SU1446114A1 - Structure for purifying waste water from petroleum products and suspended matter - Google Patents

Description

(21) 4286290 / 29-26

(22) 1707.87

(46) 12/23/88. Bul 47

(71) State Design Institute Soyuzvodokanalproekt and All-Union Scientific Research Institute of Railway Transport

(72) N.F.Reznik and F.M.Git

(53) 628.314.2 (088.8)

(56) USSR Author's Certificate No. 1116015, cl. C 02 F 1/24, 1983.

(54) CONSTRUCTION FOR CLEANING WASTE WATER FROM PETROLEUM PRODUCTS AND SORTERS

(57) The invention relates to a facility for the treatment of waste water from petroleum products and suspended solids and can be used to treat oily drains by settling

and flotation using mechanisms for mixing wastewater with reagents and collecting petroleum products and sludge. The purpose of the invention is to intensify the cleaning process by providing settling and flotation in one structure. The construction comprises a reservoir Jj of chambers 2,3 and 4 flocculation, flotation and sedimentation, zone 5 of additional sedimentation, pipe 8 for introducing raw water, foam collection tray 12, pipe 19 for introducing water-air mixture, as well as pipes 22 and 23 for draining purified water and oily foam. Sewage water with reagents through pipe 8 enters chamber 2. Sooth flakes and slurry are deposited in chamber 4, and water is directed into the flotation chamber 3, where it is mixed with the water / air mixture entering through pipe 19. The foam that forms is removed through pipe 23 , and purified water - through the pipe 22. The invention allows to reduce the volume of the structure and increase the coefficient of its volumetric use, as well as to intensify the process of settling. 1 z.p, f-ly, 2 ill. 15

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The invention relates to constructions for cleaning oily wastewater by sedimentation and flotation using mechanisms for mixing water with reagents and collecting petroleum products and sediment.

The purpose of the invention is to intensify the cleaning process by ensuring settling and flotation in one battle.

Figure 1 presents the structure, General view; fig 2 is the same, top view.

The wastewater treatment plant comprises a reservoir, a sludge chamber 2, a flotation chamber 3, a sedimentation chamber 4 for separating the coagulated and coarse suspension, a zone 5 for additional sedimentation to release small air bubbles with contaminants, defoaming the partition 6, flooded a partition 7 for separating the zone of additional settling from the settling and flotation chambers. The structure also contains a pipe 8 of the input source water with reagents, the distributor 9 source water,. made of horizontal pipes with nozzles 10 raised up not. more than 15, scrapers 5 for scrapping foam, foam collecting tray 2, stirrer 13, vertical drive | Ga: e J4 of different lengths and diameters, on which scrapers are fixed, distributors and agitators, J5-J7 motor gearboxes for individual drive of shafts, annular catchment tray 18, water-air mixture inlet pipe 9, distributor 20, air-air mixture,. made of horizontal pipes with nozzles 21 raised not less than 15 °, pipes 22 and 23 of the removal of purified water and oil-containing foam, scrubbers 24 bottom to collect and remove sediment and pipe 25 to empty the tank.

The nozzles on the distributors are set at an angle to the horizontal plane.

the bones are directed upwards to the central axis of the structure, which ensures optimal distribution of water and water-air mixture over the horizontal section of the chambers by increasing the length of the jets.

The introduction of the initial water into the flocculation chamber in the form of jets directed upwards ensures complete

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15

20 25 30 about 0

five

using the volume of the upper part of the chamber and additional mixing of water with reagents as it moves downward due to the rotation of water distribution pipes with nozzles.

The direction of the jet upwards when supplying the water-air mixture, in addition to optimizing the water distribution, ensures its introduction only into the concentric flotation chamber.

The construction works as follows.

Sewage water together with reagents by gravity or by means of a pump is supplied through pipe 8 through distributor 9 of source water to the upper part of chamber 2 of flocculation and is evenly distributed over the cross section of the chamber. When moving downward, the blades J3 are additionally mixed with reagents for 8- 10 min. Heavy flakes and coarse slurry are deposited in the settling chamber 4 and then removed by the scrappers 24.

The bottom of the water enters upward into the flotation chamber 3, located above the settling basins 4. The lower part of the horizontal section through the second distributor 20, rotating freely due to the jet reactive force in the direction opposite to the movement of the blades of the agitator, is introduced into the air mixture, from which air bubbles emit and float with particles of contaminants adhering to them. This is facilitated by the slow and uniform upward movement of water. Then the water through the submerged partition 7 enters the zone 5 of additional sedimentation, moving from top to bottom, is freed from small air bubbles with adhering contaminants.

This lag water passes under the suspended foam retaining partition 6, is poured into the catchment tray 18 and further along the pipe 22 enters the tank of purified water. One of the tank - part of the water is taken by the pump for recirculation to fill it with air and supply it to the air / air distributor, and the other part is sent for technical needs or for further purification.

Splash foam and petroleum products from the surface of the water using a scraper mechanism 11 continuously discharge

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vayut in the radial sump pan 12 and discharged through the pipe 23. Accumulated on the bottom of the building sludge raked bottom scrubbers 2A in the IC and then sent to sludge plots,

In the structure, a repeated change in the direction of water flow up and down occurs, which provides an intensive sedimentation of a coagulated suspension in a sump and the bubbling of air bubbles up, Part 1 with adhering contaminants in the flotation chamber and the zone of additional settling.

By optimizing the processes of coagulation, mixing, flocculation and uniform distribution of water at each stage of purification, the volume of the apparatus is significantly reduced and the coefficient of its volumetric use increases.

Claims (2)

Invention Formula J. A facility for the treatment of waste water from petroleum and suspended weights containing a tank, flocculation and flotation chambers, a stirrer, a feed water supply unit and an air / water mixture with nozzles, scrubbers to remove h in P tn 44 foams and sediments .J differing from the fact that, in order to intensify the cleaning process by ensuring settling and flotation in one building, the flocculation and flotation cells are concentrically located, the building is equipped with a settling chamber located in the lower part of the flocculation and flotation cells, the source water supply unit and the air / air mixture are made in the form of two distributors located on the same axis, the source water distributor is located in the upper part of the flocculation chamber, the water distributor Ear mixture located in the upper portion of settling chamber, nozzles in each of the distributors are set at an angle to the horizontal plane and directed upward toward the central axis structures, wherein the nozzles on the water-air mixture distributor arranged at its ends by flotation chamber, 2. The construction according to claim 1, wherein the I ' s is such that the distributor of the air-water mixture is rotatably mounted by the jets of aerated water exiting through the nozzles. and And yy 20 t1