Multi-effect membrane reactor

Abstract

The utility model discloses a multi-effect membrane reactor which comprises a plurality of breathable membranes, the breathable membranes are sequentially arranged, an absorbent circulation cavity or an air channel is formed between every two adjacent breathable membranes, and the absorbent circulation cavities and the air channels are alternately arranged; each absorbent circulation cavity comprises a liquid injection port and a liquid discharge port, at least two types of absorbents are introduced from the liquid injection port and are discharged from the liquid discharge port, and the absorbents introduced into each absorbent circulation cavity are not completely the same. According to the scheme, during structural design, in the same membrane reactor, different absorbents are injected into different absorbent circulation cavities through different liquid injection ports, so that the same membrane reactor can absorb various greenhouse gases at the same time, the integrated design of a plurality of membrane reactors when various gases need to be absorbed is realized, and the integrated design of the membrane reactors is realized. The material requirement of common configuration is reduced, and the overall cost is effectively reduced.

Description

Technical Field

[0001] This utility model belongs to the field of membrane reactor technology, and in particular relates to a multi-effect membrane reactor. Background Technology

[0002] The greenhouse effect, caused by the greenhouse gas phenomenon, is a significant global environmental problem. Internationally, greenhouse gases are generally considered to be carbon dioxide, water vapor, nitrous oxide, hydrofluorocarbons, methane, and other gases that absorb long-wave solar radiation. Increases in these gases in the atmosphere lead to glacial melting, rising sea levels, changes in atmospheric circulation, and more frequent extreme weather events.

[0003] Using membrane reactors to collect and extract greenhouse gases is a common method. Its working principle is based on the coupling of the selective permeability of the membrane material and the reaction process. Carbon dioxide reacts with a chemical absorbent loaded inside or on the membrane to form stable compounds, which are then desorbed and recovered through heating or depressurization. Currently, the main type of membrane reactor on the market is the hollow fiber membrane contact reactor. By circulating absorbent between two membrane layers and placing it in a natural environment, it can absorb carbon dioxide from the atmosphere.

[0004] Existing membrane reactors often only absorb and recover carbon dioxide gas. For other greenhouse gases, separate gas absorption equipment is required, which increases production and land costs. Therefore, it is necessary to design an integrated membrane reactor that can absorb multiple greenhouse gases. Utility Model Content

[0005] The purpose of this invention is to provide a multi-effect membrane reactor to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a multi-effect membrane reactor, comprising a plurality of permeable membranes, wherein the plurality of permeable membranes are arranged sequentially, and an absorbent flow chamber or air channel is formed between two adjacent permeable membranes, wherein the absorbent flow chamber and the air channel are alternately arranged;

[0007] The absorbent flow chamber includes an injection port and an outlet port. The absorbent enters through the injection port and exits through the outlet port. The absorbent includes at least two types, and the absorbents entering each absorbent flow chamber are not exactly the same.

[0008] Preferably, it also includes a lean solution tank and a rich solution tank. The lean solution tank and the rich solution tank are respectively provided with a storage chamber 1 and a storage chamber 2 with the same number of absorbent types. Each injection port is connected to a storage chamber 1 and each discharge port is connected to a storage chamber 2.

[0009] Preferably, a heat exchange assembly is provided in the absorbent flow chamber. The heat exchange assembly includes a gas / liquid channel placed in each absorbent flow chamber. Both ends of the gas / liquid channel extend out of the absorbent channel. The input ends of all the gas / liquid channels are connected to a common injection channel, and the output ends of all the gas / liquid channels are connected to a common discharge channel.

[0010] Preferably, the gas / liquid flow channel is configured through the storage chamber of the lean liquid tank and / or the rich liquid tank.

[0011] Preferably, a support plate is provided between the lean solution tank and the rich solution tank, and the breathable membrane is connected to the support plate so that the support plate forms the two walls of the absorbent flow cavity.

[0012] Preferably, a skeleton layer is provided between the two breathable membranes forming the air channel, and the two breathable membranes are attached to both sides of the skeleton layer. The tensile and compressive strengths of the skeleton layer are greater than the tensile and compressive strengths of the breathable layer.

[0013] Preferably, the breathable membrane is made of PTFE material, and the skeleton layer is made of PET material.

[0014] Preferably, the lean solution tank and the rich solution tank are made of materials with pressure resistance.

[0015] The beneficial effects of this utility model are as follows: In the structural design of this solution, different absorbents are injected into different absorbent flow chambers through different injection ports in the same membrane reactor, so that the same membrane reactor can simultaneously complete the multi-effect of absorbing multiple greenhouse gases. This realizes the integrated design of multiple membrane reactors when multiple gases need to be absorbed, reduces the material requirements of shared configurations, and effectively reduces the overall cost.

[0016] Since the compounds formed after the absorbent absorbs the response gas become unstable when the temperature of the absorbent increases, the total amount of gas that it can absorb will also decrease. Therefore, by setting up a heat exchange component, the chemical heat generated by the reaction of the absorbent in the absorbent flow chamber can be effectively absorbed, thereby ensuring the absorption effect of the absorbent. Furthermore, the gas / liquid flow channel passing through the storage chamber of the lean liquid tank and / or the rich liquid tank is also an effective measure to further ensure the temperature state of the absorbent and reduce the influence of the ambient temperature on the absorbent.

[0017] By setting up a skeleton layer, the service life of the membrane reactor can be effectively extended. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the membrane reactor according to Embodiment 1 of this utility model;

[0019] Figure 2This is an exploded view of a membrane reactor according to an embodiment of this utility model;

[0020] Figure 3 This is a schematic diagram of the overall structure of the membrane reactor and heat exchange assembly in Embodiment 1 of this utility model;

[0021] Figure 4 This is a schematic diagram showing the connection and positional relationship between the membrane reactor and the heat exchange assembly in Embodiment 1 of this utility model;

[0022] Figure 5 This is a schematic diagram of the heat exchange component in Embodiment 1 of this utility model;

[0023] Figure 6 This is a schematic diagram of the structure of the membrane reactor in embodiment two of this utility model;

[0024] Figure 7 This is an exploded view of the membrane reactor of embodiment two of this utility model;

[0025] Figure 8 This is a schematic diagram of the internal structure of the lean liquid tank or the rich liquid tank in Embodiment 2 of this utility model;

[0026] Figure 9 This is a schematic diagram showing the connection and positional relationship between the membrane reactor and the heat exchange assembly in Embodiment 2 of this utility model;

[0027] Figure 10 This is a schematic diagram of the structure of the heat exchange assembly in Embodiment 2 of this utility model;

[0028] Figure 11 This is a cross-sectional view of the connection relationship between the breathable membrane and the skeleton layer in Embodiment 2 of this utility model;

[0029] In the diagram: 1. Breathable membrane; 2. Absorbent flow chamber; 3. Air channel; 4. Sealing connection plate one; 41. Connecting long strip groove one; 5. Injection port; 6. Sealing connection plate two; 61. Connecting long strip groove two; 7. Drain port; 8. Lean liquid tank; 81. Storage chamber one; 9. Rich liquid tank; 91. Storage chamber two; 10. Support plate; 11. Gas / liquid flow channel; 12. Main injection channel; 13. Main discharge channel; 14. Skeleton layer. Detailed Implementation

[0030] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more definite definition of the scope of protection of the present invention. Example

[0031] See Figure 1 , Figure 2A multi-effect membrane reactor includes several permeable membranes 1, which are arranged sequentially, and an absorbent flow chamber 2 or an air channel 3 is formed between two adjacent permeable membranes 1, with the absorbent flow chamber 2 and the air channel 3 being arranged alternately.

[0032] The absorbent flow chamber 2 includes an injection port 5 and an outlet port 7. The absorbent is introduced through the injection port 5 and discharged through the outlet port 7. The absorbent includes at least two types, and the absorbent introduced into each absorbent flow chamber 2 is not exactly the same. The breathable membrane 1 can be made of PTFE material.

[0033] The system also includes a lean solution tank 8 and a rich solution tank 9. The lean solution tank 8 and the rich solution tank 9 are respectively provided with a first liquid storage chamber 81 and a second liquid storage chamber 91, which are the same number as the types of absorbents. Each injection port 5 is connected to a first liquid storage chamber 81, and each drainage port 7 is connected to a second liquid storage chamber 91. Only one type of absorbent flows through each first liquid storage chamber and the second liquid storage chamber. The lean solution tank and the rich solution tank are made of materials with pressure resistance, such as UPVC. The advantage of this design is that the lean solution tank can be pressurized to apply pressure to the breathable membrane, so that the blockage caused by long-term use can be cleared. It should be noted that the lean solution tank and the rich solution tank are only the manifestation of this embodiment. Replacing the lean solution tank and the rich solution tank with pipes or other non-technical alternatives should also fall within the protection scope of this application.

[0034] See Figure 3 , Figure 4 , Figure 5 The absorbent flow chamber 2 is provided with a heat exchange assembly, which includes a gas / liquid channel 11 placed in each absorbent flow chamber 2. Both ends of the gas / liquid channel 11 extend out of the absorbent channel. The input ends of all the gas / liquid channels 11 are connected to an injection main channel 12, and the output ends of all the gas / liquid channels 11 are connected to a discharge main channel 13.

[0035] The gas / liquid flow channel 11 is provided through the storage chamber 81 or storage chamber 91 of the lean liquid tank 8 and / or the rich liquid tank 9.

[0036] A support plate 10 is provided between the lean solution tank 8 and the rich solution tank 9, and the breathable membrane 1 is connected to the support plate 10 so that the support plate 10 forms the two walls of the absorbent flow cavity 2.

[0037] Specifically, in this embodiment, the breathable membrane 1 is vertically arranged. Sealing connecting plate 4 and sealing connecting plate 6 are respectively provided on the top and bottom sides of the breathable membrane 1. The sealing connecting plate 4 has a number of connecting grooves 41 equal to the number of breathable membranes 1, and the sealing connecting plate 6 has a number of connecting grooves 61 equal to the number of breathable membranes 1. All the top and bottom edges of the breathable membranes 1 are fixed within the connecting grooves 41 and 61, and can be fixed and sealed with resin. The injection port 5 is located on the sealing connecting plate 4, and the drainage port 7 is located on the sealing connecting plate 6; both can be in the form of a pipe head. Several liquid storage chambers 81 have openings communicating with the injection ports 5, and several liquid storage chambers 91 have openings communicating with the drainage ports 7. Similarly, all openings can be connected and sealed with resin.

[0038] In this embodiment, the number of support plates 10 is twice the number of absorbent flow chambers 2 and they are respectively vertically arranged on both sides of the length direction of the breathable membrane 1. The breathable membrane 1 can be inserted into the long groove and fixedly connected with resin by opening a long groove on the support plate 10. Example

[0039] See Figure 6-11 Unlike Embodiment 1, in this embodiment, a skeleton layer 14 is provided between the two breathable membranes 1 forming the air channel 3, and the two breathable membranes 1 are attached to both sides of the skeleton layer 14. The tensile and compressive strengths of the skeleton layer 14 are greater than the tensile and compressive strengths of the breathable layer. The skeleton layer is hollow to facilitate the entry of air. The breathable membranes 1 can be made of PTFE material, and the skeleton layer 14 can be made of PET material.

[0040] In this embodiment, the support plate 10 consists of two plates horizontally positioned on the upper and lower sides of the breathable membrane 1. The lean liquid tank 8 is positioned on the upper support plate 10, and an injection port 5 is provided on the support plate 10 to connect the lean liquid tank 8 and the absorbent flow chamber 2. The rich liquid tank 9 is positioned below the lower support plate 10, and a drain port 7 is provided on the lower support plate 10 to connect the rich liquid tank 9 and the absorbent flow chamber 2.

[0041] In this embodiment, sealing connection plate 4 and sealing connection plate 6 are respectively placed on both sides along the entire length of the breathable membrane 1. The sealing connection plate 4 and sealing connection plate 6 are also provided with connecting long groove 41 and connecting long groove 61 that pass through themselves. Unlike embodiment 1, in this embodiment, air enters from both sides of the product from the skeleton layer 14.

[0042] Working principle and process:

[0043] When using the product of this solution, different absorbents are injected into different storage chambers 81 to achieve the presence of different absorbents in different absorbent flow chambers 2. The absorbent in the lean liquid tank reacts with the gas passing through the permeable membrane after flowing through the absorbent flow chamber. The absorbent after absorbing the gas flows into the rich liquid tank. This process achieves the absorption of different components of gases in the air. Specifically, the absorbent can be an alcohol amine solution or a calcium chloride solution to achieve the absorption of carbon dioxide and water vapor. It should be noted that this solution is described using the absorption of greenhouse gases as an example. In actual use, this product can also absorb other mixed gases. That is, the application of this solution in other usage environments should also fall within the protection scope of this solution.

[0044] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A multiple effect membrane reactor characterized by: The air-permeable film (1) comprises a plurality of air-permeable films (1) arranged in sequence, and an absorbent flow cavity (2) or an air passage (3) is formed between two adjacent air-permeable films (1), and the absorbent flow cavity (2) and the air passage (3) are arranged alternately. The absorbent flow cavity (2) comprises a liquid injection port (5) and a liquid discharge port (7), and the absorbent is injected from the liquid injection port (5) and discharged through the liquid discharge port (7), wherein the absorbent comprises at least two kinds, and the absorbent injected into each absorbent flow cavity (2) is not completely the same.

2. A multiple effect membrane reactor according to claim 1, characterized in that: The liquid tank (8) and the liquid tank (9) are provided with a liquid storage cavity one (81) and a liquid storage cavity two (91) respectively, each liquid injection port (5) is connected with a liquid storage cavity one (81), each liquid discharge port (7) is connected with a liquid storage cavity two (91), and each liquid storage cavity one and liquid storage cavity two only flow one kind of absorbent.

3. A multiple effect membrane reactor according to claim 2, wherein: The heat exchange assembly is arranged in the absorbent flow cavity (2), and the heat exchange assembly comprises a gas / liquid flow channel (11) arranged in each absorbent flow cavity (2), both ends of the gas / liquid flow channel (11) extend out of the absorbent passage, the input ends of all the gas / liquid flow channels (11) are connected to an injection total passage (12) in common, and the output ends of all the gas / liquid flow channels (11) are connected to a discharge total passage (13) in common.

4. A multiple effect membrane reactor according to claim 3, wherein: The gas / liquid flow channel (11) passes through the liquid storage cavity one (81) or the liquid storage cavity two (91) of the liquid tank (8) and / or the liquid tank (9).

5. A multiple effect membrane reactor according to claim 2, wherein: The support plate (10) is arranged between the liquid tank (8) and the liquid tank (9), and the air-permeable film (1) is connected with the support plate (10) to form two walls of the absorbent flow cavity (2).

6. A multiple effect membrane reactor according to claim 1, wherein: The skeleton layer (14) is arranged between the two air-permeable films (1) forming the air passage (3), and the two air-permeable films (1) are attached to the two sides of the skeleton layer (14), and the tensile and compressive strength of the skeleton layer (14) is greater than that of the air-permeable layer.

7. A multiple effect membrane reactor according to claim 6, wherein: The skeleton layer is in a hollow shape.

8. A multiple effect membrane reactor according to claim 6, wherein: The air-permeable film (1) is made of PTFE material, and the skeleton layer (14) is made of PET material.

9. A multiple effect membrane reactor according to claim 2, wherein: The liquid tank and the liquid tank have compression resistance.

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