DE2615674A1 - HEAT EXCHANGER DEVICE - Google Patents

Description

Patent attorneys Dipl.-Ing. K. Weickmann, Dipl.-Phys. Dr. K. Fincke

Dipl.-Ing. RAAVeickmann, Dipl.-Chem. B. Huber

XI

8 MUNICH 86, DEN

PO Box 860 820

MÖHLSTRASSE 22, CALL NUMBER 98 39 21/22

William J. Darm

5815 S.W. Tucker Avenue

Beaverton, Oregon, V. St. v. A.

Heat exchanger device

The present invention relates generally to a fluid heat exchange device useful for heat exchange suitable between fluid streams; the invention relates in particular to vertical counterflow heat exchangers, which can be used as air-to-air or air-to-water heat exchangers. The present heat exchange device is particularly useful for cooling hot exhaust gas or hot exhaust air by means of cold water for the purpose of energy conservation and for the purpose of condensing air pollutants and cooling hot water with cold water Ambient air or for cooling hot ambient air by means of cold water for air conditioning purposes.

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The heat exchanger according to the present invention is of the countercurrent type; it has first and second rows of Passages on which are separated from each other by heat exchanger plates. Such a heat exchanger becomes like this worn so that the passages are almost vertical. The heat exchanger in question is used as an air-to-water heat exchanger When used, water is sprayed onto the surfaces of the upper ends of the series of passages, whichever then flows down the length of the passages in question, while air flows into the lower ends of the other row is discharged from passages, which then along their length on opposite sides of the heat exchanger plates flows. This results in an extremely efficient heat exchange process through the separating the two rows of passages Exchanger plates.

It is known to spray water into a series of passages of an air-to-air heat exchanger, such as that shown in US Pat U.S. Patents 1,409,520 and 2,825,210 are indicated. The heat exchanger described in the first-mentioned US patent is arranged horizontally and the water is sprayed into the outlet end of the one series of air passages so that it does not flow down the length of the passages concerned. In the heat exchanger disclosed in the second mentioned US patent the heat exchanger plates are supported by rubber spacers that separate the two different rows separate from passages so that no noticeable direct lateral heat transfer through the thickness of the separators in done in the same way as the countercurrent heat exchanger takes place according to the invention.

The present air-water heat exchanger device has the advantage that the outlet temperature the cooled air or the heated water can be easily controlled by adjusting the water flow or the

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Air flow is adjusted by means of a valve or by means of a throttle, which or which by a Temperature sensor can be operated automatically. Another advantage is that the device in question is reversible and also for cooling hot water and for heating of cold air can be used without any modifications in the heat exchanger. In addition, the high latent heat of the steam or humid exhaust air can be recovered by transferring it to clean water that through other passages in the heat exchanger for heating buildings or for other purposes.

Finally, it can create hydrocarbon vapors and other air pollutants from the warm or hot exhaust air by condensing such impurities within the passages the heat exchanger must be eliminated. If the condensed impurities remain in a liquid state, they run down the vertical passages and exit the heat exchange device through a drain. But when such condensed contaminants tend to build up as a deposit on the surfaces of the passageways solidify, then they can be solidified by injecting solvents or cleaning agents into the through such passageways air flowing through it can be removed. In addition, this can remove solid airborne contaminants eliminated that water or a more viscous liquid such as oil is deposited on the surface of the passageways to collect impinging particles and to remove them from the bulk liquid.

Countercurrent heat exchangers as described in U.S. Patent 3,381 include a series of heat exchanger plates which are arranged within a housing and which have a plurality of channels or passages determine which run side by side along the length of the housing. These passages are included

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constructed so that a fluid in every other one of the channels exchanges heat with the fluid flowing in the remaining channels. Conveniently, the heat exchanger plates delimiting such channels should have large surface areas that are exposed to the fluid which passes through the heat exchanger. In this regard, it has been found that substantial width thin metal sheets, preferably corrugated to increase the turbulence of fluids passing through the heat exchanger, are used in the manufacture of a highly satisfactory heat exchanger for many types of applications can be. In addition, the heat exchanger according to the present invention differs from the known heat exchangers and the non-countercurrent heat exchanger according to US Pat. No. 3,371,709 by its simple and economical split end construction. Accordingly, the ends of the heat exchanger plates are divided into two end parts which are connected to different exchanger plates on their opposite sides to form the two rows of passages. This results in a more efficient heat exchanger capable of handling extremely high air flow rates, on the order of hundreds or thousands of cubic feet per minute.

In the manufacture of such a heat exchanger are in consideration of the flexible property of the plates or Sheets which form the exchanger plates, and in view of the large number of plates that usually make up one make up a typical heat exchanger, there are certain problems in assembling the unit with a view to: that the plates are permanently properly positioned within the exchanger, and with a view to the fact that the completed unit the desired strength and

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Has stability. It should also be taken into account that any process that is used in the manufacture of the heat exchanger is applied, should be such a method, which in turn can be carried out without the Requirement for the use of highly qualified personnel is associated with it. Also, the procedure in question should to be carried out in a quick and usable manner. These problems are overcome by the present invention.

The invention is generally based on the object of providing a new and improved countercurrent heat exchanger create, which is characterized by simple and efficient operation and which has two rows of passages, which are separated from each other by heat exchanger plates, which allows heat transfer across their Effect thickness. The new heat exchanger to be created should also have a simple and economical structure distinguish and have heat exchanger plates, the ends of which are divided into two end parts with different Exchanger plates connected on opposite sides to form the first and second rows of passages are. In addition, in the new heat exchanger to be created, the two rows of passages are to be supported in this way be that they are largely vertical. It also aims to get water to the surfaces of a series of passageways next to their upper ends to allow the water to flow down while air enters the lower ends Ends of the other rows of passages are to be discharged in such a way that there is an upward flow in these passages is caused to provide a high efficiency air-to-water heat exchanger capable of is to exchange the heat in considerable amounts of air and water at a high speed.

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Furthermore, a heat exchanger device is to be created, in which the temperature of the air or water can be precisely regulated by adjusting the amount of heating or cooling fluid which is supplied by the subject Heat exchanger flows. The processes in question should be reversible to the air or the water warm up or cool down. Finally, the newly created heat exchanger is intended to condense water or impurities from the air on the surfaces of the heat exchange passages and for the removal of the condensed water or the impurities can be used in a simple and effective manner.

The object indicated above is achieved by the invention specified in claim 1.

The invention is explained in more detail below using preferred exemplary embodiments with the aid of drawings. Fig. 1 shows a schematic view of an air-water heat exchanger device according to an embodiment of the present invention, wherein individual parts of the heat exchanger housing have been omitted for clarity. 2 shows part of the arrangement in a perspective view of the heat exchanger plates and associated water spraying devices included in the heat exchanger device according to FIG. 1 are provided.

FIG. 3 shows a horizontal sectional view along the line in FIG registered line 3-3.

Fig. 4 shows in a perspective view an air-to-air heat exchanger device according to another embodiment of the invention.

FIG. 5 shows a vertical sectional view along the line in FIG registered line 5-5.

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In Fig. 1 a preferred embodiment of the heat exchanger device according to the present invention is shown. This heat exchange device is an air-water heat exchange device. It comprises a countercurrent heat exchanger 1. The heat exchanger in question has a housing which contains an arrangement of heat exchanger plates as shown in FIG. These heat exchanger plates form a first row and a second row of fluid passages which are separated from one another by exchanger plates in a manner to be described in more detail below. The heat exchanger 1 is supported so that the passages are almost vertical between the upper end and the lower end. The lower ends of a series of passageways are connected to an air inlet tube 2, which air discharges into such an inlet from any source forth comes the selling of a hot moist air source, the air has a temperature of, for example 82 ⁰ C (corresponding to 180 ⁰ F) possesses in a wet state and in the dry state of 60 ⁰ C (corresponding to 14O ° C). The upper ends of such a series of passages are attached to an air discharge duct or an air discharge pipe 3 which discharges the air to the atmosphere after the air in question has cooled in the heat exchanger 1 as it passes through the series of passages in the direction of the Arrows 4 flows upwards. Most of the moisture in the air condenses on the surfaces of the passageways and drains downwardly from the heat exchanger device through a drain. As a result, it is found that the air discharged at the outlet 3 has also lower humidity and a temperature of 15.6 ° C has (corresponding to 60 ⁰ F) in the dry and wet state.

In the other series of passages in the heat exchanger, the upper ends are used as water inlets 5 by

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a water spray device 6 is provided either outside the heat exchanger and above the water inlets or inside the heat exchanger within such inlets. The water is sprayed onto the surfaces of the other series of passages in question by the sprayers 6 provided adjacent to their upper ends. The water in question flows down in the direction of the arrows along the surfaces provided by one side of the heat exchanger plates. When hot exhaust air is cooled, cold water having a temperature of, for example 4.4 ⁰ C (corresponding to 40 ° F) is dispensed through the spraying device 6 to the heat exchanger, and hot water with a temperature of eg 60 ° C (corresponding to 14O ° F ) is drained into the water outlet pipe 8 which is connected to the lower ends of the other series of passages. As can be seen from Fig. 1, the heat exchanger 1 is carried or supported in a vertical position; it can extend through a hole in the roof 9 of a housing which contains the source of the hot exhaust air.

The heat exchanger plate assembly 10 within the heat exchanger is shown in Figure 2; it contains a plurality of heat exchanger plates 12, 14, 16, 18 and 20. The respective Plates are arranged largely parallel in the arrangement. Each of the panels in question has a length which largely coincides with the length of the heat exchanger in which the arrangement in question is to be built in. The plates can also be provided with corrugations or corrugations which are transverse to the plates in question get lost. This removes any fluid, liquid, or gas that may pass through the exchanger in question moved, given a degree of turbulence.

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Each of the plates terminates at each of its ends in a section 2 which runs along the plate in question. The sections run parallel to the longitudinal edges 26 and the plate; usually they are about halfway between the longitudinal edges, whereby the end of the respective plate into a pair of end parts or tongue segments of equal width is divided, as illustrated by the tongue segments 12a and 12b.

The tongue segments of each exchanger plate end are shown as being curved in reverse directions. Accordingly, as shown in Figure 2, the tongue segment 12a is bent so that it is curved outward (where it abuts the housing of the heat exchanger which is mounted around the core member). The tongue segment 12b below the segment 12a is bent so that it is curved inward. With regard to the exchanger plate 14 it should be noted that its upper tongue segment 14a is bent inward, while its lower tongue segment i4b is bent outward in order to abut the tongue segment 12b. Where adjacent ends of the tongue segments abut, they may be secured together of a lying above them elbow, as the angle piece 24 using _5. The elbow 24 in question is secured in its position, as by flanging.

It should be noted that in the case that the upper tongue segment 12a of the plate 12 is bent outward and that the lower segment 12b is bent inwards, at the opposite end of the heat exchanger plate the upper one Tongue segment 12c is bent inward, while the lower segment is bent outward. The same relationship also applies for the tongue segments at each row of ends of a heat exchanger plate to. A divider element designated 30,

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which includes a horizontal expansion wall 32 and a vertical edge flange 34 can be inserted into cutouts which form the tongue segments on the respective row of ends of the heat exchanger plates. The divider serves, when in the position shown in FIG. 2, to separate the end portions of the channels connected to opposite sides of the various panels are set. With regard to the channel 40 in FIG. 2, it should be noted that that thus the divider separates this channel at the point where it between the tongue segments 18a, I6ä of parts of the Channels 38 and 40 is limited below the divider or where there is a limitation between the tongue segments 20b, 18b or 16b, 14b is present.

¥ ie shown in Fig. 2 is a series of passages or channels 36, 40 and 44 at the end of the array, namely at the Bottom according to FIG. 2, open towards the end of the arrangement above the divider. At the opposite end of the array these channels are open to the end of the assembly below the divider. The reverse is true for the other row of passages or channels 38, 42 and 46 to that on the underside of FIG. 2 at the end of the relevant arrangement are shown. These channels are open to the end of the assembly below the divider and at the opposite end At the end of the arrangement they are open towards the end of the arrangement above the divider.

Given the arrangement and assuming the presence of a housing encompassing this, should be seen be that the one series of channels are used for the passage of a fluid material through the exchanger and that an alternating row is used for the passage of another fluid material through the exchanger can be, such fluid materials that

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flow through a multiplicity of flow paths / interspersed with one another

When manufacturing a heat exchanger with a core element of the type described and taking into account the fact that a much larger number of exchanger plates are typically used than in FIG. 2 actually is shown, it should be understood that there is a problem with the correct positioning of the adjacent Exchanger plates in the cases shows that these plates extend in wide spaces between the plate ends. The plates are usually made of thin metal. If the panels are corrugated across their lengths, point they have considerable flexibility in a transverse direction. They are also slightly twisted. It should be evident that the efficiency of the heat exchanger is compromised when the plates are in the finished heat exchanger are not properly aligned, in which a largely uniform distance between the concerned Plates are present where they extend along their length.

According to the invention are thus the various exchanger plates largely arranged in the manner shown in FIG. During assembly and for connection purposes of the various exchanger plates with one another are connecting or fastening clamps 48, which through Metal strips can be formed, which can be attached to the edges of the panels, with the panels in question joined together in that they are fixedly attached to the edges of the panels in question in areas that are longitudinal the arrangement are provided at a distance. The clamps are on each of the opposite rows of adjacent ones Edges attached in the panel assembly. The fastening

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clamp 48, as specifically shown, has slotted indentation points, the slits being the edge portions of the Pick up plates that can be twisted a little after they have been passed through the slots to the relevant Hold the clamps in the appropriate position. The exchanger plates are also at their ends to one another fastened by uniting the tongue segments with the angle pieces 24.

As the next step in the manufacture of the exchanger a series of adjacent longitudinal edges 26 or 28 in the exchanger plate assembly 10 is permanently fixed by the respective edges are embedded in a resin plate 49 or be included. In the course of the production of such a plate, reinforcement material, such as a glass fiber layer, deposited along the interior of a portion of the metal housing 50 of the heat exchanger. About these Layer then becomes a mass of uncured, curable synthetic resin material 49, such as a poured liquid epoxy resin, which is a thermosetting resin that forms a hard mass hardens. The resin impregnates the reinforcement layer and the resin and layer form a curable one Layer on the inner surface of the housing area. The housing area, which can consist of a sheet of metal, represents a mold that delimits the resin layer during this manufacturing stage.

The arrangement of the exchanger plates can then be in the housing section a series of edges 26 or 28 of the panels as well as any interconnecting these edges Fastening strips 48 are pressed down to make up the consisting of the resin and the reinforcing material Layer 49 to sink in, so to speak. After a period of time

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Upon curing of the resin mass, a strong, stable plate 49 made of a plastic results, which forms the longitudinal edges the heat exchanger plates with the housing 50 connects. Such a plate seals the plate edges and provides a Isolation along one side of the heat exchanger. In addition, the plate in question made of the plastic and the reinforcement material a stable component along one side of the panel assembly.

This process can then be repeated by adding in one another housing section or area another layer is made of a resin and a reinforcing material similar to the layer described. The arrangement of the Heat exchanger plates can then be turned over. The edges of the belonging to the opposite row of edges Plates sink into this material layer together with the fastening strips. After curing is therefore a Another stable plate is made which encloses the edges belonging to the opposite row of edges and which forms a stable plate unit with a plurality of exchanger plates.

An article made in the above manner exhibits this Core element made up of assembled exchanger plates, the exchanger plates of which are hardened plates of reinforced resin, which panels comprise the edges belonging to opposite rows of edges of the panels connect and seal. The panels in question made of resin-shaped Material and parts of the sides of the exchanger plate assembly are surrounded by housing sections, which are interconnected to form a complete housing.

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As shown in FIGS. 2 and 3, the spray device 6 a plurality of paired spray tubes 51 disposed in each of the water passages 38, 42 and 46

the
are provided and / extend across their width next to their upper ends. The spray tubes 51 spray water onto the surfaces of such, their upper ends of adjacent passages through spray orifices 52 provided along such tubes at a distance. The water then flows down along such passages in the direction of the arrows 7, since the passages in question are supported in a vertical position. The spray tubes 51 can have an inside diameter of about 6.35 mm (corresponding to 1/4 inch); they are connected to larger supply pipes 53 which now have an inside diameter of 25.4 mm (corresponding to 1 inch) and which in turn are connected to a main conduit pipe 54 with an inside diameter of 101.6 mm (corresponding to 4 inches). The main line pipe 54 is connected to a water dispensing device 56 via a valve 58. The water discharge device can be connected to the outlet side of a water cooling tower, the inlet side of which is connected to the water outlet pipe 8 of the heat exchanger in order to reuse the water after it has been cooled. The valve 58 can be adjusted automatically or manually to change the flow of water through the heat exchanger and thereby regulate the temperature of the air discharged through the pipe 3 from such a heat exchanger.

The heat exchanger device according to FIG. 1 can also be provided with a discharge pipe 60, which with a sump 61 at the bottom of the air inlet pipe 2 is connected to any condensed water or to remove any condensed contaminants, such as carbonaceous vapors, that form from the exhaust air

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of liquids on the surfaces of the heat exchanger passages condense through which the exhaust air flows. Accordingly, some of the air pollutants can be chemical solvents that run down the heat exchanger plates after condensation in the heat exchanger and recovered through drain 60. To the surface to clean the heat exchanger plates and to remove solids deposited on such plates a cleaning liquid source 62 via a valve 64 to the air outlet pipe 3 at the upper end of the air passages of the Heat exchanger connected. Accordingly, a cleaning liquid is periodically injected into the pipe 3; the person in question Liquid flows down the surfaces of the air passages for cleaning purposes. Alternatively, can the cleaning fluid evaporates or vaporizes in hot air and introduced into the inlet pipe 2 so that the cleaning liquid in question on the surfaces the first row of heat exchanger passages condenses when the air flows upwards in the direction of arrows 4. the condensed cleaning liquid flows down the surfaces of the first passages and removes any Solids deposited on such surfaces. The condensed cleaning liquid is in the container or basin 61 and passed through the drain 60 to a suitable evaporation device (not shown), to be evaporated again in the hot air stream. In this way there is a continuously running one Cleaning process.

In Fig. 4 and 5 is another embodiment of the vertical Countercurrent heat exchanger apparatus according to the invention is shown. This heat exchange device includes a plurality of heat exchanger units 1 which are similar to the unit previously described in connection with Figs.

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The heat exchanger units 1 are supported in two rows so that the passages within such heat exchangers run almost vertically. As can be seen from FIG. 5, cool ambient air flows through in the direction of the arrows 4 the one series of passages upwards, and hot or warm exhaust air flows in the direction of the arrows 7 through the another row of passes down. The two rows of passages are apart through the heat exchanger plates separated as shown in FIG.

In the preferred embodiment, the heat exchange device 4 and 5 used to remove contaminants from hot polluted exhaust air, as they were vori a Wood veneer drying device is discharged to cool and condense. The cold ambient air cools the hot exhaust air when it flows up through the heat exchanger; the surrounding air in question causes carbonaceous Vapors and other gaseous contaminants contained in the exhaust air on the surfaces condense the heat exchange passages. The condensed Contaminants appear as liquids on the surfaces of the heat exchanger plates are deposited in such a way that, due to the force of gravity, they descend the heat exchanger plates flow into an exhaust air manifold 66 which runs horizontally along the undersides of the heat exchanger units. The exhaust air is from the lower end of the heat exchanger in the direction of arrows 7 through the pipe 66 by means of an exhaust fan 68 to a suction-delivery device 70 which is connected to an exhaust duct (not shown) that is open to the atmosphere. As a result of the suction of the exhaust fan, a weak negative pressure becomes generated in the pipe 66 and in the exhaust air passages of the heat exchanger units 1 as well as in the exhaust air inlet,

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which leads to such a heat exchanger. The bottom of the suction tube 66 is down to a sump inclined towards in which the liquid contaminants are collected for the purpose of periodic disposal.

The contaminated exhaust air is introduced into the apparatus of FIG. 4 through an exhaust inlet pipe 74. In the inlet pipe a filter area 76 is provided to filter out solid particles from the suction air before the relevant Air is fed to a pair of side tubes 78 and 80 which extend horizontally across the top of the two rows run from heat exchanger units. The exhaust air is through the side pipes 78 and 80 in the direction of Arrows 81 and passed down through the heat exchanger units.

Cold, clean ambient air is carried by the atmosphere the inlet openings 82 in the lower ends of the heat exchangers before units 1 passed upwards, and the heated clean air is drawn into a central tube 84 through outlet ports 86 at the upper ends of such heat exchanger units as illustrated in FIG. 5. The middle tube 84 runs horizontally between the two Side pipes 78 and 80 over the tops of the heat exchanger units; it is connected to a vertical pipe 88. The heated clean air is blown through the tubes 84 and 88 in the direction of the arrows 89 by means of a further air blower 90 sucked, which is between the underside of the tube 88 and the serving for the discharge of clean air Dispensing device 92 is connected to the veneer drying system via a suitable pipe arrangement (not shown) or reconnected to a building's heating system. This translates into significant savings in the Heating costs, since about 70% of the heat of the exhaust air passes through

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the heat transfer in the heat exchangers to the clean air is recovered.

A temperature sensor is used to regulate the temperature of the exhaust air discharged from the outlet of the heat exchanger units 94 arranged at the exit point of the exhaust air collecting pipe 66 and electrically with a magnetic relay 96 or a connected to another actuator which controls the opening and closing of a throttle mechanism 98, which is in the Path of clean air is provided as in the vertical tube 88. As a result, the flow of clean air is through the vertical tube and the heat exchanger automatically changed to reflect the extent of cooling of the exhaust air to vary the final temperature of the exhaust air at the outlet point of the heat exchanger on a given Maintain a temperature of e.g. 66 ° C (corresponding to 150 ° F).

This is necessary, among other things, to keep the condensed contaminants in a liquid state, so that they cover the surfaces of the heat exchange passages and flow down tube 66 into sump 72.

Typical temperatures of the exhaust air and clean air before and after the heat exchange are the following: The discharge air temperature is at the inlet point 74 about 171 ⁰ C (corresponding to 340 ° F) and 66 ⁰ C (corresponding to 150 ⁰ F) on the outlet side of the tube 66th the temperature of the clean air is at an ambient temperature value of, for example 21.1 ⁰ C (corresponding to 70 ⁰ F) at the entry points 82 and at about 127 ° C (corresponding to 260 ⁰ F) at the delivery point 92, with consideration to the temperature rise of about 88 ° C (corresponding to 190 ⁰ F) of the heat exchange.

As a result of the temperature gradient of the exhaust air of 171 ⁰ C

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at 66 ° C, almost all carbon-containing vapors and other gaseous pollutants in the exhaust air are removed condenses on the hot exchanger passages and very few contaminants are passed through the Exhaust air discharge device 70 discharged to the atmosphere, so that in many cases no further pollution removal system is required. Between the exit point of the exhaust air collecting pipe 66 and the exhaust air fan 68 is however, a defogger 100 is used. The defogger is of a conventional type; it contains a multitude of baffles that change the direction of the air flow around any liquid or wet particles to remove from condensed water or from condensed contaminants from the exhaust air, i.e. substances which did not settle on the surfaces of the heat exchanger or tube 66. The defog direction also leads to the collecting container 72.

The heat exchanger passages through which the exhaust air is directed downward in the direction of arrow 7 can thereby be cleaned that a cleaning liquid in such passages through the pipeline 54 by means of the spraying devices 51 is sprayed in a manner similar to that shown in connection with FIGS. Instead of spraying water for condensation purposes like In Fig. 1 - the spray device 6 can thus be used to apply a cleaning liquid or steam Purposes of removing condensation solids and other debris from the surface of the exhaust air passages to spray.

It will be apparent that a number of modifications in the details of the embodiment described above may be made

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present invention without departing from the inventive concept can be made. For example, the exhaust gas can flow upwards in the direction of the arrows 4, while the ambient air or cold water in the direction of arrows 7 in FIG. 5 can flow downwards by only the Side tubes 78 and 80 are moved to the lower ends of the heat exchangers and the fluid inlets 82 to the upper ends of such exchangers are provided. In this case, the pipe 84 would discharge the exhaust air, and the liquid dispensing devices similar to devices 60 and 61 of FIG. 1 would be in the lower side tubes and 80 provided to remove the condensed contaminants while the tube 66 would be used to heat Remove ambient air or the heated water.

The invention thus provides a countercurrent heat exchanger created having two rows of heat exchanger passages separated by heat exchanger plates, which are arranged largely parallel within the heat exchanger and carried or supported in such a way that the relevant passages are largely vertical. The heat exchanger can be an air-to-air or an air-to-water heat exchanger to be used; It can be used to remove moisture or contaminants from hot Discharge air through condensation within the exhaust passages to eliminate. If the heat exchanger in question is used as an air-to-water heat exchanger, water will rise the surfaces of the upper ends of a series of passages are sprayed so that the water in question is along the Passages flow down while air is exhausted into the lower ends of the other row of passages, one up cause directed flow. The ends of the heat exchanger plates are divided into two end parts, those with different heat exchanger plates on opposite sides

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Rarely are such Gertrauden "that the two rubbing are formed by passages which allow _t the air and the water in opposite Kiehtungen by this! Passages for the countercurrent heat exchange flow or flow to. let, the relevant heat exchange takes place by direct lateral transition through the thickness of the respective exchange plate. To manufacture the heat exchanger, the exchanger plates are arranged largely parallel and the edges are connected to one another with the aid of clamps which hold the plates in question together as a unitary bundle. A layer consisting of a mixture of a synthetic resin and a Yerstärkungsmaterials "is prepared, and the disk unit bundle _t housed in such a way that a number of the longitudinal edges of the respective plates is in such a layer. When the resin hardens, the layer forms a stable plate _f which extends along such a series of edges and which seals the respective edges to the heat exchanger housing by an airtight seal.

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Claims (24)

Claims f 1. ^ heat exchanger device with a heat transfer from a gas to a liquid, with a countercurrent heat exchanger device comprising a first row and a second row of heat exchanger passages separated by heat exchanger plates in a heat exchange relationship, the first and second passages on opposite sides of the Heat exchanger plates are provided, characterized in that a support device (9) is provided by which the heat exchanger device (1) is supported in such a way that the heat exchanger passages (36, 38, 40, 42, 44, 46) are almost vertically between their upper ends and their lower ends run so that a gas discharge device (2) is provided which discharges a gas into the lower ends of the first heat exchanger passages (36, 40, 44) in such a way that the gas in question flows through these first passages (36, 40, 44) flows above, and that a liquid spray device (6) is provided i st, which sprays a liquid onto the surfaces of the heat exchanger plates (12, 14, 16, 18, 20) in the second heat exchanger passages (38, 42, 46) near their upper ends and causes the liquid in question to pass through the second heat exchanger passages (38 , 42 _t 46) flows down along the surfaces such that the liquid in question and said gas flow in opposite directions along the surfaces on opposite sides of the same part of the heat exchanger plates (12, 14, 16, 20) and one across the thickness of the respective Plates (12, 14, 16, 18, 20) cause existing direct countercurrent heat exchange. 2. Apparatus according to claim 1, characterized in that the liquid spray device (6) in the heat outlet 609843/0899 exchanger (1) is arranged. 3. Device according to claim 2, characterized in that
that the liquid spraying device (6) a plurality
of perforated spray tubes · (51), which over the
upper ends of the second heat exchange passages (38, 42, 46) extend. 4. Apparatus according to claim 1, characterized in that the gas delivery device (2) heated air into the first Heat exchanger passages (36, 40, 44) and that the liquid dispenser (6) cold water in discharges the second heat exchange passages (38, 42, 46). 5. Apparatus according to claim 4, characterized in that the heated air has such a high humidity that at least a part of that is present in the air
Moisture on the surfaces of the first heat exchange passages (36, 40, 44) condenses, and that the condensed water is discharged from the heat exchanger (1) through a discharge device (60) connected to the lower end of the first heat exchange passages (36, 40, 44) is connected. 6. Apparatus according to claim 2, characterized in that the liquid dispensing device (6) is a water spray device contains ,, the outside of the heat exchanger passages (36, 38, 40, 42, 44, 46) above the upper Ends of the second heat exchange passages (38, 42, 46) is arranged. 7. Apparatus according to claim 4, characterized in that the heated air contains contaminants which "6 09843/0899 are sufficiently cooled that they are on the surfaces of the first heat exchanger passages (36,40,44) condense, and that means (60) for removing the condensed contaminants from the heat exchanger (1) are provided. 8. Heat exchanger device with a counterflow heat exchanger device, which comprises a first series and a second series of heat exchange passages which are separated from each other by heat exchanger plates which are in heat exchange relationship with the first and second Heat exchange passages stand, the heat exchanger plates divided with their ends into two end regions are those with different heat exchanger plates on opposite sides forming the first and second heat exchanger passages are connected, in particular according to one of claims 1 to 7, thereby characterized in that a support device (9) is provided by which the heat exchanger (1) is supported in this way is that the heat exchanger passages (36, 38, 40, 42, 44, 46) are almost vertical between upper ends and lower ends extend that a first dispenser (2) is provided which delivers a first fluid to the lower ends of the first heat exchange passages and which causes the first fluid in question to pass upwardly through said first heat exchange passages flow, and that a second delivery device '(6) is provided which delivers a second fluid to the upper ends of the second heat exchange passages and which causes that the second fluid in question is down through said second heat exchange passages along the surfaces flows. 609843/0899 9. Apparatus according to claim 8, characterized in that the first fluid is air and that the second fluid is water is. 10. Apparatus according to claim 9, characterized in that the second dispensing device (6) is a water spray device having a plurality of perforated spray tubes (51) which are arranged in the heat exchanger (1) and extend over the tops of the second heat exchange passages. 11. The device according to claim 9, characterized in that the first delivery device (2) delivers heated air into the first heat exchanger passages and that the second delivery device (6) delivers cold water into the second heat exchanger passages. 12. The device according to claim 11, characterized in that the heated air has such a high humidity that at least a part of that contained in the air Moisture condenses on the surface of the first heat exchanger passages, and that condenses Water from the heat exchanger (1) is discharged through a discharge device (6o), which is connected to the lower end the first heat exchanger passages is connected. 13. The apparatus according to claim 11, characterized in that the heated air contains gaseous pollutants, which are sufficiently cooled by the cold water that they are on the surfaces of the first heat exchanger passages condense as liquid contaminants that make said first heat exchange passages flow down and out of the heat exchanger (1) Eat out. 609843/0899 14. The device according to claim 8, characterized in that the first fluid and the second fluid air flows with different Temperatures are that the one air stream is heated exhaust air containing gaseous pollutants, which by the cooler air stream in such a way is sufficiently cooled that it is on the surface of the concerned a series of passages in the heat exchanger (1) condense as liquid contaminants, and that these liquid contaminants enter a series of heat exchange passages flow down and out of the heat exchanger (1). 15. The apparatus according to claim 14, characterized in that a cleaning device (62) is provided which a Cleaning fluid in the relevant series of heat exchange passages Allowed to be released in such a way that any solids on the surfaces of the concerned deposited in heat exchanger passages. 16. Heat exchanger and condensing device with a A plurality of countercurrent heat exchanger units each having a first series and a second series of passages which are separated from one another by heat exchanger plates which are in heat exchange relationship stand with the first and second passages on opposite sides, in particular according to one of the claims to 15, characterized in that a support device (9) is provided which supports the heat exchanger units (1) / carries at least two rows in such a way that the Heat exchange passages largely vertically between their upper ends and their lower ends extend that two inlet pipes (78, 80) are provided, which over each one of the ends of the respective heat exchanger 609843/0899 units (1) run in a different row that between these two tubes (78, 80) an intermediate tube (84) extends that over the other ends of the two rows of heat exchanger units (1) a discharge pipe (66) runs that a first discharge device (81) is provided, the hot discharge air through the two tubes (78, 80), through the first series of heat exchanger passages in the heat exchanger units (1) and out of the discharge pipe (66) conducts, and that a second dispensing device (88) is provided, which another fluid through the second Heat exchanger passages in the heat exchanger units (1) emits and from in the opposite direction the said intermediate pipe (84) leads out, the other fluid in question being cooler than the discharge air, which is sufficiently cooled by said other fluid that it contains gaseous contaminants condense on the surfaces of the first passages in the form of liquid contaminants, which flow down said first heat exchanger passages and out of the heat exchanger units (1) flow out. 17. Apparatus according to claim 16, characterized in that the liquid contaminants flow into a collecting container (72) after flowing through the dispensing tube (66). 18. Apparatus according to claim 16, characterized in that said other fluid is ambient air, that the first dispenser includes an exhaust fan (68) which is connected to the outlet side of the delivery tube (66) and which is one below the pressure of the surrounding Atmosphere lying negative pressure in the delivery pipe, in the first heat exchanger passages of the heat exchanger 609843/0899 26V5674 units (1) and in the two inlet pipes (78, 80) causes. 19 · Device according to claim 16, characterized in that a temperature sensing device (94) is provided which to determine the outlet temperature of the discharge air in the discharge tube (66) and to generate a corresponding one electrical control signal is used that said other fluid is ambient air and that also a control device (96, 98) is provided, which depends on the flow of ambient air through the heat exchanger Allowed by said control signal to be adjusted in such a way that the outlet temperature is within a certain Temperature range is maintained. 20. The device according to claim 19, characterized in that the control device contains a throttle device (98), which serves to change the amount of air which flows through the intermediate pipe (84). 21. The device according to claim 16, characterized in that a de-fogging arrangement (100) at the outlet of the delivery pipe (66) is connected and removes liquid mist from the discharge air. 22. The apparatus according to claim 16, characterized in that the heat exchanger plates in the heat exchanger units (1) are divided with their ends into two end areas with different heat exchanger plates are connected on opposite sides to form the first and second heat exchanger passages. 609843/0899 23. The device according to claim 8, characterized in that the first fluid is hot air and that further a cleaning device (62) is provided, which evaporates a cleaning liquid in the hot air and the relevant Causing cleaning fluid to condense on the surfaces of the first row of heat exchanger passages in such a way that that the cleaning liquid in question flows down the said first heat exchanger passages and solids discharges deposited on the surfaces of the respective first heat exchange passages. 24. The device according to claim 23, characterized in that the condensed cleaning liquid in the course of a continuous cleaning and is evaporated again in the hot air. 609843/0899