Ultrafiltration membrane pressure detection device

Abstract

The utility model provides an ultrafiltration membrane pressure detection device, which relates to the technical field of ultrafiltration membrane pressure detection, and comprises a shell, the top of the shell is provided with a top cover, the top of the top cover is connected with a drain outlet, the front surface of the shell is connected with a monitoring alarm assembly, and the monitoring alarm assembly comprises a purified water outlet. According to the utility model, the pressure sensor and the flow sensor are respectively arranged at the purified water outlet and the drain outlet, so that a real-time monitoring effect can be achieved, and when the flow or the pressure difference reaches a set numerical value, the PLC controller gives an instruction to carry out systematic backwashing, forward flushing and other maintenance actions on the membrane at the moment; and if the trans-membrane pressure difference almost does not exist, the serious problems such as membrane breakage are possibly caused, and the alarm can automatically give an alarm to remind an operator to check the fault of the membrane in time, so that the problem that the membrane cannot be normally used due to blockage is avoided.

Description

Technical Field

[0001] This utility model relates to the field of ultrafiltration membrane pressure detection technology, and in particular to an ultrafiltration membrane pressure detection device. Background Technology

[0002] Ultrafiltration membranes are polymeric semi-permeable membranes with pore sizes ranging from 10 nanometers to 100 nanometers (some sources say 0.001-0.02 micrometers or 1100 nanometers), belonging to the asymmetric membrane type. They are typically made of various polymeric materials, such as cellulose acetate, polyethylene, polysulfone, polyamide, and aromatic polymers.

[0003] The working principle of ultrafiltration membranes is mainly based on membrane filtration driven by pressure difference. When appropriate pressure is applied to one side of the membrane, the solvent and some lower molecular weight solutes in the solution permeate through the tiny pores of the ultrafiltration membrane to the other side, while higher molecular weight solutes or some emulsion micelles are retained, thus achieving filtration and separation. However, a significant challenge in practical applications of existing ultrafiltration membrane technology is the lack of effective monitoring and automatic alarm mechanisms when the ultrafiltration membrane becomes clogged, damaged, or experiences other abnormalities. This deficiency directly affects the normal filtration function of the ultrafiltration membrane, leading to water quality degradation, reduced treatment efficiency, and increased maintenance costs.

[0004] Therefore, we propose a novel ultrafiltration membrane pressure detection device. Utility Model Content

[0005] The purpose of this invention is to address a significant challenge faced by existing ultrafiltration membrane technology in practical applications: the lack of an effective monitoring and automatic alarm mechanism when the ultrafiltration membrane becomes clogged, damaged, or experiences other abnormalities. This deficiency directly affects the normal filtration function of the ultrafiltration membrane, leading to problems such as decreased water quality, reduced treatment efficiency, and increased maintenance costs.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an ultrafiltration membrane pressure detection device, comprising a housing, a top cover on the top of the housing, a drain outlet connected to the top of the top cover, a monitoring alarm component connected to the front surface of the housing, and a water inlet connected to the bottom of the housing. The monitoring alarm component includes a purified water outlet, a first pressure sensor and a first flow sensor respectively embedded in the inner walls on both sides of the purified water outlet, a second pressure sensor and a second flow sensor respectively embedded in the inner walls on both sides of the water inlet, a PLC control panel located at the lower end of the purified water outlet, and an alarm located at the lower end of the PLC control panel.

[0007] Furthermore, the PLC control panel is electrically connected to an external power supply via a control switch, and the PLC control panel is electrically connected to the first pressure sensor, the alarm, the second pressure sensor, the second flow sensor, and the first flow sensor.

[0008] Furthermore, an ultrafiltration membrane filter element is installed inside the housing, and fixing blocks are connected to both outer surfaces of the housing. Two sets of springs are installed inside the fixing blocks.

[0009] Furthermore, a push plate is connected to one side of each of the two sets of springs, and an insert block and a top block are respectively connected to the upper and lower ends of one side surface of the push plate, and an automatic air vent valve is connected to the top of the drain outlet.

[0010] Furthermore, guide grooves are provided on both inner walls of the top cover, and insertion holes are provided on the inner walls of the guide grooves.

[0011] Furthermore, the push plate and the spring form an elastic structure, the insert block has a bevel on one side, and the insert block and the insertion hole form an insertion connection.

[0012] Furthermore, the position and size of the guide groove are matched with the position and size of the fixing block.

[0013] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0014] 1. In this utility model, by installing pressure sensors and flow sensors at the water outlet and sewage outlet respectively, real-time monitoring can be achieved. When the flow rate or pressure difference reaches the set value, the PLC controller will issue an instruction to perform maintenance actions such as systematic backwashing and forward flushing of the membrane. If the transmembrane pressure difference is almost non-existent, it may be a serious problem such as membrane rupture. The alarm will automatically sound to remind the operator to check the fault in time to avoid blockage and failure to use the membrane normally.

[0015] 2. In this utility model, when replacing the ultrafiltration membrane filter element, the top cover can be quickly disassembled by pressing the top block, and then the ultrafiltration membrane filter element can be replaced. The top cover can then be fixed by the quick installation method of the spring, which improves the convenience of replacing the ultrafiltration membrane filter element. Attached Figure Description

[0016] Figure 1 This utility model provides a three-dimensional structural schematic diagram of an ultrafiltration membrane pressure detection device;

[0017] Figure 2 This invention provides an exploded structural diagram of an ultrafiltration membrane pressure detection device.

[0018] Figure 3 This invention provides a partial cross-sectional schematic diagram of an ultrafiltration membrane pressure detection device;

[0019] Figure 4 This invention provides a three-dimensional structural diagram of the top cover of an ultrafiltration membrane pressure detection device.

[0020] Legend: 1. Outer shell; 2. Top cover; 3. Drain outlet; 4. Monitoring and alarm assembly; 401. Clean water outlet; 402. First pressure sensor; 403. PLC control panel; 404. Alarm; 405. Second pressure sensor; 406. Second flow sensor; 407. Sealing ring; 408. First flow sensor; 409. Automatic air vent valve; 5. Ultrafiltration membrane filter element; 6. Insertion hole; 7. Fixing block; 8. Spring; 9. Push plate; 10. Top block; 11. Insertion block; 12. Guide groove; 13. Water inlet. Detailed Implementation

[0021] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0022] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0023] Example 1, such as Figure 1 - Figure 3 As shown, this utility model provides an ultrafiltration membrane pressure detection device, including a housing 1, a top cover 2 on the top of the housing 1, a drain port 3 connected to the top of the top cover 2, an automatic air vent valve 409 connected to the top of the drain port 3, a monitoring alarm component 4 connected to the front surface of the housing 1, and a water inlet 13 connected to the bottom of the housing 1. The monitoring alarm component 4 includes a purified water outlet 401, and a first pressure sensor 402 and a first flow sensor 408 are respectively embedded in the inner walls of both sides of the purified water outlet 401. The water inlet 13 is located on both sides of the water outlet 13. The inner wall is fitted with a second pressure sensor 405 and a second flow sensor 406 respectively. A PLC control panel 403 is set at the lower end of the purified water outlet 401. An alarm 404 is set at the lower end of the PLC control panel 403. The PLC control panel 403 is electrically connected to an external power supply through a control switch. The PLC control panel 403 is electrically connected to the first pressure sensor 402, the alarm 404, the second pressure sensor 405, the second flow sensor 406 and the first flow sensor 408.

[0024] The overall effect of Embodiment 1 is that, during normal operation, if the pressure at the drain outlet 3 and the pressure at the purified water outlet 401 remain relatively stable with small fluctuations, it indicates that the ultrafiltration membrane is operating stably. For example, if the reading of the second pressure sensor 405 at the drain outlet 3 remains stable within a small pressure range for a period of time, and the pressure at the purified water outlet 401 also exhibits a similar stable state, then the ultrafiltration membrane has good operational stability. Conversely, if the pressure fluctuates frequently and significantly, it may indicate that the ultrafiltration membrane is clogged, damaged, or has other abnormalities, affecting its normal filtration function and leading to unstable pressure.

[0025] - Stability of pressure difference: Calculate the difference between the pressure at inlet 13 and the pressure at outlet 401, i.e., the transmembrane pressure difference. If the transmembrane pressure difference remains relatively stable during operation, it indicates that the ultrafiltration membrane's filtration performance is stable and there are no serious contamination or clogging problems. If the transmembrane pressure difference gradually increases, it may be due to the gradual accumulation of impurities and contaminants on the surface of the ultrafiltration membrane, leading to a decrease in membrane permeability, requiring cleaning or maintenance. If the transmembrane pressure difference suddenly increases or decreases, it may be due to serious problems such as damage to the ultrafiltration membrane, requiring immediate shutdown and inspection.

[0026] - Correspondence between flow rate and pressure: When the flow rate at drain outlet 3 changes, observe the changes in pressure at drain outlet 3 and purified water outlet 401. If the pressure changes are as expected under different influent flow rates, and the flow rate at purified water outlet 401 also changes proportionally, it indicates that the ultrafiltration membrane is operating stably. For example, if the flow rate at drain outlet 3 increases, the pressure at drain outlet 3 increases accordingly, and the pressure at purified water outlet 401 also increases, along with the flow rate at purified water outlet 401. This indicates that the ultrafiltration membrane can normally cope with changes in influent flow rate and operates stably.

[0027] - Flow Rate Changes: Observe the flow rate changes at the purified water outlet 401 while maintaining relatively stable inlet pressure. If the flow rate at the purified water outlet 401 remains at a high and stable level, it indicates that the ultrafiltration membrane has good permeability and can effectively filter water through the membrane. If the flow rate at the purified water outlet 401 gradually decreases, it may be due to contamination or blockage of the ultrafiltration membrane, leading to reduced membrane permeability. If the flow rate at the purified water outlet 401 suddenly decreases or even approaches zero, it may be due to severe blockage or damage to the ultrafiltration membrane, preventing water from passing through the membrane normally.

[0028] - Flow rate decay rate: The flow rate decay rate is calculated by monitoring the flow rates at drain outlet 3 and purified water outlet 401 over a period of time. If the flow rate decay rate is small, it indicates that the permeability of the ultrafiltration membrane is maintained well; if the flow rate decay rate is large, it indicates that the permeability of the ultrafiltration membrane is gradually decreasing, and it needs to be cleaned or replaced.

[0029] - Compare the inlet and outlet flow rates of purified water: Compare the flow rates at drain outlet 3 and purified water outlet 401. Under normal circumstances, due to the filtration effect of the ultrafiltration membrane, the flow rate at purified water outlet 401 will be less than the flow rate at drain outlet 3, but there should be a relatively stable ratio between the two. If the ratio of the flow rate at purified water outlet 401 to the flow rate at drain outlet 3 deviates significantly from the normal range, and factors such as sensor malfunction have been ruled out, it may be due to a problem with the permeability of the ultrafiltration membrane, leading to abnormal filtration performance.

[0030] This allows for real-time monitoring by installing pressure sensors at the outlet 401 and flow sensors at the inlet 3. When the flow rate or pressure drops to the set value, the PLC control panel 403 will automatically initiate the membrane's maintenance backwashing and forward flushing program. When the flow rate is greater than the set value or the pressure difference is less than the set value, the alarm 404 will sound an alarm to remind the operator to check for faults in time to avoid membrane rupture and malfunction. Because a good ultrafiltration membrane can only pass water and not air, an automatic air vent valve 409 is added to the ultrafiltration membrane's drain outlet 13 to solve the problem of air entering the ultrafiltration membrane after a water outage and water supply interruption. The air will be automatically discharged to prevent air hammer damage to the membrane fibers.

[0031] Example 2, as Figure 1 and Figure 4 As shown, an ultrafiltration membrane filter element 5 is installed inside the outer shell 1. Fixing blocks 7 are connected to both outer surfaces of the outer shell 1. Two sets of springs 8 are installed inside the fixing blocks 7. A push plate 9 is connected to one side of the two sets of springs 8. An insert block 11 and a top block 10 are connected to the upper and lower ends of one side surface of the push plate 9, respectively. Guide grooves 12 are opened on both inner walls of the top cover 2. Insertion holes 6 are opened on the inner walls of the guide grooves 12. The push plate 9 and the springs 8 form an elastic structure. An oblique opening is opened on one side of the insert block 11. The insert block 11 and the insertion hole 6 form an insertion connection. The position and size of the guide groove 12 match the position and size of the fixing block 7.

[0032] The effect achieved by the entire embodiment 2 is that when it is necessary to replace the ultrafiltration membrane filter element 5 inside the outer shell 1, both sets of top blocks 10 can be pressed at the same time, so that the top blocks 10 can push the push plate 9 to squeeze the spring 8 and drive the insertion block 11 to be pulled out from the insertion hole 6. Then, the top cover 2 can be removed from the surface of the outer shell 1. At this time, the ultrafiltration membrane filter element 5 inside the outer shell 1 can be taken out for replacement. After the ultrafiltration membrane filter element 5 is replaced, the guide groove 12 at the bottom of the top cover 2 can be aligned with the position of the fixing block 7 and pressed down, so that the oblique position of the insertion block 11 is squeezed and automatically retracts into the fixing block 7. When the top cover 2 is completely installed on the top of the outer shell 1, the spring 8 will push the push plate 9 through its own elasticity to drive the insertion block 11 into the insertion hole 6 for fixing. In addition, the top cover 2 is provided with a sealing ring 407, which can play a sealing role to prevent water leakage and improve the convenience of replacing the ultrafiltration membrane filter element 5.

[0033] Working principle: By installing pressure sensors and flow sensors at the water outlet 401 and the drain outlet 3 respectively, real-time monitoring can be achieved. When the flow rate or pressure drops to the set value, the alarm 404 will automatically sound an alarm to remind the operator to check the fault in time to avoid blockage and failure to use normally. When replacing the ultrafiltration membrane filter element 5, the top cover 2 can be quickly removed by pressing the top block 10, and then the ultrafiltration membrane filter element 5 can be replaced. Then, the top cover 2 can be fixed by the quick installation method of the spring 8, which improves the convenience of replacing the ultrafiltration membrane filter element 5.

[0034] The above are merely preferred embodiments of this utility model and are not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from the technical solution of this utility model shall still fall within the protection scope of this utility model.

Claims

1. An ultrafiltration membrane pressure detection device, comprising a housing (1), characterized in that: The top of the outer shell (1) is provided with a top cover (2), the top of the top cover (2) is connected to a drain outlet (3), the front surface of the outer shell (1) is connected to a monitoring alarm component (4), and the bottom of the outer shell (1) is connected to a water inlet (13). The monitoring alarm component (4) includes a purified water outlet (401), on which a first pressure sensor (402) and a first flow sensor (408) are respectively embedded on the inner walls of both sides of the purified water outlet (401), and on which a second pressure sensor (405) and a second flow sensor (406) are respectively embedded on the inner walls of both sides of the water inlet (13), and a PLC control panel (403) is provided at the lower end of the purified water outlet (401), and an alarm (404) is provided at the lower end of the PLC control panel (403).

2. The ultrafiltration membrane pressure detection device according to claim 1, characterized in that: The PLC control panel (403) is electrically connected to an external power supply via a control switch. The PLC control panel (403) is also electrically connected to the first pressure sensor (402), the alarm (404), the second pressure sensor (405), the second flow sensor (406), and the first flow sensor (408).

3. The ultrafiltration membrane pressure detection device according to claim 1, characterized in that: The outer shell (1) is provided with an ultrafiltration membrane filter element (5), and the outer surfaces of both sides of the outer shell (1) are connected with fixing blocks (7), and the fixing blocks (7) are provided with two sets of springs (8).

4. The ultrafiltration membrane pressure detection device according to claim 3, characterized in that: A push plate (9) is connected to one side of each of the two sets of springs (8). The upper and lower ends of one side surface of the push plate (9) are respectively connected to a plug (11) and a top block (10). An automatic exhaust valve (409) is connected to the top of the drain port (3).

5. The ultrafiltration membrane pressure detection device according to claim 1, characterized in that: The inner walls on both sides of the top cover (2) are provided with guide grooves (12), and the inner walls of the guide grooves (12) are provided with insertion holes (6).

6. The ultrafiltration membrane pressure detection device according to claim 4, characterized in that: The push plate (9) and the spring (8) form an elastic structure. The side of the plug (11) is provided with a slanted opening. The plug (11) and the plug hole (6) form a plug-in connection.

7. The ultrafiltration membrane pressure detection device according to claim 5, characterized in that: The position and size of the guide groove (12) match the position and size of the fixing block (7).

Images