Steady-state laminar flow membrane pool

Abstract

The present invention belongs to the field of membrane technology, and specifically relates to a steady-state laminar flow filter membrane pool, comprising a sealed lower half and an upper half, a cavity is provided in the middle of the fitting surface of the two halves, a liquid inlet channel and a liquid outlet channel are provided inside the lower half, the liquid inlet of the liquid inlet channel and the liquid outlet of the liquid outlet channel are respectively connected to the outside, the liquid outlet of the liquid inlet channel and the liquid inlet of the liquid outlet channel are a plurality of circular holes and are all connected to the cavity, and the upper half is provided with a permeate channel, and a porous sieve plate is provided at the liquid inlet of the permeate channel, and the liquid outlet is connected to the outside. The above scheme overcomes the various interferences caused by turbulence and turbulence as well as various random disturbances, and maintains the stability of the performance of the membrane; the setting of the porous sieve plate can prevent the membrane from being deformed or even damaged when pressure is applied for filtration, which affects the filtration results.

Description

Technical Field

[0001] The invention belongs to the field of membrane technology, and in particular relates to a steady-state laminar flow filter membrane pool. Background Art

[0002] The so-called membrane filter pool is a membrane filter container used to place the membrane and ensure that the membrane maintains its posture during use. The membrane filter pool containing the membrane can also be regarded as a filter.

[0003] During operation, polymer membranes often need to be pressurized to ensure that the membrane has a stable permeation flux. However, most membranes are not rigid enough and are easily damaged under high pressure, resulting in a short service life of the membrane and poor filtration effect. Summary of the invention

[0004] The object of the present invention is to provide a steady-state laminar flow filter membrane pool, which can keep the shape of the membrane from being destroyed, does not affect the penetration effect of the membrane, and prolongs the service life of the membrane.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a steady-state laminar flow membrane pool, including a lower half and an upper half that are sealed and connected, a cavity is opened in the middle of the fitting surface of the two halves, a liquid inlet channel and a retained liquid channel are arranged inside the lower half, the liquid inlet of the liquid inlet channel and the liquid outlet of the retained liquid channel are respectively connected to the outside, the liquid outlet of the liquid inlet channel and the liquid inlet of the retained liquid channel are a plurality of circular holes and are all connected to the cavity, the upper half is provided with a permeate channel, a porous sieve plate is arranged at the liquid inlet of the permeate channel, and the liquid outlet is connected to the outside.

[0006] In the above scheme, the diaphragm is clamped at the fitting surface between the two halves, and the liquid to be filtered enters a cavity through the liquid inlet channel of the lower body and is then filtered by the diaphragm. In this way, various interferences caused by turbulence and various random disturbances are overcome, and the stability of the diaphragm performance is maintained; the setting of the porous sieve plate can prevent the diaphragm from being deformed or even damaged when pressure is applied for filtration, thereby affecting the filtration results. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a top view of the upper and lower body;

[0008] Figure 2 , 3 It is a cross-sectional view of the upper and lower halves.

[0009] In the figure: 10-lower body, 11-lower body liquid inlet channel, 12-lower body retained liquid channel, 20-upper body, 21-upper body permeate liquid channel, 22-stainless steel porous sieve plate DETAILED DESCRIPTION

[0010] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings.

[0011] A steady-state laminar flow membrane pool comprises a sealed connected lower half 10 and an upper half 20, wherein a cavity is provided in the middle of the fitting surfaces of the two halves 10 and 20, wherein a liquid inlet channel 11 and a retained liquid channel 12 are provided inside the lower half 10, wherein the liquid inlet of the liquid inlet channel 11 and the liquid outlet of the retained liquid channel 12 are respectively connected to the outside, wherein the liquid outlet of the liquid inlet channel 11 and the liquid inlet of the retained liquid channel 12 are a plurality of circular holes and are all connected to the cavity, wherein the upper half 20 is provided with a permeate channel 21, wherein a porous sieve plate 22 is provided at the liquid inlet of the permeate channel 21, and the liquid outlet is connected to the outside.

[0012] The cavity is a circular groove with a depth of 1-3 mm opened at the center of the top of the lower body 10.

[0013] The fitting surfaces of the two halves are embedded in a concave upper and convex lower configuration, and the cavity is a circular groove formed on a boss at the top of the lower half 10. This can further improve the stability of the membrane pool under high pressure conditions.

[0014] A sealing ring is arranged on the outer extension of the circular groove on the top boss of the lower half body 10. The sealing ring is arranged in two inner and outer parts to ensure good sealing performance under high pressure conditions.

[0015] The plurality of circular holes of the liquid outlet of the liquid inlet channel 11 of the lower body 10 and the liquid inlet of the retained liquid channel 12 are arranged in arc shapes, and the two arcs are symmetrically distributed near the edge of the bottom of the circular groove.

[0016] The porous sieve plate 22 is a stainless steel porous sieve plate with a pore size less than 0.3 micrometers.

[0017] The liquid inlet of the liquid inlet channel 11 of the lower body 10 and the liquid outlet of the retained liquid channel 12 are respectively arranged on two opposite sides of the lower body 10 .

[0018] The two halves 10 and 20 are fastened together by bolts; further, the cross-sections of the two halves 10 and 20 are both square, and the bolts are arranged at corresponding positions of the four corners of the two halves.

[0019] The membrane filter pool of the present invention is used to test membrane performance (for example, the membrane pool in the application entitled "Membrane Performance Testing Method and Device" filed on the same day as the present application). During the membrane performance testing process, the running trajectory of the raw liquid is to move horizontally into the membrane pool, move upward through the circular vertical holes distributed in an arc shape and flow evenly upward to form a stable flowing liquid curtain; then flow through the membrane surface in a laminar translational manner with a laminar flow thickness of less than 0.3 mm, move downward through the circular vertical holes distributed in an arc shape and flow evenly downward, and then flow out of the membrane pool in a horizontal manner. This flow process can overcome the turbulence and turbulence caused by high pressure, as well as various interferences caused by various random disturbances, to ensure the stability of the test. The applicant has proved through multiple experiments that the test results have good reproducibility and repeatability.

Claims

1. A steady-state laminar flow membrane filter tank, characterized in that: The invention comprises a lower half body (10) and an upper half body (20) which are sealed and connected, wherein a cavity is provided in the middle of the fitting surfaces of the two half bodies (10, 20), wherein a liquid inlet channel (11) and a retained liquid channel (12) are provided inside the lower half body (10), wherein the liquid inlet of the liquid inlet channel (11) and the liquid outlet of the retained liquid channel (12) are respectively connected to the outside, wherein the liquid outlet of the liquid inlet channel (11) and the liquid inlet of the retained liquid channel (12) are a plurality of circular holes of the same shape, size and number and are all connected to the cavity, and wherein the upper half body (20) is provided with a permeate channel (21), wherein a porous sieve plate (22) is provided at the liquid inlet of the permeate channel (21), and the liquid outlet is connected to the outside; The plurality of circular holes of the liquid outlet of the liquid inlet channel (11) of the lower body (10) and the liquid inlet of the retained liquid channel (12) are arranged in an arc shape, and the two arcs are symmetrically distributed near the edge of the bottom of the circular groove; The fitting surfaces of the two halves are embedded in a concave upper part and convex lower part, and the cavity is a circular groove formed on a boss at the top of the lower half (10).

2. The steady-state laminar flow membrane filter pool according to claim 1, characterized in that: The cavity is a circular groove with a depth of 1-3 mm opened at the center of the top of the lower body (10).

3. The steady-state laminar flow membrane filter pool according to claim 1, characterized in that: A sealing ring is provided on the top boss of the lower half body (10) and on the outer extension of the circular groove.

4. The steady-state laminar flow membrane filter pool according to claim 3, characterized in that: The sealing rings are provided with two inner and outer ones.

5. The steady-state laminar flow membrane filter pool according to claim 1, characterized in that: The porous sieve plate (22) is a stainless steel porous sieve plate with a pore size of less than 0.3 micrometers.

6. The steady-state laminar flow membrane filter pool according to claim 1, characterized in that: The liquid inlet of the liquid inlet channel (11) of the lower half body (10) and the liquid outlet of the retained liquid channel (12) are arranged on two opposite sides of the lower half body (10).

7. The steady-state laminar flow membrane filter pool according to claim 1, characterized in that: The two halves (10, 20) are fastened and connected by bolts.

8. The steady-state laminar flow membrane filter pool according to claim 7, characterized in that: The overall cross-sections of the two halves (10, 20) are both square, and bolts are arranged at corresponding positions of the four corners of the two halves.

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