CN-122006483-A - Ceramic composite membrane module system with high packing density and double separation paths and use method

CN122006483ACN 122006483 ACN122006483 ACN 122006483ACN-122006483-A

Abstract

The invention relates to a double-path ceramic composite membrane component system and a use method thereof, belonging to the technical field of fluid membrane separation. The membrane shell comprises a water inlet and a second water producing port which are respectively arranged on the upper side and the lower side of the membrane shell, wherein an upper filler, an upper sealing gasket, a lower sealing gasket and a lower filler are sequentially arranged in the membrane shell from top to bottom, a first water producing port is arranged on the side wall of the membrane shell between the two sealing gaskets, a concentrated water port is arranged on the side wall of the membrane shell between the lower sealing gasket and the lower filler, the upper end and the lower end of a tubular ceramic membrane assembly are connected with the lower sealing gasket, the upper end of a hollow fiber ceramic membrane assembly is connected with the upper filler, and the lower end of the hollow fiber ceramic membrane assembly penetrates through the tubular ceramic membrane assembly to be connected with the lower filler. The system solves the problems of low filling density, narrow working condition suitability, large-scale application investment and high operation and maintenance cost of the traditional ceramic membrane while ensuring stable operation.

Inventors

BAI LANGMING
LI WENYE
ZHAO QIAN
DAI GAOXIN
WANG ZI
YANG JIAXUAN
LIANG HENG

Assignees

哈尔滨工业大学

Dates

Publication Date: 20260512
Application Date: 20260212

Claims (10)

1. The ceramic composite membrane module system with high packing density and double separation paths is characterized by comprising the following components: the upper side and the lower side of the membrane shell (7) are respectively provided with a water inlet (1) and a second water outlet (4), and an upper filler (8), an upper sealing gasket (9), a lower sealing gasket (9) and a lower filler (8) are sequentially arranged in the membrane shell (7) from top to bottom; a first water producing port (2) is arranged on the side wall of the membrane shell (7) between the two sealing gaskets (9), and a water concentrating port (3) is arranged on the side wall of the membrane shell (7) between the sealing gasket (9) at the lower side and the filler (8) at the lower side; the upper end and the lower end of the tubular ceramic membrane component (5) are connected with a sealing gasket (9) at the lower side; The upper end of the hollow fiber ceramic membrane bundle (6) is connected with the filler (8) at the upper side, and the lower end of the hollow fiber ceramic membrane bundle (6) passes through the tubular ceramic membrane assembly (5) to be connected with the filler (8) at the lower side.
2. The ceramic composite membrane module system with high packing density and double separation paths according to claim 1, further comprising a first check valve (12) arranged on a connecting pipeline between one end of a first pressure pump (13) and the first water producing port (2), and a first pressure valve (14) arranged at the other end of the first pressure pump (13); A second check valve (15) is arranged on a connecting pipeline between one end of the second pressure pump (16) and the second water producing port (4), and a second pressure valve (17) is arranged at the other end of the second pressure pump (16).
3. The ceramic composite membrane module system with high packing density and double separation paths according to claim 1 or 2, further comprising an upper end cover and a lower end cover which are separated, wherein a filler (8) is filled at the connecting part of the membrane shell (7) and the end cover, an O-shaped ring (11) is arranged between the membrane shell (7) and the end cover, and the membrane shell (7) is connected with the end cover through a flange (10).
4. A ceramic composite membrane module system with high packing density and double separation paths according to any one of claims 1 to 3, wherein a plurality of tubular ceramic membrane modules (5) are uniformly arranged, and hollow fiber ceramic membrane bundles (6) are correspondingly arranged in each tubular ceramic membrane module (5).
5. The high packing density double separation path ceramic composite membrane module system as claimed in claim 4, wherein the membrane flux diameter of the tubular ceramic membrane module (5) is 2-10 mm, the membrane pore diameter is 1-5000 nm, and the membrane material is one or more of alumina, titania, zirconia and silicon carbide; the inner diameter of the hollow fiber ceramic membrane bundle (6) is 0.5-2 mm, the pore diameter of the membrane is 1-1000 nm, and the membrane is made of one or more of aluminum oxide, titanium oxide, zirconium oxide and silicon carbide; the encapsulating layer is one or more of epoxy resin, polyurethane and silicone rubber, and the thickness of the encapsulating layer is 20-40 mm.
6. A method for using the ceramic composite membrane module system with high packing density and double separation paths is characterized in that the ceramic composite membrane module system with high packing density and double separation paths as set forth in any one of claims 1-5 comprises the following steps: the membrane filtration water production stage comprises single-path separation and double-path cooperative separation; And (3) a back flushing stage.
7. The method of using a high packing density dual separation path ceramic composite membrane module system of claim 6, wherein the single path separation comprises the steps of: Step D1, raw water enters the membrane shell (7) through the water inlet (1), and the water inlet rate is adjusted to enable the ratio of the effective water inlet volume to the water inlet rate in the membrane shell (7) to be set hydraulic retention time; Step D2, starting a first pressure pump (13) or a second pressure pump (16) to respectively drive the corresponding water-producing power units to produce water for output; Step D3, membrane filtration separation is completed on the sewage in the membrane shell (7), wherein one path is that the sewage permeates through the membrane wall of the tubular ceramic membrane assembly (5) to enter the tubular membrane water producing port (2), or one path is that the sewage permeates through the membrane wall of the hollow fiber ceramic membrane bundle (6) to enter the hollow fiber membrane water producing port (4), and the corresponding water producing power unit is driven to produce water for output; And D4, discharging the concentrated water from the system through the concentrated water port (3).
8. The method of using a high packing density dual separation path ceramic composite membrane module system of claim 6, wherein the dual path collaborative separation comprises the steps of: Step S1, raw water enters a membrane shell (7) through a water inlet (1), and the water inlet rate is adjusted to enable the ratio of the effective water inlet volume to the water inlet rate in the membrane shell (7) to be set hydraulic retention time; S2, starting a first pressure pump (13) and a second pressure pump (16) to drive two water producing power units to produce water for output; S3, sewage in the membrane shell (7) is subjected to membrane filtration separation through a dual-path at the same time, wherein one path is that sewage permeates through a membrane wall of the (5) tubular ceramic membrane assembly and enters a (2) tubular membrane water producing port, and the other path is that sewage permeates through a membrane wall of the (6) hollow fiber ceramic membrane bundle and enters a (4) hollow fiber membrane water producing port, so that two water producing power units are respectively driven to produce water and output; And S4, discharging the concentrated water from the system through the concentrated water port (3).
9. The method of using a high packing density dual separation path ceramic composite membrane module system of claim 6, wherein the back flushing stage comprises the steps of: the method comprises the following steps of R1, stopping a water inlet flow of raw water through a water inlet (1), closing a first pressure pump (13) and a second pressure pump (16), and cutting off a water flow channel in a stable water production stage; The method comprises the steps of R2, connecting a back flush water source into a tubular membrane water producing port (2) and a hollow fiber membrane water producing port (4), starting a first pressure pump (13), driving the back flush water source to reversely penetrate through the membrane wall of a tubular ceramic membrane assembly (5) to enter a water inlet cavity, flushing pollutants attached to the outer wall of the tubular membrane, simultaneously starting a second pressure pump (16), driving the back flush water source to reversely penetrate through the membrane wall of a hollow fiber ceramic membrane bundle (6) to enter the water inlet cavity, flushing the pollutants attached to the outer wall of the fiber membrane bundle, and discharging back flush wastewater out of the system through a water concentration port (3); R3, synchronous back flushing or independent back flushing of the two water producing power units is realized by regulating and controlling the opening of the first pressure valve (14) and the second pressure valve (17), and when independent back flushing is performed, the first pressure pump (13) or the second pressure pump (16) is started as required to finish the corresponding water producing unit path flushing; And R4, after the back flushing is finished, closing a valve of a back flushing pipeline, starting a first pressure pump (13) and a second pressure pump (16) to purge for a short time, discharging back flushing wastewater remained in the membrane shell, and then recovering a water inlet flow of the water inlet (1) and switching back to the stable water production stage operation.
10. The method for using the ceramic composite membrane module system with the high packing density and the double separation paths according to claim 7-9, wherein the pressure ratio regulation and control range of the water production sides of the two water production power units is 1:5-5:1, and the single opening path I, the single opening path II or the cooperation operation of the two paths can be realized by adjusting the opening degree of the pressure valve of each path, so that the method is suitable for different pollutant separation requirements.

Description

Ceramic composite membrane module system with high packing density and double separation paths and use method Technical Field The invention relates to a double-path ceramic composite membrane component system and a use method thereof, belonging to the technical field of fluid membrane separation. Background The membrane separation technology is used as an efficient and energy-saving separation and purification means, and is widely applied to the fields of advanced water treatment, industrial wastewater recycling, biological medicine purification and the like. Ceramic membranes are preferred membrane materials under high-temperature, high-corrosion and high-solid-content systems by virtue of the advantages of good chemical stability, high mechanical strength, strong pollution resistance and the like. At present, the tubular ceramic membrane has excellent running stability in a complex feed liquid system by virtue of high mechanical strength and pollution resistance of a single-tube structure, can resist high-pressure impact and frequent chemical cleaning, and has longer service life than other membrane types. However, the membrane module is limited by the design of a hollow cavity of a single tube, and the membrane area in unit volume of the membrane module is small, so that the occupied area of equipment is large, the unit investment cost is high, and particularly in a large-scale industrial application scene, the low filling density is in outstanding contradiction with the compact and efficient engineering requirements. Researchers find that the fine membrane tow structure of the ceramic hollow fiber membrane can integrate a plurality of times of the effective membrane area of the tubular membrane in the same volume, and can theoretically greatly improve the treatment efficiency of unit volume. However, the ceramic hollow fiber membrane has the defect of weak mechanical strength, and the problems of broken filaments, compaction of membrane bundles and the like are easy to occur in a high-pressure or high-solid material liquid system, so that the ceramic hollow fiber membrane cannot be directly used for complex working conditions instead of a tubular ceramic membrane. In the prior art, although simple structural improvement is tried, only parameter optimization of a single membrane is remained, a great breakthrough of high packing density of a ceramic membrane is not realized, and system design is not carried out on fluid distribution and filtration paths of a composite structure. Therefore, there is a need to provide a ceramic composite membrane module system with high packing density and dual separation paths and a method of using the same to solve the above-mentioned problems. Disclosure of Invention To address the above-described problems, a ceramic composite membrane module system and method of use that provides a high packing density dual separation path is provided below in a brief summary of the invention in order to provide a basic understanding of some aspects of the invention. It should be understood that this summary is not an exhaustive overview of the invention. It is not intended to identify key or critical elements of the invention or to delineate the scope of the invention. The technical scheme of the invention is as follows: The ceramic composite membrane component system with high packing density and double separation paths comprises a water inlet and a second water producing port which are respectively arranged on the upper side and the lower side of a membrane shell, wherein an upper filler, an upper sealing gasket, a lower sealing gasket and a lower filler are sequentially arranged in the membrane shell from top to bottom; a first water producing port is arranged on the side wall of the membrane shell between the two sealing gaskets, and a water concentrating port is arranged on the side wall of the membrane shell between the sealing gasket at the lower side and the filler at the lower side; The upper end and the lower end of the tubular ceramic membrane component are connected with sealing gaskets at the lower side; The upper end of the hollow fiber ceramic membrane bundle is connected with the filler at the upper side, and the lower end of the hollow fiber ceramic membrane bundle passes through the tubular ceramic membrane assembly to be connected with the filler at the lower side. The water outlet valve is characterized by further comprising a first check valve arranged on a connecting pipeline between one end of the first pressure pump and the first water outlet, and a first pressure valve arranged at the other end of the first pressure pump; and a second check valve is arranged on a connecting pipeline between one end of the second pressure pump and the second water producing port, and a second pressure valve is arranged at the other end of the second pressure pump. The membrane shell is provided with split upper and lower end covers, filler is filled in the connecting part of the