SU812745A1 - Unit for waste water purification - Google Patents

Description

one

 The invention relates to cleaning. wastewater of various industries, in particular, to prevent environmental wagons during the process of putting squash oil and gas on, and it can also be used in various industries of the national economy, where according to the process conditions it is possible to reuse purified water or open reservoirs.

A device for purification of industrial and domestic wastewater is known, comprising a chamber for settling, coagulation and flotation, water-air mixture preparation units, a foam rejection mechanism, as well as pumps, piping and control devices. This device, mainly intended for operation in stationary applications, is constructively complex, uncompact, and metal-intensive. Such a device consists of a coarse chamber with a pressureless hydro cyclone located below the water level, an adjacent flotation cell including several series-connected compartments with water distributors located in their lower part, a scraping device for removing oil and foam from the surface of the water and pockets. for collecting water and foam. The formation of air bubbles in the treated water is carried out by mixing a stream of purified water, which is fixed by air in the usual pressure flotation pattern by means of a pump, an ejector and a pressure tank. A pipe for supplying the water / air mixture is connected to the tangential nozzle of a non-pressure: hydrocyclone, and a coagulum supply pipe from the metering system or metering pump 1 is installed in front of the inlet of the nozzle.

The device includes a large number of nodes, energy-intensive, occupies a large area, it is difficult to manufacture and maintain.

The closest to the proposed technical essence and the achieved result is a device for wastewater treatment, containing a cylindrical sump with a whirlpool chamber and a swirler, foam collecting mechanism, pressure system from the pump and ejector, process piping 2.

The disadvantage of this device is insufficient efficiency.

his work because of the high energy intensity.

The purpose of the invention is to increase the efficiency of use of the plant for wastewater treatment due to reduced energy consumption.

This goal is achieved by the fact that the installation is equipped with a mixing chamber connected to the ejector and made of coaxially arranged cylindrical nozzles with annular and radial grooves and a packer for coagulant injection, as well as perforated piping attached to the swirler.

FIG. 1 shows the installation, general view; in fig. 2 is a view A of FIG. one; in fig. 3 - reported mixing chamber and ejector, general view; in fig. 4 is a section BB in FIG. 3

The installation includes a cylindrical body 1, a bottom 2 inclined to a central conical discharge neck 3, to which a pipeline 4 is attached to remove sludge. In the internal cavity of the housing. 1 coaxially installed a ring partition 5, hermetically attached in the bottom to the bottom. Between the housing 1 and the partition 5, two radial walls 6 are installed, which divide the annular space between the housing 1 and the partition 5 into the pocket 7 for draining purified water and the foam receptacle 8. A portion of the ring partition 5 in the pocket 7 is provided with an overflow threshold 9 with a guide plate serving to regulate the level of wastewater in an installation. In the upper part of the partition 5, a pallet 10 is installed, in which the foam collecting mechanism 11 is located, for example a chain structure with a scraper. The front wall 12 of the pallet 10 is submerged under the level of the liquid in the installation and serves to prevent Flotopena from entering the pocket 7. The concentric partition 5 has a whirlpool 13 inside the unit, the lower part of which is equipped with an extinguishing screen 14 for eliminating the vortex motion of the fluid at the outlet of the chamber. A mezvdu partition 5 of the wall of the turning chamber 13 and below the latter is a cylindrical settling tank 15 sediment. For a better distribution of water over the cross section of the sump 15 and to prevent: sedimentation of sediment in the lower part, a reflective shield 16 is provided. In the central part of the housing 1 a vertical pipe 17 is placed to introduce the wastewater mixture, with coagulant and air. A swirl 18, made in the form of a stationary Segner wheel, fitted with perforated ducts -19, located along the generator of the whirlpool chamber 13, is mounted on the upper part of the tube 17. The height of the swirler 18 can be adjusted in height by means of the flexible element 20. The ducts 19 are perforated with openings 21 for uniform output the jets of the mixture and their orientation tangentially to the inner wall of the whirlpool chamber 13. The mixing chamber 22 is hydraulically connected with the ejector 23. It includes a cylindrical part body with flanges 25 and 26 at both ends. On top of the housing 24 is hermetically sealed with a cover 27 by means of bolts 28, nuts 29 with washers 30 and 30 through a gasket. In the lower part, to the copus 24 is connected through the flange 31 of the transitional cylindrical-conical nozzle 32, which serves to hydraulically communicate the chamber 22 with the vacuum chamber 33 of the ejector 23. The cover 27. nozzles 35 and 36 coagulant feed. The nozzles are mounted inside the housing 24, respectively, on the annular supporting protrusions of the housing and the duct 37. The duct 37 is attached to the cover 27 by a nut 38 through the washer 39 and terminated on one side by fitting 40, on the other by a tip 41. Inside the duct 37 an axial hole is made, the tip provided with an inclined annular gap. The ejector 23 consists of a housing 42, to which a diffuser 44 and an expander 45 are connected by thread through sealing gaskets 43. The diffuser 44 fixes the nozzle 46 in the housing 42 with its protruding end. The ejector is installed in the sewage supply line 47 by means of quick-coupling nuts 48. A threaded bore 49 is made in the housing 42 to secure the transitional port 32 of the mixing chamber 22..

Thin lines outside the outline of the general view (Fig. 1) show the process piping, the remaining lines with arrows show the way of the sewage through the installation chambers.

The installation works as follows.

Claims (2)

Purified wastewater flows under pressure to ejector 23, in chamber 33 of which, due to the speed of jet outflow from nozzle 46, a reduced pressure zone is created, where the coagulum and air mixture prepared in the mixing chamber 22 is sucked. Coagulum enters through a fitting 34 p the radial channel of the cover 27, from where through the annular and radial channels of the cylindrical nozzles 35 and 36 - into the internal cavity of the housing 24, form a continuous annular jets between which air is fed from the tip 41 of the air duct 37. th peremeishvani coagulant air forms a mixture zasasyvaema then through pipe 32 to the ejector 23. In the reamer 45 of the latter, and in the outlet conduit Fakzhe complete dissolution occurs coagulant mixture with air with the wastewater. Then the mixture enters the swirler 18, the outflowing jets from the holes 21 twist and evenly mix the liquid in the whirlpool chamber 13 over its entire height, creating optimal conditions for flocculation and agglomeration of small flakes into coarse; Dissolved in water, air is released in the form of tiny bubbles and floats the fine slurry present in the effluent, petroleum products, and part of the flakes that float to the surface of the water. The water chamber 13 and the sump .15. Mechanical straight & large flakes formed at the outlet of chamber 13 and in sump 15 are deposited in a conical sludge part, from which they are periodically diverted for long. post processing. From the sump 15, the purified water enters through the overflow threshold 9 set below the level of separation of the phases of water and foam, and into the pocket 7, from where it is collected for reuse into the circulating water supply system. The foam from the surface of the water is removed with the help of the scraper-and-collector mechanism and into the foam receiver 8, where it is decanted. The proposed device is smaller and simpler, known, does not require energy consumption for the preparation of water-air mixture and the supply of coagulant, increases the efficiency of the wastewater treatment process. The invention The wastewater treatment plant, comprising a cylindrical sump with a whirlpool: a chamber and a swirler, a scraper foam gathering mechanism, a porous system from a us and an ejector, as well as process piping, characterized in that due to the reduction of energy consumption, it is equipped with a mixing chamber connected to the ejector and made of coaxially arranged cylindrical nozzles with annular and radial grooves and a coagulum inlet as well as perfo-. piped attached to the swirl "{those} sh. Sources of information taken into account during the examination 1. USSR author's certificate 336277, cl. C 02 C 1/26, 1966. 2. USSR author's certificate for software No. 2550696 / 29-26, cl. C 02 C 1/26, 1977. CH i 28,29.W