A plate-type special gas membrane dryer

Abstract

The present application provides a plate-type special gas membrane dryer, which at least comprises an end plate and a closing plate, wherein the end plate and the closing plate are arranged opposite to each other, and a gas source inlet, a dry gas outlet, a purge gas inlet and a purge gas outlet are arranged on the end plate, and connectors connected to an external gas pipeline are arranged at the gas source inlet, the dry gas outlet and the purge gas inlet, and a regulating valve is arranged at the purge gas outlet; at least one group of unit membrane groups is arranged between the end plate and the closing plate, and the unit membrane group is used to dry the gas entering through the gas source inlet and discharge the dried gas through the dry gas outlet; the present application adopts a plate-type structure, which has a small volume and high pressure difference resistance; the purge gas consumption is small and the drying degree is high; the purge gas medium is a high-pressure gas different from the dry gas medium, and the high-pressure characteristics of the compressed gas are effectively used to achieve the decompression, expansion and acceleration of the purge space flow field, thereby improving the water removal efficiency of the purge gas, and the installation is convenient and the application range is wide.

Description

Technical Field

[0001] The present application relates to the technical field of membrane dryers, and in particular to a plate-type special gas membrane dryer. Background Art

[0002] As a basic chemical material, special gases are mainly used in large-scale petrochemicals, semiconductor devices, optical fibers, lasers, medical science, clinical diagnosis, pharmaceutical disinfection, fruit ripening, food preservation and other fields. With the development of new product technologies, their application scope is becoming more and more extensive. Drying of special gases is also an important step in the effective use of special gases.

[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.

[0004] If a general membrane gas dryer is used, the purge gas source is the gas to be dried, which is relatively expensive, and some special gases are not suitable for discharge into the atmosphere as purge gas.

[0005] In the prior art, membrane dryers are used to dry compressed air, which utilize the water molecule permeation and diffusion characteristics of polymer membrane materials to dry the compressed air. Existing membrane dryers are usually tubular structures, which are large in size and have low pressure difference resistance. A large amount of purge gas is required for drying the compressed air. Utility Model Content

[0006] The present application provides a plate-type special gas membrane dryer, which solves the problems in the background technology by using compressed gas of a medium different from the gas to be dried for drying.

[0007] The present application provides a plate-type special gas membrane dryer, which has at least one end plate and a closing plate, wherein the end plate is arranged opposite to the closing plate, and a gas source inlet, a dry gas outlet, a purge gas inlet and a purge gas outlet are arranged on the end plate, and connectors connected to an external gas pipeline are arranged at the gas source inlet, the dry gas outlet and the purge gas inlet to realize the entry of the gas source, the outflow of the dry gas and the entry of the purge gas, and a regulating valve is arranged at the purge gas outlet to obtain different degrees of dry gas by adjusting the flow rate; at least one group of unit membrane groups is arranged between the end plate and the closing plate, and the unit membrane group is used to dry the gas entering through the gas source inlet and discharge the dried gas through the dry gas outlet.

[0008] Furthermore, the end plate and the closing plate are flat plate structures and have the same size, both being larger than the unit membrane group arranged therebetween.

[0009] Furthermore, the end plate and the closing plate are locked and installed via a locking structure, and the unit membrane group is located between the surrounding locking structures.

[0010] Furthermore, each group of the unit membrane groups has at least one flow field plate and one moisture permeable membrane assembly, the flow field plate and the moisture permeable membrane assembly are both arranged in a plate-type configuration, and the flow field plate and the moisture permeable membrane assembly are both provided with dry gas pores for circulation of dry gas, the dry gas pores are connected with the gas source inlet and the dry gas outlet on the end plate, the gas enters the dry gas pores of the unit membrane group through the gas source inlet and circulates, and after the moisture in the gas is separated by the moisture permeable membrane assembly of the unit membrane group, the dry gas flows through the dry gas pores to the dry gas outlet and flows out.

[0011] Furthermore, the flow field plate and the moisture permeable membrane assembly are also provided with purge gas channels for the circulation of purge gas, and the purge gas channels are connected with the purge gas inlet and the purge gas outlet on the end plate. High-pressure purge gas of a medium different from the dry gas enters the unit membrane group through the purge gas inlet to dry the dry gas, and then flows out through the purge gas outlet.

[0012] Furthermore, the purge gas inlet is adjacent to the dry gas outlet, and the purge gas outlet is adjacent to the gas source inlet, so that the flow direction of the purge gas in the unit membrane group is countercurrent to the flow direction of the dry gas in the unit membrane group.

[0013] Furthermore, the flow field plate at least has a purge airflow field plate, a purge airflow channel is arranged on one side of the purge airflow field plate, and the purge airflow channel is connected to the purge air hole channel of the purge airflow field plate; the purge airflow channel adopts a curved flow channel setting, the internal pressure of the purge airflow channel is reduced and the flow rate is increased, and the curved flow channels are densely distributed, which increases the contact area between the purge gas and the moisture permeable membrane assembly while ensuring the flow rate, thereby improving the water removal efficiency.

[0014] Furthermore, the flow field plate at least has a dry air flow field plate, a dry air flow channel is provided on one side of the dry air flow field plate, and both ends of the dry air flow channel are connected to the dry air channels at both ends of the dry air flow field plate.

[0015] Furthermore, the cross-sectional area of ​​the purge air channel is smaller than the cross-sectional area of ​​the drying air channel, and preferably the cross-sectional area of ​​the purge air channel is 2%-30% of the cross-sectional area of ​​the drying air channel.

[0016] Furthermore, the purge airflow field plate and the drying airflow field plate adopt two independent plate structures, the purge airflow channel and the drying airflow channel are both located on one side of the two independent plate bodies, and the other side of the independent plate body structure is a plane structure. The plane structures of the two independent plate body structures are relatively fitted to form a combination in which the purge airflow channel and the drying airflow channel are located on both sides.

[0017] Furthermore, the purge airflow field plate and the drying airflow field plate adopt a plate structure, and the purge airflow channel and the drying airflow channel are located on two opposite sides of the plate structure.

[0018] Furthermore, the flow field plates and the moisture permeable membrane components in each unit membrane group are arranged at intervals.

[0019] Furthermore, sealing structures are provided between the end plate and the flow field plate, and between the flow field plate and the moisture permeable membrane assembly, so as to ensure a sealed fluid space inside the plate-type special gas membrane dryer.

[0020] By implementing the above plate-type special gas membrane dryer, the following technical effects are achieved:

[0021] The present application adopts a plate structure with an overall flat design, a small size and high pressure difference resistance. The curved setting of the purge gas flow channel increases the contact area between the purge gas and the moisture permeable membrane component, which can increase the water removal efficiency and achieve an extremely high degree of drying when the purge gas consumption is low. The high-pressure gas of the purge gas medium and the drying gas medium is different, and the high-pressure characteristics of the compressed gas are effectively used to achieve the decompression, expansion and acceleration of the purge space flow field, thereby improving the water removal efficiency of the purge gas. It is easy to install and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] 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.

[0023] Figure 1 It is a schematic diagram of the structure of a plate-type special gas membrane dryer provided in an embodiment of the present application;

[0024] Figure 2 yes Figure 1 Exploded image;

[0025] Figure 3 for Figure 2 Schematic diagram of the end plate structure;

[0026] Figure 4 yes Figure 2 Schematic diagram of the purge gas flow field plate structure;

[0027] Figure 5 yes Figure 2 Schematic diagram of the dry air flow field plate structure;

[0028] Figure 6 yes Figure 2 Schematic diagram of the structure of the moisture permeable membrane assembly;

[0029] Wherein, the accompanying drawings are marked as follows:

[0030] 1. Plate type special gas membrane dryer, 10. End plate, 100. Gas source inlet, 101. Dry gas outlet, 102. Purge gas outlet, 103. Purge gas inlet, 11. Closing plate, 12. Unit membrane group, 120. Purge gas flow field plate, 1200. Purge gas flow channel, 1201. Purge gas pore channel, 121. Dry gas flow field plate, 1210. Dry gas flow channel, 1211. Dry gas pore channel, 122. Moisture permeable membrane assembly, 123. Sealing ring, 124. Sealing groove or sealing position, 13. Locking structure, 14. Regulating valve, 15. Connector. DETAILED DESCRIPTION

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] The present application provides a plate-type special gas membrane dryer 1, which is described in detail below.

[0036] See also Figure 1-Figure 6 The plate-type special gas membrane dryer 1 provided in this embodiment has at least one end plate 10 and one closing plate 11, the end plate 10 and the closing plate 11 are arranged opposite to each other, the end plate 10 and the closing plate 11 are both square plate structures, and the two are the same size, wherein the end plate 10 is provided with a gas source inlet 100, a drying gas outlet 101, a purge gas inlet 103 and a purge gas outlet 102, and the gas source inlet 100, the purge gas inlet 103 and the drying gas outlet 101 are all provided with connectors 15 connected to the external gas pipeline, so as to realize the entry of the gas source and the drying gas The outflow of purge gas and the inflow of sweep gas, it should be noted here that the sweep gas of this scheme adopts a compressed gas different from the gas source gas medium, and the sweep gas is introduced into the membrane drying gas through an independent sweep gas inlet 103. The sweep gas medium is a high-pressure gas different from the drying gas medium, and the high-pressure characteristics of the compressed gas are effectively utilized to realize the decompression, expansion and acceleration of the flow field in the sweep space, thereby improving the water removal efficiency of the sweep gas; a regulating valve 14 is provided at the sweep gas outlet 102, and different degrees of dry gas are obtained by adjusting the flow rate; the closing plate 11 adopts a completely flat plate structure.

[0037] The end plate 10 and the closing plate 11 are locked and installed by a locking structure 13. The locking structure 13 can adopt a conventional screw or an adjusting screw and a nut or other locking member. In this embodiment, the locking structure 13 of the adjusting screw is adopted. Other locking matching structures are also applicable to this scheme. Since the locking structure 13 is a conventional locking structure, it will not be described one by one here. It can realize the locking installation between the two plates of the end plate 10 and the closing plate 11.

[0038] At least one group of unit membrane groups 12 is arranged between the end plate 10 and the closing plate 11. The unit membrane group 12 is smaller than the size of the end plate 10 and the closing plate 11, so that the unit membrane group 12 can be completely placed inside the locking structure 13 surrounded between the end plate 10 and the closing plate 11. The unit membrane group 12 is used to dry the gas entering through the gas source inlet 100, and the dried gas is discharged through the dry gas outlet 101. More specifically, each unit membrane group 12 has at least one flow field plate and one moisture permeable membrane assembly 122. Both the flow field plate and the moisture permeable membrane assembly 122 are plate-type, and both the flow field plate and the moisture permeable membrane assembly 122 are provided with dry gas pores 1211 for gas circulation. The gas enters the dry gas pores 1211 of the unit membrane group 12 through the gas source inlet 100 and circulates therein. After the moisture in the gas is separated by the moisture permeable membrane assembly 122 of the unit membrane group 12, the dry gas flows through the dry gas pores 1211 to the dry gas outlet 101 and flows out.

[0039] The flow field plate and the moisture permeable membrane assembly 122 are also provided with a purge gas channel 1201 for the circulation of purge gas. The purge gas channel 1201 is connected to the purge gas inlet 103 and the purge gas outlet 102 on the end plate 10. The high-pressure purge gas of a medium different from the dry gas enters the unit membrane group 12 through the purge gas inlet 103 to dry the dry gas and then flows out through the purge gas outlet 102.

[0040] The purge gas inlet 103 is disposed adjacent to the dry gas outlet 101 , and the purge gas outlet 102 is disposed adjacent to the gas source inlet 100 , so that the flow direction of the purge gas in the unit membrane group 12 is countercurrent to the flow direction of the dry gas in the unit membrane group 12 .

[0041] The flow field plate at least has a purge flow field plate 120, and a purge flow channel 1200 is arranged on one side of the purge flow field plate 120, and the purge flow channel 1200 is connected to the purge gas hole 1201 of the purge flow field plate 120; the purge flow channel 1200 adopts a curved flow channel setting, and the internal pressure of the purge flow channel 1200 is reduced and the flow rate is increased. The curved flow channels are densely distributed, which increases the contact area between the purge gas and the moisture permeable membrane assembly 122 while ensuring the flow rate, thereby improving the water removal efficiency. In other embodiments, a straight flow channel setting may also be adopted.

[0042] The flow field plate at least has a dry air flow field plate 121, and a dry air flow channel 1210 is provided on one side of the dry air flow field plate 121, and both ends of the dry air flow channel 1210 are connected to the dry air pores 1211 at both ends of the dry air flow field plate 121. In this embodiment, the dry air flow field plate 121 adopts a straight flow channel setting, and a trumpet-shaped structure with a large opening is formed between the dry air pores 1211 at both ends and the dry gas flow channel. In other embodiments, the flow channel of the dry air flow field plate 121 can also be arranged in an inclined or curved manner.

[0043] The cross-sectional area of ​​the purge air channel 1200 is smaller than that of the drying air channel 1210 , and the preferred area ratio is that the cross-sectional area of ​​the purge air channel 1200 is 2%-30% of the cross-sectional area of ​​the drying air channel 1210 .

[0044] In the present embodiment, the purge flow field plate 120 and the dry flow field plate 121 adopt two independent plate structures, the purge flow channel 1200 and the dry flow channel 1210 are both located on one side of the two independent plate bodies, and the other side of the independent plate body structure is a plane structure, and the plane structures of the two independent plate body structures are relatively fitted to form a combination of the purge flow channel 1200 and the dry flow channel 1210 located on two sides. In other embodiments, the purge flow field plate 120 and the dry flow field plate 121 adopt a plate structure, and the purge flow channel 1200 and the dry flow channel 1210 are located on two opposite sides of a plate structure.

[0045] It should be noted that the flow field plates and the moisture permeable membrane components 122 in each unit membrane group 12 are arranged at intervals. As shown in this embodiment, a purge airflow field plate 120-drying airflow field plate 121-moisture permeable membrane component 122-purge airflow field plate 120-drying airflow field plate 121-moisture permeable membrane component are arranged in sequence from the end plate 10 to the closing plate 11. If a single flow field plate structure is used as in other embodiments, a flow field plate-moisture permeable membrane component 122-flow field plate interval arrangement structure is adopted.

[0046] In addition, in the plate-type special gas membrane dryer 1 of the present scheme, sealing structures are provided between the end plate 10 and the flow field plate, between the flow field plate and the moisture permeable membrane assembly 122, and between the moisture permeable membrane assembly 122 and the closing plate 11 to ensure the sealed fluid space inside the plate-type special gas membrane dryer 1. More specifically, sealing grooves and / or sealing positions 124 are provided on the end plate 10, the flow field plate and the moisture permeable membrane assembly 122, and sealing rings 123 are installed on the sealing grooves and / or sealing positions 124 to achieve sealing.

[0047] In addition, in order to achieve a better sealing effect, sealing structures are provided at places such as the purge gas inlet 103, the purge gas outlet 102, the duct, etc. for sealing, and the sealing structure is the same as the sealing structure between the aforementioned plates.

[0048] 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.

[0049] 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.

[0050] The above is a detailed introduction to a plate-type special 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 plate-type special gas membrane dryer, characterized in that: The invention has at least one end plate and one closing plate, the end plate and the closing plate are arranged opposite to each other, the end plate is provided with a gas source inlet, a dry gas outlet, a purge gas inlet and a purge gas outlet, the gas source inlet, the dry gas outlet and the purge gas inlet are all provided with connectors connected with an external gas pipeline, and a regulating valve is provided at the purge gas outlet to obtain different degrees of dry gas by adjusting the flow rate; at least one group of unit membrane groups is provided between the end plate and the closing plate, the unit membrane group is used to dry the gas entering through the gas source inlet, and discharge the dried gas through the dry gas outlet.

2. The plate-type special gas membrane dryer according to claim 1, characterized in that: The end plate and the closing plate are flat plate structures and have the same size. The end plate and the closing plate are locked and installed via a locking structure, and the unit membrane group is located between the surrounding locking structures.

3. The plate-type special gas membrane dryer according to claim 1, characterized in that: Each group of the unit membrane groups has at least one flow field plate and one moisture permeable membrane assembly, the flow field plate and the moisture permeable membrane assembly are both arranged in a plate-type configuration, and the flow field plate and the moisture permeable membrane assembly are both provided with dry gas pores for circulation of dry gas, the dry gas pores are connected with the gas source inlet and the dry gas outlet on the end plate, the gas enters the dry gas pores of the unit membrane group through the gas source inlet and circulates, and after the moisture in the gas is separated by the moisture permeable membrane assembly of the unit membrane group, the dry gas flows through the dry gas pores to the dry gas outlet and flows out.

4. The plate-type special gas membrane dryer according to claim 3, characterized in that: The flow field plate and the moisture permeable membrane assembly are also provided with purge gas holes for the circulation of purge gas, and the purge gas holes are connected with the purge gas inlet and the purge gas outlet on the end plate. High-pressure purge gas of a medium different from the dry gas enters the unit membrane group through the purge gas inlet to dry the dry gas, and then flows out through the purge gas outlet.

5. The plate-type special gas membrane dryer according to claim 4, characterized in that: The purge gas inlet is adjacent to the dry gas outlet, and the purge gas outlet is adjacent to the gas source inlet, so that the flow direction of the purge gas in the unit membrane group is countercurrent to the flow direction of the dry gas in the unit membrane group.

6. The plate-type special gas membrane dryer according to claim 3, characterized in that: The flow field plate at least has a purge airflow field plate, a purge airflow channel is arranged on one side of the purge airflow field plate, and the purge airflow channel is connected to the purge air hole channel of the purge airflow field plate; the purge airflow channel adopts a curved flow channel setting, the internal pressure of the purge airflow channel is reduced and the flow rate is increased, and the curved flow channels are densely distributed, which increases the contact area between the purge gas and the moisture permeable membrane assembly while ensuring the flow rate, thereby improving the water removal efficiency.

7. The plate-type special gas membrane dryer according to claim 6, characterized in that: The flow field plate at least comprises a dry air flow field plate, a dry air flow channel is arranged on one side of the dry air flow field plate, and two ends of the dry air flow channel are connected with the dry air pores at two ends of the dry air flow field plate.

8. The plate-type special gas membrane dryer according to claim 7, characterized in that: The cross-sectional area of ​​the purge air channel is smaller than the cross-sectional area of ​​the drying air channel, and the cross-sectional area of ​​the purge air channel is 2%-30% of the cross-sectional area of ​​the drying air channel.

9. The plate-type special gas membrane dryer according to claim 7, characterized in that: The purge flow field plate and the dry flow field plate are two independent plate structures, the purge flow channel and the dry flow channel are both located on one side of the two independent plate structures, the other side of the independent plate structures are both planar structures, and the planar structures of the two independent plate structures are relatively fitted to form a combination of the purge flow channel and the dry flow channel located on two sides; or, The purge air flow field plate and the dry air flow field plate adopt a plate body structure, and the purge air flow channel and the dry air flow channel are located on two opposite sides of the plate body structure.

10. The plate-type special gas membrane dryer according to claim 3, characterized in that: A sealing structure is provided between the end plate and the flow field plate, and between the flow field plate and the moisture permeable membrane assembly, so as to ensure a sealed fluid space inside the plate-type special gas membrane dryer.

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