FR2494744A1 - METHOD AND DEVICE FOR RECOVERING A FRESHLYLY POLLUTED PRODUCT REMOVED FROM A BEACH - Google Patents

Abstract

THE INVENTION CONCERNS A PROCESS AND A DEVICE FOR RECOVERING A VISCOUS POLLUTING PRODUCT FRESHLY DEPOSITED ON A BEACH, BY WHICH A SURFACE ELEMENT 1A IS APPLIED UNDER PRESSURE ON THE SAID BEACH HAVING SELECTIVE RETAINING MEANS OF THE PRODUCT FROM THE SAND, IN THAT THE SURFACE ELEMENT IS REMOVED FROM THE SOIL, IN THAT THE PARTS OF PRODUCT THAT ADHERE TO IT ABOVE A RECOVERY AND DRAINAGE DEVICE LOCATED BETWEEN THE SOIL AND SUCH ELEMENT AND IN WHAT ARE CONTINUOUSLY REPEATED THESE OPERATIONS BY MEANS OF A PLURALITY OF SUCCESSIVE SURFACE ELEMENTS AND JUXTAPOSED IN AN ENDLESS BAND 1. APPLICATION TO SIDE DEPOLLUTION.

Description

Method and device for recovering a fresh air pollutant

  The cleaning of beaches from which the sea has deposited, a pollutant such as crude oil has been achieved so far either manually or by means of gear

public works.

  These methods have serious disadvantages

  essentially because with the removal of the pol-

  As a result, an enormous amount of sand is removed. We know that the reconstruction

  The natural formation of a sandy beach is extremely long; in some cases even, the movements of the sea accentuate the process of degradation of the beach instead of remedying it. We also know

  soiled sand is an important volume that needs to be trans-

  carry up to a treatment unit to separate it from the oil or neutralize it. This volume has a significant impact on the overall cost of the operation. In addition, the intervention of a large number of devices on a beach contributes to deteriorate its surface state by creating numerous and deep ruts while mixing

  significant quantities of hydrocarbons.

  The present invention intends to remedy these drawbacks.

  by providing a method and a device for cleaning a beach or the like for which it is possible to collect

  selective pollutant product compared to sand and so to re-

  considerably, the quantity of sand transported and to facilitate the treatment of the product. The invention thus allows

  significantly reduce the cost of such an operation.

  For this purpose, it is therefore primarily a process for recovering a pollutant viscous product, as is the crude oil, freshly deposited on a beach. According to one of

  main features of this process, it is applied under

  on said beach a surface element having means for selectively retaining the product with respect to the sand. The surface element is then removed from the ground, and the adhering product parcels are detached above a recovery and disposal device situated between the ground and the said element, and finally, it is repeated

  these operations continuously by means of a plurality of

  successive surfaces and juxtaposed in an endless band.

  Optionally, said surface element is animated

a speed relative to the ground.

  Another object of the invention resides in a

  positive to implement the above method characterized in that it consists of: a collector material in the form of an endless band, comprising means for fastening the pollutant on at least one of its faces and mounted around at least one cylinder, by frame means for rotatably supporting said cylinder, coupling it to a tractor device selectively in a trailed or carried position; by a cleaning device carried by said frame means and held in contact with the endless material along a line fixed relative to the frame, located above the horizontal diameter of said cylinder and at the rear thereof; by a device for recovering and discharging the product parcels collected and detached by the cleaning device,

  located in the vicinity of the lower rear portion of said cylinder.

  In addition, an auxiliary device of

  recovery of the product spontaneously detaching from the material

  reader located in the vicinity and under the rising rear portion of said cylinder. In a first embodiment, the aforesaid material is a strip of a flexible plastic material provided on one side.

of its faces of protuberances.

  In a second embodiment, the material

  aforesaid is a strip of a perforated product deployed in stitches.

  Finally, the aforesaid material can be a material to

  short hairs of the carpet or synthetic turf type.

  Moreover, the above-mentioned cleaning device may be a rotating brush rotating in the opposite direction to that

  of the collector material or a metal scraper blade

  plastic or pneumatic material.

  Finally, it will be advantageous to provide that the aforesaid cylinder is rotated so as to:

  keep it rotating regardless of the resistance due to the

  to create a slight slip (in the direction of rotation) of the

aforesaid tape on the floor.

  The invention will be better understood during the

  description given below as a purely indicative example

  and not limiting, which will make it possible to identify the advantages and

secondary characteristics.

  Reference will be made to the accompanying drawings in which: - Figure 1 is a block diagram illustrating the method and the device according to the invention; FIG. 2 is a same diagram of an alternative embodiment of FIG. 1;

  FIGS. 3 and 4 illustrate two ways of using

  possible implementation of the device of the invention.

  Referring firstly to FIGS. 1 and 2, it can be seen that the device according to the invention consists essentially of a material 1 in an endless belt wound around a cylinder 2 (FIG. 1) or two cylinders 3 and 4 (Figure 2) mounted

  rotating on a frame 2A with optional intermediate rollers 2B.

  This material may be a synthetic mat, or other flexible hydrocarbon-resistant plastics having on its outer surface protuberances whose height, surface density and shape are determined (by

  tests) as an effective means of

  viscous pollutant product (hydrocarbons) generally in the form of relatively flat amalgams. It may also be a grid made, for example, of expanded metal of which

  the meshes constitute polygonal cells for retaining the pol-

  luant. It may finally consist of a flush-type covering carpet or artificial grass whose bristles constitute said retaining means. It is with the aim of being able to intervene in the maximum of cases of pollution by a viscous product that have been retained these different collector materials and their

  interchangeability, the use of these different

  to be adapted to the type of pollution that presents itself (para.

  determining meter being the thickness of the deposit).

  Thus, as provided on this or these cylinders, said material is applied to the ground (generally a sand beach) by successive surface elements, the rolls being

  rolled without or with a slight slip on the sand. Each element

  surface is therefore brought into contact with the pollutant which is on its path under a certain pressure (corresponding

  the weight of the device possibly increased by an application force

  additional cation) for a time that depends on the speed of movement of the device and the conformation (with single cylinder or "caterpillar") of the strip. Under this pressure and during this time of contact, the pollutant adheres to the band by its retaining means, causing only a thin thickness of the sand

  underlying. Outside the polluted area, the amount of sand collected

lectée is negligible.

  The friction forces are sufficient (because the retaining means have been chosen accordingly) for

  the back of roll 1 or 4 (if the direction of travel is A) the

  duit collected can take off the ground with the band. This last

  then passes in front of a cleaning device 5 which takes off the

  tape to fall into a recovery device.

  ration and evacuation 6 symbolized here in the form of a transverse treadmill. A cover 7 contains the projections of the product

detached from the band.

  The cleaning device 5 will be adapted to the band.

  It may be a rotating brush with metal fingers

  flexible strips in direction B for a protuberated strip

  rancid. Advantageously, the contact zone 8 between the band and the brush will be located at the rear and above the horizontal diameter of the cylinder 1 or 4, so that the brushed product falls on the conveyor belt 6. It can be provided for a band of openwork material, or of material with short bristles, a scraper blade not shown fixed or adjustable associated or not with another brush-type brush for

  complete the cleaning. In the case of a strip of material

  perforated reader, such as expanded metal, it is possible to install

  cylinder of a fixed or moving doctor blade (cylindrical roller

  rotating nozzle) or pneumatic nozzles that would drive the

  embedded in said cells. An outer brush or squeegee may be considered, associated with the previous inner device.

  A recovery device will also be provided.

  9, also represented in the form of a transpor-

  endless, placed in the vicinity of the rising portion of the cylinder 1, 4 to collect the plots of product that would detach from the collector band 1 under the effect of gravity. This device could be a simple curved blade parallel to the generator of the

collecting cylinder.

  The method and device according to the invention is

  especially with regard to viscous

  in surface on the beaches. These are therefore superficial, little contagious

  mined by other foreign elements under the effect of the mixing of successive tides. It should also not be embedded in the sand before collection. Also, the device according to the invention is adapted to be placed laterally (Figure 3) on a tractor, or frontally (Figure 4). The set of rollers 1 or 3, 4 of the brush 5 of the recuperators 6 and 9 are integral with a frame 10 which

  can be tacked either at the three-point rear of a tractor 11 (

  gure 3) in an offset> to front lift arms (figure 4).

  With this type of use, we are assured that letractor 11 will roll

on already cleared land.

  In some cases, it may be advantageous to create

  in the direction of rotation of the cylinder or cylinders, a sliding of the

riau in band 1 on the ground.

  For this purpose, the roll 1 will be rotated

  or one of the cylinders 3 or 4 by means of a feed drive member

  mented by an energy source (eg hydraulic) belonging to

  in a manner known to the tractor. Finally, we will be able to adjust the force of ap-

  of the belt 1 on the ground by means of lifting devices for the front, otherwise we will use additional masses for

the rear.

  There will also be a device for

  wise of the cleaning device itself which can, for example, be

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  constituted by a fixed comb 12 secured to the cover 7 for the brush

  metal, as well as another device 13 for scrubbing the coating

  protuberances of the comb type located just behind the line

  contact of the teeth of the brush with the protuberances. The provision

  evacuation system 6 will be extended with a suitable conveyor belt

  to convey the pollutant into a receptacle according to the trac-

  1l in his evolution on the beach.

  The invention finds an interesting application

in the field of depollution.

  It is not limited to the description that comes

  to be given, but covers, on the contrary, all variants that could be made without departing from its scope or its spirit. Finally, it has the advantage of being simple and quick to implement, to adapt to any agricultural tractor and

  to be a very simplified maintenance gear very simplified.

Claims (12)

R E V E N D I C A T I 0 N S   l, Process for recovering a polluting product   deposited on the surface of a beach, characterized in that   applies pressure to said area a surface element pos-   selective means for selectively retaining the product with respect to the sand, in that said surface element is removed from the ground,   what is detached from the plots of product that adhere to it   above a recovery and disposal device located between the ground and said element and in that it is repeated continuously   these operations by means of a plurality of successive surface elements   sive and juxtaposed into an endless band.   2. Method according to claim 1, characterized in that one animates said surface element of a speed relative to the ground. 3. Device for implementing the method according to   any of claims 1 and 2, characterized in that   is constituted by a material in the form of an endless band, comprising means for hooking the pollutant on at least one of its faces, and wound around at least one cylinder by means of frame for rotatably supporting said cylinder, coupling it to a tractor device selectively in a trailed or worn position, by a cleaning device carried by said frame means and held in contact with the endless material along a   fixed line to the frame, located above the horizontal diameter   tal of said cylinder and at the rear thereof and by a device for recovering and discharging the product parcels collected and detached by the cleaning device, located in the vicinity of the   lower rear portion of said cylinder.   4. Device according to claim 3, characterized in that it comprises an auxiliary device for recovering the product spontaneously detaching the collector material located in the vicinity   and under the rising rear portion of said cylinder.   5. Device according to any one of claims 3   and 4, characterized in that the aforesaid material is a strip of material   soft, oil-resistant plastic material, provided on the face   external regularly distributed protuberances.   6. Device according to any one of claims 3   and 4, characterized in that the aforesaid material is a strip of a perforated duit deployed in mesh.   7. Device according to any one of claims 3   and 4, characterized in that said aforesaid material is a material to short hair.   8. Device according to any one of claims 3   at 7, characterized in that the cleaning device is constituted by a rotating brush whose peripheral speed is of sense   contrary to that of scrolling of the collecting material.   9. Device according to any one of claims 3   to 8, characterized in that the aforesaid cleaning device comprises for the deslagging a fixed toothed blade situated in the vicinity of the lower back part.   10. Device according to any one of the claims   3 to 5, characterized in that the slaking of the protector material   beries can be provided by a device type comb.   11. Device according to any one of claims 3   at 4, 6 and 7, characterized in that the cleaning device is a   metal blade, made of plastic or pneumatic material.   12. Device according to any one of claims 3   to it, characterized in that the aforesaid cylinder is rotated tion.