Column type hollow fiber microfiltration membrane assembly

Abstract

The utility model discloses a column type hollow fiber microfiltration membrane component which comprises a membrane shell, a membrane filament packaging head is installed on the upper side of the membrane shell, an upper sealing head is installed at the upper end of the membrane filament packaging head, a lower sealing head is installed on the lower side of the membrane shell, the upper sealing head and the lower sealing head are connected through a hoop and are convenient to disassemble, a checking opening is formed in the lower end of the lower sealing head, and the checking opening is communicated with the membrane shell. The cleaning is convenient; the membrane column provided by the utility model is applied to interception of suspended solids after hardness is removed by a chemical method, and can also be applied to filtration and clarification of suspended solids of other water, feeding is carried out in a pressurizing manner, the defect of low feeding pressure is overcome, and the lower part of the membrane column is provided with a pollutant holding space, so that the membrane column has very high pollutant holding capacity.

Description

Technical Field

[0001] This utility model relates to the field of filtration membrane technology, specifically a columnar hollow fiber microfiltration membrane module. Background Technology

[0002] Hollow fiber column membrane modules are a novel separation membrane technology with a unique structure and excellent performance, and have broad application prospects in water treatment, gas separation and biomedicine.

[0003] Hollow fiber column membrane modules use hollow fiber membranes as the separation layer, which are fixed within the column membrane module by filter media filling and a support structure. Hollow fiber membranes are composed of hollow fibers with a certain pore size and wall thickness, and have advantages such as high flux, high separation efficiency, fouling resistance, and recyclability.

[0004] Chinese patent discloses a filter membrane column (authorization announcement number CN 207605603 U), which has advantages such as compact structure, large filtration capacity, low pressure loss, and convenient maintenance; it also provides ultrafiltration and a stable structure. However, its dirt-holding capacity is insufficient. Therefore, this utility model provides a column-type hollow fiber microfiltration membrane module to solve the problems mentioned in the background art. Utility Model Content

[0005] The purpose of this invention is to provide a column-type hollow fiber microfiltration membrane module to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A columnar hollow fiber microfiltration membrane module includes a membrane shell, a membrane fiber encapsulation head is installed on the upper side of the membrane shell, an upper end cap is installed at the upper end of the membrane fiber encapsulation head, a lower end cap is installed on the lower side of the membrane shell, and an inspection port is provided at the lower end of the lower end cap for easy cleaning.

[0008] The lower middle part of the membrane housing is provided with an air inlet and a water inlet, which are located above the lower end cap. The air inlet and the lower end cap form a dirt collection chamber. Several membrane filaments are installed on the lower side of the membrane filament encapsulation head. The lower ends of the membrane filaments are suspended and located above the air inlet. The upper end cap is provided with a concentrate inlet and is connected to a product water inlet.

[0009] Preferably, both the upper and lower end caps are connected by clamps for easy disassembly.

[0010] Preferably, the air inlet and water inlet are located 400mm above the lower end cap.

[0011] Preferably, the water inlet, concentrate inlet, air inlet, and water inlet are all connected by threads for easy disassembly.

[0012] Preferably, the water inlet is connected to a booster pump for pressurized water intake.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This invention is applied to the interception of suspended solids after hardness removal by chemical methods, and can also be applied to the filtration and clarification of suspended solids in other water qualities.

[0015] By using pressurized feeding, the drawback of low feeding pressure is overcome, with a maximum pressure of up to 10 bar.

[0016] The lower part of the membrane column has a dirt-holding space, which provides a high dirt-holding capacity. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a columnar hollow fiber microfiltration membrane module.

[0018] In the diagram: 1. Membrane housing; 2. Membrane fiber encapsulation head; 3. Upper end cap; 4. Lower end cap; 5. Clamp; 6. Inspection port; 7. Air inlet; 8. Water inlet; 9. Membrane fiber; 10. Concentrate inlet; 11. Product water inlet. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1 In this embodiment of the utility model, a columnar hollow fiber microfiltration membrane module includes a membrane shell 1. A membrane fiber encapsulation head 2 is installed on the upper side of the membrane shell 1. An upper end cap 3 is installed at the upper end of the membrane fiber encapsulation head 2. A lower end cap 4 is installed on the lower side of the membrane shell 1. The upper end cap 3 and the lower end cap 4 are connected by a clamp 5 for easy disassembly. The lower end of the lower end cap 4 is provided with an inspection port 6 for easy cleaning.

[0021] The lower middle part of the membrane housing 1 is provided with an air inlet 7 and a water inlet 8, which are located above the lower end cap 4. The air inlet 7 and the lower end cap 4 form a dirt-collecting chamber. The air inlet 7 and the water inlet 8 are located 400mm above the lower end cap 4. Several membrane filaments 9 are installed on the lower side of the membrane filament encapsulation head 2. The lower ends of the membrane filaments 9 are suspended and located above the air inlet 7. The upper end of the upper end cap 3 is provided with a concentrate inlet 10. The upper end cap 3 is connected to a product water inlet 11. The product water inlet 11, concentrate inlet 10, air inlet 7, and water inlet 8 are all connected by threads for easy disassembly. The water inlet 8 is connected to a pressure pump for pressurized water intake.

[0022] The working principle of this utility model is as follows: water is pressurized and introduced through the inlet 8, filtered through the membrane fiber 9, and discharged from the outlet 11.

[0023] The advantages of this utility model are:

[0024] The membrane module is designed as a standard component with a diameter of DN200 and a height of 2232mm. The membrane shell is made of PVC and contains PTFE membrane fibers, with a membrane area of ​​approximately 10㎡. This is different from the column-type ultrafiltration membranes currently on the market (which use PVDF membranes; replacing them with PTFE membrane fibers makes them more flexible, less prone to breakage, and has better hydrophilicity and higher water permeability).

[0025] The newly designed column-type microfiltration membrane module has a similar appearance and working principle to column-type ultrafiltration, making it convenient for engineers who design and use column-type ultrafiltration.

[0026] The newly designed column-type microfiltration membrane module has its water and air inlets located 400mm above the lower end cap to ensure sufficient space at the bottom for contaminant collection.

[0027] The newly designed columnar microfiltration membrane module has membrane fibers with a diameter of 1mm, which is much thinner than 51- or 9-pore membrane fibers. It is comparable to the membrane fibers of existing columnar ultrafiltration membranes. However, hollow fiber columnar ultrafiltration membranes have a high packed area, while the packed area of ​​the columnar microfiltration membrane module is only 10 square meters. This low packing ratio ensures a large dirt-holding space inside the membrane.

[0028] The newly designed column-type microfiltration membrane module has improved membrane strength due to the thinner membrane fibers. The membrane fiber strength has been increased from the pressure resistance limit of 1.5 bar for 51-pore or 9-pore membranes to 10 bar. The water inlet method has also been changed from gravity flow to pressurized water inlet using a pump.

[0029] The newly designed column-type microfiltration membrane module has the same upper part as the column-type ultrafiltration module, which is cast with epoxy resin. However, the lower part of the column-type microfiltration membrane module is not encapsulated. The lower part of the membrane fiber is heat-fused and sealed. The total length of the membrane fiber is only 1500mm. The lower end does not reach the bottom and is suspended. This also provides a large space for dirt holding (about 400mm below the membrane column is empty and can be used as a space for storing sludge).

[0030] The membrane fibers are fixed in a way that only the upper layer of encapsulation is retained, while the lower layer is suspended in the air, similar to the swaying of seaweed. After air is introduced and stirred through the lower air inlet, impurities on the membrane fibers are more easily shaken off.

[0031] Assembly method: Both the upper and lower end caps are fixed with clamps for easy disassembly. They can be easily disassembled for cleaning or other issues such as blockages; all water inlets are threaded connections for easy disassembly.

[0032] The newly designed column-type microfiltration membrane module eliminates the need for influent to pass through a sedimentation tank, allowing the mixed solution after chemical reaction to directly enter the membrane.

[0033] The operation process of this utility model:

[0034] Inlet: Wastewater is pumped into the membrane through inlet 8 at the bottom. With the concentrate outlet 10 closed, water under pressure permeates from the outside of the membrane into the membrane core, collects, and is discharged through outlet 11. During filtration, some of the intercepted non-solid matter adheres to the membrane surface, while some settles to the bottom.

[0035] Aeration: After a certain period of operation, the membrane module can be stopped for aeration to shake off the solids adhering to the membrane.

[0036] Backwashing: Water is introduced in reverse through the water inlet 11 to wash away dirt from the membrane surface and remove any remaining solids from the bottom of the module through the drain outlet.

[0037] Backwashing with chemicals: During backwashing, acids and alkalis can be added to the backwash water to dissolve contaminants through chemical reactions, thus ensuring the cleaning effect.

[0038] Chemical cleaning of membranes:

[0039] The newly designed column-type microfiltration membrane module can be chemically cleaned using 10-15% hydrochloric acid, which is much higher than the acidity (pH 2-3) used for chemical cleaning of hollow fiber ultrafiltration membranes.

[0040] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A columnar hollow fiber microfiltration membrane module, comprising a membrane shell (1), characterized in that, A membrane filament encapsulation head (2) is installed on the upper side of the membrane shell (1), an upper end cap (3) is installed on the upper end of the membrane filament encapsulation head (2), and a lower end cap (4) is installed on the lower side of the membrane shell (1). An inspection port (6) is provided at the lower end of the lower end cap (4). The lower part of the membrane shell (1) is provided with an air inlet (7) and a water inlet (8). The air inlet (7) and the water inlet (8) are located above the lower end cap (4). The air inlet (7) and the lower end cap (4) are a dirt-collecting cavity. Several membrane filaments (9) are installed on the lower side of the membrane filament encapsulation head (2). The lower end of the membrane filaments (9) is suspended in the air and the lower end of the membrane filaments (9) is located above the air inlet (7). The upper end of the upper end cap (3) is provided with a concentrate inlet (10). The upper end cap (3) is connected to the product water inlet (11).

2. The column-type hollow fiber microfiltration membrane module according to claim 1, characterized in that, The upper end cap (3) and the lower end cap (4) are connected by clamps (5).

3. The columnar hollow fiber microfiltration membrane module according to claim 1, characterized in that, The air inlet (7) and water inlet (8) are located 400 mm above the lower end cap (4).

4. A columnar hollow fiber microfiltration membrane module according to claim 1, characterized in that, The water inlet (11), concentrate inlet (10), air inlet (7) and water inlet (8) are all connected by threads.

5. A columnar hollow fiber microfiltration membrane module according to claim 1, characterized in that, The inlet (8) is connected to a booster pump.

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