HU189696B - Equipment and process for removing of iron and/or manganese ions dissolved in the water of wells - Google Patents

Abstract

Dissolved iron and manganese can be eliminated from the water in wells by dividing the cylindrical well space in two parts with the mantel of a frustrated cone and pptg. the iron and manganese ions in the well water by the addn. off centre above the conical partition of appropriate chemicals, e.g. potassium-permanganate, while blowing compressed air into the space below the partition. - This arrangement ensures that no ppte. or chemical can enter the lower water supplying part of the well. The water in the upper space which contains the pptd. pollutants is removed by pumping to a filtering plant outside the well, the filtered water is fit for consumption.

Description

The present invention relates to an apparatus and method for removing iron and / or manganese ions using the water body of wells.

The chemical process for removing iron and manganese from the water is carried out in the well body of the well itself, while the filtration of iron / manganese compounds released from the water is performed outside the well. The main field of application of the present invention is to make the water of wells drilled for drinking water supply suitable for human consumption.

Before describing the subject matter of the present invention, it is intended to provide a brief and non-exhaustive description of the relevant state of the art.

It is known that wells of 15-20 m depth and different diameters are dug for the construction of wells, which during operation create a water column of 5-15 m height. Occasionally, a significant diameter of wells is required by construction technology. Depending on the diameter, this represents a significant body or volume of water in which only the well pump and the connecting piping are routinely installed. The disadvantage is that it occupies a significant area of unused water.

Now, iron / manganese removal of well water is currently done in various ways, e.g. preferably, the process described in U.S. Patent No. 628,006, whereby air mixed with ammonia is pressed into the filter layer around the well to increase the pH and redox potential of the water to be treated. In the solution used, the oxygen required to oxidize the iron ions is introduced into the aquifer through dedicated wells. The oxygen-containing medium, which is usually air, is injected into the aquifer around the well using a compressor at relatively high pressures (5-100 bar). The disadvantage of this solution is that it is technically and energy-intensive.

An improved solution for delivering oxygen to the aquifer is an attempt to overcome this disadvantage by the process of pressurizing the air into the aquifer at variable depth as described in U.S. Patent No. 722,848 and also developed in the USSR.

A disadvantage of these underground decontamination processes is that it is expensive to set up the service wells for their implementation. If the oxidizing medium is introduced into the aquifer through the well space, the water production plant is intermittent. In both cases, special operating parameterized press equipment is required.

It provides a different solution to the Hungarian patent No. 156 245 discloses that the iron and / or mangántalaoftást solves that these ions, if the water ask ^- during the emergency light corresponding to the removal of the filter medium * impinge separated out from the water. The precipitated material (Fe ₃ 'and, in particular, Mn ₄ oxide) adheres to the surface so strongly that the filter cannot be regenerated by washing, and after a longer or shorter run time depending on the water quality, the filter medium must be replaced.

The disadvantages of these, and other non-detailed, procedures are already obvious. Complicated and expensive machinery, heavy handling, soil damage, intermittent etc. It was with these difficulties in mind that we worked in our investigations, which ultimately led to our invention.

The present invention relates essentially to an apparatus for removing iron and / or manganese ions dissolved in water of wells and having the following configuration.

A truncated conical mantle is attached to the inner shell of the wells so that the fringe of the truncated cone narrows toward the aperture of the cone, so that the fracture of the cone shafts and the air extends beyond the water space while a well pump and a chemical feeder are installed in the reactor space, while the filtration device is located outside the wells of the wells.

It is a further object of the present invention to provide a method for removing iron and / or ranganese ions dissolved in well water by continuously introducing into said wells an oxidizing agent such as air and / or potassium permanganate that precipitates iron and ranganese ions from water. -manganese-containing water is filtered through a filter located outside the well's well.

The invention is described in detail in FIG. 1 outlined by example! This example not only illustrates the apparatus but also illustrates the process that can be derived therefrom.

Referring to FIG. Well 1 of the well sketched in Figure 1 extends into the 2 active aquifers of the soil. The water space 3 and the reactor space 4 of the water inside the well shaft 1 are separated by a truncated cone 5, which may be fixed to the shaft 1, for example welded, but may also be screwed to the window frame. in its place, the inlet of the air distributor 6 and the air distributor 6a extends into the water space 3, while the chemical feeder 7 and the well pump 8 are located in the reactor space 4. It should be noted that the air distributor 6, the chemical dispenser 7 and the well pump 8 are units generally known and used in the industry, and therefore no detailed description is required.

For the sake of clarity, it is mentioned that, for example, the ring distributor 6 with openings - tQrus - is suitable for the air distributor. Compressed and purified air enters the water space 3 through these openings. Good utilization of space is facilitated by the treatment building 11 built on concrete foundation 10, in which the weight of the filtering device 9 can advantageously be used to load the well of the well. Of course, various sensors, indicators, automation can be connected to our equipment.

For better clarity, taps, connectors, pumps, blowers etc. was ignored.

There are, of course, several minor or major modifications of the invention which may be made in the circumstances, e.g. soil quality, location, etc. - can be properly applied.

so e.g. the treatment building 11 may also be designed such that its exterior wall is intersected or tangent to the top surface of the well, or may be located further away from the well, multiple times the diameter of the well; , in this case the filtering device 9 may be installed in the open air.

The iron / manganese derivatization procedure in our equipment is already as follows.

Through the inlet of the air distributor 6a, compressed and purified air is introduced into the water 3 of the well, the level of the well being 4a in the figure. The air is oxidizing

189,696 and also causing water to mix, the oxidation of iron / manganese ions and the formation of oxide hydrate from the water occurs. If the oxidizing effect of the air is not sufficient for this purpose, the Fe (II)

- and is not catalytically oxidizable with air to oxidize Mn (H) ions in the pH range of well water, such as a strong oxidant, e.g. potassium permanganate is added via the chemical feeder 7 to the reactor space 4. The entry of the chemical into the active aquifer 2 of the well is prevented by the truncated cone 5, thus. the active layer is not contaminated. The water containing the precipitate of iron / manganese oxide hydrate precipitated in the reactor space 4 is removed by the well pump 8 and transferred to the filter 9. These filtering devices can be of various types that are commonly used in the industry, so let us not go into details. It is characteristic of our process that iron / manganese ions are excreted in the body of the well water itself, while the precipitation formed is filtered outside the well body of the well. 20

The main advantages of the iron and / or manganese decontamination apparatus and method of operation of the present invention are as follows:

- Removal of iron and / or manganese ions is carried out in a continuous operation which is most favorable to the wells. 25

- There is no need for costly service wells.

- Does not require any special parameter press equipment.

- The oxidation of manganese ions in water with a strong oxidizing agent occurs after the prior oxidation of iron ions by air. thus, using as little oxidizing agent as possible, e.g. potassium permanganate is needed.

In the case of a large area underground water abstraction facility, where the concentration of iron and manganese ions dissolved in the water differs from one well to another, the apparatus according to the invention may be adapted to each well. thus, as in the case of a central water treatment plant, there is no need to iron and / or manganese the entire amount of water,

Claims (2)

Claims An apparatus for removing iron and / or manganese ions dissolved in well water, comprising a well casing, an air distributor, a chemical dispenser, a well pump unit and a filtration device, characterized in that the (tapered) (5) divides into a water space (1) and a reactor space (4), while the air distributor (6) extends into the water space (3), the well pump (8) and the chemical dispenser (7) are arranged into the reciter space (4), and the filtration device (9) is located outside the well (1). 2. A process for removing iron and / or manganese ions dissolved in well water, characterized in that the oxidizing agent, preferably air and / or potassium permanganate, is continuously introduced into the water and the precipitated water is filtered through a filter located outside the well. .