A high pressure microchannel particle comminution system

Abstract

The present application relates to a kind of high-pressure microchannel particle pulverizing system, comprising: microchannel collision generation device and control driving device;The control driving device includes: air compressor, pressure reducing filter regulating valve, gas-liquid booster, low-pressure water source, import check valve, export check valve, pressure storage tank, pneumatic needle valve, mechanical reversing valve, raw material tank, product storage tank;The microchannel collision generation device includes: upper runner body, lower runner body, shunt cavity, flow guide pipe, jet pipe;The microchannel collision generation device uses high-pressure static sealing technology, and sealing is completed by the composite sealing mode of high-strength bolt fastening assembly, metal sealing gasket and taper sealing joint combination.Compared with prior art, the present application has corrosion resistance, high pressure resistance, strong airtightness and other performances, and the processing flow is simplified by optimizing the microchannel structure design, and the flow and collision pulverization of high-speed fluid in microchannel are effectively controlled.

Description

Technical Field

[0001] This invention relates to the field of microfluidics technology under high pressure, and in particular to a high-pressure microchannel particle pulverizing system. Background Technology

[0002] Microfluidics is a technology that integrates basic operational units such as sample preparation, reaction, separation, and detection in biological, chemical, and medical analysis processes onto a chip at the micrometer scale. Microchannel devices are miniaturized fluid control systems that can be used to achieve microfluidic manipulation and analysis. The dimensions of microscale channels are typically on the micrometer or nanometer scale. At a tiny scale, high-pressure, high-speed microjets induce mutual compression, friction, and shearing between materials, achieving the purpose of breaking down and refining material particles.

[0003] In modern industry and scientific research, microchannel pulverization equipment operating under high pressure has gradually become a key tool for material processing and nanotechnology due to its unique advantages. When high-pressure-driven fluid flows through tiny channels, it is constrained by the channel walls, forming a high-speed jet. This high-speed jet generates strong shear and impact forces as it flows within the microchannel. When the high-speed fluid collides head-on within the microchannel, the enormous kinetic energy acts on the material, producing a powerful pulverizing effect. Through the processes of fluid flow and collision, high-pressure microchannel pulverization technology converts mechanical energy into internal energy or fragmentation energy, and utilizes the tiny size of the microchannel to highly concentrate this energy and apply it to the material particles, thereby achieving efficient and fine pulverization.

[0004] Under high-voltage conditions, some problems that need to be solved with existing microchannel chips are:

[0005] 1. Particle grinding is a complex physical process that typically requires significant mechanical or impact forces to disrupt the internal structure of particles and reduce their size. Conventional microfluidic technologies usually employ relatively low pressures or external forces (such as gravity, surface tension, electroosmosis, etc.) to drive the fluid. These driving methods have relatively limited pressure ranges and are insufficient to achieve the high pressures and impact forces required for particle grinding.

[0006] 2. Conventional microchannel chips are typically fabricated using planar milling technology combined with top and bottom cover plates. However, under high-pressure operating conditions, the joint between the planar-milled top and bottom cover plates needs to withstand enormous pressure. This pressure can lead to leakage, deformation, or even cracking at the joint, thereby affecting the performance and reliability of the microchannel chip.

[0007] 3. Conventional microfluidic chip materials are prone to deformation or cracking under high pressure, making it difficult to meet high-pressure requirements. High-pressure operating conditions place higher demands on chip sealing performance. Existing sealing technologies, such as simple bonding, O-ring sealing, or sealant filling, often fail to maintain a stable sealing effect under high pressure for a long period of time.

[0008] 4. Under high pressure, the interaction between the fluid and the microchannel wall is enhanced, resulting in a more pronounced boundary layer effect. The fluid flow characteristics will change significantly, and conventional microfluidic control methods will reduce the accuracy of fluid control and affect the accuracy of experimental results. Summary of the Invention

[0009] The purpose of this invention is to overcome the defects of the existing technology and provide a high-pressure microchannel particle pulverizing system with properties such as corrosion resistance, high pressure resistance, and strong sealing. By optimizing the microchannel structure design, the processing flow is simplified, and the flow and collision pulverization of high-speed fluid in the microchannel are effectively controlled.

[0010] This invention provides a high-pressure microchannel particle pulverizing system, comprising: a microchannel collision generating device and a control and driving device;

[0011] The control and drive device includes: an air compressor, a pressure reducing filter regulating valve, a gas-liquid booster, a low-pressure water source, an inlet check valve, an outlet check valve, a pressure tank, a pneumatic needle valve, a mechanical reversing valve, a raw material tank, and a product storage tank.

[0012] The inlet and outlet check valves of the gas-liquid booster are installed at the inlet and outlet to ensure the unidirectional flow and stability of the system. The pressure tank is used to store the pressurized liquid required by the system, providing a stable pressure source. The raw material tank is a device for storing material particles. When the high-pressure fluid flows through the raw material tank through the pipeline, it carries the material particles into the microchannel collision generator for collision.

[0013] The microchannel collision generating device includes: an upper flow channel, a lower flow channel, a flow divider, a guide tube, and a jet tube; one end of the upper flow channel is connected to the raw material tank of the control and drive device, and the other end is connected to one end of the lower flow channel; the other end of the lower flow channel is connected to the product storage tank; the flow divider, the guide tube, and the jet tube are disposed on the lower flow channel.

[0014] The control and drive device pressurizes the fluid supplied by the low-pressure water source by controlling the gas-liquid booster, and then transports the pressurized fluid to the pressure storage tank for pressure maintenance. Subsequently, the fluid is controlled to enter the microchannel collision generator for impact crushing by the mechanical reversing valve and the pneumatic needle valve. The crushed fluid and particles are collected in the product storage tank.

[0015] During system operation, low-pressure water enters the gas-liquid booster through the inlet check valve. The air compressor provides compressed air, and the pressure reducing filter regulating valve controls the gas pressure. The compressed air drives the piston of the gas-liquid booster to pressurize the fluid. After pressurization, the fluid enters the pressure storage tank through the outlet check valve for pressure holding. When the mechanical reversing valve opens the pneumatic needle valve, the high-pressure fluid carries the particles to be collided in the raw material tank into the microchannel collision generator for impact and crushing. The fluid containing the particles to be collided passes through the crusher outlet and is collected in the product storage tank.

[0016] The microchannel collision generator employs high-pressure static sealing technology, using a composite sealing method combining high-strength bolt fastening kits, metal sealing gaskets, and conical sealing joints to achieve a seal. This ensures long-term stable operation of the system without leakage under high-pressure conditions. The sealing type of the high-pressure microchannel particle pulverizing system is high-pressure static sealing. It mainly consists of two parts: one is the connection between the material inlet and the gas-liquid booster pump, and the other is the upper and lower mold seals. The former uses a conical sealing joint to connect the pipeline. When the two conical surfaces are tightly fitted, the tiny gap between the conical surfaces is compressed, forming a tight fit, effectively preventing leakage of high-pressure fluid and achieving a reliable seal under high pressure. At the same time, the conical sealing joint usually has self-tightening characteristics, meaning that the sealing effect improves with increasing pressure. The latter uses a metal sealing method, applying pressure to the metal sealing plate by fastening the upper and lower molds with high-strength bolts to form a tight fit and achieve a seal.

[0017] Furthermore, the outlet of the gas-liquid booster is equipped with a high-pressure gauge to monitor pressure changes and to test the sealing effect of the platform; the compressed air inlet of the gas-liquid booster is equipped with a gas pressure gauge and an intake switch to control the fluid boosting pressure. The fluid boosting ratio is approximately the area ratio of the large and small pistons in the gas-liquid booster. The gas pressure gauge is responsible for monitoring the pressure in the high-pressure microchannel particle pulverizing system, ensuring that the system operates within a safe pressure range, and can adjust system parameters based on pressure readings.

[0018] Furthermore, the low-pressure water source is connected to a filter, which filters out impurities in the fluid. The filter filters out impurities in the liquid entering the system, protecting the internal components of the system from contamination and wear.

[0019] Furthermore, both the upper and lower flow channels are made of 316L stainless steel, and the inlet and outlet of the upper and lower flow channels are provided with multiple through holes with threads to accommodate high-strength bolt fastening kits for mechanical sealing of the upper and lower flow channels.

[0020] Furthermore, the upper part of the upper flow channel is machined with a threaded hole for connecting to the raw material tank, and a micro-jet hole is drilled on the connection threaded hole for connecting to the conical sealing joint of the raw material tank; the size of the flow divider, the guide pipe and the jet pipe decreases step by step, forming a channel structure for the fluid to be accelerated and pressurized step by step. Under the combined effect of the increase in flow velocity and the increase in fluid pressure, the particles are more likely to break when they are impacted by the fluid.

[0021] The upper part of the upper flow channel body is machined with a flow channel inlet and tapped with threads, and micro-flow channel through holes are machined downward on the basis of the flow channel inlet; the micro-flow channel through holes disperse the high-pressure fluid into flow streams with opposite flow directions, so as to better contact and crush the particles; due to the small size of the through holes, the fluid will form a high-speed jet when passing through, and the powerful impact force and shear force of the jet can effectively break the particles.

[0022] Traditional microfluidics relies on the bonding or bolting of upper and lower molds to create flow channels. The lower mold has a fully machined open groove forming the flow channel, while the upper mold acts as a flat cover without a flow channel. Under high pressure, this structure makes sealing between the upper and lower molds difficult, easily leading to leakage. This invention proposes a three-dimensional microfluidic channel structure, where longitudinal holes are machined in the lower mold to form flow channels, and the upper mold acts as a guide. This significantly reduces the sealing surface between the upper and lower molds, effectively mitigating leakage. The flow channel adopts a YT-type structure, with flow diversion through the Y-shaped channel and collision formation in the T-shaped channel for pulverization. The lower mold flow channel integrates flow cavities, guide tubes, jet tubes, and inlet / outlet microchannels. By reducing the pressure contact area, the structural pressure resistance is improved, significantly reducing the pressure at the interface of the microchannel device. To effectively reduce pressure fluctuations and concentration caused by high-pressure fluid flowing on the flow channel surface, a diversion cavity is milled on the upper surface of the lower mold. Concentrating the high-pressure fluid inside the lower mold flow channel cavity allows it to act more effectively on the particles, improving the pulverization effect.

[0023] Furthermore, the gas-liquid booster can provide high-pressure hydraulic pressure from 0.8 MPa air at a compression ratio of 510:1. The booster has a large piston and a small piston, and the pressurization process is achieved through the principle of pressure balance along the piston axis. The output pressure is proportional to the driving pressure, and the boost ratio is equal to the ratio of the force-bearing areas of the large and small pistons. The air compressor provides 0.8 MPa compressed air to the booster, and the gas pressure is controlled by a regulating valve, increasing in multiples of 510; that is, for every 0.1 MPa increase in pressure, the system pressure increases by 51 MPa. By adjusting the pressure-reducing filter regulating valve, the system can adapt to the pressure required for different particle crushing processes. Precise pressure control can effectively improve the stability and reliability of the system.

[0024] The air compressor that provides pressure and the gas-liquid booster that amplifies the pressure combine to form the high-pressure power source of the high-pressure microchannel particle pulverizing system. The gas-liquid booster can provide high-pressure hydraulic pressure from low-pressure (e.g., 0.8 MPa) air at a high compression ratio (e.g., 510:1). The gas-liquid booster contains two moving parts: a large piston and a small piston. The large piston is a pneumatic piston, while the small piston is a hydraulic piston. The gas-liquid booster utilizes the principle of force balance between the large and small pistons to achieve the pressurization process. Based on the principle of pressure balance along the piston axis, the equation P1A1 = P2A2 or... The output pressure of the gas-liquid booster is directly proportional to the driving pressure, and the boost ratio of the output pressure is equal to the ratio of the force-bearing areas of the large and small pistons.

[0025] After the fluid is pressurized by the gas-liquid booster, it is delivered to a pressure storage tank for pressure maintenance. The pressure storage tank is designed to withstand high pressure. After the fluid is delivered to the pressure storage tank, the pressure inside the tank gradually increases until it reaches a state of equilibrium with the output pressure of the gas-liquid booster. Under high-pressure conditions, the pressure storage tank can absorb fluid fluctuations caused by high pressure, ensuring more stable downstream pressure and precise pressure control.

[0026] Furthermore, the pressure-reducing filter regulating valve is used to precisely control and regulate the pressure within the system, ensuring that the system operates within an appropriate pressure range to meet the needs of different particle crushing processes.

[0027] Furthermore, the microchannel collision generator can operate stably under system pressures of 100 MPa to 400 MPa. It stores the pressurized liquid required by the system through the pressure tank, provides a stable pressure source to the system, and can absorb fluid fluctuations caused by high pressure, ensuring that the downstream pressure of the system is more stable.

[0028] Furthermore, it also includes: a gas-liquid booster pump pressure gauge and a pressure tank gauge. The gas-liquid booster pump pressure gauge monitors the pressure of the product storage tank, and the pressure tank gauge monitors the pressure of the storage tank to ensure stable system operation and test the sealing effect of the platform.

[0029] Furthermore, the upper and lower flow channels are machined; the specific processing flow includes: machining the flow divider cavity and sealing groove, preparing the guide pipe and jet pipe through holes, machining the fastening bolt through holes, and machining the inlet and outlet cone sealing joints of the device.

[0030] During assembly, it is essential to ensure the cleanliness of all flow channel components (such as the upper flow channel, lower flow channel, and metal sealing gaskets) to remove impurities or dirt that may affect the seal. All components must be checked to ensure their dimensions and specifications meet design requirements, guaranteeing proper matching and assembly. The upper and lower flow channels are sealed with metal seals, which are placed between them. When the fastening bolts are tightened, the metal seals are compressed and deformed, filling the gap between the upper and lower flow channels to form an effective seal.

[0031] After assembly, the microchannel collision generator is subjected to a sealing performance test. A certain pressure of gas or liquid is injected into the microchannel collision generator, and it is observed whether the pressure can remain stable within a specified time. Simultaneously, leakage detection instruments (such as bubble detectors, ultrasonic leak detectors, etc.) are used to detect leaks in the microchannel collision generator. During the test, carefully observe for phenomena such as bubble generation or abnormal ultrasonic signals to determine if leakage exists. If the test results show that the microchannel collision generator has good sealing performance and no leakage occurs, the assembly can be considered successful and meets the design requirements. If a leakage problem is found, it should be investigated and repaired promptly. First, determine the specific location of the leak, then analyze the cause of the leak (such as aging of the sealing gasket, insufficient tightening force, etc.), and take corresponding measures to repair it. After the repair is completed, the sealing performance test should be repeated to verify the repair effect.

[0032] Compared with the prior art, the present invention has the following advantages:

[0033] (1) This invention patent proposes a high-pressure microchannel particle pulverizing system. Through the combination of an air compressor and a gas-liquid booster, it can provide high-pressure power up to 400MPa, far exceeding the pressure range of conventional microfluidic technology. This enables the system to generate sufficient mechanical force and impact force to effectively pulverize particles. The control unit, composed of a pressure-reducing filter regulating valve, an air inlet switch, and a pneumatic needle valve, can precisely control the system pressure, allowing the system to be flexibly adjusted according to the different particle pulverizing requirements, thereby improving the system's efficiency.

[0034] (2) This invention utilizes high-strength metal materials and optimizes the microchannel structure design by employing three-dimensional guide tubes and jet tubes, effectively avoiding the high-pressure sealing problem, reducing pressure loss, and improving crushing efficiency. The progressively decreasing size of the microchannel structure allows the fluid to accelerate and increase progressively within the microchannel, enhancing the particle crushing effect.

[0035] (3) The present invention adopts high pressure static sealing technology, including a conical sealing joint and a metal seal fastened by high-strength bolts, to ensure long-term stable operation without leakage under high pressure conditions, solve the high pressure microchannel sealing problem, and provide a technical solution for high pressure environment applications. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of a high-pressure microchannel particle pulverizing system;

[0037] Figure 2 This is a physical image of a high-pressure microchannel particle pulverizing system;

[0038] Figure 3 This is a schematic diagram of the YT-type flow channel structure of the present invention.

[0039] Figure 4 The conical sealing joint of the present invention;

[0040] Figure 5 This is a schematic diagram of the microchannel collision generating device of the present invention;

[0041] Figure 6 This is a physical diagram of the microchannel collision generating device of the present invention;

[0042] Figure 7 These are particles before they are crushed by impact.

[0043] Figure 8 The particles are produced by microchannel collision pulverization under high pressure of 300 MPa.

[0044] Reference numerals: 1. Air compressor; 2. Gas pressure gauge; 3. Pressure reducing filter regulating valve; 4. Inlet switch; 5. Gas-liquid booster; 6. Low-pressure water source; 7. Filter; 8. Inlet check valve; 9. Outlet check valve; 10. Pressure tank; 11. Pneumatic needle valve; 12. Mechanical directional valve; 13. Raw material tank; 14. Microchannel collision generator; 15. Product storage tank; 16-Fastening bolt; 17-Upper flow channel; 18-Lower flow channel; 19-Diverter chamber; 20-Guide pipe; 21-Jet pipe. Detailed Implementation

[0045] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. Component models, material names, connection structures, control methods, algorithms, and other features not explicitly described in this technical solution are considered common technical features disclosed in the prior art.

[0046] Example 1

[0047] This embodiment provides a high-pressure microchannel particle pulverizing system, including: a microchannel collision generating device 14 and a control and driving device;

[0048] The control and drive device includes: an air compressor 1, a pressure reducing filter regulating valve 3, a gas-liquid booster 5, a low-pressure water source 6, an inlet check valve 8, an outlet check valve 9, a pressure tank 10, a pneumatic needle valve 11, a mechanical reversing valve 12, a raw material tank 13, and a product storage tank 15.

[0049] like Figure 1 As shown, the raw material tank 13 consists of two parts: a storage bin and a bolt plug. The storage bin is the main body of the raw material tank 13 and is used to store XLPE granules to be processed. The bolt plug consists of a bolt and a sealing gasket, and is located at the top of the storage bin. When the bolt is tightened, a tight seal is formed between the bolt plug and the storage bin, ensuring that no leakage occurs when high-pressure fluid flows through the raw material tank 13.

[0050] The inlet check valve 8 and outlet check valve 9 are installed at the inlet and outlet of the gas-liquid booster 5 to ensure the unidirectional flow and stability of the system. The pressure tank 10 is used to store the pressurized liquid required by the system and provide a stable pressure source to the system. The raw material tank 13 is a device for storing material particles. When the high-pressure fluid flows through the stainless steel pipeline through the raw material tank 13, it will carry the material particles into the microchannel collision generator 14 to collide.

[0051] like Figures 3-6 As shown, the microchannel collision generator 14 includes: an upper flow channel 17, a lower flow channel 18, a flow divider 19, a guide pipe 20, and a jet pipe 21; one end of the upper flow channel 17 is connected to the raw material tank 13 of the control drive device, and the other end is connected to one end of the lower flow channel 18; the other end of the lower flow channel 18 is connected to the product storage tank 15; the flow divider 19, the guide pipe 20, and the jet pipe 21 are disposed on the lower flow channel 18;

[0052] The control and drive device pressurizes the fluid supplied by the low-pressure water source by controlling the gas-liquid booster 5, and then transports the pressurized fluid to the pressure tank 10 for pressure maintenance. Subsequently, the fluid is controlled by the mechanical reversing valve 12 and the pneumatic needle valve 11 to enter the microchannel collision generator 14 for impact crushing. The crushed fluid and particles are collected in the product storage tank 15. Figure 1 , Figure 2 The mechanical directional valve 12 and the pneumatic needle valve 11 are controlled by the mechanical directional valve 12 to open the pneumatic needle valve 11. First, the state of the mechanical directional valve 12 is changed by operating the handle, that is, the direction of the internal flow channel of the valve is changed, so that the air source can flow to the pneumatic needle valve 11. When the pneumatic needle valve 11 receives sufficient air pressure, it opens and allows the high-pressure fluid in the pressure tank 10 to pass through; when the air pressure signal decreases or disappears, it closes to stop the fluid flow.

[0053] During system operation, fluid from low-pressure water source 6 enters gas-liquid booster 5 through inlet check valve 8. Air compressor 1 provides compressed air, and pressure reducing filter regulating valve 3 controls the gas pressure. Compressed air drives the piston of gas-liquid booster 5 to pressurize the fluid. After pressurization, the fluid enters pressure storage tank 10 through outlet check valve 9 for pressure holding. When mechanical reversing valve 12 opens pneumatic needle valve 11, high-pressure fluid carries XLPE particles from raw material tank 13 into microchannel collision generator 14 for impact and crushing. Fluid containing XLPE particles passes through the crusher outlet and is collected in product storage tank 15.

[0054] The microchannel collision generator 14 employs high-pressure static sealing technology, achieving sealing through a composite sealing method combining high-strength bolt fastening kits, metal sealing gaskets, and conical sealing joints. This ensures long-term stable operation of the system without leakage under high-pressure conditions. The sealing type of the high-pressure microchannel particle pulverizing system is high-pressure static sealing. It mainly consists of two parts: one is the connection between the material inlet and the gas-liquid booster pump, and the other is the upper and lower mold seals. The former uses a conical sealing joint to connect the pipeline. When the two conical surfaces are tightly fitted, the tiny gap between the conical surfaces is compressed, forming a tight fit, effectively preventing leakage of high-pressure fluid and achieving reliable sealing under high pressure. At the same time, the conical sealing joint usually has self-tightening characteristics, meaning that the sealing effect improves with increasing pressure. The latter uses a metal sealing method, applying pressure to the metal sealing plate by fastening the upper and lower molds with high-strength bolts to form a tight fit and achieve sealing.

[0055] In a specific embodiment, the outlet of the gas-liquid booster 5 is equipped with a high-pressure gauge to monitor its pressure changes and to detect the sealing effect of the platform; the compressed air inlet of the gas-liquid booster 5 is equipped with a gas pressure gauge 2 and an air inlet switch 4 to control the fluid boosting pressure. The fluid boosting ratio is approximately the area ratio of the large and small pistons in the gas-liquid booster 5. The gas pressure gauge 2 is responsible for monitoring the pressure in the high-pressure microchannel particle pulverizing system to ensure that the system operates within a safe pressure range, and the system parameters can be adjusted based on the pressure readings.

[0056] In a specific embodiment, the low-pressure water source 6 is connected to the filter 7, and impurities in the fluid are filtered out by the filter 7. The filter 7 filters out impurities in the liquid entering the system, protecting the internal components of the system from contamination and wear.

[0057] In a specific embodiment, both the upper flow channel 17 and the lower flow channel 18 are made of 316L stainless steel. Multiple through holes with threads are provided around the inlet and outlet of both the upper flow channel 17 and the lower flow channel 18 to accommodate high-strength bolt fastening kits for mechanical sealing. The upper flow channel 17 has a 3mm diameter through hole in its center. After the upper flow channel 17 and the lower flow channel 18 are assembled, high-speed fluid is transferred to the lower flow channel 18 through this 3mm through hole.

[0058] In a specific embodiment, the upper flow channel 17 has a threaded hole drilled on its upper part for connection with the raw material tank 13, and a micro-injection hole is drilled in addition to the threaded hole for connection with the conical sealing joint of the raw material tank 13; such as Figure 3 As shown, the dimensions of the flow divider 19, the guide tube 20, and the jet tube 21 decrease step by step, forming a channel structure in which the fluid is accelerated and increased step by step. Under the combined effect of the increase in flow velocity and the increase in fluid pressure, the particles are more likely to break when subjected to fluid impact.

[0059] The upper flow channel body 17 has a flow channel inlet machined and threaded on its upper part, and a micro-flow channel through hole drilled downward on the flow channel inlet; the micro-flow channel through hole disperses the high-pressure fluid into a flow stream with opposite flow direction, so as to better contact and crush the particles; due to the small size of the through hole, the fluid will form a high-speed jet when passing through, and the powerful impact force and shear force of the jet can effectively break the particles.

[0060] Traditional microfluidics relies on the bonding or bolting of upper and lower molds to create flow channels. The lower mold has a fully machined open groove forming the flow channel, while the upper mold acts as a flat cover without a flow channel. Under high pressure, this structure makes sealing between the upper and lower molds difficult, easily leading to leakage. This invention proposes a three-dimensional microfluidic channel structure, where longitudinal holes are machined in the lower mold to form flow channels, and the upper mold acts as a guide. This significantly reduces the sealing surface between the upper and lower molds, effectively mitigating leakage. The flow channel adopts a YT-type structure, with flow diversion through the Y-shaped channel and collision formation in the T-shaped channel for pulverization. The lower mold flow channel integrates flow cavities, guide tubes, jet tubes, and inlet / outlet microchannels. By reducing the pressure contact area, it provides structural pressure resistance and significantly reduces the pressure borne at the interface of the microchannel device. To effectively reduce pressure fluctuations and concentration caused by high-pressure fluid flowing on the flow channel surface, a diversion cavity is milled on the upper surface of the lower mold. Concentrating the high-pressure fluid inside the lower mold flow channel cavity allows it to act more effectively on the particles, improving the pulverization effect.

[0061] In a specific embodiment, the gas-liquid booster 5 provides high-pressure hydraulic pressure from 0.8 MPa air at a compression ratio of 510:1. The booster 5 has a large piston and a small piston, and the pressurization process is achieved through the principle of pressure balance along the piston axis. The output pressure is proportional to the driving pressure, and the boost ratio is equal to the ratio of the force-bearing areas of the large and small pistons. The air compressor 1 provides 0.8 MPa compressed air to the booster 5, and the pressure-reducing filter regulating valve 3 controls the gas pressure, increasing it in multiples of 510. That is, for every 0.1 MPa increase in pressure, the system pressure increases by 51 MPa. By adjusting the pressure-reducing filter regulating valve 3, the system can adapt to the pressure required for different particle crushing processes. Precise pressure control can effectively improve the stability and reliability of the system.

[0062] The air compressor 1, which provides pressure, and the gas-liquid booster 5, which amplifies the pressure, combine to form the high-pressure power source of the high-pressure microchannel particle pulverizing system. The gas-liquid booster 5 can provide high-pressure hydraulic pressure from low-pressure (e.g., 0.8 MPa) air at a high compression ratio (e.g., 510:1). The gas-liquid booster 5 contains two moving parts: a large piston and a small piston. The large piston is a pneumatic piston, while the small piston is a hydraulic piston. The gas-liquid booster utilizes the principle of force balance between the large and small pistons to achieve the pressurization process. Based on the principle of pressure balance along the piston axis, the equation P1A1 = P2A2 or... The output pressure of the gas-liquid booster is directly proportional to the driving pressure, and the boost ratio of the output pressure is equal to the ratio of the force-bearing areas of the large and small pistons.

[0063] After the fluid is pressurized by the gas-liquid booster 5, it is delivered to the pressure storage tank 10 for pressure maintenance. The pressure storage tank 10 is designed to withstand high pressure, and has a volume of 30ml. After the fluid is delivered to the pressure storage tank 10, the pressure inside the tank gradually increases until it reaches a state of equilibrium with the output pressure of the gas-liquid booster 5. Under high-pressure conditions, the pressure storage tank 10 can absorb fluid fluctuations caused by high pressure, ensuring more stable downstream pressure and precise pressure control.

[0064] In a specific implementation, the pressure-reducing filter regulating valve 3 is used to precisely control and regulate the pressure within the system, ensuring that the system operates within an appropriate pressure range to meet the needs of different particle crushing.

[0065] In a specific embodiment, the microchannel collision generator 14 can operate stably under system pressures of 100 MPa to 400 MPa. It stores the pressurized liquid required by the system through the pressure tank 10, provides a stable pressure source to the system, and can absorb fluid fluctuations caused by high pressure, ensuring that the pressure downstream of the system is more stable.

[0066] In a specific implementation, it also includes: a gas-liquid booster pump pressure gauge and a pressure tank gauge. The gas-liquid booster pump pressure gauge monitors the pressure of the product storage tank 15, and the pressure tank gauge monitors the pressure of the storage tank 10, so as to ensure the stable operation of the system and test the sealing effect of the platform.

[0067] In a specific embodiment, the upper flow channel 17 and the lower flow channel 18 are processed by a CNC engraving machine and a CNC EDM drilling machine; the specific processing flow includes: milling out the flow distribution cavity 19 and the sealing groove, preparing the through holes of the guide pipe 20 and the jet pipe 21, processing the through holes of the fastening bolt 16 and processing the inlet and outlet cone sealing joint of the device.

[0068] For the installation and sealing of the microchannel collision generator 14, please refer to [reference needed]. Figure 5 and Figure 6 During assembly, it is necessary to ensure the cleanliness of all flow channel components (such as the upper flow channel 17, lower flow channel 18, and metal sealing gaskets), remove impurities or dirt that may affect the seal, and check that the dimensions and specifications of all components meet the design requirements to ensure correct matching and assembly. The upper flow channel 17 and lower flow channel 18 are sealed with metal seals, with the metal seal placed between them. When the fastening bolts 16 are tightened, the metal seal is compressed and deformed, filling the gap between the upper flow channel 17 and lower flow channel 18 to form an effective seal. For the connection and sealing between the microchannel collision generator 14 and the raw material tank 13, please refer to [reference needed]. Figure 4 The cone seal is formed by the tight contact between the cone surface and the microchannel collision generating device 14.

[0069] After assembly, the microchannel collision generator 14 is subjected to a sealing performance test. A certain pressure of gas or liquid is injected into the microchannel collision generator 14, and it is observed whether the pressure can remain stable within a specified time. Simultaneously, leakage detection instruments (such as bubble detectors, ultrasonic leak detectors, etc.) are used to detect leaks in the microchannel collision generator 14. During the test, carefully observe for phenomena such as bubble generation or abnormal ultrasonic signals to determine if leakage exists. If the test results show that the microchannel collision generator 14 has good sealing performance and no leakage occurs, the assembly can be considered successful and meets the design requirements. If a leakage problem is found, it should be investigated and repaired promptly. First, determine the specific location of the leak, then analyze the cause of the leak (such as aging of the sealing gasket, insufficient tightening force, etc.), and take corresponding measures for repair. After repair, the sealing performance test should be repeated to verify the repair effect.

[0070] See Figure 7 and Figure 8The treatment effect of a high-pressure microchannel pulverization system for particle crushing was observed. After pulverization at 300 MPa, samples were collected, filtered, washed, and dried. A portion of the refined samples was then taken out, and the particle size was observed using an optical microscope. Referring to and comparing the particle size diagrams before and after treatment, it was found that after the 300 MPa high-pressure microchannel pulverization, the particle size was significantly reduced. Simultaneously, the particle surface changed from smooth to rough, and obvious cracks and debris were generated.

[0071] Components not described in detail in this embodiment are all existing components that can be purchased through public channels.

[0072] The above description of the embodiments is provided to enable those skilled in the art to understand and use the invention. It will be apparent to those skilled in the art that various modifications can be made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present invention is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the invention should be within the protection scope of the present invention.

Claims

1. A high-pressure microchannel particle pulverizing system, characterized in that, include: Microchannel collision generator (14) and control drive device; The control and drive device includes: an air compressor (1), a pressure reducing filter regulating valve (3), a gas-liquid booster (5), a low-pressure water source (6), an inlet check valve (8), an outlet check valve (9), a pressure tank (10), a pneumatic needle valve (11), a mechanical reversing valve (12), a raw material tank (13), and a product storage tank (15). The microchannel collision generating device (14) includes: an upper flow channel (17), a lower flow channel (18), a flow divider (19), a guide pipe (20), and a jet pipe (21); one end of the upper flow channel (17) is connected to the raw material tank (13) of the control drive device, and the other end is connected to one end of the lower flow channel (18), and the other end of the lower flow channel (18) is connected to the product storage tank (15); the flow divider (19), the guide pipe (20), and the jet pipe (21) are located on the lower flow channel (18); The upper flow channel (17) has a threaded hole drilled on its upper part to connect with the raw material tank (13). A micro-jet hole is drilled on the connection threaded hole for connecting with the cone sealing joint of the raw material tank (13). The dimensions of the flow divider (19), the guide pipe (20), and the jet pipe (21) decrease step by step, forming a channel structure for the fluid to be accelerated and pressurized step by step. Under the combined effect of the increase in flow velocity and the increase in fluid pressure, the particles are more likely to break when subjected to fluid impact. The control drive device pressurizes the fluid supplied by the low-pressure water source by controlling the gas-liquid booster (5), and then transports the pressurized fluid to the pressure tank (10) for pressure maintenance. Subsequently, the fluid is controlled to enter the microchannel collision generator (14) for impact crushing by the mechanical reversing valve (12) and the pneumatic needle valve (11). The crushed fluid and particles are collected in the product storage tank (15). During system operation, the fluid from the low-pressure water source (6) enters the gas-liquid booster (5) through the inlet check valve (8). The air compressor (1) provides compressed air, and the pressure reducing filter regulating valve (3) controls the gas pressure. The compressed air drives the piston of the gas-liquid booster (5) to pressurize the fluid. After pressurization, the fluid enters the pressure storage tank (10) through the outlet check valve (9) for pressure maintenance. When the mechanical reversing valve (12) opens the pneumatic needle valve (11), the high-pressure fluid carries the particles to be crushed in the raw material tank (13) into the microchannel collision generator (14) for impact and crushing. The fluid with the particles to be crushed passes through the crusher outlet and is collected in the product storage tank (15). The microchannel collision generator (14) adopts high-pressure static sealing technology and completes the sealing through a composite sealing method consisting of a high-strength bolt fastening kit, a metal sealing gasket, and a conical sealing joint.

2. The high-pressure microchannel particle pulverizing system according to claim 1, characterized in that, The outlet of the gas-liquid booster (5) is equipped with a high-pressure gauge to monitor its pressure changes and to detect the sealing effect of the platform; the compressed air inlet of the gas-liquid booster (5) is equipped with a gas pressure gauge (2) and an air inlet switch (4) to control the fluid boosting pressure.

3. The high-pressure microchannel particle pulverizing system according to claim 1, characterized in that, The low-pressure water source (6) is connected to the filter (7), and impurities in the fluid are filtered out through the filter (7). The filter (7) filters out impurities in the liquid entering the system, protecting the internal components of the system from contamination and wear.

4. The high-pressure microchannel particle pulverizing system according to claim 1, characterized in that, The upper flow channel (17) and the lower flow channel (18) are both made of 316L stainless steel. The upper flow channel (17) and the lower flow channel (18) have multiple through holes around their inlets and outlets with threads to accommodate high-strength bolt fastening kits for mechanical sealing of the upper flow channel (17) and the lower flow channel (18).

5. The high-pressure microchannel particle pulverizing system according to claim 1, characterized in that, The gas-liquid booster (5) can provide high-pressure hydraulic pressure at a compression ratio of 510:1 for an air pressure of 0.8MPa. The gas-liquid booster (5) has a large piston and a small piston. The boosting process is achieved through the pressure balance principle of the piston axis. The output pressure is proportional to the driving pressure. The boosting ratio is equal to the ratio of the force-bearing areas of the large and small pistons.

6. The high-pressure microchannel particle pulverizing system according to claim 1, characterized in that, The pressure reducing filter regulating valve (3) is used to control and regulate the pressure in the system to ensure that the system operates within an appropriate pressure range to meet the needs of different particle crushing.

7. The high-pressure microchannel particle pulverizing system according to claim 1, characterized in that, The microchannel collision generator (14) can operate stably under system pressure of 100 MPa to 400 MPa. It stores the pressurized liquid required by the system through the pressure tank (10), provides a stable pressure source to the system, and can absorb fluid fluctuations caused by high pressure, ensuring that the pressure downstream of the system is more stable.

8. The high-pressure microchannel particle pulverizing system according to claim 1, characterized in that, Also includes: The gas-liquid booster pump pressure gauge and the pressure tank pressure gauge monitor the pressure of the product storage tank (15) and the pressure tank pressure gauge monitor the pressure of the storage tank (10) to ensure the stable operation of the system and to test the sealing effect of the platform.

9. The high-pressure microchannel particle pulverizing system according to claim 1, characterized in that, The upper flow channel (17) and lower flow channel (18) are machined; the specific processing flow includes: machining the flow divider cavity (19) and sealing groove, preparing the through holes of the guide pipe (20) and jet pipe (21), machining the through holes of the fastening bolt (16) and machining the inlet and outlet cone sealing joint of the device.

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