HU207972B - Coagulator for drinking-water-purifying systhem with container of modul systhem - Google Patents

Abstract

Equipment comprises chemical dosing, coagulator, flocculator, settler and opt. a fast filtration module. The coagulator is connected to the chemical dosing unit(s) by the chemical injection pipes and to the flocculator by the pre-treated water pipes. The flocculator is provided with a mechanical mixer, the upper part of the settler with clarifier plates, and its lower part with perforated pipes leading to the sludge discharge. - Typically, the coagulator is fitted with guide plates and the raw water pipe is connected to the bottom part of the settler and terminated in a pulsator section equipped with perforated pipes and a valve. - Raw water is introduced into the closed, pressurised space of the coagulator and brought to a turbulent state. At the same time its contaminant content is destabilised by the addition of chemicals. The flocculated water is settled, while the water below the settled material layer is subjected to periodic pressure waves, by introducing raw water simultaneously at a large number of points.(Dwg.0/1)

Description

BACKGROUND OF THE INVENTION The present invention relates to a coagulator for a modular containerized drinking water purification system, in particular a pulsation system, which is provided with a closed, vertical flow, and has an interior discharge plate; it has a raw water line at the top, chemical lines at the side and a pre-treated water line at the bottom.

Providing drinking water is a growing problem worldwide. Although many technical solutions for providing drinking water are known, it is a particular task to provide drinking water in emergency situations, natural disasters such as floods, or socio-economic disturbances such as flooding. in the case of war. As a result, there is growing interest and demand for mobile water purification equipment that can be deployed quickly and can operate effectively under a variety of conditions. Module units, preferably built into container units and transported as containers that meet the above requirements, are particularly important in intensifying cleaning technology. A preferred method is the pulsed flocculation purification process, in which raw water waves are occasionally thrown under the floating sludge curtain. Such a solution is described e.g. by Fr. Pat. 1,115,038. A prerequisite for the formation of a floating sludge curtain, as is well known, is the addition of a clarifying agent to the raw water and flocculation. According to the unanimous opinion of the literature, chemicals used as detergents should be quickly and evenly mixed into the water (Hunyadi, D .: Utilities, water supply, ... Mu'sz. K. ed. Bp. 1970, p. 209) can be solved. Turbulence in horizontal flow pools with baffles (Abos B .: Drinking water treatment. Tank. Ed. 1970, p. 28), in vertical flow tanks with mixing propeller (Varga-Mucsi-Valló: Water supply and its works. Tankönyvkiad. 1965, p. 157). .). These solutions can be used successfully with constant installation water purification plants and plants, with varying load requirements and changing raw water quality, because there are ample control options by changing the chemical dosage, necessitating the use of parallel connected equipment. This is not the case with mobile water purifiers, where the number of units required must be minimized, the least effort must be made to maximize results, and chemical utilization cannot be increased due to wastewater problems and supply difficulties, ie very delicate and tense demands. working conditions. However, pulsed-intensified floating sludge technology is only successful if coagulation and flocculation are carefully and accurately performed. The use of a propeller mixer or other mixing device does not provide a satisfactory solution, since it increases the energy requirement disproportionately, and does not allow separate mixing by the application of the various chemicals usually required, by setting differentiated turbulence conditions or by batch operation which slows down the process. using a coagulation unit which is disadvantageous for mobile equipment. However, when using hatch plates, it should also be borne in mind that pressure loss on the hatch plates will occur even when less turbulence is sufficient for the process.

It is an object of the present invention to provide a coagulator for a water purification unit made up of cellular module modules that allow for wide range control and suitable for pulsating floating sludge technology, while also providing energy saving, chemical savings and reducing wastewater problems.

The present invention is based on the recognition that, when chemicals required for coagulation are added to separated raw water zones of varying turbulence, the necessary coagulation and subsequent flocculation of the technology must be provided in a continuous operation.

Our further realization is further supported by the further realization that by using a closed, vertical-flow coagulator and dividing it into internal zones separated by horizontal baffles, it is sufficient to construct some of the baffles It can also be controlled differently, and the pressure loss can be optimally reduced when the need for low turbulence is required.

The present invention relates to a coagulant modular containerized, particularly pulsating, potable water purifier, which is equipped with a closed, vertical flow and interior drainage plate, a raw water line at the top, a chemical line at the bottom and a pre-treated water line at the bottom. at least one third of the adjustable baffle is pivotally mounted outside the horizontal axis, and any two chemical lines extend into at least one fixed or adjustable baffle, separated by other spaces, while the pre-treated water line is connected to the space below the lowest baffle.

Advantageously, the coagulator of the present invention is characterized in that the adjustable tori lead plates are held by the adjusting levers guided through the seal of the coagulator shell.

The invention will be described in more detail with reference to the accompanying drawings, without, however, limiting the scope of the invention or the claimed scope thereof.

Figures

Figure 1 is a schematic cross-sectional view of a preferred embodiment of a coagulator according to the invention.

Figure 2 is a schematic drawing of an adjustable baffle plate in Figure 1;

Figure II-II. .

The present invention has been implemented as part of a modular containerized water purification unit, the units of which are housed in a standard container. The coagulator (2) according to the invention is a closed cylinder in a vertical position, closed on its top by a spherical slice. A raw water line (6) with a regulator (27) is connected to the top of the coagulator (2). With chemical ke1

EN 207 972 Β raw, destabilized raw water is fed to the next unit of the unit, the flocculator, through the pre-treated water line (8). (Figure 1)

Inside the coagulator (2) there are fixed baffle plates (24) and adjustable baffle plates (21), which are disc-shaped and fit to the wall of the coagulator (2) with a small gap. The adjustable baffle plates (21) are secured to the axle adjusting arms (23) which extend through the seal (25) from the coagulator (2). The fixed baffle plates (24) are rigidly fixed at least at two points to the wall of the coagulator (2). Both the adjustable baffle plates (21) and the fixed baffle plates (24) have one or more openings (22) which can be of the same or different sizes and / or shapes, preferably in parallel planes in the coagulator (2). the openings (22) on the stationary baffles may be in the overlapping position or in a different position. The chemical agent (s) used for the clarification are added via the chemical conduit (s). The chemical conduits (7) are connected to the coagulator (2) through its cylindrical shell. In the case of a plurality of chemical compounds (7), they each end up in different compartments of the coagulator (2), which is divided into space sections by means of drain plates. The adjusting arms (23) are pivotally mounted in the seals (25) and rigidly connected to each other by an adjustable baffle (21) and adjusting arms (23). (Fig. 2) The pre-treated water conduit (8) starts from the space underneath the baffle plate located in the bottom of the coagulator (2), which leads to the flocculator forming the next unit. The coagulator (2) is further provided with a vent (26).

The coagulator (2) is used for purification of floating sludge curtain water with pulse system. The raw water is pressurized to the closed coagulator (2) via the raw water line in the degree of opening of the regulator (27) under pressure. As the raw water passes through the coagulator (2), turbulences occur on each hopper plate and various chemicals are introduced into the spaces between the hopper plates into the turbulent raw water (7) via chemical lines. The added chemical is rapidly and uniformly distributed in the raw water due to turbulence and forms coagulation centers with suspended solids and other impurities, so that the pre-treated water leaving the pre-treated water line (8) is already unstable and ready for flocculation.

Coagulation and subsequent flocculation are known processes of water purification, and it is not our task to describe them. However, the successful completion of these steps requires that the raw water composition previously selected for the test be selected and that the raw water flow rate through coagulator (2) [i.e., coagulator (2)] is consistent with the overall technological process, in keeping with the dynamic maintenance of the floating sludge curtain load]. The decisive factor in this setting is the turbulence in the spaces between the baffle plates. Each adjustable baffle plate (21) is individually and differently adjusted by means of the adjusting levers (23) to the required angle (i.e., non-horizontal) and the coagulation process is carried out.

The floating sludge curtain water treatment system, which has been successfully set and executed, has a 10% COD improvement compared to a non-pulsed unit with the same raw water load. If the goal is not to improve the COD, a 10% increase in load, ie an increase in drinking water yield, is provided. In addition, 5-10% chemical savings can be demonstrated. However, the convenience of the pulsation system limits the use of these benefits. The hopper plate coagulator of the present invention makes the process stable over a wide range of raw water composition (suspended solids). In cases where the use of a conventional flocculator would require an increase in the amount of chemical used or an increase in the volume of the coagulator, the present invention is sufficient to adjust the turbulence with adjustable baffles.

PATENT CLAIMS

Claims (2)

1. A coagulator for a modular containerized drinking water purification system, in particular a pulsation system, which is provided with a closed, vertical-flow coagulator and has internal space drainage plates; a raw water line at the top, a chemical line (s) at the side, and a pre-treated water line at the bottom, characterized in that at least one third of the baffles are adjustable baffles (21) pivotally mounted about a horizontal axis; it flows into other spaces separated by a fixed baffle plate (24) or an adjustable baffle plate (21), while the pretreated water line (8) is connected to the space below the lowest baffle plate. Coagulator according to claim 1, characterized in that the adjustable baffle plates (21) are held by the adjusting arms (23) which are guided through the gasket (25) on the periphery of the coagulator.