RU157474U1 - WATER TREATMENT DEVICE - Google Patents

Abstract

1. A device for producing purified water, comprising a housing divided by at least one vertical partition into chambers communicating with each other through the bypass holes in the partitions, of which at least one chamber is a working chamber and the other is a precipitator, and the working chamber equipped with an ejection system located in its lower part, characterized in that in the upper part of the chambers above the bypass holes there are immersion membranes connected with the purified water discharge pipe. 2. A device for producing purified water according to claim 1, characterized in that thin-layer modules are installed in the upper part of the chambers in the space between the lower part of the immersion membranes and the upper edge of the bypass holes.

Description

The utility model relates to devices for purifying natural waters and purifying wastewater from suspensions and can be used, in particular, at wastewater treatment plants in water purification technology for household and drinking purposes.

Widely known are devices for purifying water from suspensions, including a housing divided by one or more vertically mounted partitions into chambers, of which at least one is operational and the other is a sediment compactor. Moreover, these cameras communicate with each other through the bypass holes in the partitions [V.A. Klyachko, N.E. Apeltsin. "Purification of natural waters." - M .: Publishing house of literature on construction, 1971, p. 166-168]. So, it is known a device for water purification, including a housing, inside which the mixer is coaxially located, a chamber, inside which the mixer is coaxially located, a flocculation chamber and a system for recirculating sludge and sediment, communicating with the cavity inside the housing through the bypass hole [Karelin J.A. . Wastewater treatment of oil fields and factories., M., Gostekhizdat, 1959, p. 216].

Known devices are ineffective, especially when cleaning low turbid colored water in the winter, when the flocculation process is very sluggish, and the formed flakes are characterized by small size and low hydraulic size.

As a result, the liquid being cleaned, being filtered through a layer of flakes suspended in the upward flow of water, formed in the working chamber of the device, is slightly clarified, as a result of which its subsequent post-treatment with quick filters is required. This leads to the necessity of using fast filters, occupying large areas, which leads to a significant deterioration of the technical and economic indicators of the water treatment process in schemes where widely known devices are used. In addition, due to the high mud load that comes to quick filters, their performance is reduced, and the water consumption for regeneration of the load in them (i.e. unproductive water losses) reaches 15-20% or more.,

The closest to the proposed technical essence and the achieved effect is a water purification device comprising a housing divided by one or more vertically mounted partitions into chambers, of which at least one is a working one and the other a precipitator. Moreover, these chambers communicate with each other through the bypass holes in the partitions, and the working chamber is equipped with an ejection system located in its lower part [SU 1017363, 1983].

This device in comparison with the ones considered above provides a much deeper degree of water purification, primarily due to the fact that the ejection system contributes to the formation of flakes with a larger hydraulic size. The latter circumstance, in turn, leads to the fact that in the working chamber the concentration of flakes suspended in the upward stream of purified water increases significantly, passing through a layer of which the purified water is clarified to a greater extent than in known analogues.

At the same time, the degree of water purification taking place when using this device also does not allow us to abandon the need for its final purification using quick filters. Although due to the arrival of much cleaner water on the filters, their productivity increases, and the water consumption for regeneration of the load in them decreases, as a rule, to 5-7%.

The technical task of the proposed technical solution is the development of such a compact device, which would reliably make it possible to obtain water of household-drinking quality while reducing water consumption for own needs and reducing the area of treatment facilities at the station.

The technical result is that in a device for water purification, comprising a housing divided by at least one vertical partition into chambers communicating with each other through the bypass holes in the partitions, of which at least one chamber is a working chamber and the other is a precipitator, moreover, the working chamber is equipped with an ejection system located in its lower part, characterized in that in the upper part of the chambers above the bypass holes there are immersion membranes connected to the discharge pipe purified water. In this case, it is optimal to install thin-layer modules in the upper part of the chambers in the space between the lower part of the immersion membranes and the upper edge of the bypass holes.

In FIG. 1 shows a cross section of a device where the following notation is used: 1 - housing; 2 - a partition; 3 - bypass hole; 4 - a working chamber; 5 - sediment compactor; 6 - ejection system; 7 - pipe with nozzle; 8 - pipeline supply of water with reagents; 9 - a mixing tube; 10 - bell mixing tube; 11 - reflector; 12 - immersion membrane; 13 - pipeline drainage of purified water; 14 - thin layer module; 15 - sediment discharge pipe.

The device has a housing 1, divided by a vertically mounted partition 2, equipped with bypass holes 3 into chambers, one of which is a working 4, and the other a precipitation seal 5. The lower part of the working chamber 4 is equipped with an ejection system 6 formed by a nozzle with a nozzle 7 in communication with the pipeline water supply for cleaning 8 and a mixing pipe 9 with a socket 10 at the end, coaxially located above the nozzle with a nozzle 6. Above the mixing pipe 9 is mounted a conical reflector 11. In the upper part of chambers 4 and 5 above ur A plurality of overflow openings 3 are equipped with immersion membranes 12, which are in communication with the piping 13 for discharging purified water from the device. In the lower part of the chamber 5 is located the drainage pipe sediment 15.

In the upper part of the chambers 4 and 5, in the space between the lower part of the immersion membranes 12 and the upper edge of the bypass holes 3, additional thin-layer modules 14 can be installed.

The device operates as follows.

The source water with the reagents necessary for purification introduced into it is fed through a pipe 8 to the lower part of the working chamber 4. Due to the ejection system 6, equipped with a nozzle with a nozzle 7 and a socket 10, into the mixing pipe 9, a part of the previously formed flakes enters with the source water that play the role of centers of secondary flocculation. Due to this, the process of flocculation proceeds very intensively, and in the chamber 4 in the space between the lower generatrix of the reflector 11 and the bypass holes 3 a highly concentrated layer of suspended sediment is formed, filtering through which the water is partially purified. Excess sediment from the suspended layer is passed through openings 3 into the chamber 5, where it is deposited and periodically or constantly discharged through pipeline 15.

Further, partially clarified water passes directly to the immersion membranes 12, or first passes through the thin-layer modules 14, and then it is finally cleaned up on the immersion membranes 12, after which it is discharged through the pipe 13 to the clean water tank.

In turn, in the chamber 5, the water separated from the sediment passes through the thin-layer modules 14, and is finally purified on the immersion membranes 12 and then enters the pipe 13, where it is mixed with the water purified in the chamber 4.

The industrial applicability of the claimed technical solution is illustrated by the following example.

Example. Water from a surface source with a color of 250-270 degrees, a turbidity of 5.6-6.3 mg / L, oxidizability of 24.1-25.6 mgOg / L with microbial indicators: OKB 300-310 CFU / 100 ml, TKB 330-350 CFU / 100 ml, TBC 50-54 CFU / ml, is subjected to cleaning in a plant with a capacity of 1 m ³ / h, the scheme of which is given above. Three series of experiments are carried out, in each of which the initial water was pre-coagulated and flocculated. In this case, the dose of coagulant - aluminum sulfate was 19 mg / l (according to AL ₂ O ₃ ). and the dose of PAA flocculant is 04, mg / L. The ascending water velocity in the working chamber above the bypass holes was in the range of 0.75-0.80 mm / s.

In the first series of experiments, water was purified only through a layer of flakes suspended in an upward flow of water. In the second series of experiments, the flakes filtered in a layer of suspended in an upward flow of water were cleaned on hollow fiber immersion membranes. In the third series of experiments, before entering the hollow fiber membranes (see the second series of experiments), water was additionally passed through thin-layer modules.

The results of the experiments are shown in table 1.

From the results presented in the table it follows:

- the first series of experiments showed that the clarification of water in a layer of suspended sediment, although it provides a high degree of purification, however, does not allow reaching the indicators normalized for water intended for drinking and drinking water;

- the second and third series of experiments showed that the proposed device allows for seven indicators to obtain water suitable for household and drinking purposes;

- the presence of thin-layer modules in the installation provides additional water purification from fine suspension before it enters the membranes, which allows increasing the inter-flushing period of the latter by almost 30%.

The advantages of the proposed device in comparison with analogues are the possibility of exclusion from the technology of cleaning fast filters, which reduces the area occupied by equipment for water purification and a 5-7% reduction in water consumption for own needs.

Claims (2)

1. A device for producing purified water, comprising a housing divided by at least one vertical partition into chambers communicating with each other through the bypass holes in the partitions, of which at least one chamber is a working chamber and the other is a precipitator, and the working chamber equipped with an ejection system located in its lower part, characterized in that in the upper part of the chambers above the bypass holes there are immersion membranes connected with the purified water discharge pipe. 2. A device for producing purified water according to claim 1, characterized in that thin-layer modules are installed in the upper part of the chambers in the space between the lower part of the immersion membranes and the upper edge of the bypass holes.

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