External uniform reverse blowing film drying structure

Abstract

The utility model belongs to the technical field of film drying, and discloses an external uniform blowback film drying structure and a film dryer, a dryer shell is installed on the outer surface of the film dryer, the two ends of the dryer shell are connected with protective shells through threads, and an air inlet and outlet end cover is installed at the top end of the outer surface of one protective shell. An air inlet and outlet module is installed on the outer surface of the protective shell and the side corresponding to the air outlet end cover, a film core rod is installed in the film dryer, a groove is formed in the outer surface of the air inlet and outlet end cover and penetrates through the interior of the air inlet and outlet end cover and the surface of the protective shell, and the groove and the outer surface of the dryer shell are combined to form an air cavity. The air inlet and outlet end cover is changed into a sweeping air access mode, so that the membrane dryer is more uniform in sweeping, water molecules permeating out of the surface of a membrane core rod can be further swept away, the water molecules on the surface of the membrane core rod can be continuously permeated, and the drying performance of compressed air is improved.

Description

Technical Field

[0001] This utility model belongs to the field of thin film drying technology, and in particular relates to an externally connected uniform backflush film drying structure. Background Technology

[0002] The drying performance of a membrane dryer depends on whether the water molecules that permeate from the membrane core rods and adhere to their outer surface are evenly swept across the outer surface of each membrane core rod, and whether the permeated water molecules are promptly carried away from the membrane core surface.

[0003] Currently, membrane dryer backflushing machines are divided into internal backflushing and external control backflushing. The internal backflushing function uses a dispersed blowing from the center of the membrane dryer outwards, which can evenly blow onto the surface of each membrane core rod.

[0004] Currently, external backflushing control only involves threaded holes on the surface of the membrane dryer shell to connect the drying purge gas. The drying gas flows from high pressure to low pressure in a linear motion, which cannot completely and evenly purge the surface of every membrane core rod. The drying performance of membrane core rods that are not purged will be ineffective.

[0005] Secondly, because compressed air flows at a very high speed from a region with higher pressure or even higher pressure to atmospheric pressure, when the high-speed compressed air blows directly onto the membrane core rod, it will cause the membrane core rod to fluctuate and be subjected to aerodynamic scouring. The fluctuation of the membrane core rod can easily cause fatigue of the membrane tube substrate, resulting in wire breakage and reduced lifespan. Utility Model Content

[0006] This invention addresses the problem in existing technologies where external backflushing control only involves opening threaded holes on the outer surface of the membrane dryer to connect the drying purge gas. The drying gas flows from high pressure to low pressure in a linear motion, which cannot completely and evenly purge the surface of each membrane core rod. Consequently, the drying performance of unpurged membrane core rods will fail. The following technical solution is proposed:

[0007] An externally connected uniform backflush membrane drying structure includes: a membrane dryer, a dryer shell mounted on the outer surface of the membrane dryer, and protective shells connected to both ends of the dryer shell by threads. An inlet / outlet end cap is mounted on the top of the outer surface of one of the protective shells, and an inlet / outlet module is mounted on the side of the outer surface of the protective shell corresponding to the outlet end cap. A membrane core rod is installed inside the membrane dryer. A groove is provided on the outer surface of the inlet / outlet end cap, penetrating the interior of the inlet / outlet end cap and the outer surface of the protective shell. The groove and the outer surface of the dryer shell combine to form an air cavity.

[0008] As a preferred embodiment of the above technical solution, the membrane core rod is provided with a central support.

[0009] As a preferred embodiment of the above technical solution, the membrane core rod is made of multiple hollow fiber membrane cores spirally wound and woven on the outer surface of the central support.

[0010] As a preferred embodiment of the above technical solution, the outer surface and interior of the air inlet / outlet end cap are provided with a plurality of air inlet / outlet holes, which are connected to the protective shell.

[0011] As a preferred embodiment of the above technical solution, both ends of the air inlet and outlet end caps are connected with screws via threads.

[0012] As a preferred embodiment of the above technical solution, both the air inlet / outlet end cap and the air inlet / outlet module are made of aluminum alloy.

[0013] The beneficial effects of this utility model are as follows:

[0014] (1) By changing the purge gas access method of the inlet and outlet end caps, the membrane dryer purges more evenly, thereby enabling the water molecules that have permeated the surface of the membrane core rod to be blown away. The water molecules on the surface of the membrane core rod can continue to permeate, thereby improving the compressed air drying performance.

[0015] (2) By changing the inlet hole to align with the surface of the membrane dryer shell, the airflow can be used to scour the surface of the shell, reducing the impact on the membrane core rod and improving the service life of the membrane core rod. Attached Figure Description

[0016] Figure 1 The diagram shown is a schematic diagram of an externally connected uniform backflush film drying structure in Example 1;

[0017] Figure 2 The diagram shown is an exploded view of an externally connected uniform backflush film drying structure in Example 1;

[0018] Figure 3 The diagram shown is a structural schematic of the protective casing in Embodiment 1;

[0019] Figure 4 The diagram shown is a structural schematic of the membrane dryer in Example 1.

[0020] In the diagram: 1. Membrane dryer; 2. Dryer housing; 3. Protective housing; 4. Inlet and outlet end caps; 5. Inlet and outlet modules; 6. Membrane core rod; 7. Groove; 8. Central support; 9. Screw. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0022] Example 1

[0023] This invention provides an externally connected uniform backflush film drying structure, such as... Figures 1 to 4As shown, it includes a membrane dryer 1, a dryer shell 2 installed on the outer surface of the membrane dryer 1, and protective shells 3 connected to both ends of the dryer shell 2 by threads. An inlet / outlet end cap 4 is installed on the top of the outer surface of one of the protective shells 3. An inlet / outlet module 5 is installed on the side of the outer surface of the protective shell 3 corresponding to the outlet end cap 4. A membrane core rod 6 is installed inside the membrane dryer 1. A groove 7 is provided on the outer surface of the inlet / outlet end cap 4. The groove 7 penetrates the interior of the inlet / outlet end cap 4 and the outer surface of the protective shell 3. The groove 7 and the outer surface of the dryer shell 2 combine to form an air cavity.

[0024] like Figure 4 As shown, the membrane core rod 6 is provided with a central support 8. By making the interior of the central support 8 hollow, the air flow inside the membrane core rod 6 is smoother, thereby improving the uniformity of drying after using the membrane dryer 1, and thus improving the drying efficiency of the membrane dryer 1.

[0025] like Figure 4 As shown, the membrane core rod 6 is made of multiple hollow fiber membrane cores spirally wound on the outer surface of the central support 8. The cross spiral winding method increases the partial pressure inside and outside the membrane core rod 6, thereby improving the water molecule distribution on the inner and outer surfaces of the membrane core rod 6. Under the action of pressure, the diffusion of water molecules is accelerated, thereby improving the efficiency of water molecule diffusion in the membrane dryer 1.

[0026] like Figures 1 to 3 As shown, the outer surface and interior of the air inlet / outlet end cap 4 are provided with several air inlet / outlet holes. The air inlet / outlet holes are connected to the protective shell 3. The setting of the air inlet / outlet holes can better connect the air inlet / outlet end cap 4 and the protective shell 3, ensure airflow during the drying process, and help regulate the internal air pressure to maintain the drying effect.

[0027] like Figures 1 to 3 As shown, both ends of the air inlet and outlet end cap 4 are connected to screws 9 by threads. The threaded grooves of the screws 9 are connected to the air inlet and outlet holes. By installing the screws 9 on the surface of the air inlet and outlet end cap 4, the number of air inlet and outlet holes is reduced. At this time, the air inlet and outlet volume is reduced, thereby allowing the air inlet and outlet volume to be controlled, and thus the size of the air inlet and outlet volume can be controlled.

[0028] like Figure 1 and Figure 2 As shown, the inlet and outlet end caps 4 and the inlet and outlet module 5 are both made of aluminum alloy. Multiple pipes are connected inside the inlet and outlet end caps 4 and the inlet and outlet module 5, and are connected to the membrane dryer 1 through these pipes. The multiple pipes can cooperate with each other to evenly distribute the pressure, avoiding the failure of the pipe due to excessive pressure in a single pipe, thereby ensuring the stability of the membrane dryer 1 during use.

[0029] Working principle: During use, the pre-treated humidified airflow enters the membrane dryer 1 through the inlet / outlet module 5. The airflow first passes through the central support 8 and enters the membrane dryer 1 through the inlet / outlet module 5, first entering the groove 7 and then flowing into the air chamber. After passing through the air chamber, the backflow airflow flows evenly into the membrane dryer 1 and sweeps onto the outer surface of the membrane core rod 6. Then, it is blown out from the top of the inlet / outlet end cap 4 through multiple high-speed air outlets. The above steps are repeated until the water vapor content reaches the preset standard. By changing the way the sweeping air is connected to the inlet / outlet end cap 4, the sweeping of the membrane dryer 1 is made more uniform, which enables the water molecules that have permeated the surface of the membrane core rod 6 to be swept away. The permeation of water molecules on the surface of the membrane core rod 6 can continue, thereby improving the drying performance of compressed air.

[0030] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it.

Claims

1. An externally connected uniform backflush film drying structure, characterized in that, include: A membrane dryer (1) is provided with a dryer shell (2) installed on its outer surface. Both ends of the dryer shell (2) are connected to a protective shell (3) by threads. One of the protective shells (3) has an inlet / outlet end cap (4) installed on the top of its outer surface. An inlet / outlet module (5) is installed on the side of the outer surface of the protective shell (3) corresponding to the outlet end cap (4). A membrane core rod (6) is installed inside the membrane dryer (1). A groove (7) is provided on the outer surface of the inlet / outlet end cap (4). The groove (7) penetrates the inside of the inlet / outlet end cap (4) and the outer surface of the protective shell (3). The groove (7) and the outer surface of the dryer shell (2) combine to form an air cavity.

2. The externally connected uniform backflush film drying structure according to claim 1, characterized in that, The membrane core rod (6) is provided with a central support (8).

3. The externally connected uniform backflush film drying structure according to claim 1, characterized in that, The membrane core rod (6) is made of multiple hollow fiber membrane cores spirally wound and woven on the outer surface of the central support (8).

4. The externally connected uniform backflush film drying structure according to claim 1, characterized in that, The air inlet and outlet end cap (4) has several air inlet and outlet holes on its outer surface and inside, and the air inlet and outlet holes are connected to the protective shell (3).

5. The externally connected uniform backflush film drying structure according to claim 1, characterized in that, Both ends of the air inlet and outlet end caps (4) are connected to screws (9) by thread.

6. The externally connected uniform backflush film drying structure according to claim 1, characterized in that, The inlet / outlet end cap (4) and the inlet / outlet module (5) are both made of aluminum alloy.

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