WO2018095880A1 - Déshumidificateur à échange de chaleur et sorption, dispositif de déshumidification et procédé de déshumidification - Google Patents

Déshumidificateur à échange de chaleur et sorption, dispositif de déshumidification et procédé de déshumidification Download PDF

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Publication number
WO2018095880A1
WO2018095880A1 PCT/EP2017/079840 EP2017079840W WO2018095880A1 WO 2018095880 A1 WO2018095880 A1 WO 2018095880A1 EP 2017079840 W EP2017079840 W EP 2017079840W WO 2018095880 A1 WO2018095880 A1 WO 2018095880A1
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Prior art keywords
sorption
chambers
region
cooling
desiccant
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PCT/EP2017/079840
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German (de)
English (en)
Inventor
Alexander Morgenstern
Mohammadreza Safi Zadeh
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Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
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Publication of WO2018095880A1 publication Critical patent/WO2018095880A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B01D53/06—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with moving adsorbents, e.g. rotating beds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/26—Drying gases or vapours
    • B01D53/261—Drying gases or vapours by adsorption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/80—Water
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/06—Polluted air

Definitions

  • the invention relates to sorption dehumidifiers, dehumidifying devices with a sorption dehumidifier and dehumidification process.
  • Devices and methods of this kind can be used for example in air conditioning or in drying processes.
  • the separation of latent and sensible heat in air conditioners is an energy efficient approach to controlling the humidity and temperature of air inside buildings or vehicles because of its lower power consumption.
  • Dehumidification by desiccant is used in this type of air conditioners to latent heat too
  • Desiccant dehumidifying systems are considered to be efficient systems due to two approaches
  • Air conditioners viewed: on the one hand, alternative
  • Control of sensible heat can be increased because the system only has to reduce the sensible heat.
  • Air conditioners used including rotary dehumidifiers with desiccants. These are by the following
  • Characteristics i) they dehumidify the Ambient air continuously; ii) they are simple in design and easy to maintain; and iii) they have a high degree of adsorption due to a thick desiccant layer.
  • the desorption of the sorptive material can also be carried out by means of simple heat sources, such as solar energy or excess heat from other processes.
  • this type of dehumidifying system generally has two problems caused substantially by the heat generated during the adsorption process.
  • the generated heat of adsorption is by the
  • US 7,305,849 B2 discloses an evaporative cooled sorptive heat exchanger in which the adsorption process and evaporative cooling occur at the same time.
  • a quasi-continuous dehumidification process of the air to be dehumidified can be achieved if two sorptive heat exchangers are used in parallel. While one of the heat exchangers adsorbs moisture, the drying material of the other heat exchanger is regenerated by heated air.
  • the US RE 38 181 E describes a heat exchanger in the form of a rotating wheel, which carries an adsorbent material. Similar to the rotary dehumidifiers described, the described dehumidifier rotates between adsorption and regeneration sections. The damp
  • Ambient air passes axially through coated ribs in the adsorption area.
  • the air is dried and
  • Adsorption heat is generated.
  • the ambient air is conducted radially between fins in second channels which are separated from the drying channels by thermally conductive plates.
  • the released adsorption heat in the drying channels is absorbed by the radial air flow. This emerges in the center of the wheel from this and is heated by a heater on. This is followed by the heated regeneration air thus generated in the regeneration area
  • the dehumidification system thus enables a continuous dehumidification process, as it also occurs in rotary dehumidifiers.
  • the sorptive material is also cooled during the adsorption process.
  • the sorptive wheel of the US RE 38 181 E has the problem that the drying material and the wheel store heat during the regeneration process. The stored heat raises the temperature of the sorptive material, ie the drying material, which reduces the adsorption potential.
  • the structure of the dehumidifier of US RE 38 181 E is complicated and during the
  • a sorption dehumidifier comprises a plurality of
  • Sorption chambers a plurality of cooling chambers, the
  • the partitions separate the sorption chambers from the cooling chambers. At least the side of the partitions facing the sorption chambers are at least partially coated with a desiccant.
  • the sorption chambers are adapted to extract moisture from the adsorption by a gas through the desiccant, and the cooling chambers are adapted to guide a cooling medium through which the heat produced during adsorption can be dissipated.
  • the gas and / or the cooling medium are adapted to guide a cooling medium through which the heat produced during adsorption can be dissipated.
  • the sorption hammers and / or the cooling chambers are arranged to guide a drying medium, for example air, in order to extract moisture from the desiccant.
  • the cooling chambers are arranged to guide a pre-cooling medium, for example air, in order to cool the desiccant.
  • the sorption dehumidifier it is possible in the first area of the sorption dehumidifier to dehumidify gas flowing through the sorption dehumidifier, such as air.
  • the gas is passed through sorption chambers, the interior walls of which are at least partially covered by a desiccant, such as silica gel, zeolite, hygroscopic salts, such as lithium chloride, or the like,
  • the desiccant adsorbs
  • the dehumidified gas is passed out of the sorption dehumidifier and e.g. used in an air conditioner.
  • Passing through the sorption chambers of the gas stream still contains a residual moisture.
  • the sorption chambers of the gas stream still contains a residual moisture.
  • the gas stream instead of water, another component can be removed by adsorption, for example, a solvent or a pollutant.
  • adsorption for example, a solvent or a pollutant.
  • cooling chambers are arranged adjacent to the sorption chambers, which share at least those walls with the sorption chambers, which communicate with the sorption chambers
  • Desiccant are at least partially coated. These partitions are preferably made of a thermally conductive material and direct the heat of adsorption of the desiccant in the cooling chamber.
  • Partitions can contain or consist of a metal or an alloy. In some embodiments, the
  • Invention may contain the material of the intermediate walls copper or aluminum. In other embodiments of the
  • the intermediate walls can be a plastic
  • Sorption dehumidifier and optionally discharged from the surrounding air conditioning are Sorption dehumidifier and optionally discharged from the surrounding air conditioning.
  • cooling of the dehumidified gas can also be achieved by cooling the drying agent.
  • a gaseous drying medium which withdraws the desiccant previously absorbed by adsorption moisture again.
  • a regeneration of the drying agent takes place, which is necessary in particular when the drying agent is saturated with moisture in such a way that further absorption of moisture is greatly restricted or even no longer possible.
  • a hot, dry gas such as air, may be used, which flows through the sorption chambers. On the one hand it heats the desiccant by direct contact, on the other hand it can absorb moisture released from the desiccant and carry it out of the sorption chambers. For that in the cooling chambers
  • drying medium used or drying gas it is sufficient if it is hot enough to heat the desiccant over the partitions. Since there is no direct contact between the drying medium fed into the cooling chambers and the desiccant, the amount of moisture contained in the drying medium of the cooling chambers is essentially irrelevant to the regeneration of the desiccant. Therefore, it is possible, for example, hot, dry gas, such as air, when passing through the sorption due to dehydration of the
  • Desiccant has absorbed moisture to conduct for further heating of the drying agent through the cooling chambers. There, the heat is passed through the intermediate walls to the desiccant.
  • the second region of the sorption dehumidifier thus ensures efficient regeneration of the desiccant.
  • a coolant such as air
  • This pre-cooling medium is used to cool the desiccant to a temperature suitable for effective adsorption of moisture, after the moisture previously absorbed in the first region therein has been baked in the second region.
  • the pre-cooling medium flows through only the cooling chambers and not the sorption chambers, and indirectly cools the desiccant over the intermediate walls to prevent adsorption of moisture from the pre-cooling medium, which could limit the efficiency of dehumidification in the first region.
  • the third area of the sorption dehumidifier it is thus ensured that the desiccant on entering the sorption chambers in the first area one for the
  • Dehumidification has appropriate or optimized temperature.
  • Assignment of the areas to the sorption chambers and the cooling chambers changes, i. in a reference system of the sorption desiccator, in which the sorption chambers and cooling chambers have fixed positions, the various regions travel over the sorption dehumidifier.
  • the sorption dehumidifier can be cylindrical. Then, the sorption chambers and the cooling chambers may be formed as segments along an azimuthal direction of the sorption desiccant and the cyclic change
  • the sorption desiccant between the first region, the second region and the third region can be effected by rotation of the sorption desiccant in the azimuthal direction.
  • the individual sorption and cooling chambers formed, for example, alternately.
  • each chamber passes through all three areas in one revolution, so that all desiccant present in the sorption dehumidifier the cycle: adsorption and cooling; baking; Pre-cooling undergoes.
  • An external form of the desiccant dehumidifier may be one
  • the intermediate walls can extend in the radial direction and in the axial direction through the entire hollow cylinder and thus separate the sorption chambers and the cooling chambers in the azimuthal direction.
  • the sorption chambers can be closed in the axial direction and open in the radial direction and the cooling chambers can be open in the axial direction and closed in the radial direction.
  • Sorption chambers only in the radial direction the cooling chambers flow only in the axial direction.
  • the flow through the sorption chambers is preferably carried out from outside to inside, i. the gases exit at the inner cylindrical surface of the hollow cylinder. This ensures that the degree of dehumidification of gases and their temperature is kept stable. Namely, in different sorption chambers due to differences in the state of the
  • Desiccant resulting from manufacturing tolerances and / or the already performed adsorption
  • a dehumidifying device comprises a sorption dehumidifier as described above and a plurality of wires.
  • first lines are arranged to supply the sorption chambers in the first region with the gas, which is deprived of moisture with the desiccant by adsorption, and to remove the gas thus dried.
  • Second lines are adapted to supply the cooling chambers in the first region of the cooling medium, is absorbed by the heat generated during the adsorption, and to dissipate the thus heated cooling medium.
  • third lines are set up to supply the drying medium to the sorption chambers and / or the cooling chambers, which extracts moisture from the desiccant and to remove it.
  • fourth lines are arranged to supply the cooling chambers with the pre-cooling medium, which cools the desiccant, and to dissipate the pre-cooling medium heated thereby.
  • the dehumidifying device further comprises a motor which is adapted to cyclically change the allocation of the sorption chambers and the cooling chambers to the first region, the second region and the third region by turning the sorption desiccant.
  • a dehumidifying device which can supply the above-described sorption dehumidifier in a manner arranged with the gas or fluid streams necessary for its operation.
  • the cooling medium and / or the pre-cooling medium may be a cooling gas.
  • the cooling gas may contain or consist of air.
  • the dehumidifying device may comprise saturation means which are adapted to supersaturate the cooling medium or precooling medium supplied to the cooling chambers in the first region and the third region with water vapor in such a way that it is arranged to cause evaporative cooling.
  • the cooling gas can also be cooled in order to bring it into supersaturation. Due to the supersaturation of the for cooling the Desiccant used medium, such as air, it comes immediately to the evaporation of moisture as soon as the (pre) cooling medium absorbs heat. The resulting evaporation or evaporative cooling increases the
  • the dehumidified gas is cooled more, which in turn may be in air conditioners for further
  • the third lines may be configured to first in the second area the drying medium by the
  • the dry, hot drying medium e.g. Air is passed through the sorption chambers, heats the desiccant contained therein and absorbs moisture released by the desiccant. Thereafter, the drying medium is not ejected, but passed into the cooling chambers, where it serves for further heating of the drying agent through the intermediate walls. So it comes to a heating of the drying agent of two opposite sides. About the sorption chambers, the surface of the drying agent is heated, the cooling chambers and the intermediate walls, the rear side. The desiccant is thus not only faster, but also more uniformly heated, which in turn increases its adsorption potential on the next pass through the first region.
  • the dry, hot drying medium e.g. Air is passed through the sorption chambers, heats the desiccant contained therein and absorbs moisture released by the desiccant. Thereafter, the drying medium is not ejected, but passed into the cooling chambers, where it serves for further heating of the drying agent through the intermediate walls. So it comes to a heating of the drying agent of
  • the dehumidifying device may further include a
  • an optional heating element may be provided which is adapted to further heat the drying medium heated by the heat exchanger and to use it as Add drying medium to the second area of the sorption desiccant.
  • the energy efficiency of the heating of the drying agent in the second area is further increased.
  • a heat exchanger Instead of discharging the drying medium into the environment after passing through the sorption dehumidifier, it is passed to a heat exchanger and gives off its heat to the drying medium, eg air, which is provided for drying purposes, before it in the heating element has to be heated to the desiccant Temperature is brought and passed into the sorption dehumidifier.
  • the dehumidifying device may further include movably mounted release means defining the first region, the second region, and the third region.
  • the separating means are adapted to prevent the passage of gases and / or fluids flowing into the sorption dehumidifier or out of the sorption dehumidifier, i. Media, from the first area, the second area or the third area to prevent one of the other areas.
  • the release agent can also be connected in a mobile manner with the sorption dehumidifier and then represent a part of the sorption desiccant.
  • the release agents define next to the various release agents
  • the separation means ensure that gas to be dehumidified entering the sorption chambers in the first region does not enter the sorption chambers of the second region and the third region. In addition, they ensure that dehumidified gas leaving the sorption chambers does not return to the sorption dehumidifier, but to another
  • the drying medium can only penetrate into the sorption chambers of the second area.
  • the drying medium is either ejected or passed into the cooling chambers of the second region.
  • the separating means also separate the stream into the cooling chambers of the second
  • Range of that in the cooling chambers of the first and third areas is also possible if these currents should have different properties.
  • the sizes of the different areas can be adjusted.
  • the rotational speed of the sorption desiccant it is possible to set the times in which the different chambers are used for dehumidification, regeneration or pre-cooling. The shift of
  • Release agent can either by hand or over
  • the separating means are in this case preferably designed as movably arranged, sliding seals.
  • the separating means can be used.
  • a dehumidifying method for dehumidifying air by a dehumidifier as described above includes: passing a gas, for example, air, through the sorption chambers in the first area, drying the gas through the desiccant in the sorption chambers in the first area, discharging the dried gas the sorption dehumidifier and passing a cooling gas, such as air, through the cooling chambers in the first region and in the third region to cool the desiccant in adjacent sorption chambers.
  • a gas for example, air
  • the method further comprises: passing heated drying medium, such as air, through the sorbent chambers and / or the cooling chambers in the second region, to add moisture to the desiccant withdrawing and rotating the sorption desiccant to cycle sorption chambers and cooling chambers from the first area to the second area, from the second area to the third area, and from the third area back to the first area.
  • heated drying medium such as air
  • the dehumidification process allows gases, such as
  • the gas is dehumidified by the desiccant in the sorption chambers.
  • the resulting heat is efficient by the super-saturated with water vapor cooling gas
  • the thus also cooled, dehumidified gas is for further use, e.g. in an air conditioner, ejected.
  • the sorption chambers are heated in the second region and brought in the third region indirectly via the precooling medium to a temperature which a
  • the heat of the heated drying medium can then be used after passing through the cooling chambers in the second region for preheating the drying medium, which is then passed after passing through an optional heating element as a heated drying medium in the sorption chambers in the second area.
  • the heat of the drying medium is used three times: to heat the top of the desiccant in the sorption chambers, to heat the back of the desiccant over the
  • gases and media described above may be all the ambient air surrounding the sorption dehumidifier or the dehumidifier.
  • the described devices are then used for dehumidifying ambient air, preferably in air conditioning systems, eg in
  • Both the heating and the cooling of the drying agent is then carried out with appropriately pretreated, i. heated or cooled and / or supersaturated with water vapor ambient air. This allows the cooling of air without the need to provide additional cooling or drying media.
  • the adsorption potential can be further increased.
  • the energy efficiency is further increased by the multiple use of the heat of the medium used for heating.
  • dehumidification can be carried out continuously; ii) an increased adsorption potential can be achieved through the use of evaporative cooling during adsorption, whereby the dehumidified gas is simultaneously cooled; Inserting a pre-cooling phase (third area) after the regeneration phase (second area), the adsorption potential can be obtained by cooling the previously heated during the regeneration
  • Drying agent can be increased and iv) by the three times the reuse of the drying medium, the
  • FIG. 1 is a schematic representation of sorption chambers and cooling chambers or regeneration chambers according to an embodiment
  • FIG. 2 is a schematic representation of a sorption chamber delimited by intermediate walls according to an embodiment
  • FIG. 3 is a schematic representation of a sorption desiccant according to an embodiment
  • Fig. 4 is a schematic representation of a
  • Fig. 5 is a schematic side view of a
  • FIG. 6 is a schematic plan view of the conduit system of FIG. 5.
  • FIG. 1 schematically shows the construction of sorption chamber 110 and cooling chambers or regeneration chambers 120 of a sorption desiccant 100. Sorption chambers 110 are separated from adjacent cooling chambers 120 by a common intermediate wall 130.
  • the intermediate wall 130 in this case preferably consists of a material of high
  • the sorption chambers 110 form a process channel through which a gas to be dehumidified, such as air, flows. This is in Fig. 1 by the in the positive x-direction
  • the gas enters into direct contact with a desiccant 140 which is applied on the side of the sorption chambers 110 on the intermediate walls 130.
  • the desiccant 140 has strong adsorptive properties and is designed to extract moisture from the gas as it flows past, thereby drying the gas.
  • the desiccant 140 may be, for example, a layer of granular silica gel, zeolite or the like. The thickness of the layer is determined by the desired adsorption and in principle arbitrary.
  • the adsorption of moisture in the drying agent 140 releases heat, which heats the desiccant 140 and the intermediate walls 130. To dissipate this heat, flows through the cooling chambers 120, a stream of cooling medium, such as air or water.
  • the direction of the flow of the cooling medium in the cooling chambers 120 may be the
  • Crossing direction of the current in the sorption chambers 110 and, for example, as shown in Fig. 1, perpendicular or in the
  • Desiccant to absorb moisture from the environment is reduced.
  • the gas flowing through the sorption chambers 110 is cooled, which has the advantage, in particular when using air in air conditioning systems, that subsequent cooling is less energy-intensive.
  • ambient air may be used as the cooling medium, which is pretreated in such a way that it causes evaporative cooling of the intermediate walls 130 and thus of the desiccant 140 during the passage through the cooling chambers 120.
  • air may be cooled and / or so saturated with moisture prior to entering the cooling chambers 120 or moistened during passage of the cooling chambers 120 such that heating of the supersaturated air immediately results in evaporation and thus cooling of the intermediate walls 130.
  • drying agent 140 only a limited amount
  • a heated drying medium such as heated ambient air, which contains as little moisture through the
  • a hot drying medium flows through the cooling chambers and heats the intermediate walls 130. These forward the heat to the desiccant 140, which is thereby heated at its rear side.
  • the drying agent 140 is thus uniformly heated and thus the
  • Sorption chambers 110 contain more moisture.
  • the stream of drying medium may first be passed through the sorption chambers 110 and then through the cooling chambers 120.
  • desiccant 140 and sorbent desiccant material are 100
  • the sorption chambers 110 and the cooling chambers 120 may be precooled in a third phase of operation before being reused for dehumidification.
  • the cooling chambers 110 are flowed through by a pre-cooling medium in order to cool the drying agent 140 indirectly via the heat-conducting intermediate walls 130.
  • the cooling medium can also assist in this an additional evaporative cooling, for example by using a supersaturated with water vapor gas, such as air, for cooling.
  • the cooling of the cooling chambers 120 can be exactly the same in the adsorption and during precooling. But it is also possible to choose different settings in terms of the cooling medium in both phases.
  • FIG. 2 shows a single pair of intermediate walls 130 coated with desiccant 140 which form a sorption chamber 110 in their interior.
  • the sorption dehumidifier 100 shown in Fig. 3 comprises a plurality of sorption chambers 110 and a plurality of cooling chambers 120, which according to the principle described above for the adsorption of
  • the intermediate walls 130 in this case extend completely through both in the radial and in the axial direction
  • Desorption dehumidifier 100 In the azimuthal direction, the sorption dehumidifier 100 is segmented into the sorption chambers 110 and the cooling chambers 120. The number of sorption chambers 110 depends on the desired dehumidifying performance of the desiccant dehumidifier 100.
  • the sorption chambers 110 can only be traversed by gas in the radial direction.
  • the sorption chambers 110 are closed, e.g. by connecting the partitions 130 to another wall. Gas then flows over the outer cylindrical surface 102 in the
  • cooling chambers are open in the axial direction and in the radial direction by plates attached to the inner and outer cylindrical surfaces 102, 104
  • the inner cylindrical surface 102 and the outer cylindrical surface 104 of the desiccant dehumidifier 100 are per se continuous surfaces, which only at the
  • Liquids or gases can therefore flow in the axial direction through the cooling chambers 120, as indicated in FIG. 3 by the arrow B.
  • sorption chambers 110 and cooling chambers 120 are arranged alternately in the azimuthal direction. This allows the most efficient use of space. But it is also possible to arrange the chambers differently, as long as a cooling chamber 120 always to one with desiccant 140th
  • coated partition 130 i. to a sorption chamber 110, adjacent.
  • a configuration is shown in which a flow in the sorption chambers 110 only in the radial
  • the sorption chambers 110 and the cooling chambers 120 are partitioned by separating means 150 into various regions in which the various process phases described above with reference to FIG. 1 take place.
  • the separating means 150 initially comprise along an upper edge 106 and along a lower edge 108 of the
  • Sorptionsentfeuchters 100 circumferential sealing rings 156, 158. These are arranged to separate in the radial direction of the sorption dehumidifier 100 incoming media flowing in the axial direction media to.
  • the separating means 150 include boundaries 152, 153, 154 defining a first area I, a second area II and a third area III.
  • the delimitation 152 between the first region I and the second region II in this case separates both axial flows in the first region I from axial flows in the second region II and radial flows in the first region I from radial
  • the boundary 153 between the second area II and the third area III separates both types of flows between the two areas.
  • the boundary 154 extends only along the axial direction of the sorption dehumidifier 100, but not in its radial direction. So it just separates the
  • the separating means 150 ensure that dehumidified gas flowing into the inner region in the first region I is passed out of the sorption dehumidifier and not in the radial direction from the inside to the outside through the sorption chambers 110 into the second region II or the third Area III flows. In the same way, a transfer of the drying medium from the second region II into the other two regions in the inner region of the sorption desiccant 100 is prevented. This can be ensured, for example, by the fact that, in the inner region of the sorption dehumidifier 100, partition walls extend in the axial direction over the entire height of the sorption desiccant 100, which separate all areas from one another.
  • the segment of the third region III is closed inside the sorption desiccant 100 at the front and back of the sorption desiccant.
  • the segment of the first region I is closed only on one of the front or back, while the segment of the second region is closed on the other one of the front or back.
  • flows in the first region I, ie at the back, are guided in the axial direction of the sorption dehumidifier 100, while flows are discharged in the second region at the front and no flow from the interior of the sorption desiccant ago in the sorption chambers 110 can penetrate in the third area III.
  • the separating means 150 can be achieved that the various functions of the sorption chambers 110 and the cooling chambers 120, as described with reference to FIG. 1
  • the sorption chambers 110 are supplied with the gas to be dehumidified from outside. It flows through the sorption chambers 110 into the interior of the desiccant dehumidifier 100. There, it is prevented by the separating means 150 from passing into other regions and is guided out of the sorption dehumidifier 100. At the same time flows through in the first area I the cooling medium, the cooling chambers 120 in the radial direction and thus leads to the resulting from the adsorption heat from the dehumidifying gas and the drying agent 140 from.
  • Drying agent 140 bring about.
  • the drying medium initially flows radially through the sorption chambers 110 inwardly, thereby leading to the in the
  • the separating means 150 directs the flow out of the sorption dehumidifier 100 in such a way that it can be conducted in the axial direction through the cooling chambers 120, which leads to a further heating of the intermediate walls 130 and of the desiccant 140 arranged thereon.
  • flows of drying medium through the sorption chambers 110 and the cooling chambers 120 can also be formed completely independently of each other.
  • the sorption dehumidifier 100 is slowly rotated along the azimuthal direction, as indicated by the arrow C in FIG. As a result, the sorption chambers 110 and the cooling chambers 120 arrive cyclically in succession from the first region I in which the adsorption process takes place second area II, in which the drying agent 140th
  • the rotation is mediated for example by a motor. Your speed can be freely adjustable. In some
  • Stepper motor which in addition to the continuous or quasi-continuous operation alternatively or
  • the sorption dehumidifier can be preset in
  • the separating means 150 are in sealing, sliding contact with the sorption dehumidifier 100 in order to ensure the separation into the different areas can.
  • the release agent 150 can either be part of the
  • Sorptionsentfeuchuchter 100 or a dehumidifier are considered, in which the sorption dehumidifier 100 is installed or integrated.
  • the release agent consist in one embodiment of an elastic material, such as abrasive rubber seals or with
  • sealing materials coated body may be selected from rubber or graphite or amorphous diamond-like carbon or polytetrafluoroethylene.
  • Chambers of the sorption desiccant in different areas can be fixed, ie fixed in the preparation of the release agent 150 by shaping, be.
  • the division can also be freely adjustable by the possibility of moving the delimitations 152, 153, 154 between the regions. It is then possible to assign each of the individual areas a certain size or a certain range of angles, which then the relative length of stay of Chambers at constant rotational speed in the areas determined. Together with the freely adjustable rotational speed can be determined by how long the running in each area phases, ie adsorption phase, regeneration phase and pre-cooling last.
  • the adsorption phase and the regeneration phase are about the same length and the pre-cooling phase is short in comparison. In other embodiments of the invention, the adsorption and regeneration phases differ in length.
  • the release agent 150 can be adjusted by hand, which requires accessibility to the release means 150 from the outside.
  • the position of the release agent 150 may also be internal by a dehumidifier
  • FIG. 4 shows schematically the installation of sorption desiccant 100 in the pipe system of a dehumidifying device.
  • the boundary 152 between the first area I and the second area II can be seen in front left in FIG. 4.
  • arranged lines ensure that cooling medium flows through the cooling chambers 120.
  • lines ensure that drying medium flows through the chambers.
  • the drying medium is here by the arcuate transition after passing through the
  • the dehumidified gas flows radially to the sorption dehumidifier 100 in the first region I from the outside and is guided by the corresponding sorption chambers 110 inwardly and thereby dehumidified. It exits from inside the sorption dehumidifier in the axial direction downwards.
  • the drying medium flows from the outside radially through the sorption dehumidifier 100 before it passes through the
  • Line system is passed through the cooling chambers 120 in the second region II.
  • the sorption dehumidifier 100 need not be arranged horizontally. In addition to a horizontal arrangement of the
  • Sorptionsentfeuchters is also a vertical or any other arrangement conceivable to make the best use of the available space.
  • FIG. 5 again illustrates the streams fed to and removed from the sorption dehumidifier 100 in a dehumidifying device and the dehumidifying method carried out as a result.
  • the gas to be dehumidified e.g. Air, in particular ambient air
  • the sorption chambers 110 in the first region I flows through them and is discharged via the discharge line 2 from the dehumidifying device for further use, e.g. in an air conditioner, discharged.
  • the feed line 3 carries the cooling medium, preferably a cooled gas supersaturated with water vapor, eg air, in particular ambient air, in the axial direction through the cooling chambers in the first region I and / or in the third region III in order to cool or pre-cool the desiccant 140.
  • the saturation or cooling can be done by the supply line 3 upstream, not shown, saturation means of the dehumidifier.
  • the derivative 4 it is removed from the dehumidifier.
  • the drying medium for example air, in particular ambient air
  • a heating element 160 is supplied and heated there to a set up for the regeneration of the drying means 140 temperature.
  • the heating element 160 may be, for example, an electric heating unit or by means of heat from solar energy, an exhaust gas stream or residual or excess heat from other systems, such as a
  • the heating element 160 may also be outside the dehumidifying device and / or
  • Sorptionshuntn 110 performed in the second region II and absorbs moisture from the desiccant 140 there.
  • the drying medium is then brought out of the interior of the sorption desiccant 100 out in the supply line 9, from which it is in the cooling chambers 120 in the second
  • Partition walls 130 are Partition walls 130.
  • the drying medium is then fed via the discharge line 10 to a heat exchanger 170, which transfers the heat still remaining in the drying medium to the drying medium newly flowing in via the feed line 5 in order to preheat the latter before it enters the heating element 160.
  • Drying medium stored heat is thus best utilized to reduce energy consumption.
  • FIG. 5 has only eight Zu- or
  • the conduit system of the dehumidifying device is shown schematically in plan view.
  • the boundaries 152, 153, 154 between the first area I, the second area II and the third area III are shown. These boundaries are thus accessible from outside the conduit system and may be here e.g. be manually or automatically changed in position to adjust the size of each area.
  • the size of each individual area I, II and III can according to the boundary conditions of temperature and humidity of the individual gas streams to be dehumidified
  • the system may be combined with other air treatment methods such as e.g. membrane-based enthalpy recovery.
  • the described devices and methods can be used for dehumidifying gases for all conceivable processes.
  • the use for dehumidifying ambient air in air conditioning systems e.g. in rooms or vehicles, as described

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Drying Of Gases (AREA)
  • Central Air Conditioning (AREA)

Abstract

L'invention concerne un déshumidificateur à sorption (100) comportant une pluralité de chambres de sorption (110) ; une pluralité de chambres de refroidissement (120) qui sont disposées de manière adjacente aux chambres de sorption (110) ; et des parois intermédiaires (130) qui séparent les chambres de sorption (110) des chambres de refroidissement (120), au moins les côtés tournés vers les chambres de sorption (110) étant revêtus au moins partiellement d'un agent déshydratant (140) ; les chambres de sorption (110) dans une première zone (I) du déshumidificateur à sorption (100) étant conçues pour retirer par adsoprtion de l'humidité d'un gaz, en particulier de l'air, à l'aide de l'agent déshydratant (140) ; les chambres de refroidissement (120) dans la première zone (I) étant conçues pour guider un agent de refroidissement au moyen duquel la chaleur produite lors de l'adsorption peut être évacuée ; les chambres de sorption (110) et/ou les chambres de refroidissement (120) dans une deuxième zone (II) du déshumidificateur à sorption (100) étant conçues pour guider un milieu déshydratant afin de retirer de l'humidité de l'agent déshydratant (140) ; les chambres de refroidissement (120) dans une troisième zone (III) du déshumidificateur à sorption (100) étant conçues pour guider un milieu de pré-refroidissement afin de refroidir l'agent déshydratant (140) ; et une association des chambres de sorption (110) et des chambres de refroidissement (120) pouvant alterner cycliquement de la première zone (I) à la deuxième zone (II), de la deuxième zone (II) à la troisième zone (III) et de la troisième zone (III) de nouveau à la première zone (I). L'invention concerne en outre un dispositif de déshumidification équipé de ce déshumidificateur à sorption ainsi qu'un procédé de déshumidification.
PCT/EP2017/079840 2016-11-22 2017-11-21 Déshumidificateur à échange de chaleur et sorption, dispositif de déshumidification et procédé de déshumidification WO2018095880A1 (fr)

Applications Claiming Priority (2)

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DE102016222991.5A DE102016222991A1 (de) 2016-11-22 2016-11-22 Sorptionsentfeuchter, Entfeuchtungsvorrichtung und Verfahren zur Entfeuchtung
DE102016222991.5 2016-11-22

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5878590A (en) * 1998-02-25 1999-03-09 General Motors Corporation Dehumidifying mechanism for auto air conditioner with improved space utilization and thermal efficiency
WO2003095917A2 (fr) * 2002-05-10 2003-11-20 Motta, Mario, Gualtiero, Francesco Echangeur de chaleur a sorption et procede de sorption par refroidissement correspondant
WO2010069602A2 (fr) * 2008-12-19 2010-06-24 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Appareil pour la répartition de fluides et leur échange de chaleur et/ou de matière

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3371247D1 (en) * 1982-11-04 1987-06-04 Matsushita Electric Ind Co Ltd Heat exchanger

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5878590A (en) * 1998-02-25 1999-03-09 General Motors Corporation Dehumidifying mechanism for auto air conditioner with improved space utilization and thermal efficiency
USRE38181E1 (en) 1998-02-25 2003-07-15 Delphi Technologies, Inc. Dehumidifying mechanism for auto air conditioner with improved space utilization and thermal efficiency
WO2003095917A2 (fr) * 2002-05-10 2003-11-20 Motta, Mario, Gualtiero, Francesco Echangeur de chaleur a sorption et procede de sorption par refroidissement correspondant
EP1508015A2 (fr) * 2002-05-10 2005-02-23 Motta, Mario Gualtiero Francesco Echangeur de chaleur a sorption et procede de sorption par refroidissement correspondant
US7305849B2 (en) 2002-05-10 2007-12-11 Mario Gualtiero Francesco Motta Sorptive heat exchanger and related cooled sorption process
WO2010069602A2 (fr) * 2008-12-19 2010-06-24 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Appareil pour la répartition de fluides et leur échange de chaleur et/ou de matière

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