Multilayer annular membrane assembly and pulse reverse self-cleaning system

Abstract

The invention belongs to the technical field of gas separation, and particularly provides a multilayer annular membrane assembly and a pulse reverse self-cleaning system. The multi-layer annular membrane assembly comprises a central tube, a membrane tow and a shell. The pulse reverse self-cleaning system comprises a sensing detection unit, a central control unit, a high-speed execution unit, a power air source unit and a man-machine interaction unit. Compared with a slender membrane assembly in the prior art, the volume of the multi-layer annular membrane assembly with the same treatment efficiency is reduced by 30%-50%, and the multi-layer annular membrane assembly can be directly deployed in narrow spaces such as roadways and chambers, so that near-point nitrogen supply is realized, pipelines are shortened, and the response speed and safety are improved; external pressure type air inlet and a built-in central tube are adopted, so that the pressure resistance of the membrane tow is greatly improved, and the impact of pulse cleaning can be borne; according to the pulse reverse self-cleaning system, the problem of membrane pollution caused by an underground high-dust environment is fundamentally solved, long-term stability of nitrogen production purity and flow is ensured, and the underground disassembly-free maintenance period of a membrane assembly is prolonged by 3-5 times.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of gas separation, and particularly provides a multi-layer annular membrane assembly and a pulse reverse self-cleaning system. BACKGROUND

[0002] In the safety production of coal mines, using nitrogen for fire prevention in goaf and gas drilling deslagging is an important and commonly used technology. Membrane separation nitrogen production technology is increasingly applied in the field of coal mines due to its characteristics of no moving parts, fast start, etc. The principle is to separate nitrogen and oxygen by using the different permeation rates of components in air in hollow fiber membranes. However, when applied in underground coal mines, there are technical bottlenecks: Large contradiction between equipment volume and underground space: In order to achieve gas production, a large number of membrane fibers need to be arranged in the membrane assembly of the traditional membrane separation nitrogen production machine, resulting in large equipment volume and long length. However, the underground space is limited, making installation and transportation difficult, which limits the ability to arrange nearby and respond quickly.

[0003] Membrane assembly is easily contaminated and has serious performance degradation: Coal dust, rock powder and high humidity in the underground air make impurities enter the membrane system, adsorb and deposit on the surface and micropores of the membrane fibers, block the membrane pores and form a covering layer, which hinders gas separation, resulting in a decrease in nitrogen production, a decrease in purity and an increase in operating pressure. This is the main cause of unstable and failed equipment performance.

[0004] Maintenance difficulty affects continuous production: Existing technologies rely on pre-positioned precision filtration systems for protection, but the filter is easily saturated in the underground environment, requiring frequent filter replacement and a large amount of maintenance. After the protection fails, the membrane assembly is contaminated and lacks online in-situ cleaning means. Usually, it needs to be disassembled, cleaned or replaced, which results in long downtime, high cost, affects the continuity of fire prevention and extinguishing, and brings safety hazards.

[0005] Existing cleaning technology has poor adaptability: The membrane assembly cleaning technology of some ground industrial equipment does not consider the high pressure and high dust working conditions in the underground environment. The internal pressure separation method cannot achieve automatic backflushing cleaning and may accelerate the damage of the membrane fibers. Moreover, the cleaning system is an independent additional device, which increases the complexity and space occupation of the system. SUMMARY

[0006] To solve the above technical problems, the technical scheme adopted by the present application is: a multi-layer annular membrane assembly, comprising a center tube, a membrane filament bundle and an outer shell, the center tube and the membrane filament bundle are arranged inside the outer shell, the two ends of the side wall of the center tube are provided with insertion holes, the membrane filament bundle is spirally wound outside the center tube, the two ends of the membrane filament bundle extend into the lumen of the center tube through the two insertion holes respectively, the center tube is a blind tube with one end open and the other end closed, the lumen of the center tube is an oxygen flow cavity, a gap is left between the inner wall of the outer shell and the outer wall of the membrane filament bundle, the gap is a mixed gas flow cavity, an air inlet, a nitrogen outlet and an oxygen outlet are respectively provided on the outer shell, the air inlet and the nitrogen outlet are communicated with the mixed gas flow cavity, and the air inlet and the nitrogen outlet are respectively located at the two ends of the mixed gas flow cavity, and the oxygen outlet is communicated with the oxygen flow cavity.

[0007] Further, the two ends of the membrane filament bundle are bonded with the insertion holes by epoxy resin casting packaging.

[0008] Further, the oxygen outlet and the air inlet are located on the same side.

[0009] Further, the outer shell comprises a sleeve, a first end cover and a second end cover, the first end cover and the second end cover are respectively assembled at the two ends of the sleeve, the nitrogen outlet is arranged on the first end cover or the second end cover, and correspondingly, the oxygen outlet is arranged on the second end cover or the first end cover.

[0010] Further, the air inlet is tangentially arranged on the sleeve.

[0011] Further, the outer shell is further provided with a cleaning port and a sewage discharge port, the cleaning port and the sewage discharge port are arranged on the first end cover or the second end cover, and the cleaning port and the sewage discharge port are located on the same side as the nitrogen outlet.

[0012] A pulse reverse self-cleaning system, comprising a sensing detection unit, a central control unit, a high-speed execution unit, a power gas source unit and a man-machine interaction unit, the sensing detection unit, the high-speed execution unit, the power gas source unit and the man-machine interaction unit are electrically connected with the central control unit through lines or wireless signals, the power gas source unit, the high-speed execution unit and the multi-layer annular membrane assembly are communicated with each other through pipelines; The sensing detection unit is used for collecting the running state parameters of the membrane separation nitrogen making unit; The sensing detection unit is the logical input source of the central control unit, and provides the decision basis for the central control unit; The central control unit is the core decision and command center of the system, and is installed in an explosion-proof control cabinet; The central control unit is the logical instruction source of the high-speed execution unit, and the PLC sends opening and closing instructions to the specified valve according to the internal program and the optimized parameters of the intelligent gateway; The high-speed execution unit is used for controlling switching and pulse cleaning of the gas passage, and can receive instructions of the central control unit; The high-speed execution unit is a consumption unit and a control object of the power gas source unit, and the valve action controls the on-off and flow direction of the high-pressure gas; The high-speed execution unit comprises a pneumatic valve group, a valve island and an electromagnetic pilot component. The pneumatic valve group comprises: An air inlet main pipe cut-off valve is arranged on a compressed air inlet pipe connected to an air inlet of the membrane assembly. A nitrogen gas main pipe cut-off valve is arranged on a nitrogen gas outlet pipe connected to a nitrogen gas outlet of the membrane assembly. The pulse injection valve is a key execution component of the application, which is a high-speed response electromagnetic valve, the inlet of which is connected to a high-pressure storage tank, and the outlet is connected to a cleaning port of the membrane assembly through a pipeline. A blowdown valve is arranged at a blowdown port of the membrane assembly. The valve island and the electromagnetic pilot component are used for centralized driving and control of the pneumatic valve group. The power gas source unit provides compressed air required for cleaning and driving of the execution unit. The human-computer interaction unit is used for displaying system process flow, real-time parameters, historical curves and alarm information, and providing parameter setting and manual operation interface, and is an upper information interaction port of the central control unit, realizing bidirectional communication of instruction issuing and state monitoring.

[0013] Further, the sensing and detecting unit comprises a differential pressure sensor module, a purity analysis module, a flow monitoring module, a pressure monitoring module and a valve position feedback module.

[0014] Further, the central control unit comprises a programmable logic controller and an edge computing intelligent gateway.

[0015] Further, the power gas source unit comprises a high-pressure gas storage tank and an instrument gas source processing assembly.

[0016] The application has the following advantages: Compared with the existing long membrane assembly, the volume of the multi-layer annular membrane assembly of the application is reduced by 30%-50% under the same processing efficiency, and can be directly deployed in narrow spaces such as roadways and chambers, realizing near-point nitrogen supply, shortening the pipeline, and improving the response speed and safety. The outer pressure type air inlet has a built-in center pipe, which greatly improves the pressure resistance of the membrane bundle and can withstand the impact of pulse cleaning. The pulse reverse self-cleaning system fundamentally solves the membrane pollution problem caused by the high-dust environment in the mine, ensures the long-term stability of the nitrogen production purity and flow, and prolongs the maintenance period of the membrane assembly in the mine by 3-5 times. The adaptive cleaning strategy based on multiple sensing avoids over-cleaning or under-cleaning, maximizes the service life of the membrane assembly while ensuring the effect, and greatly reduces the workload and cost of manual inspection, replacement of filter cartridges and disassembly and washing of the membrane assembly; The standard module design is that each part and functional module is an independent module, the number of modules can be flexibly increased or decreased according to the requirements of the staff, the change of the working environment can be adapted, and the initial investment and the complexity of the later reconstruction are reduced. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is an external structure schematic diagram of the application; Figure 2 It is a membrane filament bundle structure schematic diagram of the application; Figure 3 It is a center tube structure schematic diagram of the application; Figure 4 It is a connection relationship schematic diagram of the membrane assembly and the self-cleaning device of the application; Figure 5 It is a working flow chart of the pulse reverse self-cleaning system of the application; The reference signs include: 1, center tube; 101, insertion hole; 2, membrane filament bundle; 3, sleeve; 301, first end cover; 302, second end cover; 4, gas inlet; 5, nitrogen gas outlet; 6, oxygen gas outlet; 7, cleaning port; 8, sewage outlet. DETAILED DESCRIPTION

[0018] The application will be described in detail below in combination with the drawings.

[0019] Referring to Figures 1-3 A multi-layer annular membrane assembly, comprising a center tube 1, a membrane filament bundle 2 and a shell, the center tube 1 and the membrane filament bundle 2 are arranged inside the shell, insertion holes 101 are formed at both ends of the side wall of the center tube 1, the membrane filament bundle 2 is spirally wound outside the center tube 1, both ends of the membrane filament bundle 2 extend into the lumen of the center tube 1 by penetrating through the two insertion holes 101 respectively, the center tube 1 is a blind tube with one end open and the other end closed, the lumen of the center tube 1 is an oxygen flow cavity, a gap is left between the inner wall of the shell and the outer wall of the membrane filament bundle 2, which is a mixed gas flow cavity, a gas inlet 4, a nitrogen gas outlet 5 and an oxygen gas outlet 6 are formed on the shell respectively, the gas inlet 4 and the nitrogen gas outlet 5 are in communication with the mixed gas flow cavity, and the gas inlet 4 and the nitrogen gas outlet 5 are located at both ends of the mixed gas flow cavity respectively, the oxygen gas outlet 6 is in communication with the oxygen flow cavity.

[0020] When the multi-layer annular membrane assembly is in operation, high-pressure air enters through the air inlet 4, passes through the mixed gas flow cavity, and flows out from the nitrogen outlet 5. In the flow process, oxygen molecules in the high-pressure air penetrate through the outer wall of the membrane wire into the membrane wire, and flow through the internal passage of the membrane wire to the oxygen flow cavity. The gas flowing through the mixed gas flow cavity to the nitrogen outlet 5 is nitrogen, and the oxygen molecules are discharged from the oxygen outlet 6 through the oxygen flow cavity.

[0021] The design adopts an external pressure method for air intake, and compressed air flows in a relatively wide membrane wire inter-shell space. Dust mainly adheres to the outer surface of the membrane wire. The requirement for pre-filtering is relatively low. Dust mainly affects the permeation efficiency of the outer surface of the membrane wire, but will not cause irreversible flow passage blockage, leaving intervention space for the self-cleaning system of the present application, and higher fault tolerance. The membrane wire bundle 2 is wound and stacked through the center pipe 1 to form a cylindrical membrane stack with a diameter much smaller than its length. This design greatly optimizes the space utilization, reduces the diameter of the equipment by about 40% under the same membrane area, and makes the length more controllable, facilitating underground transportation and installation. If the same volume of membrane bundle is used, the volume of the entire membrane separation assembly (container) can remain unchanged or be substantially the same, but the "effective volume utilization" and "membrane area packing density" inside the assembly have changed greatly.

[0022] The center pipe 1 inside serves as a framework to support the membrane wire bundle 2, improving the external pressure that the membrane wire bundle 2 can withstand.

[0023] Preferably, the membrane wire bundle 2 is bundled with membrane wires made of high-molecular membrane material (such as polysulfone and polyimide) with good flexibility and high toughness. The spiral winding process adopts a "gradient curvature" winding process. During the winding process from the inner circle to the outer circle, the membrane wire is naturally bent at different radial positions through tension control, avoiding the occurrence of extreme small radius bending in local areas. The junction between the two ends of the membrane wire bundle 2 and the jack 101 is cast and packaged with epoxy resin. When the epoxy resin is cast and packaged, the resin will infiltrate and solidify in the local part of the outermost and innermost circles of the membrane wire bundle 2, playing a role in fixing and supporting and stress buffering. Fixing and supporting: the inner and outer circle membrane wires that bear the maximum stress are anchored in the solid resin end plate to prevent them from rebounding or moving during use, thereby stabilizing the stress state. Stress buffering: the solidified resin acts as a rigid support body, bearing most of the macro stress generated by pressure pulses and vibrations, protecting the membrane wires in the middle active separation section of the annular membrane layer, so that they mainly bear uniform radial pressure rather than bending stress.

[0024] Preferably, the oxygen outlet 6 and the air inlet 4 are located on the same side.

[0025] Specifically, the shell comprises a sleeve 3, a first end cover 301 and a second end cover 302, the first end cover 301 and the second end cover 302 are respectively assembled at both ends of the sleeve 3, the nitrogen outlet 5 is arranged on the first end cover 301 or the second end cover 302, and the corresponding oxygen outlet 6 is arranged on the second end cover 302 or the first end cover 301 respectively.

[0026] Further, the gas inlet 4 is tangentially arranged on the sleeve 3.

[0027] In addition, the shell is further provided with a cleaning port 7 and a blowdown port 8, the cleaning port 7 and the blowdown port 8 are arranged on the first end cover 301 or the second end cover 302, and the cleaning port 7 and the blowdown port 8 are located on the same side as the nitrogen outlet 5, and the cleaning port 7 and the blowdown port 8 are in communication with the mixed gas flow passage.

[0028] Referring to Figure 4 and Figure 5 , a pulse reverse self-cleaning system comprises a sensing detection unit, a central control unit, a high-speed execution unit, a power gas source unit and a man-machine interaction unit, the sensing detection unit, the high-speed execution unit, the power gas source unit and the man-machine interaction unit are electrically connected with the central control unit through a line or a wireless signal, and the power gas source unit, the high-speed execution unit and a multi-layer annular membrane assembly are connected with each other through a pipeline; The sensing detection unit is used for collecting the running state parameters of the membrane separation nitrogen making unit; The sensing detection unit is a logical input source of the central control unit and provides a decision basis for the central control unit; The central control unit is a core decision and command center of the system and is installed in an explosion-proof control cabinet; The central control unit is a logical instruction source of the high-speed execution unit, and the PLC sends opening and closing instructions to the specified valve according to the internal program and the optimized parameters of the intelligent gateway; The high-speed execution unit is used for controlling the switching and pulse cleaning action of the gas passage and can receive the instructions of the central control unit; The high-speed execution unit is a consumption unit and a control object of the power gas source unit, and the valve action controls the on-off and flow direction of the high-pressure gas; The high-speed execution unit comprises a pneumatic valve group, a valve island and an electromagnetic pilot component; The pneumatic valve group comprises: An air inlet main pipe cut-off valve V1 is located on a compressed air inlet pipeline, and the air inlet pipeline is connected to the air inlet 4 of the membrane assembly; A nitrogen main pipe cut-off valve V2 is located on a product nitrogen output pipeline, and the nitrogen output pipeline is connected to the nitrogen outlet 5 of the membrane assembly; The pulse jet valve V3, which is a key execution component of the present application, adopts a high-speed response electromagnetic valve, the inlet of which is connected with the high-pressure storage tank, and the outlet is connected with the cleaning port 7 of the membrane module through a pipeline; The blowdown valve V4 is installed at the blowdown port 8 of the membrane module; The valve island and the electromagnetic pilot component are used for centralized driving and control of the pneumatic valve group; The power gas source unit provides compressed air required for cleaning and driving of the execution unit; The human-computer interaction unit is used for displaying system process flow, real-time parameters, historical curves and alarm information, and providing parameter setting and manual operation interface. The human-computer interaction unit is an upper information interaction port of the central control unit, and realizes bidirectional communication of instruction issuing and state monitoring.

[0029] Preferably, the pressure of the standard pulse is about 1.3-1.5 times of the working pressure, the duration is 0.1-0.5 seconds, and the pulse frequency is set to 0.15 seconds / time.

[0030] In the application process of the system, the membrane stack pressure difference and nitrogen purity are collected in real time by the sensing and detecting unit, the central control unit performs multi-parameter fusion judgment, the user sets the cleaning trigger threshold value according to the nitrogen production demand and the membrane group blockage degree and flow variation curve, and the cleaning process is triggered when the parameters returned by the sensing and detecting unit meet the threshold value; The central control unit issues an instruction, the equipment enters the cleaning mode, the high-speed execution unit acts according to a strict time sequence, the air inlet main pipe cut-off valve V1 and the nitrogen gas main pipe cut-off valve V2 are first closed, then the blowdown valve V4 is opened, and finally the pulse jet valve V3 is opened instantaneously to release a high-pressure pulse. The high-pressure pulse gas enters the mixed gas flow cavity in a reverse direction, flushes the outer surface of the membrane filament bundle 2, and the dirt is discharged from the blowdown port 8. After cleaning, the system reopens the air inlet main pipe cut-off valve V1 and the nitrogen gas main pipe cut-off valve V2, closes the pulse jet valve V3 and the blowdown valve V4, and returns to the normal nitrogen production mode. The central control unit has a built-in self-adjusting logic. After the unit reenters the nitrogen production mode, the central control unit records the pressure difference recovery value after this cleaning, and incorporates it into the algorithm model. If the recovery effect is better than expected, the trigger threshold value of the next cleaning can be slightly relaxed, further extending the cleaning period. Otherwise, the trigger threshold value is reduced, and the cleaning mode duration is extended or the pulse intensity is increased.

[0031] Preferably, the cleaning process is listed as part of the periodic routine maintenance work. During the interval between two cleanings, the amount of dust attached to the surface of the membrane filament bundle 2 is limited, and the dust attached is relatively loose. A single standard pulse is sufficient to strip most of the dust. Therefore, under normal circumstances, using a single standard pulse as a cleaning cycle is the cleaning scheme with the lowest energy consumption, the shortest time consumption and the smallest impact on the mechanical fatigue of the membrane filament.

[0032] The system also has a deep cleaning mode. If the performance does not recover significantly after the standard mode, or the humidity sensor detects that the air inlet is abnormally humid, the system will start the deep cleaning mode. Apply 3-5 times of strength increasing pulse continuously, and accompany with certain voltage stabilization soaking time, to remove stubborn attachments.

[0033] Taking the equipment with an initial working pressure difference of 50kPa as an example, the power gas source unit can output 1.0MPa high-pressure gas flow; When the pressure difference rises to the preset threshold of 80kPa, the cleaning mode is started.

[0034] Specifically, the sensing detection unit includes a pressure difference sensor module, a purity analysis module, a flow monitoring module, a pressure monitoring module, and a valve position feedback module. The pressure difference sensing module is composed of a first pressure difference transmitter and a second pressure difference transmitter. The first pressure difference transmitter is connected across the compressed air total inlet and the product nitrogen total outlet of the membrane stack, used for monitoring the overall filtration resistance of the membrane stack. The second pressure difference transmitter is connected across the inlet and outlet cavities of a representative membrane layer assembly, used for auxiliary monitoring and diagnosis. The purity analysis module is composed of an online infrared gas analyzer, whose sampling probe is directly installed on the product nitrogen outlet pipeline, used for real-time monitoring of the concentration of product nitrogen. The flow monitoring module includes an inlet mass flow meter and a product gas mass flow meter, respectively installed on the inlet main pipe and the product nitrogen outlet pipe. The pressure monitoring module includes an inlet pressure sensor and a storage tank pressure sensor. The valve position feedback module is composed of valve position transmitters installed on each key pneumatic valve, used for feeding back the open and closed states of the valves.

[0035] The central control unit includes a programmable logic controller and an edge computing intelligent gateway. The programmable logic controller uses a mine-used intrinsic safety type PLC with high-speed digital input / output modules and analog input modules, used for real-time data acquisition, logic judgment, and sequence control program.

[0036] The edge computing intelligent gateway is in communication connection with the PLC, with built-in adaptive cleaning algorithm model and digital twin lightweight model, used for data advanced analysis, cleaning strategy optimization, and performance prediction.

[0037] The power gas source unit includes a high-pressure gas storage tank and an instrument gas source processing assembly. The high-pressure gas storage tank is used for storing clean and dry compressed air as a special gas source for pulse cleaning, and its outlet pipeline is connected to the inlet of the pulse jet valve (V3).

[0038] Instrument air source processing assembly: including filter and pressure reducing valve, the gas of downhole pressure wind pipe network is processed as stable, clean low pressure gas source, the driving cylinder of pneumatic valve group is provided with power.

[0039] Preferably, the human-computer interaction unit adopts an explosion-proof touch screen and is directly assembled on the local device.

[0040] The above merely describes the preferred embodiments of the present application, and for those skilled in the art, many changes can be made to the specific embodiments and application ranges according to the idea of the present application, as long as these changes do not deviate from the concept of the present application, and all belong to the protection scope of the present application.

Claims

1. A multilayer annular membrane module, characterized in that: The device includes a central tube, a membrane fiber bundle, and a housing. Both the central tube and the membrane fiber bundle are located inside the housing. Insertion holes are provided at both ends of the side wall of the central tube. The membrane fiber bundle is spirally wound around the outside of the central tube, and both ends of the membrane fiber bundle extend through the two insertion holes into the lumen of the central tube. The central tube is a blind tube with one end open and the other end closed. The lumen of the central tube is an oxygen flow chamber. A gap is left between the inner wall of the housing and the outer wall of the membrane fiber bundle. This gap is a mixed gas flow chamber. An air inlet, a nitrogen outlet, and an oxygen outlet are provided on the housing. The air inlet and the nitrogen outlet are both connected to the mixed gas flow chamber, and the air inlet and the nitrogen outlet are located at the two ends of the mixed gas flow chamber, respectively. The oxygen outlet is connected to the oxygen flow chamber.

2. The multilayer annular membrane module according to claim 1, characterized in that: The two ends of the membrane fiber bundle are encapsulated with epoxy resin at the junction with the insertion hole.

3. A multilayer annular membrane module according to claim 1, characterized in that: The oxygen outlet and the air inlet are located on the same side.

4. A multilayer annular membrane module according to claim 1, characterized in that: The outer casing includes a sleeve, a first end cap, and a second end cap. The first end cap and the second end cap are respectively assembled at both ends of the sleeve. The nitrogen outlet is located on the first end cap or the second end cap, and correspondingly, the oxygen outlet is located on the second end cap or the first end cap.

5. A multilayer annular membrane module according to claim 1, characterized in that: The air inlet is tangentially positioned on the sleeve.

6. A multilayer annular membrane module according to claim 1, characterized in that: The outer casing is also provided with a cleaning port and a drain port, both of which are located on the first end cover or the second end cover, and the cleaning port and the drain port are located on the same side as the nitrogen outlet.

7. A pulse reverse self-cleaning system, characterized in that: It includes a sensing and detection unit, a central control unit, a high-speed execution unit, a power air source unit, and a human-machine interaction unit. The sensing and detection unit, the high-speed execution unit, the power air source unit, and the human-machine interaction unit are all electrically connected to the central control unit via lines or wireless signals. The power air source unit, the high-speed execution unit, and the multi-layer annular membrane assembly are interconnected through pipelines. The sensing and detection unit is used to collect the operating status parameters of the membrane separation nitrogen generator unit; The perception and detection unit is the logical input source for the central control unit, providing it with the basis for decision-making; The central control unit is the core decision-making and command center of the system and is installed in an explosion-proof control cabinet; The central control unit is the source of logic instructions for the high-speed execution unit. The PLC issues opening and closing commands to the specified valves based on the internal program and the optimized parameters of the intelligent gateway. The high-speed actuator is used to control the switching of gas passages and pulse cleaning actions, and can receive instructions from the central control unit; The high-speed actuator is the consumption unit and control object of the power air source unit. The valve action controls the opening and closing and flow direction of high-pressure gas. The high-speed actuator includes a pneumatic valve assembly, a valve island, and an electromagnetic pilot component. Pneumatic valve assemblies include: The main intake shut-off valve is located on the compressed air intake pipe, which is connected to the air inlet of the membrane module. The nitrogen main shut-off valve is located on the product nitrogen output pipeline, which is connected to the nitrogen outlet of the membrane module. The pulse jet valve, a key actuator of this invention, is a high-speed response solenoid valve. Its inlet is connected to a high-pressure storage tank, and its outlet is connected to the cleaning port of the membrane module through a pipeline. A drain valve is installed at the drain port of the membrane module; Valve island and electromagnetic pilot component: used for centralized driving and control of the pneumatic valve assembly; The power air supply unit provides the compressed air required for cleaning and driving the actuator; The human-machine interface unit is used to display the system process flow, real-time parameters, historical curves and alarm information, and provides parameter setting and manual operation interface. The human-machine interface unit is the upper-level information interaction port of the central control unit, realizing two-way communication between command issuance and status monitoring.

8. A pulse reverse self-cleaning system according to claim 7, characterized in that: The sensing and detection unit includes a differential pressure sensor module, a purity analysis module, a flow monitoring module, a pressure monitoring module, and a valve position feedback module.

9. A pulse reverse self-cleaning system according to claim 7, characterized in that: The central control unit includes a programmable logic controller and an edge computing smart gateway.

10. A pulse reverse self-cleaning system according to claim 7, characterized in that: The power air source unit includes a high-pressure air storage tank and an instrument air source processing component.

Images