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Publication numberUS3435834 A
Publication typeGrant
Publication dateApr 1, 1969
Filing dateMar 17, 1967
Priority dateApr 25, 1966
Also published asDE1557553A1
Publication numberUS 3435834 A, US 3435834A, US-A-3435834, US3435834 A, US3435834A
InventorsCooper Harry Christopher
Original AssigneeApv Co Ltd
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Arrangements for in-place cleaning
US 3435834 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

April 1, 1969 H. c. COOPER 3,435,834

ARRANGEMENTS FOR IN-PLACE CLEANING Filed March 17, 1967 United States Patent 3,435,834 ARRANGEMENTS FOR IN-PLAC'E CLEANING Harry Christopher Cooper, Crawley, England, asslgnor to The A.P.V. Company Limited, Crawley, England, a British company Filed Mar. 17, 1967, Ser. No. 623,964 Claims priority, application Great Britain, Apr. 25, 1966, 18,031/66 Int. Cl. B0811 3/04 US. Cl. 134-98 2 Claims ABSTRACT OF THE DISCLOSURE A distribution arrangement for an in-place cleaning system comprising main supply lines for cleaning liquids and rinsing water fed by pumps from storage tanks and a suitable water source, and return lines to the tanks, each individual cleaning circuit or part thereof being adapted to be connected between each main supply line and the corresponding return line or drain line by individually operable valves.

This invention relates to the in-place cleaning of plant and equipment, particularl as used in the potable liquid industry.

In the potable liquid industries, where in-place cleaning is employed, it is frequently necessary to clean several pieces of equipment at the same time. In this case it is common practice to provide a number of separate cleaning units, each storage detergent and sterilant (the cleaning solutions) and having a Water supply and a circulating pump. The provision of several units is, however, expensive, and as an alternative a single unit may be used in which the cleaning solution storage tanks are common to a number of circuits. In this case a separate circulating pump is used for each circuit and automatic valves are provided on each cleaning solution storage tank. For example, the circuits to be cleaned could include respectively a road tanker, a storage tank and a pipeline. They could also include other types of process plant, or alternatively all the circuits could include the same type of equipment. In man installations it is, for example, necessary to clean a number of road tankers or storage tanks at the same time.

The cleaning solutions are pumped through the circuits by the respective circulating pumps and the valves admit water, sterilant and detergent selectively to the circuit. In a typical cleaning cycle these valves would be opened and closed in sequence to perform the following programme:

Water rinse Detergent circulation Water rinse Sterilant circulation Water rinse In the lines connecting each piece of process plant back to the cleaning unit valves are used to direct the water rinse to drain and also to return the detergent and sterilant to the appropriate storage tanks for re-use.

In order to recover the maximum quantity of sterilant and detergent in such systems it is necessary to prevent intermixing in the circuits when one solution follows immediately after another. Where a solution is displaced by another, the programme must be arranged so that storage tanks are drained of the first solution before the second enters. Also the pipeline from the cleaning unit to the storage tank must be cleared of the first solution and the tank allowed to drain before the second enters. As an alternative to this method of operation all the lines may be drained of one solution before the next enters, and in this case use is frequently made of compressed air to blow the lines clear of liquid.

These operations are complicated by the normally considerable length of the lines between the cleaning unit and the plant being cleaned, as these lines then contain substantial quantities of solution which take a long time to displace.

A further disadvantage of this arrangement is that the line from the cleaning unit to each circuit carries all the solutions and where, as is usually the case, hot detergent is used, this leads to considerable heat loss as the line is heated and cooled by the successive fluids.

The invention consists in a distribution arrangement for an in-place cleaning system comprising storage tanks for cleaning liquids, a source of rinsing water, pumps for pumping cleaning liquids and water along separate main supply lines, return lines for returning the cleaning liquids to the respective storage tanks, and individual supply and return conduits for a plurality of cleaning circuits connectable by valves to the main supply lines and the return lines respectively.

This arrangement reduces the total length of the cleaning circuits, simplifies the programming and reduces cleaning times. Also each main supply and return line can be arranged specifically for the fluid it carries, for example the hot detergent line can be insulated to conserve heat and the water line may be made of wroughtiron or similar material to reduce cost.

The invention will be further described with reference to the accompanying drawing, which drawing is a flow diagram of a preferred form of the invention.

The drawing illustrates a common distribution arrangement for three cleaning circuits, shown as a road tanker 1, a storage tank 2 and a pipeline 3. Each cleaning circuit includes a supply line 4 and return line 5. Each supply line 4 is selectively connectable by remotely controlled valves 4a, 4b and 4c to a water line 6, a sterilant supply line 7 and a detergent suppl line 8. Each return conduit 5 is connectable selectively by remote controlled valves 5a, 5b, 50 to a drain connection, a sterilant return line 9 and a detergent return line 10.

Sterilant and detergent solutions are stored in tanks 11 and 12 and supplied by pumps 13 and 14 to the lines 7 and 8 respectively. Water from a main supply is pumped by pump 15 to line 6.

Lines 9 and 10 drain into tanks 11 and 12 respectively.

The detergent is normally used hot and the lines 7 and 10 may be insulated to conserve heat.

The valves 4a, 4b, 40, 5a, 5b, 5c are opened and closed in sequence to provide the cleaning programme described previously.

In this system none of the cleaning solution circulating pumps will operate unless a circuit is selected for cleaning. In large installations the pumps used for circulating cleaning solutions may have other pumps connected in series or parallel with them to boost the pressure or flow of solutions when a number of circuits are operating at the same time. Such booster pumps would be brought into operation by automatic control.

Recirculation may be provided "through relief or check valves (not shown) between the lines 7 and 8 and the lines 9 and 10 respectively.

Various modifications may be made within the scope of the invention. Thus, additional or alternative cleaning solutions may be used, such as acids.

I claim:

1. A distribution arrangement for an in-place cleaning system comprising a plurality of circuits, the arrangement comprising storage tanks for cleaning solutions a source of rinsing water, and pumping means for supplying the cleaning solutions and water to the circuits according to a desired programme, the arrangement having the improvements of comprising separate main supply lines for each of the cleaning solutions and the water, individual pumps feeding the respective main supply lines from the storage tanks, return lines for returning the cleaning solutions to the respective storage tanks, a drain connection, individual supply conduits and individual return conduits for each of the plurality of circuits, and valves adapted to connect each of the main supply lines to each of the individual supply conduits and each of the return conduits to each of the return lines and to the drain connection.

2. A distribution arrangement as claimed in claim 1,

4 wherein at least one of the mainsupply lines and the corresponding return line are thermally insulated.

References Cited UNITED STATES PATENTS 2,558,628 6/1951 Redin 134-95 2,718,481 9/1955 Tuthill 13495 XR 3,046,163 7/1962 Kearney et al. 134-99 XR 10 ROBERT L. BLEUTGE, Primary Examiner.

US. Cl. X.R.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2558628 *Mar 14, 1947Jun 26, 1951Eric RedinMilking machine rinser
US2718481 *Dec 12, 1949Sep 20, 1955John B TuthillMethod of washing dishes
US3046163 *Apr 6, 1960Jul 24, 1962Detrex Chem IndMethod and apparatus for interiorly cleaning tanks and the like
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4364799 *May 4, 1979Dec 21, 1982Emile SteigerElectrochemical treatment
US4770196 *Feb 13, 1986Sep 13, 1988Osswald Hannes EChemical cleaning system
US4874021 *Jun 8, 1988Oct 17, 1989Tetra Dev-Co.Aseptic filling unit for packing machines for long-lasting products with fluid behavior
US4895603 *Dec 19, 1988Jan 23, 1990Philip Morris IncorporatedApparatus and method for in-place cleaning and priming of a nozzle assembly
US4915119 *Apr 21, 1986Apr 10, 1990Dober Chemical CorporationCleaning apparatus and method
US5282889 *Apr 7, 1992Feb 1, 1994Dober Chemical CorporationAutomatically controlling dilution and delivery of concentrates from portable system
US5353821 *Oct 22, 1993Oct 11, 1994Dober Chemical CorporationCleaning apparatus and method
US5427126 *Oct 14, 1993Jun 27, 1995Tri-Clover, Inc.Cleaning system for service tanks
US5449009 *Sep 30, 1993Sep 12, 1995Sherwood Medical CompanyFluid disposal system
US5507305 *Jul 25, 1994Apr 16, 1996Franklin; Robert V.For providing a chemical composition useful to treat a piece of equipment
US5595201 *Dec 5, 1994Jan 21, 1997Dober Chemical Co.Apparatus and methods for automatically cleaning multiple pieces of equipment
US5637103 *Mar 17, 1993Jun 10, 1997Kerwin; Michael J.Fluid collection and disposal system
US5707457 *Jan 11, 1996Jan 13, 1998Yates; WilliamApparatus and process for spray rinsing chemically treated articles
US5736098 *May 11, 1995Apr 7, 1998Sherwood Medical CompanyReusable collection unit; automatic cycle removes wastes; body fluids during surgery
US6206963Aug 25, 1998Mar 27, 2001Philip Morris IncorporatedNozzle
US6488675Oct 15, 1999Dec 3, 2002Fred R. RadfordContaminated medical waste disposal system and method
US6502590 *Aug 31, 2000Jan 7, 2003Koninklijke Philips Electronics N.V.Method and apparatus for flushing x-ray tube heat exchanger
US6823879 *Jul 12, 2002Nov 30, 2004Versar, Inc.Apparatus for cleaning pipes
DE19509646A1 *Mar 17, 1995Sep 19, 1996Karl Heinz Simon Gmbh & Co KgElectroplating plant with separate rinsing liq. supply
DE19509646C2 *Mar 17, 1995Jul 30, 1998Karl Heinz Simon Gmbh & Co KgGalvanikanlage
EP0375263A2 *Dec 13, 1989Jun 27, 1990Philip Morris Products Inc.Apparatus and method for in-place cleaning and priming of a nozzle assembly
Classifications
U.S. Classification134/98.1, 134/99.2, 134/169.00R, 134/171, 134/103.1
International ClassificationB08B9/08, B08B3/00, B08B9/02, B08B9/093, B08B9/032
Cooperative ClassificationB08B9/08, B08B9/0933, B08B3/00
European ClassificationB08B9/093B, B08B3/00, B08B9/08