, which provides an extension of the load during washing, qualitatively washing the floating load of the filter 2 from the side of its greatest pollution, which reduces the pressure loss in the filter layer, ensuring an increase in the productivity of the structure while maintaining the effect cleaning up.

Claims (4)

1. Installation for wastewater treatment, comprising a reservoir with a settling tank and a filter with a floating charge located in the end part of the settling tank, separated from the rest of the settling tank by two vertical cylindrical shells, means for supplying the initial wastewater to the entrance of the settling tank, a device for collecting and drainage of purified water, located in the upper part of the sump, a device for removing sludge, characterized in that it is equipped with a device for the continuous drainage of dirty wash water, which once still under the filter with a floating charge, grids rigidly connected to the wall of the sump and a device for collecting and discharging purified water, the first mesh installed above the filter with a floating load, and the second mesh installed below the filter with a floating load, and vertical cylindrical shells are placed in a tank with annular gap between them. 2. Installation according to claim 1, characterized in that under the device for the continuous removal of dirty wash water installed thin-layer radial elements. 3. Installation according to claim 1, characterized in that the device for the continuous removal of dirty wash water contains a suction pipe with perforation on the upper surface, connected to a submersible pump, which is connected to the pressure pipe. 4. Installation according to claim 3, characterized in that the suction pipe of the device for the continuous removal of dirty wash water has a hemispherical casing with a protective mesh mounted above the perforation.