Tubular compressed gas membrane dryer

Abstract

The utility model provides a tubular compressed gas membrane dryer which is at least provided with a dryer body, a moisture permeable membrane set is arranged in the dryer body, end covers are arranged at the two ends of the dryer body, and an air inlet cavity and an air outlet cavity are formed between the end covers at the two ends and the dryer body respectively. The air inlet cavity and the air outlet cavity are communicated with the interior of the dryer body; the two ends, close to the air inlet cavity and the air outlet cavity, of the moisture-permeable membrane set are provided with pouring sealant layers, so that the internal space of a tube bundle of the moisture-permeable membrane set and the end covers form a flow field space of dried air, and the external of the tube bundle of the moisture-permeable membrane set and the dryer body form a blowing air space. And the flow field space and the purge gas space are independent from each other and are free of blow-by. The structure is simple, the size is small, the drying depth of the to-be-dried gas is effectively increased, and the drying degree of the dried gas can be adjusted.

Description

Technical Field

[0001] The present application relates to the technical field of compressed air filtration, and in particular to a tubular compressed gas membrane dryer. Background Art

[0002] Compressed air is used in various aspects of the industrial field as an important production power. In the production process of compressed air, moisture in the air will enter the compressed air system along with the compressed air. The moisture in the compressed air will cause corrosion of the compressed air pipeline and promote the growth of microorganisms; if the moisture is not removed, the condensate formed will accumulate at the low point of the system, which will pose a long-term potential threat to industrial production.

[0003] The traditional dryer structure includes a dryer body, a moisture permeable membrane tube installed in the dryer body, and a purge gas inlet and outlet arranged on the outer shell. The dryer transfers the concentration difference between the gas to be dried and the water vapor in the purge gas through the internal moisture permeable membrane tube. The existing dryer usually adjusts the drying capacity of the dryer by adjusting the number of tube bundles of the moisture permeable membrane tube. However, if the tube bundles are dense, the purge gas will not be able to flow into the internal tube bundles for water vapor exchange. If the tube bundles are sparse, the gas to be dried that actually participates in the water vapor exchange is small, and the drying efficiency is low. Utility Model Content

[0004] The present application provides a tubular compressed gas membrane dryer, which effectively improves the drying depth of a gas source and achieves adjustable drying degree of the dry gas.

[0005] The present application provides a tubular compressed gas membrane dryer, which at least has a dryer body, wherein a moisture permeable membrane group is arranged inside the dryer body to exchange and isolate the humidity between the dried gas and the purge gas, and end covers are arranged at both ends of the dryer body, and an air inlet cavity and an air outlet cavity are respectively formed between the end covers at both ends and the dryer body, and the air inlet cavity and the air outlet cavity are connected with the interior of the dryer body, and the dry gas to be dried enters from the air inlet cavity, passes through the dryer body and the moisture permeable membrane group inside, and then is discharged through the air outlet cavity;

[0006] The moisture permeable membrane group is provided with a potting glue layer at both ends close to the air inlet cavity and the air outlet cavity, so that the internal space of the tube bundle of the moisture permeable membrane group together with the end cover forms a flow field space for the dried gas, and the outside of the tube bundle of the moisture permeable membrane group together with the dryer body forms a purge gas space, and the flow field space and the purge gas space are independent of each other and do not mix with each other.

[0007] As a further explanation, in the dryer body, the cross-sectional area of ​​the flow field space is larger than the cross-sectional area of ​​the purge gas space, so that the gas flow rate in the flow field space is smaller than the gas flow rate in the purge gas space.

[0008] As a further explanation, a purge gas outlet is provided on one side of the air inlet cavity of the dryer body, and a dew point adjustment structure is provided on the dryer body outside the purge gas outlet to shield the purge gas outlet.

[0009] For further explanation, the dew point adjustment structure is sleeved on the outside of the dryer body, partially or completely covering the purge gas outlet, so as to adjust the purge gas flow rate to obtain dry gas with different dryness levels.

[0010] Further explanation, a step structure is provided on the dryer body on one side of the air outlet cavity, and an expansion and decompression structure is provided on the step structure. The expansion and decompression structure has at least a conical hole structure, and the conical hole structure connects the air outlet cavity and the purge gas space, so that the gas enters the purge gas space through the conical hole structure part to deeply dry the gas in the dryer body.

[0011] To further explain, the conical hole structure has one or more conical hole structures, and the multiple conical hole structures are divergently arranged and interconnected.

[0012] As a further explanation, the flow direction of the gas in the flow field space within the dryer body is opposite to the flow direction of the gas in the purge gas space.

[0013] As a further explanation, a sealing structure is provided between the end cover and the dryer body to ensure the sealing inside the dryer.

[0014] By implementing the above tubular compressed gas membrane dryer, the following technical effects are achieved:

[0015] The present application sets an expansion and decompression structure, so that after the high-pressure intake air flows through the interior of the moisture permeable membrane group and reaches the air outlet cavity, part of the high-pressure gas enters the purge gas space flow field through the expansion and decompression structure, and the gas after expansion and decompression enters the narrow purge gas space flow field to fully purge the outside of the moisture permeable membrane group at a higher flow rate to accelerate the removal of moisture on the outside of the membrane, forming a steam partial pressure difference between the inside and outside of the membrane, thereby achieving deep drying of the gas source.

[0016] The present application provides an adjusting device at the purge gas outlet that can adjust and cover the outlet, which can effectively adjust the purge gas flow rate to obtain dry gas with different dryness levels.

[0017] This application does not need to adjust the number of tube bundles of the moisture permeable membrane group, and can achieve a small size and has the advantage of being easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 It is a schematic diagram of the internal structure of the tubular compressed gas membrane dryer structure provided in the embodiment of the present application;

[0020] Figure 2 yes Figure 1 Schematic diagram of the structure of a tubular compressed gas membrane dryer;

[0021] Figure 3 It is a schematic diagram of the structure of the moisture permeable membrane group and the potting glue layer provided in the embodiment of the present application;

[0022] Figure 4 It is a schematic diagram of the structure of the dryer body provided in the embodiment of the present application;

[0023] Wherein, the accompanying drawings are marked as follows:

[0024] 1-membrane dryer; 10-dryer body, 100-purge gas outlet, 11-first end cover, 110-air inlet cavity, 111-air inlet, 12-second end cover, 120-air outlet cavity, 121-air outlet, 13-moisture permeable membrane group, 130-moisture permeable membrane tube, 14-potting glue layer, 15-dew point adjustment structure, 16-expansion decompression structure. DETAILED DESCRIPTION

[0025] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature include the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", and "set" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0029] The present application provides a tubular compressed gas membrane dryer, which is described in detail below.

[0030] See also Figure 1-Figure 4A tubular compressed gas membrane dryer 1 at least comprises a dryer body 10, wherein a moisture permeable membrane group 13 is arranged inside the dryer body 10 for humidity exchange and isolation between the dried gas and the purge gas, and a first end cover 11 and a second end cover 12 are respectively arranged at both ends of the dryer body 10, and the first end cover 11 and the second end cover 12 can be connected to the dryer body 10 by any of the methods such as combining a thread and a sealing ring, combining a screw and a sealing ring, welding, or bonding. It should be noted that no matter which connection method is used, the first end cover 11 and the second end cover 12 always maintain sealing properties with the dryer body 10. An air inlet cavity 110 is formed between the first end cover 11 and the dryer body 10, and an air outlet cavity 120 is formed between the second end cover 12 and the dryer body 10. The air inlet cavity 110 and the air outlet cavity 120 are connected to the interior of the dryer body 10. An air inlet 111 is provided on one side of the first end cover 11. After the dry gas enters the air inlet cavity 110 from the air inlet 111, it passes through the dryer body 10 and the internal moisture permeable membrane group 13 to be dried. An air outlet 121 is provided on one side of the second end cover 12. After the dried gas passes through the air outlet cavity 120, it is discharged through the air outlet 121.

[0031] The moisture permeable membrane group 13 located in the dryer body 10 is composed of a plurality of moisture permeable membrane tubes 130. The moisture permeable membrane tubes 130 are hollow fiber moisture permeable membrane tubes, which have gas barrier properties and water selective permeability. The two ends of the moisture permeable membrane tubes 130 near the air inlet cavity 110 and the air outlet cavity 120 are provided with a potting glue layer 14, so that the internal space of the moisture permeable membrane tubes 130 of the moisture permeable membrane group 13 together with the first end cap 11 and the second end cap 12 form a flow field space A for the dried gas, and the outside of the moisture permeable membrane tubes 130 of the moisture permeable membrane group 13 together with the dryer body 10 form a purge gas space B, and the flow field space A and the purge gas space B are independent of each other and do not cross gas.

[0032] It should be noted that the cross-sectional area of ​​the flow field space A of the dried gas in the dryer body 10 is larger than the cross-sectional area of ​​the purge gas space B, so that the gas flow rate in the flow field space A of the dried gas is smaller than the gas flow rate in the purge gas space B. And the gas flow direction in the flow field space A of the dried gas in the dryer body 10 is opposite to the gas flow direction in the purge gas space B.

[0033] A step structure is provided on the dryer body 10 on one side of the outlet cavity 120, and an expansion and decompression structure 16 is provided on the step structure. The expansion and decompression structure 16 has at least a conical hole structure, and one or more conical hole structures can be provided. The multiple conical hole structures are divergently provided and interconnected. The large opening tail end 160 of the conical hole structure is partially oriented toward the purge gas space B, so that after the gas to be dried flows through the inside of the moisture permeable membrane group 13 and reaches the outlet cavity 120, part of the high-pressure gas enters the purge gas space B flow field through the expansion and decompression structure 16 provided, and the gas after expansion and decompression enters the narrow purge gas space B flow field to fully purge the outside of the moisture permeable membrane group 13 at a higher flow rate, accelerates the removal of moisture on the outside of the membrane, forms a steam partial pressure difference between the inside and outside of the membrane, and thus achieves deep drying of the gas source.

[0034] The dryer body 10 is provided with a purge gas outlet 100 on one side of the air inlet cavity. The purge gas outlet 100 is usually set as evenly distributed openings. A dew point adjustment structure 15 is provided on the outer dryer body 10 to cover the purge gas outlet 100. The dew point adjustment structure 15 is sleeved on the outer side of the dryer body 10, partially or completely covering the purge gas outlet 100, so as to adjust the purge gas flow rate to obtain dry gas with different dryness levels.

[0035] The basic concepts have been described above. Obviously, for those skilled in the art, the above detailed disclosure is only for example and does not constitute a limitation of the present application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements and amendments to the present application. Such modifications, improvements and amendments are suggested in the present application, so such modifications, improvements and amendments still belong to the spirit and scope of the exemplary embodiments of the present application.

[0036] Similarly, it should be noted that in order to simplify the description of the disclosure of this application and thus help understand one or more utility model embodiments, in the above description of the embodiments of this application, multiple features are sometimes combined into one embodiment, drawing or description thereof. However, this disclosure method does not mean that the features required by the object of this application are more than the features mentioned in the claims. In fact, the features of the embodiments are less than all the features of the single embodiment disclosed above.

[0037] The above is a detailed introduction to a tubular compressed gas membrane dryer provided in an embodiment of the present application. Specific examples are used in this article to illustrate the principle and implementation method of the present utility model. The description of the above embodiments is only used to help understand the method and core idea of ​​the present utility model; at the same time, for technical personnel in this field, according to the idea of ​​the present utility model, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present utility model.

Claims

1. A tubular compressed gas membrane dryer, characterized in that: At least a dryer body is provided, a moisture permeable membrane group is arranged inside the dryer body, humidity exchange and isolation between the dried gas and the purge gas are carried out, end covers are arranged at both ends of the dryer body, an air inlet cavity and an air outlet cavity are respectively formed between the end covers at both ends and the dryer body, the air inlet cavity and the air outlet cavity are connected with the interior of the dryer body, and the dry gas to be dried enters from the air inlet cavity, passes through the dryer body and the moisture permeable membrane group inside, and then is discharged through the air outlet cavity; The moisture permeable membrane group is provided with a potting glue layer at both ends close to the air inlet cavity and the air outlet cavity, so that the internal space of the tube bundle of the moisture permeable membrane group together with the end cover forms a flow field space for the dried gas, and the outside of the tube bundle of the moisture permeable membrane group together with the dryer body forms a purge gas space, and the flow field space and the purge gas space are independent of each other and do not mix with each other.

2. The tubular compressed gas membrane dryer according to claim 1, characterized in that: In the dryer body, the cross-sectional area of ​​the flow field space is larger than the cross-sectional area of ​​the purge gas space, so that the gas flow rate in the flow field space is smaller than the gas flow rate in the purge gas space.

3. The tubular compressed gas membrane dryer according to claim 1, characterized in that: The dryer body is provided with a purge gas outlet on one side of the air inlet cavity, and a dew point adjustment structure is provided on the dryer body outside the purge gas outlet to shield the purge gas outlet.

4. The tubular compressed gas membrane dryer according to claim 3, characterized in that: The dew point adjustment structure is sleeved on the outside of the dryer body, partially or completely covering the purge gas outlet, so as to adjust the purge gas flow rate to obtain dry gas with different dryness degrees.

5. The tubular compressed gas membrane dryer according to claim 1, characterized in that: A step structure is provided on the dryer body on one side of the air outlet cavity, and an expansion and decompression structure is provided on the step structure. The expansion and decompression structure has at least a conical hole structure, and the conical hole structure connects the air outlet cavity and the purge gas space, so that the gas passes through the conical hole structure part and enters the purge gas space to deeply dry the gas in the dryer body.

6. The tubular compressed gas membrane dryer according to claim 5, characterized in that: The tapered hole structure has one or more tapered hole structures, and the multiple tapered hole structures are divergently arranged and interconnected.

7. The tubular compressed gas membrane dryer according to claim 1, characterized in that: The flow direction of the gas in the flow field space in the dryer body is opposite to the flow direction of the gas in the purge gas space.

8. The tubular compressed gas membrane dryer according to claim 1, characterized in that: A sealing structure is provided between the end cover and the dryer body to ensure the sealing performance inside the dryer.

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