SU912657A1 - Apparatus for purifying effluents - Google Patents

Description

(54) INSTALLATION FOR SEWAGE TREATMENT

I

The invention relates to devices and apparatus used for the treatment of wastewater from various industries, and is primarily intended to prevent environmental contamination during well and oil well gasing. It can be used in various sectors of the national economy, where, according to the conditions of the technological process, it is possible to reuse treated water or discharge it into open water bodies.

The closest to the technical essence and the achieved effect to the proposed is the installation, which includes a cylindrical body, a sump with a whirlpool chamber and a swirl, made in the form of arcs and perforated pipelines, a float attached to the whirlpool chamber, a reflective shield, a scraper picker, a sludge cutter and process pipelines ll.

The proposed device is not efficient enough to work, because when the sludge is drained from the settling tank in the installation, a significant amount of water is drained due to the fact that prolonged sludge (dewatering) leads to loss of fluidity and blockage of pipelines and stop valves. In addition, perforated pipes are reinforced to a swirler on arcs.

to the same length, which leads to the formation of a zone of stagnation in the central part of the whirlpool chamber and, accordingly, negatively affects the quality of agglomeration of small flakes into large ones.

The purpose of the invention is to increase the efficiency of the installation in operation.

The goal is achieved by the fact that in an installation that includes a housing

Claims (2)

20 a settling tank with a whirlpool chamber and a swirler made in the form of arcs and perforated pipelines, a float, a baffle plate, a scraping foam collecting mechanism, a sludge cutter and pipelines, a slug slugging unit made in the form of spring-loaded segments, spaced under the baffle board and pneumatic cylinders with the rods interacting with the segments, while the swirl arcs are not of the same length; FIG. 1 shows a functional diagram of the device; in FIG. 2 - Wi A on (1) ig.1; FIG. 3 is a section BB in FIG. The wastewater treatment plant is a prefabricated structure consisting of a body 1 of cylindrical form and a bottom 2 inclined to a central discharge port 3 to which pipe k is connected to remove sludge. In the internal cavity of the housing 1, coaxial to it, an annular partition 5 is installed, hermetically reinforced in the lower part to the bottom. Between the housing 1 and the partition 5 there are two radial walls 6, which divide the annular space of the housing into a pocket 7 for draining purified water and a foam receiver 8. Part of the annular partition 5 in the pocket zone 7 is equipped with an overflow threshold 9 with a guide plate serving to adjust the level wastewater installation. In the upper part of the partition 5, a pallet 10 is installed, in which the foam collecting mechanism P is located, for example, a chain structure with scrapers. The front wall 12 of the pallet 10 is submerged under the liquid level in the installation and serves to prevent flotopenes from entering the pocket 7. The concentric partition 5 inside the installation |) telescopically manufactured whirlpool chamber 13 whose lower part is equipped with a damper grate I for eliminating the vortex motion of the fluid at the exit cameras. A settling tank 15 is located between the partition 5 and the wall of the whirlpool chamber 12 and the bottom of the latter. For better distribution of water over the cross section of the settling tank 15 and preventing sedimentation from stirring up, the reflective layer is provided in the lower part. A vertical telescopic pipe 17 passes through the central part of the housing 1, the lower part of which contains a mixture of sewage with coagulum and 7 On the upper part of the pipe 17 by air. swirl 18 is installed, made: ny in the form of a stationary segner wheel, equipped with perforated pipes 19, located along the generator of the swirl chamber 12. To adjust the swirler 18 relative to the liquid surface in the installation serves element 20, for example, a threaded extension it, d, equipped with tangential holes 21 for uniform discharge of jets of a mixture of water, air and coagulum and their orientation tangential to the inner wall of the whirlpool chamber 13. In the upper part dovorotnoy reinforced inflatable float chamber 22, for example made of rubber in the form of a hollow hub 23 of the spider 2. The air in the float 22 enters through the nozzle 25 from a source of compressed air. Perforated piping 19 swirl 18 reinforced on hollow arches 26 of different lengths. In the lower part of the reflective shield 16, a pallet 27 is reinforced, forming together with the first a box-like structure of a sludge separator device, inside of which sectors 28, springs 29 and pneumatic cylinders 30 are located. Rods 31 of pneumatic cylinders 30 in the initial position enter shoulders 32 and fix sectors 28 from the radial movement. The initial mixing of the coagulant with air takes place in the mixing chamber 33, which is in fluid communication with the ejector 3, which is installed on the pipeline 35 for the discharge of wastewater from the pump unit (not shown). Adjustment of the amount of water entering the purification into the mixing chamber 33 and after it for recycling is performed by valves 36 and 37, respectively. The thin pipelines outside the circuit circuit in figure 1 show the process pipelines, the remaining lines with arrows show the flow path installation chambers, the device operates as follows. Purified wastewater is supplied under pressure to the ejector 3, where the wastewater is mixed with air and coagulant, coming from the mixing chamber 33. The mixture moves through the pipe 17 into the swirl 18, jets from it, has flowed out of the perforated pipe 19, is twisted and uniform mix the liquid in the whirlpool chamber 13, which is in the collapsed state in the lower part of the settling tank 15. As the last water is processed, the whirlpool chamber emerges (the float 22 is pumped with air) until it reaches the maximum level filling, thus creating optimal conditions for flocculation and agglomeration of small flakes into large ones. Air dissolved in water is released in the form of shallow bubbles, and it floats the shallow water and oil products in the drains, which move to the water surface of the heel chamber 13 and sediment trap 15. Mechanical impurities and large flakes formed at the outlet of chamber 13 and the settling tank 15 is deposited in the conical silt, from where it is periodically diverted for further processing. Purified water from the sump 15 flows through an overflow threshold 9 installed below the water-foam phase separation level into a pocket 7, from where it is taken for reuse into the circulating water supply system. Foam from the surface of the water is removed by means of a scraper device for collecting foam 11 into the foam receiver 8, where it is decanted. At the moment of filling part of the settling tank 15 with sediment, air is supplied to the level of the baffle plate 16 in the cavity of pneumatic cylinders 30 and rods 31 release the shoulders 32 of sectors 28 and the latter are moved radially by the action of springs 29 to contact the partition 5, thus the compartment of purified water. Next, the air from the float 22 is compressed and the whirlpool chamber, moving down, presses the sludge separator and moves with it to the neck 3, squeezing the sediment out of the installation. Sectors 28 on the conical surface of the bottom 2 and in the cylindrical neck 3 are returned to their original position, overcoming the force of the springs 29. In the lowermost position of the pallet 27, the cylinder rods fall behind the shoulders 32 of the sectors 28, after which air is blown into the float 22, inflates it and raises the system; the whirlpool chamber - the device for cutting off the sediment to the upper position. In the proposed device, better mixing of waste water with coagulum in the whirlpool chamber, as well as a higher degree of sludge dewatering and its removal without stopping the operation of the device, occurs. The invention includes a sewage treatment plant comprising a cylindrical body, a sump with a whirlpool chamber and a swirler made in the form of arcs and perforated pipelines, a float attached to the whirlpool chamber, a baffle plate, a scraper picker, a sludge cutter and process piping, the fact that, in order to increase the efficiency of the installation in operation, the device for cutting off the sediment is made in the form of spring-loaded segments placed under the reflective shield , and pneumatic cylinders with rods interacting with segments, while the swirl arcs are not of the same length. Sources of information taken into account in the examination 1. USSR author's certificate for H 2903 87/26, class C. 02 F 1/2, 11.0.80. cpuQ .; /;