A multi-mode performance detection device for hollow fiber membranes and its application method

Abstract

The present invention provides a multi-mode performance detection device for hollow fiber membranes and an application method thereof. The device mainly includes a water supply and pressure regulating system, a multi-mode detection component, and a filtered water measurement module. The multi-mode detection component is mainly composed of a multi-way pipe for providing a detection environment and a membrane filament fixing device for fixing membrane filaments and collecting filtered water. By selectively and quickly connecting the membrane filament fixing device to any one of the through-port inlets of the multi-way pipe, the remaining through-port inlets can be used as the inlet and outlet of the test environment or be closed respectively. According to the different selections of the through-port inlet to which the membrane filament fixing device is quickly connected, and the regulation of the inlet flow rate and water pressure of the water supply and pressure regulating system, the measurement and evaluation of cross-flow filtration, dead-end filtration, gravity-driven and other modes of the hollow fiber membrane can be freely selected and realized in the same detection device, as well as the application test of the membrane bioreactor and other functions.

Description

Technical Field

[0001] The present invention relates to the technical field of hollow fiber membrane detection, and particularly to a multi-mode performance detection device for hollow fiber membranes and an application method thereof. Background Art

[0002] Due to advantages such as small floor area, easy cleaning, and high packing density, hollow fiber membranes have been widely used in industries such as drinking water, urban sewage, food and beverage in China, and the market demand is also increasing continuously. Currently, the main preparation methods of hollow fiber membranes are non-solvent phase inversion method, thermally induced phase separation method, and melt spinning method. By adjusting the polymer composition, coagulation bath conditions, and spinning parameters, microfiltration, ultrafiltration, and nanofiltration hollow fiber membranes with different micro-nano structures can be obtained to meet the multi-field applications of hollow fiber membranes. However, during the production process of hollow fiber membranes, it is necessary to timely control the quality of the membranes and evaluate the separation performance of the membrane filaments, especially the three major indicators of pure water flux, pollutant interception rate, and anti-fouling characteristics, in order to produce hollow fiber membranes with more stable performance. However, in actual engineering applications, hollow fiber membranes also need to adapt to the performance release under different water flow patterns, such as scenarios like tubular cross-flow filtration, dead-end filtration, gravity-driven filtration, and membrane bioreactor (MBR) constant pressure suction filtration. Therefore, the rapid detection of the multi-scenario and multi-functional separation performance of hollow fiber membranes has become the key to accelerating the production and expanding the application of membranes. The integration, portable structure, small size, controllable parameters, and multi-functionality of membrane filament performance detection equipment are boosters for promoting the explosive development of the membrane industry, which is conducive to quickly grasping the real-scenario application performance indicators of hollow fiber membranes and providing real data for the research and development of specific properties of hollow fiber membranes. In particular, the gravity-driven filtration of hollow fiber membranes is suitable for the purification of drinking water in remote rural areas and the zero-energy treatment of urban rainwater collection for green plant irrigation, providing technical support for the construction of new cities / villages.

[0003] Although there are already hollow fiber membrane performance detection devices nowadays (such as Chinese invention patents CN114130205A and CN103240001A), they all have disadvantages such as complex structure, difficulty in modularization, and poor parameter controllability. At the same time, the testing scenarios of these devices are single and insufficient to cope with the diversified scenario applications of hollow fiber membranes. When multiple performance indicators need to be evaluated, usually a combination of multiple detection devices is used, such as the combined use of the constant flow rate (constant flow) of a drinking water plant and a membrane bioreactor and the external pressure type (constant pressure) of gravity drive. However, obviously, this not only greatly increases the equipment cost for the performance detection of hollow fiber membranes, but also the combination of multiple devices increases the setup difficulty and space requirements of the testing work, making it difficult to provide technical support for water treatment and purification in remote areas conveniently and quickly.

[0004] Therefore, in order to realize the multi-functional scenario application of the hollow fiber membrane performance rapid testing equipment and make up for the singularity of the testing equipment, a new and convenient hollow fiber membrane performance detection device is urgently needed. Summary of the Invention

[0005] In view of the problems raised by the above-mentioned prior art, the present invention provides a multi-mode performance detection device for hollow fiber membranes and its application method. This device can not only quickly obtain various performance indicators of hollow fiber membranes, but also has the advantages of small floor area, simple structure, easy operation, low cost, etc., which is of great significance for promoting the vigorous development of the membrane industry.

[0006] To achieve the above object, the present invention adopts a technical solution composed of the following technical measures.

[0007] On the one hand, the present invention provides a multi-mode performance detection device for hollow fiber membranes, which mainly includes a water supply and pressure regulating system, a multi-mode detection component and a filtered water measurement module.

[0008] The water supply and pressure regulating system can output an outlet water flow with an adjustable flow rate in the range of 0.01 - 3.0 L / min and an adjustable water pressure in the range of 0 - 1.60 MPa through a water pump and a flow valve.

[0009] The multi-mode detection component is mainly composed of a multi-way pipe for providing a detection environment and a membrane filament fixing device for providing membrane filament fixing and filtered water collection. The multi-way pipe is at least a three-way pipe and has a long pipe structure. At both ends of the long pipe structure, there are respectively provided through pipe inlets, and at least one through pipe inlet is provided on the side edge of the long pipe structure at a distance of 1 / 10 - 1 / 2 of the length of the long pipe structure from either end, forming a structure of at least three-way; quick-connect female heads are provided on the through pipe inlets; at least one through pipe inlet in the multi-way pipe serves as a test environment water inlet and is connected to the water supply and pressure regulating system to introduce the outlet water flow; at least one through pipe inlet in the multi-way pipe serves as a test environment water outlet and is connected to the outside.

[0010] The membrane filament fixing device is mainly composed of a membrane filament filtered water collection pipe and a quick-connect male head, and the membrane filament filtered water collection pipe can pass through the quick-connect female head and extend into the interior of the multi-way pipe. The membrane filament filtered water collection pipe has a long pipe structure, and a membrane filament can be fixedly connected to one end thereof, and a quick-connect male head is provided at the opposite end.

[0011] The filtered water measurement module is connected to the membrane filament filtered water collection pipe, and measures the amount of water filtered by the membrane filament through a conventional volume or weight measurement device.

[0012] The main inventive point of the present invention is to propose a novel multi-mode detection component. By selectively and quickly connecting the membrane filament fixing device to any inlet of a multi-way pipe, the other inlet of the multi-way pipe can be used as the inlet of the test environment water and the outlet of the test environment water respectively or be closed. According to the different selections of the membrane filament fixing device for quickly connecting to the inlet of the multi-way pipe and the regulation of the inlet water flow and water pressure of the test environment, the cross-flow filtration, dead-end filtration, gravity drive and other modes of measurement and evaluation of the hollow fiber membrane can be freely selected and realized on the same detection device, and functions such as the application test of the membrane bioreactor can be carried out.

[0013] In this article, the water supply pressure regulating system can output an outlet water flow with an adjustable flow rate in the range of 0.01 - 3.00 L / min and an adjustable water pressure in the range of 0 - 1.60 MPa through a water pump and a flow valve. It can be composed of a water pump and a flow valve commonly used in the technical field connected in combination through a pipeline. The water pump extracts test water and outputs it into the pipeline equipped with the flow valve, and the flow valve adjusts the water flow rate and water pressure to output an outlet water flow with appropriate water flow rate and water pressure; or it can be other water supply pressure regulating systems commonly known in the technical field, as long as it can output an outlet water flow with an adjustable flow rate in the range of 0.01 - 3.00 L / min and an adjustable water pressure in the range of 0 - 1.6 MPa, it can be used as the water supply pressure regulating system described in the present invention.

[0014] In one technical solution, in order to more conveniently adjust the water flow rate and water pressure, a pipeline pressure gauge is further included in the water supply pressure regulating system, and the flow valve is a flow valve with a flow display function. Further preferably, the pipeline pressure gauge is a shock-resistant pressure gauge or a vacuum pressure gauge, and the flow valve is a digital display flow valve.

[0015] In one preferred technical solution, in order to facilitate the movement and use of the test device provided by the present invention, the water supply pressure regulating system can be placed and installed in a housing as a whole. A water pump inlet and a test water outlet are provided on the housing. The inlet end of the water pump is communicated with the water pump inlet, and the test water outlet can output the adjusted outlet water flow. Generally speaking, the water pump inlet and the test water outlet are structures convenient for pipelines to pass through or be connected.

[0016] Based on the above preferred technical solution, the water supply pressure regulating system can be placed and installed in a housing as a whole. A conventional fixing member for fixing the multi-mode detection component is also provided on the housing, for example, it can be fixed by any conventional fixing member such as a fixing groove, a binding band, a fixing socket / plug, a magnetic attraction, a clamping member, etc., and a fitting corresponding to the above fixing member is provided when fixing the multi-mode detection component.

[0017] In this article, the test water used is the conventional test water in this technical field, such as deionized water, tap water, polluted water source, or the extraction of natural water bodies (such as rivers, lakes, groundwater, etc.).

[0018] In one of the preferred technical solutions, in order to facilitate water resource conservation, the test water is recycled, for example, collecting the test water discharged by the multi-mode detection component. Specifically, the water supply pressure regulating system further includes a circulating water tank filled with test water. The test water discharged by the multi-mode detection component enters the circulating water tank through the circulating water tank inlet pipe, and the water pump extracts the test water in the circulating water tank through the circulating water tank outlet pipe; further, a flow valve is provided on the circulating water tank inlet pipe to adjust the water flow pressure in the multi-pass pipe.

[0019] In this article, the membrane filament filtered water collection pipe is of a long pipe structure, and a membrane filament can be fixedly connected to one end thereof. This fixed connection method is common knowledge in this technical field, that is, while isolating the test water in the multi-pass pipe from directly entering the membrane filament filtered water collection pipe, the water filtered by the membrane filament to be tested is collected.

[0020] In one of the technical solutions, the method of fixedly connecting one end of the membrane filament filtered water collection pipe to the membrane filament is specifically to bend the membrane filament into a U shape, and then insert both ends of the membrane filament into the inside of one end of the membrane filament filtered water collection pipe to ensure that the filtered water of the membrane filament enters the membrane filament filtered water collection pipe, and then seal and fix the membrane filament at this end while preventing the test water in the multi-pass pipe from directly entering the membrane filament filtered water collection pipe. For example, an adhesive can be used to seal and fix the membrane filament.

[0021] In one of the technical solutions, the method of fixedly connecting one end of the membrane filament filtered water collection pipe to the membrane filament is specifically to seal one end of the membrane filament, and insert the other end into the inside of one end of the membrane filament filtered water collection pipe to ensure that the filtered water of the membrane filament enters the membrane filament filtered water collection pipe, and then seal and fix the membrane filament at this end while preventing the test water in the multi-pass pipe from directly entering the membrane filament filtered water collection pipe. For example, an adhesive can be used to seal and fix the membrane filament.

[0022] In one of the preferred technical solutions, for the more convenient replacement of the test membrane filament and the sealing and fixing operation, one end of the membrane filament filtered water collection pipe is a flared opening or is connected with a funnel-shaped mounting nozzle, but it is necessary to ensure that it can pass through the female quick connector and extend into the multi-pass pipe.

[0023] In one of the preferred technical solutions, in order to miniaturize the overall equipment, the multi-pass pipe is of a long pipe structure, 10.0 - 100.0 cm in length and 1.0 - 15.0 cm in width. The pipe inlet on its side is an outward extending structure, 2.0 - 15.0 cm in length and 1.0 - 15.0 cm in width.

[0024] In this text, the filtered water measurement module is connected to the membrane filament filtered water collection pipe, and the amount of water filtered by the membrane filaments is measured by conventional volume or weight measurement devices. For example, the amount of water filtered by the membrane filaments per unit time is measured by a precision electronic balance.

[0025] In one preferred technical solution, the hollow fiber membrane multi-mode performance detection device further includes a conventional electronic control system. The electronic control system calculates by collecting data from the filtered water measurement module and using the well-known hollow fiber membrane performance evaluation formula in the art. For example, this function is achieved through a computer and a data transmission line connected to the filtered water measurement module. More preferably, the electronic control system can also collect data from the digital display flow valve and the pipeline pressure gauge, thus facilitating the evaluation calculation more conveniently.

[0026] On the other hand, the present invention also provides an application method of the above-mentioned hollow fiber membrane multi-mode performance detection device, which mainly includes the following steps:

[0027] When it is necessary to evaluate the dead-end filtration performance of the hollow fiber membrane, adjust the water supply pressure regulating system to output an outlet water flow with a water flow rate of 0.1 - 3.00 L / min and a water pressure of 0.01 - 1.6 MPa; select at least one through-pipe inlet on the side of the multi-way pipe and any other through-pipe inlet as the test environment water inlet and the test environment water outlet respectively, so as to form a water flow channel with the shortest distance between the test environment water inlet and the test environment water outlet inside the multi-way pipe; after fixing the membrane filaments to be tested at one end of the membrane filament filtered water collection pipe, extend the membrane filament filtered water collection pipe into the through-pipe inlet of the multi-way pipe far from the water flow channel, and use the quick-connect male head and the quick-connect female head to realize the connection and fixation of the membrane filament filtered water collection pipe and the multi-way pipe. Then, turn on the water pump of the water supply pressure regulating system, and measure the amount of water filtered by the membrane filaments by using the filtered water measurement module; the through-pipe inlet far from the water flow channel should ensure that the test membrane filaments do not extend into the water flow channel after the membrane filament filtered water collection pipe is connected and fixed.

[0028] When it is necessary to evaluate the cross-flow filtration performance of the hollow fiber membrane, adjust the water supply and pressure regulating system to output an effluent water flow with a water flow rate of 0.1 - 3.00 L / min and a water pressure of 0.01 - 1.2 MPa; select any two through-pipe inlets of the multi-way pipe as the test environment inlet and the test environment outlet respectively, so as to form a water flow channel with the shortest distance between the test environment inlet and the test environment outlet inside the multi-way pipe; after fixing the membrane filaments to be tested at one end of the membrane filament filtered water collection pipe, extend the membrane filament filtered water collection pipe into the through-pipe inlet of the multi-way pipe close to the water flow channel, and use the quick-connect male head and the quick-connect female head to realize the connection and fixation of the membrane filament filtered water collection pipe and the multi-way pipe. Subsequently, turn on the water pump of the water supply and pressure regulating system, and use the filtered water measurement module to measure the amount of water filtered by the membrane filaments; the through-pipe inlet close to the water flow channel should ensure that after the membrane filament filtered water collection pipe is connected and fixed, the test membrane filaments extend into the water flow channel;

[0029] When it is necessary to evaluate the gravity-driven performance of the hollow fiber membrane, adjust the water supply and pressure regulating system to output an effluent water flow with a water flow rate of 0.01 - 3.00 L / min and a water pressure of 0 MPa; select any one through-pipe inlet on the side of the multi-way pipe as the test environment inlet, place the multi-way pipe vertically in a way that the long pipe structure is perpendicular to the horizontal line, and after vertical placement, use any through-pipe inlet higher than the test environment inlet as the test environment outlet and connect it to the outside air at the same time, so as to form an adjustable water level inside the multi-way pipe by introducing water from the test environment inlet; after fixing the membrane filaments to be tested at one end of the membrane filament filtered water collection pipe, extend the membrane filament filtered water collection pipe into the through-pipe inlet below the test environment inlet of the multi-way pipe, and use the quick-connect male head and the quick-connect female head to realize the connection and fixation of the membrane filament filtered water collection pipe and the multi-way pipe. Subsequently, turn on the water pump of the water supply and pressure regulating system, and use the filtered water measurement module to measure the amount of water filtered by the membrane filaments; the height distance between the test environment inlet and the test environment outlet should be greater than the height of the membrane filaments to be tested after fixation;

[0030] When it is necessary to evaluate the performance of a hollow fiber membrane bioreactor, adjust the water supply pressure regulating system to output an effluent water flow with a water flow rate of 0.01 - 3.00 L / min and a water pressure of 0 MPa; select any one of the through-pipe inlets on the side of the multi-way pipe as the test environment inlet, place the multi-way pipe vertically in a way that the long pipe structure is perpendicular to the horizontal line, and after vertical placement, use any through-pipe inlet above the test environment inlet as the test environment outlet and connect it to the outside air at the same time, so as to form an adjustable water level inside the multi-way pipe by feeding water from the test environment inlet; after fixing the membrane filaments to be tested at one end of the membrane filament filtered water collection pipe, insert the membrane filament filtered water collection pipe into the through-pipe inlet below the test environment inlet of the multi-way pipe, and use a quick-connect male head and a quick-connect female head to realize the connection and fixation of the membrane filament filtered water collection pipe and the multi-way pipe. Then, turn on the water pump of the water supply pressure regulating system and measure the amount of water filtered by the membrane filaments using the filtered water measurement module; the height distance between the test environment inlet and the test environment outlet should be greater than the height of the membrane filaments to be tested after fixation; install an aeration nozzle connected to an aeration pump inside the multi-way pipe, and add conventional fillers for evaluating the performance of the membrane bioreactor inside the multi-way pipe.

[0031] In one of the preferred technical solutions, in order to miniaturize the equipment as a whole and make it more convenient to switch and install the multi-way pipe in multiple modes, performance evaluation tests are carried out on the hollow fiber membranes with conventional specifications on the current market, and at the same time, a reference technical solution is provided to better illustrate the above application method:

[0032] The multi-way pipe is a three-way pipe and has a long pipe structure. Through-pipe inlets are respectively opened at both ends of the long pipe structure, and a through-pipe inlet is opened on the side of the long pipe structure at a distance of 1 / 5 - 2 / 5 of the length of the long pipe structure from either end, forming a three-way structure; quick-connect female heads are provided on the through-pipe inlets; the multi-way pipe has a long pipe structure, with a length of 10.0 - 100.0 cm and a width of 1.0 - 15.0 cm. The through-pipe inlet on its side is an outward-extending structure, with a length of 2.0 - 15.0 cm and a width of 1.0 - 15.0 cm.

[0033] When it is necessary to evaluate the dead-end filtration performance of the hollow fiber membrane, adjust the water supply pressure regulating system to output an effluent water flow with a water flow rate of 0.1 - 3.00 L / min and a water pressure of 0.01 - 1.6 MPa; place the multi-way pipe vertically with the long pipe structure perpendicular to the horizontal line and the inlet of the side pipe on the upper side, and select the inlet of the side pipe on the multi-way pipe and the other inlet at the uppermost part as the test environment inlet and the test environment outlet respectively; after fixing the tested membrane filaments at one end of the membrane filament filtered water collection pipe, insert the membrane filament filtered water collection pipe into the inlet of the lowermost pipe of the multi-way pipe, and use the quick-connect male and female connectors to fix the connection between the membrane filament filtered water collection pipe and the multi-way pipe. Then, turn on the water pump of the water supply pressure regulating system, and use the filtered water measurement module to measure the amount of water filtered by the membrane filaments;

[0034] When it is necessary to evaluate the cross-flow filtration performance of the hollow fiber membrane, adjust the water supply pressure regulating system to output an effluent water flow with a water flow rate of 0.1 - 3.00 L / min and a water pressure of 0.01 - 1.2 MPa; place the multi-way pipe vertically with the long pipe structure perpendicular to the horizontal line and the inlet of the side pipe on the lower side, and select the inlet of the side pipe on the multi-way pipe and the other inlet at the uppermost part as the test environment inlet and the test environment outlet respectively; after fixing the tested membrane filaments at one end of the membrane filament filtered water collection pipe, insert the membrane filament filtered water collection pipe into the inlet of the lowermost pipe of the multi-way pipe, and use the quick-connect male and female connectors to fix the connection between the membrane filament filtered water collection pipe and the multi-way pipe. Then, turn on the water pump of the water supply pressure regulating system, and use the filtered water measurement module to measure the amount of water filtered by the membrane filaments;

[0035] When it is necessary to evaluate the gravity-driven performance of the hollow fiber membrane, adjust the water supply pressure regulating system to output an effluent water flow with a water flow rate of 0.01 - 3.00 L / min and a water pressure of 0 MPa; place the multi-way pipe vertically with the long pipe structure perpendicular to the horizontal line and the inlet of the side pipe on the upper side, select the inlet of the side pipe on the multi-way pipe as the test environment inlet, and select the inlet at the uppermost part of the multi-way pipe as the test environment outlet and connect it to the outside air at the same time, so as to form an adjustable water level inside the multi-way pipe by introducing water from the test environment inlet; after fixing the tested membrane filaments at one end of the membrane filament filtered water collection pipe, insert the membrane filament filtered water collection pipe into the inlet of the lowermost pipe of the multi-way pipe, and use the quick-connect male and female connectors to fix the connection between the membrane filament filtered water collection pipe and the multi-way pipe. Then, turn on the water pump of the water supply pressure regulating system, and use the filtered water measurement module to measure the amount of water filtered by the membrane filaments;

[0036] When evaluating the performance of a membrane bioreactor with hollow fiber membranes, adjust the water supply pressure regulating system to output an effluent water flow with a flow rate of 0.01 - 3.00 L / min and a water pressure of 0 MPa; place the multi-pass pipe vertically with its long pipe structure perpendicular to the horizontal line, and the inlet of the side pipe on the side is at the top. Select the inlet of the side pipe on the multi-pass pipe as the inlet of the test environment, and select the inlet of the top pipe on the multi-pass pipe as the outlet of the test environment and connect it to the outside air at the same time, so as to form an adjustable water level inside the multi-pass pipe by introducing water from the inlet of the test environment; after fixing the membrane filaments to be tested at one end of the membrane filament filtered water collection pipe, extend the membrane filament filtered water collection pipe into the inlet of the bottom pipe of the multi-pass pipe, and use the quick-connect male head and quick-connect female head to realize the connection and fixation of the membrane filament filtered water collection pipe and the multi-pass pipe. Then turn on the water pump of the water supply pressure regulating system, and use the filtered water measurement module to measure the amount of water filtered by the membrane filaments; install an aeration nozzle connected to the aeration pump in the multi-pass pipe, and add conventional fillers for evaluating the performance of the membrane bioreactor in the multi-pass pipe.

[0037] In this text, the terms "above", "below", "topmost", and "lowermost" describe the height orientation when the multi-pass pipe is placed vertically with its long pipe structure perpendicular to the horizontal line.

[0038] In one of the preferred technical solutions, when evaluating the dead-end filtration and cross-flow filtration performance of the hollow fiber membrane, the outlet of the test environment is connected to the circulation pool through the circulation pool inlet pipe, and a flow valve is provided on the circulation pool inlet pipe to adjust the water pressure inside the multi-pass pipe.

[0039] In this text, the aeration nozzle connected to the aeration pump and the conventional fillers for evaluating the performance of the membrane bioreactor are conventional choices in the field for evaluating the performance of the membrane bioreactor and are used to domesticate microorganisms.

[0040] Specification Drawings

[0041] Figure 1 It is a schematic structural diagram of a multi-mode performance detection device for hollow fiber membranes in Embodiment 1 of the present invention.

[0042] Figure 2 It is a schematic structural diagram of the water supply pressure regulating system in a multi-mode performance detection device for hollow fiber membranes in Embodiment 1 of the present invention.

[0043] Figure 3 It is a schematic structural diagram of the multi-mode detection component in a multi-mode performance detection device for hollow fiber membranes in Embodiment 1 of the present invention.

[0044] Figure 4 It is a schematic structural diagram of the membrane filament fixing device in a multi-mode performance detection device for hollow fiber membranes in Embodiment 1 of the present invention.

[0045] Figure 5 It is a schematic structural diagram of the membrane filament fixing device for fixing the U-shaped membrane filament in the hollow fiber membrane multi-mode performance detection device of Embodiment 1 of the present invention.

[0046] Figure 6 It is a schematic structural diagram of the outer shell of the hollow fiber membrane multi-mode performance detection device of Embodiment 2 of the present invention.

[0047] Figure 7 It is a schematic structural diagram of the outer shell of the hollow fiber membrane multi-mode performance detection device of Embodiment 3 of the present invention.

[0048] Figure 8 It is a schematic application method diagram for evaluating the dead-end filtration performance of the hollow fiber membrane in Application Example 1 of the present invention.

[0049] Figure 9 It is a schematic application method diagram for evaluating the cross-flow filtration performance of the hollow fiber membrane in Application Example 2 of the present invention.

[0050] Figure 10 It is a schematic application method diagram for evaluating the gravity-driven performance of the hollow fiber membrane in Application Example 3 of the present invention.

[0051] Figure 11 It is a schematic application method diagram for evaluating the membrane bioreactor performance of the hollow fiber membrane in Application Example 4 of the present invention. Detailed implementation manners

[0052] To further understand the present invention, the preferred implementation manners of the present invention are described below in conjunction with embodiments. However, it should be understood that these descriptions are only for further explaining the features and advantages of the present invention, rather than limiting the claims of the invention. Those skilled in the art can draw on the content of this article and appropriately modify the process parameters to achieve. It should be particularly noted that all similar substitutions and modifications are obvious to those skilled in the art, and they are all regarded as included in the present invention. The methods and applications of the present invention have been described through preferred embodiments, and those skilled in the art can obviously make changes or appropriate changes and combinations to the methods and applications described herein without departing from the content, spirit and scope of the present invention to implement and apply the technology of the present invention. Although it is believed that those of ordinary skill in the art are fully aware of the following terms, the following definitions are still stated to help explain the subject matter disclosed by the present invention.

[0053] On the one hand, the present invention provides a hollow fiber membrane multi-mode performance detection device, mainly including a water supply and pressure regulating system, a multi-mode detection component and a filtered water measurement module.

[0054] The water supply pressure regulating system can output a water flow with an adjustable flow rate in the range of 0.01 - 3.0 L / min and an adjustable water flow pressure in the range of 0 - 1.60 MPa through a water pump and a flow valve.

[0055] The multi-mode detection component is mainly composed of a multi-pass pipe for providing a detection environment and a membrane filament fixing device for providing membrane filament fixing and filtered water collection. The multi-pass pipe is at least a three-way pipe and has a long pipe structure. There are pipe access openings at both ends of the long pipe structure. At least one pipe access opening is provided on the side of the long pipe structure at a distance of 1 / 10 - 1 / 2 of the length of the long pipe structure from either end, forming a structure of at least three-way. Quick-connect female heads are provided on the pipe access openings. At least one pipe access opening in the multi-pass pipe serves as an inlet for the test environment and is connected to the water supply pressure regulating system to introduce the water flow. At least one pipe access opening in the multi-pass pipe serves as an outlet for the test environment and is connected to the outside.

[0056] The membrane filament fixing device is mainly composed of a membrane filament filtered water collection pipe and a quick-connect male head. The membrane filament filtered water collection pipe can pass through the quick-connect female head and extend into the interior of the multi-pass pipe. The membrane filament filtered water collection pipe has a long pipe structure. One end of it can be fixedly connected to the membrane filament, and a quick-connect male head is provided at the opposite end.

[0057] The filtered water measurement module is connected to the membrane filament filtered water collection pipe, and the amount of water filtered by the membrane filament is measured through conventional volume or weight measurement equipment.

[0058] The main inventive point of the present invention is to propose a new type of multi-mode detection component. By selectively quickly connecting the membrane filament fixing device to any pipe access opening on the multi-pass pipe, the remaining pipe access openings can be used as the inlet for the test environment and the outlet for the test environment respectively or be closed. According to the different selections of the pipe access opening to which the membrane filament fixing device is quickly connected, and the regulation of the inlet flow rate and water flow pressure of the test environment, the measurement and evaluation of cross-flow filtration, dead-end filtration, gravity-driven and other modes of the hollow fiber membrane, and the application test of the membrane bioreactor can be freely selected and realized on the same detection device.

[0059] In this text, the water supply pressure regulating system can output a water flow with an adjustable flow rate in the range of 0.01 - 3.00 L / min and an adjustable water pressure in the range of 0 - 1.60 MPa. It can be composed of a water pump and a flow valve connected in combination through pipelines in the conventional use in this technical field. The water pump pumps the test water and outputs it into the pipeline equipped with the flow valve, and the flow valve adjusts the water flow rate and water pressure to output a water flow with a suitable water flow rate and water pressure. It can also be other water supply pressure regulating systems that are conventionally known in this technical field, as long as they can output a water flow with an adjustable flow rate in the range of 0.01 - 3.00 L / min and an adjustable water pressure in the range of 0 - 1.6 MPa, they can be used as the water supply pressure regulating system described in the present invention.

[0060] In one of the embodiments, in order to more conveniently adjust the water flow rate and water pressure, a pipeline pressure gauge is further included in the water supply pressure regulating system. The flow valve is a flow valve with a flow rate display function. Further preferably, the pipeline pressure gauge is a shock-resistant pressure gauge or a vacuum pressure gauge, and the flow valve is a digital display flow valve.

[0061] In one of the preferred embodiments, in order to facilitate the movement and use of the test device provided by the present invention, the water supply pressure regulating system can be placed and installed in a housing as a whole. On the housing, a water pump inlet and a test water outlet are provided. The inlet end of the water pump is communicated with the water pump inlet, and the test water outlet can output the adjusted water flow. Generally speaking, the water pump inlet and the test water outlet are structures that facilitate the passing through or connection of pipelines.

[0062] Based on the above preferred embodiment, the water supply pressure regulating system can be placed and installed in a housing as a whole. On the housing, there are also conventional fixing parts for fixing the multi-mode detection component, such as fixing through any conventional fixing parts such as fixing grooves, straps, fixing sockets / plugs, magnetic attraction, clamping parts, etc., and there are accessories corresponding to the above fixing parts for fixing the multi-mode detection component.

[0063] In this text, the test water is the conventional test water in this technical field, such as deionized water, tap water, polluted water source, or natural water bodies (such as rivers, lakes, groundwater, etc.) are extracted.

[0064] In one of the preferred embodiments, for the convenience of saving water resources, the test water is recycled. For example, the test water discharged by the multi-mode detection component is collected. Specifically, the water supply and pressure regulating system further includes a circulating water tank filled with test water. The test water discharged by the multi-mode detection component enters the circulating water tank through the circulating water tank inlet pipe, and the water pump extracts the test water in the circulating water tank through the circulating water tank outlet pipe. Further, a flow valve is provided on the circulating water tank inlet pipe to balance the water flow pressure in the multi-pass pipe.

[0065] In this article, the membrane filament filtered water collection pipe is a long pipe structure, and a membrane filament can be fixedly connected to one end thereof. The fixed connection method is common knowledge in the technical field, that is, while isolating the test water in the multi-pass pipe from directly entering the membrane filament filtered water collection pipe, the filtered water of the tested membrane filament is collected.

[0066] In one of the embodiments, the method of fixedly connecting one end of the membrane filament filtered water collection pipe to the membrane filament is specifically to bend the membrane filament into a U shape, and then insert both ends of the membrane filament into the inside of one end of the membrane filament filtered water collection pipe to ensure that the filtered water of the membrane filament enters the membrane filament filtered water collection pipe. Then, this end is sealed and the membrane filament is fixed to prevent the test water in the multi-pass pipe from directly entering the membrane filament filtered water collection pipe. For example, an adhesive can be used for sealing and fixing the membrane filament. Generally speaking, the overall length of the conventional membrane filament after bending (measured in the bent state) is usually 2.0 - 40.0 cm.

[0067] In one of the embodiments, the method of fixedly connecting one end of the membrane filament filtered water collection pipe to the membrane filament is specifically to seal one end of the membrane filament, and insert the other end into the inside of one end of the membrane filament filtered water collection pipe to ensure that the filtered water of the membrane filament enters the membrane filament filtered water collection pipe. Then, this end is sealed and the membrane filament is fixed to prevent the test water in the multi-pass pipe from directly entering the membrane filament filtered water collection pipe. For example, an adhesive can be used for sealing and fixing the membrane filament. Generally speaking, the overall length of the conventional membrane filament is usually 2.0 - 80.0 cm.

[0068] In one of the preferred embodiments, for the more convenient replacement of the test membrane filament and the sealing and fixing operation, one end of the membrane filament filtered water collection pipe is a flared opening or is connected with a funnel-shaped mounting nozzle, but it is necessary to ensure that it can pass through the female quick connector and extend into the multi-pass pipe.

[0069] In one of the preferred embodiments, for the overall miniaturization of the device, the multi-pass pipe is a long pipe structure, 10.0 - 100.0 cm in length, 1.0 - 15.0 cm in width, and the pipe inlet on its side is an outward extending structure, 2.0 - 15 cm in length and 1.0 - 15.0 cm in width.

[0070] In one preferred embodiment, the multi-mode detection components can be provided in multiple groups and utilize the same water supply pressure regulating system simultaneously.

[0071] In this text, the filtered water measurement module is communicated with the membrane filament filtered water collection pipe, and the amount of water filtered by the membrane filaments is measured by conventional volume or weight measurement equipment. For example, the amount of water filtered by the membrane filaments per unit time is measured by a precision electronic balance.

[0072] In one preferred embodiment, the hollow fiber membrane multi-mode performance detection device further includes a conventional electric control system. The electric control system calculates by collecting the data of the filtered water measurement module and using the well-known hollow fiber membrane performance evaluation formula in the art. For example, this function is achieved through a computer and a data transmission line connected to the filtered water measurement module. More preferably, the electric control system can also collect the data of the digital display flow valve and the pipeline pressure gauge, so as to facilitate the evaluation calculation more conveniently.

[0073] In one embodiment, the links involving the circulation of test water among the water supply pressure regulating system, the multi-mode detection components and the filtered water measurement module are carried out according to the conventional pipeline connection methods in the art, preferably semi-rigid hoses, such as PE pipes.

[0074] On the other hand, the present invention also provides an application method of the above-mentioned hollow fiber membrane multi-mode performance detection device, which mainly includes the following steps:

[0075] When it is necessary to evaluate the dead-end filtration performance of the hollow fiber membrane, adjust the water supply pressure regulating system to output an outlet water flow with a water flow rate of 0.1 - 3.00 L / min and a water pressure of 0.01 - 1.6 MPa; select at least one through-pipe inlet on the side of the multi-way pipe and any other through-pipe inlet as the test environment water inlet and the test environment water outlet respectively, so as to form the shortest water flow path from the test environment water inlet to the test environment water outlet inside the multi-way pipe; after fixing the membrane filaments to be tested at one end of the membrane filament filtered water collection pipe, extend the membrane filament filtered water collection pipe into the through-pipe inlet of the multi-way pipe far from the water flow path, and use the quick-connect male head and the quick-connect female head to realize the connection and fixation of the membrane filament filtered water collection pipe and the multi-way pipe. Then, turn on the water pump of the adjusted water supply pressure regulating system, and measure the amount of water filtered by the membrane filaments by using the filtered water measurement module; the through-pipe inlet far from the water flow path should ensure that after the membrane filament filtered water collection pipe is connected and fixed, the tested membrane filaments do not extend into the water flow path.

[0076] When it is necessary to evaluate the cross-flow filtration performance of the hollow fiber membrane, adjust the water supply and pressure regulating system to output an effluent water flow with a water flow rate of 0.1 - 3.00 L / min and a water pressure of 0.01 - 1.2 MPa; select any two through-pipe inlets of the multi-way pipe as the test environment inlet and the test environment outlet respectively, so as to form the shortest water flow channel between the test environment inlet and the test environment outlet inside the multi-way pipe; after fixing the tested membrane filaments at one end of the membrane filament filtered water collection pipe, insert the membrane filament filtered water collection pipe into the through-pipe inlet of the multi-way pipe close to the water flow channel, and use the quick-connect male head and the quick-connect female head to realize the connection and fixation of the membrane filament filtered water collection pipe and the multi-way pipe. Subsequently, turn on the water pump of the water supply and pressure regulating system, and use the filtered water measurement module to measure the amount of water filtered by the membrane filaments; the through-pipe inlet close to the water flow channel should ensure that after the membrane filament filtered water collection pipe is connected and fixed, the tested membrane filaments extend into the water flow channel;

[0077] When it is necessary to evaluate the gravity-driven performance of the hollow fiber membrane, adjust the water supply and pressure regulating system to output an effluent water flow with a water flow rate of 0.01 - 3.00 L / min and a water pressure of 0 MPa; select any one through-pipe inlet on the side of the multi-way pipe as the test environment inlet, place the multi-way pipe vertically in a long-pipe structure perpendicular to the horizontal line, and after vertical placement, use any through-pipe inlet higher than the test environment inlet as the test environment outlet and connect it to the outside air at the same time, so as to form an adjustable water level by introducing water from the test environment inlet inside the multi-way pipe; after fixing the tested membrane filaments at one end of the membrane filament filtered water collection pipe, insert the membrane filament filtered water collection pipe into the through-pipe inlet below the test environment inlet of the multi-way pipe, and use the quick-connect male head and the quick-connect female head to realize the connection and fixation of the membrane filament filtered water collection pipe and the multi-way pipe. Subsequently, turn on the water pump of the water supply and pressure regulating system, and use the filtered water measurement module to measure the amount of water filtered by the membrane filaments; the height distance between the test environment inlet and the test environment outlet should be greater than the height of the tested membrane filaments after fixation;

[0078] When evaluating the performance of a membrane bioreactor with hollow fiber membranes, adjust the water supply pressure regulating system to output an effluent water flow with a flow rate of 0.01 - 3.00 L / min and a water pressure of 0 MPa; select any one of the pipe inlets on the side of the multi-way pipe as the test environment inlet, place the multi-way pipe vertically in a way that the long pipe structure is perpendicular to the horizontal line, and after vertical placement, use any pipe inlet above the test environment inlet as the test environment outlet and connect it to the outside air at the same time, so as to form an adjustable water level inside the multi-way pipe by introducing water from the test environment inlet; after fixing the membrane filaments to be tested at one end of the membrane filament filtered water collection pipe, insert the membrane filament filtered water collection pipe into the pipe inlet below the test environment inlet of the multi-way pipe, and use a quick-connect male head and a quick-connect female head to realize the connection and fixation of the membrane filament filtered water collection pipe and the multi-way pipe. Then turn on the water pump of the water supply pressure regulating system and measure the amount of water filtered by the membrane filaments using the filtered water measurement module; the height distance between the test environment inlet and the test environment outlet should be greater than the height of the membrane filaments to be tested after fixation; install an aeration nozzle connected to an aeration pump inside the multi-way pipe, and add conventional fillers for evaluating the performance of the membrane bioreactor inside the multi-way pipe.

[0079] In one preferred implementation, to miniaturize the overall equipment and make it more convenient to switch and install the multi-way pipe in multiple modes, performance evaluation tests are conducted on conventional hollow fiber membranes available on the market, and a technical solution for reference is provided to better illustrate the above application method:

[0080] The multi-way pipe is a tee pipe and has a long pipe structure. Pipe inlets are respectively opened at both ends of the long pipe structure, and a pipe inlet is opened on the side of the long pipe structure at a distance of 1 / 5 - 2 / 5 of the length of the long pipe structure from either end, forming a tee structure; quick-connect female heads are provided on the pipe inlets; the multi-way pipe has a long pipe structure, with a length of 10.0 - 100.0 cm and a width of 1.0 - 15.0 cm. The pipe inlet on its side is an outward-extending structure, with a length of 2.0 - 15.0 cm and a width of 1.0 - 15.0 cm.

[0081] When it is necessary to evaluate the dead-end filtration performance of the hollow fiber membrane, adjust the water supply and pressure regulating system to output an effluent water flow with a water flow rate of 0.1 - 3.00 L / min and a water pressure of 0.01 - 1.6 MPa; place the multi-pass pipe vertically with the long pipe structure perpendicular to the horizontal line and the inlet of the side pipe on the upper side, select the inlet of the side pipe on the multi-pass pipe and the other inlet at the uppermost part as the test environment inlet and the test environment outlet respectively; after fixing the tested membrane filaments at one end of the membrane filament filtered water collection pipe, insert the membrane filament filtered water collection pipe into the inlet of the lowermost pipe of the multi-pass pipe, and use the quick-connect male head and quick-connect female head to realize the connection and fixation between the membrane filament filtered water collection pipe and the multi-pass pipe. Then, turn on the water pump of the water supply and pressure regulating system, and use the filtered water measurement module to measure the amount of water filtered by the membrane filaments;

[0082] When it is necessary to evaluate the cross-flow filtration performance of the hollow fiber membrane, adjust the water supply and pressure regulating system to output an effluent water flow with a water flow rate of 0.1 - 3.00 L / min and a water pressure of 0.01 - 1.2 MPa; place the multi-pass pipe vertically with the long pipe structure perpendicular to the horizontal line and the inlet of the side pipe on the lower side, select the inlet of the side pipe on the multi-pass pipe and the other inlet at the uppermost part as the test environment inlet and the test environment outlet respectively; after fixing the tested membrane filaments at one end of the membrane filament filtered water collection pipe, insert the membrane filament filtered water collection pipe into the inlet of the lowermost pipe of the multi-pass pipe, and use the quick-connect male head and quick-connect female head to realize the connection and fixation between the membrane filament filtered water collection pipe and the multi-pass pipe. Then, turn on the water pump of the water supply and pressure regulating system, and use the filtered water measurement module to measure the amount of water filtered by the membrane filaments;

[0083] When it is necessary to evaluate the gravity-driven performance of the hollow fiber membrane, adjust the water supply and pressure regulating system to output an effluent water flow with a water flow rate of 0.01 - 3.00 L / min and a water pressure of 0 MPa; place the multi-pass pipe vertically with the long pipe structure perpendicular to the horizontal line and the inlet of the side pipe on the upper side, select the inlet of the side pipe on the multi-pass pipe as the test environment inlet, select the inlet at the uppermost part of the multi-pass pipe as the test environment outlet and connect it to the outside air at the same time, so as to form an adjustable water level inside the multi-pass pipe by introducing water from the test environment inlet; after fixing the tested membrane filaments at one end of the membrane filament filtered water collection pipe, insert the membrane filament filtered water collection pipe into the inlet of the lowermost pipe of the multi-pass pipe, and use the quick-connect male head and quick-connect female head to realize the connection and fixation between the membrane filament filtered water collection pipe and the multi-pass pipe. Then, turn on the water pump of the water supply and pressure regulating system, and use the filtered water measurement module to measure the amount of water filtered by the membrane filaments;

[0084] When evaluating the performance of a membrane bioreactor with hollow fiber membranes, adjust the water supply and pressure regulating system to output an effluent water flow with a flow rate of 0.01 - 3.00 L / min and a water pressure of 0 MPa; place the multi-pass pipe vertically with the long pipe structure perpendicular to the horizontal line, and the inlet of the side pipe on the side is above. Select the inlet of the side pipe on the multi-pass pipe as the test environment water inlet, and select the inlet of the top pipe on the multi-pass pipe as the test environment water outlet and connect it to the outside air at the same time, so as to form an adjustable water level inside the multi-pass pipe by introducing water from the test environment water inlet; after fixing the tested membrane filaments at one end of the membrane filament filtered water collection pipe, insert the membrane filament filtered water collection pipe into the inlet of the bottom pipe on the multi-pass pipe, and use the quick-connect male head and quick-connect female head to realize the connection and fixation of the membrane filament filtered water collection pipe and the multi-pass pipe. Then start the water pump of the water supply and pressure regulating system, and use the filtered water measurement module to measure the amount of water filtered by the membrane filaments; set an aeration nozzle connected to the aeration pump inside the multi-pass pipe, and add conventional fillers for evaluating the performance of the membrane bioreactor inside the multi-pass pipe.

[0085] In this article, the terms "above", "below", "topmost", and "bottommost" are descriptions of the height orientation when the multi-pass pipe is placed vertically with the long pipe structure perpendicular to the horizontal line.

[0086] In one preferred embodiment, when evaluating the dead-end filtration and cross-flow filtration performance of the hollow fiber membrane, the test environment water outlet is connected to the circulation pool through the circulation pool inlet pipe, and a flow valve is provided on the circulation pool inlet pipe to adjust the water pressure inside the multi-pass pipe.

[0087] In this article, the aeration nozzle connected to the aeration pump and the conventional fillers for evaluating the performance of the membrane bioreactor are conventional choices in the field for evaluating the performance of the membrane bioreactor and are used to domesticate microorganisms.

[0088] The present application will be further explained in detail below with reference to the embodiments. However, those skilled in the art should understand that these embodiments are provided for illustrative purposes only and are not intended to limit the present application.

[0089] Embodiment

[0090] The embodiments of the present application will be described in detail below in conjunction with the embodiments. However, those skilled in the art will understand that the following embodiments are only used to illustrate the present application and should not be regarded as limiting the scope of the present application. For those not specified in the embodiments, they are carried out according to the conventional conditions or the conditions recommended by the manufacturer. For the reagents or instruments not specified by the manufacturer, they are all conventional products that can be obtained through commercial purchase. The present application should not be construed as being limited to the specific embodiments described.

[0091] Embodiment 1

[0092] In this embodiment, a multi-mode performance detection device for hollow fiber membranes includes a water supply and pressure regulation system, a multi-mode detection component, and a filtered water output measurement module.

[0093] The water supply and pressure regulation system can output an outlet water flow with an adjustable flow rate in the range of 0.01 - 3.0 L / min and an adjustable water flow pressure in the range of 0 - 1.60 MPa through a water pump and a flow valve.

[0094] Specifically, the water supply and pressure regulation system is composed of a water pump 1 that extracts test water from a circulation pool 5 through a circulation pool outlet pipe 21 and outputs the outlet water flow through a water supply pipe 22 to the multi-mode detection component 6. Since the multi-mode detection component 6 is set up in 3 groups for simultaneous detection, the water supply pipe 22 is divided into water supply branch pipes 23 corresponding to different multi-mode detection components 6 through a multi-way structure, and a pressure gauge 3 is provided on the water supply branch pipe 23; the water supply pipe 22 is also connected to a pressure regulation branch pipe 24, and a flow valve 2 is provided on the pressure regulation branch pipe 24 to adjust the water flow pressure and water flow rate in the water supply pipe 22, and the test water returns to the circulation pool after passing through the pressure regulation branch pipe 24; after the multi-mode detection component 6 inputs the test water (i.e., the outlet water flow) through the water supply branch pipe 23, the test water flows through the multi-mode detection component and then outputs and returns to the circulation pool 5 through a circulation pool inlet pipe 25. Since the multi-mode detection component 6 is set up in 3 groups for simultaneous detection, the circulation pool inlet pipe 25 also has 3 corresponding to different multi-mode detection components 6, and a flow valve 2 is also provided on the circulation pool inlet pipe 25 to overall balance the water flow pressure and water flow rate of the test water in the multi-mode detection component 6.

[0095] The water supply and pressure regulation system is placed and installed as a whole in a housing 4, and through openings for each pipe communicating with the circulation pool 5 and the multi-mode detection component 6 are respectively provided on the housing 4 to facilitate the passing through and connection of each pipe.

[0096] The multi-mode detection component 6 is mainly composed of a tee pipe 8 for providing a detection environment and a membrane filament fixing device for providing membrane filament fixing and filtered water collection. The tee pipe 8 is a long pipe structure, with through-pipe inlets respectively opened at both ends of the long pipe structure, and a through-pipe inlet is opened on the side of the long pipe structure at a distance of 1 / 5 of the length of the long pipe structure from either end, forming a tee structure; a quick-connect female head 9 is provided on the through-pipe inlet; the tee pipe 8 is a long pipe structure, 30.0 cm long and 2.5 cm wide, and the through-pipe inlet on its side is an externally extended structure, 5.0 cm long and 2.5 cm wide.

[0097] The membrane filament fixing device is mainly composed of a membrane filament filtered water collecting pipe 10 and a quick-connect male head 11. The membrane filament filtered water collecting pipe 10 is of a long pipe structure. One end of the membrane filament filtered water collecting pipe 10 is connected with a funnel-shaped mounting nozzle 12 for fixedly connecting the membrane filament. The opposite end is provided with a quick-connect male head 11. The membrane filament filtered water collecting pipe 10 and the funnel-shaped mounting nozzle 12 can pass through the quick-connect female head 9 and extend into the tee pipe 8. The quick-connect male head 11 corresponds to and matches the quick-connect female head 9 on the tee pipe 8.

[0098] The method of fixedly connecting the funnel-shaped mounting nozzle 12 to the membrane filament is as shown in the appendix Figure 5 Specifically, after bending the membrane filament into a U shape, both ends of the membrane filament are inserted into the funnel-shaped mounting nozzle 12 to ensure that the filtered water of the membrane filament enters the membrane filament filtered water collecting pipe 10. Then, an adhesive is used for sealing and fixing the membrane filament to form a sealing layer, thereby preventing the test water in the tee pipe 8 from directly entering the membrane filament filtered water collecting pipe.

[0099] The filtered water measurement module includes a filtered water weighing container 18 and an electronic balance 19. After the membrane filament filtered water collecting pipe 10 collects the filtered water of the membrane filament, it is introduced into the filtered water weighing container 18, and the electronic balance 19 measures the amount of filtered water of the membrane filament.

[0100] Example 2

[0101] On the basis of Example 1, for more convenient use, corresponding to the size specification of the tee pipe 8 in the multi-mode detection component 6 on the housing 4, a clamping member 15 for conveniently vertically fixing it is provided, and a test water inlet pipe quick interface 13 and a test water outlet pipe quick interface 14 are provided, so as to conveniently connect the water supply pressure regulating system with the multi-mode detection component 6 in a quick-connect pipe manner.

[0102] The test water inlet pipe quick interface 13 is fixedly connected to the water supply branch pipe 23, and the test water outlet pipe quick interface 14 is fixedly connected to the circulating water tank inlet pipe 25.

[0103] Example 3

[0104] On the basis of Example 1, for more convenient use, corresponding to the size specification of the tee pipe 8 in the multi-mode detection component 6 on the housing 4, a placement groove 16 and a binding member 17 for conveniently vertically fixing it are provided.

[0105] Example 4

[0106] Example 4 On the basis of Example 1, it further includes a conventional electronic control system. The electronic control system collects the data of the filtered water measurement module and calculates using the performance evaluation formula of hollow fiber membranes which is common knowledge in the art. This function is achieved through a computer and a data transmission line connected to the filtered water measurement module;

[0107] For the convenience of data transmission, the pressure gauge 3 is a digital display pressure gauge, and the electronic balance 19 is a commercially available electronic balance with a data output function;

[0108] The electronic control system connects to and collects the data of the digital display pressure gauge and the electronic balance through the data transmission line, thus making it more convenient for evaluation and calculation.

[0109] Application Example 1

[0110] As shown in the appendix Figure 8 When using the multi-mode performance detection device for hollow fiber membranes described in Example 1 to evaluate the dead-end filtration performance of the hollow fiber membrane, adjust the water supply pressure regulating system to output an effluent water flow with a flow rate of 0.1 - 3.00 L / min and a water pressure of 0.01 - 1.6 MPa; place the tee pipe vertically with the long pipe structure perpendicular to the horizontal line and the side pipe inlet b above. Select the side pipe inlet b of the tee pipe and the other upper pipe inlet a as the test environment water inlet and the test environment water outlet respectively; after fixing the tested membrane filament 7 at one end of the membrane filament filtered water collection pipe, insert the membrane filament filtered water collection pipe into the lower pipe inlet c of the tee pipe, and use the quick-connect male head and the quick-connect female head to achieve the connection and fixation of the membrane filament filtered water collection pipe and the tee pipe. Then turn on the water pump of the adjusted water supply pressure regulating system, and use the filtered water measurement module to measure the amount of water filtered out by the membrane filament;

[0111] By adjusting the flow valve, the test water pressure in the multi-mode detection component can be accurately controlled to be 0.05 MPa, 0.10 MPa, 0.15 MPa, 0.20 MPa, 0.30 MPa, 0.40 MPa, 0.60 MPa, etc., meeting the test pressure conditions of all conventional microfiltration, ultrafiltration, and nanofiltration hollow fiber membranes, and being able to operate continuously and stably for a long time.

[0112] Application Example 2

[0113] As shown in the appendix Figure 9As shown in the figure, when evaluating the cross-flow filtration performance of the hollow fiber membrane using the multi-mode performance detection device for hollow fiber membranes described in Example 1, adjust the water supply and pressure regulating system to output an outlet water flow with a water flow rate of 0.1 - 3.00 L / min and a water pressure of 0.01 - 1.2 MPa; place the tee pipe vertically with the long pipe structure perpendicular to the horizontal line and the side pipe inlet at the lower part, select the side pipe inlet b on the tee pipe and the other upper pipe inlet c as the test environment water inlet and the test environment water outlet respectively; after fixing the tested membrane filament 7 at one end of the membrane filament filtration outlet collecting pipe, insert the membrane filament filtration outlet collecting pipe into the lower pipe inlet a of the tee pipe, and use the quick-connect male and female connectors to connect and fix the membrane filament filtration outlet collecting pipe to the tee pipe. Then, turn on the water pump of the adjusted water supply and pressure regulating system, and measure the amount of water filtered out by the membrane filament using the filtered water measurement module;

[0114] By adjusting the flow valve, the test water pressure in the multi-mode detection component can be accurately controlled to be 0.05 MPa, 0.10 MPa, 0.15 MPa, 0.20 MPa, 0.30 MPa, 0.40 MPa, 0.60 MPa, etc., meeting the test pressure conditions of all conventional microfiltration, ultrafiltration, and nanofiltration hollow fiber membranes, and being able to operate continuously and stably for a long time;

[0115] And it is possible to choose to replace the test water with other aqueous solutions containing pollutants (such as bovine serum albumin, sodium alginate, humic acid, dye molecules, etc.), and it is also possible to batch complete the separation performance test of the hollow fiber membrane, improving the detection efficiency of the membrane filament performance.

[0116] Application Example 3

[0117] As shown in the attachment Figure 10 As shown in the figure, when evaluating the gravity-driven performance of the hollow fiber membrane using the multi-mode performance detection device for hollow fiber membranes described in Example 1, adjust the water supply and pressure regulating system to output an outlet water flow with a water flow rate of 0.01 - 3.00 L / min and a water pressure of 0 MPa; place the tee pipe vertically with the long pipe structure perpendicular to the horizontal line and the side pipe inlet at the upper part, select the side pipe inlet b on the tee pipe as the test environment water inlet, and select the upper pipe inlet a of the tee pipe as the test environment water outlet and connect it to the outside air at the same time, so as to form an adjustable water level by introducing water from the test environment water inlet inside the tee pipe; after fixing the tested membrane filament 7 at one end of the membrane filament filtration outlet collecting pipe, insert the membrane filament filtration outlet collecting pipe into the lower pipe inlet c of the tee pipe, and use the quick-connect male and female connectors to connect and fix the membrane filament filtration outlet collecting pipe to the tee pipe. Then, turn on the water pump of the adjusted water supply and pressure regulating system, and measure the amount of water filtered out by the membrane filament using the filtered water measurement module;

[0118] By adjusting the flow valve, the test water pressure in the multi-mode detection component can be precisely controlled to be 0.05 MPa, 0.10 MPa, 0.150 MPa, 0.20 MPa, 0.30 MPa, 0.40 MPa, 0.60 MPa, etc., meeting the test pressure conditions of all conventional microfiltration, ultrafiltration, and nanofiltration hollow fiber membranes, and enabling continuous and long-term stable operation;

[0119] Moreover, it is possible to choose to replace the test water with other water sources (such as lake water, rainwater, river water, etc.), and it is also possible to batch complete the separation performance test of the hollow fiber membrane, improving the detection efficiency of the membrane filament performance.

[0120] Application Example 4

[0121] As shown in the Figure 11 attachment, when using the multi-mode performance detection device for hollow fiber membranes described in Example 1 to evaluate the performance of the membrane bioreactor of the hollow fiber membrane, adjust the water supply pressure regulating system to output an outlet water flow with a water flow rate of 0.01 - 3.00 L / min and a water pressure of 0 MPa; place the three-way pipe vertically with the long pipe structure perpendicular to the horizontal line and the inlet of the side pipe on the upper side, select the inlet b of the side pipe on the three-way pipe as the test environment water inlet, and select the inlet a at the top of the three-way pipe as the test environment water outlet and connect it to the outside air at the same time, so as to form an adjustable water level inside the three-way pipe by inlet water from the test environment water inlet; after fixing the tested membrane filament 7 at one end of the membrane filament filtered water collection pipe, extend the membrane filament filtered water collection pipe into the inlet c of the lowest pipe of the three-way pipe, and use the quick-connect male head and quick-connect female head to realize the connection and fixation of the membrane filament filtered water collection pipe and the three-way pipe. Then turn on the water pump of the adjusted water supply pressure regulating system, and use the filtered water measurement module to measure the amount of water filtered by the membrane filament; set an aeration nozzle connected to the aeration pump 20 inside the three-way pipe, and add conventional fillers for evaluating the performance of the membrane bioreactor inside the three-way pipe;

[0122] After a period of time, the test water in the multi-mode detection component will be affected by gravity and pass through the micropores of the hollow fiber membrane to achieve effective purification of water. Since the membrane bioreactor has a slow water outlet, the water inlet volume at the inlet b of the through pipe can be controlled by controlling the operation time of the water pump to meet the long-term stable operation of the membrane bioreactor MBR. On the premise of ensuring the water source, this device can operate stably for more than 180 days, fully simulating the aerobic membrane bioreactor treatment environment of the sewage treatment plant;

[0123] Furthermore, in order to improve the long-term operation stability and precise water supply, the water pump in Example 1 can be selected as a peristaltic pump.

Claims

1. A hollow fiber membrane multi-mode performance detection device, characterized in that It includes a water supply pressure regulating system, a multi-mode detection component, and a filtered water output measurement module. The water supply pressure regulating system can output a water flow with an adjustable flow rate within the range of 0.01 - 3.0 L / min and an adjustable water flow pressure within the range of 0 - 1.60 MPa through a water pump and a flow valve. The multi-mode detection component is mainly composed of a multi-way pipe for providing a detection environment and a membrane filament fixing device for fixing membrane filaments and collecting filtered water output. The multi-way pipe is at least a three-way pipe and has a long pipe structure. There are through-pipe inlets at both ends of the long pipe structure, and at least one through-pipe inlet is opened on the side edge of the long pipe structure at a distance of 1 / 10 - 1 / 2 of the length of the long pipe structure from either end, forming a structure with at least three-way; quick-connect female heads are provided on the through-pipe inlets; at least one through-pipe inlet in the multi-way pipe serves as a test environment water inlet and is connected to the water supply pressure regulating system to introduce the water flow; at least one through-pipe inlet in the multi-way pipe serves as a test environment water outlet and is connected to the outside. The membrane filament fixing device is mainly composed of a membrane filament filtered water collection pipe and a quick-connect male head, and the membrane filament filtered water collection pipe can pass through the quick-connect female head and extend into the interior of the multi-way pipe. The membrane filament filtered water collection pipe has a long pipe structure, with a membrane filament fixedly connected to one end and a quick-connect male head provided at the opposite end. The filtered water output measurement module is connected to the membrane filament filtered water collection pipe, and measures the amount of water filtered by the membrane filament through conventional volume or weight measurement equipment.

2. The device according to claim 1, wherein: The water supply pressure regulating system also includes a pipeline pressure gauge.

3. The device according to claim 1, characterized in that: The water supply pressure regulating system is placed and installed as a whole in a housing, and conventional fixing parts for fixing the multi-mode detection component are also provided on the housing.

4. The device according to claim 1, characterized in that: One end of the membrane filament filtered water collection pipe is a flared opening or is connected with a funnel-shaped mounting nozzle and can pass through the quick-connect female head and extend into the interior of the multi-way pipe.

5. The device according to claim 1, characterized in that: The multi-way pipe has a long pipe structure, with a length of 10.0 - 100.0 cm and a width of 1.0 - 15.0 cm. The through-pipe inlets on its side edge are extended structures, with a length of 2.0 - 15 cm and a width of 1.0 - 15.0 cm.

6. The device according to claim 1, characterized in that: The water supply pressure regulating system also includes a circulating water tank filled with test water. The test water discharged by the multi-mode detection component enters the circulating water tank through the circulating water tank inlet pipe, and the water pump pumps out the test water in the circulating water tank through the circulating water tank outlet pipe.

7. The device according to claim 6, wherein: A flow valve is provided on the circulating water tank inlet pipe to adjust the water flow pressure in the multi-way pipe.

8. The device according to claim 1, characterized in that: The multi-mode performance detection device for hollow fiber membranes also includes a conventional electric control system. The electric control system calculates by collecting data from the filtered water output measurement module and using a hollow fiber membrane performance evaluation formula well-known in the art.

9. An application method of the hollow fiber membrane multi-mode performance detection device according to claim 1, characterized in that It includes the following steps: When it is necessary to evaluate the dead-end filtration performance of the hollow fiber membrane, adjust the water supply and pressure regulating system to output an effluent water flow with a flow rate of 0.1 - 3.00 L / min and a water pressure of 0.01 - 1.6 MPa; select at least one pipe inlet on the side of the multi-pass pipe and any other pipe inlet as the test environment inlet and the test environment outlet respectively, so as to form a water flow channel with the shortest distance between the test environment inlet and the test environment outlet inside the multi-pass pipe; after fixing the membrane filament to be tested at one end of the membrane filament filtered water collection pipe, extend the membrane filament filtered water collection pipe into the pipe inlet of the multi-pass pipe far from the water flow channel, and use the quick-connect male head and the quick-connect female head to realize the connection and fixation of the membrane filament filtered water collection pipe and the multi-pass pipe. Then, start the water pump of the adjusted water supply and pressure regulating system, and measure the amount of water filtered by the membrane filament using the filtered water measurement module; the pipe inlet far from the water flow channel should ensure that after the membrane filament filtered water collection pipe is connected and fixed, the test membrane filament does not extend into the water flow channel; When it is necessary to evaluate the cross-flow filtration performance of the hollow fiber membrane, adjust the water supply and pressure regulating system to output an effluent water flow with a flow rate of 0.1 - 3.00 L / min and a water pressure of 0.01 - 1.2 MPa; select any two pipe inlets of the multi-pass pipe as the test environment inlet and the test environment outlet respectively, so as to form a water flow channel with the shortest distance between the test environment inlet and the test environment outlet inside the multi-pass pipe; after fixing the membrane filament to be tested at one end of the membrane filament filtered water collection pipe, extend the membrane filament filtered water collection pipe into the pipe inlet of the multi-pass pipe close to the water flow channel, and use the quick-connect male head and the quick-connect female head to realize the connection and fixation of the membrane filament filtered water collection pipe and the multi-pass pipe. Then, start the water pump of the adjusted water supply and pressure regulating system, and measure the amount of water filtered by the membrane filament using the filtered water measurement module; the pipe inlet close to the water flow channel should ensure that after the membrane filament filtered water collection pipe is connected and fixed, the test membrane filament extends into the water flow channel; When it is necessary to evaluate the gravity-driven performance of the hollow fiber membrane, adjust the water supply and pressure regulating system to output an effluent water flow with a water flow rate of 0.01 - 3.00 L / min and a water pressure of 0 MPa; select any one of the pipe inlets on the side of the multi-way pipe as the test environment water inlet, place the multi-way pipe vertically with the long pipe structure perpendicular to the horizontal line, and after vertical placement, use any pipe inlet above the test environment water inlet as the test environment water outlet and connect it to the outside air at the same time, so as to form an adjustable water level inside the multi-way pipe by introducing water from the test environment water inlet; after fixing the membrane filaments to be tested at one end of the membrane filament filtered water collection pipe, insert the membrane filament filtered water collection pipe into the pipe inlet below the test environment water inlet of the multi-way pipe, and use a quick-connect male head and a quick-connect female head to realize the connection and fixation of the membrane filament filtered water collection pipe and the multi-way pipe. Subsequently, turn on the water pump of the water supply and pressure regulating system, and use the filtered water measurement module to measure the amount of water filtered by the membrane filaments; the height distance between the test environment water inlet and the test environment water outlet should be greater than the height of the membrane filaments to be tested after fixation; When it is necessary to evaluate the performance of the membrane bioreactor of the hollow fiber membrane, adjust the water supply and pressure regulating system to output an effluent water flow with a water flow rate of 0.01 - 3.00 L / min and a water pressure of 0 MPa; select any one of the pipe inlets on the side of the multi-way pipe as the test environment water inlet, place the multi-way pipe vertically with the long pipe structure perpendicular to the horizontal line, and after vertical placement, use any pipe inlet above the test environment water inlet as the test environment water outlet and connect it to the outside air at the same time, so as to form an adjustable water level inside the multi-way pipe by introducing water from the test environment water inlet; after fixing the membrane filaments to be tested at one end of the membrane filament filtered water collection pipe, insert the membrane filament filtered water collection pipe into the pipe inlet below the test environment water inlet of the multi-way pipe, and use a quick-connect male head and a quick-connect female head to realize the connection and fixation of the membrane filament filtered water collection pipe and the multi-way pipe. Subsequently, turn on the water pump of the water supply and pressure regulating system, and use the filtered water measurement module to measure the amount of water filtered by the membrane filaments; the height distance between the test environment water inlet and the test environment water outlet should be greater than the height of the membrane filaments to be tested after fixation; install an aeration nozzle connected to an aeration pump in the multi-way pipe, and add conventional fillers for evaluating the performance of the membrane bioreactor in the multi-way pipe.

10. According to the application method described in claim 9, characterized in that: The multi-way pipe is a three-way pipe and has a long pipe structure. Pipe inlets are respectively opened at both ends of the long pipe structure, and a pipe inlet is opened on the side of the long pipe structure at a distance of 1 / 5 - 2 / 5 of the length of the long pipe structure from either end, forming a three-way structure; quick-connect female heads are provided on the pipe inlets; the multi-way pipe has a long pipe structure, with a length of 10.0 - 100.0 cm and a width of 1.0 - 15.0 cm. The pipe inlets on its side are extended structures, with a length of 2.0 - 15.0 cm and a width of 1.0 - 15.0 cm; When it is necessary to evaluate the dead-end filtration performance of the hollow fiber membrane, adjust the water supply and pressure regulating system to output an effluent water flow with a water flow rate of 0.1 - 3.00 L / min and a water pressure of 0.01 - 1.6 MPa; place the multi-pass pipe vertically with the long pipe structure perpendicular to the horizontal line and the through-pipe inlet on the side above, and select the through-pipe inlet on the side of the multi-pass pipe and the other through-pipe inlet at the uppermost as the test environment water inlet and the test environment water outlet respectively; after fixing the membrane filament to be tested at one end of the membrane filament filtered water collection pipe, insert the membrane filament filtered water collection pipe into the through-pipe inlet at the bottom of the multi-pass pipe, and use the quick-connect male head and the quick-connect female head to realize the connection and fixation of the membrane filament filtered water collection pipe and the multi-pass pipe. Then turn on the water pump of the water supply and pressure regulating system, and use the filtered water measurement module to measure the amount of water filtered by the membrane filament; When it is necessary to evaluate the cross-flow filtration performance of the hollow fiber membrane, adjust the water supply and pressure regulating system to output an effluent water flow with a water flow rate of 0.1 - 3.00 L / min and a water pressure of 0.01 - 1.2 MPa; place the multi-pass pipe vertically with the long pipe structure perpendicular to the horizontal line and the through-pipe inlet on the side below, and select the through-pipe inlet on the side of the multi-pass pipe and the other through-pipe inlet at the uppermost as the test environment water inlet and the test environment water outlet respectively; after fixing the membrane filament to be tested at one end of the membrane filament filtered water collection pipe, insert the membrane filament filtered water collection pipe into the through-pipe inlet at the bottom of the multi-pass pipe, and use the quick-connect male head and the quick-connect female head to realize the connection and fixation of the membrane filament filtered water collection pipe and the multi-pass pipe. Then turn on the water pump of the water supply and pressure regulating system, and use the filtered water measurement module to measure the amount of water filtered by the membrane filament; When it is necessary to evaluate the gravity-driven performance of the hollow fiber membrane, adjust the water supply and pressure regulating system to output an effluent water flow with a water flow rate of 0.01 - 3.00 L / min and a water pressure of 0 MPa; place the multi-pass pipe vertically with the long pipe structure perpendicular to the horizontal line and the through-pipe inlet on the side above, select the through-pipe inlet on the side of the multi-pass pipe as the test environment water inlet, and select the through-pipe inlet at the uppermost of the multi-pass pipe as the test environment water outlet and connect it to the outside air at the same time, so as to form an adjustable water level inside the multi-pass pipe by introducing water from the test environment water inlet; after fixing the membrane filament to be tested at one end of the membrane filament filtered water collection pipe, insert the membrane filament filtered water collection pipe into the through-pipe inlet at the bottom of the multi-pass pipe, and use the quick-connect male head and the quick-connect female head to realize the connection and fixation of the membrane filament filtered water collection pipe and the multi-pass pipe. Then turn on the water pump of the water supply and pressure regulating system, and use the filtered water measurement module to measure the amount of water filtered by the membrane filament; When evaluating the performance of a membrane bioreactor with hollow fiber membranes, adjust the water supply pressure regulating system to output an effluent water flow with a flow rate of 0.01 - 3.00 L / min and a water pressure of 0 MPa; place the multi-way pipe vertically with the long pipe structure perpendicular to the horizontal line and the inlet of the side pipe on the side above. Select the inlet of the side pipe on the multi-way pipe as the inlet of the test environment, and select the inlet of the topmost pipe on the multi-way pipe as the outlet of the test environment and connect it to the outside air at the same time, so as to form an adjustable water level by introducing water from the inlet of the test environment inside the multi-way pipe; after fixing the membrane filaments to be tested at one end of the membrane filament filtered water collection pipe, insert the membrane filament filtered water collection pipe into the inlet of the bottommost pipe of the multi-way pipe, and use the quick-connect male head and quick-connect female head to realize the connection and fixation of the membrane filament filtered water collection pipe and the multi-way pipe. Then start the water pump of the water supply pressure regulating system and measure the amount of water filtered by the membrane filaments using the filtered water measurement module; set an aeration nozzle connected to the aeration pump inside the multi-way pipe, and add conventional fillers for evaluating the performance of the membrane bioreactor inside the multi-way pipe.

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