FR2458514A1 - INSTALLATION FOR PURIFYING WATER OR WASTEWATER - Google Patents

Abstract

THE INVENTION RELATES TO A WATER OR WASTEWATER TREATMENT PLANT. ACCORDING TO THE INVENTION, IT INCLUDES, IN A COMMON COATING, A FLOCCULATION CHAMBER 1 AND A SEDIMENTATION CHAMBER 2. CHAMBER 1 HAS A TRAPEZOIDAL SECTION BOTTOM AND IS SEPARATED FROM CHAMBER 2 BY A SPILL WALL 3 AND A WALL SUPPORT 4, FORMING SPILL SLOT 5. AT ITS LOWER PART, FLOCCULATION CHAMBER 1 INCLUDES INLET DUCTS 6 PERFORATED WITH ORIFICES DIRECTED TOWARDS THE BOTTOM, ON WHICH IS LOCATED, ALONG THE DUCTS 6, A PROJECT 7 OF TRIANGULAR SECTION, ABOVE WHICH IS FIXED THE STRAINER INSERT 8, SEPARATED FROM THE SIDE WALLS BY RECIRCULATION POCKETS AND ENDED AT ITS LOWER PART BY GUIDE PLATES. BEDROOM 2 HAS AT ITS LOWER PART A SEDIMENTATION SPACE 12 WITH DRAIN TUBE 13, AT ITS CENTRAL PART, A MULTI-FLOW COUNTERCURRENT PACKAGE 14, AND AT ITS UPPER PART, A LIQUID DISCHARGE CHUTE 15 CLARIFIED. THE INVENTION APPLIES IN PARTICULAR TO WATER TREATMENT.

Description

The object of the invention is a water treatment plant or

  wastewater, consisting of a chamber

  flocculation and a sedimentation chamber.

  Known water or sewage treatment plants, in which the flocculation chamber and the sedimentation chamber form a single block in a

  coatings, are based on the coagulation method

  "Volumetric" sedimentation called "shallow", carried out in multiple flow decanters. The construction of the flocculation chambers provides for rotary agitators or it is a hydraulic construction

with corrugated panels.

  The single-unit treatment plant is known from the Dutch production surface water "Pielkienrood-Vimitex BV", consisting of a hydraulic flocculation chamber, a multi-flow decanter and auxiliary equipment: a pump

  recirculation and a sediment reservoir. The construction

  The flocculation hydraulic chamber consists of a tank filled with corrugated panels placed vertically in three sections working in series. Also known is the single-block plant for the partial treatment of surface water, manufactured by the company "Passavant" (RFA) in which the mechanical flocculation chamber is coupled to the multi-flow settler in series, symmetrically to the longitudinal axis, forming two parallel paths of water flow subjected to the process of coagulation and sedimentation. The mixing chamber is divided into two parts by a transverse partition, each

  part comprising a mechanical stirrer.

  The essential part of the water or sewage treatment plant according to the invention, comprising the flocculation chamber and the sedimentation chamber forming a single block in a common coating, lies in the fact that the flocculation with trapezoidal section at the bottom is separated from the sedimentation chamber by walls forming a discharge slot, the lower part of the flocculation chamber comprises perforated pipes whose orifices are directed towards the bottom, o is formed according to the axis of the chamber, along the pipes, a projection of triangular section, above which is attached a strainer insert, separated from the side walls by pockets for recirculation suspensions, completed at its bottom by guiding plates . In the lower part of the sedimentation chamber, there is the sedimentation space with the sediment discharge tube, in the central part there is a pack for the countercurrent with multiple flows, while at the upper part there is find the evacuation chute

clarified liquid.

  The water or sewage treatment plant according to the invention eliminates the mechanical devices for mixing the liquid and for recirculating the sediments, makes it possible to assemble units forming a block into a common section, the compact construction allowing the installation of the installation in elements whose surface

  is limited, for example in container.

  The invention will be better understood and other purposes, features, details and advantages thereof

  will become clearer during the description

  explanatory text which will follow with reference to the accompanying schematic drawings given solely by way of example illustrating an embodiment of the invention and in which - Figure 1 shows the installation in vertical section; and - Figure 2 shows the installation in section made

  along line A-A through the flocculation chamber.

  The water or wastewater treatment plant is executed in a common coating, in which are mounted: the flocculation chamber 1 and the sedimentation chamber 2. The flocculation chamber 1 trapezoidal section at its bottom, is separated from the sedimentation chamber 2 by a discharge wall 3 and a support wall 4, which form in the central part a discharge slot 5. In the lower part of the flocculation chamber 1, two pipes 6 are mounted in perforated tubes, whose orifices are directed towards the bottom. At the bottom of the flocculation chamber, along its axis along the lines 6, is a projection 7 of triangular section. Above the trapezoidal bottom, is attached the separate strainer insert 8

  side walls 9 by pockets 10 for the recirculation

  lation. The lower part of the insert 8 ends with guide plates 11. The sedimentation chamber 2 comprises at its lower part a sedimentation space 12; at its lowest point is embedded

  a drain tube 13 for the evacuation of sediments.

  In the middle part of the sedimentation chamber 2 is mounted a pack for the multiple flow countercurrent 14, while in the upper part there is a discharge chute 15 of the clarified liquid in the form of a perforated tube. The entire installation is mounted on feet 16, making it possible to place the installation in any place. The liquid subjected to the purification process arrives at the flocculation chamber 1 through the discharge pipes 6 with the reagents. chemicals and products that promote the coagulation process. The protrusion 7 located on the bottom creates intense mixing conditions, thus prolonging the process of rapid mixing of the reagents with the liquid, started in the conduct of

  backflow, together with recirculating sediments

  lation flowing through the spill pockets 10.

  After intense mixing at the bottom of the floc chamber

  1, the liquid flows from bottom to top through the strainer insert 8 placed horizontally. The strainer insert 8 causes a slow pulsating movement of the flowing liquid and its threads into the entire volume of the flocculation chamber. After the coagulation process, the liquid is directed to the sedimentation chamber 2 by the 3 and the slit beneath the countercurrent package 14. The thickened sediments flow from the package 14 onto the sedimentation space 12 from which they are discharged through the discharge tube 13. After the clarification, the liquid is discharged through the chute 15 outwards for

  subsequent technological treatment.

  Of course, the invention is not limited to the embodiment described and shown which has been given by way of example. In particular, it includes all the means constituting technical equivalents of the means described and their combinations if they are executed according to its spirit and put

  in the context of protection as claimed.

Claims (2)

R E V E N D I C A T I 0 N S   1. A water or sewage treatment plant comprising in a common lining a flocculation chamber and a sedimentation chamber forming a   block, characterized in that the floc chamber   (1) has a trapezoidal section bottom is separated from the sedimentation chamber (2) by a spill wall (3) and a support wall (4), forming a discharge slot (5), the lower part of the flocculation chamber (1) comprising perforated inlet ducts (6) whose openings are directed towards the bottom, on which is located, in the axis of the chamber, along the ducts (6), a protrusion (7) of triangular section, above which is attached the strainer insert (8), separated from the side walls (9) by pockets (10) for recirculation, and finished   at its bottom by guide plates (11).   2. Installation according to claim 1, characterized in that the sedimentation chamber (2) has, in its lower part, a sedimentation space (12) with a sediment discharge tube (13), in its central part, a package for the multiple flow countercurrent (14), and at its upper part, the evacuation chute (15) clarified liquid. :., X "2 * S: