SU1511213A1 - Thin-film settling tank - Google Patents

Abstract

The invention relates to the field of industrial wastewater treatment, in particular to wastewater treatment from oil and mechanical impurities, and can be used for wastewater treatment in the refining, petrochemical and other industries. The aim of the invention is to increase the cleaning efficiency. The thin layer settling tank for sewage treatment includes a housing, chambers: receiving, settling and oil sludge, upper distributing device, thin layer block, lower distributing device, sludge bunker, supply pipeline, discharge pipe. The sump is equipped with pipelines for discharge of oil sludge and sediment, the upper and lower distribution devices are made in the form of corrugated partitions with longitudinal slots in the valleys of the corrugations of the upper partition and protrusions of the corrugations of the lower partition, and the ratio of the slit area of the upper partition to the slit area of the lower partition is 0.1- 0.2. The use of the proposed sump provides increased cleaning effect, increased productivity and stable hydrodynamic operation. 1 hp ff, 4 ill.

Description

The invention relates to the treatment of industrial wastewater, in particular to the treatment of wastewater from oil and mechanical impurities, and can be used for the treatment of wastewater in the refining, petrochemical and other industries.

The purpose of the invention is to increase the cleaning efficiency.

FIG. 1 shows a sump, longitudinal section; in fig. 2 - upper water distribution device; in fig. 3 - lower switchgear; Fig, 4 - sump, axonometrics.

The thin-layer settling tank for wastewater treatment includes a housing 1, a reception 2, a settling tank 3 and oil sludge 4 chambers, an upper distribution device 5, a thin-layer block 6 in the form of parallel inclined plates installed in the direction of flow of the liquid to be cleaned, the lower distributor

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The device 7, the bunker 8 of the sediment of the pipelines, the withdrawal of the hydraulic-pipe pipeline 10, the sump is also equipped with pipelines for the withdrawal of ggefteshm - 11 and sediment 12.

The upper 5 and lower 7 distributors tel1e devices were made} 1 in the form of corrugated partitions 13 and 14 with longitudinal slots 15 and 16 in the valleys of the corrugations of the upper partition 13 and protrusions of the corrugations of the lower partition 14j, and the area ratio n (spruce 15 of the upper partition The 13 x area of the slots 16 of the lower partition 14 is 0.1-0.2. Switchgears 5 and 7 are placed parallel to the upper and lower edges of the plates of the thin-layer block 6, respectively, at an angle of 30-60 to the horizontal.

The sump works as follows.

The wastewater is cleaned through pipeline 9 to the receiving chamber 2, where the initial volumetric flow redistribution occurs in the space bounded by a distributor 5. The uniform distribution density of the water flow is caused primarily by the distribution valve.

In the zone located above the upper distributor 5, there is a circulation movement, which promotes the mixing of the liquid, preventing the gravitational separation of the mechanical phases that are part of the waste liquid,

Then, the water, the passage of the upper distributing device 5 enters the thin layer block 6, where the gravitational clarification of the liquid occurs.

Due to the fact that the selection of CLEANING € NDA

water is concentrated in a certain place of the sump body; the outflows of the tok water from the interlaminar space occupy an unequal position; The equidistant outflow of water from non-vegetation space creates additional factors causing the sensitivity of the water distribution system. A necessary condition for the equal distribution of the water flow in a thin layer block is the introduction of additional resistance in the flow path coming out of the thin layer block; it is this that contributes to preventing a change in water separation on the interplate platelet.

The additional condition of jiaBHOMepathic distribution of flow rates in the interplatelet space is coo THomt HHe; d-: in- resistance of the upper lower water distribution devices, and the name of the ratio of su 1 ary ptsha / gay vienefl, If the ratio is ruiom4j4ct4jr, Iyyyyyyy device to the area of the lower slots is equal to or greater than one unit), in the interstrate space} 1ab: there are careful currents that weaken the rate of coefficients (Li11, tent of useful use of L volume; 1I.0 /; provide an increase in the turbulence in the interlamellar pros faggstve ukaza1 currents are interfere tstvltot effective gravitational rubric phase po- lidisperstnogo stream

Optima the mode of operation of the thin layer block corresponds to the ratio of the areas of the throughput slits in the range of 0.1-0.2. This ratio allows you to create a voltage zone in the thin layer Ghchok, yyr), which leads to the absorption of liquid in the space limited by the distribution device.

Sz mmariya the throughput area of the upper water distribution device is 2-5% of the living interchalar section of the plate,

Throughput slots, placed in the switchgear, create a jet flow movement. The quenching of jetting and flow into the laminar mode is achieved by the frequency of the spacing and the distance between the distribution devices and the edges of the plates of the thin-layer block. Determining the jet outflow zone and transferring it to the lacquer flow by mixing the Hbiix current jets allows identifying structural parameters of the distribution part and its geometer; adic; The termination of the jetting and laminar flow to the intersciplinary block can be achieved by keeping the following ratio –t – 0.7j where a is the distance between the holes, 1

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between the distribution device and the thin layer block.

The mechanism of accumulation and removal of products of the gravitational section is concluded in the design of water distribution systems. The corrugated cross-sectional shape of the switchgears allows the products of the gravitational section to be accounted for in the corrugations, and the angle of inclination of the devices 30-60 contributes to the relocation of the indicated products in the collection-accumulation system.

The location of the gaps in the valleys of the corrugations of the upper switchgear and in the protrusions of the corrugations of the lower device is determined by the nature of the accumulation of products of the gravitational section, which is expressed by the hydraulic particle size. In the first version, particles with hydranpical size less than one, in the second more than one 19,

Sewage water, more easily, the gravity clarification stage after the lower distribution device 7, is removed along the pipeline - ay 10, soils, the nose is thicker than particles with a hydraulic size less than that, accumulated in the system of the upper device 5 and sent to the chamber 4 sludge from where the pipeline 11 is removed for subsequent processing. The impurities, bearing the character of particles with a hydraulic size greater than one, accumulate in the corrugations of the lower distribution device 7 and slide into the bunker 8 of the sediment, from where

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removal to the dewatering system through the pipeline 12.

Thus, the use of the proposed thin-layer settling tank for wastewater treatment provides, in comparison with the known method (the prototype has the following advantages: an increase in the cleaning effect, an increase in the capacity of the plant, a stable hydrodynamic mode of operation.

Claims (1)

Invention Formula 1 "A thin layer settling chamber containing chambers: receiving, settling and oil shams, a thin layer separation unit in the form of parallel inclined plates installed in the direction of flow of the liquid to be cleaned, a sludge bunker supplying and discharging piping, characterized in that efficiency1) of the cleaning process, it is equipped with upper and lower distribution devices in the form of corrugated partitions, made with longitudinal slots in the valleys of the corrugations of the upper partition and protrusions of the corrugations of the lower partition, The ratio of the slots of the upper partition to the area P5 of the lower partition is 0.1-0.2, and the thin-layer block is located between the upper and lower distribution devices. 2, The sump according to claim 1, about tl and h ayu y and so that the distribution devices are placed parallel to the upper and lower edges of the plates, respectively, at an angle of 30-60 ° to the horizontal. Cpijff. l (rir.Z