SU443844A1 - The method of purification of natural water - Google Patents

Description

one

The invention relates to the field of purification of natural water to obtain drinking water from it.

A known method of purifying natural water, which results in the removal of suspended matter and colloids from it, consists in treating the raw water with known coagulants, such as aluminum sulphate, followed by precipitation of the solid phase and its separation by filtration.

This method is characterized by the duration of the clarification process (1.5 hours) and a low degree of clarification (residual turbidity of 8–15 mg / l).

The proposed method is characterized in that the separation of the solid phase is carried out by contacting the water directly after coagulation with throttled water supersaturated under pressure of 5-7 atm for no more than 20 minutes.

This provides a reduction in the duration of the clarification process by 4.5 times and an increase in its effectiveness (residual turbidity of water is 3 mg / l).

The drawing shows an installation for carrying out the proposed method.

The original natural water (40) treated with coagulants, for example, A12 (504) s (15 mg / l), is fed to a coagulation tank, s

2

which takes about 1-2 minutes in the process of formation. Water with flakes from 1 is contained in tank 2. About 10 j of the total amount of purified water (4 m / h) is taken by pump 3, displaced with air in ejector 4, and iodine is saturated with iodine 5-7 atn in a saturator 5 where the working pressure is regulated by a safety valve.

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Undissolved air is separated, remaining at the top of the saturator. In the lower part, a large amount of pressurized water containing dissolved air (so-called dispersive water) is collected. The amount of air dissolved depends on the duration of the saturation, the pressure n on the temperature of the water. For effective clarification of natural water, the minimum saturation pressure should be 5-7 atp. The water level in the saturator depends on the installation height of the ejector and is controlled by the valve on the ejector.

11z of the saturator 5, the air-saturated dispersion water (4) is fed through a regulating valve 6 into the tank 2, in which OT1P c.g is shipped with coagulated water.

For a better distribution of the diversified water, it is drained through a distribution pipe with nozzles 7 in the lower part of the tank 2.

3

The elevation surface of the reservoir tank is removed by a continuously growing horizontal ribbed cylinder 8 into the drain pipe. Under these conditions, the clarification effect in the fluorescent light reaches 90%, and the residual turbidity of the water does not exceed 3 mg / l. The effectiveness of a known clarifying method is 70-80%. The length of the clarification of the proposed method is about 20 minutes, i.e., 4.5 times less than with the clarification method used so far. The capacity of the water treatment plant increases accordingly.

The clarified water is passed through peyouch fast filters 9.

Subject invention

The method of purification of natural water by coagulating it with subsequent separation of the solid phase, characterized in that, in order to improve the efficiency of purification and intensify it, the separation of the solid phase leads to contact of water directly and after coagulation with throttled water unsaturated under pressure of 5-7 at. more than 20 min.

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