RU8349U1 - FILTRATION-FLOTATION WATER TREATMENT PLANT - Google Patents

Description

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Installation for filtration and flotation water treatment

The utility model relates to the field of chemical engineering, in particular, to plants for the purification of natural and wastewater and can be used to purify natural and wastewater from heavy impurities and contaminants, for example, oil-containing.

Known installation for flotation treatment of water from heavy impurities by and.with. USSR No. 814878, MKI CO2F1 / 24.

This flotation unit contains a closed hydraulic line with sequentially connected the main flotation chamber, additional chamber, pump and saturator.

An additional flotation chamber is connected by a pipe to the outlet of the saturator. In the installation, a series connection of several additional flotation chambers is possible.

The disadvantage of this installation is the poor miscibility of water taken from the main flotation chamber and recirculated water taken from the outlet of the saturator in the additional flotation chamber. The consequence of this is the low degree of water purification, which will not increase with the introduction of additional chambers.

The closest solution to the claimed utility model is a plant for flotation water treatment according to s ... No. 94027775/25 of 07.25.94, MNC CO2F1 / 24. This installation contains a closed hydraulic line with a main flotation chamber and the possibility of sequentially connecting one or more additional flotation chambers, a recirculation water pipe, and a pump with an air ejector and a saturator; moreover, each previous flotation chamber is connected to a subsequent chamber via a liquid-type ejector liquid, the carrier fluid inlets of which are connected in parallel to the output of the saturator. In this case, the recirculation water pipeline connected to the main flotation chamber.

CO2F1 / 24

equipped with a liquid-liquid ejector, the intake of which is sucked in liquid is connected to the supply of purified water.

The known installation allows you to use only such a method of physico-chemical wastewater treatment, as flotation, which does not always provide the necessary degree of purification. The removal of purified water from such an installation is carried out in a gravity flow mode, which requires the installation of additional pumping equipment for transporting purified water to the place of use or discharge.

The proposed installation for filtration-flotation purification of water contains a closed hydraulic line with a main flotation chamber and the possibility of sequentially connecting one or more additional flotation chambers interconnected by liquid-liquid ejectors, a recirculation water pipe having an air ejector pump and a saturator, as well as supply of purified water.

New in the proposed installation for filtration-flotation water treatment is that filtration chambers are installed in the recirculation water pipeline, and the outlet for the purified water outlet of the installation is located in the pressure part of the recirculation water pipeline.

This solution allows to increase the degree of water purification, to expand its operational capabilities. To remove purified water from the installation and transport, no additional pumping equipment is required.

New in the proposed installation is that flotation chambers can be performed with two exits - one outlet is connected to the filtration chamber, and the other to the sludge sludge settling chamber, the outlet of which is secured water is connected to the supply of purified water.

New in the proposed installation is also that the flotation chamber can be interlocked with the filtration chamber, while the outlet for recirculating water from the flotation chamber is made in the form of a dividing wall, in the upper part of which holes of different diameters are located. This solution allows to reduce the dimensions of the installation, while in the filter chamber there is a uniform distribution of water over the entire area of the filters.

The figure 1 is a hydraulic diagram of the proposed utility model;

Figure 2 is an embodiment of a main flotation chamber interlocked with a flotation chamber;

In figure 3 - camera sludge flotation sludge.

The photo shows a general view of the proposed utility model.

The proposed installation for filtration-flotation water treatment (Fig. 1) contains a closed hydraulic line, which includes a recirculation water pump 1 with an ejector 2 of a liquid-gas type, covering the pump 1 with feedback for saturating the recirculation water with air, a saturator 3, the main flotation chamber 4, additional flotation chamber 5. Sewage well 6 is connected to the main flotation chamber using an ejector of the type 7 liquid-liquid. The ejector 8 is intended for the day of filing in an additional flotation chamber. For these ejectors (jet pumps), the carrier fluid is recirculated water. The primary and secondary flotation chambers have one inlet 9 and two outlets: outlet P - for recirculating water extraction and outlet Ш - for sludge discharge. Filtration chambers are installed in the recirculation water pipeline - the main 10 and additional P. The installation is equipped with a sludge sludge settling chamber 12. At the same time, the main output P

the flotation chamber is connected to the input 9 of the main filtration chamber 10, and the output of the main filtration chamber 10 is connected to the inlet for the suction fluid of the ejector 8 (or to the inlet of the pump 1, in the absence of additional chambers).

The output P of the additional flotation chamber is connected to the input 9 of the additional filtration chamber 11, the output of which is connected to the input of the pump 1. The second outputs Ш of the flotation chambers are connected to the input of the sludge sludge chamber 12, The sludge sludge chamber has an outlet 13 of water discharged from the sludge, which is connected to the input 14 of the sewage well 6, into which the untreated water from an external source enters the cleaning process. The output 15 of the sewage well is connected to the input of the ejector 7.

Exit In the selection of purified water is located on the pressure part of the recirculation water pipeline.

Flotation chamber 4 can be interlocked with filtration chamber 10 (see figure 2). In this case, the main flotation chamber 4 is divided into three sub-chambers 16, 17, 18.

16 - flotation sub-chamber, 17 - separation sub-chamber, 18 - sub-chamber of purified flotation water.

In the upper part of the sub-chambers 16 and 17 there is a sludge disposal mechanism 19 with a scraper that removes sludge into a slurry pocket 20 connected to the outlet Ш of the main flotation chamber 4. The exit Р of the flotation chamber 4 is made in the form of a wall 21 that connects the chamber 4 to the filtration chamber 10 The wall 21 has in the upper part of the hole 22, through which the liquid to be cleaned enters the subchamber 23 and passes through the filtering material 24 by gravity, into the subchamber 25, and then to the exit of the filtration chamber 10. The holes 22 have different diameters, which allows different hydraulic resistance

evenly distribute the liquid to be cleaned over the filter medium 24.

The sludge sludge chamber 12 (see FIG. 3) has a foam extinguishing chamber 26, a sludge storage accumulation chamber 27 and a sludge storage chamber 28. The sump chamber 26 is connected to the output Ш of the main flotation chamber 4, and the sludge chamber exit 13 is connected to the inlet 14 of the sewage well 6.

The installation works as follows: To bring the installation into operation, it must first be filled with 5 process water.

Pump 1 pumps water through a main closed circuit. At the inlet of the pump 1, part of the water is withdrawn by an auxiliary closed hydraulic feedback line and, through the ejector 2, the air-water is again fed to the inlet of the pump 1. Due to this, the air-air mixture is pumped into the saturator 3. In saturator 3, air under high pressure dissolves in water, and at the outlet of saturator 3, water saturated with dissolved air is supplied in parallel to the inlet fluid inlet of ejectors 7 and 8. A liquid-liquid ejector 7 is placed in a sewage well 6, where waste water flows and water from the sludge sludge chamber 12. The water to be cleaned in the ejector 7 is mixed with recirculated water saturated with air, and through the inlet 9 is supplied to the flotation chamber 4.

At the same time, the purified water at the beginning enters the flotation chamber 16 of chamber 4, which is under atmospheric pressure (see figure 2).

In the flotation cell 16, there is a massive release of air bubbles predominantly on the surface of the polluting particles. Air bubbles float to the surface, entraining particles of impurities, foam (sludge) forms on the surface.

The sludge is removed from the surface of the water by means of a sludge removing mechanism 19 into the sludge pocket 20.

From the flotation sub-chamber 16, water flowing through the partition enters the separation sub-chamber 17, where the final removal of air bubbles with polluting particles takes place. The sludge in this sub-chamber is removed in the same way as in the flotation sub-chamber 16,

From the separation chamber 17, water, through the gap between the partitions and the bottom of the chamber 4, enters the subchamber 18 with purified flotation of water,

The sub-chamber 18, together with the wall 21 with holes 22, plays the role of the exit P of the flotation chamber 4. In the wall 21, holes of different diameters are located below the water level in the chamber 18. The outflow of water into the sub-chamber 23 of the filtration chamber 10 under the action of the high-pressure head through the openings 22 occurs with different speeds due to the difference in diameter of the holes. Thus, the distribution of water in the subchamber 23 occurs in the shower mode, which allows you to evenly distribute water through the filter material 24. Additionally, the purified water through the filter material 24 falls into the subchamber 25 by gravity, from where it enters a closed hydraulic line through the outlet of the filter chamber at the entrance of the suction fluid of the ejector 8.

In the ejector 8, a process similar to the process of the ejector 7 occurs. Then, from the ejector 8, water through the inlet 9 enters the additional flotation chamber 5, from the chamber 5, water, similarly to the chamber 4, enters the filtration chamber 11 and through the outlet P of the filtration chamber And enters a closed the hydraulic line and enters the input of the pump 1,

Thus, in a closed hydraulic line at the inlet of the pump 1 there is water that has passed flotation and filtration chambers of cleaning.

The selection of purified water from the plant is carried out through pipe B, located behind the pump 1 in the pressure part of the closed hydraulic line. Thus, the water taken from

installation through pipe B, is under excess pressure created by the pump 1 and due to this is transported to the place of its use.

The filtration-flotation water treatment plant can be equipped with sludge chambers for flotation sludge 12 (see Fig. 3). In such a chamber, the foam entering through the outlet Ш of the flotation chamber enters the subchamber 26, where it is extinguished, and then the extinguished foam enters the subchamber 27, where oil is separated by coalescence, and the separated petroleum products float into the upper part of the subchamber 27. Stagnant water from the chamber 27 falls into sub-chamber 28, from where it is sent to the wastewater intake well.

Operation of the installation showed that when sludge enters chamber 12 with an oil content of about 10,000 mg / l, after sludge, the water contains no more than 300 mg / l, which corresponds to the content of oil in the water coming from an external source to the sewage well.

When the content of contaminants, for example, petroleum products, in water is up to 300 mg / l, cleaning on flotation chamber 4 reduces the pollution content to 15 mg / l, and after cleaning in the filtration chamber 10 to 7 mg / l, after cleaning in the flotation chamber 5 - up to 2 mg / l, and after cleaning in the filtration chamber 11-up to 1 mg / l.

Depending on the requirements for purified water, the number of flotation and filtration chambers is chosen.

Installation for filtration-flotation water treatment can be used for reverse water supply and water treatment at car washes, agricultural equipment and other working equipment in various industries.

Claims (3)

1. Installation for filtration-flotation water treatment, containing a closed hydraulic line with a main flotation chamber and the ability to sequentially connect one or more additional flotation chambers interconnected by liquid-liquid ejectors, a recirculation water pipe having a pump with an air ejector and a saturator, a supply of purified water, characterized in that filtration chambers are installed in the recirculation water pipeline, and the outlet pipe of the purified water is installed Novki located in the pressure line portion recirculating water.  2. Installation according to claim 1, characterized in that the flotation chambers have two exits, one of which is connected to the filtration chamber, and the other to the sludge sludge settling chamber, the pipe of the settled water of which is connected to the supply of purified water. 3. Installation according to claim 1, characterized in that the flotation chamber is interlocked with the filtration chamber, while the outlet for recirculating water is made in the form of a dividing wall, in the upper part of which holes of different diameters are located.