Gas nano-purification method and purifier

Abstract

This invention relates to a gas nano-purification method and purifier. The method includes the gas to be cleaned entering a gas-liquid separator for gas-liquid separation and coarse filtration to remove liquid impurities and large particulate solid impurities, obtaining pre-purified gas. Based on switching logic, the pre-purified gas is alternately delivered to two adsorption unit groups for deep adsorption purification. Inside the adsorption unit, adsorbent dehydration and fine dust interception are performed sequentially to obtain clean gas. A portion of the clean gas is delivered to a gas storage chamber for storage, and another portion is delivered to a regeneration gas chamber for pre-storage, for subsequent regeneration cycles in the adsorption units. This invention achieves seamless connection between adsorption and regeneration through an integrated design of continuous adsorption operation, online regeneration cycle, and automatic pressure equalization switching, ensuring uninterrupted gas supply throughout the process. This effectively avoids gas supply interruptions and drastic pressure fluctuations, meeting the stringent requirements for stable gas sources in precision manufacturing, automated production lines, and continuous production scenarios.

Description

Technical Field

[0001] This invention relates to the field of gas purification technology, and in particular to a gas nano-purification method and purifier. Background Technology

[0002] In industrial automation, precision manufacturing, and the operation of pneumatic equipment, the quality of high-pressure air directly affects the accuracy and lifespan of end effectors. Raw compressed air typically contains a large amount of condensate, oil, and solid particulate dust. If these impurities are not effectively removed, they can lead to pipe corrosion, jamming of pneumatic components, seal failure, or product contamination. Therefore, in air source treatment systems, gas purification methods are usually required to remove water, oil, and dust from the air.

[0003] Traditional gas purification methods mostly employ an intermittent operating mode. Once the adsorption unit reaches adsorption saturation, the gas supply must be stopped and the system depressurized before the regeneration process can be restarted. This makes it impossible to achieve seamless switching between adsorption and regeneration modes under uninterrupted gas supply conditions. Such methods directly cause problems such as gas supply interruptions, drastic fluctuations in outlet gas pressure, poor airflow stability, and gas leaks, making it difficult to meet the stringent requirements of continuous and stable gas supply in applications such as precision manufacturing, automated production lines, and pneumatic control equipment.

[0004] Meanwhile, traditional adsorption units generally rely on an external independent gas source to provide backflushing gas for adsorption and regeneration of the adsorbent. This method not only significantly increases the structural complexity of the system, the difficulty of pipeline layout, and the overall operating energy consumption, but also introduces external impurities into the adsorption unit due to the uncontrollable cleanliness of the external gas source, causing secondary pollution, reducing the purification effect, and shortening the service life of core components. Summary of the Invention

[0005] To address the aforementioned shortcomings, this invention proposes a gas nano-purification method and purifier.

[0006] The technical solution adopted in this invention is a gas nano-purification method, comprising the following steps under adsorption conditions: S1, the gas to be cleaned enters a gas-liquid separator for gas-liquid separation and coarse filtration to remove liquid impurities and large particulate solid impurities from the gas, obtaining pre-purified gas; S2, based on switching logic, the pre-purified gas is alternately transported to two adsorption unit groups for deep adsorption purification, wherein the adsorbent dehydration treatment and fine dust interception treatment are sequentially completed inside the adsorption unit to obtain clean gas; S3, a portion of the clean gas is transported to a gas storage chamber for storage, and another portion is transported to a regeneration gas chamber for pre-storage, for subsequent regeneration cycle of the adsorption unit; wherein, under the adsorption conditions, the sewage discharge channel of the adsorption unit in the adsorption state is kept closed, the sewage discharge channel of the adsorption unit in the regeneration state is kept open, and the internal pressure of the adsorption unit in the adsorption state is greater than the internal pressure of the adsorption unit in the regeneration state.

[0007] Preferably, in step S1, the gas to be cleaned enters the gas-liquid separator for gas-liquid separation and coarse filtration. Specifically, the gas to be cleaned first passes through the swirl vanes of the swirl vane assembly to form a swirling flow for centrifugal gas-liquid separation, then passes through the axial gas channel of the guide tube for gravity sedimentation separation, and finally passes through the primary filter element for coarse filtration to obtain preliminarily purified gas.

[0008] Preferably, in step S2, the adsorption unit sequentially performs adsorbent dehydration and fine dust interception treatment, specifically including: S21, the pre-purified gas enters the inner tube inlet section from the tower inlet of the adsorption unit and flows axially from bottom to top to the adsorption section; S22, the pre-purified gas contacts the adsorbent in the adsorption section, and the adsorbent dehydrates the moisture in the gas to obtain dehydrated gas; S23, the dehydrated gas continues to flow axially from bottom to top to the dust removal section, passes radially through the filter layer of the dust removal section, and the filter layer intercepts the fine dust in the gas to complete the fine dust interception treatment and obtain clean gas; S24, the clean gas enters the annular gap between the inner tube and the outer tube and collects, and then exits from the first outlet of the adsorption unit.

[0009] Preferably, the switching logic of S2 specifically includes: when the adsorption unit in adsorption mode meets the preset adsorption switching conditions, triggering an adsorption switching command to deliver preliminary purified gas to another adsorption unit; the preset adsorption switching conditions are: the actual adsorption time of the adsorption unit in adsorption mode reaches the preset adsorption time; or the liquid level of water removed in the adsorption unit in adsorption mode reaches the preset liquid level height; or the pressure value inside the adsorption unit in adsorption mode reaches the preset pressure threshold.

[0010] Preferably, the method further includes a regeneration cycle step, which is triggered in conjunction with the adsorption switching command. Specifically, it includes: S41, after triggering the adsorption switching command, first closing the drain channel of the adsorption unit in the regeneration state, allowing the pre-purified gas to enter both adsorption units simultaneously. The internal pressure of the adsorption unit in the regeneration state slowly rises as the gas enters, until the internal pressures of the two adsorption units are the same, completing the pressure equalization operation; S42, opening the drain channel of the adsorption unit that was originally in the adsorption state, allowing the adsorption unit to enter the regeneration state. The pre-purified gas discharged from the gas-liquid separator is then transported to the adsorption unit that was originally in the regeneration state, and the adsorption unit that was originally in the regeneration state enters the adsorption state; S43, in the adsorption unit that has entered the regeneration state, the clean gas pre-stored in the regeneration gas chamber enters the adsorption unit along the reverse path of the original adsorption purification and is discharged from the drain channel of the adsorption unit, completing the regeneration cycle.

[0011] Preferably, the adsorption condition and regeneration cycle step are automatically switched by a pair of valves. The pair of valves includes a first valve and a second valve. The first valve controls the delivery and distribution of the pre-purified gas to the adsorption unit group, and the second valve controls the delivery of the clean gas to the gas storage chamber. The valve core of the valve moves automatically based on the pressure difference between the adsorption units to complete the gas path switching.

[0012] This invention also provides a gas nano-purifier for implementing the above-mentioned gas nano-purification method. The gas nano-purifier includes a mounting base and a gas storage chamber fixed on the mounting base and extending upward to form a mounting plate. A gas passage hole penetrating the plate is opened in the middle of the mounting plate. A first adsorption tower and a second adsorption tower for performing a second purification of the gas are symmetrically mounted on the mounting plate, and a pair of drain valves are integrated in the gap between the first adsorption tower and the second adsorption tower. A gas-water separator for performing a first purification is also mounted on the mounting plate. One end of one drain valve is connected to the gas-water separator, and the other end is controlled to switch to the air inlet end of the first adsorption tower or the second adsorption tower. One end of the other drain valve is controlled to switch to the air outlet end of the first adsorption tower or the second adsorption tower, and the other end is connected to the gas storage chamber through an exhaust pipe. The exhaust pipe is axially arranged through the gas passage hole.

[0013] Preferably, the gas-water separator includes a separator inlet and a swirl assembly. The swirl assembly consists of nested swirl blades and a guide tube. The swirl blades include an outer ring and an inner ring arranged coaxially, and several blades spaced between them at acute or obtuse angles to the axial direction of the outer ring. The separator inlet is located above the swirl blades. The guide tube is a cylindrical structure that passes through the center of the inner ring, and its interior has several axially extending gas channels. The gas-water separator also includes a primary filter element and a separator outlet. The internal cavity of the primary filter element is sealed and connected to the top outlet of the guide tube. The gas in the cavity passes through the filter element wall and is discharged through the separator outlet.

[0014] Preferably, the adsorption tower includes an outer tube and an inner tube housed therein. The inner tube is divided from bottom to top into an air inlet section, an adsorption section filled with adsorbent, and a dust removal section with a sidewall filter layer. The air inlet section has an air inlet for gas entry, and the axial ends of the adsorption section are limited by a first filter and a second filter, respectively. Under purification conditions, after entering the inner tube, the gas flows axially through the adsorption section and the dust removal section, then radially through the filter layer into the annular gap between the inner and outer tubes, and converges at a first outlet on the wall of the outer tube. A second outlet is provided at the lower end of the air inlet section. The adsorption tower also includes a regeneration gas chamber, which is connected to the outer tube.

[0015] Preferably, the valve includes a valve body with a common interface and a pair of switching interfaces. A pair of valve seats are fixed in the valve body and are symmetrically distributed. The valve cavity formed inside each valve seat controls the common interface and the corresponding switching interface to be connected. A slidable valve core is provided between the two valve cavities. The valve core generates axial displacement under the action of the pressure difference at both ends, so as to alternately close one of the switching interfaces and simultaneously open the other switching interface.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. This invention fundamentally solves the problem that traditional purification equipment must be shut down for depressurization and regeneration through an integrated design of continuous adsorption operation, online regeneration cycle, and automatic pressure equalization switching. It achieves seamless connection between adsorption and regeneration, uninterrupted gas supply throughout the process, effectively avoids gas supply interruption and drastic gas pressure fluctuations, and provides a more stable output airflow. It can meet the stringent requirements of precision manufacturing, automated production lines and continuous production scenarios for a stable gas source.

[0018] 2. This invention adopts a four-stage purification structure of gas-liquid separation, coarse filtration, adsorption dehydration, and fine dust interception. The pre-gas-liquid separator, through the synergistic effect of cyclone centrifugal separation, gravity sedimentation separation, and primary filter, efficiently removes liquid water, oil mist, and large particulate impurities, significantly reduces the load on the downstream adsorption unit, slows down the saturation and pulverization rate of the adsorbent, extends the service life of core components, and improves the overall purification accuracy and operational stability.

[0019] 3. This invention adopts a self-clean gas pre-storage regeneration mode. The regeneration gas comes from a portion of the clean gas under adsorption conditions, eliminating the need for an external independent gas source. This reduces the complexity of the system structure and operating energy consumption, while also avoiding secondary pollution from an external gas source. At the same time, the regeneration gas flows in the reverse direction along the adsorption path, enabling comprehensive backwashing and self-cleaning of the adsorbent, filter screen, and filter layer, thereby improving the sufficiency of regeneration and the long-term operating capability of the equipment.

[0020] 4. This invention achieves automatic switching between adsorption and regeneration through a pressure equalization step and pressure difference-driven valve. Combined with multi-dimensional switching trigger conditions of time, liquid level, and pressure, the control logic is more precise and the operation is more reliable. The pressure equalization process can eliminate the airflow impact and pipeline vibration caused by sudden pressure changes in the tower body, reduce equipment noise, and extend the service life of valves and pipelines.

[0021] 5. This invention adopts a highly integrated integrated structure layout, with the gas-water separator, dual adsorption tower and vent valve integrated on the same mounting plate. The gas path is shorter, the flow resistance is smaller, the leakage risk is lower, the overall space utilization is high, and the installation and maintenance are simple. The design of the exhaust pipe passing through the gas path through hole of the mounting plate further optimizes the gas path direction, improves the overall integrity and appearance of the equipment, and is suitable for miniaturized and compact installation scenarios. Attached Figure Description

[0022] The present invention will now be described in detail with reference to the embodiments and accompanying drawings, wherein:

[0023] Figure 1 This is a flowchart of a gas nano-purification method;

[0024] Figure 2 This is a schematic diagram of the overall structure of the gas nano-purifier;

[0025] Figure 3 yes Figure 2 A diagram from another perspective;

[0026] Figure 4 This is a three-dimensional cross-sectional view of a gas-liquid separator;

[0027] Figure 5 This is a three-dimensional cross-sectional view of the gas-liquid separator from another perspective;

[0028] Figure 6 This is a schematic diagram of the overall structure of the adsorption tower;

[0029] Figure 7 This is a three-dimensional cross-sectional view of the adsorption tower;

[0030] Figure 8 This is a cross-sectional view of the adsorption tower;

[0031] Figure 9 This is a three-dimensional cross-sectional view of the adsorption tower from another direction;

[0032] Figure 10 This is a three-dimensional cross-sectional view of part of the inner tube;

[0033] Figure 11 This is a schematic diagram of the overall structure of two vent valves arranged vertically.

[0034] Figure 12 It is a three-dimensional cross-sectional view of two drain valves arranged vertically.

[0035] Figure 13 This is a schematic diagram of the overall structure of a pair of valve seats and valve cores;

[0036] Figure 14 It is a cross-sectional view of a pair of valve seats and valve cores;

[0037] Figure 15 It is a three-dimensional cross-sectional view of the valve seat and part of the valve core;

[0038] Figure 16 This is an exploded view of the valve seat;

[0039] Figure 17 This is a partially exploded cross-sectional view of the valve core.

[0040] 100. Adsorption tower; 110. Outer pipe; 111. First air outlet; 112. Vent hole; 113. Regeneration gas chamber; 120. Inner pipe; 121. Air inlet section; 122. Adsorption section; 123. Dust removal section; 124. Tower body air inlet; 125. First filter screen; 126. Second filter screen; 127. Filter layer; 128. Elastic compensation mechanism; 128a. Elastic pre-tightening component; 128b. Pressing component; 128c. Stop block; 129. Second air outlet; 130. Solenoid valve;

[0041] 300. Valve; 310. Valve body; 311. Common interface; 312. Switching interface; 320. Valve seat; 321. Locking element; 321a. First through hole; 321b. Annular abutment surface; 321c. Annular sealing seat; 322. Limiting sleeve; 323. Baffle seat; 323a. Second through hole; 323b. Third through hole; 324. Elastic sealing ring; 330. Valve core; 331. Connecting rod; 332. Baffle assembly; 333. First baffle; 333a. Annular boss; 334. Second baffle; 335. Nut; 335a. Annular groove;

[0042] 400. Air-water separator; 410. Separator air inlet; 420. Rotary blade assembly; 421. Rotary blade; 422. Flow guide tube; 430. Primary filter element; 440. Separator air outlet;

[0043] 500. Gas storage compartment; 510. Mounting plate; 520. Exhaust pipe;

[0044] 600. Mounting bracket. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0046] In one embodiment, a gas nano-purification method is described in [reference needed]. Figure 1 This includes steps S1 to S3 of the adsorption process.

[0047] In step S1, the gas to be cleaned enters the gas-liquid separator. The gas-liquid separator can be a sealed shell made of aluminum alloy or stainless steel, and its interior contains a rotary vane assembly and a primary filter element. After entering through the separator's inlet, the gas undergoes centrifugal separation by the rotary vane assembly and filtration by the primary filter element, removing entrained liquid water, oil mist, and large particulate solid impurities, resulting in preliminarily purified gas. A drain port is located at the bottom of the gas-liquid separator for periodically discharging the separated liquid and impurities.

[0048] In step S2, based on a preset switching logic, the pre-purified gas obtained in step S1 is alternately delivered to two adsorption units. Each adsorption unit integrates an adsorbent layer and a terminal filter layer. Within the adsorption unit, the gas first passes through the adsorbent layer for dehydration, then passes through the terminal filter layer to intercept the fine dust generated by the adsorbent pulverization, ultimately yielding clean gas. The shell of the adsorption unit can be made of carbon steel or stainless steel, the adsorbent is activated alumina or molecular sieve particles, and the terminal filter layer is high-pressure resistant fiber filter paper or sintered metal mesh.

[0049] In step S3, a portion of the clean gas obtained in step S2 is transported to a gas storage chamber for storage, and the other portion is transported to a regeneration gas chamber for pre-storage. The gas storage chamber is a pressure vessel, which can be made of carbon steel or stainless steel, and its volume is determined according to the system's gas consumption. The regeneration gas chamber is used to store the clean gas required for regeneration in subsequent adsorption units.

[0050] During adsorption operation, the bottom drain channel of the adsorption unit in adsorption mode remains closed, allowing all gas to flow upwards through the adsorbent and filter layers. In regeneration mode, the bottom drain channel of the adsorption unit remains open to allow regeneration waste gas to be discharged. Because the gas flow resistance is higher inside the adsorption unit in adsorption mode, while a low-pressure zone is created by the open drain port in regeneration mode, the internal pressure of the adsorption unit in adsorption mode is higher than that in regeneration mode. This pressure difference drives the reversing element in the gas path to automatically switch, requiring no external control.

[0051] This embodiment achieves continuous gas purification and regeneration preparation through three steps, S1 to S3. The two-stage separation and filtration of the gas-liquid separator effectively reduces the load on the adsorption unit and extends the service life of the adsorbent. The alternating design of the dual adsorption units, combined with the opening and closing of the drain channel, allows adsorption and regeneration to occur simultaneously, avoiding gas supply interruptions. Partial pre-storage of clean gas provides a self-sufficient gas source for subsequent regeneration, eliminating the need for an external independent gas source, simplifying the system structure and avoiding secondary pollution. The adsorption unit integrates dehydration and dust removal functions, reducing external piping connections and making the entire unit more compact.

[0052] In one embodiment, the gas to be cleaned in S1 enters the gas-liquid separator for gas-liquid separation and coarse filtration. Specifically, the gas to be cleaned first passes through the swirl vanes of the swirl vane assembly to form a swirling flow for centrifugal gas-liquid separation, then passes through the axial gas channel of the guide tube for gravity sedimentation separation, and finally passes through the primary filter element for coarse filtration to obtain preliminarily purified gas.

[0053] The gas to be cleaned first enters the vortex assembly, which consists of vortex blades and a guide tube. The vortex blades include an outer ring and an inner ring arranged coaxially, and several blades spaced between them at acute or obtuse angles to the axial direction of the outer ring. Multiple blades are evenly arranged circumferentially along the inner ring, and each blade is inclined relative to the airflow direction. As the gas flows past the blades, it is forced to change its flow direction, forming a high-speed rotating vortex field. Under centrifugal force, denser liquid droplets such as water and oil in the gas are thrown towards the inner wall of the gas-liquid separator, collect along the wall, and flow downwards to the bottom drain, achieving centrifugal gas-liquid separation.

[0054] The gas, after undergoing swirling separation, then enters the guide tube. The guide tube is a vertically arranged cylindrical structure with multiple axially extending gas channels inside. The cross-section of these channels can be circular, rectangular, or fan-shaped. Inside the guide tube, the gas transitions from a swirling state to axial linear flow, and the flow velocity tends to be uniform. During the upward axial flow, residual fine droplets in the gas naturally settle under gravity, creating relative motion with the rising airflow. The droplets then fall to the bottom of the guide tube under gravity, completing a secondary gravity settling separation.

[0055] The gas discharged from the guide tube finally enters the primary filter element. The primary filter element is a cylindrical porous filter element, which can be made of pleated filter paper, rolled filter paper, sintered metal mesh, or polyester fiber winding, and its wall surface has a uniformly distributed microporous structure. The gas passes radially outward from the internal cavity of the primary filter element through the filter element wall surface. The micropores of the filter element intercept the tiny liquid droplets and solid particles remaining in the gas, achieving coarse filtration. The intercepted impurities adhere to the inner wall of the filter element or deposit at the bottom of the filter element. The preliminarily purified gas is collected from the outside of the filter element and discharged.

[0056] This treatment method sequentially connects centrifugal separation, gravity sedimentation, and mechanical interception to create a gradient separation effect. The efficient swirling separation of the blades removes most liquid impurities, significantly reducing the load on subsequent filtration units. Gravity sedimentation in the guide tube utilizes the gas-liquid density difference to further separate fine droplets, and the axial channel design avoids interference from airflow turbulence during the sedimentation process. The primary filter element acts as the final barrier, intercepting residual impurities to ensure that the gas entering the adsorption unit reaches a high level of cleanliness. The synergistic effect of these multiple separation mechanisms enables the gas-liquid separator to achieve high separation efficiency within a compact structure, effectively protecting the downstream adsorption unit and slowing down the saturation and pulverization rate of the adsorbent.

[0057] In one embodiment, the adsorption unit in step S2 sequentially performs adsorbent dehydration and fine dust interception treatment, specifically including: S21, the pre-purified gas enters the inner tube inlet section from the tower inlet of the adsorption unit and flows axially from bottom to top to the adsorption section; S22, the pre-purified gas contacts the adsorbent in the adsorption section, and the adsorbent dehydrates the moisture in the gas to obtain dehydrated gas; S23, the dehydrated gas continues to flow axially from bottom to top to the dust removal section, passes radially through the filter layer of the dust removal section, and the filter layer intercepts the fine dust in the gas to complete the fine dust interception treatment and obtain clean gas; S24, the clean gas enters the annular gap between the inner tube and the outer tube and collects, and then exits from the first outlet of the adsorption unit.

[0058] After the pre-purified gas enters the inlet section of the inner tube through the gas inlet of the tower body, it flows axially from bottom to top. This axial flow direction, with the gas flowing from bottom to top, is opposite to the direction of gravity. As the gas rises, any trace droplets or large particles of impurities that may be carried in the airflow naturally settle due to gravity and will not enter the adsorption section with the airflow, thus avoiding contamination of the adsorbent bed. At the same time, the axial flow ensures that the gas is evenly distributed within the adsorption section, making full use of the entire cross-section of the adsorbent bed and improving the utilization rate of the adsorbent. During the gas flow through the adsorption section, moisture is captured by the microporous structure on the surface of the adsorbent, achieving dehydration treatment.

[0059] The dehydrated gas continues upward into the dust removal section. Unlike axial flow, the gas flow direction in the dust removal section changes to radial, passing from the inside out through the filter layer located on the side wall of the dust removal section. The filter layer is continuously arranged circumferentially along the inner tube, and its effective filtration area is the area of ​​a cylindrical surface, much larger than the axial end face filtration area of ​​the same radial dimension. This radial flow method significantly reduces the filtration velocity and reduces air resistance at the same gas flow rate, while creating a uniform pressure distribution on the filter layer surface, avoiding localized perforation failure caused by concentrated airflow impacting the central area of ​​the filter layer during axial filtration. The filter layer intercepts fine dust generated by adsorbent pulverization, preventing it from entering the downstream pipeline.

[0060] After passing through the filter layer, the clean gas enters the annular gap between the inner and outer tubes. The flow cross-sectional area of ​​this annular gap is much larger than the total open area of ​​the filter layer. Here, the gas expands in volume, its velocity decreases significantly, and the dynamic pressure is converted into static pressure, forming a low-pressure, stable gas zone. Gases from different circumferential positions mix thoroughly and reach pressure equilibrium within this zone before being discharged through the first outlet. This process effectively eliminates pressure fluctuations caused by local resistance differences in the filter layer or airflow pulsations, resulting in a more stable output gas pressure.

[0061] By integrating the adsorption and dust removal sections into the same inner tube and employing a gas path design combining axial and radial flow, this embodiment achieves both deep dehydration and fine dust removal within a compact space. Axial flow ensures sufficient contact time between the gas and the adsorbent, while radial flow provides a large filtration area and low air resistance for effective dust removal. The buffering effect of the annular gap further stabilizes the output gas pressure. The overall structure eliminates the need for external piping connections, reduces leakage points, and improves the system's integration and reliability.

[0062] In one embodiment, the switching logic of S2 specifically includes: when the adsorption unit in adsorption mode meets the preset adsorption switching conditions, triggering an adsorption switching command to deliver preliminary purified gas to another adsorption unit; the preset adsorption switching conditions are: the actual adsorption time of the adsorption unit in adsorption mode reaches the preset adsorption time; or the liquid level of water removed from the adsorption unit in adsorption mode reaches the preset liquid level height; or the pressure value inside the adsorption unit in adsorption mode reaches the preset pressure threshold.

[0063] Step S2 employs an automatically triggered switching logic to complete the switching of the adsorption unit's working state. The system continuously monitors the operating parameters of the adsorption unit in adsorption mode. When the operating parameters reach the preset standard, it automatically generates and executes an adsorption switching command, switching the delivery path of the initially purified gas to another adsorption unit to ensure the continuous and stable operation of the gas purification process.

[0064] The adsorption switching command is triggered based on multiple independently usable preset adsorption switching conditions, providing multi-dimensional judgment criteria for system operation. The first condition is time-controlled mode: when the actual continuous adsorption time of the adsorption unit in adsorption mode reaches the system's preset adsorption time, the adsorption switching command is immediately triggered, achieving timed and orderly switching. The second condition is liquid level control mode: when the height of the separated liquid water inside the adsorption unit reaches the system's preset liquid level, the adsorption unit is determined to be near saturation, and the adsorption switching command is triggered. The third condition is pressure control mode: when the gas pressure inside the adsorption unit rises to the system's preset pressure threshold, it indicates increased resistance and decreased adsorption capacity, at which point the adsorption switching command is triggered, completing the change in operating state.

[0065] The system's ability to select switching criteria based on actual operating conditions, gas humidity, and impurity content enhances the accuracy and timeliness of state transitions. Time, liquid level, and pressure triggering methods complement each other, avoiding the problems of delayed or premature switching caused by a single judgment criterion. This effectively ensures that the adsorption unit remains within its high-efficiency operating range, improving overall purification efficiency and operational stability. The multi-condition adaptive switching logic extends the lifespan of adsorption components, reduces energy consumption and maintenance costs, and allows the system to adapt to more complex operating conditions and application scenarios.

[0066] In one embodiment, the method further includes a regeneration cycle step, which is triggered in conjunction with an adsorption switching command. Specifically, the regeneration cycle step includes: S41, after triggering the adsorption switching command, first closing the drain channel of the adsorption unit in the regeneration state, allowing the pre-purified gas to enter both adsorption units simultaneously. The internal pressure of the adsorption unit in the regeneration state slowly rises as the gas enters, until the internal pressures of the two adsorption units are the same, completing the pressure equalization operation; S42, opening the drain channel of the adsorption unit originally in the adsorption state, allowing the adsorption unit to enter the regeneration state, and the pre-purified gas discharged from the gas-liquid separator is transferred to the adsorption unit originally in the regeneration state, allowing the adsorption unit originally in the regeneration state to enter the adsorption state; S43, in the adsorption unit entering the regeneration state, the clean gas pre-stored in the regeneration gas chamber enters the adsorption unit along the reverse path of the original adsorption purification and is discharged from the drain channel of the adsorption unit, completing the regeneration cycle.

[0067] The regeneration cycle step and the adsorption switching command are linked and triggered. When the adsorption switching command takes effect, the regeneration cycle process is started synchronously to achieve synchronous conversion between adsorption and regeneration states.

[0068] The regeneration cycle first performs a pressure equalization operation. After the adsorption switching command is triggered, the drain channel of the adsorption unit in regeneration mode is closed, and the pre-purified gas output from the gas-liquid separator simultaneously enters the two adsorption units. As the gas continues to flow in, the internal pressure of the adsorption unit that was originally in regeneration mode gradually and steadily rises until the internal pressure values ​​of the two adsorption units are consistent, completing the dual-tower pressure equalization process.

[0069] After pressure equalization is completed, the operating condition switching phase begins. The drain channel of the adsorption unit that was originally in adsorption mode is opened, allowing the adsorption unit to switch to regeneration mode. The pre-purified gas output from the gas-liquid separator is redirected and delivered entirely to the adsorption unit that was originally in regeneration mode, allowing the adsorption unit to officially enter adsorption mode, thus completing the exchange of operating states between the two towers.

[0070] When the adsorption unit enters regeneration mode, the regeneration process begins. Clean gas pre-stored inside the regeneration gas chamber flows into the adsorption unit along the reverse path of the adsorption purification process, performing reverse rinsing and regeneration on the adsorption components. The regeneration gas carrying desorbed impurities and moisture is finally discharged through the adsorption unit's exhaust channel, completing a full regeneration cycle.

[0071] The regeneration cycle steps are executed in conjunction with the adsorption switching command, enabling seamless integration of dual-tower adsorption and regeneration, preventing gas supply interruptions during the purification process. Pressure equalization eliminates pressure surges between the two towers, reducing airflow impact and equipment vibration, and improving system operational stability. Employing a pre-stored clean gas reverse regeneration method eliminates the need for an external gas source, simplifying the system structure, reducing energy consumption, and avoiding secondary pollution from external gas sources, ensuring a stable and reliable regeneration process. The reverse-flowing regeneration gas effectively restores the adsorption capacity of the adsorption components, extends the service life of core components, and improves the overall operating efficiency and continuous purification capability of the equipment.

[0072] In one embodiment, the adsorption condition and regeneration cycle step are automatically switched by a pair of vent valves. The pair of vent valves includes a first vent valve and a second vent valve. The first vent valve controls the delivery and distribution of the pre-purified gas to the adsorption unit group, and the second vent valve controls the delivery of the clean gas to the gas storage chamber. The vent valves automatically move their valve cores based on the pressure difference between the adsorption units to complete the gas path switching.

[0073] The adsorption mode and regeneration cycle steps are automatically switched by a pair of relief valves. The entire switching process requires no external electrical control and can achieve stable operation solely based on changes in gas pressure. The pair of relief valves consists of a first relief valve and a second relief valve, which are assigned specific functions according to the gas delivery path and work together to complete the state transition of the purification process.

[0074] The first vent valve is responsible for distributing the pre-purified gas, controlling the delivery path of the pre-purified gas output from the gas-liquid separator to the two adsorption units. It selectively guides the gas into the corresponding adsorption unit based on operating conditions, ensuring an orderly switching between adsorption and regeneration states. The second vent valve is responsible for collecting and outputting the clean gas, controlling the delivery of the purified gas to the storage tank, and stably guiding the clean gas output from the adsorption unit in adsorption mode into the storage tank for storage.

[0075] Both valves are equipped with movable valve cores. The valve cores are axially displaced by the pressure difference between the two adsorption units. The pressure difference directly drives the valve cores to move, requiring no additional power input. The valve cores switch positions under the action of the pressure difference, simultaneously opening and closing the corresponding gas path, quickly completing the gas path conversion between adsorption and regeneration modes.

[0076] The use of pressure differential-driven valves for automatic gas path switching simplifies the system control structure, reduces the number of electrical components, and improves the operational reliability of the equipment under complex conditions. The valves have clearly defined functions and synchronized actions, enabling rapid response to pressure changes between the two towers, achieving seamless switching between adsorption and regeneration, and ensuring a continuous and stable gas output. The purely mechanical automatic switching structure reduces equipment failure rates and maintenance costs, improving the overall system's operational stability and service life.

[0077] In one embodiment, a gas nano-purifier is used in the gas nano-purification method described in the above embodiment. The gas nano-purifier includes a mounting base and a gas storage chamber fixed to the mounting base and having its shell extending upward to form a mounting plate. A gas passage hole penetrating the plate is provided in the middle of the mounting plate. A first adsorption tower and a second adsorption tower for performing a second purification of the gas are symmetrically mounted on the mounting plate, and a pair of drain valves are integrated in the gap between the first adsorption tower and the second adsorption tower. A gas-water separator for performing a first purification is also mounted on the mounting plate. One end of one drain valve is connected to the gas-water separator, and the other end is controlled to switch to the gas inlet end of the first adsorption tower or the second adsorption tower. One end of the other drain valve is controlled to switch to the gas outlet end of the first adsorption tower or the second adsorption tower, and the other end is connected to the gas storage chamber through an exhaust pipe. The exhaust pipe is axially arranged through the gas passage hole.

[0078] In a more specific embodiment, see Figure 2-3 The gas nano-purifier includes a mounting base 600, a gas storage chamber 500, a gas-water separator 400, and an adsorption tower 100.

[0079] Mounting base 600 is made of welded or cast metal sheet, such as carbon steel or stainless steel. Mounting base 600 has a flat or frame structure and serves to support other components of the equipment and provide a stable foundation. Vibration-damping feet can be installed under mounting base 600 to reduce vibrations transmitted to the ground during equipment operation.

[0080] The gas storage chamber 500 is fixedly installed on the mounting base 600 and is used to store purified gas. The gas storage chamber 500 is a sealed pressure vessel, which can be made of carbon steel or stainless steel, and its shape can be cylindrical, spherical, or rectangular to adapt to different installation spaces and volume requirements. The upper side wall of the gas storage chamber 500 extends upward to form a mounting plate 510, which is integrally formed with the shell of the gas storage chamber 500 or fixedly connected by welding. A gas passage hole is opened in the middle of the mounting plate 510, which extends horizontally through the mounting plate 510 for the subsequent exhaust pipe 520 and various electrical wires to pass through.

[0081] The gas-liquid separator 400 is installed on one side of the mounting plate 510 and is used for the initial purification of the gas to be cleaned. The gas-liquid separator 400 can be a centrifugal or filter type, and its shell is usually made of aluminum alloy, stainless steel or carbon steel, with swirl vanes or filter elements inside. The bottom of the gas-liquid separator 400 has a drain port for discharging the separated liquid water and oil.

[0082] The adsorption tower 100 is also installed on one side of the mounting plate 510 for further purification of the gas after the first purification. The adsorption tower 100 can be a vertical cylindrical structure, filled with an adsorbent such as activated alumina or molecular sieve. Preferably, the adsorption tower 100 and the gas-liquid separator 400 are installed on the same side of the mounting plate 510.

[0083] The gas to be cleaned flows sequentially through the gas-liquid separator 400 and the adsorption tower 100 before entering the gas storage chamber 500. Specifically, the gas to be cleaned first enters the gas-liquid separator 400 from an external gas source. After gas-liquid separation and preliminary filtration by the primary filter element in the gas-liquid separator 400, the gas enters the adsorption tower 100 through a connecting pipeline. Inside the adsorption tower 100, the gas comes into full contact with the adsorbent, and moisture and residual impurities are adsorbed and removed, forming clean gas. After being discharged from the outlet of the adsorption tower 100, the clean gas enters the gas storage chamber 500 through an exhaust pipe 520.

[0084] The adsorption tower 100 and the gas storage chamber 500 are connected by an exhaust pipe 520. The exhaust pipe 520 can be made of metal, with one end connected to the outlet of the adsorption tower 100 and the other end connected to the inlet of the gas storage chamber 500. The exhaust pipe 520 passes through a gas passage hole in the middle of the mounting plate 510. Since the gas passage hole runs horizontally through the mounting plate 510, and both the gas-liquid separator 400 and the adsorption tower 100 are mounted on the same side of the mounting plate 510, the exhaust pipe 520, after exiting the outlet of the adsorption tower 100, passes directly through the gas passage hole into the gas storage chamber 500 in a short straight line, without any unnecessary bends or detours. A gap can be maintained between the inner wall of the gas passage hole and the outer wall of the exhaust pipe 520 to facilitate installation and disassembly. Alternatively, a rubber sleeve or sealing ring can be installed inside the gas passage hole to prevent direct contact and wear between the exhaust pipe 520 and the mounting plate 510.

[0085] In one embodiment, see Figure 4-5 The gas-liquid separator 400 includes a lower chamber and an upper chamber. Both chambers can be made of corrosion-resistant metal materials such as aluminum alloy or stainless steel, which also possess certain pressure-bearing properties. They are formed through stamping, casting, or welding processes and are assembled as a single unit using a sealed connection structure to ensure the airtightness of the gas-liquid separator 400 and meet the requirements for high-pressure gas purification. A separator inlet 410 is provided on the outer wall of the lower chamber. The high-pressure gas to be cleaned enters the lower chamber through the separator inlet 410, undergoes gas-liquid separation in the lower chamber, and then enters the upper chamber for filtration. After filtration in the upper chamber, the gas is discharged through the separator outlet 440 on the outer wall of the upper chamber to the adsorption tower for subsequent drying and other steps, achieving directional flow and staged filtration of the gas within the gas-liquid separator 400.

[0086] Specifically, a vane assembly 420 is installed in the lower cavity, and the separator inlet 410 is connected to the vane assembly 420. The separator inlet 410 can be in the form of a pipe connector, with threads machined on its inner wall for connection to an external air intake pipe. The material of the separator inlet 410 is the same as that of the housing, typically aluminum alloy or stainless steel.

[0087] The swirl assembly 420 includes nested swirl blades 421 and a guide tube 422. Each swirl blade 421 consists of a coaxially arranged outer ring, an inner ring, and several blades. Both the outer and inner rings are annular structures, which can be made from sheet metal through stamping, injection molding, or precision casting, using materials such as plastic, stainless steel, or aluminum alloy. Several blades are spaced apart between the outer and inner rings, with each blade's ends fixedly connected to the inner wall of the outer ring and the outer wall of the inner ring, respectively. The blades can be thin-plate structures, with their planes forming an acute or obtuse angle with the axial direction of the outer ring, i.e., the blades are inclined relative to the axial direction. The specific angle of the blades can be optimized according to the requirements of gas flow rate and separation efficiency, typically between 10 and 85 degrees. The blades are made of the same material as the outer and inner rings, and the three can be integrally cast or fixed by welding or riveting.

[0088] The guide tube 422 is a cylindrical structure, inserted through the center of the inner ring of the rotor 421. The axis of the guide tube 422 coincides with the axis of the rotor 421. Inside the guide tube 422, several gas channels extending axially are provided. These gas channels are formed by guide ribs distributed radially along the tube. The guide ribs can be integrally molded from the same material as the tube to ensure structural integrity and impact resistance. The gas channels extend axially through the upper and lower ends of the tube, forming a continuous flow channel for directional upward gas flow.

[0089] The separator inlet 410 is located above the swirl vane 421. After the clean gas enters the gas-water separator 400 through the separator inlet 410, it passes through the swirl vane 421 from top to bottom through the gaps between multiple vanes. Under the guidance of the vanes, a high-speed swirling flow is formed. After the initial centrifugal separation is completed, the gas enters the interior of the cylinder from the lower end of the guide tube 422, flows upward along the axially extended gas channel, and finally exits from the upper end of the guide tube 422 into the upper filter structure.

[0090] The gas-liquid separator 400 also includes a primary filter element 430, which is located in the upper cavity and can be a cylindrical structure. The internal cavity of the primary filter element 430 is sealed to the top outlet of the guide tube 422. A sealing gasket or sealing ring can be installed between them to prevent gas leakage from the connection gap and ensure that all gas discharged through the guide tube 422 enters the internal cavity of the primary filter element 430. The wall of the primary filter element 430 is made of filter material, such as pleated filter paper, rolled filter paper, sintered metal mesh, or polyester fiber. Under pressure, the gas in the internal cavity passes through the wall of the primary filter element 430. Residual liquid droplets and solid particles in the gas are intercepted inside the filter element. Clean gas is collected from the outside of the filter element and discharged through the separator outlet 440 to the subsequent adsorption tower. The filtered impurities fall down under gravity, and the impurities are periodically emptied by controlling the opening and closing of the drain valve below.

[0091] After the gas undergoes cyclone separation via the guide tube 422, it enters the internal cavity of the primary filter element 430. Under pressure, it radially penetrates the filter element wall, where the filter media traps and filters residual fine droplets and solid impurities, completing secondary filtration and purification. The filtered clean gas collects in the upper cavity and finally exits the gas-water separator 400 through the separator outlet 440 on the outer wall of the upper cavity. The separator outlet 440 can use the same pipe joint structure as the separator inlet 410, or it can be set as a flange interface according to pipeline connection requirements. Its material is the same as that of the upper cavity shell to ensure the sealing and stability of the high-pressure gas discharge.

[0092] During operation, the gas to be cleaned enters the gas-liquid separator 400 through the separator inlet 410 and first flows into the vortex assembly 420. The gas first enters the blade area of ​​the vortex 421, where the inclined blades force the gas to swirl, using centrifugal force to throw large liquid droplets and solid particles entrained in the gas towards the shell wall, achieving preliminary gas-liquid separation. Subsequently, the gas flows into the guide tube 422 and flows upward through the axial gas channel inside the guide tube 422. During the upward axial flow, fine droplets fall under the action of gravity, achieving further separation of fine droplets. The primary filter element 430 further traps the fine impurities remaining after separation by the vortex assembly 420, and the two work together to ensure the purification effect.

[0093] This embodiment forms a series structure of two-stage separation and one-stage fine filtration by placing the swirl vane assembly 420 in the lower cavity and the primary filter element 430 in the upper cavity. The inclined blades of the swirl vane 421 generate swirling centrifugal separation to remove large particles; the axial gas channel of the guide tube 422, in conjunction with the guide ribs, organizes the swirling gas into multiple stable axial airflows, further utilizing gravity settling and inertial collision to separate fine droplets. The primary filter element 430 provides fine filtration to ensure the cleanliness of the output gas. The guide ribs not only separate multiple independent channels but also enhance the structural strength of the guide tube 422, preventing deformation under high-pressure airflow impact. The overall structure is compact, the airflow path is clear, and the separation efficiency is high, making it suitable for industrial applications with high gas cleanliness requirements.

[0094] In one embodiment, adsorption tower 100, see [reference] Figure 6-10The system consists of an outer tube 110 and an inner tube 120 arranged coaxially within the outer tube 110. This nested layout creates an annular flow space between the outer tube 110 and the inner tube 120. The outer tube 110 has a first air outlet 111 for discharging clean gas. The inner tube 120, serving as the core purification channel, is divided into three interconnected functional areas from bottom to top: an air inlet section 121 at the bottom, an adsorption section 122 in the middle, and a dust removal section 123 at the top. By employing a tube-within-a-tube structure with the outer tube 110 and inner tube 120 coaxially arranged, the system's integration is significantly improved, and its size is reduced.

[0095] The inlet section 121 has an inlet 124 for introducing the high-pressure gas to be treated. The internal chamber of the adsorption section 122 is filled with adsorbent to remove moisture or other impurities from the gas. To securely confine the adsorbent within a specific area, a first filter screen 125 is horizontally installed at the bottom of the adsorption section 122 where it connects to the inlet section 121, while a second filter screen 126 is horizontally installed at the top of the adsorption section 122 where it connects to the dust removal section 123. At least a portion of the sidewall of the dust removal section 123 is designed as a filter layer 127 with a microporous structure; preferably, the entire sidewall of the dust removal section 123 is a filter layer 127 with a microporous structure.

[0096] In terms of specific structural implementation, the outer tube 110 can be a high-strength aluminum alloy extruded cylinder or a pressure tank made of cast steel. The inner tube 120 can be a combined support tube formed by multiple metal pipes connected by threads or fixed by clamps. The adsorbent can be activated alumina balls, molecular sieve particles, or silica gel desiccant, etc. The first filter screen 125 and the second filter screen 126 can be stainless steel woven wire mesh, sintered metal mesh, or perforated metal plates, etc. The filter layer 127 on the side wall of the dust removal section 123 can be high-pressure resistant fiber filter paper, folded metal felt, or porous ceramic filter membrane, etc., wrapped around the tube frame.

[0097] During purification operation, the high-pressure gas to be treated first enters the inlet section 121 of the inner tube 120 through the tower inlet 124. Driven by the pressure difference, the gas overcomes gravity and flows vertically upward, passing through the first filter 125 and entering the adsorption section 122. In the adsorption section 122, the gas comes into full contact with the adsorbent particles and undergoes deep drying. Subsequently, the preliminarily purified gas continues upward through the second filter 126 and enters the dust removal section 123. At this point, the gas is constrained by the top closed structure and changes its flow direction, turning into a radial flow from the inside to the outside through the filter layer 127 on the side wall.

[0098] It should be noted that in traditional adsorption towers 100, adsorbent particles are easily pulverized into fine dust particles under the impact and friction of long-term high-pressure airflow. These adsorbent dust particles can enter downstream pipelines with the airflow, causing secondary pollution and damaging downstream precision components. In this embodiment, the gas must pass through the filter layer 127 after leaving the adsorption section 122 before entering the annular gap. This structural design traps the adsorbent dust inside the inner tube 120, avoiding secondary pollution. By placing the filter layer 127 on the side wall of the dust removal section 123, the gas must pass through the filter layer 127 radially, which has two significant advantages compared to traditional axial end-face filtration. First, the filter layer 127 is continuously arranged circumferentially along the inner tube 120, and its effective filtration area is the area of ​​a cylindrical surface, which is much larger than the cross-sectional area of ​​the axial end face filtration under the same radial dimension. This significantly reduces the filtration rate and reduces air resistance under the same gas flow rate. Second, the radial flow path makes the gas form a uniform distribution pressure on the surface of the filter layer 127, avoiding local perforation failure caused by concentrated airflow impacting the central area of ​​the filter layer during axial filtration.

[0099] The filtered clean gas enters the annular gap between the inner tube 120 and the outer tube 110. This annular gap serves as a confluence and pressure stabilization point, where the gases converge and are ultimately discharged continuously from the first outlet 111 of the outer tube 110. Because the flow cross-sectional area of ​​the annular gap is much larger than the total opening area of ​​the filter layer 127 on the side wall of the dust removal section 123, the gas undergoes volume expansion here, the flow velocity decreases significantly, and the dynamic pressure is converted into static pressure, forming a low-pressure, stable air cushion zone. When multiple streams of gas enter the annular gap from different circumferential positions through the filter layer 127, they are fully mixed and pressure equalized within this air cushion zone before being discharged through the first outlet 111. This process effectively eliminates pressure fluctuations caused by local resistance differences or airflow pulsations in the filter layer 127, making the output gas pressure more stable.

[0100] The longitudinal arrangement of the inlet section 121, adsorption section 122, and dust removal section 123 in the inner tube 120 conforms to the characteristics of airflow dynamics. Specifically, the gas flows vertically from bottom to top, in the opposite direction to gravity, which is conducive to the natural sedimentation of large particles and maintains the structural stability of the adsorbent layer under gravity. The height of the adsorption section 122 can be independently designed according to the gas volume and purification requirements. Under a given gas flow rate, the contact time between the gas and the adsorbent can be controlled by adjusting the bed height, ensuring that the gas obtains sufficient residence time in the adsorbent layer to complete deep drying.

[0101] This application also provides an adsorption tower 100, including an elastic compensation mechanism 128, which can automatically eliminate filling gaps in real time, thereby greatly solving the tunneling effect caused by adsorbent shrinkage and the resulting airflow short-circuiting phenomenon. The elastic compensation mechanism 128 is mainly composed of a clamping member 128b and an elastic pre-tightening member 128a. The clamping member 128b serves as a force-bearing or positioning reference and is securely placed within the dust removal section 123. Meanwhile, the second filter screen 126, originally located at the upper end of the adsorption section 122 to constrain the adsorbent, is designed as a movable structure, allowing it to slide freely up and down along the central axis of the inner tube 120, thereby adjusting its position in real time according to the filling height of the adsorbent.

[0102] In terms of specific structural implementation, the clamping component 128b can be a retaining spring or a ring-shaped steel plate with a certain thickness. The clamping component 128b can be fixed to the inner wall of the dust removal section 123 by means of plugging or other methods. The material of the clamping component 128b is usually stainless steel, aluminum alloy, or carbon steel with rust-proof surface treatment, which have good mechanical strength and chemical stability. The second filter screen 126 can be specifically composed of a high-hardness stainless steel support frame and multiple layers of fine wire mesh. Its outer diameter maintains a slight gap fit with the inner wall of the adsorption section 122 of the inner tube 120 to ensure smooth sliding.

[0103] The elastic preload 128a is longitudinally clamped between the clamping member 128b and the second filter screen 126. In the assembled state, the elastic preload 128a is in a pre-compressed deformation process, with its two ends tightly abutting against the bottom surface of the clamping member 128b and the top surface of the second filter screen 126, respectively. The elastic preload 128a can be specifically embodied as a cylindrical helical spring, a multi-layered stacked disc spring, or a high-elasticity, high-temperature resistant synthetic rubber column. These components can be made of high-performance spring steel, such as manganese steel or silicon-manganese alloy steel, to ensure that stable elastic force output is maintained without permanent deformation under long-term high-temperature and high-pressure environments.

[0104] This embodiment introduces a continuous axial compressive force above the adsorption section 122, making the second filter screen 126 a dynamic pressure cap that can move in real time according to the change in the internal packing volume of the adsorption section 122. When the adsorbent wears and breaks due to long-term airflow scouring or when the accumulated volume decreases due to gravitational vibration, the elastic pre-tightening member 128a releases the stored elastic potential energy and pushes the second filter screen 126 to automatically move downward. This dynamic compensation effect ensures that the adsorbent particle layer is always in a tight packing state, reduces the airflow tunneling effect induced by loose adsorbent particles, effectively prevents the degradation of purification performance caused by airflow short circuit, and ensures the long-term stability of the dew point of the output gas of the adsorption tower 100.

[0105] In one embodiment, the clamping member 128b is a hollow annular component. This hollow annular design provides ample space for airflow while ensuring mechanical strength. The inner ring edge of the annular component protrudes radially inward to form a stop block 128c, and multiple stop blocks 128c are spaced apart along the circumference of the inner ring of the annular component. The specific shape of the stop block 128c can be a rectangular boss, a triangular reinforcing rib, or an arc-shaped positioning tooth. During manufacturing, the stop blocks 128c and the main body of the annular component are typically integrally cast, injection molded, or formed using precision CNC machining to ensure the positional accuracy between the stop blocks 128c.

[0106] The stop block 128c serves a dual function in the structure. First, it limits the radial displacement of the elastic preload 128a. When the elastic preload 128a is installed below the clamping member 128b, its top end is constrained within the range defined by the multiple stop blocks 128c, thereby preventing the elastic preload 128a from lateral displacement, twisting, or instability due to high-pressure airflow disturbance when subjected to axial compressive force. Second, the stop block 128c also serves as a manual rotation point. Since the clamping member 128b is threadedly connected to the inner wall of the dust removal section 123, when the axial position of the clamping member 128b needs to be adjusted, the operator can insert a tool into the gap between adjacent stop blocks 128c, or directly apply circumferential torque by pressing the radial protrusion of the stop block 128c with their fingers, thereby easily tightening or loosening the clamping member 128b.

[0107] In one embodiment, a vent hole 112 is provided on the wall of the outer tube 110 for communicating with external clean gas. A second outlet 129 is provided at the lower end of the inlet section 121 for discharging gas during regeneration. The vent hole 112 can be a circular through hole, radially formed on the wall of the outer tube 110. Internal threads can be pre-machined at the vent hole 112 for connection to external pipelines. The second outlet 129 is located at the bottom end or near the bottom end of the inlet section 121, with its opening facing downwards or to the side, for connection to external discharge pipelines. A one-way valve or electromagnetic switching valve can be added at the connection between the second outlet 129 and the external pipeline to precisely control the flow of air. Both the vent hole 112 and the second outlet 129 can be sealed by welding or threading metal pipe fittings to the tube body.

[0108] During regeneration, the second outlet 129 is opened, reducing the air pressure inside the inner tube 120. The pressure inside the outer tube 110 is greater than that inside the inner tube 120, allowing clean gas to enter the outer tube 110 through the vent 112. Since an annular gap is formed between the outer tube 110 and the inner tube 120, the clean gas first fills this gap. Driven by the pressure difference, the clean gas radially inwards through the filter layer 127 on the side wall of the dust removal section 123 and enters the interior of the dust removal section 123. The gas then flows downwards, passing sequentially through the second filter 126, the adsorbent in the adsorption section 122, and the first filter 125, entering the inlet section 121, and finally exiting from the second outlet 129. The opening and closing of the second outlet 129 can be controlled by the solenoid valve 130.

[0109] In this regeneration mode, the gas flow direction is opposite to that in the purification mode, forming a counter-current regeneration path and producing a significant backwashing effect. During the counter-current regeneration process, dry, clean gas passes through the adsorbent from top to bottom, carrying away the moisture and impurities adsorbed inside the adsorbent. Simultaneously, as the gas flows in the reverse direction through the filter layer 127, the first filter screen 125, and the second filter screen 126, it blows away the adsorbent dust adhering to the surfaces of these elements, achieving self-cleaning of the filter layer 127, the first filter screen 125, and the second filter screen 126. This structural design not only extends the service life of the core adsorption section 122 but also greatly improves the automated regeneration efficiency of the adsorption tower 100, ensuring the reliability of the adsorption tower 100 during continuous operation.

[0110] In one embodiment, the adsorption tower 100 further includes a regeneration gas chamber 113. The regeneration gas chamber 113 is connected to the outer pipe body 110 through a vent 112. Specifically, the regeneration gas chamber 113 can be a metal tank welded to the outer wall of the outer pipe body 110, or an independent cylindrical container connected to the vent 112 via a high-pressure hose and connector. Its material is typically chosen for its good pressure resistance and chemical stability, such as aluminum alloy, stainless steel, or carbon steel with rust-proof inner walls. The volume of the regeneration gas chamber 113 is proportioned according to the amount of adsorbent loaded in the adsorption tower 100 to ensure that the stored clean gas is sufficient to complete one complete backwash cycle.

[0111] Under purification conditions, the gas to be treated is dried in the adsorption section 122 and then enters the dust removal section 123. It then radially passes through the filter layer 127 and enters the annular gap between the inner tube 120 and the outer tube 110. After the gas collects in the annular gap, a portion of the gas is discharged from the first outlet 111 of the outer tube 110 for use by downstream equipment. The other portion of the gas enters the regeneration gas chamber 113 through the vent 112 and is stored there. The gas entering the regeneration gas chamber 113 is clean gas that has undergone deep drying in the adsorption section 122 and precise filtration in the dust removal section 123; it has a low dew point and is free of impurities.

[0112] Under regeneration conditions, the clean gas stored in the regeneration gas chamber 113 is driven by the pressure difference and flows in reverse from the regeneration gas chamber 113 into the outer pipe 110 through the vent 112. The clean gas then flows along the counter-current path through the filter layer 127, the second filter screen 126, the adsorbent, and the first filter screen 125, and is discharged from the second outlet 129, completing the backwash regeneration of the internal structure of the adsorption tower 100.

[0113] This embodiment achieves pre-storage of a portion of clean gas under purification conditions by setting a regeneration gas chamber 113 outside the adsorption tower 100, and utilizes this pre-stored gas for backflushing regeneration under regeneration conditions. The introduction of the regeneration gas chamber 113 enables the adsorption tower 100 to have energy self-balancing capability, eliminating the need for an external regeneration power source. The gas used in the regeneration process originates from the clean gas purified by the adsorption tower 100 itself, ensuring the purity of the regeneration gas and avoiding secondary pollution that may be introduced by an external gas source. The setting of the regeneration gas chamber 113 also decouples the regeneration operation from the purification conditions in time. Under purification conditions, gas can be slowly filled into the regeneration gas chamber 113, and under regeneration conditions, the regeneration gas chamber 113 can release gas instantaneously, meeting the instantaneous gas volume requirements of backflushing regeneration.

[0114] In one embodiment, two adsorption towers 100 are symmetrically mounted on the mounting plate 510, and two drain valves 300 are installed between the two adsorption towers 100, that is, the first drain valve and the second drain valve are located in the area between the first adsorption tower 100 and the second adsorption tower 100. The first drain valve is located at the lower end of the second drain valve, and the shells of the first drain valve and the second drain valve are integrally formed. The two ends of the shells are respectively fixed to the outer walls of the outer tubes 110 of the first adsorption tower 100 and the second adsorption tower 100.

[0115] One end of the first drain valve is connected to the gas-liquid separator 400, and the other end is used to connect to the air inlet of the first adsorption tower 100 or the second adsorption tower 100, i.e., the tower body air inlet 124. Specifically, the first drain valve has a common interface 311 and two switching interfaces 312. The common interface 311 is connected to the separator outlet 440 of the gas-liquid separator 400, and the two switching interfaces 312 are respectively connected to the tower body air inlet 124 of the first adsorption tower 100 and the tower body air inlet 124 of the second adsorption tower 100. The internal valve core 330 of the first drain valve moves automatically under the action of the pressure difference between the two ends, so that the common interface 311 is alternately connected to one of the switching interfaces 312, thereby realizing the alternating delivery of the gas discharged from the gas-liquid separator 400 to the first adsorption tower 100 or the second adsorption tower 100.

[0116] One end of the second vent valve is connected to the gas storage chamber 500, and the other end is used to connect to the gas outlet of the first adsorption tower 100 or the second adsorption tower 100, i.e., the first gas outlet 111. Specifically, the second vent valve also has a common interface 311 and two switching interfaces 312. The common interface 311 is connected to the gas inlet of the gas storage chamber 500, and the two switching interfaces 312 are respectively connected to the first gas outlet 111 of the first adsorption tower 100 and the first gas outlet 111 of the second adsorption tower 100. The internal valve core 330 of the second vent valve also automatically switches according to the pressure difference between the two ends, so that the common interface 311 is alternately connected to one of the switching interfaces 312, thereby transporting the dry gas output from the adsorption tower 100 in the adsorption state to the gas storage chamber 500 for storage.

[0117] By installing two relief valves 300 between two adsorption towers 100 and symmetrically arranging the two towers 100, a compact gas path layout is formed. The first relief valve is responsible for inlet gas distribution, and the second relief valve is responsible for outlet gas collection. Working together, they achieve automatic switching between alternating adsorption and regeneration of the two towers without the need for external electrical control. The symmetrical installation of the two adsorption towers 100 places the center of gravity of the entire unit at the center of the mounting plate 510, resulting in balanced stress and improved equipment stability. The relief valves 300, located between the two towers, shorten the length of the connecting pipelines, reducing pressure drop and leakage risks, while also facilitating maintenance and repair. This layout makes full use of the planar space of the mounting plate 510, making the overall structure more compact and suitable for installation and use in limited spaces.

[0118] In one embodiment, a drain valve 300, see [reference] Figures 11-17 The valve body 310 includes a common interface 311 in the middle for connecting to the main pipeline of the system, and two switching interfaces 312 symmetrically arranged at both ends. This three-port flow channel design, combined with the internal through-flow fluid channel, forms the physical basis for supporting multi-directional fluid flow.

[0119] Inside the fluid passage of the valve body 310, a pair of valve seats 320 are fixedly installed in a centrally symmetrical manner. Each valve seat 320 is not only a physical support component, but also defines an independent valve chamber. The valve chamber, as the core transit space for fluid exchange, has one end that remains normally open to the central common interface 311, while the other end points to the corresponding switching interface 312. This structural design ensures that the fluid, after entering the valve chamber, has the possibility of flowing in different directions. The valve seats 320 can be made of corrosion-resistant and high-strength materials such as stainless steel, high-strength aluminum alloy, or engineering plastics to withstand the erosion and pressure loads of different fluid media.

[0120] The valve core 330, as a moving component that performs flow channel switching, is slidably positioned across and between the two valve chambers. Driven by the pressure difference between its two ends, the valve core 330 undergoes axial displacement. When the pressure at one end is higher than the other, the resultant force generated by the pressure difference pushes the valve core 330 towards the low-pressure side. At the end of its travel, the end structure of the valve core 330 forms a sealing fit with the switching interface 312 on the low-pressure side, thereby closing the flow channel on that side; simultaneously, the high-pressure side switching interface 312, which was originally closed, is opened. This dynamic logic of alternating closure and opening allows the fluid to automatically switch flow directions based on the system's own pressure fluctuations without external control interference.

[0121] This embodiment utilizes the pressure energy of the medium itself to drive the valve core 330, eliminating the reliance on electromagnetic drive components, sensors, and complex electronic control logic for the valve 300. This purely mechanical differential pressure response mechanism significantly improves the reliability of the switching action, especially under harsh conditions such as high-frequency switching or flammable and explosive environments, effectively avoiding safety hazards caused by electrical failures. Furthermore, the symmetrical layout of the valve seat 320 and valve cavity ensures force balance during flow channel switching, reducing friction and wear of moving parts, thereby extending the overall maintenance cycle and service life of the device.

[0122] In one embodiment, the valve seat 320 is composed of a locking element 321, a limiting sleeve 322, and a baffle seat 323 arranged sequentially and tightly in the axial direction. The locking element 321 serves as the axial fastening power source for the entire assembly. Its outer peripheral wall is provided with locking threads, which, through engagement with the internal threads on the inner wall of the valve body 310, convert rotational torque into axial clamping force. The locking element 321 can be made of chrome-plated carbon steel or high-strength alloy steel to ensure the reliability and fatigue resistance of the threaded connection.

[0123] The limiting sleeve 322, a key component defining the axial length of the valve cavity, is located between the locking member 321 and the baffle seat 323. The limiting sleeve 322 is typically a hollow cylindrical tubular structure, with its axial end faces machined for flatness to ensure tight contact with adjacent components. The baffle seat 323 is located at the innermost side of the valve seat 320 and directly bears the fluid distribution function. In the assembled state, the screwing action of the locking member 321 transfers the axial load sequentially to the limiting sleeve 322 and the baffle seat 323, ultimately firmly pressing the baffle seat 323 against the pre-set stepped or stepped surface on the inner wall of the valve body 310. This method of fixing through mechanical pressing avoids complex welding or adhesive processes, greatly improving the mechanical stability of the internal structure.

[0124] A closed and controlled valve chamber is formed by the inner diameter surface of the locking element 321, the inner diameter surface of the limiting sleeve 322, and the inner surface of the baffle seat 323. This valve chamber not only serves as a physical channel for fluid exchange but also provides precise stroke space for the reciprocating movement of the valve core 330. The limiting sleeve 322 and the baffle seat 323 can be made of stainless steel, brass, or erosion-resistant composite ceramic materials, depending on the characteristics of the medium. This three-in-one combined valve seat 320 design ensures a high degree of consistency in the valve chamber geometry, and the opening and closing stroke of the valve core 330 can be precisely controlled by adjusting the axial length of the limiting sleeve 322. In addition, this split configuration allows for independent replacement of each component, significantly reducing the maintenance difficulty and parts replacement cost after long-term wear.

[0125] In one embodiment, the valve core 330, serving as the core actuator for flow path switching, primarily comprises a connecting rod 331 and baffle assemblies 332 symmetrically fixed to both ends of the connecting rod 331. The connecting rod 331, acting as a rigid frame for power transmission, spans between the two valve chambers. It can be made of stainless steel, alloy steel, or surface-hardened metal rods to ensure sufficient axial rigidity and fatigue resistance during frequent reciprocating linear motion. The baffle assemblies 332, as components directly in contact with the fluid and providing a sealing function, have precisely designed outer diameters that confine them within the corresponding valve chambers.

[0126] During dynamic operation, the baffle assembly 332 is configured to displace under the influence of the fluid pressure difference generated across the valve core 330. When the fluid pressure in one valve chamber exceeds that of the other, the resulting pressure difference acts on the connecting rod 331 through the baffle assembly 332, driving the entire valve core 330 to slide axially towards the low-pressure side. This displacement causes the baffle assembly 332 on the low-pressure side to move towards the corresponding switching interface 312 and eventually abut, thereby physically cutting off the flow path on that side. Simultaneously, the baffle assembly 332 on the high-pressure side moves away synchronously with the connecting rod 331, releasing the flow path of the switching interface 312 on that side. The baffle assembly 332 can be constructed as a single-layer or multi-layer stacked disc-shaped structure. Its material can be selected from synthetic rubber, fluoroplastics, or a composite structure of metal substrate and elastic sealing layer with a certain degree of elasticity, to balance mechanical strength and airtightness.

[0127] In one embodiment, the locking member 321 has a first through hole 321a extending through its axial direction in the middle, which directly serves as the terminal flow channel connecting the valve chamber and the switching interface 312. Meanwhile, the baffle seat 323 adopts a double-hole design, with a second through hole 323a in its middle and multiple third through holes 323b distributed circumferentially. In this arrangement, the valve chamber achieves controlled communication with the switching interface 312 through the first through hole 321a, and achieves constant communication with the common interface 311 through the third through holes 323b. This multi-hole spatial arrangement allows fluid input from the common interface 311 to enter the valve chamber through the third through holes 323b around the baffle seat 323, and then selectively exit through the first through hole 321a in the center of the locking member 321 according to the position of the valve core 330, achieving a scientific distribution of fluid dynamics.

[0128] The connecting rod 331, as an integral actuator, has its two ends passing through the second through holes 323a in the middle of the two baffle seats 323 and extending into the corresponding valve chambers, thereby rigidly linking the motion states of both sides. To achieve reliable flow path interruption, the outer diameter of the baffle assembly 332 is configured to be larger than the diameters of the first through hole 321a and the second through hole 323a, respectively. When the valve core 330 is pressed and displaced to the end of its stroke, the baffle assembly 332 can completely cover and press against the end face of the first through hole 321a, thereby cutting off the flow path to the switching interface 312. The baffle assembly 332 can adopt a composite structure of a rubber sealing layer and a metal skeleton, utilizing its radial dimension advantage to cover the first through hole 321a, while its back side can abut against the central area of ​​the baffle seat 323 to achieve axial limitation. The outer diameter of the baffle assembly 332 is configured to be larger than the diameter of the second through hole 323a, so that the baffle assembly 332 will not detach from the second through hole 323a of the baffle seat 323.

[0129] The axial projection of the baffle assembly 332 and the axial projection of the third through hole 323b are configured not to completely overlap. When the valve core 330 moves inward and abuts against the baffle seat 323, the edge of the baffle assembly 332 will not completely block the circumferentially distributed third through holes 323b, thereby ensuring that there is always physical space for fluid circulation between the common interface 311 and the valve cavity. The third through hole 323b can be machined into an oblong hole, a fan-shaped hole, or a circular array of holes, etc., to maximize the flow area while ensuring support strength.

[0130] In one embodiment, the outermost radial edge of the locking member 321 is a ring-shaped abutment surface 321b, which is a flat ring-shaped surface. In the assembled state, this ring-shaped abutment surface 321b acts directly on the end of the limiting sleeve 322, firmly pressing it into a preset position through axial load. This edge abutment design ensures uniform transmission of the fastening force and effectively prevents the limiting sleeve 322 from displacing under complex pressure pulsations.

[0131] The annular sealing seat 321c is located in the central region of the annular contact surface 321b and protrudes significantly into the valve cavity. The first through hole 321a axially penetrates the center of the annular sealing seat 321c, forming the core channel for fluid discharge. The surface of the annular sealing seat 321c is specifically configured as a sealing interface for physical contact with the moving baffle assembly 332. Because the annular sealing seat 321c has an axial height difference relative to the annular contact surface 321b and protrudes inward, the sealing interface is closer to the movement trajectory of the baffle assembly 332, shortening the effective sealing stroke.

[0132] In one embodiment, an elastic sealing ring 324 is provided between the locking member 321 and the limiting sleeve 322. The elastic sealing ring 324 is placed in the physical gap at the junction of the locking member 321 and the limiting sleeve 322. The axial clamping force generated when the locking member 321 is screwed into the valve body 310 causes the elastic sealing ring 324 to undergo radial or axial elastic deformation in the confined space, thereby blocking the path of fluid leakage outward along the component connection gap.

[0133] In one embodiment, see Figures 11-17The baffle assembly 332 includes a first baffle 333 and a second baffle 334 arranged sequentially along the axial direction. The first baffle 333 is made of rubber and is located near the locking member 321, while the second baffle 334 is made of metal and is located near the baffle seat 323. The baffle assembly 332 provided in this embodiment adopts a functionally layered composite configuration. By arranging components with different material properties axially, it achieves a synergistic improvement in sealing performance and mechanical strength. The baffle assembly 332 is divided into a first baffle 333 and a second baffle 334 arranged sequentially along the axial direction. The first baffle 333, as an elastic element that directly performs the sealing action, is located near the first through hole 321a, i.e., facing the locking member 321. The first baffle 333 is made of a rubber material with high resilience and excellent physical sealing properties, such as fluororubber, nitrile rubber or silicone rubber, to compensate for the gap between the sealing surfaces through its own slight elastic deformation when it abuts against the locking member 321, thereby ensuring the absolute airtightness of the switching interface 312 in the closed state.

[0134] The second baffle 334, serving as the rigid framework and load-transfer component of the baffle assembly 332, is positioned adjacent to the first baffle 333 and close to the baffle seat 323. The second baffle 334 is made of metal, typically stainless steel, brass, or high-strength alloy steel. Structurally, the second baffle 334 is a flat disc or a sheet-like component with reinforcing ribs. Its rigid support ensures that the first baffle 333 will not undergo excessive deformation or edge overturning when subjected to high-pressure fluid impact. This combination of metal and rubber provides the baffle assembly 332 with both soft-seal characteristics and a robust mechanical limiting foundation, effectively coping with the impact loads generated by frequent system reversals.

[0135] The rubber material of the first baffle 333 ensures immediate sealing response under low pressure differential conditions, while the metal material of the second baffle 334 solves the problem of fatigue damage or being squeezed into the channels of rubber components under long-term high-frequency impact. When the valve core 330 moves towards the baffle seat 323, the metal second baffle 334 can mechanically abut against the baffle seat 323 and play a reliable stroke limiting role, preventing frictional loss caused by direct contact between the elastic sealing material and the baffle seat 323. Through this complementary cooperation of soft and hard materials, the baffle assembly 332 significantly improves the fatigue resistance of the core moving components while ensuring the tightness of the valve 300 switching, providing physical protection for the long-term stable operation of the drying and purification system.

[0136] In one embodiment, the connecting rod 331 has external threads at both ends and is equipped with nuts 335. The nuts 335 press and fix the baffle assembly 332 to the end of the connecting rod 331, and the outer diameter of the nuts 335 is smaller than the diameter of the first through hole 321a. The connecting rod 331, as the transmission center running through the entire flow channel, has external threads machined at both ends located inside the valve cavity. These external threads can be standard fine threads or trapezoidal threads to enhance the self-locking performance of the connection. Each end of the connecting rod 331 is fitted with a nut 335, and the engagement of the nut 335 with the external thread generates an axial clamping force. The nut 335, as a key fastening element, can be a hexagonal nut 335, a round nut 335, or a flange nut 335 with an anti-loosening structure. Its material is typically stainless steel or hard alloy that matches the connecting rod 331 to ensure chemical stability under long-term fluid scouring conditions.

[0137] In one embodiment, the surface of the first baffle 333 is provided with an annular boss 333a along its circumference, and the surface of the nut 335 is provided with an annular groove 335a that matches the annular boss 333a. When the nut 335 presses and fixes the baffle assembly 332 to the end of the connecting rod 331, the annular boss 333a is embedded in the annular groove 335a. This embodiment further optimizes the mechanical connection strength and sealing stability of the valve core 330 end, and achieves radial limiting and anti-dislodgement functions between components through specific micro-morphological matching. The surface of the first baffle 333 is constructed with an annular boss 333a along its circumference. The annular boss 333a is a continuous or discontinuous annular ridge extending axially from the baffle plane. Correspondingly, the pressing end face of the nut 335 is machined with an annular groove 335a that perfectly matches the annular boss 333a in geometric dimensions and spatial position. The polarity matching of the boss and the groove forms a set of mechanical interlocking interfaces at the end of the connecting rod 331.

[0138] During assembly, when the nut 335 tightens and fixes the baffle assembly 332 to the end of the connecting rod 331 through threaded engagement, the annular boss 333a on the surface of the first baffle 333 is axially compressed and completely embedded in the annular groove 335a on the surface of the nut 335. Through the precise coupling of the annular boss 333a and the annular groove 335a, the constraint force of the nut 335 on the first baffle 333 is transformed from simple end-face friction to mechanical shear resistance, greatly improving the stress state of soft rubber materials under high-speed switching conditions. In addition, this structure also plays a role in automatic centering, ensuring that the first baffle 333 always remains coaxial with the connecting rod 331, thereby ensuring the circumferential consistency of the sealing interface when sealing the first through hole 321a. This interlocking design effectively avoids the risk of uneven wear or dislodgement of the seal due to long-term impact, providing a reliable mechanical guarantee for the long-term operation of the valve 300.

[0139] In the description of this specification, the use of terms such as "Embodiment 1," "this embodiment," or "in one embodiment" indicates that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example; moreover, the specific features, structures, materials, or characteristics described may be combined in any appropriate manner in one or more embodiments or examples.

[0140] In the description of this specification, the terms "connection," "installation," "fixing," "setting," and "having" are interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0141] In the description of this specification, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0142] The above description of the embodiments is intended to enable those skilled in the art to understand and apply the technology of this invention. Those skilled in the art can easily make various modifications to these examples and apply the general principles described herein to other embodiments without creative effort. Therefore, this invention is not limited to the above embodiments. Modifications in the following situations should be within the scope of protection of this invention: ① New technical solutions implemented based on the technical solution of this invention and combined with existing common knowledge, where the technical effects of the new technical solution do not exceed the technical effects of this invention; ② Equivalent substitutions of some features of the technical solution of this invention using known technology, resulting in the same technical effects as those of this invention; ③ Extendable technical solutions based on the technical solution of this invention, where the substantive content of the extended technical solution does not exceed the technical solution of this invention; ④ Equivalent transformations made using the content of this specification and drawings, directly or indirectly applied to other related technical fields.

Claims

1. A method of nanofiltration of a gas, characterized in that, Including the execution steps of the adsorption process: S1. The gas to be cleaned enters the gas-liquid separator for gas-liquid separation and coarse filtration to remove liquid impurities and large particulate solid impurities from the gas, thus obtaining preliminarily purified gas. S2. Based on the switching logic, the pre-purified gas is alternately delivered to two adsorption unit groups for deep adsorption purification. The adsorption unit sequentially completes the adsorbent dehydration treatment and the fine dust interception treatment to obtain clean gas. S3. A portion of the clean gas is transported to a gas storage chamber for storage, and another portion is transported to a regeneration gas chamber for pre-storage, for use in the regeneration cycle of the subsequent adsorption unit. In the adsorption condition, the drain channel of the adsorption unit in the adsorption state is kept closed, the drain channel of the adsorption unit in the regeneration state is kept open, and the internal pressure of the adsorption unit in the adsorption state is greater than the internal pressure of the adsorption unit in the regeneration state. The gas nano-purification method is based on a gas nano-purifier, which includes a mounting base and a gas storage chamber fixed to the mounting base and extending upward to form a mounting plate. A gas passage hole is provided in the middle of the mounting plate, penetrating its body. A first adsorption tower and a second adsorption tower for performing a second purification of the gas are symmetrically mounted on the mounting plate, and a pair of drain valves are integrated in the gap between the first and second adsorption towers. A gas-liquid separator for performing a first purification is also mounted on the mounting plate. One end of one drain valve is connected to the gas-liquid separator, and the other end is controlled to switch to the inlet end of either the first or second adsorption tower. One end of the other drain valve is controlled to switch to the outlet end of either the first or second adsorption tower, and the other end is connected to the gas storage chamber via an exhaust pipe. The exhaust pipe is axially arranged through the gas passage hole. The gas-water separator includes a separator inlet and a swirl assembly. The swirl assembly consists of nested swirl blades and a guide tube. The swirl blades include an outer ring and an inner ring arranged coaxially, and several blades spaced between them at acute or obtuse angles to the axial direction of the outer ring. The separator inlet is located above the swirl blades. The guide tube is a cylindrical structure that passes through the center of the inner ring, and its interior has several axially extending gas channels. The gas-water separator also includes a primary filter element and a separator outlet. The internal cavity of the primary filter element is sealed and connected to the top outlet of the guide tube. The gas in the cavity passes through the filter element wall and is discharged through the separator outlet. The adsorption tower includes an outer tube and an inner tube housed within it. The inner tube is divided from bottom to top into an inlet section, an adsorption section filled with adsorbent, and a dust removal section with a sidewall filter layer. The inlet section has an air inlet for gas entry, and the axial ends of the adsorption section are limited by a first filter and a second filter, respectively. Under purification conditions, the gas enters the inner tube and flows axially through the adsorption section and the dust removal section, then radially passes through the filter layer into the annular gap between the inner and outer tubes, and converges at a first outlet on the outer tube wall. A second outlet is provided at the lower end of the inlet section. The adsorption tower also includes a regeneration gas chamber, which is connected to the outer tube. The valve includes a valve body with a common interface and a pair of switching interfaces. A pair of valve seats are fixed in the valve body and are symmetrically distributed. The valve cavity formed inside each valve seat controls the common interface and the corresponding switching interface to be connected. A slidable valve core is provided between the two valve cavities. The valve core generates axial displacement under the action of the pressure difference at both ends, so as to alternately close one of the switching interfaces and simultaneously open the other switching interface.

2. The method of claim 1, wherein, In S1, the gas to be cleaned enters the gas-liquid separator for gas-liquid separation and coarse filtration. Specifically, the gas to be cleaned first passes through the swirl vanes of the swirl vane assembly to form a swirling flow for centrifugal gas-liquid separation, then passes through the axial gas channel of the guide tube for gravity sedimentation separation, and finally passes through the primary filter element for coarse filtration to obtain preliminarily purified gas.

3. The gas nano-purification method according to claim 2, characterized in that, The adsorption unit in S2 sequentially performs adsorbent dehydration and fine dust interception treatment, specifically including: S21. The pre-purified gas enters the inner tube inlet section from the tower inlet of the adsorption unit and flows axially from bottom to top to the adsorption section. S22. The pre-purified gas comes into contact with the adsorbent in the adsorption section. The adsorbent dehydrates the moisture in the gas to obtain the dehydrated gas. S23. After dehydration, the gas continues to flow axially from bottom to top to the dust removal section, and radially passes through the filter layer of the dust removal section. The filter layer intercepts the fine dust in the gas, completing the fine dust interception treatment and obtaining clean gas. S24. Clean gas enters the annular gap between the inner tube and the outer tube and collects, and then exits from the first outlet of the adsorption unit.

4. The gas nano-purification method according to any one of claims 1-3, characterized in that, The switching logic of S2 specifically includes: when the adsorption unit in adsorption mode meets the preset adsorption switching conditions, an adsorption switching command is triggered to deliver preliminary purified gas to another adsorption unit. The preset adsorption switching conditions are: the actual adsorption time of the adsorption unit in adsorption mode reaches the preset adsorption time; or the liquid level of water removed from the adsorption unit in adsorption mode reaches the preset liquid level height; or the pressure value inside the adsorption unit in adsorption mode reaches the preset pressure threshold.

5. The gas nano-purification method according to claim 4, characterized in that, The method further includes a regeneration cycle step, which is triggered in conjunction with an adsorption switching command, specifically including: S41. After triggering the adsorption switching command, first close the sewage discharge channel of the adsorption unit in the regeneration state, so that the pre-purified gas enters the two adsorption units at the same time. The internal pressure of the adsorption unit in the regeneration state rises slowly as the gas enters, until the internal pressure of the two adsorption units is the same, and the pressure equalization operation is completed. S42. Open the sewage discharge channel of the adsorption unit that was originally in the adsorption mode, so that the adsorption unit enters the regeneration mode. The pre-purified gas discharged from the gas-liquid separator is transferred to the adsorption unit that was originally in the regeneration mode, and the adsorption unit that was originally in the regeneration mode enters the adsorption mode. S43. In the adsorption unit entering the regeneration mode, the clean gas pre-stored in the regeneration gas chamber enters the adsorption unit along the reverse path of the original adsorption purification and is discharged from the sewage discharge channel of the adsorption unit to complete the regeneration cycle.

6. The gas nano-purification method according to claim 5, characterized in that, The adsorption conditions and regeneration cycle steps are automatically switched by a pair of valves. The pair of valves includes a first valve and a second valve. The first valve controls the delivery and distribution of the pre-purified gas to the adsorption unit group, and the second valve controls the delivery of the clean gas to the gas storage chamber. The valve core of the valve moves automatically based on the pressure difference between the adsorption units to complete the gas path switching.

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