FR2881737A1 - Surface water treatment comprises fixing a socket with pipe and sleeve, which fits in an opening of the surface water, placing the treatment tank and connecting a device - Google Patents

Abstract

The tank (100) is adapted to a separation element contains a groove, an anchorage zone and a pin, which is placed between the element and the tank. An independent claim is included for a connection device.

Description

The present invention relates to a water treatment tank

  runoff and a connection device adapted to be used with such a treatment tank. It finds application in the field of filtration of runoff water.

  Runoff typically contains a significant amount of hydrocarbons, sludge and various suspended solids that must be removed prior to reuse.

  A runoff treatment tank is divided into two compartments connected in series, namely, on the one hand, a settling compartment in which a stream of water to be treated is introduced through an inlet and, on the other hand, a hydrocarbon extraction compartment from which a water flow decourbée and freed of hydrocarbons is discharged through an outlet port to an outlet pipe. These two compartments are delimited by a vertical perforated partition wall.

  When there is a large volume of runoff, a bypass line within the treatment tank allows runoff water to bypass the treatment steps to flow directly into the sewer line. exit and avoid overflow of the treatment tank.

  The introduction of this bypass line inside the tank is complicated and requires the technician to enter the inside of the treatment tank, which is not easy, and forcing to empty the tank when this pipe must be changed during operation.

  In addition, when this bypass line is proposed as an option, the order of assembly and the shape of the various elements contained in the treatment tank are modified according to whether the bypass line is provided or not, which is penalizing the point of productivity.

  An object of the present invention is to provide a trickle water treatment tank which does not have the disadvantages of the prior art.

  For this purpose, is proposed a runoff water treatment tank comprising a runoff water inlet and a treated water outlet, said runoff inlet being adapted to receive an inlet connection device comprising a connection interface with a runoff water pipe and a sleeve which is inserted into said runoff inlet and said treated water outlet port is adapted to receiving an output connection device comprising a connection interface with a treated water line and a sleeve which fits into said treated water outlet, the process tank being characterized in that it is adapted to accommodating at least one bypass line disposed outside said process tank and connecting the inlet and outlet connection devices. The installation of the bypass lines outside the treatment tank allows easy access to them.

  Advantageously, the trickle water treatment tank is adapted to receive a separating element separating said treatment tank in two volumes and it comprises a bottom provided with a positioning groove of said separating element, an abutment zone and a lug between which said separating member is inserted.

  The invention also proposes a connection device provided with a connection interface with a water pipe, an insertion sleeve in an orifice of a trickle water treatment tank and at least one connection interface to a bypass line.

  The characteristics of the invention mentioned above, as well as others, will appear more clearly on reading the following description of an exemplary embodiment, said description being made in connection with the attached drawings, among which: FIG. . 1 shows a section of a stormwater treatment tank according to the invention; FIG. 2 represents the perspective water treatment tank; FIG. 3 is a side view of the stormwater treatment tank; FIG. 4 represents a partial section of the stormwater treatment tank; and FIG. 5 is a top view of the stormwater treatment tank.

  Fig. 1 is a sectional view of a runoff treatment tank 100 which includes a runoff inlet 110 and a treated water outlet 112. The water inlet port of runoff 110 is adapted to receive an intake connection device 106 comprising an interface 107 for connection with a runoff water pipe and a sleeve 120 which is inserted into the inlet for the admission of runoff water 110. The treated water outlet orifice 112 is adapted to receive an outlet connection device 108 comprising an interface 111 for connection with a treated water line and a sleeve 122 which is inserted into the outlet orifice of treated water 112. The treatment tank 100 is also able to accommodate at least one bypass line 212a, 212b disposed outside said treatment tank 100 and connecting the inlet connection 106 and outlet connection devices 108.

  The sleeve 120 of the intake connection device 106 is sized to allow the passage of a maximum flow of runoff water. When the maximum flow rate is exceeded, the bypass lines 212a, 212b make it possible to evacuate the runoff water that arrives through the intake connection device 106 to the outlet connection device 108. The bypass lines 212a, 212b are disposed outside the treatment tank 100 to allow easy installation and easy access in case of plugging the bypass pipes 212a, 212b.

  The modular design of the treatment tank 100 makes it possible to construct different treatment tanks 100 with the same elements. For example, it is possible to provide a treatment tank 100 which is associated with a bypass line 212a, or two bypass lines 212a, 212b or none, without having to change the inlet devices 106 and exit 108 and without having to modify neither the internal arrangement of the treatment tank 100 nor its shape.

  The treatment tank 100 comprises in the example of Figs. 1 to 3 a bottom portion 144 which is bounded by a bottom 104 and which includes sidewalls and an upper wall 109. The upper wall 109 is substantially horizontal and is pierced with the water inlet 110 and the outlet orifice of treated water 112. This arrangement of the orifices 110, 112 allows the establishment from the outside of the tank 100 connecting devices 106, 108 generally tubular bent. In particular, this allows the introduction of the inlet connection device 106 upstream of the flow and the output connection device 108 downstream. This arrangement also increases the useful volume of the treatment tank 100 since it can extend to the upper wall 109 and does not stop at the inlet and outlet pipes. When the treatment tank 100 is full, the water can structurally strengthen the upper wall 109 without the need to oversize, thus saving money during manufacture.

  The treatment tank 100 consists of a frame 102 closed at its base by the bottom 104 and which is made for example by rotational molding and inside which are arranged water treatment elements which will be described below. below.

  The particular shape of the inlet connection device 106 facilitates its placement at the inlet port 110. In particular, the penetration of the sleeve 120 into the runoff inlet 110 easily performed by a vertical movement of the inlet connection device 106 and it is not necessary to enter the treatment tank 100 to perform the assembly. In the same way, the inlet connection device 106 is easily removable from the outside of the treatment tank 100 without having to empty it.

  Likewise, the particular shape of the outlet connection device 108 facilitates its installation at the outlet orifice 112. In particular, the penetration of the sleeve 122 into the treated water outlet orifice 112 is effected. easily by a vertical movement of the output connection device 108 and it is not necessary to enter the treatment tank 100 to perform the assembly. In the same way, the output connection device 108 is easily dismountable from outside the treatment tank 100 without having to empty it.

  Fig. 2 shows in perspective the treatment tank 100 where the bypass lines 212a, 212b are disposed above the upper surface 109 to save the volume around the treatment tank 100.

  As seen in FIG. 3, the bypass lines 212a, 212b descend between the inlet connection device 106 and the outlet connection device 108 to allow the entrainment of the water.

  Each connection device 106, 108 is thus provided with an interface 107, 111 for connection with an upstream or downstream water pipe, a sleeve 120, 122 for insertion into an orifice 110, 112 of the treatment tank. 100. To allow connection with the bypass lines 212a, 212b, each connection device 106, 108 is also provided with at least one connection interface to a bypass line 212a, 212b.

  Water treatment elements are provided inside the treatment tank 100. These elements comprise a separation element 124, a vertical tubular element 132 and a first transfer element 138.

  The separating element 124 separates the lower part 144 of the treatment tank 100 into two volumes 116, 118. The water entering the first volume 116 undergoes a settling and the water thus decanted which enters the second volume 118 undergoes a separation of the hydrocarbons it contains.

  The separating element 124 comprises a hollow body 126, a coalescence box 128, a second transfer element 136 between the hollow body 126 and the coalescence box 128, and a wall 114 which prevents the passage of water over the separating element 124. To facilitate the establishment of the separating element 124, it can be provided with slides that slide along the walls of the treatment tank 100 and can be locked in position at using fasteners such as screws.

  The use of screws causes mounting difficulties and a decrease in productivity.

  Fig. 4 represents another method of assembling the separation element 124.

  Although this new method of assembly is presented in a treatment tank 100 able to accommodate external bypass pipes 212a, 212b, it can be used with other treatment tanks whose bypass pipes are arranged inside. of the treatment tank. That is to say that this method of assembly is not limited to a treatment tank according to the invention but can be used in treatment tanks of the state of the art.

  The separating member 124 consists of the wall 114 which supports the hollow body 126, the second transfer member 136 and the coalescence box 128 which has been removed for reasons of clarity. A lower rim 410 extends over the lower portion of the wall 114 and lateral rims 404 extend over the side portions of the wall 114.

  The lower flange 410 is positioned in a groove of the bottom 104 which is formed by two bosses 406, which avoids the displacement of the lower part of the separating element 124.

  The upper surface 109 which is disposed substantially halfway up the frame 102, creates a shoulder 412 inside the treatment tank 100. In order to conform to the shape of the inner walls of the treatment tank 100, the lateral flanges 404 comprise recesses 402 located at this shoulder 412. The recesses 402 thus create substantially horizontal bearing surfaces 414 which cooperate with the shoulders 412 to prevent the vertical displacement of the separating element 124 when the latter is in the La position. Fig. 5 shows the shape of frame 102 seen from above. The frame 102 has a narrowing zone 502 and a widening zone 504 facing each other. The enlargement zone 504 is sufficiently wide to allow passage of the separating element 124, but the narrowing zone 502 is reduced to prevent the passage of the separating element 124. The narrowing zone 502 then serves as an abutment on which the separation element 124 comes to rest.

  The establishment of the separating element 124 then consists of an introduction of the separation element 124 into the treatment tank through the enlargement zone 504 until it comes to block the lower rim 410 between the two projections 406, then the separating element 124 pivots around the lower rim 410 to abut against the narrowing zone 502 while introducing the bearing surfaces 414 under the shoulders 412. The holding in position is provided by a lug 408 which protrudes from the inner walls of the treatment vessel 100 and is disposed opposite to the narrowing zone 502 with respect to the separating element 124. The separating element 124, and in particular the lateral rims 404 are thus sandwiched between the lug 408 and the narrowing zone 502. The narrowing zone 502 may be replaced by a stop.

  The coalescence box 128 comprises a packing which brings together the small particles of hydrocarbons suspended in the water to be treated in large droplets which are lighter than water and which migrate towards the upper part of the water contained in the second volume 118 and gather there. The water that is present in the second volume 118 is thus freed of the hydrocarbons that it contained and which now float on its surface.

  The vertical tubular element 132 is pierced with outlets 146 allowing the passage of the water débourbée and freed of its hydrocarbons. The water then enters the first transfer element 138 and then into the sleeve 122 of the outlet connection device 108. In order to prevent the hydrocarbons floating on the water in the second volume 118 from penetrating into the vertical tubular element 132, a floating float 134 is disposed inside the vertical tubular element 132. The float 134 is calibrated so as to have the same density as the water. It therefore moves with the level of the water 140 and it closes the evacuation orifices 146 at the same time as the water level 140 goes down, thus preventing the penetration of hydrocarbons into the vertical tubular element 132. water decourbée and cleared of hydrocarbons thus enters the vertical tubular element 132 through the evacuation orifices 146 not closed by the float 134.

  The course of the runoff water is represented by the arrows A to D. The runoff water enters the treatment tank 100 through the inlet connection device 106 as shown by the arrow A. The water flows into the sleeve 120 of the inlet connection device 106 and enters the first volume 116 where it is deburred. The water thus decanted enters the hollow body 126 at its upper part as represented by the arrow B. The water then passes through the second transfer element 136 and then the coalescence box 128 to arrive in the second volume 118. water thus freed of its hydrocarbons enters the vertical tubular element 132, as represented by the arrow C, then passes through the first transfer element 138 and then enters the sleeve 122 of the outlet connection device 108. water then emerges from the treatment tank 100 through the outlet connection device 108 as shown by the arrow D. To allow the flow of water between the inlet connection device 106 and the connection device of At exit 108, there is a difference in level between these two elements, that is, the output connection device 108 is placed below the inlet connection device 106.

  To allow the introduction of the water treatment elements contained in the treatment tank 100, an opening is made in the upper surface 109. The treatment tank 100 thus comprises an upper portion 142 provided with a removable cover 148 whose removal allows access to the interior of the lower part 144. That is to say that the inner limit of the upper wall 109 is pierced with an access opening to the interior of the tank 100. The removal of the cover 148 allows access to the lower part 144 and to the different treatment elements that can be so manipulated without the technician needing to go down into the treatment tank 100.

  Preferably, the upper part 142 is raised relative to the upper wall 109 so that, when the lower part 144 is buried in the ground, the upper part 142 comes flush with the ground surface.

  The bypass lines 212a, 212b surround the upper portion 142 to clear access to the interior of the process tank 100.

  The different connections are made in a sealed manner by the use of either truncated cones or joints.

  Of course, the present invention is not limited to the examples and embodiments described and shown, but it is capable of many variants accessible to those skilled in the art.

  For example, the invention has been more particularly described on the basis of a treatment tank whose sleeves 120, 122 connection devices vertically fit into the treatment tank 100, but it can be applied to the tanks of which the sleeves fit horizontally into the treatment tank. The bypass lines are then also disposed outside the process vessel between the inlet and outlet connection devices.

Claims (3)

  1) Runoff treatment tank (100) including a runoff inlet (110) and a treated water outlet (112), said runoff inlet (110) being adapted to receive an intake connection device (106) comprising an interface (107) for connection with a runoff water pipe and a sleeve (120) which is inserted into said inlet port of runoff water (110) and said treated water outlet (112) being adapted to receive an outlet connection device (108) comprising an interface (111) for connection with a treated water line and a sleeve (122) which fits into said treated water outlet (112), the treatment vessel (100) being characterized in that it is adapted to receive at least one bypass pipe (212a, 212b) disposed outside said treatment tank (100) and connecting the docking devices sion (106) and output (108).   2) a trickle water treatment tank (100) according to claim 1, adapted to receive a separating element (124) separating said treatment tank (100) in two volumes (116, 118) and characterized in that it comprises a bottom (104) provided with a groove for positioning said separating element (124), an abutment zone (502) and a lug (408) between which said separating element (124) is inserted.   3) Connecting device (106, 108) having an interface (107, 111) for connection with a water pipe, a sleeve (120, 122) for insertion into an orifice of a treatment tank runoff water (100) and at least one connection interface to a bypass pipe (212a, 212b).