HU207269B - Purifying apparatus for after-treating waste waters first of all for removing phosphorous and metal content - Google Patents

Abstract

The proposed equipment is located in a polygonal and or circular housing contg. one or more cleaning chambers. These are adjacent to segmental filter units also with polygonal or circular cross plans. Effluent and chemical inlet pipework and clean water discharge pipes are also provided

Description

BACKGROUND OF THE INVENTION The present invention relates to a wastewater treatment plant for the treatment of wastewater, in particular to remove phosphorous and metal contents, by assembling units that perform part of the wastewater treatment technological functions.

The apparatus according to the invention can be used primarily for the after-treatment, removal of phosphorus and metal contents of mechanically and / or biologically purified and technologically treated waters.

It is known that the use of phosphorus and metals such as manganese, iron, copper, lead, nickel, etc., is undesirable for the preservation and use of natural waters. - include.

There are many embodiments of post-cleaning solutions, e.g. Valló-Benedek: Water Treatment, Wastewater Treatment (Budapest, MK 1982). The known purification methods and embodiments generally fall into three broad categories, namely mechanical, biological and chemical principles.

The apparatus of the invention provides a preferred embodiment of post-purification by chemical and chemical-physical means. Precipitation is one of the most widely used solutions in chemico-physical principles, while crystallization is the most common solution in chemical solutions.

Precipitation with aluminum salts, iron salts, lime, or a combination thereof, while crystallization involves a certain amount of lime, soda, etc. dosing.

Precipitation depends on when it is used in purification technology, so there is a known pre-, simultaneous and post-precipitation method. The most favorable result in terms of precipitation efficiency is achieved by the precipitation used for post-purification.

Among the post-purification methods, post-precipitation is that the phosphorus and metal formations together with the various precipitants form hydroxides and water-insoluble compounds, such as carbonates, which can be removed partly by leaching and partly by filtration. The sludge from the removal has a high water content and can be dewatered to a residual water content of generally 10-20% by weight, depending on the precipitant.

During the crystallization, the phosphorus and most of the metals can be crystallized from the supersaturated aqueous solution to the bedding material in the purification space, as phosphorus and metal carbonates and max. As granules with a residual water content of 0.5% by weight, it can be removed from the apparatus. To a lesser extent, the amorphous form is e.g. fluffy hydroxides are removed by filtration.

However, due to the nature of the chemical reactions, each post-purification process is more or less sensitive to temperature changes, as is known.

Devices for carrying out the post-purification processes described above are described, e.g. HU-PS 165 485; DE-PS 2218 180; patents. These plants are capable of carrying out one or two technological steps after the waste water treatment. However, according to the established practice, these devices are always adapted to existing wastewater treatment plants.

The multifunctional solutions implementing known wastewater treatment methods generally have the disadvantage that the individual phases of the purification technology are arranged in a separate apparatus, apparatus with a horizontal arrangement, so-called. blocks.

Wastewater treatment plants installed in this way are very space consuming. A further disadvantage of separately installed units is that they require more building materials and, in order to carry out the technological tasks properly, they require the installation of special quality insulated pipes and equipment elements, which greatly increase the costs.

Attempts have been made to overcome the drawbacks of the above-described equipment and to provide equipment in which the cleaning units are integrated in a unit.

Such a prefabricated assembly can be found in HU-PS 200733. patent, which is our own solution.

It is an object of the present invention to provide an apparatus for overcoming the above-described drawbacks of known equipment of similar design, which is accomplished by an apparatus which utilizes a small space under more favorable conditions than the original by combining the basic function steps of known after-treatment technologies. they provide a well-made, one-stop unit.

The present invention is based both on the recognition that the applied basic chemical technology part is essentially temperature sensitive, while the additional technological part is based on the principle of physical filtration, and on the recognition that the purification efficiency of the basic chemical technology can be greatly enhanced besides the cleaning function, the filter part is also designed to perform a thermoregulatory function.

The object of the present invention is achieved by an apparatus having a single or multi-chamber cleaning chamber integrated in a common polygonal and / or circular symmetrical shell housing, filter units formed by filter bodies formed by filtering bodies and a cleaning chamber, pipes, technological drainage pipes for the purified water, connected to the filter units.

In a preferred embodiment of the device according to the invention, there are treatment receiving unit (s) between the filtering units delimiting the cleaning area, and in another preferred embodiment, further basic handling cleaning units are located below the basic cleaning cleaning unit, cleaning room and filtering units.

The filter units of another preferred embodiment of the device according to the invention are intermittently formed.

The apparatus of the invention is a further embodiment

A preferred embodiment of the invention is provided with technological recirculation lines connected to the filter units.

In a preferred embodiment of the device according to the invention, the technological - washing - lines and the filling and discharge lines for filling the cleaning space are provided with control valves operatively connected to one another.

By way of example, the apparatus according to the invention! Embodiments of the invention will be described in detail with reference to the accompanying drawings, in which:

Figure 1 is a sectional view of the apparatus of the invention, a

Figure 2 is a sectional view taken along plane II-II of the device of Figure 1.

The apparatus according to Fig. 1 is a plan view of a circularly arranged circular ring (see Fig. 2) consisting essentially of a cleaning circle (1) built into a common circular symmetrical housing (14) for settling and / or crystallizing (1). a filter unit consisting of filter bodies (2), a sewer line (5) connected to the cleaning room (s) (6) and a chemical line (6) and the drainage lines (8 and 13) connected to the filter units (2) and basic cleaning functions (1) cleaning milks) and (2) filtration units are made up of an additional treatment (3) receiving and receiving unit.

The filter units (2) of the exemplary apparatus are of discontinuous design and are provided with a recirculation wash line (10), wherein the recirculation wash line (10) and the wastewater line (5) filling the cleaning space and The discharge lines (8 and 13) are provided with a control valve (11 and 15) operatively connected to one another.

The wastewater to be treated is pumped by a level switch pump (4) through the mixing nozzle (5) of the wastewater line (5) into the purification space (1), which is connected to the purification space (6) by the chemical line (6). Connected to the chemical system (6) is a distribution element (1) extending into the cleaning room (1) and supplying the chemical to the cleaning room (1), which is known in its conventional form.

From the purification space (1), the primary purified water passes through a conventionally designed circular duct (7) via a separable line (7) to the filtration unit (2) delimiting the purification spaces (1) and then through the filtration units (2) under pressure and it is completely cleaned of floating dirt and leaves the system via the drain line (8).

Removal of sludge or granules that have accumulated and remain during cleaning can be effected via a discharge line (9) under water pressure. As mentioned above, the filter units (2) are of discontinuous design, the regeneration of which is effected by pressure-controlled backwash through the recirculation washing line (10).

Depending on the technology, the backwash water can be recirculated via a valve (11) or a pump (12) to a waste water pipe (5) or, if desired, discharged into a storage or regeneration tank. The emptying of the device is made possible by a discharge line (13), which is connected to the cleaning space (1) and the filter units (2), preferably with gate valves.

It is also clear from the exemplary apparatus illustrated in the drawings that (1), the filter units (2) and the treatment and receiving unit (3), which perform the basic sub-technological functions of cleaning, form a single unit.

Note that the design of the apparatus is not limited to the embodiment described above, e.g. the structure of the apparatus and the structure or location of the filter units may also be provided as a split truncated cone.

Such an arrangement of the device according to the invention has the advantage that it is insensitive to changes in temperature, since the circular symmetrical positioning and placement of the filters and the treatment-receiving unit and the housing shell together provide adequate thermal insulation. The unit for water purification - regulating the functions of receiving and treating water - can be placed in a closed position and the space required for the equipment is small, easy to manufacture, transport and install, and not least good operating conditions.

A further advantage of the device according to the invention is that it allows aesthetic design while saving material.

The main advantage of the apparatus according to the invention is that the design of the filter units and the recirculation system ensures a continuous operation, since the filter unit is so divided that some filter units and technological treatment of the cleaning units are carried out, filtering tasks.

Claims (6)

PATENT CLAIMS Wastewater treatment plant for treating wastewater, in particular for removing phosphorus and metal contents, by installing units performing partial wastewater treatment functions, characterized in that a single or multiple chamber (1) filter units (2) formed by filter bodies (2) delimiting the purification space (1), arranged in a circular or polygonal layout, planes of wastewater (5) and chemical pipes (6) connected to the purification space (1), have discharge lines (8, 13). Waste water treatment plant according to Claim 1, characterized in that there is a treatment-receiving unit (3) between the filter units (2) delimiting the treatment area (1). A wastewater treatment plant according to claim 1, characterized in that there are treatment-receiving units (3) under the basic cleaning units - the cleaning area (1) and the filter units (2). HU 207 269 Β 4. A wastewater treatment plant according to any one of claims 1 to 3, characterized in that the filter units (2) are intermittently formed. 5. A wastewater treatment plant according to any one of the preceding claims, characterized in that it also has a technological recirculation-washing line (10) connected to the filter units (2). 6. A wastewater treatment plant according to any one of claims 1 to 3, characterized in that the technological recirculation-washing line (10) and the wastewater line (5) and the drainage lines (8, 13) filling the purification space (1) are connected to control valves (11). 15) are provided.