A connection module structure for membrane separation in wastewater treatment

Abstract

This invention relates to a connection module structure for membrane separation in wastewater treatment, aiming to solve problems in existing technologies such as inconvenient membrane element replacement, susceptibility to moisture-induced electrical connection failure, poor system scalability, uneven fluid distribution, and weak circuit anti-interference capability. The structure includes a membrane module unit, a connection module unit, and a circuit control unit. The membrane module unit uses parallel membrane elements, with standardized interfaces at both ends of its housing, including annular fluid channels and separate conductive terminals. The connection module unit incorporates a mating cavity matching the standardized interfaces, a multi-channel flow guiding structure, and circuit connection components. The circuit control unit includes power management, signal acquisition, communication interfaces, and control execution circuits. Through modular design and multi-physics field collaborative optimization, this invention achieves rapid assembly and disassembly, uniform fluid distribution, and reliable electrical circuit connections, significantly improving the maintenance efficiency, operational stability, and anti-interference capability of wastewater treatment systems.

Description

Technical Field

[0001] This invention provides a connection module structure, belonging to the field of wastewater treatment technology, and particularly relates to a connection module structure for membrane separation in wastewater treatment. Background Technology

[0002] The membrane separation connection module is a core component used for connecting and controlling membrane elements in wastewater treatment systems. Its main functions are to enable rapid assembly and disassembly of membrane elements, uniform fluid distribution, and reliable electrical circuit connections. Traditional membrane separation modules typically consist of membrane elements, connectors, and control circuits, using fixed welding or bolted connections. Replacing a single membrane element requires a complete shutdown and system disassembly, resulting in extremely low maintenance efficiency. Its basic structure includes fluid channels, electrical interfaces, and signal acquisition modules, but existing designs suffer from low modularity, susceptibility to moisture-induced failure of electrical interfaces, and uneven fluid distribution, making it difficult to meet the demands of industrial wastewater treatment for high efficiency, high reliability, and long lifespan.

[0003] Existing membrane separation connection modules suffer from significant performance bottlenecks. Firstly, traditional modules use conventional plug-in connectors for electrical connections, resulting in large contact resistance fluctuations (>200mΩ), which can easily lead to signal distortion and system malfunctions in humid environments. Secondly, their communication systems are based on a single-bus architecture, limiting node expansion capabilities (<32 nodes), and the communication failure rate after system expansion exceeds 25%, making it difficult to meet the needs of large-scale wastewater treatment. Furthermore, the fluid channel uses a straight-through design, leading to flow velocity deviations of >30%, accelerating membrane surface fouling, and shortening the fouling cycle to less than 400 hours. Existing modules have low circuit protection levels and weak anti-interference capabilities, resulting in an average monthly malfunction rate of >5 times under industrial field conditions. This application, through modular reconfiguration and multi-physics field collaborative optimization, systematically solves the shortcomings of traditional technologies in terms of maintenance efficiency, reliability, and energy consumption, significantly improving the operational economy and stability of wastewater treatment systems. Summary of the Invention

[0004] In order to solve the above problems, this application provides a connection module structure for membrane separation in wastewater treatment, which solves the problems of inconvenient membrane element replacement, electrical connection failure due to moisture, poor system scalability, uneven fluid distribution and weak circuit anti-interference ability in the prior art.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a connection module structure for membrane separation in wastewater treatment, comprising: a membrane module unit, a connection module unit, and a circuit control unit;

[0006] The membrane module unit comprises at least two membrane elements arranged in parallel. Each membrane element has a standardized interface at both ends of its housing. The standardized interface includes an annular fluid channel and a split conductive terminal. The annular fluid channel is embedded with a fluororubber sealing ring. The split conductive terminal includes an elastic contact piece and a waterproof pin.

[0007] The connection module unit includes: a connection body with an internal docking cavity matching a standardized interface; a multi-channel flow guiding structure including a flow guiding groove and a flow regulating valve; and a circuit connection assembly with elastic contacts corresponding to the split conductive terminals.

[0008] The circuit control unit includes: a power management circuit using an LM2596 voltage regulator module; a signal acquisition circuit integrating an ADS1115 analog-to-digital converter; a communication interface circuit using a CAN bus transceiver; and a control execution circuit including an IRF540 power MOSFET.

[0009] Preferably, the annular fluid channel of the standardized interface adopts a tapered flow channel design, with its inlet diameter being 15%-20% larger than its outlet diameter, and the inner wall of the channel is provided with spiral guide ribs.

[0010] Preferably, the docking cavity of the connecting body adopts a quick-release buckle structure, including: a rotating locking ring with 3 sets of L-shaped slots; a self-resetting spring made of 316 stainless steel; and an anti-misoperation limit pin that cooperates with the limit hole on the housing.

[0011] Preferably, the circuit connection component includes: a double-layer PCB substrate, with the bottom layer being power lines and the top layer being signal lines; an electromagnetic shielding layer, which adopts a copper-plated aluminum foil wrapping structure; and a self-diagnostic circuit, which includes a voltage comparator composed of a TLV9062 operational amplifier.

[0012] Preferably, the communication interface circuit adopts a dual redundancy design, including: a main communication channel based on the CAN2.0B protocol; a backup communication channel using an RS-485 interface; and an automatic switching module composed of a CD4066 analog switch.

[0013] Preferably, the control execution circuit includes: a PWM adjustment module using an SG3525 controller; an overcurrent protection module including an ACS712 current sensor; and a status feedback module integrating a PC817 optocoupler isolator.

[0014] Preferably, the signal acquisition circuit is connected to: a pressure sensor, using the MPX5100DP; a flow sensor, using the FS6122 type; and a conductivity probe, equipped with a TDS compensation circuit.

[0015] Preferably, the multi-channel flow guiding structure includes: a main flow distribution chamber with a volume of 1 / 3 to 1 / 2 of the membrane element chamber volume; eddy current suppression plates arranged at 45° staggered intervals; and self-cleaning nozzles connected to the backwashing pipeline.

[0016] Preferably, the power management circuit includes: a reverse connection protection module using SS34 Schottky diodes; a filter module consisting of a π-type LC filter; and an overvoltage protection module including a TVS diode array.

[0017] Preferably, the surface of the elastic contact piece is plated with a gold-nickel alloy layer with a thickness of 0.5-1μm, the contact pressure is 3-5N, and the contact resistance is less than 50mΩ.

[0018] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0019] This invention addresses the shortcomings of existing membrane separation connection technologies, such as low modularity, poor electrical connection reliability, insufficient system scalability, uneven fluid distribution, and weak anti-interference capabilities of the circuit system, by proposing a systematic solution. It achieves rapid replacement of single membrane components through standardized interfaces and quick-release snap-fit ​​structures; separate conductive terminals physically separate electrical connections from fluid channels, avoiding cross-contamination; a composite structure of gold-plated nickel alloy elastic contacts and waterproof pins, combined with an electromagnetic shielding layer and a π-type LC filter, reduces contact resistance fluctuations and electromagnetic interference; a dual-redundant communication architecture with analog switches enhances communication reliability and scalability; innovative tapered flow channels and eddy current suppression plates optimize fluid distribution uniformity and extend the fouling cycle; and a three-level protection circuit and optocoupler isolator enhance circuit anti-interference capabilities and significantly reduce malfunction rate. Furthermore, through a coupled mechanical-electrical-fluid design, multi-physics field collaborative optimization is performed from the physical layer, signal layer, to the fluid layer, effectively solving the industrialization bottlenecks of traditional technologies in terms of maintenance costs, operational stability, and energy consumption.

[0020] Other advantages, objectives and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination or study, or may be learned from the practice of the invention. Attached Figure Description

[0021] Figure 1 This is a system architecture diagram of a membrane separation connection module structure for wastewater treatment according to the present invention;

[0022] Figure 2 This is a timing diagram of the snap-fit ​​installation of a membrane separation connection module structure for wastewater treatment according to the present invention;

[0023] Figure 3This is a flowchart illustrating the electrical connection and signal transmission of a membrane separation connection module structure for wastewater treatment according to the present invention.

[0024] Figure 4 This is a diagram showing the distribution of a multi-channel flow guiding structure for a membrane separation connection module used in wastewater treatment according to the present invention.

[0025] Figure 5 This is a timing diagram of a dual-redundant communication architecture for a membrane separation connection module structure used in wastewater treatment according to the present invention.

[0026] Figure 6 This is a diagram showing the three-level protection of the power management circuit of a membrane separation connection module structure for wastewater treatment according to the present invention;

[0027] Figure 7 This is a flowchart illustrating the signal acquisition and feedback control of a membrane separation connection module structure for wastewater treatment according to the present invention. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] It should be noted that the terms "vertical," "horizontal," "up," "down," "left," "right," and similar expressions used in this article are for illustrative purposes only and do not represent the only possible implementation.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0031] like Figure 1-3As shown, a membrane separation connection module structure for wastewater treatment mainly consists of a membrane module unit, a connection module unit, and a circuit control unit. The membrane module unit includes at least two parallel membrane elements, each with a standardized interface at both ends of its housing. This interface includes an annular fluid channel and a separate conductive terminal. The annular fluid channel has an embedded fluororubber sealing ring, and the separate conductive terminal has an elastic contact piece and a waterproof pin. The connection module unit consists of a connection body (with an internal mating cavity matching the standardized interface), a multi-channel flow guiding structure (including a flow guiding groove and a flow regulating valve), and a circuit connection assembly (equipped with elastic contacts corresponding to the separate conductive terminals). The circuit control unit includes a power management circuit using an LM2596 voltage regulator module, a signal acquisition circuit integrating an ADS1115 analog-to-digital converter, a communication interface circuit using a CAN bus transceiver, and a control execution circuit including an IRF540 power MOSFET.

[0032] In this implementation plan, the connection and positional relationships of each unit are as follows:

[0033] 1. Mechanical and electrical connections between the membrane module unit and the connection module unit

[0034] Mechanical connection: The membrane element is inserted into the docking cavity of the connecting body through standardized interfaces at both ends, and locked by the L-shaped slot of the rotating locking ring to ensure axial fixation.

[0035] Fluid channel docking: The annular fluid channel and the guide groove in the docking cavity form a sealed connection, and the fluororubber sealing ring is deformed under pressure to achieve zero leakage.

[0036] Electrical connection: The waterproof pins of the split conductive terminals are inserted into the flexible contacts of the circuit connection assembly, and the flexible contact pieces ensure low-impedance conduction.

[0037] 2. Electrical connection between the module unit and the circuit control unit

[0038] Power Management: The power lines of the circuit connection components are connected to the LM2596 voltage regulator module of the power management circuit via copper busbars to provide a stable 12VDC.

[0039] Signal transmission: The signal line is connected to the ADS1115 analog-to-digital converter to collect sensor data such as pressure and flow.

[0040] Control execution: The IRF540 power MOSFET in the control execution circuit drives the shunt regulating valve through a PWM signal to achieve precise flow control.

[0041] 3. Optimized layout of multi-channel flow guiding structure

[0042] The main flow distribution chamber is located in the center of the connecting body and is radially connected to the flow channels of each membrane element to ensure balanced flow distribution.

[0043] The eddy current suppression plates are arranged in a staggered pattern at 45° to eliminate turbulence and make the fluid distribution uniformity >95%.

[0044] The self-cleaning nozzle is connected to the backwash line to periodically spray high-speed water to prevent membrane fouling.

[0045] In the above implementation scheme, the beneficial effects and innovations of the component combination are as follows:

[0046] 1. Modular quick-release structure improves maintenance efficiency

[0047] Innovation: Standardized interface + rotating locking ring enables quick assembly and disassembly via "plug-in-rotation", reducing replacement time from 120 minutes to 3 minutes compared to traditional bolt fixing.

[0048] Results: Maintenance downtime is reduced by 98%, making it suitable for industrial scenarios where membrane elements need frequent cleaning or replacement.

[0049] 2. Electrical-fluid dual-channel isolation design enhances reliability.

[0050] Innovation features: Separate conductive terminals are physically isolated from the fluid channels to avoid electrolytic corrosion; gold-plated nickel alloy contacts ensure low-resistance conductivity.

[0051] Results: In wastewater environments with humidity >90%, the electrical connection life is extended to 100,000 mating cycles, and the signal distortion rate is <1%.

[0052] 3. Intelligent flow regulation reduces membrane fouling

[0053] Innovation: The flow guide channel and PWM regulating flow divider valve form a closed-loop control system, which dynamically adjusts the flow rate based on the data collected by ADS1115.

[0054] Results: Membrane surface flow rate uniformity increased to 95%, fouling deposition rate decreased by 72%, and backwashing cycle extended to 1200 hours.

[0055] 4. Dual redundancy communication ensures system stability

[0056] Innovation: The CAN bus and RS-485 are automatically switched via a CD4066 analog switch, with a switching delay of <5ms.

[0057] Results: The communication system has a mean time between failures (MTBF) of 25,000 hours, making it suitable for high-interference industrial environments.

[0058] 5. Three-level circuit protection enhances safety.

[0059] Innovation features: triple protection including reverse connection protection, overvoltage protection, and overcurrent protection.

[0060] Results: The system has a surge protection capability of 4kV / 2kA, and the failure rate is reduced to <0.1 times / year.

[0061] like Figure 4-7 As shown, the membrane separation connection module structure for wastewater treatment incorporates numerous improvements. The standardized interface's annular fluid channel features a tapered flow channel design, with the inlet diameter 15%-20% larger than the outlet diameter, and spiral guide ribs on the inner wall. The connection body's docking cavity employs a quick-release snap-fit ​​structure, consisting of a rotating locking ring (with three L-shaped slots), a 316 stainless steel self-resetting spring, and anti-misoperation limit pins that mate with the housing's limiting holes. The circuit connection components include a double-layer PCB substrate (bottom layer for power lines, top layer for signal lines), an electromagnetic shielding layer wrapped with copper-plated aluminum foil, and a self-diagnostic circuit containing a voltage comparator based on a TLV9062 operational amplifier. The communication interface circuit adopts a dual-redundancy design, featuring a main communication channel based on the CAN2.0B protocol, a backup communication channel using an RS-485 interface, and an automatic switching module composed of a CD4066 analog switch. The control and execution circuit includes a PWM regulation module using an SG3525 controller, an overcurrent protection module with an ACS712 current sensor, and a status feedback module integrating a PC817 optocoupler isolator. The signal acquisition circuit connects to a pressure sensor using an MPX5100DP, a flow sensor using an FS6122 type, and a conductivity probe equipped with a TDS compensation circuit. The multi-channel flow guiding structure includes a main shunt chamber with a volume of 1 / 3 to 1 / 2 of the membrane element cavity volume, eddy current suppression plates arranged at 45° staggers, and self-cleaning nozzles connected to the backwash line. The power management circuit includes a reverse connection protection module using SS34 Schottky diodes, a filtering module composed of a π-type LC filter, and an overvoltage protection module containing a TVS diode array. Furthermore, the elastic contact surface is plated with a 0.5-1μm thick gold-nickel alloy layer, with a contact pressure of 3-5N and a contact resistance of less than 50mΩ.

[0062] In this implementation plan, the key points of implementation and quantitative parameters of each structure are detailed as follows:

[0063] 1. Optimization of tapered flow channels with standardized interfaces

[0064] Basic structure: The annular fluid channel adopts a tapering design with a large inlet and a small outlet. The inlet diameter is 15% to 20% larger than the outlet diameter, and the inner wall is equipped with spiral guide ribs.

[0065] Key points for implementation:

[0066] The tapered flow channel reduces fluid resistance, increasing flow velocity by 20% to 30%.

[0067] Spiral guide ribs induce swirling flow, enhance shear force on the membrane surface, and reduce fouling deposition.

[0068] Quantization parameters:

[0069] Inlet diameter: 25mm

[0070] Outlet diameter: 21mm

[0071] Guide rib helix angle: 30°

[0072] 2. Mechanical optimization of quick-release buckle structure

[0073] Basic components: a rotary locking ring with 3 sets of L-shaped slots, a 316 stainless steel self-resetting spring, and a limit pin to prevent misoperation.

[0074] Key points for implementation:

[0075] The rotating locking ring only needs to be rotated 60° to lock / unlock, with an operation time of less than 3 seconds.

[0076] The self-resetting spring provides a preload of 5–8 N, ensuring a seal compression of 1.2 mm.

[0077] Quantization parameters:

[0078] Buckle tightening torque: 2.5 N·m

[0079] Spring fatigue life: >100,000 cycles

[0080] 3. Anti-interference design of circuit connection components

[0081] Basic components: double-layer PCB substrate, copper-plated aluminum foil shielding layer, TLV9062 voltage comparator.

[0082] Key points for implementation:

[0083] Power lines and signal lines are routed separately to reduce crosstalk.

[0084] The self-diagnostic circuit monitors the contact resistance in real time and triggers an alarm when abnormalities occur.

[0085] Quantization parameters:

[0086] Electromagnetic shielding effectiveness: >40dB

[0087] Voltage comparator response time: <10μs

[0088] 4. Reliability assurance of dual redundant communication interfaces

[0089] Basic components: CAN2.0B main channel, RS-485 backup channel, CD4066 automatic switching module.

[0090] Key points for implementation:

[0091] The main channel supports a communication rate of 1Mbps and a node capacity of 110.

[0092] The backup channel automatically switches in the event of a CAN bus failure, with a switching delay of less than 5ms.

[0093] Quantization parameters:

[0094] CAN bus bit error rate: <10 -7

[0095] RS-485 transmission distance: 1200m

[0096] 5. Precise drive of the control and execution circuit

[0097] Basic components: SG3525 PWM controller, ACS712 current sensor, PC817 optocoupler isolator.

[0098] Key points for implementation:

[0099] The PWM regulation module outputs a 100kHz signal with a duty cycle accuracy of ±1%.

[0100] The overcurrent protection threshold is set to 10A, and the response time is <1ms.

[0101] Quantization parameters:

[0102] PWM adjustment range: 5% to 95%

[0103] Optocoupler isolation withstand voltage: 3000Vrms

[0104] 6. Fluid optimization of multi-channel flow guiding structure

[0105] Basic components: main flow chamber, 45° vortex suppression plate, self-cleaning nozzle.

[0106] Key points for implementation:

[0107] The main shunt chamber volume is 1 / 3 to 1 / 2 of the membrane element chamber to ensure pressure balance.

[0108] The staggered arrangement of eddy current suppression plates ensures a flow distribution uniformity of >95%.

[0109] Quantization parameters:

[0110] Nozzle jet velocity: 3m / s

[0111] Flow channel pressure drop: <0.05MPa

[0112] 7. Safety protection of power management circuits

[0113] Basic components: SS34 reverse connection protection module, π-type LC filter, TVS overvoltage protection array.

[0114] Key points for implementation:

[0115] The LC filter has a cutoff frequency of 1kHz and a ripple rejection ratio of >60dB.

[0116] TVS diodes have a response time of <1ns and can absorb 4kV surges.

[0117] Quantization parameters:

[0118] Voltage regulation output accuracy: ±1%

[0119] Overvoltage protection threshold: 36V

[0120] 8. Durability design of conductive terminals

[0121] Basic components: gold-plated nickel alloy elastic contact piece, waterproof pin.

[0122] Key points for implementation:

[0123] The coating thickness is 0.5–1 μm to ensure corrosion resistance.

[0124] Contact pressure of 3-5N ensures low contact resistance.

[0125] Quantization parameters:

[0126] Insertion / removal life: >100,000 times

[0127] Operating temperature: -40℃~85℃

[0128] In practice, the existing technical solutions and methods involved in this solution include: Membrane element installation uses a standardized flange connection, with bolt tightening for sealing. A torque wrench (standard torque value 25-30 N·m) is required during installation to ensure uniform force on the sealing surface; the circuit system of the connection module uses industrial-grade terminal blocks (such as Phoenix Contact's PT series) for cable connection, and the power input uses a standard IEC 60320C13 interface; during system operation, it needs to cooperate with an existing PLC control system (such as Siemens S7-1200 series) for data acquisition and control command issuance. The PLC communicates with various sensors via the Modbus RTU protocol; backwashing operation requires connection to an existing high-pressure cleaning pump (working pressure 0.3-0.5 MPa) and a chemical cleaning agent dosing device (such as Grundfos DDA series). The cleaning cycle is automatically triggered based on the transmembrane pressure difference (TMP) value (set threshold 50 kPa); flow regulation uses existing electric regulating valves (such as Samson). The 4763 model executes PWM control signals, and the valve position feedback signal (4-20mA) is connected to the control system. During system commissioning, a standard resistance box (such as Fluke 744) is needed to calibrate the signal acquisition circuit, and an oscilloscope (such as the Tektronix TBS2000 series) is needed to check the PWM waveform quality. For routine maintenance, an existing infrared thermal imager (such as FLIR E8) is needed to check the temperature rise of electrical connection points, and a megohmmeter (such as Megger MIT515) is needed to periodically check the insulation resistance (standard value > 100MΩ). When replacing membrane elements, a dedicated hoisting equipment (such as Gorbel G-Jib) is needed for handling, and a laser alignment instrument (such as Prüftechnik Optalign) is needed to ensure the coaxiality of the new module (deviation < 0.1mm). The entire system's operating data is centrally monitored through an existing SCADA system (such as WonderwareIntouch), with historical data storage lasting at least 5 years. Alarm information is pushed to maintenance personnel in real time through an existing SMS alarm module (such as Siemens ALM-2410).

[0129] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Anyone skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the claims.

Claims

1. A connection module structure for membrane separation in wastewater treatment, characterized in that, include: Membrane module unit, connection module unit, and circuit control unit; The membrane module unit includes at least two membrane elements arranged in parallel. Each membrane element has a standardized interface at both ends of its housing. The standardized interface includes an annular fluid channel and a separate conductive terminal, which is physically isolated from the fluid channel. The annular fluid channel is embedded with a fluororubber sealing ring; the split conductive terminal includes an elastic contact piece and a waterproof pin. The connection module unit includes: a connection body with an internal docking cavity that matches a standardized interface; a multi-channel flow guiding structure; and a circuit connection component with elastic contacts corresponding to the split conductive terminals. The annular fluid channel forms a sealed connection with the guide groove in the docking cavity; The circuit control unit includes: a power management circuit, employing an LM2596 voltage regulator module; and a signal acquisition circuit, integrating... ADS1115 analog-to-digital converter; communication interface circuit using a CAN bus transceiver; control execution circuit, including IRF540. Power MOSFET; The standardized interface has an annular fluid channel with a tapered flow channel design, where the diameter of the inlet end is 15%-20% larger than that of the outlet end, and the inner wall of the channel is provided with spiral guide ribs. The docking cavity of the connecting body adopts a quick-release buckle structure, including: a rotating locking ring with 3 sets of L-shaped slots; a self-resetting spring made of 316 stainless steel; and an anti-misoperation limit pin that cooperates with the limit hole on the housing. The multi-channel flow guiding structure includes: a main flow diversion chamber with a volume of 1 / 3 to 1 / 2 of the membrane element chamber volume; eddy current suppression plates arranged at 45° staggered intervals; self-cleaning nozzles connected to backwashing pipelines; and a flow diversion regulating valve. The main shunt cavity is located in the center of the connecting body and is radially connected to the flow channels of each membrane element.

2. The connection module structure for membrane separation in wastewater treatment according to claim 1, characterized in that: The circuit connection component includes: A double-layer PCB substrate, with power lines on the bottom layer and signal lines on the top layer; The electromagnetic shielding layer is wrapped with copper-plated aluminum foil. The self-diagnostic circuit includes a voltage comparator composed of a TLV9062 operational amplifier.

3. The connection module structure for membrane separation in wastewater treatment according to claim 1, characterized in that: The communication interface circuit adopts a dual redundancy design and includes: The main communication channel is based on the CAN2.0B protocol. Backup communication channel, using RS-485 interface; The automatic switching module consists of a CD4066 analog switch.

4. The connection module structure for membrane separation in wastewater treatment according to claim 1, characterized in that: The control execution circuit includes: a PWM adjustment module, an overcurrent protection module, and a status feedback module.

5. The connection module structure for membrane separation in wastewater treatment according to claim 1, characterized in that: The signal acquisition circuit is connected to: a pressure sensor, a flow sensor, and a conductivity probe, equipped with a TDS compensation circuit.

6. The connection module structure for membrane separation in wastewater treatment according to claim 1, characterized in that: The power management circuit includes: The reverse polarity protection module uses an SS34 Schottky diode. The filtering module consists of a π-type LC filter; Overvoltage protection module, including TVS diode array.

7. The connection module structure for membrane separation in wastewater treatment according to claim 1, characterized in that: The surface of the elastic contact piece is plated with a gold-nickel alloy layer with a thickness of 0.5-1μm, the contact pressure is 3-5N, and the contact resistance is less than 50mΩ.

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