Drying device for degassing membrane module

Abstract

The utility model discloses a drying device of a degassing membrane component, which comprises the degassing membrane component, a liquid storage tank and a gas storage tank, the degassing membrane component comprises a shell, a central pipe arranged in the shell, auxiliary drying mechanisms arranged on two sides of the central pipe and a membrane wire component, the membrane wire assembly comprises a first membrane wire group, a second membrane wire group and a third membrane wire group which are composed of a plurality of fiber membrane wires, and the auxiliary drying mechanism comprises a hollow cylinder and a plurality of blowpipes which are uniformly connected to the bottom end of the hollow cylinder in the circumferential direction. According to the utility model, pure water in the membrane module is replaced by a low-surface-tension solvent, pure water on the surface of the membrane silk and the membrane silk holes can be discharged by adjusting the pressure, and hot air flows in the shell by feeding the hot air into the membrane silk module, so that the drying speed is further improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of degassing membrane components, and specifically relates to a drying device for a degassing membrane component. Background Technology

[0002] Degassing membrane modules contain numerous hollow fibers with tiny pores in their walls. Water molecules cannot pass through these pores, but gas molecules can. They are widely used in electronics, boiler feedwater systems, and the treatment of ammonia nitrogen wastewater. During the manufacturing and testing of degassing membrane modules, a significant amount of pure water remains inside. If left untreated, this water may breed bacteria, introducing impurities into subsequent industrial applications. Furthermore, wet transport significantly increases the risk of damage during transport and causes inconvenience. Therefore, conventional degassing membrane modules require dry packaging for shipment.

[0003] Due to the high surface tension and flash point of the residual pure water in the membrane module, it is difficult to dry all the membrane fibers in a short time. Traditional drying methods involve placing the membrane module in an oven, but this is time-consuming and energy-intensive. Furthermore, for larger membrane modules, a bulky oven is required, increasing the complexity of the process. In addition, oven drying may cause deformation and damage to the membrane fibers, and the cylindrical structure of the membrane module can easily lead to uneven drying. Therefore, it is necessary to research a drying device for degassing membrane modules. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the present invention aims to provide a drying device for a degassing membrane module. This device utilizes a low-surface-tension solvent to replace the pure water inside the membrane module. By adjusting the pressure, the pure water on the surface of the membrane fibers and in the membrane fiber pores can be discharged. Hot air is then sent into the membrane fiber module, causing the hot air to circulate inside the outer shell, thereby further accelerating the drying speed.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A drying device for a degassing membrane module includes a degassing membrane module, a liquid storage tank, and a gas storage tank. The degassing membrane module includes a shell, a central tube disposed inside the shell, auxiliary drying mechanisms disposed on both sides of the central tube, and a membrane fiber assembly. The membrane fiber assembly includes a first membrane fiber group, a second membrane fiber group, and a third membrane fiber group composed of several fiber membrane fibers. The auxiliary drying mechanism includes a hollow cylinder and a plurality of air blowing pipes uniformly connected to the bottom end of the hollow cylinder along the circumferential direction. The hollow part of the hollow cylinder and the cylindrical area enclosed by the plurality of air blowing pipes constitute an inner mounting area. The area between the two inner mounting areas, the outer side of the central tube, and the inner wall of the shell constitutes an outer mounting area. The first membrane fiber group is installed in the outer mounting area, and the second and third membrane fiber groups are respectively installed in the two inner mounting areas.

[0007] Preferably, the hollow cylinder has an internal cavity, and the blower pipe has multiple evenly distributed blow holes on both sides, with the top of the blower pipe connected to the bottom of the cavity.

[0008] Preferably, the upper and lower parts of the aforementioned housing are respectively provided with an upper mounting plate and a lower mounting plate for mounting the membrane filament assembly, and the top of the hollow cylinder passes through the upper mounting plate to connect to the drive mechanism.

[0009] Preferably, the top of the aforementioned outer shell is provided with a first outlet and a hot air inlet, the bottom is provided with a first inlet, and the upper and lower parts of one side are respectively provided with a second outlet and a second inlet, and the hot air inlet is connected to the cavity of the hollow cylinder through a flexible tube.

[0010] Preferably, the outlet and inlet of the aforementioned liquid storage tank are connected to the first inlet and the first outlet via pipelines, respectively.

[0011] Preferably, the outlet end of the aforementioned gas storage tank is connected to an air heater, and the air heater is connected to the first inlet, the second inlet and the hot air inlet through pipelines.

[0012] Preferably, the aforementioned first outlet and second outlet are connected to the detector via pipelines.

[0013] The advantages of this utility model are:

[0014] (1) This utility model utilizes a low surface tension solvent to replace the pure water in the membrane module. By adjusting the pressure, the pure water on the surface of the membrane fibers and in the membrane fiber pores can be discharged. The drying speed is fast, the structure is simple, the operation is convenient, and it will not damage the hollow membrane fibers in the membrane module.

[0015] (2) The auxiliary drying mechanism provided in this utility model can directly send hot air into the membrane fiber assembly, which can make the hot air and the membrane fiber come into contact faster and more evenly, and can make the hot air inside the shell flow, further accelerating the drying speed. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the degassing membrane module;

[0018] Figure 3 This is a cross-sectional view of the degassed membrane module A-A';

[0019] Figure 4 This is a cross-sectional view of the degassing membrane module;

[0020] Figure 5 This is a schematic diagram of the hollow cylinder structure.

[0021] The meanings of the reference numerals in the figure are as follows: 1. Liquid storage tank; 2. Gas storage tank; 4. Outer shell; 401. First outlet; 402. Hot air inlet; 403. First inlet; 404. Second outlet; 405. Second inlet; 5. Central tube; 6. First membrane fiber assembly; 7. Second membrane fiber assembly; 8. Third membrane fiber assembly; 9. Hollow cylinder; 10. Air blowing pipe; 11. Inner mounting area; 12. Outer mounting area; 13. Upper mounting plate; 14. Lower mounting plate; 15. Hoses; 16. Air heater; 17. Detector. Detailed Implementation

[0022] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0023] See Figure 1 A drying device for a degassing membrane module includes a degassing membrane module, a liquid storage tank 1 and a gas storage tank 2. The degassing membrane module includes a housing 4, a central tube 5 disposed inside the housing 4, auxiliary drying mechanisms disposed on both sides of the central tube 5, and a membrane fiber assembly.

[0024] See Figures 2-5 The membrane fiber assembly includes a first membrane fiber group 6, a second membrane fiber group 7, and a third membrane fiber group 8, each composed of several fiber membrane fibers. The auxiliary drying mechanism includes a hollow cylinder 9 and multiple air blowing pipes 10 evenly connected to the bottom of the hollow cylinder 9 along the circumferential direction. The cylindrical area formed by the hollow part of the hollow cylinder 9 and the multiple air blowing pipes 10 constitutes the inner mounting area 11. The area between the two inner mounting areas 11, the outer side of the central tube 5, and the inner wall of the outer shell 4 constitutes the outer mounting area 12. The first membrane fiber group 6 is installed in the outer mounting area 12, and the second membrane fiber group 7 and the third membrane fiber group 8 are respectively installed in the two inner mounting areas 11. Dividing the membrane fiber group into three parts, fixing them separately, and installing the auxiliary drying mechanism in the middle of the membrane fiber group can effectively improve the drying effect. Hot air can be directly introduced into the interior of the membrane fiber assembly through the air blowing pipes 10, which can make the hot air contact the membrane fibers faster and more evenly, and can also make the hot air inside the outer shell 4 flow, further accelerating the drying speed.

[0025] The hollow cylinder 9 has an internal cavity. Multiple evenly distributed air holes are provided on both sides of the air blower 10, with the top of the air blower 10 connected to the bottom of the cavity. The outer shell 4 has a first outlet 401 and a hot air inlet 402 at its top, a first inlet 403 at its bottom, and a second outlet 404 and a second inlet 405 on the upper and lower parts of one side, respectively. The hot air inlet 402 is connected to the cavity of the hollow cylinder 9 via a flexible hose 15. The hose 15 can be selected with an appropriate connection length according to actual conditions to avoid affecting the rotation of the hollow cylinder 9.

[0026] The upper and lower parts of the outer casing 4 are respectively provided with an upper mounting plate 13 and a lower mounting plate 14 for mounting the membrane fiber assembly. The top of the hollow cylinder 9 passes through the upper mounting plate 13 and is connected to the drive mechanism. The drive mechanism includes a rotating shaft and a rotating motor fixedly connected inside the hollow cylinder 9. The rotating motor is located at the top of the outer casing 4. The rotating motor can drive the rotation of the hollow cylinder 9. Since the hollow cylinder 9 is also connected to a flexible hose 15, its rotation mode is set to rotate 90° clockwise and then 90° counterclockwise, and so on repeatedly, so that the hot air sent into the outer casing 4 can circulate.

[0027] The outlet and inlet of the storage tank 1 are connected to the first inlet 403 and the first outlet 401 respectively via pipelines. A circulation pump and valve V are sequentially installed between the storage tank 1 and the first inlet 403. Valve VI and pressure gauge I are installed between the storage tank 1 and the first outlet 401 of the membrane module. The liquid in the storage tank 1 is a low surface tension liquid, with a surface tension of less than 25 dyn / cm, and can be ethanol or methanol.

[0028] Preferably, the outlet end of the aforementioned gas storage tank 2 is connected to an air heater 16, and the air heater 16 is connected to a first inlet 403, a second inlet 405, and a hot air inlet 402 via pipelines. A valve Ш is provided between the air heater 16 and the first inlet 403 of the membrane module, a valve Ⅱ is provided between the air heater 16 and the second inlet 405, and a valve Ⅶ is provided between the air heater 16 and the hot air inlet 402.

[0029] The first outlet 401 and the second outlet 404 are connected to the detector 17 through pipelines. A valve I is provided between the first outlet 401 and the detector 17, and a pressure gauge II and a valve IV are provided between the second outlet 404 and the detector 17.

[0030] To better illustrate this utility model, its working process is described in detail below:

[0031] First, drain most of the residual water in the module by gravity. Place a low surface tension displacement liquid in the storage tank 1, turn on the circulation pump, open valves V and VI, and close valves I, II, Ш, IV and VII. This allows the displacement liquid to circulate within the membrane module, displacing most of the residual pure water. At the same time, the surface tension of the mixed liquid decreases after the two liquids are mixed, making it easier to wet the membrane fibers. Then, turn off the circulation pump and allow the liquid in the module to flow back into the storage tank by gravity.

[0032] Close valves V and VI, turn on gas heating device 3, and open valves II, IV, and VII to allow hot air to enter the membrane module through the second inlet. Simultaneously, activate the drive mechanism; as the air blowing pipe rotates, hot air is sent into the membrane fiber module and flows out from the second outlet 404. Close valves IV and VII, and adjust valve II to maintain a certain pressure between the second outlet 404 and the first outlet 401 of the module. Open valves Ш and Ⅰ; hot air enters the central tube 5 through the first inlet 403, passes through the circular hole on the central tube 5 into the membrane fiber module, and then flows out from the first outlet 401. Adjust valve Ⅰ to maintain pressure in the pipeline, ensuring that pressure gauge Ⅰ is less than 100. kPa; Since the gas pressure on the outside of the membrane fiber is higher than that on the inside of the membrane fiber, the liquid in the hole can be slowly squeezed into the inside of the membrane fiber, and then flow out through the first outlet 401 along with the hot air from the inside of the membrane fiber; Observe the detection value of the detector 17 to determine whether there is any residual volatile liquid in the module. If no residue is detected, open the valve IV and observe the value of the detector 17 until the reading of the detector 17 indicates that there is no residual liquid.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that the above embodiments do not limit this utility model in any way, and all technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of this utility model.

Claims

1. A drying apparatus of a degassing membrane module comprising a degassing membrane module, a liquid storage tank (1) and a gas storage tank (2), characterized in that, The degassing membrane assembly comprises a shell (4), a center tube (5) arranged inside the shell (4), an auxiliary drying mechanism arranged on both sides of the center tube (5), and a membrane filament assembly, wherein the membrane filament assembly comprises a first membrane filament group (6), a second membrane filament group (7) and a third membrane filament group (8) composed of a plurality of fiber membrane filaments, the auxiliary drying mechanism comprises a hollow cylinder (9) and a plurality of blow pipes (10) connected to the bottom end of the hollow cylinder (9) in the circumferential direction, the hollow part of the hollow cylinder (9) and the cylindrical area surrounded by the plurality of blow pipes (10) form an inner mounting area (11), the area between the two inner mounting areas (11), the outer side of the center tube (5) and the inner wall of the shell (4) forms an outer mounting area (12), the first membrane filament group (6) is mounted in the outer mounting area (12), and the second membrane filament group (7) and the third membrane filament group (8) are respectively mounted in the two inner mounting areas (11).

2. A drying apparatus for a deaeration membrane module according to claim 1, wherein The hollow cylinder (9) is internally provided with a cavity, and the blow pipes (10) are provided with a plurality of uniformly distributed blow holes on both sides, and the top end of the blow pipe (10) is communicated with the bottom of the cavity.

3. A drying apparatus for a deaeration membrane module according to claim 2, wherein The upper part and the lower part of the shell (4) are respectively provided with an upper mounting plate (13) and a lower mounting plate (14) for mounting the membrane filament assembly, and the top of the hollow cylinder (9) penetrates the upper mounting plate (13) and is connected with a driving mechanism.

4. A drying apparatus for a deaeration membrane module according to claim 2, wherein The top end of the shell (4) is provided with a first outlet (401) and a hot air inlet (402), the bottom end is provided with a first inlet (403), the upper part and the lower part of one side are respectively provided with a second outlet (404) and a second inlet (405), and the hot air inlet (402) is communicated with the cavity of the hollow cylinder (9) through a hose (15).

5. A drying apparatus for a deaeration membrane module according to claim 4, wherein The outlet and the inlet of the liquid storage tank (1) are respectively connected with the first inlet (403) and the first outlet (401) through pipelines.

6. A drying apparatus for a deaeration membrane module according to claim 4, wherein The outlet end of the gas storage tank (2) is connected with an air heater (16), and the air heater (16) is connected with the first inlet (403), the second inlet (405) and the hot air inlet (402) through pipelines.

7. A drying apparatus for a deaeration membrane module according to claim 4, wherein The first outlet (401) and the second outlet (404) are connected with a detector (17) through pipelines.

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