DE1401657A1 - Plate heat exchanger for high pressure - Google Patents

Description

BADISGHS AIiILIlJ- & SODA-FABRIK AG

21 JUN11968

B 65 381 Ia / 17 Γ Ludwigshafen / Rhein, den

December 29, 1961 5) i / Wl

O.Z. 21 641

12 te. 1966 Ti / MUB

Plate heat exchanger for high pressure

The invention relates to a plate heat exchanger for transferring heat between two under high pressure Liquids, whereby the liquid pressure serves to seal the individual plates against each other Contact pressure to generate. This plate heat exchanger consists from a cylindrical pressure vessel with removable lids at the two ends, between those executed in the same way and chamber-forming plates, mutually sealed with gaskets at the edge, are arranged and compressed, wherein the cover for the passage of the flowing liquids each with holes and the plates with these holes Through bores are provided with axes running parallel to the container axis.

Such plate heat exchangers are in the art in numerous Cases with good success in heat transfer between Liquids used. Especially where the (temperature difference the liquid flows are low, have a

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BATH

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As a result of their large heat-exchanging surface and the small amount of built-up space compared to conventional heat exchangers, ζ .3 · Solohen with pipes * special advantages · Due to the flat Plates »from which they are composed, however, has hitherto been the use of plate heat exchangers at low pressures limited. A pressure of 20 atm was generally not exceeded

Heat exchangers made of graphite are known, in which cylindrical ring-shaped heat exchange elements in a cylindrical dumbbell are arranged, which have radial bores as well as bores running parallel to the container neck for guiding the product flows »The disadvantage here is the impossibility! to swap the two product streams, since the metal jacket must have different Korroa Ions properties than the graphite elements and when the products are changed, e.g. when using the transmitter for other substances »the one previously flowing in graphite Liquid comes into contact with the metal of the wall. In addition, the simultaneous secure sealing of the chambers and of the ropes of the Hanteis against each other as well as against the cover easily result in interference and ineffective at high pressures «a *

In another known Wäriaotaue rather for hot water suction are tightly on top of each other spiral channels in one Large number of superimposed ring surfaces arranged · That too heating water runs in a spiral shape ron inside out, the hot water emitting the heat radially from the outside to the inside. This heat exchanger is likely to leak at high pressures ^

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if not the two liquid flows within the Mix the container. A method for preventing infection of the heat exchange chambers is also known a heat exchanger, e.g. for cooling milk »in which the The plates are pressed together in a package and placed under vacuum from the outside. The use of this apparatus at under Liquid cellosis under high pressure is therefore impossible.

The need to apply pressure to the individual plates To achieve pressure screws stuck in the plate pack or acting from the outside »requires a large amount of equipment.

The invention is based on the object of developing a simply constructed plate heat exchanger which can be used at high pressures, s.B. Over 1000 at ti, works safely.

This object is achieved in that in the Pressure vessel, which is expanded cylindrically in its upper part and is provided with holes in the jacket, a freely movable Licher, both on the lower narrower part and on the upper enlarged part of the shell of the pressure vessel to the plant The floating lid comes with the corresponding holes Bores for carrying out the product streams is arranged.

TTm a »secure guidance and sealing of the floating lid an © rr Lohen, this is in a further training of the Er- £

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Finding formed like a pot and through against the inner wall O-sealed.

Said high pressures can most easily be "grounded" by a round pressure vessel, the plates are also round educated. This has the advantage that tie rods, with which the rectangular panels were previously pressed together from the outside, around the individual panels against each other and after to seal the outside, can be omitted in the heat exchanger according to the invention.

In order to be able to keep the contact pressure of the plate pack automatically at a given value, the plate heat exchanger according to the invention is equipped with a floating cover

For this purpose, the upper part of the pressure vessel is enlarged. The lower part of the floating lid corresponds to the smaller inner diameter, and its upper part to the larger reduce the inner diameter of the pressure vessel «through the holes in the enlarged part of the jacket at the point where he rages on the smaller one on the larger inner

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O.Z. 21 641

mesaer passes, it is achieved · that the tree can relax into the open atmosphere between the Kreieringflachen at the extensions of the jacket or the deodorant so the deodorant exerts a pressure on the plate pack that corresponds to the difference between the areas on both sides of the Heo floating deodorant and the operating pressure.

It is advisable to use the floating deodorant to allow higher operating pressure of the two fluids to act. Through the holes in the floating deodorant then at the same time the plate pack is placed under the effect of the higher operating pressure from the outside · The seals and supports of the plate pack are therefore only stressed by the respective differential pressure that arises between the exterior and interior of the plate pack.

As a conclusion of the Druokbehält era, a fixed Verachlußdeokel is attached above the swinging Deokels, in The swel has bores similar to those in the lower Deokel. Between the floating lid and the upper lid is slidably placed a connecting pipe · The pipe is attached to the floating deokel and becomes sealed in the top cover by an O-ring seal.

809805/0601

BAD OR

Badische Anilin- & Soda-Fabrik AG

A ΑΛ <| C. C H Telephone: (0621) 601 (operator)

, I ¹ TUI «JO / Telex: 464811 (headquarters)

P 1 401 657.0 Telegrams: BASF Ludwigshafenrhein

■ "" "——————— Bank details: Landeszentralbank

0.2 21 641 Ludwlgshafe'n am Rhein, current account 51/82

F / MB

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The one in the spaces between the plates and the one surrounding the plates The pressure that sets in outside is lower than with the usual plate coolers without a pressure jacket. It is therefore possible to make the plates even thinner than usual and thus achieve higher heat transfer coefficients * u.

Another advantage of the plate assembly according to the invention is the elimination of tie rods, since the plate assembly is pressed against the floating cover by its own operating pressure. The level of the contact pressure can be modified to a large extent according to the difference between the upper and lower surface of the floating cover.

An embodiment of the invention is shown in the drawing and is described in more detail below. The plate heat exchanger consists of a jacket 1 with two fixed covers 4 and 5; In the covers there are holes 8 to 11 for the passage of the products provided.

To Dm keep the contact pressure of the plate package automatically on a front given value, the plate-• invention is iienwärmetauseher equipped with a floating lid.

809805/0601 '- 6 -

BATH ORIGINAL

\ ufslchtsratavoraltzendtr: Carl Wuriter · Board of Directors: Bernhard Timm, Chairman; Hans Frelensahnar, stable v. Chairman) Willi Danz; Wolfgang HaMzalari Next Ludewig; Rolf Magerten Klaus Schönfeld; Adolf Stalnhofen Deputy: Erich Hankai; Hans Moall · Seat of the Geaallachaft: Ludwigshafen am Rhein

O.Z. 21 641

In the heat exchanger, individual plates 6 are one above the other a plate pack 7 pressed together and sealed with seals 14 against the outer space 13. The covers 4 and 5 are by threaded rings 17 and 18 with the jacket, into which these are screwed connected. To seal the interior of the Pressure vessel are arranged between the covers 4 and 5 and the jacket 1 O-rings 19 and 20, respectively.

The jacket 1 is expanded in its upper part. This will it is divided into a narrower part 21 and a further part 22. Between these two parts 21 and 22 there is a circular shoulder 23. A detached floating lid 24 is arranged in the container. He comes both on the closer Part 21 as on the further part 22 of the jacket 1 to the plant and therefore has, like the jacket, a narrower section 2'5 and a further section 26 with corresponding cylindrical outer surfaces. Between the two cylindrical outer surfaces of the sections 25 and 26 there is also a circular ring-shaped shoulder 27. The floating cover 24 is at its two sections sealed with O-rings 28 and 29 against the cylindrical surfaces of the parts 21 and 22 of the wall. He has to pass the flowing products two bores 30 and 31. To compensate for the pressures prevailing on both sides of the floating lid In the further part 22 of the jacket, a bore 32 is arranged directly above the shoulder 23. It is required to attend a Movement of the floating lid 24 balances with the outside air to enable.

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On the floating cover 24 acts from above a force that the cross-sectional area running perpendicular to the axis in the enlarged Part 22 corresponds. The force acting on it from below is smaller and corresponds to the smaller cross-sectional area of the narrower part 21. The resulting force, i.e. the Difference between the two forces, therefore acts on the plate pack 7 as a pressure. This resulting force is therefore also of the Pressure over the floating lid depends. The plate pack is pressed tightly together by the pressure of the floating cover. In this way, high pressures can occur in the products flowing in the plate pack 7 without the individual Plates are stressed too much.

To between the bore 9 in the upper cover 5 and the associated Bore 31 in the floating cover 24 is a tight but movable Establish connection, a pipe 33 is firmly connected to the bore 31. It extends to the hole 9 in the upper Cover 5 and is sealed here with an O-ring 34. Of the floating lid 24 can therefore move together with the tube 33 move with respect to the upper cover 5 without the two products entering and exiting through the bores 8 and 9, mix together. Between the holes 8 and 30 is omitted a connecting pipe, since the pressure in the product serves as contact pressure for the floating lid and this pressure through the bore 36 is also to be passed on into the space 13.

The arrangement according to the drawing is used when the as a seal plastic rings inserted between the lids strength + -

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O.Z. 21 641

moderately still allow this. If the temperature is too high for this, however, a version with a metallic seal is used chosen. It is then the permissible pressure or the operating temperature solely on the thickness and the material of the jacket and depends on the temperature resistance of the seals between the plates. As a result of the pressure equalization between the interior 6 and the space 13 around the plate pack, the highest pressures can be absorbed.

309805/0601

Claims (1)

B 65 381 la / 17 f O.Z. 21 641 Supplement III Patentana prttche 1. Plate heat exchanger for high pressure, consisting of a cylindrical pressure vessel with removable Deokeln at the two ends, between which similarly executed and ac edge mutually sealed, chambers-forming plates are arranged and pressed together, the cover for the passage of the flowing liquids each with wells and the plates with these bores corresponding through holes with Terlaufenden are parallel to the container axis Aohsen ester Away, characterized in that in the pressure vessel (35 t) of an upper part (22) extends cylindrically in "and counter with bores (32) in the weight ( 1) pass: .et> a freely movable floating cover (24) with the holes ( 9,10) corresponding bores (30,31) for carrying out the product streams is arranged. 80 9805/060 1 BATH original B 65 381 Ia / 17 f
OZ 21 641 2. Plate heat exchanger according to claim 1 , characterized in that the floating cover (24) is designed like a pot and is sealed against the inner wall by O-rings (28, 29). BADISCHE ANILIN- & SODA-FABRIK AG twofold 809805/0601