IE61481B1 - Heat exchanger module of fired ceramic material - Google Patents

Abstract

The module is produced from a stack of punched and laminated green ceramic cards and consists of at least two cards (2). The cards have recesses (4) which form tubular channels (5) when the cards (2) are stacked. Rings (3) are arranged between the cards as part of the tubular channels (5). <IMAGE>

Description

The invention relates to a heat exchanger nodule of fired ceramic material which is produced hy firing a stack of punched and laminated green, ceramic cards.

FR-A-2,152g729 has disclosed parallel-flow heat exchangers of stacked metal plates, in which the plate stack has three rows of channels which are each formed by orifices in the plates. Each row is in a circular orientationall three rows are located concentrically. Between the plates there are rings which mutually separate the concentrically arranged rows of orifices.

Heat exchangers of the· typ® referred to are known from DB-A-3,136/253- They are produced from ceramic foils or cards in which the flow channels ar© punched or stamped and which are joined together with the aid of laminating devices. The heat exchanger block obtained in this way is first heated and the organic constituents are burned out at 200 - 30©’C. The block is then fired at 12 00 to 1700C- The disadvantages are the great number of different card patterns 'for the construction of the block, the re finishing work on the green block and the fired block and the restricted possibilities for cleaning the channels. The invention is intended to remedv these. <—» It is intended to make it possible to produce the heat exchanger with a minimum of card patterns and to use it in like manner for particle-laden gas streams and for liguld/gas and liouid/liguid heat exchange.

The object is achieved by a heat exchanger module of the type mentioned, wherein the cards have cut-outs which, in stacked cards, fora through-channels, and rings surrounding the channels are positioned between the cards, slit-shaped channels being formed which extend perpendicular to and surround the through-channels.

The advantages achieved by the invention lie essentially in the fact that th© module can 'be constructed frc® one 3card pattern. If necessary the sealing of the fired module can he improved by a second firing and introduction of sealing agents, for example silicon or a glaze, via the tubular channels inside the module intended for the warm medium. The heat exchanger module Is especially suitable for constructing heat exchanger systems. In this case it is advantageous If the modules are placed on top of one another to form columns. In this configuration the hot medium is passed in straight lines through the column-shaped construction. Alternatively, the modules can be sealed to one another by glueing with organic or inorganic glues, mortars, glazes and the like. However, normal sealing elements such as fiber cord, fiber paper, 0-rings, C-seals, etc. are also suitable. The sealing surfaces can be structured or ground. Aay number of columns can be installed in a heat exchanger housing. In this case, It is sufficient to brace the individual columns against a fixed support with spring elements to compensate for thermal expansions. Rigid connection of the columns to one another is not required. However, they can be positioned by guide elements pushed into the guide grooves of the module. The guide elements can be shaped so that at the transition from one column to the next the cold medium is always passed into the Inside of th® module. Through the configuration of th® heat exchanger housing th® mode of operation of the heat exchanger can be changed free, fer exampl®, cross to cross-counter current without changing the column design.

The Invention, is described. In detail below with the aid of drawings showing just ©ne embodiment la whichs Fig. 1 shows a plan view of the heat exchanger module; Fig. 2 shows the section II-II from Fig. 1 Fig. 3 shows a heat exchanger system constructed from heat exchanger modules as shewn In Fig. 2, and specifically shows the section III-III from Fig. 4, and Fig. 4 shows the section IV-IV fro® Fig. 3.

The heat exehanger module 1 Is composed of ceramic cards 2 and ceramic rings 3. The cards have cut-outs 4 aad It is advantageous if the rings 3 have the same internal contour and fhe same free cross-section as the cut-outs 4. Cards 2 with cut-outs 4 and rings 3 are stacked alternately. In fact so that rings 3 and cut-outs 4 form a tubular channel 5 running in a straight line. Slotshaped channels 6 are formed transversely to the direction of the tubular channels 5 and parallel to the card plane. The height of the channels 6 can be varied as required by stacking several rings 3 ©n top of on© another. The perforations 7 at th© edge of the card can be used to take stacking aids# assembly aids 8, guide elements etc.

In the heat exchanger system as shown in Pigs. 3 and 4 heat exchanger modules 1 are assembled to fora columns 9 which ar© positioned parallel to one another in a housing 12. Th© individual columns 9 are fixed In terms of their positions relative to one another and in relation to th® housing 12 by assembly aids 8 which can also be formed as guide elements. Seals 11 are positioned between the heat exchanger modules 1 of a column 9 to prevent the heat exchanger media from intermixing. The ends of the individual columns 9 are also sealed against the housing 12 by seals 11. To take up the longitudinal expansions of the columns S caused by temperature the columns 9 are positioned on bearing elements 17, 17* which are sealed against the columns 9 with seals 11 aad against the housing 12 with seals 11% 13 aad 14. While the bearing element 17* Is supported directly on the housing 12 by seal 11* the bearing element 17 Is supported oa the housing 12 by springs 10,. 15 Indicates fhe direction of flow of the cold medium and 16 fhe direction of flew of the hot medlua®,,,

Claims (2)

1. a heat exchanger module of fired ceramic material produced from a stack of punched and laminated green ceramic cards, wherein the cards have cut-outs which, in form through-channels, and rings the channels are positioned between the cards, slit-shaped channels being formed which extend perpendicular to and surround the through-channels. Patesnt Claims: stacked cards, surrounding

2. A heat exchanger module according to claim 1, substantially 10 as hereinbefore described with particular reference to and as illustrated in the accompanying drawings»