SU919999A1 - Waste water purifuing device - Google Patents

Description

one

The invention relates to devices for the flotation treatment of industrial wastewater containing petroleum products and may find application, for example, in the chemical, petroleum refining industry. batting industry.

The closest in technical essence and effect achieved is a flotation device for water clarification, comprising a housing, a device for removing foam, adjacently arranged mixing, reaction, flocculation chambers with a device for introducing a water-air mixture and a flotation chamber equipped with a thin-layer separation unit L11.

A disadvantage of the known device is the low efficiency of use of the working volume in the zone of clarification, due to the presence of turbulent flows in it, and as a result of this, the water load on the device is low.

The purpose of the invention is to increase the performance of the flotation cell without reducing the quality of the purified water.

This goal is achieved by the fact that in a device comprising a housing, a device for removing foam, adjacent mixing chambers.

flocculation reactions with a device for introducing a water-air mixture and a flotation chamber equipped with a thin-layer separation unit. the flocculation chamber is provided with inclined plates located in its upper part adjacent to the wall of the flotation chamber. At the same time, the elements of the thin section 10 unit are located throughout the entire section of the flotation chamber and are located at a right angle to the plates of the flocculation chamber.

The drawing shows the proposed device, a general view. .

The device consists of a housing 1 with a set of uneven transverse partitions 2, 3 and 4, forming interconnected chambers of mixing 20 and 5, reaction b, flocculation 7, flotation 8. In the displacement chamber 5, partitions 9 are installed across the water flow, changing the direction of water movement with reagent. The float-forming chamber 25 is equipped with an adaptation 10 for introducing air saturated with water and a thin-layer separation unit 11 with a continuous flow of fluid and floated particles,

Claims (1)

30 and this block is located above the n-section 4. The flotation chamber 8 is provided with a block 12 of a thin-layer section with no countercurrent movement of the liquid and the particles to be floated. The proposed device is equipped with a device for removing foam with a scraper mechanism 13. The elements of the thin-layer separation unit of the flocculation and flotation chamber are located at a right angle to each other. The transverse partition 3 is provided with a slit 14 located below the level of the water outflow saturated with air. The device is equipped with a hopper 15 with a bypass channel 16. The device operates as follows. The waste water enters the mixing chamber 5. From the mixing chamber, the purified water enters the reaction chamber 6, into which coagulum hydrolysis occurs and adsorption of metals containing 5 water onto the surface of the hydroxide flakes. The resulting flakes with impurities then enter the flocculation chamber 7, in which the metal hydroxide flocates form and the coagulated water stream mixes with the recirculation stream of air-saturated water entering through the device 10. The water flow flowing out of the flocculation chamber 7 in the turbulent mode Into the flotation chamber 8 through the channels of the block 11 with the continuous flow of the liquid and float of the first particles and further in the flotation cell. through the channels of the block 12 with countercurrent movement of the fluid and the floating particles. The mode of motion in the blocks changes from turbulent to laminar due to the separation of the flow into channels. The flotation separation of dispersed particles with adherent Ki air bubbles begins as early as in block 11, but is especially intensive in block 12. With the flow of wastewater from block 12 from top to bottom, a high degree of purification from colloidal impurities and suspended substances is reached to 98- 99%. The purified water moves along the channels of block 12, and the upward flow of a mixture of dispersed particles with adhered air bubbles rises and moves under the inclined surface of block 12. The contaminants from the surface of the device are removed by the scraper mechanism 13 into the bunker 15, from where the slurry is drained through the outlet pipe. Purified water, passing through a narrow channel 16, is discharged from the installation. The preliminary arrangement of the blocks in the proposed wastewater treatment apparatus allows flotation at high speeds of fluid movement, i.e. hydraulic loads up to 80, while ensuring maximum cleaning effect from colloidal and suspended impurities, which can be coagulated and removed from the water by flotation. The use of the invention allows to intensify the process of wastewater treatment by increasing the hydraulic loads 3.75-6.6 times as compared with the known, and compared with the existing (operating) flotation devices without blocks 12-16 times, since their hydraulic load usually less than 5 hours. The economic effect from the introduction of the invention is 193.3 thousand rubles. Claims A sewage treatment apparatus comprising a housing, a device for removing foam, adjacent mixing chambers, reactions, flocculation with a device for introducing a water-air mixture and a flotation chamber, equipped with a thin-layer separation unit, characterized in that, in order to increase the performance of the flotator without reducing the quality of purified water, the flocculation chamber is provided with inclined plates located in its upper part adjacent to the wall of the flotation chamber, while ementy thin layer separation unit placed around the section of the flotation chamber, and disposed at right angles to the plates flocculation chamber. Sources of information taken into account in the examination 1. Mogheap F.Serpaf to 2.a solution originate depuration des eax pa, peteries, - Papeterie; 1975, 97, No. 5, 281-286 (prototype). "