WO2003080261A1 - Method of cleaning containers and piping systems which are contaminated with organic substances through the application of vapour-phase solvents - Google Patents

Method of cleaning containers and piping systems which are contaminated with organic substances through the application of vapour-phase solvents Download PDF

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Publication number
WO2003080261A1
WO2003080261A1 PCT/ES2003/000107 ES0300107W WO03080261A1 WO 2003080261 A1 WO2003080261 A1 WO 2003080261A1 ES 0300107 W ES0300107 W ES 0300107W WO 03080261 A1 WO03080261 A1 WO 03080261A1
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Prior art keywords
solvent
contaminated
installation
dissolution
cleaning
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PCT/ES2003/000107
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Spanish (es)
French (fr)
Inventor
Evaristo Fontecha Cuetos
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Evaristo Fontecha Cuetos
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Priority to AU2003214268A priority Critical patent/AU2003214268A1/en
Publication of WO2003080261A1 publication Critical patent/WO2003080261A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto 
    • B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
    • B08B9/027—Cleaning the internal surfaces; Removal of blockages
    • B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/04—Cleaning involving contact with liquid
    • B08B3/08—Cleaning involving contact with liquid the liquid having chemical or dissolving effect
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto 
    • B08B9/08—Cleaning containers, e.g. tanks
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G5/00—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G5/00—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents
    • C23G5/02—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents using organic solvents
    • C23G5/04—Apparatus

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Cleaning By Liquid Or Steam (AREA)

Abstract

The invention relates to a method of cleaning containers and piping systems which are contaminated with organic substances through the application of vapour-phase solvents. The inventive method comprises the following operations: vaporisation of the solvent in a vacuum heating tank, injection of the vaporised solvent into the installation and dissolution of the contaminant, suction and filtration of the dissolution, in situ recovery of the contaminated solvent, treatment of emission gases and ventilation of the installation. Said method is characterised in that it involves the use of a vacuum pump which performs the following functions, namely: maintaining the vacuum in the vaporisation tank, injecting the solvent vapour into the installation, forcing the suction and filtration of the dissolution, and enabling the recovery of the contaminated solvent by vacuum distillation. The invention is suitable for cleaning storage tanks, land and sea transport tanks, oil pipelines, piping systems and treatment units.

Description

DESCRIPCIÓN DESCRIPTION
Procedimiento de limpieza de recipientes y circuitos de tubería contaminados por sustancias orgánicas mediante la aplicación de disolventes en fase vapor.Procedure for cleaning containers and piping circuits contaminated by organic substances by applying solvents in the vapor phase.
OBJETO DE LA INVENCIÓNOBJECT OF THE INVENTION
La presente invención, tal como se expresa en el enunciado de esta memoria descriptiva, describe un procedimiento de limpieza con vapor de disolvente aplicable a recipientes y circuitos de tubería contaminados por sustancias orgánicas.The present invention, as expressed in the statement of this specification, describes a solvent steam cleaning procedure applicable to containers and pipe circuits contaminated by organic substances.
Entre las sustancias orgánicas susceptibles de descontaminación con el procedimiento, cabe señalar aquellas que por su untuosidad o viscosidad presentan mayores dificultades en su extracción y limpieza (crudo de petróleo, fuelóleos, asfaltos, grasas, ceras, resinas, etc.).Among the organic substances susceptible to decontamination with the procedure, it is worth mentioning those that due to their unctuousness or viscosity present greater difficulties in their extraction and cleaning (crude oil, fuel oils, asphalts, fats, waxes, resins, etc.).
Entre los recipientes y conducciones en que el procedimiento encuentra aplicación, cabe destacar los siguientes: tanques de almacenamiento, cisternas de transporte marítimo y terrestre, oleoductos, circuitos de tubería y unidades de proceso.Among the vessels and pipes in which the procedure is applicable, the following are worth mentioning: storage tanks, maritime and land transport tanks, pipelines, pipe circuits and process units.
ESTADO DE LA TÉCNICASTATE OF THE TECHNIQUE
A la fecha de presentación de la presente invención, el procedimiento de limpieza profusamente extendido es la limpieza con agua a presión. Inconvenientes de dicha limpieza, resueltos por el procedimiento objeto de esta patente, son los siguientes: Largos períodos de indisponibilidad de la instalación ocasionados por las operaciones de andamiaje y lavado de extensas superficies.At the date of presentation of the present invention, the widely used cleaning procedure is cleaning with pressurized water. Disadvantages of such cleaning, resolved by the procedure object of this patent, are the following: Long periods of unavailability of the installation caused by scaffolding and washing of large surfaces.
Impedimentos en la limpieza de superficies de difícil acceso (dobles fondos, tuberías enterradas, etc.).Impediments in cleaning hard-to-reach surfaces (double bottoms, buried pipes, etc.).
Exposición continuada de operarios a los aerosoles contaminantes generados por el agua a presión y el empleo de aditivos desengrasantes.Continuous exposure of operators to polluting aerosols generated by pressurized water and the use of degreasing additives.
Inicio de procesos de corrosión provocados por la alta humedad intrínseca a las limpiezas acuosas.Start of corrosion processes caused by high humidity intrinsic to aqueous cleaning.
Generación de cantidades ingentes de residuos en forma de aguas aceitosas con aditivos desengrasantes. En refinerías, para la extracción y recuperación de los lodos aceitosos remanentes en los tanques, se están imponiendo procedimientos que evitan en gran medida la entrada de operarios al tanque. Con sus distintas peculiaridades, estos procedimientos se fundamentan en la inyección de crudo de petróleo caliente al tanque. El crudo caliente inyectado provoca la disolución del contenido orgánico de los lodos, lo que permite la extracción selectiva de dicha materia orgánica y proceder al envío de la disolución a otro tanque de almacenamiento o bien directamente a proceso de refino. Los procedimientos anteriores no resuelven el desengrase del tanque, que continúa realizándose con agua a presión, y por tanto se pueden complementar con el procedimiento objeto de esta patente.Generation of huge amounts of waste in the form of oily waters with degreasing additives. In refineries, for the extraction and recovery of the remaining oily sludge in the tanks, procedures are being imposed that largely prevent the entry of operators to the tank. With their different peculiarities, these procedures are based on the injection of hot oil crude into the tank. The hot crude injected causes the dissolution of the organic content of the sludge, which allows the selective extraction of said organic matter and proceed to send the solution to another storage tank or directly to the refining process. The above procedures do not solve the degreasing of the tank, which continues to be carried out with pressurized water, and therefore can be complemented with the procedure object of this patent.
DESCRIPCIÓN DE LA INVENCIÓNDESCRIPTION OF THE INVENTION
La presente invención describe un procedimiento de limpieza de recipientes y circuitos de tubería, que comprende la práctica de las operaciones siguientes: Vaporización del disolvente en una vasija de calentamiento en depresión;The present invention describes a procedure for cleaning vessels and tubing circuits, which includes the practice of the following operations: Vaporization of the solvent in a heating vessel in depression;
Inyección del vapor de disolvente al interior de la instalación y disolución del contaminante;Injection of solvent vapor into the installation and dissolution of the contaminant;
Aspiración, filtrado y retorno de la disolución a la vasija de vaporización; Manteniéndose la anterior secuencia de operaciones hasta la completa disolución del contaminante, procediendo a continuación con las operaciones siguientes:Aspiration, filtration and return of the solution to the vaporization vessel; Maintaining the previous sequence of operations until the complete dissolution of the contaminant, then proceed with the following operations:
Aspiración y filtrado del disolvente remanente en el tanque;Aspiration and filtering of the remaining solvent in the tank;
Ventilación de la instalación y tratamiento de gases de emisión. El procedimiento comprende el control y tratamiento de gases de emisión en el transcurso de la limpieza. La forma más sencilla de controlar las emisiones consiste en hermetizar la instalación, pero en la práctica no siempre es posible o implica que se produzcan variaciones de presión, que pueden llegar a ocasionar daños estructurales en la instalación. Un método alternativo a la hermetización del tanque, resulta de la disposición de una línea de aire y una unidad de tratamiento de gases de emisión, de modo que las variaciones de presión sean neutralizadas con la evacuación o entrada de aire en la instalación, y los gases de emisión sean liberados a la atmósfera tras su paso por la unidad de tratamiento.Ventilation of the installation and treatment of emission gases. The procedure includes the control and treatment of emission gases during the course of cleaning. The easiest way to control emissions is to seal the installation, but in practice it is not always possible or implies that pressure variations occur, which can lead to structural damage to the installation. An alternative method to sealing the tank results from the provision of an air line and an emission gas treatment unit, so that the pressure variations are neutralized with the evacuation or entry of air into the installation, and the Emission gases are released into the atmosphere after passing through the treatment unit.
El procedimiento también comprende la recuperación "in situ" del disolvente contaminado mediante la secuencia de operaciones siguientes:The process also comprises "in situ" recovery of the contaminated solvent by the following sequence of operations:
Llenado de la vasija de calentamiento con el disolvente contaminado y cierre de las líneas de aspiración de la disolución;Filling the heating vessel with the contaminated solvent and closing the suction lines of the solution;
Destilación en vacío de la carga de disolvente contaminado e inyección del vapor de disolvente generado al interior de la instalación;Vacuum distillation of the contaminated solvent load and injection of the solvent vapor generated inside the installation;
Conexión del sistema de agitación de la vasija de calentamiento para mejora del rendimiento de destilación; Manteniéndose la destilación en vacío de la carga hasta la práctica eliminación del disolvente, pudiendo proceder a continuación a la evacuación de la sustancia orgánica y al tratamiento de una nueva carga de disolvente.Connection of the stirring system of the heating vessel to improve distillation performance; Maintaining the distillation under vacuum of the load until the practical elimination of the solvent, being able to proceed then to the evacuation of the organic substance and to the treatment of a new solvent load.
El procedimiento se caracteriza por la utilización de una bomba de vacío que realiza las funciones siguientes:The procedure is characterized by the use of a vacuum pump that performs the following functions:
Mantiene en depresión la vasija de calentamiento, la unidad filtrante y el circuito de aspiración. Se eliminan así riesgos de fuga accidental de disolvente, que puedan afectar a los operarios y provocar emisiones a la atmósfera. Adicionalmente, según la ecuación de estado PV = nRT, a menor presión en la vasija corresponde menor temperatura de ebullición del disolvente. Por tanto en depresión se evita someter el disolvente a elevadas temperaturas de ebullición que puedan afectar su estabilidad. Inyecta a la instalación el disolvente en fase vapor y aspira el disolvente condensado. La descarga de la bomba de vacío inyecta el vapor de disolvente a la instalación y su aspiración fuerza el filtrado y retorno de la disolución a la vasija de vaporización.It keeps the heating vessel, the filter unit and the suction circuit in depression. This eliminates risks of accidental solvent leakage, which may affect operators and cause emissions to the atmosphere. Additionally, according to the equation of state PV = nRT, the lower the pressure in the vessel corresponds to the lower boiling temperature of the solvent. Therefore in depression it is avoided to subject the solvent to high boiling temperatures that may affect its stability. Inject the solvent into the vapor phase and aspirate the condensed solvent. The discharge of the vacuum pump injects the solvent vapor into the installation and its aspiration forces the filtering and return of the solution to the vaporization vessel.
Permite la recuperación "in situ" del disolvente contaminado. La recuperación del disolvente contaminado se realiza por destilación en vacío y utilizando como condensador la propia instalación en limpieza.It allows the recovery "in situ" of the contaminated solvent. The recovery of the contaminated solvent is carried out by vacuum distillation and using the cleaning facility itself as a condenser.
El procedimiento de limpieza de tuberías es análogo, salvo en la conexión de líneas, al de limpieza de recipientes. La línea de inyección de vapor de disolvente se ha de conectar al extremo de la tubería de mayor cota y la línea de aspiración del disolvente condensado al extremo opuesto. En el caso de circuitos de tuberías puede resultar necesario realizar la limpieza por tramos. La vasija de calentamiento específica para aplicación del procedimiento, debe de estar diseñada para tolerar condiciones de vacío y ha de disponer de los siguientes elementos: un sistema de calentamiento para vaporización del disolvente; un sistema de agitación para la fase de recuperación del disolvente; tubuladuras y válvulas para las diversas conexiones; manómetro, termómetro e indicador de nivel; y un automatismo de seguridad que desconecte el sistema de calentamiento cuando la presión en la vasija supere la depresión prefijada.The pipe cleaning procedure is analogous, except in the connection of lines, to the cleaning of vessels. The solvent vapor injection line must be connected to the end of the highest dimension pipe and the condensed solvent suction line to the opposite end. In the case of pipe circuits, it may be necessary to perform the cleaning by sections. The specific heating vessel for application of the procedure must be designed to tolerate vacuum conditions and must have the following elements: a heating system for vaporization of the solvent; a stirring system for the solvent recovery phase; tubing and valves for various connections; pressure gauge, thermometer and level indicator; and a safety automatism that disconnects the heating system when the pressure in the vessel exceeds the preset depression.
Los disolventes idóneos para aplicación del procedimiento, además de un alto poder de disolución, deben de cumplir requisitos relativos a seguridad y medio ambiente, tales como: ininflamabilidad, nula corrosividad, baja toxicidad, biodegradabilidad, etc.The solvents suitable for the application of the procedure, in addition to a high dissolution power, must comply with safety and environmental requirements, such as: non-flammability, zero corrosivity, low toxicity, biodegradability, etc.
DESCRIPCIÓN DE LA FIGURA ADJUNTADESCRIPTION OF THE ATTACHED FIGURE
Para facilitar la explicación se acompaña la presente descripción de la figura 1, en la que se representa, a título de ejemplo ilustrativo y no limitativo, la disposición del equipamiento para la limpieza de un tanque de almacenamiento.To facilitate the explanation, the present description of figure 1 is attached, in which, as an illustrative and non-limiting example, the arrangement of the equipment for cleaning a storage tank is represented.
Los elementos designados con números en la figura corresponden a las partes que se indican a continuación:The elements designated with numbers in the figure correspond to the parts indicated below:
El tanque de almacenamiento -1- es la instalación a limpiar en este caso. En la boca de inspección de la envolvente se instala una tapa -2- con conexiones para la línea de vaporización -3- y líneas con pies de aspiración -4-. La bomba de vacío -5- mantiene en depresión la vasija de calentamiento -6- y descarga al tanque el vapor de disolvente. La depresión inducida por la bomba de vacío se transmite a la unidad filtrante -7- y al colector de líneas de aspiración -8-, forzando así el filtrado y retorno de la disolución a la vasija de vaporización. El sistema de control de emisiones está constituido por una tapa de conexión -9-, una línea de extracción de gases -10-, y una unidad de tratamiento de gases de emisión -11-.The storage tank -1- is the installation to be cleaned in this case. A cover -2- with connections for the vaporization line -3- and lines with suction feet -4- is installed in the enclosure inspection mouth. The vacuum pump -5- keeps the heating vessel -6- in depression and discharges solvent vapor into the tank. The depression induced by the vacuum pump is transmitted to the filter unit -7- and to the suction line collector -8-, thus forcing the filtering and return of the solution to the vaporization vessel. The emission control system consists of a connection cover -9-, a gas extraction line -10-, and an emission gas treatment unit -11-.
MODO PREFERENTE DE REALIZACIÓN DE LA INVENCIÓNPREFERRED MODE OF EMBODIMENT OF THE INVENTION
Un caso representativo de limpieza mediante el procedimiento objeto de esta patente, se presenta en el desengrase de un tanque de almacenamiento de fuelóleo.A representative case of cleaning by the procedure object of this patent is presented in the degreasing of a fuel oil storage tank.
A la vista de la figura 1 y de acuerdo con la descripción del procedimiento, la secuencia operacional es la siguiente:In view of Figure 1 and according to the description of the procedure, the operational sequence is as follows:
Instalación de equipos, conexión de mangueras y ubicación de los pies de las líneas de aspiración en los puntos más favorables del fondo del tanque. Previamente se habrá realizado la extracción del grueso de lodos aceitosos del tanque por métodos convencionales.Equipment installation, hose connection and location of the feet of the suction lines at the most favorable points at the bottom of the tank. Previously, the extraction of the bulk of oily sludge from the tank will have been carried out by conventional methods.
Vaporización del disolvente en la vasija de calentamiento e inyección del vapor de disolvente al tanque. La bomba de vacío mantiene en depresión la vasija de calentamiento y descarga el vapor de disolvente al tanque. Condensación del vapor de disolvente en el interior del tanque y disolución del fuelóleo contaminante. En prevención de emisiones se conecta el sistema de control de emisiones, constituido por una línea de evacuación de aire, para neutralizar sobrepresiones en el tanque, y una unidad de tratamiento de gases de emisión.Vaporization of the solvent in the heating vessel and injection of solvent vapor into the tank. The vacuum pump keeps the heating vessel in depression and discharges solvent vapor into the tank. Condensation of solvent vapor inside the tank and dissolution of the contaminating fuel oil. In emission prevention, the emission control system is connected, consisting of an air evacuation line, to neutralize overpressures in the tank, and an emission gas treatment unit.
Aspiración, filtrado y retorno a la vasija de calentamiento del disolvente y fuelóleo disuelto. La aspiración es forzada por la bomba de vacío y se controla con las válvulas y mirillas del colector de líneas de aspiración. Recuperación "in situ" del disolvente por destilación en vacío. Se cierran las válvulas del colector de líneas de aspiración, se conecta el sistema de agitación y se emplea como condensador la propia instalación en limpieza. Se mantiene la secuencia de operaciones anteriores hasta la completa disolución del fuelóleo contaminante, procediendo a continuación con las operaciones siguientes: Aspiración y filtrado del disolvente remanente en el tanque. Si quedase disolvente retenido en irregularidades del fondo del tanque, personal equipado con traje químico y equipo de protección respiratoria, habría de situar en dichas irregularidades los pies de aspiración. Ventilación final del tanque mediante el extractor de aire y la unidad de tratamiento de gases de emisión. La unidad de tratamiento, generalmente constituida por un condensador y un enfriador frigorífico, podrá ser complementada o sustituida por otro sistema de condensación, absorción o adsorción de gases de emisión. Aspiration, filtration and return to the solvent heating vessel and dissolved fuel oil. The suction is forced by the vacuum pump and is controlled with the valves and sight glasses of the suction line manifold. "In situ" recovery of the solvent by vacuum distillation. The suction line manifold valves are closed, the agitation system is connected and the cleaning facility itself is used as a condenser. The sequence of previous operations is maintained until the complete dissolution of the contaminating fuel oil, then proceeding with the following operations: Aspiration and filtering of the remaining solvent in the tank. If solvent were retained in irregularities of the bottom of the tank, personnel equipped with chemical suit and respiratory protection equipment, the suction feet should be placed in said irregularities. Final ventilation of the tank through the exhaust fan and the emission gas treatment unit. The treatment unit, generally constituted by a condenser and a refrigerator cooler, may be complemented or replaced by another system of condensation, absorption or adsorption of emission gases.

Claims

REIVINDICACIONES
1.- Procedimiento de limpieza de recipientes y circuitos de tubería contaminados por sustancias orgánicas mediante la aplicación de disolventes en fase vapor, caracterizado por comprender las operaciones siguientes:1.- Procedure for cleaning containers and piping circuits contaminated by organic substances through the application of solvents in the vapor phase, characterized by comprising the following operations:
Vaporización del disolvente en una vasija de calentamiento en "depresión";Vaporization of the solvent in a "depression" heating vessel;
Inyección del vapor de disolvente al interior de la instalación y disolución del contaminante;Injection of solvent vapor into the installation and dissolution of the contaminant;
Aspiración, filtrado y retorno de la disolución a la vasija de vaporización;Aspiration, filtration and return of the solution to the vaporization vessel;
Recuperación "in situ" del disolvente contaminado;"In situ" recovery of contaminated solvent;
Control y tratamiento de gases de emisión;Control and treatment of emission gases;
Ventilación de la instalación; Habiéndose previsto en dicho procedimiento la utilización de una bomba de vacío, que realiza las funciones siguientes: mantiene en depresión la vasija de calentamiento; inyecta a la instalación el vapor de disolvente; fuerza la aspiración, filtrado y retorno de la disolución a la vasija de calentamiento; y permite recuperar "in situ" el disolvente contaminado por destilación en vacío. Installation ventilation; The use of a vacuum pump, which performs the following functions, is provided in said procedure: it keeps the heating vessel in depression; solvent vapor is injected into the installation; forces the aspiration, filtering and return of the solution to the heating vessel; and allows to recover "in situ" the contaminated solvent by vacuum distillation.
PCT/ES2003/000107 2002-03-21 2003-03-11 Method of cleaning containers and piping systems which are contaminated with organic substances through the application of vapour-phase solvents WO2003080261A1 (en)

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ESP200200667 2002-03-21
ES200200667A ES2208062B1 (en) 2002-03-21 2002-03-21 CLEANING PROCEDURE OF CONTAINERS AND PIPE CIRCUITS CONTAMINATED BY ORGANIC SUBSTANCES THROUGH THE APPLICATION OF VAPOR PHASE SOLVENTS.

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Publication number Priority date Publication date Assignee Title
CL2010000644A1 (en) 2010-06-18 2011-01-14 Andesocean S A Sterilization equipment used in the loading of containers for the transport of products in an aseptic way, comprising a portable boiler, pre-washing systems using chemicals, circulation water and hot water, a pump for washing, steam for sterilizing and hoses flexible; and washing method.

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4238892A (en) * 1977-10-31 1980-12-16 Horst Geiss Apparatus for cleaning containers
EP0642845A1 (en) * 1993-08-13 1995-03-15 BRANSON ULTRASCHALL Niederlassung der EMERSON TECHNOLOGIES GmbH & CO. An apparatus for cleaning, rinsing and drying workpieces
US5425183A (en) * 1991-12-04 1995-06-20 Vacon Technologies, Inc. Method and apparatus for producing and delivering solvent vapor to vessel interiors for treating residue deposits and coatings
US5531188A (en) * 1993-08-02 1996-07-02 Tomasulo; James Cleaning system for removal of soluble hydrocarbon residue from surfaces

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4238892A (en) * 1977-10-31 1980-12-16 Horst Geiss Apparatus for cleaning containers
US5425183A (en) * 1991-12-04 1995-06-20 Vacon Technologies, Inc. Method and apparatus for producing and delivering solvent vapor to vessel interiors for treating residue deposits and coatings
US5531188A (en) * 1993-08-02 1996-07-02 Tomasulo; James Cleaning system for removal of soluble hydrocarbon residue from surfaces
EP0642845A1 (en) * 1993-08-13 1995-03-15 BRANSON ULTRASCHALL Niederlassung der EMERSON TECHNOLOGIES GmbH & CO. An apparatus for cleaning, rinsing and drying workpieces

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ES2208062B1 (en) 2005-04-01
AU2003214268A1 (en) 2003-10-08

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