DE4447991B4 - Regenerative air dryer for high air flow - Google Patents

Abstract

The invention relates to a regenerable air dryer for a large air flow, consisting of a plurality of filters which are interconnected and which are arranged on a rotatable plate. To create an air dryer of this kind, with which it is possible to filter out large amounts of air in a given time unit of moisture to be determined humidity, a regenerable air moisture filter is proposed, the only with two humidity sensors and five holes between a rotatable filter portion, the standing floor and the lid, which are each required for the operation of the moisture filtering and heating for regeneration, works.

Description

The The invention relates to a regenerable air dryer for a huge Air flow, consisting of four filters mounted on a rotatable Plate are arranged.

The air dryer is based on a humidity filter, as it is from the DE 40 00 297 A1 It is known where more or less dormant liquids are removed at low air movements from tank systems. This humidity filter is designed for compressors of air and conditionally closed containers, thus for large volumes of air. In this case, the air humidity filter is installed in front of the intake air inlet of Compres sors for compressors, conditionally closed containers in the general airspace. The air humidity for compressors should be reduced to a minimum. On the other hand, a certain humidity may be desirable for conditionally closed containers, but does not exclude complete removal of the humidity. For non-regenerable filters, large volumes of air require large humidity filters to avoid saturation too quickly. Regenerable humidity filters, however, are relatively smaller, so the air flow, the heating and cooling in the right proportion with each other. But this has the disadvantage of many valves that need to be switched, as well as many meters.

From the DE 20 25 205 C3 is already a method for adsorbing water vapor from gases, preferably air, in chambers filled with an adsorbent known, of which in each case at least one chamber is traversed by the gas to be dried and at least one other chamber of heated air for regeneration (regeneration air) of which at least a part is recirculated back into this chamber in the circulation, wherein the regeneration air is returned only after a portion of the regeneration cycle of a chamber back into this chamber and / or in the temporal following, to be regenerated chamber, and at least a part of is heated in the circulation recirculated regeneration air before re-entering the regeneration chamber (s).

It Object of the invention, an air dryer of the aforementioned To create a way of making it possible is, big Air quantities in a certain time unit of humidity to be determined Filter out moisture.

to solution This object is achieved by an air dryer with the features specified in claim 1 proposed.

• a) dass sich die Filter nach oben hin konisch verjüngen, so dass die Luftgeschwindigkeit unten im Filter gering, oben hingegen stärker ist, dass das Öffnen und Schließen der Verbindungsleitungen mittels eines Drehschiebers durchführbar ist und dass die Filter um 90 Grad in den einzelnen Filtersektionen schaltbar sind, wobei der A-Filter als Arbeitsfilter, der B-Filter als Regenerationsfilter, der C-Filter als Abkühlungsfilter und der D-Filter als Bereitschaftsfilter ausgebildet sind,
• b) dass die Filter mit Silikagel oder anderem Filtermaterial gefüllt ist, so dass die von unten einströmende Luft im Nachobensteigen das Wasser oder Feuchtigkeit aufnehmen kann,
• c) dass alle Filter oben eine Bohrung aufweisen, die in der A-Sektion zum Luftausgang (zu den Verbrauchern) und in der B-Sektion zum Luftausgang (für die aufgeheizte Luft) offen ist und in der C- und D-Sektion von einem Deckel verschlossen ist, wobei im Luftausgang der A-Sektion ein Bypass angeordnet ist,
• d) dass die Luftgeschwindigkeit in der Sektion A durch den Verbraucher und der Größe des Filters bestimmbar ist, dass genug Luft durch den Bypass geht, wobei ein kleiner Überdruck für den Bypass und ein kleiner Unterdruck in dem Luftausgang entsteht, so dass die Luft durch den Bypass in die feststehende Bodenpklatte zur Verteilung in der Sektion B gelangt, was durch das Ansaugen der Luft durch den Verbraucher, die konische Formgebung des Filters und durch die Größe des Bypasses regulierbar ist,
• e) dass der Boden in der Sektion B Vorrichtungen zur Vereilung der Luft und eine Heizung zum Trocknen des Silikagels oder des anderen Filtermaterials aufweist, und dass der Boden der Sektion B aus Material von geringer Wärmeleitfähigkeit ist, so dass die Heizplatte, die über der Verteilung angeordnet ist, das Filter aufheizt, so dass das Silikagel austrockenbar ist,
• f) dass die Feuchte aus dem Luftstrom austritt und durch den Luftausgang der Sektion B in die freie Luft eintritt,
• g) dass im Bypass ein Feuchtefühler angeordnet ist wobei die Luftfeuchtigkeit an dieser Messstelle erst auftritt, bevor sie zum höher liegenden Luftausgang gelangt, so dass die Sättigung der Luftfeuchte im Silikagel schichtweise von unten nach oben erfolgen kann, und dass bei Erreichen der zu bestimmenden Luftfeuchte der Wechsel der Filter vollziehbar ist und dass ein zweiter Feuchtefühler vorgesehen ist, der im Luftausgang angeordnet ist und der die Heizung abschaltet, sobald der eingestellt Wert erreicht worden ist, und
• h) dass der Boden nur in der Sektion A eine Luftzufuhr hat und alle Filter unten offen sind, und
• i) dass ein Zuluftventil in der aus einem bedingt geschlossenen Behälter abgeführten Luftzufuhrleitung enthalten ist.

It is intended

• a) that taper the filter conically upwards, so that the air velocity at the bottom of the filter is low, above, however, stronger, that the opening and closing of the connecting lines by means of a rotary valve is feasible and that the filter switchable by 90 degrees in the individual filter sections where the A filter is designed as a working filter, the B filter as a regeneration filter, the C filter as a cooling filter and the D filter as a standby filter,
• b) that the filter is filled with silica gel or other filter material, so that the incoming air from below can absorb the water or moisture in the ascending,
• c) that all filters at the top have a bore which is open in the A-section to the air outlet (to the consumers) and in the B-section to the air outlet (for the heated air) and in the C and D-sections of one Cover is closed, wherein in the air outlet of the A-section a bypass is arranged,
• d) that the air velocity in the section A can be determined by the consumer and the size of the filter, that enough air passes through the bypass, creating a small overpressure for the bypass and a small negative pressure in the air outlet, so that the air through the Bypass into the fixed bottom plate for distribution in Section B passes, which is adjustable by the intake of air by the consumer, the conical shape of the filter and by the size of the bypass,
• e) that the floor in the section B has devices for air dying and a heater for drying the silica gel or the other filter material, and that the bottom of the section B is of low heat conductivity material, so that the heating plate is above the distribution is arranged, the filter heats up, so that the silica gel is dry,
• f) that the moisture escapes from the air stream and enters the open air through the air outlet of section B,
• g) that a humidity sensor is arranged in the bypass, whereby the humidity at this measuring point only occurs before it reaches the higher air outlet, so that the saturation of the humidity in the silica gel can be carried out layer by layer from bottom to top, and that upon reaching the humidity to be determined the change of the filter is executable and that a second humidity sensor is provided, which is arranged in the air outlet and which shuts off the heater when the set value has been reached, and
• h) that the floor only has an air supply in section A and all filters are open at the bottom, and
• i) that a supply air valve is included in the discharged from a conditionally closed container air supply line.

It is intended that in the bypass air Humidity measurement is feasible, the humidity at this point only occurs before it reaches the higher-lying air outlet, so that the saturation of the humidity in the silica gel layer by layer from bottom to top can take place.

• – Es ist vorgesehen dass vier gleiche Filter im Kreis auf einer drehbaren Platte stehen, die um 90 Grad jeweils zum Arbeitsgang in den einzelnen Filtersektionen A-Arbeitsfilter, B-Regeneration, C-Abkkühlung und D-Bereitschaft geschaltet werden.
• – In der Sektion A wird die von unten einströmende Luft von dem Silikagel oder anderen Filtermaterial nach oben steigend das Wasser oder die Feuchtigkeit aufgenommen, wobei die Filter nach oben hin konisch sich verjüngen, so dass die Luftgeschwindigkeit unten im Filter gering, oben hingegen stärker wird.
• – Im oberen Dom ist bei allen Filtern eine Bohrung im so vorgesehen, dass die Bohrung in der Sektion A zu dem Bypass und in der B-Sektion zum Luftausgang (für die aufgeizte Luft) offen ist und die weiteren Bohrungen der Filter C und D vom Mittelteil verschlossen sind.
• – Die Luftfeuchtemessung im Bypass erfolgt dadurch, dass Luftfeuchte an dieser Stelle erst auftritt, bevor sie zum höher liegenden Luftausgang kommt, denn die Sättigung der Luftfeuchte im Silikagel erfolgt schichtweise von unten nach oben.
• – Die Luftgeschwindigkeit in der Sektion A wird bestimmt durch den Verbraucher und die Größe des Filters; sie sollen aufeinander abgestimmt sein. Die Besonderheit des Filters liegt aber in der Gekennzeichnung dadurch, dass genug Luft durch den Bypass geht, dass ein kleiner Überdruck für den Bypasss auftritt, ein kleiner Unterdruck in dem Luftausgang entsteht, so dass Luft durch den Bypass in die feststehende Bodenplatte zur Verteilung in der Sektion B gelangt .Dies geschieht durch das Ansaugen der Luft des Verbrauchers, die konische Formgebung und die Größe des Bypasses.
• – Der Boden in der Sektion B ist entsprechend ausgebildet für die Verteilung der Luft, der Heizung, die Silikagel trocknet und dem Material des Bodens der Sektion B. Der Boden, gekühlt durch die Luft der Verteilung, uss nicht in der Sektion B mit den anderen Sektionen im Material übereinstimmen, er soll in jedem Fall in der Sektion B mit einem Material von geringer Wärmeleitfähigkeit gebaut werden, so dass die Heizplatte, die über der Verteilung liegt, das Filter aufheizt, das Silikagel austrocknet.
• – Erwärmte Luft steigt nach oben, wobei die Feuchte aus dem Luftstrom austritt und durch den Luftausgang der Sektion B in die freie Luft eintritt.
• – Der Feuchtefühler im Bypass bewirkt, dass bei Erreichen der zu bestimmenden Luftfeuchte der Wechsel der Filter zustandekommt. Der zweite Feuchtefühler im Luftausgang B ist für das Ende der Heizung vorgesehen, wenn eingestellte Werte erreicht werden.
• – Die Sektion C ist so ausgebildet, dass aufgeheizte Luft und Silikagel abgekühlt werden. Es kann zusätzlich eine Verteilung im Boden vorgesehen werden, die kleiner als in der Sektion B ist, sowie das Anbringen eines Luftausgangs C. Hierzu nachgeschaltet wird die Sektion D zwecks Bereitstellung im Gesamtfilter gestellt, die keinen Luftzu- und ausgang hat.
• – Beschriebenes Gesamtfilter ist so ausgebildet, dass der Boden nur in der Sektion A eine Luftzufuhr hat, alle Filter unten offen sind, und nur über die drehbare Platte in der Sektion A atmosphärische Luft hineingelangen kann, dass in der Sektion B, evtl. C, trockene Luft hineinströmen kann, die aus dem Bypass von der Sektion A kommt, dass nur die Bohrung oben in der Sektion A zum Verbraucher führt, sowie getrocknete Filtermaterial ihre Luftfeuchte durch den Luftaus gang 19 abgeben kann. Die Luftwege werden somit praktisch durch Schieberverschlüsse reguliert, der drehbaren Platte zum Boden und zum Deckel.

The air dryer has the following structure or operates as follows:

• It is envisaged that four equal filters are placed in a circle on a rotatable plate, which are switched by 90 degrees respectively to the operation in the individual filter sections A-working filter, B-regeneration, C-cooling and D-standby.
• - In section A, the incoming air from the bottom of the silica gel or other filter material rising water or moisture is absorbed, the filter tapered conically upwards, so that the air velocity at the bottom of the filter is low, above, however, stronger ,
• - In the upper dome, a hole in all filters is provided in such a way that the hole in the section A to the bypass and in the B-section to the air outlet (for the picked air) is open and the further holes of the filter C and D of Middle part are closed.
• - The humidity in the bypass is measured by the fact that humidity only occurs at this point before it comes to the higher air outlet, because the saturation of the humidity in the silica gel is layer by layer from bottom to top.
• - The air velocity in Section A is determined by the consumer and the size of the filter; they should be coordinated. The peculiarity of the filter lies in the fact that there is enough air through the bypass, that a small overpressure for the bypass occurs, a small negative pressure in the air outlet is created, so that air through the bypass into the fixed base plate for distribution in the This is done by sucking in the air of the consumer, the conical shape and the size of the bypass.
• - The floor in Section B is designed to distribute the air, the heater which dries silica gel and the material of the floor of Section B. The floor, cooled by the air of the distribution, is not in Section B with the others In any case, it should be built in Section B with a material of low thermal conductivity, so that the heating plate, which is above the distribution heats the filter, the silica gel dries out.
• - Heated air rises, the moisture escapes from the airflow and enters through the air outlet of Section B in the open air.
• - The humidity sensor in the bypass causes the filter to change when the humidity to be determined is reached. The second humidity sensor in the air outlet B is intended for the end of the heating when set values are reached.
• - The section C is designed so that heated air and silica gel are cooled. In addition, a distribution can be provided in the bottom, which is smaller than in the section B, and the attachment of an air outlet C. For this purpose, the section D is provided for the purpose of provision in the overall filter, which has no air inlet and outlet.
• - Described overall filter is designed so that the ground only in the section A has an air supply, all filters are open at the bottom, and only on the rotatable plate in the section A can get atmospheric air that in section B, possibly C, dry air can flow in, which comes from the bypass of the section A, that only the hole in the top section A leads to the consumer, and dried filter material their humidity through the aisle transition 19 can deliver. The airways are thus practically regulated by gate valves, the rotatable plate to the bottom and the lid.

In 1 to 5 an embodiment is shown, wherein the air dryer in 1 in a view according to line II in 3 is shown. The air dryer has four filters in each of the filter sections A, B, C and D surrounding the bypass 3 stand. They are filled with silica gel and stand on a rotatable plate 4 when reaching a certain humidity, measured with the air moisture meter 12A one step is rotated by 90 degrees. The lower part of the entire filter is the fixed floor 5 , with a large bore for the air supply 6 to filter section A.

Between the 4 filters is an insulation 11 for damping the heat generated in B compared to the filters A and C ( 3 ). Furthermore, the filters are on the rotatable plate 4 in the lower part open, there is a certain small space to a sieve, so that the silica gel is not between the rotatable plate 4 and the fixed ground 5 device.

Up in the air dryer is a lid 15 with an air outlet 10 for section A to the consumers. In section B is another hole for the air outlet 19 so that the heated air can escape. This lid 15 is fixed. The humidity meter 12A is in the bypass ( 3 ) appropriate. The other air moisture meter 12B is in the air outlet 19 to install, because the humidity occurs earlier and the heating 18 is turned on. The fixed ground 5 in which the bypass 3 goes in the center, should with the distribution 17 supply the air from the bypass, only dry air, for the wet silica gel of section B, as well as the rotating plate 4 with the filters 1 finish flush. In addition, in Section B the fixed ground is 5 a heater 18 to install, which up to approx.

150 degrees C, the filter B heats up to dry out the silica gel. The heating system 18 must therefore be above the distribution 17 lie, thus cool air flow in the distribution 17 the fixed ground 5 keeps relatively cool. It still requires an air flow in the conical dome 7 the air speed is determined so that the cooling is guaranteed. It should also be noted that the fixed floor, which need not be made of one piece, can also be thermally insulated in section B.

Reciprocating compressors have the disadvantage of absorbing the intake air in bursts. This leads to a certain frequency of the intake air in the air outlet 10 and the filter material in section A. To attenuate this frequency in the intake air, a damper is required 20 so that the filter material is not smashed ( 2 ).

One important principle of this filter is also the slider-like control through the interaction of holes in the solid parts, the open and be closed, and the moving parts, the rotatable Plate with the filters as well as the heater immovable in the Section B remains. It should be mentioned that all Holes and surfaces Of course plan and closing are.

Conditionally closed containers 22 are containers that are more or less airtight, such as containers, refrigerators, whose doors are opened and closed, rooms before manufacturing etc. All should have a certain humidity for convenient storage or manufacturing.

In 1 is a humidity filter shown, the humidity in certain ranges of 5-50% relative humidity in the container, regulates. From the drawing 1 it can be seen that the bypass 3 in the air outlet 10 arranged so that a slight overpressure in the bypass 3 opposite the line to the fan is created, so that no air from the section B can get into the section A.

The dry air is through a fan 21 in conditionally closed container 22 until the humidifier 23 desired humidity and the fan 21 off. So that in the whole system of total moisture filter and the conditionally closed container no negative pressure to the existing atmospheric air is created, because a portion of the dried air is needed for drying in the filter B, is a supply air valve 24 between the container 22 and the air supply 6 attached, which works like a breathing valve and thus guarantees atmospheric balance. In 1 a filter is shown, where the bypass 3 only begins at the air outlet of the filter A and the air leads to the ground. This leads to a later reaction of the humidifier 12A , Furthermore, in the Ausführungsgemäß 1 a supply air valve 24 attached, in which between the conditionally closed containers and the total filter to compensate for atmospheric air is created and no air enters backwards through the section B in the circuit.

1

filter A, B, C, D

3

bypass

4

rotatable plate

5

fixed ground

6

air supply

7

conical cathedral

9

drilling above

10

air output Section A

11

insulation

12A

Psychrometers

12B

Psychrometers

15

cover

16

floor heating Section B

17

distribution Section B

18

heater Section B

19

air output Section B

20

Damper for the compressor

21

Compressor / fan

22

conditioned closed container

23

Psychrometers in conditionally closed container

24

Air supply

Claims (2)

Regenerative air dryer for a large air flow, consisting of four filters mounted on a rotatable plate ( 4 ), characterized in that a) the filters ( 1 taper conically upwards so that the air velocity at the bottom of the filter ( 1 ) low, but above is stronger and that the filters are switchable by 90 degrees in the individual filter sections, with an A-filter as a working filter, a B-filter as a regeneration filter, a C-filter as a cooling filter and a D-filter as a standby filter b) that the filters ( 1 ) is filled with silica gel or other filter material, c) that all filters ( 1 ) above a hole ( 9 ), which in the A-section to the air outlet ( 10 ) (to the consumers) and in the B-section to the air outlet ( 19 ) (for the heated air) is open and in the C and D section of a lid ( 15 ) is closed, wherein in the air outlet ( 10 ) bypasses the A section ( 3 d) that the air velocity in section A is determined by the consumer and the size of the filter ( 1 ), e) that the soil in section B 17 ) for distributing the air and heating ( 18 ) for drying the silica gel or the other filter material, and that the bottom of the section B is formed of material of low thermal conductivity, f) that for the outlet of the moisture from the air flow, an air outlet ( 19 ) of section B into the open air, g) that in the bypass ( 3 ) a humidity sensor ( 12A ) is arranged, through which upon reaching the predetermined humidity of the change of the filter is executable, and that a second humidity sensor ( 12B ) is provided in the air outlet 19 is arranged and the heating ( 18 ) switches off as soon as a set value has been reached, h) that the soil only in section A an air supply ( 6 ) and all filters are open at the bottom, and i) that a supply air valve ( 24 ) in the conditionally closed container ( 22 ) discharged air supply line ( 6 ) is included. Air dryer according to claim 1, characterized that in the section C a distribution in the ground is provided, the smaller than in section B and that an air outlet C is provided is, by which the heated air and the silica gel are cooled, in addition Section D, which has no air inlet and outlet for provision in the Total filter of section C is nachschaltbar.