DD275729A1

DD275729A1 - METHOD AND DEVICE FOR RINOING HEAT EXCHANGERS, PANELS AND AGGREGATES

Info

Publication number: DD275729A1
Application number: DD32010388A
Authority: DD
Inventors: Willi Hein; Gert Hengstwerth; Friedrich Schuetz
Original assignee: Mab Maschinen Und Apparatebau
Priority date: 1988-09-26
Filing date: 1988-09-26
Publication date: 1990-01-31

Abstract

Die Erfindung betrifft ein Verfahren und eine Vorrichtung zum Spuelen von Waermetauschern, Behaeltern und Aggregaten. Das Ziel der Erfindung besteht darin, die bei der Fertigung der genannten Bauteile auftretenden inneren Verunreinigungen zu entfernen, die Spuelfluessigkeitsverluste zu minimieren, den Spuelzyklus zu programmieren und wechselseitig zu betreiben. Die Erfindungsgemaesse Loesung besteht darin, durch eine geeignete Kombination eines Kaelte- und eines Spuelkreislaufes mittels einer elektrischen Steuerung durch Zeitglieder die Reinigung insbesondere von Waermetauschern zu bewirken. Dabei arbeitet die Kaelteanlage sowohl als Kaeltemaschine als auch als Waermepumpe. Fig. 1The invention relates to a method and a device for flushing heat exchangers, containers and units. The object of the invention is to remove the internal contaminants that occur in the manufacture of said components, minimize spill liquid loss, program and operate the spool cycle. The solution according to the invention consists in effecting the cleaning, in particular of heat exchangers, by a suitable combination of a refrigerant and a spooling cycle by means of an electrical control by means of timers. The Kaelteanlage works both as a cold machine and as a heat pump. Fig. 1

Description

Hierzu 1 Seite ZeichnungFor this 1 page drawing

Field of application of the invention

Die Erfindung eignet sich vorzugsweise zum Einsatz in der Serienfertigung von Wärmetauschern, Behaltern und Aggregaten insbesondere von Kälte· und klimatechnischen Erzeugnissen. Sie kann auch in Reparaturwerkstätten angewendet werden.The invention is preferably suitable for use in mass production of heat exchangers, containers and units, in particular of refrigeration and air conditioning products. It can also be used in repair shops.

Characteristic of the known technique For the cleaning of heat exchangers, the prior art technique identifies a variety of methods and devices that can be used

jedoch vorwiegend mit der Beseitigung von funktionsbedingten Ablagerungen, z. B. Kesselstein, innerhalb des Betriebseinsatzesbefassen.but mainly with the elimination of functional deposits, such. As scale, deal within the operational use.

The known cleaning methods include the following types:

- rotierende· oder gleitende Bürsten- Rotary or sliding brushes

- Spülen mit aggressiven Medien- Rinse with aggressive media

- SpOlOfi mit einer definierten Flüssigkeit unter Zusatz von Feststoff körpern - variierend In ihrer Größe und Stoffzusiunmenteuunff-DE Pat. Nr. 2502 354-SpOlOfi with a defined liquid with the addition of solids - varying in size and substance composition Pat. No. 2502,354

- Spülen mit Flüssigkeit und gleichzeitiger Ultraschallbeaufschlagung- Rinse with liquid and simultaneous Ultraschallbeaufschlagung

- Beaufschlagen des mit Flüssigkeit gefüllten Erzeugnisses mit DruckstöGen - Dh' Pat. Nr. 1501477 - und betroffen eine Vielzahl von Kombinationen vorgenannter Verfahren.- Applying pressure to the liquid-filled product - ie, Pat. No. 1501477 - and affects a variety of combinations of the aforementioned methods.

In vielen Fällen, Insbesondere bei Erzeugnissen der Kältö· und Kllma'.echnik, ist ein Austreiben, ggf. ein Neutralisieren und Trocknen, der Erzeugnisinnenflächen erforderlich. Hohe Verluste an SpüllKuslpkelt und ein relativ hoher Arbeitszeitaufwand ergeben sich daraus.In many cases, especially in the case of refrigeration and cooling technology products, expulsion, if necessary neutralization and drying, of the product inner surfaces is necessary. High losses of SpüllKuslpkelt and a relatively high workload result from it.

Object of the invention

Das Ziel der Erfindung besteht darin, mit Hilfe eines Verfahrens und einer Spüleinrichtung, die bei der Fertigung von Wärmetauschern, Behältern und Aggregaten auftretenden Inneren Verunreinigungen, z.B. Späne, Lötperlen, Flußmittelreste, FmU- und ölreste zu entfernen, dabei die SpOlflücslgkeltsverluste zu minimieren, den Spülzyklus zu programmieren und wechselseitig zu betreiben,The object of the invention is, by means of a method and a flushing device, to remove the internal contaminants occurring in the manufacture of heat exchangers, containers and aggregates, e.g. Removing chips, solder bumps, flux residues, FmU and oil residues, thereby minimizing spillage losses, programming the purge cycle and reciprocating,

Explanation of the essence of the invention

Die erfindungsgemäße Aufgabe besteht darin, durch eine zweckmäßige Kombination eines Kälte- und eines Spülkreislaufs mittels einer elektrischen Steuerung durch Zeitglieder die Reinigung der Wärmetauscher zu bewirken, dabei arbeitet die Kälteanlage sowohl als Kühlmaschine als auch als Wärmepumpe. In Abhängigkeit vom Siedepunkt der Spülflüssigkeit kann die für die Dampferzeugung und zur Destillations erforderliche Energie durch entsprechende Energieträger, wie Elektro-, Gas-, Heißwasser, Dampf usw. realisiert werden.The object of the invention is to effect the cleaning of the heat exchangers by means of an appropriate combination of a refrigeration cycle and a scavenging cycle by means of an electric control by means of timers, while the refrigeration system functions both as a refrigerating machine and as a heat pump. Depending on the boiling point of the rinsing liquid required for steam generation and distillation energy can be realized by appropriate energy sources, such as electric, gas, hot water, steam, etc.

AujlOhrungsbelsplel The invention will be described below using the example of a circuit diagram of a flushing device for Klimuhuhewärmeteuscher

erläutert werden. - Fig. 1 -be explained. - Fig. 1 -

As rinsing liquid R11 (CFCI ₃ ) is used, as this physiologically harmless, non-flammable, easily distilled and

kältekreislauffreundlich ist.refrigeration cycle friendly.

The procedure is as follows: The cooling system is ready for operation. The R-11 reservoir β is filled with rinsing liquid. The cooling system 1,2,3,4,5 is by connecting the Refrigerant scrubber 1 is put into operation and the R 11 abgokühlt. The heat exchangers A and B to be flushed to the Hoses of solenoid valves 19 and 20 connected. After reaching the setpoint temperature, ζ. B. +10 ⁰ C in the R-11 Storage bucket 6, the centrifugal pump 12 by a temperature monitor, not shown, connected. With the help of Bypaßventiles 14, the flow pressure-readable on the pressure gauge 16-regulated. By pressing the start button .A * (not shown), the solenoid valves ti and 19 are opened and the Solenoid valves 20 electrically blocked. The timer controlled rinse cycle is as follows: The centrifugal pump 12 pushes the cooled liquid R11 through the heat exchanger A to be purged the dirt and Magnetic filter 8 and then back into the cooled R-11 reservoir 6. At the same time, a partial flow of R11 fills the tube bundle countercurrent condenser 2 back to the solenoid valve 17. The pressurized R11 is heated by the hot gas flow of the compressor 1 of the refrigeration system. After completion of the

flüssigen Spülens schaltet ein Zeitglied (nicht dargestellt), dabei werden das Magnetventil 18 geschlossen und dasliquid purging switches a timer (not shown), while the solenoid valve 18 are closed and the

Solenoid valve 17 is opened. When closing the solenoid valve 18 is a rapid reduction in pressure to be flushed Heat exchanger A and in the filled with hot R-1! -Flüssigkeit Rohrbündelgegenstromverflüsslger ?., Which zum Falling below the boiling pressure leads and therefore the boiling R11 the cool residual liquid from the to be rinsed Heat exchanger A by means of the R-11 vapor pressure expels. This first intense burst of steam is going through permanently

nachverdampfendes R11, welches mit Hilfe der Kreislaufpumpe 12 durch das Magnetventil 17 und das Drosselventil 21 in dennachverdampfendes R11, which by means of the circulation pump 12 through the solenoid valve 17 and the throttle valve 21 in the

Rohrbündelgegenstromverflüselger 2 is pressed, maintained. The expulsion of the liquid R11 by superheated steam

erfolgt so lange, bis der zu spülende Wärmetauscher A und der Schmutz- und Magnetfilter 8 nahezu dietakes place until the heat exchanger to be flushed A and the dirt and magnetic filter 8 almost the

Have reached condensation temperature of the refrigeration system. Another timer causes the closing of the solenoid valve

in der Zuleitung zum Rohtbündelgegenstromverflüssiger 2; die Restflüssigkeit in demselben verdampft noch und das überhitztehoiße R-11-Gas kann aus dem Rohrbündelwärmetauscher 2 und dem zu spülenden Wärmetauscher A im gekühlten R-11-in the supply line to Rohhem countercurrent condenser 2; the residual liquid in the same still evaporates and the superheated residual R-11 gas can be removed from the shell and tube heat exchanger 2 and the heat exchanger A to be flushed in the cooled R-11 gas.

Condens out liquid reservoir 6. By another timer (not shown), the rinse cycle is terminated,

indem die Magnetventile 19 geschlossen und die Magnetventile 20 entriegelt werden.by closing the solenoid valves 19 and unlocking the solenoid valves 20.

Since there is no technological heat requirement during the elimination phase, the excess Kondensatfonswärme removed by the pressostatically controlled air-cooled condenser 3. Before the flushed heat exchanger A is replaced, the start button, B "(not shown) to operate and thus the Rinsing cycle for the heat exchanger B initiated. Depending on the size of the heat exchangers A and B to be flushed, several can be flushed in parallel. The structure of the flushing device can be clearly seen from the drawing of FIG. 1.

Claims

1. A method for purging heat exchangers, containers and units o. Ä. With a SpülflüSsigkeit, characterized in that the rinsing liquid cooled by a cooling system, the rinsing process takes place and after the rinsing a partial stream of the cooled rinsing liquid is evaporated, with the help of the residual rinse liquid expelled from the rinsed object, this is heated and after exposure of the evaporation of the partial liquid flow, a condensation out of the superheated steam takes place in the cooled reservoir.

2. The method according to claim 1, characterized in that the condensation heat of the cooling system used to evaporate the partial liquid flow and the excess heat of condensation is dissipated by an additional heat exchanger.

3. The method according to claim 1 and 2, characterized in that the heat of evaporation for the evaporation of the partial liquid flow as extraneous heat (hot water, steam, Elt energy, etc.) is supplied.

4. The method according to claim 1 to 3, characterized in that the distillation of the rinsing liquid in the bypass takes place by utilizing the heat of condensation of the cooling system or by external energy.

5. An apparatus for purging heat exchangers, containers and units with a rinsing liquid, characterized in that a refrigeration cycle consisting of a compressor (1), a Rohrbündelgegonstrcmverflüssiger (2), a heat exchanger (3), a refrigerant collector (4) and an evaporator (6) with a rinsing circuit, consisting of a reservoir (6), a liquid pump (12), a Rohrbündelgegenstromverflüssiger (2) to be purged

, Heat exchangers (A and B) and a magnetic and dirt filter (8), thermally coupled by the tube bundle heat exchanger (2) and the detergent reservoir (6).

6. Apparatus according to claim 5, characterized in that the thermal coupling by other sources of energy (such as brine for cooling or steam for heating) can be done.

7. Apparatus according to claim 5 and 6, characterized in that the scavenging cycle runs independently, the timers are variably programmable, the objects to be flushed alternately (A and B) and flushed in parallel operation.