SU1242203A2 - Apparatus for purifying water - Google Patents

Description

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This invention relates to devices for the purification of natural waters and a dog for treating waste liquids and can. to be used mainly in the purification technology of household water.

The purpose of the invention is to increase the productivity of the device by improving the flocculation process.

The drawing shows the device, a longitudinal section.

The device includes a housing 1, inside of which a conical mixer 2 and a cylindrical chamber 3 are coaxially arranged. The mixer 2 is equipped in the lower part with a bell 4, which forms an ejector system with the source water supply pipeline 5. To one of the side walls of the housing, on the outside, a precipitator 6 abuts, communicating with the internal cavity of the housing by means of openings 7 located in the side wall of the housing. The holes 7 are provided with protective visors 8. In the upper part of the body 1, there is an annular groove 9 connected to the pipeline 10. In the upper part of the precipitate of the compactor 6 there is a perforated hole.

The pipeline 11, and in the lower - the pipeline 12 to discharge the sediment. The source water supply pipe 5 is connected to the pipe-driver 13 for emptying the device.

The upper part of the mixer 2 is provided with perforations 14, the ratio of the length of the perforated part of the mixer to its total length being 0.2-0.4, and the total area of perforation in the upper part of the mixer is 0.3-0.6 of the cross-sectional area at the mark of its upper edge.

The device works as follows.

The initial water, into the necessary reagents introduced into it, is fed into the lower part of the device via pipeline 5. Thanks to the ejected system formed by the socket 4 and pipeline 5, part of the already formed sediment enters the mixer 2 together with the initial water. From the mixer 2, the initial water, displaced with the necessary reagents and part of the sediment that has already formed, enters the chamber 3 in flocculation both through the perforation 14 and through the upper edge of the mixer 2.

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This posture of water into the flocculation chamber leads to a shift in the coagulation process from spatial structure formation to autocatalytic coagulation, sorption and adhesion.

This is due to the fact that from the mixer 2 to the chamber 3, the flocculated purified water flows in height at different levels. As a result, in the upper part of chamber 3 flocculation takes place interaction and adhesion of heterogeneous particles, significantly differing in their size. A distinctive feature of this process is the increased speed and completeness of the extraction of small particles of large particles from water, i.e., the intensification of flocculation.

As a result, the density of the newly formed flakes increases and, accordingly, their hydraulic size. There is also an increase in the mass and volume concentration of the layer of suspended sediment, which affects the surface area of sorption and adhesion. Thereby, the physicochemical conditions improve, which have a direct impact on the process of water purification, the productivity increases and the quality of water purification improves.

The hggy, the exit from chamber 3, is quite well precipitated. A part of the sediment (as indicated) is ejected and, together with the source water, enters the mixer 2, and a part of the sediment in the space between the housing 1 and chamber 3 forms flocculation zone (suspended sediment).

The water, in which the smallest sprouts remained, the passage through the weighed sediment zone formed by the well-formed large flakes, is purified.

The clarified water is collected by an annular chute 9 and is led through line 10 to filter.

The upper boundary of the layer of suspended sediment is maintained almost at the same level by continuously passing through a portion of the sediment through the holes 7 into the sediment seal. Body 6. The amount of overflow 55 sediment is regulated by the degree of opening of the valve on the pipeline II, i.e. the amount of clarified water discharged from the precipitator 6.

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The compacted sediment from sediment stranded filaments 6 is discharged through the pipeline 12..

. If necessary, the device can be emptied with open valves on pipelines 12 and 13 and a closed valve on pipe 5.

Testing of the proposed device is carried out in experimental conditions. In this case, the water being purified is characterized by the following indicators: suspended matter content is 170–200 mg / l, chromaticity is 60–0 degrees, alkalinity is 4.6–4.7 eq / l, temperature is 2.5–.

Before serving on the proposed device, the purified water is coagulated. In all series of experiments, the dose of coagulant is 53–13.5 mg / l (according to AljO), the flow rate of water in the layer of suspended sediment is 1.4–1.5 mm.

How. show the complete research, the proposed technical, when the ratio of the length of the perforated part of the mixer to its total length of 0.2-0.4, allows to obtain clarified water, which, according to the suspended matter content, meets the requirements of GOST b.p. water with suspended matter content 1.1-1.5 mg / l.

In this case, the concentration of the solid phase in the lower part of the layer of suspended sediment is 3300-3600 mg / l.

When the ratio of the length of the perforated part of the mixer to its total length is less than 0.2 or more than 0.4, the operation of the device deteriorates, since the content of suspended solids in

Compiled by L. Sukhanova Editor N. Dankulich Tehred M. Khodanich Proofreader M. Demchik

Order 3640/10 Edition 663Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Design, 4.

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clarified water is increased to 1.8-2.5 m / l. The concentration of the solid phase in the lower part of the layer of suspended sediment decreases to 2600-2800 mg / l.

Additionally, extensive studies show that the best results on water purification with a device are provided with a ratio of the total perforation area in the upper part of the mixer to the cross-sectional area of the mixer at its upper edge of 0.3-0 ,.

The ratio of suspended solids in clarified water is 1.1-1.2 mg / l.

Changing the reduced ratio to decrease or increase results in an increase in the suspended matter content in clarified water.

At the same time, tests of a known device performed under similar conditions show that the content of suspended substances in clarified water in the range of 1.1-1.5 mg / l can be obtained with a flow rate of water in the layer of suspended sediment not exceeding 1.1 mm / s. . At high flow rates, the clarification quality deteriorates. So, at an upflow rate in the layer of suspended sediment of 1.4-1.5 mm / s, the content of suspended substances in clarified water increases to 3.5 mg / l.

Thus, the technological and technical-economical advantage of the proposed device is an increase in its productivity in comparison with the known by 25-35% with the same quality of water clarification.

Claims (2)

1. DEVICE FOR PURIFICATION OF WATER by ed. St. No. 1017363, distinguished. the fact that, in order to increase its productivity due to the process of flocculation, the upper part of the mixer is perforated when the ratio of the length of the perforated part of the mixer to its total length equal to 0.2 - 0.4. 2. The device according to π. 1, characterized in that the total perforation area in the upper part of the mixer is 0.3-0.6 of the cross-sectional area of the mixer at the mark of the ith upper edge. 1 1242203