External pressure type hollow membrane module

Abstract

The utility model discloses an external pressure type hollow membrane component which comprises a cylindrical shell, a movable end cover, a hollow fiber membrane bundle, a stock solution rectifying piece and an aeration mechanism, one end of the hollow fiber membrane bundle is fixedly connected to the movable end cover, the movable end cover is detachably connected to one end part of the cylindrical shell, the hollow fiber membrane bundle is positioned in the cylindrical shell, and the stock solution rectifying piece is positioned in the cylindrical shell. The aeration mechanism is arranged at the other end part of the cylindrical shell, and one end part of the cylindrical shell is provided with a first liquid outlet channel and a second liquid outlet channel; the stock solution rectifying part comprises a liquid inlet end and a plurality of liquid outlet ends, the liquid inlet end is communicated with the liquid outlet ends, and the liquid outlet ends are evenly distributed in the circumferential direction of the cylindrical shell. A traditional hollow fiber membrane bundle with two pouring and fixing ends is designed into a single-end pouring structure, so that the shaking property and the flexibility of each fiber membrane can be improved during aeration. The hollow fiber membrane bundle is fixed on the movable end cover and can be disassembled and assembled, so that the filter element is convenient to replace, wash and the like, the cost is saved, the efficiency is high, and flexibility and convenience are realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to hollow filter membrane technical field, in particular to a kind of outer pressure type hollow membrane module. BACKGROUND

[0002] Existing sewage treatment, often use hollow membrane module to filter. The existing hollow membrane module usually includes a plurality of hollow fiber membranes consisting of hollow fiber membrane bundle, and the cylindrical shell for containing the hollow fiber membrane bundle, the two ends of the conventional hollow fiber membrane bundle are respectively fixed by casting in the two ends of the cylindrical shell, so that the two ends of the hollow fiber membrane bundle are respectively formed with fixed plug (cast formation). Plug, such as publication number CN 117771949 A, application name is "hollow fiber membrane module" "bonding fixed part".

[0003] The design of the plug at the two ends of the conventional hollow fiber membrane bundle, in the use process, the shaking of each hollow fiber is poor, easy to accumulate sludge, affect the service life and use effect of filter membrane.

[0004] Therefore, the present inventors have conducted in-depth research and thus come up with the present application. INVENTION CONTENTS

[0005] The utility model discloses a kind of outer pressure type hollow membrane module that can reduce the attachment of membrane surface.

[0006] To achieve the above purpose, the technical scheme of the utility model is:

[0007] A kind of outer pressure type hollow membrane module, including cylindrical shell, movable end cover, hollow fiber membrane bundle, stock solution rectifier and aeration mechanism, one end of the hollow fiber membrane bundle is fixedly connected to the movable end cover, the movable end cover is connected to one end of the cylindrical shell in a detachable manner, the hollow fiber membrane bundle is located in the inside of the cylindrical shell, the aeration mechanism is installed and arranged in the other end of the cylindrical shell, one end of the cylindrical shell is equipped with first liquid outlet passage and second liquid outlet passage;

[0008] The stock solution rectifier includes liquid inlet end and a plurality of liquid outlet ends, the liquid inlet end is communicated with a plurality of the liquid outlet ends, and the liquid outlet ends are evenly arranged along the circumferential direction of the cylindrical shell.

[0009] Further, the first liquid outlet passage is a common channel for stock solution liquid inlet and concentrated liquid outlet, and the liquid inlet end is communicated with the first liquid outlet passage.

[0010] Further, the movable end cover includes fixed side ring and casting top cover, one end of the hollow fiber membrane bundle is fixed to the fixed side ring by casting, and the casting top cover is formed, and the fixed side ring is connected with the

[0011] The shell wall of the cylindrical shell is sealingly connected, the pouring top cover is formed with a cylindrical hole, the outer pressure type hollow membrane assembly further comprises a communication pipe fixed to the cylindrical hole, and the communication pipe is connected in communication between the first liquid outlet channel and the liquid inlet end of the raw liquid rectifying member.

[0012] Further, the liquid outlet end of the raw liquid rectifying member corresponds to the top of the hollow fiber membrane bundle, and the aeration mechanism is arranged below the hollow fiber membrane bundle.

[0013] Further, the other end of the cylindrical shell is further provided with a residue outlet.

[0014] Further, the raw liquid rectifying member is in the shape of a rotating paddle, and the liquid outlet end is in the shape of a blade.

[0015] Further, the aeration mechanism has a plurality of aeration arms uniformly arranged along the circumferential direction of the cylindrical shell.

[0016] After the above technical scheme is adopted, the outer pressure type hollow membrane assembly has the following beneficial effects: the traditional hollow fiber membrane bundle fixed at both ends is designed as a structure fixed at one end, the upper end of the hollow fiber membrane bundle is a fixed end, the lower end is a free end, the aeration mechanism corresponds to the free end, and when aeration is performed, the shaking and flexibility of each fiber membrane can be increased, for example, when sewage is filtered, the filter effect of the fiber membrane can be avoided from being affected by the deposition of sludge on the outer surface of the fiber membrane. The hollow fiber membrane bundle is fixed on the movable end cover, and the movable end cover can be disassembled, so that the replacement, flushing and other operations of the filter core (hollow fiber membrane bundle) are facilitated, cost is saved, efficiency is high, and flexibility and convenience are achieved.

[0017] Further, when filtering, the raw liquid enters from the top of the liquid inlet end of the raw liquid rectifying member and spreads from the bottom of the liquid outlet end, a downward force can be applied to the raw liquid when the liquid outlet, the originally single-column liquid is dispersed (rectified) and evenly dispersed, the upward air pressure of the aeration mechanism located at the bottom is balanced, that is, water presses downward, gas goes upward, and mud is not easy to run upward, and the hollow fiber membrane bundle can also be prevented from being accumulated at the top, even if it is fixed at only one end. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is an exploded view of the outer pressure type hollow membrane assembly of the utility model;

[0019] Figure 2 It is a sectional view of the outer pressure type hollow membrane assembly of the utility model.

[0020] In the drawings:

[0021] Cylindrical shell 1;First liquid outlet channel 11;Second liquid outlet channel 12;Movable end cover 2;Fixed side ring 21;Pouring top cover 22;Cylindrical hole 221;Sealing ring 23;Communication pipe 24;Original liquid rectifier 3;Liquid inlet end 31;Liquid outlet end 32;Aeration mechanism 4. DETAILED DESCRIPTION

[0022] In order to further explain the technical scheme of the utility model, the utility model will be described in detail below through specific embodiments.

[0023] The utility model discloses an external pressure type hollow membrane module, as shown in Figure 1 And Figure 2 As shown, including cylindrical shell 1, movable end cover 2, hollow fiber membrane bundle (not shown in drawing), original liquid rectifier 3 and aeration mechanism 4, one end of the hollow fiber membrane bundle is fixedly connected to movable end cover 2, movable end cover 2 is connected to one end of cylindrical shell 1 in a detachable manner, the hollow fiber membrane bundle is located inside cylindrical shell 1, aeration mechanism 4 is installed and arranged at the other end of cylindrical shell 1, and one end of cylindrical shell 1 is provided with first liquid outlet channel 11 and second liquid outlet channel 12.

[0024] Original liquid rectifier 3 includes liquid inlet end 31 and a plurality of liquid outlet ends 32, and the liquid inlet end 31 is communicated with the plurality of liquid outlet ends 32 respectively, and the liquid outlet ends 32 are evenly arranged along the circumferential direction of the cylindrical shell 1. The liquid outlet end 32 is located between each fiber membrane of the hollow fiber membrane bundle and the shell wall of the cylindrical shell 1.

[0025] Specifically, the hollow fiber membrane bundle includes a plurality of fiber membranes. Movable end cover 2 is sealingly connected to the upper end of cylindrical shell 1 through sealing ring 23. Aeration mechanism 4 is arranged at the lower end of cylindrical shell 1. The upper end and the lower end of cylindrical shell 1 are respectively provided with sealing cover 14 to realize sealing connection. First liquid outlet channel 11 and second liquid outlet channel 12 are arranged on the sealing cover 14 located at the upper part.

[0026] First liquid outlet channel 11 is a common channel for original liquid inlet and concentrated liquid outlet, and the first liquid outlet channel 11 is connected with the liquid inlet end 31. The cylindrical shell 1 forms an original liquid area (which can form concentrated liquid after filtration) between each fiber membrane of the hollow fiber membrane bundle and the shell wall of the cylindrical shell 1. The first liquid outlet channel 11 is communicated with the original liquid area. The second liquid outlet channel 12 is a filtrate outlet channel, and the second liquid outlet channel 12 is respectively communicated with the hollow inside of each fiber membrane of the hollow fiber membrane bundle. The fiber membrane of the hollow fiber membrane bundle is arranged between the first liquid outlet channel 11 and the second liquid outlet channel 12.

[0027] The utility model discloses an outer pressure type hollow membrane module, the hollow fiber membrane bundle of traditional two end pouring fixed design becomes the structure of single end pouring, and the upper end of hollow fiber membrane bundle is fixed end, and the lower end is free end, and the aeration mechanism corresponds with free end, and when aeration, can increase the dither and flexibility of each fiber membrane, when carrying out sewage filtration, can avoid the sludge adhesion deposition on the outer surface of fiber membrane, and influence the filtration effect of fiber membrane. Hollow fiber membrane bundle is fixed on movable end cover 2, and the replacement, flushing and other operations of filter core (hollow fiber membrane bundle) are convenient, and it is flexible and convenient.

[0028] As a preferred implementation, movable end cover 2 includes fixed side ring 21 and pouring top cover 22, one end of hollow fiber membrane bundle is poured and fixed to fixed side ring 21, pouring top cover 22 is formed, and the middle part of pouring top cover 22 is formed with cylindrical hole 221. The outer pressure type hollow membrane module further includes communication pipe 24, and the communication pipe 24 is fixed to the cylindrical hole 221, and the communication pipe 24 is connected between the first liquid outlet channel 11 and the liquid inlet end 31 of the stock solution rectifier 3.

[0029] The liquid outlet end 32 of the stock solution rectifier 3 is located at the top of the hollow fiber membrane bundle body, and the aeration mechanism 4 is arranged at the bottom of the hollow fiber membrane bundle body.

[0030] When filtering, the stock solution is sequentially input through the first liquid outlet channel 11, sequentially passes through the liquid inlet end 31 and the liquid outlet end 32, and enters the stock solution area. After the stock solution is filtered through the fiber membrane, the hollow inside of the fiber membrane forms a permeate, and the outside of the fiber membrane, i.e. the stock solution area, forms a concentrated solution. When the permeate is collected, a concentration difference (caused by a pressure difference) is formed, and the concentrated solution can be discharged from bottom to top.

[0031] As a preferred implementation, the other end (the lower end in this embodiment) of the cylindrical shell 1 is also provided with a filter residue outlet 13. For example, when filtering sewage, the filter residue outlet 13 can be used as an outlet for mud and sand. When the concentrated solution is discharged from bottom to top, mud and sand and other filter residues are not easy to accumulate upwards due to their own gravity and the aerodynamic effect of the aeration mechanism 4. The reverse discharge of the concentrated solution can reduce or avoid the accumulation of mud and sand upwards, thereby improving the filtration effect of the fiber membrane.

[0032] As a preferred implementation, the stock solution rectifier 3 is in the shape of a rotating paddle, and the liquid outlet end 32 is in the shape of a blade. The liquid inlet end 31 is in the shape of a cylinder, and each liquid outlet end 32 is arranged along the axial direction of the liquid inlet end 31. The top of the liquid inlet end 31 is an open end, and the bottom of the liquid inlet end 31 is a closed end. The top of the liquid outlet end 32 is a closed end, and the bottom of the liquid outlet end 32 is an open end. The aeration mechanism 4 has a plurality of aeration arms 41 arranged uniformly along the circumferential direction of the cylindrical shell. This can increase the uniformity of aeration. In this embodiment, there are five aeration arms 41.

[0033] When filtering, the stock solution enters from the top of the liquid inlet end 31 and spreads from the bottom of the liquid outlet end 32. When discharging, a downward force can be applied to the stock solution, which disperses the originally single-column liquid evenly (rectifies) and balances the air pressure of the aeration mechanism 4 located at the bottom, i.e. water presses downward and air goes upward, so that mud is not easy to run upward and hollow fiber membrane bundles can also be prevented from accumulating at the top, even if only single-end fixed.

[0034] The above embodiments and drawings are not limited to the product form and style of the utility model, and any appropriate changes or modifications made by any ordinary skilled person in the art shall be considered as not departing from the patent category of the utility model.

Claims

1. An external pressure type hollow membrane module, characterized by: The application relates to an external-pressure hollow membrane module, which comprises a cylindrical shell, a movable end cover, a hollow fiber membrane bundle, a stock solution rectifying piece and an aeration mechanism. The stock solution rectifying piece comprises a liquid inlet end and a plurality of liquid outlet ends.

2. An external pressure type hollow membrane module according to claim 1, wherein: The first liquid outlet channel is a shared channel for stock solution liquid inlet and concentrated liquid outlet.

3. An external pressure type hollow membrane module according to claim 2, wherein: The movable end cover comprises a fixed side ring and a pouring top cover. The cylindrical shell is sealed and connected between the fixed side ring and the shell wall.

4. An external pressure type hollow membrane module according to claim 3, wherein: The pouring top cover is provided with a cylindrical hole.

5. An external pressure type hollow membrane module according to claim 3, wherein: The external-pressure hollow membrane module further comprises a communication pipe which is fixed to the cylindrical hole and connected between the first liquid outlet channel and the liquid inlet end of the stock solution rectifying piece.

6. An external pressure type hollow membrane module according to claim 1, wherein: The liquid outlet ends of the stock solution rectifying piece are located at the top of the hollow fiber membrane bundle.

7. An external pressure type hollow membrane module according to claim 1, wherein: The other end of the cylindrical shell is further provided with a filter residue outlet. The stock solution rectifying piece is in the shape of a rotating paddle, and the liquid outlet ends are in the shape of blades. The aeration mechanism comprises a plurality of aeration arms which are uniformly arranged along the circumferential direction of the cylindrical shell.

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