Heat and humidity recovery device for porous ceramic membrane filled with metal foam

Abstract

The utility model relates to the technical field of flue gas energy recovery, in particular to a porous ceramic membrane heat and humidity recovery device filled with metal foam, which comprises a heat insulation air duct. The device further comprises six upper external reverse spiral tube type ceramic membranes; according to the utility model, the reverse spiral tube type ceramic membrane and the positive spiral tube type ceramic membrane which are attached to each other are arranged; waste gas enters the heat insulation air duct and then sequentially enters six channels separated by the upper inner reverse spiral pipe type ceramic membrane and the upper outer reverse spiral pipe type ceramic membrane which are attached to each other and six channels separated by the middle inner positive spiral pipe type ceramic membrane and the middle outer positive spiral pipe type ceramic membrane which are attached to each other. In a channel separated by a lower inner reverse spiral tube type ceramic membrane and a lower outer reverse spiral tube type ceramic membrane which are attached to each other, two times of direction change of the spiral channel can enable air in the channel to damage the stable state of air flow generated due to inertia through impact when the direction of the air is changed; the positions of waste gas and water vapor in the center of the channel and waste gas and water vapor on the outer layer are exchanged.

Description

Technical Field

[0001] This utility model relates to the field of flue gas energy recovery technology, and in particular to a porous ceramic membrane heat and moisture recovery device filled with metal foam. Background Technology

[0002] In industrial production, there are common problems of high temperature and high humidity in flue gas emissions, which have adverse effects on the environment and energy. Therefore, it is essential to recover moisture and heat from flue gas. Among flue gas moisture and heat recovery technologies, membrane separation has advantages such as simple system and high quality of recovered water, and has received widespread attention in the recovery technology field.

[0003] In the operation of a porous ceramic membrane heat and humidity recovery device filled with metal foam, namely a metal-based porous ceramic composite membrane heat and humidity recovery device, in order to increase the contact efficiency between the waste gas and the composite membrane, the composite membrane needs to be arranged relatively densely. However, this will cause greater resistance to the passage of waste gas, thereby significantly reducing the passage efficiency of waste gas.

[0004] Therefore, in the aforementioned heat and humidity recovery device using a metal-based porous ceramic composite membrane, the dense arrangement of the composite membrane, while increasing the contact efficiency between the waste gas and the composite membrane, also creates significant resistance to the passage of the waste gas, thus drastically reducing the waste gas passage efficiency. To address this, a heat and humidity recovery device using a porous ceramic membrane filled with metal foam can be designed. This design allows the waste gas to undergo two changes of direction within the spiral channel, disrupting the stable airflow caused by inertia. This allows the waste gas and water vapor at the center of the channel to exchange positions with those on the outer layer, enabling the water vapor to contact the composite membrane uniformly and efficiently. This method, besides increasing the composite membrane arrangement density, increases the contact efficiency between the waste gas and the composite membrane. Utility Model Content

[0005] In order to overcome the problem that in the operation of the heat and humidity recovery device based on metal porous ceramic composite membrane, although the densely arranged composite membrane inside increases the contact efficiency between the waste gas and the composite membrane, it also creates a large resistance to the passage of waste gas, thus greatly reducing the waste gas passage efficiency.

[0006] The technical solution of this utility model is as follows: a porous ceramic membrane heat and humidity recovery device filled with metal foam, including a heat-insulating air duct; and six upper outer reverse spiral tube ceramic membranes. Six upper outer reverse spiral tube ceramic membranes are arranged in a circumferential array on the inner side of the heat-insulating air duct. A middle outer positive spiral tube ceramic membrane is fixedly connected to the lower end of each upper outer reverse spiral tube ceramic membrane, and a lower outer reverse spiral tube ceramic membrane is fixedly connected to the lower end of each middle outer positive spiral tube ceramic membrane. Six upper inner reverse spiral tube ceramic membranes are arranged in a circumferential array on the inner side of the upper outer reverse spiral tube ceramic membranes. The spiral tube ceramic membrane has a middle inner positive spiral tube ceramic membrane fixed to the lower end of the upper inner reverse spiral tube ceramic membrane, and a lower inner reverse spiral tube ceramic membrane fixed to the lower end of the middle inner positive spiral tube ceramic membrane. A manifold valve is fixed to the upper end and the lower end of the inner side of the heat insulation air duct. The inner sides of the upper inner reverse spiral tube ceramic membrane, the middle inner positive spiral tube ceramic membrane, the lower inner reverse spiral tube ceramic membrane, the upper outer reverse spiral tube ceramic membrane, the middle outer positive spiral tube ceramic membrane, and the lower outer reverse spiral tube ceramic membrane are all filled with metal foam filler.

[0007] Preferably, after the exhaust gas enters the heat-insulating duct, it sequentially passes through six channels separated by mutually bonded upper inner reverse spiral tube ceramic membranes and upper outer reverse spiral tube ceramic membranes, channels separated by mutually bonded middle inner positive spiral tube ceramic membranes and middle outer positive spiral tube ceramic membranes, and channels separated by mutually bonded lower inner reverse spiral tube ceramic membranes and lower outer reverse spiral tube ceramic membranes. From top to bottom, the exhaust gas descends counterclockwise, clockwise, and then twice counterclockwise. The spiral channels and the tubular shape of the ceramic membranes increase the contact area between the exhaust gas and the metal-based porous ceramic composite membrane. Furthermore, the two changes in direction within the spiral channels allow the air within the channels to disrupt the stable airflow caused by inertia through impact during these changes, enabling the exhaust gas and water vapor at the center of the channel to exchange with the exhaust gas and water vapor at the outer layer. The water vapor is positioned to allow for uniform and efficient contact with the composite membrane. Simultaneously, cooling water is diverted through a manifold valve at the top to the metal foam fillers within the six upper inner reverse spiral ceramic membranes and six upper outer reverse spiral ceramic membranes. Finally, it converges through a manifold valve at the bottom and flows out of the heat-insulating duct. During this process, water vapor absorbs heat from each spiral ceramic membrane upon contact with it. After condensing into droplets, the water vapor flows capillarily into the interior of each spiral ceramic membrane, merging with the cooling water flowing within the metal foam fillers to complete the wet heat recovery. The cooling water, due to its surface tension, cannot seep back out of the spiral ceramic membranes. Furthermore, the metal foam fillers, with their high thermal conductivity and large porosity, not only enhance the heat exchange capacity of the spiral ceramic membranes but also serve as a supporting framework for them.

[0008] Preferably, the lower end face of the upper manifold valve is fixedly connected and communicates with the upper end faces of the six upper inner reverse spiral tube ceramic diaphragms and the six upper outer reverse spiral tube ceramic diaphragms, and the upper end face of the lower manifold valve is fixedly connected and communicates with the lower end faces of the six lower inner reverse spiral tube ceramic diaphragms and the six lower outer reverse spiral tube ceramic diaphragms.

[0009] Preferably, the upper inner reverse spiral tube ceramic membrane, the lower inner reverse spiral tube ceramic membrane, the upper outer reverse spiral tube ceramic membrane, and the lower outer reverse spiral tube ceramic membrane are all configured as tubular shapes with a counterclockwise spiral half turn, while the middle inner positive spiral tube ceramic membrane and the middle outer positive spiral tube ceramic membrane are all configured as tubular shapes with a clockwise spiral half turn.

[0010] Preferably, the two adjacent upper inner reverse spiral tube ceramic membranes and the upper outer reverse spiral tube ceramic membranes, the two adjacent middle inner positive spiral tube ceramic membranes and the middle outer positive spiral tube ceramic membranes, and the two adjacent lower inner reverse spiral tube ceramic membranes and the lower outer reverse spiral tube ceramic membranes are all configured to be mutually bonded.

[0011] Preferably, the upper end face of the manifold valve at the upper end is fixedly connected to and connected to an inlet pipe, and the lower end face of the manifold valve at the lower end is fixedly connected to and connected to an outlet pipe.

[0012] Preferably, an air inlet pipe is fixedly connected to the upper end of the heat insulation air duct, and an air outlet pipe is fixedly connected to the lower end of the heat insulation air duct. The liquid inlet pipe passes through the air inlet pipe, and the liquid outlet pipe passes through the air inlet and outlet pipes.

[0013] Preferably, a central column is fixedly connected to the middle of the two manifold valves, and six inner positioning strips are fixedly connected to the outer wall of the central column, while six outer fixing strips are fixedly connected to the inner wall of the heat insulation air duct.

[0014] Preferably, both the inner positioning strip and the outer fixing strip are positioned between the two manifold valves, and the inner positioning strip is attached to the upper inner reverse spiral tube ceramic membrane, the middle inner positive spiral tube ceramic membrane and the lower inner reverse spiral tube ceramic membrane, and the outer fixing strip is attached to the upper outer reverse spiral tube ceramic membrane, the middle outer positive spiral tube ceramic membrane and the lower outer reverse spiral tube ceramic membrane.

[0015] The beneficial effects of this utility model are:

[0016] By setting up mutually bonded reverse spiral tube ceramic membranes and positive spiral tube ceramic membranes, after the exhaust gas enters the heat-insulating air duct, it will sequentially pass through six channels separated by mutually bonded upper inner and upper outer reverse spiral tube ceramic membranes, channels separated by mutually bonded middle inner and middle outer positive spiral tube ceramic membranes, and channels separated by mutually bonded lower inner and lower outer reverse spiral tube ceramic membranes. From top to bottom, it will rotate downwards in a counterclockwise direction, then clockwise, and finally a second counterclockwise rotation. The spiral channel and the tubular shape of the ceramic membrane increase the contact area between the exhaust gas and the metal-based porous ceramic composite membrane. The two reversals of the spiral channel also allow the air inside the channel to disrupt the stable airflow caused by inertia through impact during the reversal, so that the exhaust gas and water vapor at the center of the channel can exchange positions with the exhaust gas and water vapor on the outer layer. This allows the water vapor to contact the composite membrane evenly and efficiently, thereby reducing the density of the composite membrane in the heat and humidity recovery device of the metal-based porous ceramic composite membrane, reducing the resistance encountered by the exhaust gas when it passes through, and thus improving the exhaust gas passage efficiency. Attached Figure Description

[0017] Figure 1 The diagram shown is a schematic representation of the overall structure of the porous ceramic membrane heat and moisture recovery device filled with metal foam according to this utility model.

[0018] Figure 2 The diagram shown is a schematic of the liquid inlet pipe structure of the porous ceramic membrane heat and humidity recovery device filled with metal foam according to this utility model.

[0019] Figure 3 The diagram shown is a schematic of the upper inner reverse spiral tube ceramic membrane structure of the porous ceramic membrane heat and humidity recovery device filled with metal foam of this utility model.

[0020] Figure 4 The diagram shown is a schematic representation of the metal foam filling structure of the porous ceramic membrane heat and moisture recovery device filled with metal foam according to this utility model.

[0021] Figure 5 The diagram shown is a schematic diagram of the manifold valve structure of the porous ceramic membrane heat and moisture recovery device filled with metal foam according to this utility model.

[0022] Figure 6 The diagram shown is a schematic representation of the central column structure of the porous ceramic membrane heat and moisture recovery device filled with metal foam according to this utility model.

[0023] Figure 7 The diagram shown is a schematic of the heat insulation duct structure of the porous ceramic membrane heat and moisture recovery device filled with metal foam according to this utility model.

[0024] Explanation of reference numerals in the attached diagram: 1. Upper inner reverse spiral tube ceramic membrane; 2. Middle inner positive spiral tube ceramic membrane; 3. Lower inner reverse spiral tube ceramic membrane; 4. Upper outer reverse spiral tube ceramic membrane; 5. Middle outer positive spiral tube ceramic membrane; 6. Lower outer reverse spiral tube ceramic membrane; 7. Metal foam filler; 8. Manifold valve; 9. Insulated air duct; 10. Liquid inlet pipe; 11. Liquid outlet pipe; 12. Air inlet pipe; 13. Air outlet pipe; 14. Central column; 15. Inner positioning strip; 16. Outer fixing strip. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0026] Please see Figures 1-7This utility model provides an embodiment of a porous ceramic membrane heat and humidity recovery device filled with metal foam, including a heat-insulating duct 9; it also includes six upper outer reverse spiral tube ceramic membranes 4, with six upper outer reverse spiral tube ceramic membranes 4 arranged in a circumferential array on the inner side of the heat-insulating duct 9, and a middle outer positive spiral tube ceramic membrane 5 fixedly connected to the lower end of each upper outer reverse spiral tube ceramic membrane 4, and a lower outer reverse spiral tube ceramic membrane 6 fixedly connected to the lower end of each middle outer positive spiral tube ceramic membrane 5. Inside the upper outer reverse spiral tube ceramic membranes 4, six upper inner reverse spiral tube ceramic membranes 1 are arranged in a circumferential array, with a middle inner positive spiral tube ceramic membrane 2 fixedly connected to the lower end of each upper inner reverse spiral tube ceramic membrane 1, and a lower inner reverse spiral tube ceramic membrane 6 fixedly connected to the lower end of each middle inner positive spiral tube ceramic membrane 2. A manifold valve 8 is fixedly connected to both the upper and lower ends of the inner side of the ceramic membrane 3 and the heat insulation duct 9. Metal foam filler 7 is filled inside the upper inner reverse spiral tube ceramic membrane 1, the middle inner positive spiral tube ceramic membrane 2, the lower inner reverse spiral tube ceramic membrane 3, the upper outer reverse spiral tube ceramic membrane 4, the middle outer positive spiral tube ceramic membrane 5, and the lower outer reverse spiral tube ceramic membrane 6. After the exhaust gas enters the heat insulation duct 9, it will sequentially pass through six channels separated by the mutually bonded upper inner reverse spiral tube ceramic membrane 1 and upper outer reverse spiral tube ceramic membrane 4, the channels separated by the mutually bonded middle inner positive spiral tube ceramic membrane 2 and middle outer positive spiral tube ceramic membrane 5, and the channels separated by the mutually bonded lower inner reverse spiral tube ceramic membrane 3 and lower outer reverse spiral tube ceramic membrane 6. In the exiting channel, the air descends in a counter-clockwise direction, then clockwise, and then again counter-clockwise. The spiral channel and the tubular shape of the ceramic membrane increase the contact area between the exhaust gas and the metal-based porous ceramic composite membrane. The two reversals of the spiral channel also disrupt the airflow stability caused by inertia during these reversals, allowing the exhaust gas and water vapor at the center of the channel to exchange positions with those on the outer layer. This ensures that the water vapor can contact the composite membrane evenly and efficiently. Simultaneously, cooling water is diverted through the upper manifold valve 8 to the metal foam filler 7 within the six upper inner counter-spiral tube ceramic membranes 1 and the six upper outer counter-spiral tube ceramic membranes 4, and finally passes through the lower end... The manifold valve 8 collects and flows out of the heat-insulating air duct 9. During this process, water vapor is absorbed by the cooling water after contacting each spiral tube ceramic membrane. After the water vapor condenses into droplets, it flows into the interior of each spiral tube ceramic membrane due to capillary action and merges with the cooling water flowing in the metal foam filler 7 to complete the wet heat recovery. The cooling water cannot seep out to the outside of the spiral tube ceramic membrane due to its own surface tension. The metal foam filler 7, due to its strong thermal conductivity and large porosity, can not only enhance the heat exchange capacity of the spiral tube ceramic membrane, but also serve as a supporting skeleton for the spiral tube ceramic membrane. The lower end face of the manifold valve 8 at the upper end is fixed and connected to the upper end face of the six upper inner reverse spiral tube ceramic membranes 1 and the six upper outer reverse spiral tube ceramic membranes 4.The upper end face of the lower manifold valve 8 is fixedly connected and communicates with the lower end faces of six lower inner reverse spiral tube ceramic diaphragms 3 and six lower outer reverse spiral tube ceramic diaphragms 6. The upper inner reverse spiral tube ceramic diaphragm 1, lower inner reverse spiral tube ceramic diaphragm 3, upper outer reverse spiral tube ceramic diaphragm 4, and lower outer reverse spiral tube ceramic diaphragm 6 are all tubular with a counter-clockwise spiral half-turn. The middle inner positive spiral tube ceramic diaphragm 2 and middle outer positive spiral tube ceramic diaphragm 5 are both tubular with a clockwise spiral half-turn. Adjacent upper inner reverse spiral tube ceramic diaphragms 1 and 4, adjacent middle inner positive spiral tube ceramic diaphragms 2 and 5, and adjacent lower inner reverse spiral tube ceramic diaphragms 3 and lower outer reverse spiral tube ceramic diaphragms 6 are all designed to be mutually bonded.

[0027] Please see Figures 5-7 In this embodiment, the upper end face of the upper manifold valve 8 is fixedly connected to and connected to the inlet pipe 10, and the lower end face of the lower manifold valve 8 is fixedly connected to and connected to the outlet pipe 11. Cooling water enters the upper manifold valve 8 through the inlet pipe 10 and then flows into the outlet pipe 11 from the lower manifold valve 8 to be discharged. The upper end of the heat insulation duct 9 is fixedly connected to the air inlet pipe 12, and the lower end of the heat insulation duct 9 is fixedly connected to the air outlet pipe 13. The inlet pipe 10 passes through the air inlet pipe 12, and the outlet pipe 11 passes through the air inlet and outlet pipes 13. Exhaust gas enters the heat insulation duct 9 from the air inlet pipe 12 and then leaves from the air outlet pipe 13. A central column is fixedly connected between the two manifold valves 8. 14. Six inner positioning strips 15 are fixed to the outer wall of the central column 14, and six outer fixing strips 16 are fixed to the inner wall of the heat insulation air duct 9. The inner positioning strips 15 and the outer fixing strips 16 are used to position each spiral tube ceramic membrane and reduce the gap between each channel. The inner positioning strips 15 and the outer fixing strips 16 are both set between the two manifold valves 8, and the inner positioning strips 15 are all attached to the upper inner reverse spiral tube ceramic membrane 1, the middle inner positive spiral tube ceramic membrane 2 and the lower inner reverse spiral tube ceramic membrane 3. The outer fixing strips 16 are all attached to the upper outer reverse spiral tube ceramic membrane 4, the middle outer positive spiral tube ceramic membrane 5 and the lower outer reverse spiral tube ceramic membrane 6.

[0028] During use, exhaust gas enters the heat-insulating duct 9 through the intake pipe 12 and then sequentially flows through six channels separated by the upper inner reverse spiral tube ceramic membrane 1 and the upper outer reverse spiral tube ceramic membrane 4, the middle inner positive spiral tube ceramic membrane 2 and the middle outer positive spiral tube ceramic membrane 5, and the lower inner reverse spiral tube ceramic membrane 3 and the lower outer reverse spiral tube ceramic membrane 6. The flow proceeds from top to bottom, rotating counterclockwise, clockwise, and then twice counterclockwise. The spiral channels and the tubular shape of the ceramic membranes increase the contact area between the exhaust gas and the metal-based porous ceramic composite membrane. Furthermore, the two changes in direction within the spiral channels disrupt the inertial airflow stability caused by the change in direction, allowing the exhaust gas and water vapor at the center of the channel to exchange positions with those on the outer layer. This ensures that the water vapor can contact the composite membrane evenly and efficiently. Simultaneously, cooling water entering the liquid inlet pipe 10 flows through... The upper manifold valve 8 diverts the flow to the metal foam filler 7 within the six upper inner reverse spiral ceramic membranes 1 and the six upper outer reverse spiral ceramic membranes 4, and finally merges the flow through the lower manifold valve 8 and flows out of the heat insulation duct 9 through the liquid outlet pipe 11. The exhaust gas leaves the heat insulation duct 9 through the exhaust pipe 13. During this process, water vapor is absorbed by the cooling water after contacting each spiral ceramic membrane. After the water vapor condenses into droplets, it flows into the interior of each spiral ceramic membrane due to capillary action and merges with the cooling water flowing in the metal foam filler 7 to complete the wet heat recovery. The cooling water cannot seep out of the spiral ceramic membrane due to its own surface tension. The metal foam filler 7, due to its strong thermal conductivity and large porosity, can not only enhance the heat exchange capacity of the spiral ceramic membrane, but also serve as a supporting skeleton for the spiral ceramic membrane. In addition, the inner positioning strip 15 and the outer fixing strip 16 are used to position each spiral ceramic membrane and reduce the gap between each channel.

[0029] Through the above steps, by setting up mutually bonded reverse spiral tube ceramic membranes and positive spiral tube ceramic membranes, after the exhaust gas enters the heat-insulating duct 9, it will sequentially pass through six channels separated by mutually bonded upper inner reverse spiral tube ceramic membrane 1 and upper outer reverse spiral tube ceramic membrane 4, channels separated by mutually bonded middle inner positive spiral tube ceramic membrane 2 and middle outer positive spiral tube ceramic membrane 5, and channels separated by mutually bonded lower inner reverse spiral tube ceramic membrane 3 and lower outer reverse spiral tube ceramic membrane 6, from top to bottom, rotating downwards in a counterclockwise direction, rotating downwards in a clockwise direction, and then rotating downwards twice in a counterclockwise direction. As the spiral descends, the spiral channel and the tubular shape of the ceramic membrane increase the contact area between the exhaust gas and the metal-based porous ceramic composite membrane. The two changes in direction of the spiral channel also allow the air inside the channel to disrupt the stable airflow caused by inertia through impact during the change of direction. This allows the exhaust gas and water vapor at the center of the channel to exchange positions with the exhaust gas and water vapor on the outer layer, so that the water vapor can contact the composite membrane evenly and efficiently. This reduces the density of the composite membrane arrangement in the metal-based porous ceramic composite membrane heat and humidity recovery device, thereby reducing the resistance encountered by the exhaust gas and improving the exhaust gas passage efficiency.

Claims

1. A porous ceramic membrane heat and moisture recovery device filled with metal foam, comprising an insulated air duct (9); characterized in that: It also includes six upper outer reverse spiral tube ceramic membranes (4), and six upper outer reverse spiral tube ceramic membranes (4) arranged in a circular array are provided on the inner side of the heat insulation duct (9). The lower ends of the upper outer reverse spiral tube ceramic membranes (4) are all fixed with middle outer positive spiral tube ceramic membranes (5), and the lower ends of the middle outer positive spiral tube ceramic membranes (5) are all fixed with lower outer reverse spiral tube ceramic membranes (6). The inner side of the upper outer reverse spiral tube ceramic membranes (4) is provided with six upper inner reverse spiral tube ceramic membranes (1) arranged in a circular array. The lower ends of the upper inner reverse spiral tube ceramic membranes (1) are all fixed with... The inner positive spiral tube ceramic membrane (2) and the lower end of the inner positive spiral tube ceramic membrane (2) are both fixedly connected to the lower inner reverse spiral tube ceramic membrane (3). The upper end of the inner side of the heat insulation air duct (9) and the lower end of the inner side of the heat insulation air duct (9) are both fixedly connected to the manifold valve (8). The inner sides of the upper inner reverse spiral tube ceramic membrane (1), the inner positive spiral tube ceramic membrane (2), the lower inner reverse spiral tube ceramic membrane (3), the upper outer reverse spiral tube ceramic membrane (4), the inner outer positive spiral tube ceramic membrane (5) and the lower outer reverse spiral tube ceramic membrane (6) are all filled with metal foam filler (7).

2. The porous ceramic membrane heat and humidity recovery device filled with metal foam according to claim 1, characterized in that: The lower end face of the manifold valve (8) located at the upper end is fixedly connected and connected to the upper end face of the six upper inner reverse spiral tube ceramic membranes (1) and the six upper outer reverse spiral tube ceramic membranes (4), and the upper end face of the manifold valve (8) located at the lower end is fixedly connected and connected to the lower end face of the six lower inner reverse spiral tube ceramic membranes (3) and the six lower outer reverse spiral tube ceramic membranes (6).

3. The porous ceramic membrane heat and humidity recovery device filled with metal foam according to claim 1, characterized in that: The upper inner reverse spiral tube ceramic membrane (1), the lower inner reverse spiral tube ceramic membrane (3), the upper outer reverse spiral tube ceramic membrane (4) and the lower outer reverse spiral tube ceramic membrane (6) are all tubular with a counterclockwise spiral half turn. The middle inner positive spiral tube ceramic membrane (2) and the middle outer positive spiral tube ceramic membrane (5) are both tubular with a clockwise spiral half turn.

4. The porous ceramic membrane heat and humidity recovery device filled with metal foam according to claim 1, characterized in that: The two adjacent upper inner reverse spiral tube ceramic membranes (1) and upper outer reverse spiral tube ceramic membranes (4), the two adjacent middle inner positive spiral tube ceramic membranes (2) and middle outer positive spiral tube ceramic membranes (5), and the two adjacent lower inner reverse spiral tube ceramic membranes (3) and lower outer reverse spiral tube ceramic membranes (6) are all designed to be bonded to each other.

5. The porous ceramic membrane heat and humidity recovery device filled with metal foam according to claim 2, characterized in that: The upper end face of the manifold valve (8) located at the upper end is fixedly connected to and connected to the inlet pipe (10), and the lower end face of the manifold valve (8) located at the lower end is fixedly connected to and connected to the outlet pipe (11).

6. The porous ceramic membrane heat and humidity recovery device filled with metal foam according to claim 5, characterized in that: An air inlet pipe (12) is fixedly connected to the upper end of the heat insulation air duct (9), and an air outlet pipe (13) is fixedly connected to the lower end of the heat insulation air duct (9). The liquid inlet pipe (10) passes through the air inlet pipe (12), and the liquid outlet pipe (11) passes through the air inlet and outlet pipes (13).

7. The porous ceramic membrane heat and humidity recovery device filled with metal foam according to claim 5, characterized in that: A central column (14) is fixedly connected to the middle of the two manifold valves (8). Six inner positioning strips (15) are fixedly connected to the outer wall of the central column (14), and six outer fixing strips (16) are fixedly connected to the inner wall of the heat insulation air duct (9).

8. The porous ceramic membrane heat and humidity recovery device filled with metal foam according to claim 7, characterized in that: The inner positioning strip (15) and the outer fixing strip (16) are both located between the two manifold valves (8). The inner positioning strip (15) is attached to the upper inner reverse spiral tube ceramic membrane (1), the middle inner positive spiral tube ceramic membrane (2) and the lower inner reverse spiral tube ceramic membrane (3). The outer fixing strip (16) is attached to the upper outer reverse spiral tube ceramic membrane (4), the middle outer positive spiral tube ceramic membrane (5) and the lower outer reverse spiral tube ceramic membrane (6).

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