RU2370455C1 - Device for water deironing - Google Patents

Abstract

FIELD: water supply.

SUBSTANCE: invention concerns natural water deironing, degassing and removal of coarse impurities and fine sand. Device includes pipelines for source and flush water supply, treated and flush water and slime discharge, aeration device, partially submerged floating filtering load with gas discharge unit attached to it, upper and lower distribution devices. Gas discharge unit includes pipe mounted so as to allow for variable submersion depth, and control valve. Gas discharge unit pipe features mesh filter in its lower part. Aeration device includes air and water mixing chamber positioned in the centre of aggregate case. Mixing chamber is made in the form of vertical cylindrical tube sealed on top and featuring conical slime collector at bottom, with tangential inlet pipe and vane swirler mounted inside the tube. Vane swirler is made in the form of eight-vane impeller.

EFFECT: improved water treatment quality by intensified process of aeration and degassing, reduced consumption of flush water and operational costs, enhanced efficiency of plant.

6 cl, 2 dwg

Description

The invention relates to a device for water deferrization, carried out by intensive aeration-degassing, followed by oxidation of ferrous iron and the retention of iron hydroxides during the passage of water sequentially through layers of non-flooded coarse-grained floating with catalytic properties and flooded fine-grained floating inert charges, and can be used for deferrization of natural water , as well as for degassing and cleaning of coarse impurities and fine sand.

A known installation for iron removal of water, containing a water tower with a barrel and a tank with a roof, pipelines for supplying the source and discharge of purified water, a pipeline for draining sludge into the sewer, an aerator in the form of a perforated nozzle located under the roof of the tank, a contact filter made of a coarse-grained floating load , and having a drainage system located in the lower part of the tower barrel a clarification filter made of fine-grained loading and having a distribution system, middle and lower drain nye System (RF patent №2092450, S02F 1/64, publ. 10.10. 1997).

The disadvantages of this installation are:

- low efficiency of degassing and water purification from iron in the source water due to the use of simplified aeration;

- the absence of a node for the removal of gases extracted from water (CO ₂ , H ₂ S, etc.) that impede the effective oxidation of ferrous iron;

- decrease in plant productivity over time due to a decrease in the filtration rate as the filter load becomes dirty;

- a long period of formation of a catalytic film on the flooded inert loading of the contact filter;

- high water consumption for washing the filter load, due to the separate washing of the contact and clarification filters;

The operation of such a filter in preventive and repair modes is extremely complicated.

A device for water purification is known, comprising a housing with catalyst and filter material layers located therein, lower and upper drainage devices, a supply pipe on which an ejector is mounted, water treatment and regeneration pipelines connected to the upper and lower parts of the housing, respectively (RF Patent No. 2201901 IPC С02F 1/64, published on April 10, 2003).

The disadvantages of this device are:

- low mass transfer of air introduced using an ejector device with treated water;

- violation of the oxidation mode of ferrous iron and, therefore, the deterioration of the cleaning effect after interruptions in the supply of water to the installation and temporary shutdown of the ejector;

- significant operating costs due to the need to ensure a pressure drop across the ejector of at least 0.15 - 0.20 MPa for normal operation of the latter.

The closest in technical essence and the technical result achieved to the invention is a water deferrization apparatus, comprising pipelines for supplying source and washing water and for discharging purified and washing water, an aeration device connected to the source water supply pipe, a closed-type contact filter with partially flooded floating loading, lower switchgear and gas outlet unit, consisting of a pipe installed with the possibility of changing the depth of its immersion, and regulating iruyuschego valve refining chamber with granular media filter with a specific gravity greater proportion of treated water and the shutoff device between the contact and refining filters (RF Patent №2165897, IPC S02F 1/64, publ. 27.04.2001).

The disadvantages of this installation are:

- insufficient degree of preliminary water purification;

- high flow rate of wash water;

- the need to use washing pumps and increased time costs to ensure high-quality washing of the heavy filter load of the clarification filter;

- reduced installation performance and increased energy costs due to pressure drop when using aeration devices.

The technical result of the invention is to improve the quality of pre-treatment of water by intensifying the processes of aeration-degassing and oxidation of organic compounds in the source water, reducing the consumption of washing water, operating costs and increasing the productivity of the device at higher concentrations of iron, carbon dioxide, hydrogen sulfide and other impurities.

The technical result is achieved by the fact that in the installation for iron removal of water, containing pipelines for supplying source and washing water and for removing purified and washing water, an aeration device, a partially flooded floating filter load with a gas outlet assembly located in it, consisting of a pipe installed with the ability to change the depth of its immersion, and the control valve, the upper and lower distribution devices, the aeration device includes a chamber for mixing water and air, located in the center of Fitting whisker and configured in the form of a sealed top and a conical bottom equipped chip catcher vertical cylindrical tube with a tangential inlet, and installed inside the vane swirler.

The blade swirl can be made in the form of an eight-blade impeller, rigidly attached with its blades mounted at an angle of 30 ° relative to the horizontal plane, to a vertical cylindrical pipe in its middle part. Floating filtering load can be made coarse with catalytic properties and fine granular inert.

The upper distribution device can be made in the form of perforated pipes radially located in the horizontal plane, the outlet openings of which are directed upwards.

The gas outlet assembly pipe may be equipped at the bottom with a strainer.

The installation provides a pipeline for the removal of sludge.

Figure 1 presents a General view of the installation for deferrization of water.

Figure 2 is a section along the line aa in figure 1.

The water deferrization unit consists of a housing 1 filled with a floating filtering load: partially flooded coarse-grained with catalytic properties 2 and flooded inert fine-grained 3. In the center of the enclosure 1 of the installation there is an aeration device including a chamber for mixing water and air. The chamber for mixing water and air is made in the form of a vertical cylindrical pipe 5 hermetically sealed at the top and equipped with a cone bottom sludge collector 4 with a tangential inlet pipe and a blade swirl installed inside it 6. The blade swirl 6 is made in the form of an eight-bladed impeller rigidly attached with its blades mounted at an angle 30 ° relative to the horizontal plane, to the vertical cylindrical pipe 5 in its middle part. In the upper part of the installation there is an upper distribution device 7, designed to distribute the treated and rinse water. To ensure a uniform distribution of the source and wash water over the area of the filter charge, the upper distribution device 7 is made in the form of perforated pipes radially located in the horizontal plane, the outlet openings of which are directed upwards. In the layer of coarse-grained loading 2 there is a gas outlet assembly 8, consisting of a pipe with a strainer in its lower part, installed with the possibility of changing the depth of its immersion, and a control valve. In the lower part of the installation are located: a lower collection and distribution device 9, a purified water drainage pipe 10, a wash water drainage pipe 11, a feed water supply pipe 12 connected by a tangential inlet pipe with a vertical cylindrical pipe 5 above the conical sludge collector, and a sludge drain pipe 13, attached to the lower part of the conical sludge collector 4. In the upper part of the installation there is a pipeline for supplying washing water 14.

Installation for deferrization of water works as follows. The source water, containing mechanical impurities generated, for example, during sanding of wells, corrosion of steel water pipes and water conduits, carbon dioxide, hydrogen sulfide and iron ions, is pressurized together with air through a pipe 12 through a tangential inlet to the chamber for mixing water with air, where water is mixed with air and its preliminary purification from coarse impurities. Upon entering the mixing chamber, made in the form of a vertical cylindrical pipe 5 with a tangential inlet nozzle 4 that is hermetically sealed at the top and equipped with a conical sludge collector 4 from below, the water acquires a multidirectional rotational vortex motion installed in its middle part. At the same time, under the action of the emerging centrifugal force, coarse particles move (are discarded) to the walls of the vertical cylindrical pipe 5, slide down and accumulate in the conical sludge collector 4.

Performing a rotational movement, the water, together with the air bubbles extracted from it, progressively rises through the pipe up to the vane swirler 6, made in the form of an eight-bladed impeller, rigidly attached by its blades, mounted at an angle of 30 ° relative to the horizontal plane, to the vertical cylindrical pipe 5. After passing through the blades of the swirl 6, with a constant progressive upward movement, the air-air flow swirls in the opposite direction to the swirling direction at duschey step. Aerated water through the upper switchgear 7, made in the form of perforated pipes radially located in the horizontal plane, the outlet openings of which are directed upward, flows under pressure in the form of jets into a layer of an unfilled floating coarse granule having catalytic loading properties 2. The layer height of an unburied floating coarse granular c the catalytic properties of the load 2 is set by the immersion depth of the pipe of the gas outlet unit 8 into the load. In a non-flooded coarse granular floating bed with the catalytic properties of loading 2, physicochemical processes of water degassing take place - removal of carbon dioxide, hydrogen sulfide, which creates favorable conditions for the oxidation of ferrous iron to ferric, and a deeper saturation of water with oxygen. Carbon dioxide and hydrogen sulfide released from the water are removed through the gas outlet 8 to the atmosphere, and the purified water flows further from top to bottom into the flooded layer of the fine-grained floating inert charge 3, where it is purified from suspended solids and iron, collected by the lower collection and distribution device 9, and discharged through pipeline 10 The sediment accumulated in the conical sludge collector 4 is removed as necessary through line 13 into the sewer.

As the floating filter load 2, 3 becomes contaminated, it is flushed with water supplied with the necessary intensity through the pipeline 14 with closed valves on the pipelines 10, 12 and 13. Water is supplied through the upper switchgear 7 to the upper space of the installation with a relatively high speed and passes through layers of coarse and fine-grained loads 2, 3 in the direction from top to bottom. In this case, the expansion of the fine-grain loading occurs. Wash water is discharged through line 11.

EFFECT: invention improves the quality of preliminary water purification by intensifying aeration-degassing processes and oxidation of organic compounds in the source water, reducing the washing water consumption, operating costs and increasing the productivity of the installation. The installation allows you to purify water with a high content of dissolved gases, ferrous iron and mechanical impurities.

Claims (6)

1. Installation for iron removal of water, containing pipelines for supplying source and washing water and for discharging purified and washing water, an aeration device, a partially flooded floating filter load with a gas outlet assembly located in it, consisting of a pipe installed with the possibility of changing the depth of its immersion , and a control valve, upper and lower switchgears, characterized in that the aeration device includes a chamber for mixing water and air, located in the center of the installation casing and vertical cylindrical pipe with a tangential inlet pipe and a blade swirler installed inside it, hermetically sealed at the top and equipped at the bottom with a conical sludge collector. 2. Installation for iron removal of water according to claim 1, characterized in that the blade swirl is made in the form of an eight-blade impeller, rigidly attached with its blades mounted at an angle of 30 ° relative to the horizontal plane to a vertical cylindrical pipe in its middle part. 3. Installation for iron removal of water according to claim 1, characterized in that the floating filter load is made of coarse-grained with catalytic properties and fine-grained inert. 4. Installation for deferrization of water according to claim 1, characterized in that the upper distribution device is made in the form of perforated pipes located radially in the horizontal plane, the outlet openings of which are directed upwards. 5. Installation for deferrization of water according to claim 1, characterized in that the pipe of the gas outlet is equipped in the lower part with a strainer. 6. Installation for deferrization of water according to claim 1, characterized in that it contains a pipeline for the removal of sludge.

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