EP0432027B1 - Nettoyeur haute pression équipé d'un ensemble de récupération du liquide de nettoyage et des déchets - Google Patents

Nettoyeur haute pression équipé d'un ensemble de récupération du liquide de nettoyage et des déchets Download PDF

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Publication number
EP0432027B1
EP0432027B1 EP90403428A EP90403428A EP0432027B1 EP 0432027 B1 EP0432027 B1 EP 0432027B1 EP 90403428 A EP90403428 A EP 90403428A EP 90403428 A EP90403428 A EP 90403428A EP 0432027 B1 EP0432027 B1 EP 0432027B1
Authority
EP
European Patent Office
Prior art keywords
cleaner according
pipe
liquid
decanter
suction
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP90403428A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0432027A1 (fr
Inventor
Jean Bonnant
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Orano Demantelement SAS
Original Assignee
Compagnie Generale des Matieres Nucleaires SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Compagnie Generale des Matieres Nucleaires SA filed Critical Compagnie Generale des Matieres Nucleaires SA
Publication of EP0432027A1 publication Critical patent/EP0432027A1/fr
Application granted granted Critical
Publication of EP0432027B1 publication Critical patent/EP0432027B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L11/00—Machines for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L11/29—Floor-scrubbing machines characterised by means for taking-up dirty liquid
    • A47L11/30—Floor-scrubbing machines characterised by means for taking-up dirty liquid by suction
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
    • G21F9/28—Treating solids
    • G21F9/30—Processing
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
    • G21F9/001—Decontamination of contaminated objects, apparatus, clothes, food; Preventing contamination thereof
    • G21F9/005—Decontamination of the surface of objects by ablation

Definitions

  • the invention relates to a high pressure cleaner designed to perform any surface treatment, for example on building facades, this device being particularly suitable for use in a nuclear environment, in particular for treating rough concrete surfaces or screeds without coating and contaminated.
  • a first method of sanitation which consists in degrading the surface by means of a jackhammer, has many drawbacks.
  • the time necessary for the destruction of the surface is relatively long and the intervention equipment as well as the personnel are in direct contact with the contaminated medium.
  • the volume of waste produced also poses the problem of the disposal and containment of this waste.
  • the surface thus treated must be completely redone.
  • a third known technique consists in cleaning up contaminated surfaces using a water jet under high pressure. Apart from the fact that this technique also leads to placing intervention personnel in direct contact with the environment, the projected water poses the double problem of contamination of non-contaminated surfaces and its evacuation. In particular, the structures of certain cells are not adapted to the recovery of effluents and the latter run the risk of blocking the evacuations on the ground when these exist.
  • the document EP-A-0 135 978 proposes a device for decontaminating radioactive surfaces, which uses a hot and pressurized fluid supplied by distributor tubes in a spraying head under vacuum. The effluents are sucked by a tube which conveys them to a recovery system comprising a cyclone separator. Liquid effluents are recovered while the air is rejected after being filtered.
  • document FR-A-2,535,226 proposes decontaminating radioactive surfaces by means of a tool comprising a rotary brush driven by a motor and provided with means for injecting washing liquid.
  • the effluents are sucked up by a pump and sent to a container for storage and treatment of contaminated effluents.
  • US-A-3,073,727 has described a swimming pool cleaning device comprising a central chamber into which an acid is used to clean the walls of the swimming pool and a connected peripheral suction chamber to a pump allowing the cleaning liquid to be sucked in without it being liable to mix with the pool water.
  • the pump sucks an acid solution, that is to say a liquid medium and, moreover, nothing is provided to carry out any treatment on the solution sucked. Consequently, the problem posed by the evacuation of the waste resulting from the cleaning of a surface not submerged by a jet of water under high pressure is not resolved there.
  • the invention specifically relates to a high pressure cleaner for cleaning a non-submerged surface, for example in a nuclear environment, ensuring the recovery of effluents, regardless of the nature of the contaminated medium and possibly remotely, for example by means of a remote manipulator.
  • a high-pressure cleaner comprising a cleaning head comprising a central cleaning chamber delimited by an intermediate wall and into which opens a pipe for injecting a cleaning liquid, and a peripheral effluent rebreathing chamber formed between the intermediate wall and an outer wall and into which opens a suction pipe connected to suction means, characterized in that the suction means are incorporated in a recovery assembly effluent which comprises a decanter tank in the upper part of which open said suction pipe and a pipe for discharging gaseous effluents communicating with the suction means, a tube for discharging liquid effluents connected to means pumping plunging near the bottom of the decanter, inside an organ e annular filtering retaining solid effluents.
  • a recovery assembly effluent which comprises a decanter tank in the upper part of which open said suction pipe and a pipe for discharging gaseous effluents communicating with the suction means, a tube for discharging liquid effluents connected
  • the decanter tank is a cylindrical tank, with a vertical axis, into which the suction pipe opens in a circumferential direction, so as to initiate a cyclone effect.
  • Liquid-gas separation means as well as filtration means can be placed in the exhaust gas evacuation pipe, a liquid phase recycling pipe connecting a storage pot associated with said liquid-gas separation means to the tank decanter.
  • the pumping means can be triggered automatically by a high liquid level detector placed in the decanting tank.
  • the outer wall of the cleaning head is able to cooperate with a surface to be cleaned by sealing means and the intermediate wall is then spaced from this same surface to delimit a passage through which the central cleaning chamber communicates permanently. with the peripheral rebreathing chamber.
  • the injection pipe opens into the cleaning chamber by a rotating nozzle whose rotation is controlled by the flow of the cleaning liquid, this nozzle having at least two orifices oriented in such a way that the jets from these orifices hit the surface to be cleaned in the immediate vicinity of the passage.
  • the improvement of the safety of the intervention personnel is advantageously obtained by connecting the cleaning head to a control gun by a maneuvering pole constituting the injection pipe, a high pressure generator supplying the control gun with cleaning liquid. .
  • the high pressure cleaner mainly comprises a cleaning assembly generally designated by the reference 10 and a set of recovery of effluents generally designated by reference 12.
  • the cleaning assembly 10 comprises a high pressure generator 14, of conventional design, delivering water under high pressure, which is sent to a control gun 16 through a flexible hose 18.
  • the control gun 16 is connected to a cleaning head 20 by a rigid operating pole 22 whose length can be, for example, at least 1.50 m.
  • the operating pole 22 internally delimits an injection pipe 24 for pressurized water, the water supply of which is controlled by a control member such as a trigger placed on the control gun 16.
  • the end of the operating pole 22 supporting the cleaning head 20 is provided with a nozzle 26 through which the injection pipe 24 defined inside the pole 22 opens into the cleaning head 20.
  • the nozzle 26 is rotatably mounted at the end of the operating pole 22, and it is pierced with two holes 28 whose orientation is inclined relative to the 'axis of the nozzle, which has the effect of causing an automatic rotation of the nozzle 26 when water under high pressure is admitted into the injection pipe 24.
  • the operating pole 22 is folded near its end carrying the cleaning head 20, so that the latter can be easily applied against a surface to be cleaned S when the gun 16 is held by an operator.
  • the cleaning head 20 mainly comprises a substantially frustoconical outer wall 30, the end of which is of smaller diameter is fixed to the end of the operating pole, for example by a base 32.
  • the opposite end of the frustoconical outer wall 30 is open and reinforced externally by a ring 34 on which are mounted three rollers 36 suitable for being applied against the surface S to be cleaned and of which only one is shown in FIG. 2
  • the crown 34 also supports, on the side of the surface S, an annular sealing member 38 constituted for example by a brush making it possible to confine the volume delimited inside the wall 30 relative to the outside of this wall. .
  • the cleaning head 20 also comprises an intermediate wall 40, also of substantially frustoconical shape, placed inside the volume delimited by the external wall 30 and whose end of smaller diameter is fixed on the base 32, around the rotary nozzle 26.
  • the larger diameter end of the intermediate wall 40 is open and located at a given distance d from the surface S to be cleaned when the rollers 36 are in contact with this surface. There is thus defined, between the edge of the intermediate wall 40 adjacent to the surface S and this latter surface, an annular passage 42 by which a central cleaning chamber 44 formed inside the intermediate wall 40 communicates permanently with a chamber. effluent rebreathing device 46 formed between the intermediate wall 40 and the outer wall 30.
  • the jets of water under high pressure leaving the orifices 28 of the rotating nozzle 26 strike the surface S to be cleaned in the immediate vicinity of the passage 42, that is to say say near the end of larger diameter of the intermediate wall 40.
  • the recovery of the effluents that constitute water and the resulting waste cleaning of the surface S is easily carried out through the passage 42, then through the chamber 46.
  • the external wall 30 comprises a tube 50 to which is connected a suction pipe constituted by a flexible pipe 52.
  • the recovery assembly 12 firstly comprises a decanter tank 54 advantageously constituted by a cylindrical tank, of vertical axis, the bottom 54a of which is slightly sloping towards the axis of this tank.
  • the tank 54 is sealed and its cylindrical wall is crossed, near its upper end, by an effluent inlet pipe 56 to which the flexible pipe 52 is connected. More precisely, the end of this pipe 56 located inside the decanter tank 54 is curved in a substantially circumferential direction so as to initiate a cyclone effect when the effluents arrive via the flexible pipe 52 in the decanter tank.
  • a pipe 58 for evacuating gaseous effluents also opens into the upper part of the decanter tank 54, through the cover of the latter, in a location substantially diametrically opposite to the pipe 56.
  • This pipe 58 extends to a vacuum cleaner tire 72 by successively passing through a water separator 60 and filters 70.
  • a storage pot 62 Inside the water separator 60, the microdroplets of liquid entrained by the air flow are separated from the latter and collected in a storage pot 62.
  • This storage pot 62 is placed at a level higher than that of the settling tank 54 and it is connected to the latter by a recycling line 64 controlled by a valve 66 normally closed.
  • the pipe 64 passes tightly through the cover of the decanting tank 54, and opens into the bottom of the storage pot 62, so that the latter is automatically emptied into the decanting tank when the valve 66 is opened.
  • Filters 70 are nuclear grade filters used to retain solid particles possibly entrained by the gaseous effluents.
  • the pneumatic vacuum cleaner 72 operates by venturi effect, by means of a compressed air injection pipe 74 controlled by a valve 76.
  • the opening of this valve has the effect of injecting compressed air into the vacuum cleaner 72, which creates a vacuum through which the effluents from the cleaning head 20 are sucked by the peripheral chamber 46, the suction line 52, the decanter tank 54 and the line 58, passing through the separator 60 and the filters 70.
  • the compressed air injected into the vacuum cleaner 72 through the piping 74 mixes with the air sucked through the pipe 58 to be discharged outside through a pipe 78.
  • the part of the recovery assembly 12 which has just been described makes it possible, by means of the vacuum cleaner 72, to create a sufficient vacuum to suck up the effluents produced by the cleaning head 20, that is to say the liquid. cleaning and waste resulting from the impact of this liquid on the surface S.
  • These effluents which contain both a gaseous phase, a liquid phase and a solid phase, are first separated in the decanter tank 54 which retains most of the liquid and solid phases.
  • the small part of the liquid phase remaining in the gas phase is recovered by the separator 60 and the small part of the solid phase remaining in the gas phase is recovered by the filters 70.
  • the recovery assembly 12 also makes it possible to separate the liquid and solid phases retained in the decanter tank 54.
  • a vertical tube 80 disposed along the axis of the tank 54 passes through the cover of the latter in a sealed manner and plunges near the bottom 54a of this tank.
  • This tube 80 communicates at its upper end with a hydro-ejector 82 placed in a circuit 84, connected upstream of the hydro-ejector 82, to a source 86 of pressurized water.
  • Valves 88 and 90 normally closed, are placed in the circuit 84 respectively upstream and downstream of the hydro-ejector 82. This arrangement makes it possible, when the valves 88 and 90 are opened, to suck the liquid contained in the decanter tank 54 in order, for example, to recycle it.
  • the latter contains an annular filter 92, made for example of packed polyester wool, which extends over the entire height of the tank around the dip tube 80.
  • This filter 92 can in particular be placed between two concentric perforated sheets which provide mechanical support without preventing the flow of water.
  • the coarse dirt settles at the bottom of the tank 54 and the water migrates through the filter 92 which offers little resistance to water while retaining the dirt.
  • the tube 80 only sucks water loaded with very fine particles.
  • the vacuum cleaner 72 In order for the water contained in the decanter tank 54 to be emptied, the vacuum cleaner 72 must be stopped. Consequently, the valves 88 and 90 controlling the suction of the water recovered in the tank 54 are normally closed when the vacuum cleaner 72 works. When the tank 54 is filled with water, the valve 76 controlling the actuation of the vacuum cleaner 72 is closed in turn before the valves 88 and 90 are opened.
  • a high liquid level detector 94 is placed in the upper part of the decanter tank 54 which can be simply connected to an alarm warning the operator of the need to empty the decanter tank, or which can automatically trigger the closure valve 76 followed by the opening of valves 88 and 90, thus making the operation of the automatic cleaner.
  • a safety device has also been provided which makes it possible to automatically shut off the inlet of the pipe 58 by which the air is sucked out of the settling tank, in the case where the level detector 94 would be faulty and also in order to overcome any non-compliance with the alarm triggered by this detector.
  • This safety device comprises a floating ball 96 which is placed in a perforated cage 98 situated in the extension of the pipe 58, immediately below the cover of the decanter tank 54. When the level in the tank 54 rises abnormally , the floating ball 96 comes to close the lower end of the pipe 58. The vacuum created by the vacuum cleaner 72 then keeps this ball in the closed position of the pipe 58, while all suction ceases in the peripheral rebreathing chamber 46 of the cleaning head 20.
  • the high-pressure cleaner according to the invention makes it possible to solve the problem posed by the waste produced by the recuperator in a simple and effective manner.
  • this waste is separated according to their nature, so that some of them can be recycled or disposed of without risk to the intervention personnel.
  • the design of the cleaning assembly 10 allows intervention personnel to work at a relatively large distance from the surface to be cleaned and even authorizes the replacement of this personnel by a remote handling device such as a remote manipulator. .
  • the high pressure cleaner according to the invention can be used regardless of the nature of the medium which it is desired to clean, since the separation of the different phases carried out in the recovery assembly 12 makes it possible to control particularly efficiently the management of effluents.
  • this device has the advantage of all existing high pressure cleaners which consists in not degrading the surfaces thus sanitized, which eliminates the need to redo these surfaces after intervention.
  • the invention is not limited to the embodiment which has just been described by way of example, but covers all its variants.
  • the recovery assembly described can be used with a high pressure cleaner comprising a cleaning head with a structure slightly different from that which has been described.
  • the means used to separate the different phases of the recovered effluents can undergo certain modifications without departing from the scope of the invention as claimed.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Food Science & Technology (AREA)
  • Cleaning In General (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Filters For Electric Vacuum Cleaners (AREA)
EP90403428A 1989-12-04 1990-12-03 Nettoyeur haute pression équipé d'un ensemble de récupération du liquide de nettoyage et des déchets Expired - Lifetime EP0432027B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8915970 1989-12-04
FR8915970A FR2655470B1 (fr) 1989-12-04 1989-12-04 Nettoyeur haute pression equipe d'un ensemble de recuperation du liquide de nettoyage et des dechets.

Publications (2)

Publication Number Publication Date
EP0432027A1 EP0432027A1 (fr) 1991-06-12
EP0432027B1 true EP0432027B1 (fr) 1995-02-15

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ID=9388105

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90403428A Expired - Lifetime EP0432027B1 (fr) 1989-12-04 1990-12-03 Nettoyeur haute pression équipé d'un ensemble de récupération du liquide de nettoyage et des déchets

Country Status (7)

Country Link
US (1) US5125126A (ja)
EP (1) EP0432027B1 (ja)
JP (1) JP2843683B2 (ja)
KR (1) KR910011210A (ja)
DE (1) DE69016961T2 (ja)
ES (1) ES2068363T3 (ja)
FR (1) FR2655470B1 (ja)

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Also Published As

Publication number Publication date
FR2655470A1 (fr) 1991-06-07
JP2843683B2 (ja) 1999-01-06
KR910011210A (ko) 1991-08-07
EP0432027A1 (fr) 1991-06-12
US5125126A (en) 1992-06-30
DE69016961D1 (de) 1995-03-23
DE69016961T2 (de) 1995-09-07
FR2655470B1 (fr) 1994-04-15
JPH04118082A (ja) 1992-04-20
ES2068363T3 (es) 1995-04-16

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