EP1102956A1 - Method and installation for managing solid elements circulating in a heat exchanger for cleaning the latter - Google Patents
Method and installation for managing solid elements circulating in a heat exchanger for cleaning the latterInfo
- Publication number
- EP1102956A1 EP1102956A1 EP98941555A EP98941555A EP1102956A1 EP 1102956 A1 EP1102956 A1 EP 1102956A1 EP 98941555 A EP98941555 A EP 98941555A EP 98941555 A EP98941555 A EP 98941555A EP 1102956 A1 EP1102956 A1 EP 1102956A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pipe
- heat exchanger
- management
- solid cleaning
- cleaning elements
- 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.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G1/00—Non-rotary, e.g. reciprocated, appliances
- F28G1/12—Fluid-propelled scrapers, bullets, or like solid bodies
Definitions
- the present invention relates generally to heat exchangers, and, for example, tubular heat exchangers forming condensers, the cleaning of which is provided continuously by solid elements, in practice in the form of a ball and produced for example by foam rubber, systematically put into circulation for this purpose in one of the flows concerned.
- the present invention relates more particularly to the management of the solid cleaning elements thus used.
- this management basically involves, on the one hand, to avoid that , with the flow which carries them, the solid cleaning elements in question are evacuated to the sewer, the interposition, on the outlet pipe of the heat exchanger, of means of interception suitable for their retention, and, on the other hand, recycling, towards the inlet pipe of the heat exchanger, of the solid cleaning elements thus retained by these interception means.
- this management device For its proper functioning, this management device needs to be crossed by a given flow of flow. It follows that, to the detriment of costs, this management system must, to date, be systematically adapted to the capacity of the installation treated, being, in particular, duly sized accordingly.
- the present invention generally relates to a provision making it possible to avoid this drawback.
- a method for managing the solid cleaning elements circulated in a heat exchanger for cleaning thereof of the kind according to which, own means of interception when retaining the solid cleaning elements in circulation being interposed on the outlet pipe of this heat exchanger, the solid cleaning elements retained by these interception means are recycled to the inlet pipe thereof; by passing these solid cleaning elements through a management device, this process being generally characterized in that there is interposed, between the interception means and the management device, a concentration device capable of picking up the concentration of the corresponding return flow in solid cleaning elements and in matching the flow conditions at the inlet of the management device to the condi normal operating conditions.
- the present invention also relates to a management installation for solid cleaning elements circulating in a heat exchanger for cleaning the latter, of the type comprising interception means which, suitable for retaining the solid cleaning elements in circulation, are interposed on the outlet pipe of the heat exchanger, a return pipe, which recycles towards the inlet pipe of the heat exchanger a return flow containing the solid cleaning elements retained by the means of interception, and, disposed on this return line, a device for managing these solid cleaning elements, characterized in that, between the interception means and the management device, is interposed, on the return line, a concentration device dividing the corresponding return flow into two parts, namely, a first part, or main part, which normally contains all of the s solid cleaning elements, and which is directed towards the management device, and a second part, or derived part, which is normally devoid of any solid cleaning element, and which is separated from the management device, the return pipe belonging to circulation means which are suitable for locally generating, through interception means, a counter-current circulation.
- the management device is spared part of the flow rate of the return flow concerned, while normally seeing all of the solid cleaning elements to be managed pass through.
- the concentration device according to the invention advantageously makes it possible to systematically recreate, at the input of the management device, determined flow conditions, which correspond to its normal operating conditions.
- a standard management device can advantageously be implemented, for the benefit of costs.
- the concentrating device according to the invention advantageously makes it possible to consequently reduce the power of the pump normally necessary to ensure against the current circulation of the corresponding return flow.
- FIG. 1 is a block diagram of a management installation according to invention
- Figure 2 is, on a larger scale, a longitudinal sectional view of the concentration device used in this management installation
- Figure 3 is another view in longitudinal section of this concentrating device, along the line III-III of Figure 2.
- FIG. 1 is shown schematically, under the general reference 10, a heat exchanger, and, for example , a heat exchanger forming condenser, which, as shown schematically by the arrows F1, is crossed by a flow of cooling fluid, in this case water, thanks, on the one hand, to an inlet pipe 1 1 E , and, on the other hand, an II S outlet pipe.
- a heat exchanger and, for example , a heat exchanger forming condenser, which, as shown schematically by the arrows F1
- a flow of cooling fluid in this case water, thanks, on the one hand, to an inlet pipe 1 1 E , and, on the other hand, an II S outlet pipe.
- tubular heat exchanger which, for example, is of the type succinctly described in French patent No 94 02109 mentioned above.
- filtration means 12 are interposed on the inlet pipe 1 1 E, by means of a sleeve 13.
- solid cleaning elements 15 are capable of being placed in permanent circulation in the heat exchanger 10, for the continuous cleaning of the latter.
- these are foam rubber balls, the diameter of which is slightly greater than that of the tubes of the heat exchanger 10, and the density of which, in the impregnated state, is similar to that of water.
- these solid cleaning elements 1 5 are systematically injected into the inlet pipe 1 1 E, downstream of the filtration means 12, in order to be entrained by the incoming flow.
- these interception means 17 will not be described in detail here.
- a wheel 20 which, transversely closing the cuff 16, has, radially, between its axis and its periphery, a filtering panel 21, and which, under the control control means not shown, is rotatably mounted about its axis, and, on the other hand, two horns 22A, 22R, which, each arranged respectively on either side of the wheel 20, one downstream in the direction of the outgoing flow through the outlet pipe 11 S, the other upstream, are established in correspondence with one another, and are both turned towards the filter panel 21 of the wheel 20 .
- the management installation 18 comprises circulation means 24, which are capable of generating, locally, through the interception means 17, in line with the horns 22A, 22R, circulation against -current, and which themselves comprise, to do this, on the one hand, an inlet pipe 25A, established between the inlet pipe 11 E of the heat exchanger 10 and its outlet pipe 11 S , this inlet pipe 25A connecting more precisely to the horn 22A disposed downstream of the interception means 17, and, on the other hand, a return pipe 25R, which, itself, connected to the horn 22R located at upstream of the interception means 17, recycles towards the inlet pipe 1 1 E of the heat exchanger 10 a return flow containing the solid cleaning elements 15 retained by these interception means 17, and on which is disposed a device 26 for managing these solid cleaning elements 15, in view e, in particular, a check on the number of these, the elimination of those whose dimensions are no longer sufficient, and a replenishment of new solid cleaning elements.
- circulation means 24 are capable of generating, locally, through the interception means 17,
- This management device 26 does not fall under the present invention, it will not be described here. According to the invention, there is interposed, between the interception means 17 and the management device 26, a concentrating device 27 capable of recording the concentration of the corresponding return flow in solid cleaning elements 15.
- a concentration device 27 dividing the corresponding return flow in two parts, namely, as shown schematically by the arrows P1, P2 in FIG. 1, a part P1, or main part, which normally contains all the solid cleaning elements 15 in circulation, and which is directed towards the management device 26 , and a second part P2, or derived part, which is normally devoid of any solid cleaning element 15, and which is removed from this management device 26.
- the main part P1 corresponds to a minority of the processed return flow, and the derived part P2 to a majority of it.
- the main part P1 is at relatively low speed, and the derived part P2 at relatively high speed.
- the management installation 18 includes a recycling line 28 which directs the derived part P2 of the return flow to the outlet pipe 11 S of the heat exchanger 10. More precisely, in this form of implementation, this recycling pipe 28 is connected to the inlet pipe 25A.
- the circulation means 24 comprising a pump 30 on this inlet pipe 25A
- the recycling pipe 28 is connected to this inlet pipe 25A upstream of this pump 30.
- valves 34, 35 are provided on the inlet pipe 25A, one upstream of the pump 30, the other downstream of the latter, for possible isolation of this pump 30, and, jointly , this inlet pipe 25A is locally doubled by a bypass pipe 37, for switching off the pump 30 if desired.
- this bypass pipe 37 there is a non-return valve 38.
- the return pipe 25R is controlled, in the embodiment shown, by a valve 39, which operates downstream of the management device 26.
- the return pipe 25R serves, in the sleeve 13, nozzles 40, which provide the injection, into the incoming flow, of the solid cleaning elements 15 to be put back into circulation or to be circulated therein, and which, preferably, are oriented against the current.
- a discharge pipe In the embodiment shown, a discharge pipe
- an evacuation pipe 44 connected to the outlet pipe 1 1 S of the heat exchanger 10, for evacuation of the debris retained by these filtration means 12.
- the concentration device 27 is, preferably, and as shown, a filter comprising at least one grid 46 at the downstream end of which intervenes, as shown diagrammatically in FIGS. 2 and 3, a vortex chamber 47.
- the concentrating device 27 comprises, in a V, two grids 46, which converge with one another in the direction of the vortex chamber 47.
- These grids 46 are for example made up of bars 48 whose spacing is less than the diameter of the solid cleaning elements 15. Preferably, the grids 46 are fixed.
- a washing line 49 is then provided, which, controlled by a valve
- the solid cleaning elements 15 continuously pass through the heat exchanger 10, and, retained by the interception means 17 at the exit from the latter, they are recycled at its entry after, successively, their passage in the concentration device 27, which separates them from the greater part of the corresponding flow, and their passage through the management device 26, which ensures the processing thereof.
- the concentration device 27 the flow conditions at the inlet of the management device 26 are well determined, and they correspond to the normal operating conditions of this management device 26. If desired, the discharge pipe 42 allows the removal of solid cleaning elements 15.
Abstract
Description
Claims
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/FR1998/001756 WO2000008404A1 (en) | 1998-08-06 | 1998-08-06 | Method and installation for managing solid elements circulating in a heat exchanger for cleaning the latter |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1102956A1 true EP1102956A1 (en) | 2001-05-30 |
EP1102956B1 EP1102956B1 (en) | 2002-11-13 |
Family
ID=9522945
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98941555A Expired - Lifetime EP1102956B1 (en) | 1998-08-06 | 1998-08-06 | Method and installation for managing solid elements circulating in a heat exchanger for cleaning the latter |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1102956B1 (en) |
JP (1) | JP4090199B2 (en) |
DE (1) | DE19883011B4 (en) |
WO (1) | WO2000008404A1 (en) |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1795348A (en) | 1927-03-30 | 1931-03-10 | Westinghouse Electric & Mfg Co | Condenser-cleaning system |
FR2468868A1 (en) * | 1979-11-06 | 1981-05-08 | Taprogge Reinigungsanlagen | Power-station condenser cleaning equipment - has hydro-cyclonic strainer-separator to keep cleaning balls from fibrous material |
KR860000855B1 (en) * | 1980-06-30 | 1986-07-09 | 가부시기가이샤 히다찌 세이사꾸쇼 | Cleaning apparatus for heat exchange tube |
FR2495028A1 (en) * | 1980-12-01 | 1982-06-04 | Alsthom Atlantique | CLEANING ELEMENT AND CLEANING INSTALLATION USING THE SAME |
FR2609644B1 (en) | 1987-01-16 | 1991-01-04 | Beaudrey & Cie | SELF-CLEANING FILTER TO INSERT ON A PRESSURE PIPE |
FR2634672B1 (en) * | 1988-07-27 | 1990-11-09 | Technos Cie | IMPROVEMENTS ON DEVICES FOR REMOVING WASTE BALLS FROM TUBULAR BEAM CLEANING PLANTS |
DE4029196A1 (en) * | 1990-09-14 | 1992-03-19 | Taprogge Gmbh | METHOD FOR MEASURING THE CLEANING EFFECTIVENESS OF SPONGE RUBBER BALLS IN HEAT EXCHANGERS, AND METHOD AND SYSTEM FOR INDIRECTLY MEASURING THE HEAT TRANSFER ON CONDENSER TUBES |
US5450895A (en) * | 1993-11-18 | 1995-09-19 | C.Q.M. Ltd. | Apparatus for separating balls from fluid, particularly for systems using the balls for cleaning fluid-conducting tubing |
FR2716530B1 (en) * | 1994-02-24 | 1996-07-12 | Beaudrey & Cie | Interception device for solid elements circulating in a heat exchanger for cleaning the latter. |
FR2766915B1 (en) * | 1997-07-31 | 1999-10-08 | Beaudrey & Cie | METHOD FOR THE MANAGEMENT OF SOLID ELEMENTS CIRCULATED IN A HEAT EXCHANGER FOR CLEANING THE SAME, AND CORRESPONDING INSTALLATION |
-
1998
- 1998-08-06 JP JP2000563995A patent/JP4090199B2/en not_active Expired - Fee Related
- 1998-08-06 WO PCT/FR1998/001756 patent/WO2000008404A1/en active IP Right Grant
- 1998-08-06 EP EP98941555A patent/EP1102956B1/en not_active Expired - Lifetime
- 1998-08-06 DE DE19883011T patent/DE19883011B4/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO0008404A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE19883011B4 (en) | 2008-11-27 |
DE19883011T1 (en) | 2001-07-12 |
EP1102956B1 (en) | 2002-11-13 |
WO2000008404A1 (en) | 2000-02-17 |
JP4090199B2 (en) | 2008-05-28 |
JP2002522740A (en) | 2002-07-23 |
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